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         const CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  60                         'coord', 'app', 'rendered-hash', 'rendered-html',
  61                         'object-type', 'object', 'target-type', 'target'];
  62
  63         /**
  64          * @brief Fetch a single item row
  65          *
  66          * @param mixed $stmt statement object
  67          * @return array current row
  68          */
  69         public static function fetch($stmt)
  70         {
  71                 $row = dba::fetch($stmt);
  72
  73                 // Fetch data from the item-content table whenever there is content there
  74                 foreach (self::CONTENT_FIELDLIST as $field) {
  75                         if (is_null($row[$field]) && !is_null($row['item-' . $field])) {
  76                                 $row[$field] = $row['item-' . $field];
  77                         }
  78                         unset($row['item-' . $field]);
  79                 }
  80
  81                 // We prefer the data from the user's contact over the public one
  82                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
  83                         ($row['author-link'] == $row['contact-link'])) {
  84                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
  85                                 $row['author-avatar'] = $row['contact-avatar'];
  86                         }
  87                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
  88                                 $row['author-name'] = $row['contact-name'];
  89                         }
  90                 }
  91
  92                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
  93                         ($row['owner-link'] == $row['contact-link'])) {
  94                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
  95                                 $row['owner-avatar'] = $row['contact-avatar'];
  96                         }
  97                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
  98                                 $row['owner-name'] = $row['contact-name'];
  99                         }
 100                 }
 101
 102                 // We can always comment on posts from these networks
 103                 if (isset($row['writable']) && !empty($row['network']) &&
 104                         in_array($row['network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
 105                         $row['writable'] = true;
 106                 }
 107
 108                 return $row;
 109         }
 110
 111         /**
 112          * @brief Fills an array with data from an item query
 113          *
 114          * @param object $stmt statement object
 115          * @return array Data array
 116          */
 117         public static function inArray($stmt, $do_close = true) {
 118                 if (is_bool($stmt)) {
 119                         return $stmt;
 120                 }
 121
 122                 $data = [];
 123                 while ($row = self::fetch($stmt)) {
 124                         $data[] = $row;
 125                 }
 126                 if ($do_close) {
 127                         dba::close($stmt);
 128                 }
 129                 return $data;
 130         }
 131
 132         /**
 133          * Retrieve a single record from the item table for a given user and returns it in an associative array
 134          *
 135          * @brief Retrieve a single record from a table
 136          * @param integer $uid User ID
 137          * @param array  $fields
 138          * @param array  $condition
 139          * @param array  $params
 140          * @return bool|array
 141          * @see dba::select
 142          */
 143         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 144         {
 145                 $params['uid'] = $uid;
 146
 147                 if (empty($selected)) {
 148                         $selected = Item::DISPLAY_FIELDLIST;
 149                 }
 150
 151                 return self::selectFirst($selected, $condition, $params);
 152         }
 153
 154         /**
 155          * @brief Select rows from the item table for a given user
 156          *
 157          * @param integer $uid User ID
 158          * @param array  $selected  Array of selected fields, empty for all
 159          * @param array  $condition Array of fields for condition
 160          * @param array  $params    Array of several parameters
 161          *
 162          * @return boolean|object
 163          */
 164         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 165         {
 166                 $params['uid'] = $uid;
 167
 168                 if (empty($selected)) {
 169                         $selected = Item::DISPLAY_FIELDLIST;
 170                 }
 171
 172                 return self::select($selected, $condition, $params);
 173         }
 174
 175         /**
 176          * Retrieve a single record from the item table and returns it in an associative array
 177          *
 178          * @brief Retrieve a single record from a table
 179          * @param array  $fields
 180          * @param array  $condition
 181          * @param array  $params
 182          * @return bool|array
 183          * @see dba::select
 184          */
 185         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 186         {
 187                 $params['limit'] = 1;
 188
 189                 $result = self::select($fields, $condition, $params);
 190
 191                 if (is_bool($result)) {
 192                         return $result;
 193                 } else {
 194                         $row = self::fetch($result);
 195                         dba::close($result);
 196                         return $row;
 197                 }
 198         }
 199
 200         /**
 201          * @brief Select rows from the item table
 202          *
 203          * @param array  $selected  Array of selected fields, empty for all
 204          * @param array  $condition Array of fields for condition
 205          * @param array  $params    Array of several parameters
 206          *
 207          * @return boolean|object
 208          */
 209         public static function select(array $selected = [], array $condition = [], $params = [])
 210         {
 211                 $uid = 0;
 212                 $usermode = false;
 213
 214                 if (isset($params['uid'])) {
 215                         $uid = $params['uid'];
 216                         $usermode = true;
 217                 }
 218
 219                 $fields = self::fieldlist($selected);
 220
 221                 $select_fields = self::constructSelectFields($fields, $selected);
 222
 223                 $condition_string = dba::buildCondition($condition);
 224
 225                 $condition_string = self::addTablesToFields($condition_string, $fields);
 226
 227                 if ($usermode) {
 228                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 229                 }
 230
 231                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 232
 233                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false);
 234
 235                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 236
 237                 return dba::p($sql, $condition);
 238         }
 239
 240         /**
 241          * @brief Select rows from the starting post in the item table
 242          *
 243          * @param integer $uid User ID
 244          * @param array  $fields    Array of selected fields, empty for all
 245          * @param array  $condition Array of fields for condition
 246          * @param array  $params    Array of several parameters
 247          *
 248          * @return boolean|object
 249          */
 250         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 251         {
 252                 $params['uid'] = $uid;
 253
 254                 if (empty($selected)) {
 255                         $selected = Item::DISPLAY_FIELDLIST;
 256                 }
 257
 258                 return self::selectThread($selected, $condition, $params);
 259         }
 260
 261         /**
 262          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 263          *
 264          * @brief Retrieve a single record from a table
 265          * @param integer $uid User ID
 266          * @param array  $selected
 267          * @param array  $condition
 268          * @param array  $params
 269          * @return bool|array
 270          * @see dba::select
 271          */
 272         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 273         {
 274                 $params['uid'] = $uid;
 275
 276                 if (empty($selected)) {
 277                         $selected = Item::DISPLAY_FIELDLIST;
 278                 }
 279
 280                 return self::selectFirstThread($selected, $condition, $params);
 281         }
 282
 283         /**
 284          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 285          *
 286          * @brief Retrieve a single record from a table
 287          * @param array  $fields
 288          * @param array  $condition
 289          * @param array  $params
 290          * @return bool|array
 291          * @see dba::select
 292          */
 293         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 294         {
 295                 $params['limit'] = 1;
 296                 $result = self::selectThread($fields, $condition, $params);
 297
 298                 if (is_bool($result)) {
 299                         return $result;
 300                 } else {
 301                         $row = self::fetch($result);
 302                         dba::close($result);
 303                         return $row;
 304                 }
 305         }
 306
 307         /**
 308          * @brief Select rows from the starting post in the item table
 309          *
 310          * @param array  $selected  Array of selected fields, empty for all
 311          * @param array  $condition Array of fields for condition
 312          * @param array  $params    Array of several parameters
 313          *
 314          * @return boolean|object
 315          */
 316         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 317         {
 318                 $uid = 0;
 319                 $usermode = false;
 320
 321                 if (isset($params['uid'])) {
 322                         $uid = $params['uid'];
 323                         $usermode = true;
 324                 }
 325
 326                 $fields = self::fieldlist($selected);
 327
 328                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 329                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 330                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 331                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 332
 333                 $select_fields = self::constructSelectFields($fields, $selected);
 334
 335                 $condition_string = dba::buildCondition($condition);
 336
 337                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 338                 $condition_string = self::addTablesToFields($condition_string, $fields);
 339
 340                 if ($usermode) {
 341                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 342                 }
 343
 344                 $param_string = dba::buildParameter($params);
 345                 $param_string = self::addTablesToFields($param_string, $threadfields);
 346                 $param_string = self::addTablesToFields($param_string, $fields);
 347
 348                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true);
 349
 350                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 351
 352                 return dba::p($sql, $condition);
 353         }
 354
 355         /**
 356          * @brief Returns a list of fields that are associated with the item table
 357          *
 358          * @return array field list
 359          */
 360         private static function fieldlist($selected)
 361         {
 362                 $fields = [];
 363
 364                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 365                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 366                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 367                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
 368                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 369                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 370                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 371                         'id' => 'item_id', 'network'];
 372
 373                 $fields['item-content'] = self::CONTENT_FIELDLIST;
 374
 375                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 376                         'thumb' => 'author-avatar', 'nick' => 'author-nick'];
 377
 378                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 379                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick'];
 380
 381                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 382                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 383                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 384
 385                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 386
 387                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 388
 389                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 390                         'start' => 'event-start','finish' => 'event-finish',
 391                         'summary' => 'event-summary','desc' => 'event-desc',
 392                         'location' => 'event-location', 'type' => 'event-type',
 393                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 394                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 395
 396                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 397
 398                 return $fields;
 399         }
 400
 401         /**
 402          * @brief Returns SQL condition for the "select" functions
 403          *
 404          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 405          *
 406          * @return string SQL condition
 407          */
 408         private static function condition($thread_mode)
 409         {
 410                 if ($thread_mode) {
 411                         $master_table = "`thread`";
 412                 } else {
 413                         $master_table = "`item`";
 414                 }
 415                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 416         }
 417
 418         /**
 419          * @brief Returns all needed "JOIN" commands for the "select" functions
 420          *
 421          * @param integer $uid User ID
 422          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 423          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 424          *
 425          * @return string The SQL joins for the "select" functions
 426          */
 427         private static function constructJoins($uid, $sql_commands, $thread_mode)
 428         {
 429                 if ($thread_mode) {
 430                         $master_table = "`thread`";
 431                         $master_table_key = "`thread`.`iid`";
 432                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 433                 } else {
 434                         $master_table = "`item`";
 435                         $master_table_key = "`item`.`id`";
 436                         $joins = '';
 437                 }
 438
 439                 $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 440                         AND NOT `contact`.`blocked`
 441                         AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 442                         OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 443                         STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 444                         STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 445                         LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 446                         CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 447
 448                 if (strpos($sql_commands, "`group_member`.") !== false) {
 449                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 450                 }
 451
 452                 if (strpos($sql_commands, "`user`.") !== false) {
 453                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 454                 }
 455
 456                 if (strpos($sql_commands, "`event`.") !== false) {
 457                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 458                 }
 459
 460                 if (strpos($sql_commands, "`sign`.") !== false) {
 461                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 462                 }
 463
 464                 if (strpos($sql_commands, "`item-content`.") !== false) {
 465                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
 466                 }
 467
 468                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 469                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 470                 }
 471
 472                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 473                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 474                 }
 475
 476                 return $joins;
 477         }
 478
 479         /**
 480          * @brief Add the field list for the "select" functions
 481          *
 482          * @param array $fields The field definition array
 483          * @param array $selected The array with the selected fields from the "select" functions
 484          *
 485          * @return string The field list
 486          */
 487         private static function constructSelectFields($fields, $selected)
 488         {
 489                 $selection = [];
 490                 foreach ($fields as $table => $table_fields) {
 491                         foreach ($table_fields as $field => $select) {
 492                                 if (empty($selected) || in_array($select, $selected)) {
 493                                         if (in_array($select, self::CONTENT_FIELDLIST)) {
 494                                                 $selection[] = "`item`.`".$select."` AS `item-" . $select . "`";
 495                                         }
 496                                         if (is_int($field)) {
 497                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 498                                         } else {
 499                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 500                                         }
 501                                 }
 502                         }
 503                 }
 504                 return implode(", ", $selection);
 505         }
 506
 507         /**
 508          * @brief add table definition to fields in an SQL query
 509          *
 510          * @param string $query SQL query
 511          * @param array $fields The field definition array
 512          *
 513          * @return string the changed SQL query
 514          */
 515         private static function addTablesToFields($query, $fields)
 516         {
 517                 foreach ($fields as $table => $table_fields) {
 518                         foreach ($table_fields as $alias => $field) {
 519                                 if (is_int($alias)) {
 520                                         $replace_field = $field;
 521                                 } else {
 522                                         $replace_field = $alias;
 523                                 }
 524
 525                                 $search = "/([^\.])`" . $field . "`/i";
 526                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 527                                 $query = preg_replace($search, $replace, $query);
 528                         }
 529                 }
 530                 return $query;
 531         }
 532
 533         /**
 534          * @brief Update existing item entries
 535          *
 536          * @param array $fields The fields that are to be changed
 537          * @param array $condition The condition for finding the item entries
 538          *
 539          * In the future we may have to change permissions as well.
 540          * Then we had to add the user id as third parameter.
 541          *
 542          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 543          *
 544          * @return integer|boolean number of affected rows - or "false" if there was an error
 545          */
 546         public static function update(array $fields, array $condition)
 547         {
 548                 if (empty($condition) || empty($fields)) {
 549                         return false;
 550                 }
 551
 552                 // To ensure the data integrity we do it in an transaction
 553                 dba::transaction();
 554
 555                 // We cannot simply expand the condition to check for origin entries
 556                 // The condition needn't to be a simple array but could be a complex condition.
 557                 // And we have to execute this query before the update to ensure to fetch the same data.
 558                 $items = dba::select('item', ['id', 'origin', 'uri'], $condition);
 559
 560                 $content_fields = [];
 561                 foreach (self::CONTENT_FIELDLIST as $field) {
 562                         if (isset($fields[$field])) {
 563                                 $content_fields[$field] = $fields[$field];
 564                                 unset($fields[$field]);
 565                         }
 566                 }
 567
 568                 if (!empty($fields)) {
 569                         $success = dba::update('item', $fields, $condition);
 570
 571                         if (!$success) {
 572                                 dba::close($items);
 573                                 dba::rollback();
 574                                 return false;
 575                         }
 576                 }
 577
 578                 // When there is no content for the "old" item table, this will count the fetched items
 579                 $rows = dba::affected_rows();
 580
 581                 while ($item = dba::fetch($items)) {
 582                         self::updateContent($content_fields, ['id' => $item['icid']]);
 583                         Term::insertFromTagFieldByItemId($item['id']);
 584                         Term::insertFromFileFieldByItemId($item['id']);
 585                         self::updateThread($item['id']);
 586
 587                         // We only need to notfiy others when it is an original entry from us.
 588                         // Only call the notifier when the item has some content relevant change.
 589                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 590                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 591                         }
 592                 }
 593
 594                 dba::close($items);
 595                 dba::commit();
 596                 return $rows;
 597         }
 598
 599         /**
 600          * @brief Delete an item and notify others about it - if it was ours
 601          *
 602          * @param array $condition The condition for finding the item entries
 603          * @param integer $priority Priority for the notification
 604          */
 605         public static function delete($condition, $priority = PRIORITY_HIGH)
 606         {
 607                 $items = dba::select('item', ['id'], $condition);
 608                 while ($item = dba::fetch($items)) {
 609                         self::deleteById($item['id'], $priority);
 610                 }
 611                 dba::close($items);
 612         }
 613
 614         /**
 615          * @brief Delete an item for an user and notify others about it - if it was ours
 616          *
 617          * @param array $condition The condition for finding the item entries
 618          * @param integer $uid User who wants to delete this item
 619          */
 620         public static function deleteForUser($condition, $uid)
 621         {
 622                 if ($uid == 0) {
 623                         return;
 624                 }
 625
 626                 $items = dba::select('item', ['id', 'uid'], $condition);
 627                 while ($item = dba::fetch($items)) {
 628                         // "Deleting" global items just means hiding them
 629                         if ($item['uid'] == 0) {
 630                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 631                         } elseif ($item['uid'] == $uid) {
 632                                 self::deleteById($item['id'], PRIORITY_HIGH);
 633                         } else {
 634                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 635                         }
 636                 }
 637                 dba::close($items);
 638         }
 639
 640         /**
 641          * @brief Delete an item and notify others about it - if it was ours
 642          *
 643          * @param integer $item_id Item ID that should be delete
 644          * @param integer $priority Priority for the notification
 645          *
 646          * @return boolean success
 647          */
 648         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 649         {
 650                 // locate item to be deleted
 651                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 652                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 653                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 654                 $item = dba::selectFirst('item', $fields, ['id' => $item_id]);
 655                 if (!DBM::is_result($item)) {
 656                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 657                         return false;
 658                 }
 659
 660                 if ($item['deleted']) {
 661                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 662                         return false;
 663                 }
 664
 665                 $parent = dba::selectFirst('item', ['origin'], ['id' => $item['parent']]);
 666                 if (!DBM::is_result($parent)) {
 667                         $parent = ['origin' => false];
 668                 }
 669
 670                 // clean up categories and tags so they don't end up as orphans
 671
 672                 $matches = false;
 673                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 674                 if ($cnt) {
 675                         foreach ($matches as $mtch) {
 676                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 677                         }
 678                 }
 679
 680                 $matches = false;
 681
 682                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 683                 if ($cnt) {
 684                         foreach ($matches as $mtch) {
 685                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 686                         }
 687                 }
 688
 689                 /*
 690                  * If item is a link to a photo resource, nuke all the associated photos
 691                  * (visitors will not have photo resources)
 692                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 693                  * generate a resource-id and therefore aren't intimately linked to the item.
 694                  */
 695                 if (strlen($item['resource-id'])) {
 696                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 697                 }
 698
 699                 // If item is a link to an event, delete the event.
 700                 if (intval($item['event-id'])) {
 701                         Event::delete($item['event-id']);
 702                 }
 703
 704                 // If item has attachments, drop them
 705                 foreach (explode(", ", $item['attach']) as $attach) {
 706                         preg_match("|attach/(\d+)|", $attach, $matches);
 707                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 708                 }
 709
 710                 // Delete tags that had been attached to other items
 711                 self::deleteTagsFromItem($item);
 712
 713                 // Set the item to "deleted"
 714                 dba::update('item', ['deleted' => true, 'title' => '', 'body' => '',
 715                                         'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()],
 716                                 ['id' => $item['id']]);
 717
 718                 Term::insertFromTagFieldByItemId($item['id']);
 719                 Term::insertFromFileFieldByItemId($item['id']);
 720                 self::deleteThread($item['id'], $item['parent-uri']);
 721
 722                 if (!dba::exists('item', ["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 723                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 724                 }
 725
 726                 // If it's the parent of a comment thread, kill all the kids
 727                 if ($item['id'] == $item['parent']) {
 728                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 729                 }
 730
 731                 // Is it our comment and/or our thread?
 732                 if ($item['origin'] || $parent['origin']) {
 733
 734                         // When we delete the original post we will delete all existing copies on the server as well
 735                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 736
 737                         // send the notification upstream/downstream
 738                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 739                 } elseif ($item['uid'] != 0) {
 740
 741                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 742                         $global_item = dba::selectFirst('item', ['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 743                         if (DBM::is_result($global_item)) {
 744                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 745                         }
 746                 }
 747
 748                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 749
 750                 return true;
 751         }
 752
 753         private static function deleteTagsFromItem($item)
 754         {
 755                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 756                         return;
 757                 }
 758
 759                 $xo = XML::parseString($item["object"], false);
 760                 $xt = XML::parseString($item["target"], false);
 761
 762                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 763                         return;
 764                 }
 765
 766                 $i = dba::selectFirst('item', ['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 767                 if (!DBM::is_result($i)) {
 768                         return;
 769                 }
 770
 771                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 772                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 773                 $author_copy = $item["origin"];
 774
 775                 if (($owner_remove && $author_copy) || !$owner_remove) {
 776                         return;
 777                 }
 778
 779                 $tags = explode(',', $i["tag"]);
 780                 $newtags = [];
 781                 if (count($tags)) {
 782                         foreach ($tags as $tag) {
 783                                 if (trim($tag) !== trim($xo->body)) {
 784                                        $newtags[] = trim($tag);
 785                                 }
 786                         }
 787                 }
 788                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 789         }
 790
 791         private static function guid($item, $notify)
 792         {
 793                 $guid = notags(trim($item['guid']));
 794
 795                 if (!empty($guid)) {
 796                         return $guid;
 797                 }
 798
 799                 if ($notify) {
 800                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 801                         // We add the hash of our own host because our host is the original creator of the post.
 802                         $prefix_host = get_app()->get_hostname();
 803                 } else {
 804                         $prefix_host = '';
 805
 806                         // We are only storing the post so we create a GUID from the original hostname.
 807                         if (!empty($item['author-link'])) {
 808                                 $parsed = parse_url($item['author-link']);
 809                                 if (!empty($parsed['host'])) {
 810                                         $prefix_host = $parsed['host'];
 811                                 }
 812                         }
 813
 814                         if (empty($prefix_host) && !empty($item['plink'])) {
 815                                 $parsed = parse_url($item['plink']);
 816                                 if (!empty($parsed['host'])) {
 817                                         $prefix_host = $parsed['host'];
 818                                 }
 819                         }
 820
 821                         if (empty($prefix_host) && !empty($item['uri'])) {
 822                                 $parsed = parse_url($item['uri']);
 823                                 if (!empty($parsed['host'])) {
 824                                         $prefix_host = $parsed['host'];
 825                                 }
 826                         }
 827
 828                         // Is it in the format data@host.tld? - Used for mail contacts
 829                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 830                                 $mailparts = explode('@', $item['author-link']);
 831                                 $prefix_host = array_pop($mailparts);
 832                         }
 833                 }
 834
 835                 if (!empty($item['plink'])) {
 836                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 837                 } elseif (!empty($item['uri'])) {
 838                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 839                 } else {
 840                         $guid = get_guid(32, hash('crc32', $prefix_host));
 841                 }
 842
 843                 return $guid;
 844         }
 845
 846         private static function contactId($item)
 847         {
 848                 $contact_id = (int)$item["contact-id"];
 849
 850                 if (!empty($contact_id)) {
 851                         return $contact_id;
 852                 }
 853                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 854                 /*
 855                  * First we are looking for a suitable contact that matches with the author of the post
 856                  * This is done only for comments
 857                  */
 858                 if ($item['parent-uri'] != $item['uri']) {
 859                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 860                 }
 861
 862                 // If not present then maybe the owner was found
 863                 if ($contact_id == 0) {
 864                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 865                 }
 866
 867                 // Still missing? Then use the "self" contact of the current user
 868                 if ($contact_id == 0) {
 869                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 870                         if (DBM::is_result($self)) {
 871                                 $contact_id = $self["id"];
 872                         }
 873                 }
 874                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 875
 876                 return $contact_id;
 877         }
 878
 879         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 880         {
 881                 $a = get_app();
 882
 883                 // If it is a posting where users should get notifications, then define it as wall posting
 884                 if ($notify) {
 885                         $item['wall'] = 1;
 886                         $item['type'] = 'wall';
 887                         $item['origin'] = 1;
 888                         $item['network'] = NETWORK_DFRN;
 889                         $item['protocol'] = PROTOCOL_DFRN;
 890
 891                         if (is_int($notify)) {
 892                                 $priority = $notify;
 893                         } else {
 894                                 $priority = PRIORITY_HIGH;
 895                         }
 896                 } else {
 897                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 898                 }
 899
 900                 $item['guid'] = self::guid($item, $notify);
 901                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
 902
 903                 // Store conversation data
 904                 $item = Conversation::insert($item);
 905
 906                 /*
 907                  * If a Diaspora signature structure was passed in, pull it out of the
 908                  * item array and set it aside for later storage.
 909                  */
 910
 911                 $dsprsig = null;
 912                 if (x($item, 'dsprsig')) {
 913                         $encoded_signature = $item['dsprsig'];
 914                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
 915                         unset($item['dsprsig']);
 916                 }
 917
 918                 if (!empty($item['diaspora_signed_text'])) {
 919                         $diaspora_signed_text = $item['diaspora_signed_text'];
 920                         unset($item['diaspora_signed_text']);
 921                 } else {
 922                         $diaspora_signed_text = '';
 923                 }
 924
 925                 // Converting the plink
 926                 /// @TODO Check if this is really still needed
 927                 if ($item['network'] == NETWORK_OSTATUS) {
 928                         if (isset($item['plink'])) {
 929                                 $item['plink'] = OStatus::convertHref($item['plink']);
 930                         } elseif (isset($item['uri'])) {
 931                                 $item['plink'] = OStatus::convertHref($item['uri']);
 932                         }
 933                 }
 934
 935                 if (!empty($item['thr-parent'])) {
 936                         $item['parent-uri'] = $item['thr-parent'];
 937                 }
 938
 939                 if (x($item, 'gravity')) {
 940                         $item['gravity'] = intval($item['gravity']);
 941                 } elseif ($item['parent-uri'] === $item['uri']) {
 942                         $item['gravity'] = 0;
 943                 } elseif (activity_match($item['verb'],ACTIVITY_POST)) {
 944                         $item['gravity'] = 6;
 945                 } else {
 946                         $item['gravity'] = 6;   // extensible catchall
 947                 }
 948
 949                 $item['type'] = defaults($item, 'type', 'remote');
 950
 951                 $uid = intval($item['uid']);
 952
 953                 // check for create date and expire time
 954                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
 955
 956                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
 957                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 958                         $expire_interval = $user['expire'];
 959                 }
 960
 961                 if (($expire_interval > 0) && !empty($item['created'])) {
 962                         $expire_date = time() - ($expire_interval * 86400);
 963                         $created_date = strtotime($item['created']);
 964                         if ($created_date < $expire_date) {
 965                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
 966                                 return 0;
 967                         }
 968                 }
 969
 970                 /*
 971                  * Do we already have this item?
 972                  * We have to check several networks since Friendica posts could be repeated
 973                  * via OStatus (maybe Diasporsa as well)
 974                  */
 975                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
 976                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
 977                                 trim($item['uri']), $item['uid'],
 978                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
 979                         $existing = dba::selectFirst('item', ['id', 'network'], $condition);
 980                         if (DBM::is_result($existing)) {
 981                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 982                                 if ($uid != 0) {
 983                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
 984                                 }
 985
 986                                 return $existing["id"];
 987                         }
 988                 }
 989
 990                 self::addLanguageInPostopts($item);
 991
 992                 $item['wall']          = intval(defaults($item, 'wall', 0));
 993                 $item['extid']         = trim(defaults($item, 'extid', ''));
 994                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
 995                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
 996                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
 997                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
 998                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
 999                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1000                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1001                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1002                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1003                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1004                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1005                 $item['title']         = trim(defaults($item, 'title', ''));
1006                 $item['location']      = trim(defaults($item, 'location', ''));
1007                 $item['coord']         = trim(defaults($item, 'coord', ''));
1008                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1009                 $item['deleted']       = 0;
1010                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1011                 $item['verb']          = trim(defaults($item, 'verb', ''));
1012                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1013                 $item['object']        = trim(defaults($item, 'object', ''));
1014                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1015                 $item['target']        = trim(defaults($item, 'target', ''));
1016                 $item['plink']         = trim(defaults($item, 'plink', ''));
1017                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1018                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1019                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1020                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1021                 $item['private']       = intval(defaults($item, 'private', 0));
1022                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1023                 $item['body']          = trim(defaults($item, 'body', ''));
1024                 $item['tag']           = trim(defaults($item, 'tag', ''));
1025                 $item['attach']        = trim(defaults($item, 'attach', ''));
1026                 $item['app']           = trim(defaults($item, 'app', ''));
1027                 $item['origin']        = intval(defaults($item, 'origin', 0));
1028                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1029                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1030                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1031                 $item['inform']        = trim(defaults($item, 'inform', ''));
1032                 $item['file']          = trim(defaults($item, 'file', ''));
1033
1034                 // When there is no content then we don't post it
1035                 if ($item['body'].$item['title'] == '') {
1036                         return 0;
1037                 }
1038
1039                 // Items cannot be stored before they happen ...
1040                 if ($item['created'] > DateTimeFormat::utcNow()) {
1041                         $item['created'] = DateTimeFormat::utcNow();
1042                 }
1043
1044                 // We haven't invented time travel by now.
1045                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1046                         $item['edited'] = DateTimeFormat::utcNow();
1047                 }
1048
1049                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1050                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1051                 }
1052
1053                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1054
1055                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1056                 $item["contact-id"] = self::contactId($item);
1057
1058                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1059                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1060
1061                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1062
1063                 if (Contact::isBlocked($item["author-id"])) {
1064                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1065                         return 0;
1066                 }
1067
1068                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1069                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1070
1071                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1072
1073                 if (Contact::isBlocked($item["owner-id"])) {
1074                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1075                         return 0;
1076                 }
1077
1078                 //unset($item['author-link']);
1079                 unset($item['author-name']);
1080                 unset($item['author-avatar']);
1081
1082                 //unset($item['owner-link']);
1083                 unset($item['owner-name']);
1084                 unset($item['owner-avatar']);
1085
1086                 if ($item['network'] == NETWORK_PHANTOM) {
1087                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1088
1089                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1090                         if (!empty($contact['network'])) {
1091                                 $item['network'] = $contact["network"];
1092                         } else {
1093                                 $item['network'] = NETWORK_DFRN;
1094                         }
1095                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1096                 }
1097
1098                 // Checking if there is already an item with the same guid
1099                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1100                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1101                 if (dba::exists('item', $condition)) {
1102                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1103                         return 0;
1104                 }
1105
1106                 // Check for hashtags in the body and repair or add hashtag links
1107                 self::setHashtags($item);
1108
1109                 $item['thr-parent'] = $item['parent-uri'];
1110
1111                 $notify_type = '';
1112                 $allow_cid = '';
1113                 $allow_gid = '';
1114                 $deny_cid  = '';
1115                 $deny_gid  = '';
1116
1117                 if ($item['parent-uri'] === $item['uri']) {
1118                         $parent_id = 0;
1119                         $parent_deleted = 0;
1120                         $allow_cid = $item['allow_cid'];
1121                         $allow_gid = $item['allow_gid'];
1122                         $deny_cid  = $item['deny_cid'];
1123                         $deny_gid  = $item['deny_gid'];
1124                         $notify_type = 'wall-new';
1125                 } else {
1126                         // find the parent and snarf the item id and ACLs
1127                         // and anything else we need to inherit
1128
1129                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1130                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1131                                 'wall', 'private', 'forum_mode', 'origin'];
1132                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1133                         $params = ['order' => ['id' => false]];
1134                         $parent = dba::selectFirst('item', $fields, $condition, $params);
1135
1136                         if (DBM::is_result($parent)) {
1137                                 // is the new message multi-level threaded?
1138                                 // even though we don't support it now, preserve the info
1139                                 // and re-attach to the conversation parent.
1140
1141                                 if ($parent['uri'] != $parent['parent-uri']) {
1142                                         $item['parent-uri'] = $parent['parent-uri'];
1143
1144                                         $condition = ['uri' => $item['parent-uri'],
1145                                                 'parent-uri' => $item['parent-uri'],
1146                                                 'uid' => $item['uid']];
1147                                         $params = ['order' => ['id' => false]];
1148                                         $toplevel_parent = dba::selectFirst('item', $fields, $condition, $params);
1149
1150                                         if (DBM::is_result($toplevel_parent)) {
1151                                                 $parent = $toplevel_parent;
1152                                         }
1153                                 }
1154
1155                                 $parent_id      = $parent['id'];
1156                                 $parent_deleted = $parent['deleted'];
1157                                 $allow_cid      = $parent['allow_cid'];
1158                                 $allow_gid      = $parent['allow_gid'];
1159                                 $deny_cid       = $parent['deny_cid'];
1160                                 $deny_gid       = $parent['deny_gid'];
1161                                 $item['wall']    = $parent['wall'];
1162                                 $notify_type    = 'comment-new';
1163
1164                                 /*
1165                                  * If the parent is private, force privacy for the entire conversation
1166                                  * This differs from the above settings as it subtly allows comments from
1167                                  * email correspondents to be private even if the overall thread is not.
1168                                  */
1169                                 if ($parent['private']) {
1170                                         $item['private'] = $parent['private'];
1171                                 }
1172
1173                                 /*
1174                                  * Edge case. We host a public forum that was originally posted to privately.
1175                                  * The original author commented, but as this is a comment, the permissions
1176                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1177                                  */
1178                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1179                                         $item['private'] = 0;
1180                                 }
1181
1182                                 // If its a post from myself then tag the thread as "mention"
1183                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1184                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1185                                 if (DBM::is_result($user)) {
1186                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1187                                         $self_id = Contact::getIdForURL($self, 0, true);
1188                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1189                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1190                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1191                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1192                                         }
1193                                 }
1194                         } else {
1195                                 /*
1196                                  * Allow one to see reply tweets from status.net even when
1197                                  * we don't have or can't see the original post.
1198                                  */
1199                                 if ($force_parent) {
1200                                         logger('$force_parent=true, reply converted to top-level post.');
1201                                         $parent_id = 0;
1202                                         $item['parent-uri'] = $item['uri'];
1203                                         $item['gravity'] = 0;
1204                                 } else {
1205                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1206                                         return 0;
1207                                 }
1208
1209                                 $parent_deleted = 0;
1210                         }
1211                 }
1212
1213                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1214                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1215                 if (dba::exists('item', $condition)) {
1216                         logger('duplicated item with the same uri found. '.print_r($item,true));
1217                         return 0;
1218                 }
1219
1220                 // On Friendica and Diaspora the GUID is unique
1221                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1222                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1223                         if (dba::exists('item', $condition)) {
1224                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1225                                 return 0;
1226                         }
1227                 } else {
1228                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1229                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1230                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1231                         if (dba::exists('item', $condition)) {
1232                                 logger('duplicated item with the same body found. '.print_r($item,true));
1233                                 return 0;
1234                         }
1235                 }
1236
1237                 // Is this item available in the global items (with uid=0)?
1238                 if ($item["uid"] == 0) {
1239                         $item["global"] = true;
1240
1241                         // Set the global flag on all items if this was a global item entry
1242                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1243                 } else {
1244                         $item["global"] = dba::exists('item', ['uid' => 0, 'uri' => $item["uri"]]);
1245                 }
1246
1247                 // ACL settings
1248                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1249                         $private = 1;
1250                 } else {
1251                         $private = $item['private'];
1252                 }
1253
1254                 $item["allow_cid"] = $allow_cid;
1255                 $item["allow_gid"] = $allow_gid;
1256                 $item["deny_cid"] = $deny_cid;
1257                 $item["deny_gid"] = $deny_gid;
1258                 $item["private"] = $private;
1259                 $item["deleted"] = $parent_deleted;
1260
1261                 // Fill the cache field
1262                 put_item_in_cache($item);
1263
1264                 if ($notify) {
1265                         Addon::callHooks('post_local', $item);
1266                 } else {
1267                         Addon::callHooks('post_remote', $item);
1268                 }
1269
1270                 // This array field is used to trigger some automatic reactions
1271                 // It is mainly used in the "post_local" hook.
1272                 unset($item['api_source']);
1273
1274                 if (x($item, 'cancel')) {
1275                         logger('post cancelled by addon.');
1276                         return 0;
1277                 }
1278
1279                 /*
1280                  * Check for already added items.
1281                  * There is a timing issue here that sometimes creates double postings.
1282                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1283                  */
1284                 if ($item["uid"] == 0) {
1285                         if (dba::exists('item', ['uri' => trim($item['uri']), 'uid' => 0])) {
1286                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1287                                 return 0;
1288                         }
1289                 }
1290
1291                 logger('' . print_r($item,true), LOGGER_DATA);
1292
1293                 dba::transaction();
1294                 self::insertContent($item);
1295                 $ret = dba::insert('item', $item);
1296
1297                 // When the item was successfully stored we fetch the ID of the item.
1298                 if (DBM::is_result($ret)) {
1299                         $current_post = dba::lastInsertId();
1300                 } else {
1301                         // This can happen - for example - if there are locking timeouts.
1302                         dba::rollback();
1303
1304                         // Store the data into a spool file so that we can try again later.
1305
1306                         // At first we restore the Diaspora signature that we removed above.
1307                         if (isset($encoded_signature)) {
1308                                 $item['dsprsig'] = $encoded_signature;
1309                         }
1310
1311                         // Now we store the data in the spool directory
1312                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1313                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1314
1315                         $spoolpath = get_spoolpath();
1316                         if ($spoolpath != "") {
1317                                 $spool = $spoolpath.'/'.$file;
1318                                 file_put_contents($spool, json_encode($item));
1319                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1320                         }
1321                         return 0;
1322                 }
1323
1324                 if ($current_post == 0) {
1325                         // This is one of these error messages that never should occur.
1326                         logger("couldn't find created item - we better quit now.");
1327                         dba::rollback();
1328                         return 0;
1329                 }
1330
1331                 // How much entries have we created?
1332                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1333                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1334
1335                 if ($entries > 1) {
1336                         // There are duplicates. We delete our just created entry.
1337                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1338
1339                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1340                         dba::delete('item', ['id' => $current_post]);
1341                         dba::commit();
1342                         return 0;
1343                 } elseif ($entries == 0) {
1344                         // This really should never happen since we quit earlier if there were problems.
1345                         logger("Something is terribly wrong. We haven't found our created entry.");
1346                         dba::rollback();
1347                         return 0;
1348                 }
1349
1350                 logger('created item '.$current_post);
1351                 self::updateContact($item);
1352
1353                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1354                         $parent_id = $current_post;
1355                 }
1356
1357                 // Set parent id
1358                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1359
1360                 $item['id'] = $current_post;
1361                 $item['parent'] = $parent_id;
1362
1363                 // update the commented timestamp on the parent
1364                 // Only update "commented" if it is really a comment
1365                 if (($item['verb'] == ACTIVITY_POST) || !Config::get("system", "like_no_comment")) {
1366                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1367                 } else {
1368                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1369                 }
1370
1371                 if ($dsprsig) {
1372                         /*
1373                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1374                          * We can check for this condition when we decode and encode the stuff again.
1375                          */
1376                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1377                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1378                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1379                         }
1380
1381                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1382                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1383                 }
1384
1385                 if (!empty($diaspora_signed_text)) {
1386                         // Formerly we stored the signed text, the signature and the author in different fields.
1387                         // We now store the raw data so that we are more flexible.
1388                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1389                 }
1390
1391                 $deleted = self::tagDeliver($item['uid'], $current_post);
1392
1393                 /*
1394                  * current post can be deleted if is for a community page and no mention are
1395                  * in it.
1396                  */
1397                 if (!$deleted && !$dontcache) {
1398                         $posted_item = dba::selectFirst('item', [], ['id' => $current_post]);
1399                         if (DBM::is_result($posted_item)) {
1400                                 if ($notify) {
1401                                         Addon::callHooks('post_local_end', $posted_item);
1402                                 } else {
1403                                         Addon::callHooks('post_remote_end', $posted_item);
1404                                 }
1405                         } else {
1406                                 logger('new item not found in DB, id ' . $current_post);
1407                         }
1408                 }
1409
1410                 if ($item['parent-uri'] === $item['uri']) {
1411                         self::addThread($current_post);
1412                 } else {
1413                         self::updateThread($parent_id);
1414                 }
1415
1416                 dba::commit();
1417
1418                 /*
1419                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1420                  * This is not perfect - but a workable solution until we found the reason for the problem.
1421                  */
1422                 Term::insertFromTagFieldByItemId($current_post);
1423                 Term::insertFromFileFieldByItemId($current_post);
1424
1425                 if ($item['parent-uri'] === $item['uri']) {
1426                         self::addShadow($current_post);
1427                 } else {
1428                         self::addShadowPost($current_post);
1429                 }
1430
1431                 check_user_notification($current_post);
1432
1433                 if ($notify) {
1434                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1435                 } elseif (!empty($parent) && $parent['origin']) {
1436                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1437                 }
1438
1439                 return $current_post;
1440         }
1441
1442         /**
1443          * @brief Insert a new item content entry
1444          *
1445          * @param array $item The item fields that are to be inserted
1446          */
1447         private static function insertContent(&$item)
1448         {
1449                 $fields = ['uri' => $item['uri'], 'plink' => $item['plink'],
1450                         'uri-plink-hash' => hash('sha1', $item['plink']).hash('sha1', $item['uri'])];
1451
1452                 unset($item['plink']);
1453
1454                 foreach (self::CONTENT_FIELDLIST as $field) {
1455                         if (isset($item[$field])) {
1456                                 $fields[$field] = $item[$field];
1457                                 unset($item[$field]);
1458                         }
1459                 }
1460
1461                 // Do we already have this content?
1462                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $item['uri']]);
1463                 if (DBM::is_result($item_content)) {
1464                         $item['icid'] = $item_content['id'];
1465                         logger('Assigned content for URI '.$item['uri'].' ('.$item['icid'].')');
1466                         return;
1467                 }
1468
1469                 dba::insert('item-content', $fields);
1470
1471                 $item['icid'] = dba::lastInsertId();
1472
1473                 logger('Insert content for URI '.$item['uri'].' ('.$item['icid'].')');
1474
1475         }
1476
1477         /**
1478          * @brief Update existing item content entries
1479          *
1480          * @param array $item The item fields that are to be changed
1481          * @param array $condition The condition for finding the item content entries
1482          */
1483         private static function updateContent($item, $condition)
1484         {
1485                 // We have to select only the fields from the "item-content" table
1486                 $fields = [];
1487                 foreach (self::CONTENT_FIELDLIST as $field) {
1488                         if (isset($item[$field])) {
1489                                 $fields[$field] = $item[$field];
1490                         }
1491                 }
1492
1493                 if (empty($fields)) {
1494                         return;
1495                 }
1496
1497                 logger('Update content for id '.$condition['id']);
1498
1499                 dba::update('item-content', $fields, $condition, true);
1500         }
1501
1502         /**
1503          * @brief Distributes public items to the receivers
1504          *
1505          * @param integer $itemid      Item ID that should be added
1506          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1507          */
1508         public static function distribute($itemid, $signed_text = '')
1509         {
1510                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1511                 $parent = dba::selectFirst('item', ['owner-id'], $condition);
1512                 if (!DBM::is_result($parent)) {
1513                         return;
1514                 }
1515
1516                 // Only distribute public items from native networks
1517                 $condition = ['id' => $itemid, 'uid' => 0,
1518                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1519                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1520                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1521                 if (!DBM::is_result($item)) {
1522                         return;
1523                 }
1524
1525                 unset($item['id']);
1526                 unset($item['parent']);
1527                 unset($item['mention']);
1528                 unset($item['wall']);
1529                 unset($item['origin']);
1530                 unset($item['starred']);
1531
1532                 $users = [];
1533
1534                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1535                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1536                 $contacts = dba::select('contact', ['uid'], $condition);
1537                 while ($contact = dba::fetch($contacts)) {
1538                         $users[$contact['uid']] = $contact['uid'];
1539                 }
1540
1541                 $origin_uid = 0;
1542
1543                 if ($item['uri'] != $item['parent-uri']) {
1544                         $parents = dba::select('item', ['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1545                         while ($parent = dba::fetch($parents)) {
1546                                 $users[$parent['uid']] = $parent['uid'];
1547                                 if ($parent['origin'] && !$item['origin']) {
1548                                         $origin_uid = $parent['uid'];
1549                                 }
1550                         }
1551                 }
1552
1553                 foreach ($users as $uid) {
1554                         if ($origin_uid == $uid) {
1555                                 $item['diaspora_signed_text'] = $signed_text;
1556                         }
1557                         self::storeForUser($itemid, $item, $uid);
1558                 }
1559         }
1560
1561         /**
1562          * @brief Store public items for the receivers
1563          *
1564          * @param integer $itemid Item ID that should be added
1565          * @param array   $item   The item entry that will be stored
1566          * @param integer $uid    The user that will receive the item entry
1567          */
1568         private static function storeForUser($itemid, $item, $uid)
1569         {
1570                 $item['uid'] = $uid;
1571                 $item['origin'] = 0;
1572                 $item['wall'] = 0;
1573                 if ($item['uri'] == $item['parent-uri']) {
1574                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1575                 } else {
1576                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1577                 }
1578
1579                 if (empty($item['contact-id'])) {
1580                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1581                         if (!DBM::is_result($self)) {
1582                                 return;
1583                         }
1584                         $item['contact-id'] = $self['id'];
1585                 }
1586
1587                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1588                         $item['type'] = 'remote-comment';
1589                 } elseif ($item['type'] == 'wall') {
1590                         $item['type'] = 'remote';
1591                 }
1592
1593                 /// @todo Handling of "event-id"
1594
1595                 $notify = false;
1596                 if ($item['uri'] == $item['parent-uri']) {
1597                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1598                         if (DBM::is_result($contact)) {
1599                                 $notify = self::isRemoteSelf($contact, $item);
1600                         }
1601                 }
1602
1603                 $distributed = self::insert($item, false, $notify, true);
1604
1605                 if (!$distributed) {
1606                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1607                 } else {
1608                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1609                 }
1610         }
1611
1612         /**
1613          * @brief Add a shadow entry for a given item id that is a thread starter
1614          *
1615          * We store every public item entry additionally with the user id "0".
1616          * This is used for the community page and for the search.
1617          * It is planned that in the future we will store public item entries only once.
1618          *
1619          * @param integer $itemid Item ID that should be added
1620          */
1621         public static function addShadow($itemid)
1622         {
1623                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network'];
1624                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1625                 $item = dba::selectFirst('item', $fields, $condition);
1626
1627                 if (!DBM::is_result($item)) {
1628                         return;
1629                 }
1630
1631                 // is it already a copy?
1632                 if (($itemid == 0) || ($item['uid'] == 0)) {
1633                         return;
1634                 }
1635
1636                 // Is it a visible public post?
1637                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1638                         return;
1639                 }
1640
1641                 // is it an entry from a connector? Only add an entry for natively connected networks
1642                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1643                         return;
1644                 }
1645
1646                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1647
1648                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
1649                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
1650
1651                         if (!dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1652                                 // Preparing public shadow (removing user specific data)
1653                                 $item['uid'] = 0;
1654                                 unset($item['id']);
1655                                 unset($item['parent']);
1656                                 unset($item['wall']);
1657                                 unset($item['mention']);
1658                                 unset($item['origin']);
1659                                 unset($item['starred']);
1660                                 if ($item['uri'] == $item['parent-uri']) {
1661                                         $item['contact-id'] = Contact::getIdForURL($item['owner-link']);
1662                                 } else {
1663                                         $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1664                                 }
1665
1666                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1667                                         $item['type'] = 'remote-comment';
1668                                 } elseif ($item['type'] == 'wall') {
1669                                         $item['type'] = 'remote';
1670                                 }
1671
1672                                 $public_shadow = self::insert($item, false, false, true);
1673
1674                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1675                         }
1676                 }
1677         }
1678
1679         /**
1680          * @brief Add a shadow entry for a given item id that is a comment
1681          *
1682          * This function does the same like the function above - but for comments
1683          *
1684          * @param integer $itemid Item ID that should be added
1685          */
1686         public static function addShadowPost($itemid)
1687         {
1688                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1689                 if (!DBM::is_result($item)) {
1690                         return;
1691                 }
1692
1693                 // Is it a toplevel post?
1694                 if ($item['id'] == $item['parent']) {
1695                         self::addShadow($itemid);
1696                         return;
1697                 }
1698
1699                 // Is this a shadow entry?
1700                 if ($item['uid'] == 0) {
1701                         return;
1702                 }
1703
1704                 // Is there a shadow parent?
1705                 if (!dba::exists('item', ['uri' => $item['parent-uri'], 'uid' => 0])) {
1706                         return;
1707                 }
1708
1709                 // Is there already a shadow entry?
1710                 if (dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1711                         return;
1712                 }
1713
1714                 // Save "origin" and "parent" state
1715                 $origin = $item['origin'];
1716                 $parent = $item['parent'];
1717
1718                 // Preparing public shadow (removing user specific data)
1719                 $item['uid'] = 0;
1720                 unset($item['id']);
1721                 unset($item['parent']);
1722                 unset($item['wall']);
1723                 unset($item['mention']);
1724                 unset($item['origin']);
1725                 unset($item['starred']);
1726                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1727
1728                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1729                         $item['type'] = 'remote-comment';
1730                 } elseif ($item['type'] == 'wall') {
1731                         $item['type'] = 'remote';
1732                 }
1733
1734                 $public_shadow = self::insert($item, false, false, true);
1735
1736                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1737
1738                 // If this was a comment to a Diaspora post we don't get our comment back.
1739                 // This means that we have to distribute the comment by ourselves.
1740                 if ($origin && dba::exists('item', ['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1741                         self::distribute($public_shadow);
1742                 }
1743         }
1744
1745          /**
1746          * Adds a "lang" specification in a "postopts" element of given $arr,
1747          * if possible and not already present.
1748          * Expects "body" element to exist in $arr.
1749          */
1750         private static function addLanguageInPostopts(&$item)
1751         {
1752                 $postopts = "";
1753
1754                 if (!empty($item['postopts'])) {
1755                         if (strstr($item['postopts'], 'lang=')) {
1756                                 // do not override
1757                                 return;
1758                         }
1759                         $postopts = $item['postopts'];
1760                 }
1761
1762                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1763
1764                 $languages = (new Text_LanguageDetect())->detect($naked_body, 3);
1765
1766                 if (sizeof($languages) > 0) {
1767                         if ($postopts != '') {
1768                                 $postopts .= '&'; // arbitrary separator, to be reviewed
1769                         }
1770
1771                         $postopts .= 'lang=';
1772                         $sep = "";
1773
1774                         foreach ($languages as $language => $score) {
1775                                 $postopts .= $sep . $language . ";" . $score;
1776                                 $sep = ':';
1777                         }
1778                         $item['postopts'] = $postopts;
1779                 }
1780         }
1781
1782         /**
1783          * @brief Creates an unique guid out of a given uri
1784          *
1785          * @param string $uri uri of an item entry
1786          * @param string $host hostname for the GUID prefix
1787          * @return string unique guid
1788          */
1789         public static function guidFromUri($uri, $host)
1790         {
1791                 // Our regular guid routine is using this kind of prefix as well
1792                 // We have to avoid that different routines could accidentally create the same value
1793                 $parsed = parse_url($uri);
1794
1795                 // We use a hash of the hostname as prefix for the guid
1796                 $guid_prefix = hash("crc32", $host);
1797
1798                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1799                 unset($parsed["scheme"]);
1800
1801                 // Glue it together to be able to make a hash from it
1802                 $host_id = implode("/", $parsed);
1803
1804                 // We could use any hash algorithm since it isn't a security issue
1805                 $host_hash = hash("ripemd128", $host_id);
1806
1807                 return $guid_prefix.$host_hash;
1808         }
1809
1810         /**
1811          * generate an unique URI
1812          *
1813          * @param integer $uid User id
1814          * @param string $guid An existing GUID (Otherwise it will be generated)
1815          *
1816          * @return string
1817          */
1818         public static function newURI($uid, $guid = "")
1819         {
1820                 if ($guid == "") {
1821                         $guid = get_guid(32);
1822                 }
1823
1824                 $hostname = self::getApp()->get_hostname();
1825
1826                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
1827
1828                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
1829
1830                 return $uri;
1831         }
1832
1833         /**
1834          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1835          *
1836          * This can be used to filter for inactive contacts.
1837          * Only do this for public postings to avoid privacy problems, since poco data is public.
1838          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1839          *
1840          * @param array $arr Contains the just posted item record
1841          */
1842         private static function updateContact($arr)
1843         {
1844                 // Unarchive the author
1845                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1846                 if (DBM::is_result($contact)) {
1847                         Contact::unmarkForArchival($contact);
1848                 }
1849
1850                 // Unarchive the contact if it's not our own contact
1851                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1852                 if (DBM::is_result($contact)) {
1853                         Contact::unmarkForArchival($contact);
1854                 }
1855
1856                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1857
1858                 // Is it a forum? Then we don't care about the rules from above
1859                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1860                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1861                                 $update = true;
1862                         }
1863                 }
1864
1865                 if ($update) {
1866                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1867                                 ['id' => $arr['contact-id']]);
1868                 }
1869                 // Now do the same for the system wide contacts with uid=0
1870                 if (!$arr['private']) {
1871                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1872                                 ['id' => $arr['owner-id']]);
1873
1874                         if ($arr['owner-id'] != $arr['author-id']) {
1875                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1876                                         ['id' => $arr['author-id']]);
1877                         }
1878                 }
1879         }
1880
1881         public static function setHashtags(&$item)
1882         {
1883
1884                 $tags = get_tags($item["body"]);
1885
1886                 // No hashtags?
1887                 if (!count($tags)) {
1888                         return false;
1889                 }
1890
1891                 // This sorting is important when there are hashtags that are part of other hashtags
1892                 // Otherwise there could be problems with hashtags like #test and #test2
1893                 rsort($tags);
1894
1895                 $URLSearchString = "^\[\]";
1896
1897                 // All hashtags should point to the home server if "local_tags" is activated
1898                 if (Config::get('system', 'local_tags')) {
1899                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1900                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
1901
1902                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1903                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
1904                 }
1905
1906                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1907                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1908                         function ($match) {
1909                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1910                         }, $item["body"]);
1911
1912                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1913                         function ($match) {
1914                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1915                         }, $item["body"]);
1916
1917                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1918                         function ($match) {
1919                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1920                         }, $item["body"]);
1921
1922                 // Repair recursive urls
1923                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1924                                 "&num;$2", $item["body"]);
1925
1926                 foreach ($tags as $tag) {
1927                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
1928                                 continue;
1929                         }
1930
1931                         $basetag = str_replace('_',' ',substr($tag,1));
1932
1933                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1934
1935                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
1936
1937                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
1938                                 if (strlen($item["tag"])) {
1939                                         $item["tag"] = ','.$item["tag"];
1940                                 }
1941                                 $item["tag"] = $newtag.$item["tag"];
1942                         }
1943                 }
1944
1945                 // Convert back the masked hashtags
1946                 $item["body"] = str_replace("&num;", "#", $item["body"]);
1947         }
1948
1949         public static function getGuidById($id)
1950         {
1951                 $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
1952                 if (DBM::is_result($item)) {
1953                         return $item['guid'];
1954                 } else {
1955                         return '';
1956                 }
1957         }
1958
1959         public static function getIdAndNickByGuid($guid, $uid = 0)
1960         {
1961                 $nick = "";
1962                 $id = 0;
1963
1964                 if ($uid == 0) {
1965                         $uid == local_user();
1966                 }
1967
1968                 // Does the given user have this item?
1969                 if ($uid) {
1970                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1971                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1972                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1973                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
1974                         if (DBM::is_result($item)) {
1975                                 $id = $item["id"];
1976                                 $nick = $item["nickname"];
1977                         }
1978                 }
1979
1980                 // Or is it anywhere on the server?
1981                 if ($nick == "") {
1982                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1983                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1984                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1985                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
1986                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
1987                                         AND NOT `item`.`private` AND `item`.`wall`
1988                                         AND `item`.`guid` = ?", $guid);
1989                         if (DBM::is_result($item)) {
1990                                 $id = $item["id"];
1991                                 $nick = $item["nickname"];
1992                         }
1993                 }
1994                 return ["nick" => $nick, "id" => $id];
1995         }
1996
1997         /**
1998          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1999          * @param int $uid
2000          * @param int $item_id
2001          * @return bool true if item was deleted, else false
2002          */
2003         private static function tagDeliver($uid, $item_id)
2004         {
2005                 $mention = false;
2006
2007                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
2008                 if (!DBM::is_result($user)) {
2009                         return;
2010                 }
2011
2012                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
2013                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
2014
2015                 $item = dba::selectFirst('item', [], ['id' => $item_id]);
2016                 if (!DBM::is_result($item)) {
2017                         return;
2018                 }
2019
2020                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
2021
2022                 /*
2023                  * Diaspora uses their own hardwired link URL in @-tags
2024                  * instead of the one we supply with webfinger
2025                  */
2026                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
2027
2028                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2029                 if ($cnt) {
2030                         foreach ($matches as $mtch) {
2031                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
2032                                         $mention = true;
2033                                         logger('mention found: ' . $mtch[2]);
2034                                 }
2035                         }
2036                 }
2037
2038                 if (!$mention) {
2039                         if (($community_page || $prvgroup) &&
2040                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2041                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2042                                 // delete it!
2043                                 logger("no-mention top-level post to community or private group. delete.");
2044                                 dba::delete('item', ['id' => $item_id]);
2045                                 return true;
2046                         }
2047                         return;
2048                 }
2049
2050                 $arr = ['item' => $item, 'user' => $user];
2051
2052                 Addon::callHooks('tagged', $arr);
2053
2054                 if (!$community_page && !$prvgroup) {
2055                         return;
2056                 }
2057
2058                 /*
2059                  * tgroup delivery - setup a second delivery chain
2060                  * prevent delivery looping - only proceed
2061                  * if the message originated elsewhere and is a top-level post
2062                  */
2063                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2064                         return;
2065                 }
2066
2067                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2068                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2069                 if (!DBM::is_result($self)) {
2070                         return;
2071                 }
2072
2073                 $owner_id = Contact::getIdForURL($self['url']);
2074
2075                 // also reset all the privacy bits to the forum default permissions
2076
2077                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2078
2079                 $forum_mode = ($prvgroup ? 2 : 1);
2080
2081                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2082                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
2083                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
2084                 dba::update('item', $fields, ['id' => $item_id]);
2085
2086                 self::updateThread($item_id);
2087
2088                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2089         }
2090
2091         public static function isRemoteSelf($contact, &$datarray)
2092         {
2093                 $a = get_app();
2094
2095                 if (!$contact['remote_self']) {
2096                         return false;
2097                 }
2098
2099                 // Prevent the forwarding of posts that are forwarded
2100                 if ($datarray["extid"] == NETWORK_DFRN) {
2101                         logger('Already forwarded', LOGGER_DEBUG);
2102                         return false;
2103                 }
2104
2105                 // Prevent to forward already forwarded posts
2106                 if ($datarray["app"] == $a->get_hostname()) {
2107                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2108                         return false;
2109                 }
2110
2111                 // Only forward posts
2112                 if ($datarray["verb"] != ACTIVITY_POST) {
2113                         logger('No post', LOGGER_DEBUG);
2114                         return false;
2115                 }
2116
2117                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2118                         logger('Not public', LOGGER_DEBUG);
2119                         return false;
2120                 }
2121
2122                 $datarray2 = $datarray;
2123                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2124                 if ($contact['remote_self'] == 2) {
2125                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2126                                         ['uid' => $contact['uid'], 'self' => true]);
2127                         if (DBM::is_result($self)) {
2128                                 $datarray['contact-id'] = $self["id"];
2129
2130                                 $datarray['owner-name'] = $self["name"];
2131                                 $datarray['owner-link'] = $self["url"];
2132                                 $datarray['owner-avatar'] = $self["thumb"];
2133
2134                                 $datarray['author-name']   = $datarray['owner-name'];
2135                                 $datarray['author-link']   = $datarray['owner-link'];
2136                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2137
2138                                 unset($datarray['created']);
2139                                 unset($datarray['edited']);
2140
2141                                 unset($datarray['network']);
2142                                 unset($datarray['owner-id']);
2143                                 unset($datarray['author-id']);
2144                         }
2145
2146                         if ($contact['network'] != NETWORK_FEED) {
2147                                 $datarray["guid"] = get_guid(32);
2148                                 unset($datarray["plink"]);
2149                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2150                                 $datarray["parent-uri"] = $datarray["uri"];
2151                                 $datarray["thr-parent"] = $datarray["uri"];
2152                                 $datarray["extid"] = NETWORK_DFRN;
2153                                 $urlpart = parse_url($datarray2['author-link']);
2154                                 $datarray["app"] = $urlpart["host"];
2155                         } else {
2156                                 $datarray['private'] = 0;
2157                         }
2158                 }
2159
2160                 if ($contact['network'] != NETWORK_FEED) {
2161                         // Store the original post
2162                         $result = self::insert($datarray2, false, false);
2163                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2164                 } else {
2165                         $datarray["app"] = "Feed";
2166                         $result = true;
2167                 }
2168
2169                 // Trigger automatic reactions for addons
2170                 $datarray['api_source'] = true;
2171
2172                 // We have to tell the hooks who we are - this really should be improved
2173                 $_SESSION["authenticated"] = true;
2174                 $_SESSION["uid"] = $contact['uid'];
2175
2176                 return $result;
2177         }
2178
2179         /**
2180          *
2181          * @param string $s
2182          * @param int    $uid
2183          * @param array  $item
2184          * @param int    $cid
2185          * @return string
2186          */
2187         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2188         {
2189                 if (Config::get('system', 'disable_embedded')) {
2190                         return $s;
2191                 }
2192
2193                 logger('check for photos', LOGGER_DEBUG);
2194                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2195
2196                 $orig_body = $s;
2197                 $new_body = '';
2198
2199                 $img_start = strpos($orig_body, '[img');
2200                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2201                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2202
2203                 while (($img_st_close !== false) && ($img_len !== false)) {
2204                         $img_st_close++; // make it point to AFTER the closing bracket
2205                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2206
2207                         logger('found photo ' . $image, LOGGER_DEBUG);
2208
2209                         if (stristr($image, $site . '/photo/')) {
2210                                 // Only embed locally hosted photos
2211                                 $replace = false;
2212                                 $i = basename($image);
2213                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2214                                 $x = strpos($i, '-');
2215
2216                                 if ($x) {
2217                                         $res = substr($i, $x + 1);
2218                                         $i = substr($i, 0, $x);
2219                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2220                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2221                                         if (DBM::is_result($photo)) {
2222                                                 /*
2223                                                  * Check to see if we should replace this photo link with an embedded image
2224                                                  * 1. No need to do so if the photo is public
2225                                                  * 2. If there's a contact-id provided, see if they're in the access list
2226                                                  *    for the photo. If so, embed it.
2227                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2228                                                  *    permissions, regardless of order but first check to see if they're an exact
2229                                                  *    match to save some processing overhead.
2230                                                  */
2231                                                 if (self::hasPermissions($photo)) {
2232                                                         if ($cid) {
2233                                                                 $recips = self::enumeratePermissions($photo);
2234                                                                 if (in_array($cid, $recips)) {
2235                                                                         $replace = true;
2236                                                                 }
2237                                                         } elseif ($item) {
2238                                                                 if (self::samePermissions($item, $photo)) {
2239                                                                         $replace = true;
2240                                                                 }
2241                                                         }
2242                                                 }
2243                                                 if ($replace) {
2244                                                         $data = $photo['data'];
2245                                                         $type = $photo['type'];
2246
2247                                                         // If a custom width and height were specified, apply before embedding
2248                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2249                                                                 logger('scaling photo', LOGGER_DEBUG);
2250
2251                                                                 $width = intval($match[1]);
2252                                                                 $height = intval($match[2]);
2253
2254                                                                 $Image = new Image($data, $type);
2255                                                                 if ($Image->isValid()) {
2256                                                                         $Image->scaleDown(max($width, $height));
2257                                                                         $data = $Image->asString();
2258                                                                         $type = $Image->getType();
2259                                                                 }
2260                                                         }
2261
2262                                                         logger('replacing photo', LOGGER_DEBUG);
2263                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2264                                                         logger('replaced: ' . $image, LOGGER_DATA);
2265                                                 }
2266                                         }
2267                                 }
2268                         }
2269
2270                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2271                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2272                         if ($orig_body === false) {
2273                                 $orig_body = '';
2274                         }
2275
2276                         $img_start = strpos($orig_body, '[img');
2277                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2278                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2279                 }
2280
2281                 $new_body = $new_body . $orig_body;
2282
2283                 return $new_body;
2284         }
2285
2286         private static function hasPermissions($obj)
2287         {
2288                 return (
2289                         (
2290                                 x($obj, 'allow_cid')
2291                         ) || (
2292                                 x($obj, 'allow_gid')
2293                         ) || (
2294                                 x($obj, 'deny_cid')
2295                         ) || (
2296                                 x($obj, 'deny_gid')
2297                         )
2298                 );
2299         }
2300
2301         private static function samePermissions($obj1, $obj2)
2302         {
2303                 // first part is easy. Check that these are exactly the same.
2304                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2305                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2306                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2307                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2308                         return true;
2309                 }
2310
2311                 // This is harder. Parse all the permissions and compare the resulting set.
2312                 $recipients1 = self::enumeratePermissions($obj1);
2313                 $recipients2 = self::enumeratePermissions($obj2);
2314                 sort($recipients1);
2315                 sort($recipients2);
2316
2317                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2318                 return ($recipients1 == $recipients2);
2319         }
2320
2321         // returns an array of contact-ids that are allowed to see this object
2322         private static function enumeratePermissions($obj)
2323         {
2324                 $allow_people = expand_acl($obj['allow_cid']);
2325                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2326                 $deny_people  = expand_acl($obj['deny_cid']);
2327                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2328                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2329                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2330                 $recipients   = array_diff($recipients, $deny);
2331                 return $recipients;
2332         }
2333
2334         public static function getFeedTags($item)
2335         {
2336                 $ret = [];
2337                 $matches = false;
2338                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2339                 if ($cnt) {
2340                         for ($x = 0; $x < $cnt; $x ++) {
2341                                 if ($matches[1][$x]) {
2342                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2343                                 }
2344                         }
2345                 }
2346                 $matches = false;
2347                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2348                 if ($cnt) {
2349                         for ($x = 0; $x < $cnt; $x ++) {
2350                                 if ($matches[1][$x]) {
2351                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2352                                 }
2353                         }
2354                 }
2355                 return $ret;
2356         }
2357
2358         public static function expire($uid, $days, $network = "", $force = false)
2359         {
2360                 if (!$uid || ($days < 1)) {
2361                         return;
2362                 }
2363
2364                 /*
2365                  * $expire_network_only = save your own wall posts
2366                  * and just expire conversations started by others
2367                  */
2368                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
2369                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
2370
2371                 if ($network != "") {
2372                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
2373
2374                         /*
2375                          * There is an index "uid_network_received" but not "uid_network_created"
2376                          * This avoids the creation of another index just for one purpose.
2377                          * And it doesn't really matter wether to look at "received" or "created"
2378                          */
2379                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2380                 } else {
2381                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2382                 }
2383
2384                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
2385                         WHERE `uid` = %d $range
2386                         AND `id` = `parent`
2387                         $sql_extra
2388                         AND `deleted` = 0",
2389                         intval($uid),
2390                         intval($days)
2391                 );
2392
2393                 if (!DBM::is_result($r)) {
2394                         return;
2395                 }
2396
2397                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
2398
2399                 // Forcing expiring of items - but not notes and marked items
2400                 if ($force) {
2401                         $expire_items = true;
2402                 }
2403
2404                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
2405                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
2406                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
2407
2408                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2409
2410                 foreach ($r as $item) {
2411
2412                         // don't expire filed items
2413
2414                         if (strpos($item['file'],'[') !== false) {
2415                                 continue;
2416                         }
2417
2418                         // Only expire posts, not photos and photo comments
2419
2420                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
2421                                 continue;
2422                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
2423                                 continue;
2424                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
2425                                 continue;
2426                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
2427                                 continue;
2428                         }
2429
2430                         self::deleteById($item['id'], PRIORITY_LOW);
2431                 }
2432         }
2433
2434         public static function firstPostDate($uid, $wall = false)
2435         {
2436                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2437                 $params = ['order' => ['created' => false]];
2438                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2439                 if (DBM::is_result($thread)) {
2440                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2441                 }
2442                 return false;
2443         }
2444
2445         /**
2446          * @brief add/remove activity to an item
2447          *
2448          * Toggle activities as like,dislike,attend of an item
2449          *
2450          * @param string $item_id
2451          * @param string $verb
2452          *              Activity verb. One of
2453          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2454          *                      attendno, unattendno, attendmaybe, unattendmaybe
2455          * @hook 'post_local_end'
2456          *              array $arr
2457          *                      'post_id' => ID of posted item
2458          */
2459         public static function performLike($item_id, $verb)
2460         {
2461                 if (!local_user() && !remote_user()) {
2462                         return false;
2463                 }
2464
2465                 switch ($verb) {
2466                         case 'like':
2467                         case 'unlike':
2468                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
2469                                 $activity = ACTIVITY_LIKE;
2470                                 break;
2471                         case 'dislike':
2472                         case 'undislike':
2473                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
2474                                 $activity = ACTIVITY_DISLIKE;
2475                                 break;
2476                         case 'attendyes':
2477                         case 'unattendyes':
2478                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
2479                                 $activity = ACTIVITY_ATTEND;
2480                                 break;
2481                         case 'attendno':
2482                         case 'unattendno':
2483                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
2484                                 $activity = ACTIVITY_ATTENDNO;
2485                                 break;
2486                         case 'attendmaybe':
2487                         case 'unattendmaybe':
2488                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
2489                                 $activity = ACTIVITY_ATTENDMAYBE;
2490                                 break;
2491                         default:
2492                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2493                                 return false;
2494                 }
2495
2496                 // Enable activity toggling instead of on/off
2497                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2498
2499                 logger('like: verb ' . $verb . ' item ' . $item_id);
2500
2501                 $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2502                 if (!DBM::is_result($item)) {
2503                         logger('like: unknown item ' . $item_id);
2504                         return false;
2505                 }
2506
2507                 $uid = $item['uid'];
2508                 if (($uid == 0) && local_user()) {
2509                         $uid = local_user();
2510                 }
2511
2512                 if (!can_write_wall($uid)) {
2513                         logger('like: unable to write on wall ' . $uid);
2514                         return false;
2515                 }
2516
2517                 // Retrieves the local post owner
2518                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2519                 if (!DBM::is_result($owner_self_contact)) {
2520                         logger('like: unknown owner ' . $uid);
2521                         return false;
2522                 }
2523
2524                 // Retrieve the current logged in user's public contact
2525                 $author_id = public_contact();
2526
2527                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
2528                 if (!DBM::is_result($author_contact)) {
2529                         logger('like: unknown author ' . $author_id);
2530                         return false;
2531                 }
2532
2533                 // Contact-id is the uid-dependant author contact
2534                 if (local_user() == $uid) {
2535                         $item_contact_id = $owner_self_contact['id'];
2536                         $item_contact = $owner_self_contact;
2537                 } else {
2538                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2539                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2540                         if (!DBM::is_result($item_contact)) {
2541                                 logger('like: unknown item contact ' . $item_contact_id);
2542                                 return false;
2543                         }
2544                 }
2545
2546                 // Look for an existing verb row
2547                 // event participation are essentially radio toggles. If you make a subsequent choice,
2548                 // we need to eradicate your first choice.
2549                 if ($event_verb_flag) {
2550                         $verbs = "'" . dbesc(ACTIVITY_ATTEND) . "', '" . dbesc(ACTIVITY_ATTENDNO) . "', '" . dbesc(ACTIVITY_ATTENDMAYBE) . "'";
2551                 } else {
2552                         $verbs = "'".dbesc($activity)."'";
2553                 }
2554
2555                 /// @todo This query is expected to be a performance eater due to the "OR" - it has to be changed totally
2556                 $existing_like = q("SELECT `id`, `guid`, `verb` FROM `item`
2557                         WHERE `verb` IN ($verbs)
2558                         AND `deleted` = 0
2559                         AND `author-id` = %d
2560                         AND `uid` = %d
2561                         AND (`parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s')
2562                         LIMIT 1",
2563                         intval($author_contact['id']),
2564                         intval($item['uid']),
2565                         dbesc($item_id), dbesc($item_id), dbesc($item['uri'])
2566                 );
2567
2568                 // If it exists, mark it as deleted
2569                 if (DBM::is_result($existing_like)) {
2570                         $like_item = $existing_like[0];
2571
2572                         // Already voted, undo it
2573                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2574                         dba::update('item', $fields, ['id' => $like_item['id']]);
2575
2576                         // Clean up the Diaspora signatures for this like
2577                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
2578                         // if it had been enabled in the past
2579                         dba::delete('sign', ['iid' => $like_item['id']]);
2580
2581                         $like_item_id = $like_item['id'];
2582                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
2583
2584                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2585                                 return true;
2586                         }
2587                 }
2588
2589                 // Verb is "un-something", just trying to delete existing entries
2590                 if (strpos($verb, 'un') === 0) {
2591                         return true;
2592                 }
2593
2594                 // Else or if event verb different from existing row, create a new item row
2595                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2596                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2597                         $post_type = L10n::t('event');
2598                 }
2599                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2600                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2601                 $body = $item['body'];
2602
2603                 $obj = <<< EOT
2604
2605                 <object>
2606                         <type>$objtype</type>
2607                         <local>1</local>
2608                         <id>{$item['uri']}</id>
2609                         <link>$link</link>
2610                         <title></title>
2611                         <content>$body</content>
2612                 </object>
2613 EOT;
2614
2615                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2616                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2617                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2618
2619                 $new_item = [
2620                         'guid'          => get_guid(32),
2621                         'uri'           => self::newURI($item['uid']),
2622                         'uid'           => $item['uid'],
2623                         'contact-id'    => $item_contact_id,
2624                         'type'          => 'activity',
2625                         'wall'          => $item['wall'],
2626                         'origin'        => 1,
2627                         'gravity'       => GRAVITY_LIKE,
2628                         'parent'        => $item['id'],
2629                         'parent-uri'    => $item['uri'],
2630                         'thr-parent'    => $item['uri'],
2631                         'owner-id'      => $item['owner-id'],
2632                         'owner-name'    => $item['owner-name'],
2633                         'owner-link'    => $item['owner-link'],
2634                         'owner-avatar'  => $item['owner-avatar'],
2635                         'author-id'     => $author_contact['id'],
2636                         'author-name'   => $author_contact['name'],
2637                         'author-link'   => $author_contact['url'],
2638                         'author-avatar' => $author_contact['thumb'],
2639                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2640                         'verb'          => $activity,
2641                         'object-type'   => $objtype,
2642                         'object'        => $obj,
2643                         'allow_cid'     => $item['allow_cid'],
2644                         'allow_gid'     => $item['allow_gid'],
2645                         'deny_cid'      => $item['deny_cid'],
2646                         'deny_gid'      => $item['deny_gid'],
2647                         'visible'       => 1,
2648                         'unseen'        => 1,
2649                 ];
2650
2651                 $new_item_id = self::insert($new_item);
2652
2653                 // If the parent item isn't visible then set it to visible
2654                 if (!$item['visible']) {
2655                         self::update(['visible' => true], ['id' => $item['id']]);
2656                 }
2657
2658                 // Save the author information for the like in case we need to relay to Diaspora
2659                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2660
2661                 $new_item['id'] = $new_item_id;
2662
2663                 Addon::callHooks('post_local_end', $new_item);
2664
2665                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2666
2667                 return true;
2668         }
2669
2670         private static function addThread($itemid, $onlyshadow = false)
2671         {
2672                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2673                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2674                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2675                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2676                 $item = dba::selectFirst('item', $fields, $condition);
2677
2678                 if (!DBM::is_result($item)) {
2679                         return;
2680                 }
2681
2682                 $item['iid'] = $itemid;
2683
2684                 if (!$onlyshadow) {
2685                         $result = dba::insert('thread', $item);
2686
2687                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2688                 }
2689         }
2690
2691         private static function updateThread($itemid, $setmention = false)
2692         {
2693                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
2694                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2695                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
2696                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2697
2698                 $item = dba::selectFirst('item', $fields, $condition);
2699                 if (!DBM::is_result($item)) {
2700                         return;
2701                 }
2702
2703                 if ($setmention) {
2704                         $item["mention"] = 1;
2705                 }
2706
2707                 $sql = "";
2708
2709                 $fields = [];
2710
2711                 foreach ($item as $field => $data) {
2712                         if (!in_array($field, ["guid"])) {
2713                                 $fields[$field] = $data;
2714                         }
2715                 }
2716
2717                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2718
2719                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2720         }
2721
2722         private static function deleteThread($itemid, $itemuri = "")
2723         {
2724                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2725                 if (!DBM::is_result($item)) {
2726                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2727                         return;
2728                 }
2729
2730                 // Using dba::delete at this time could delete the associated item entries
2731                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2732
2733                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2734
2735                 if ($itemuri != "") {
2736                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2737                         if (!dba::exists('item', $condition)) {
2738                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2739                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2740                         }
2741                 }
2742         }
2743 }