src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Content\Text;
  11 use Friendica\Core\Addon;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\PConfig;
  15 use Friendica\Core\System;
  16 use Friendica\Core\Worker;
  17 use Friendica\Database\DBM;
  18 use Friendica\Model\Contact;
  19 use Friendica\Model\Conversation;
  20 use Friendica\Model\Group;
  21 use Friendica\Model\Term;
  22 use Friendica\Object\Image;
  23 use Friendica\Protocol\Diaspora;
  24 use Friendica\Protocol\OStatus;
  25 use Friendica\Util\DateTimeFormat;
  26 use Friendica\Util\XML;
  27 use Friendica\Util\Lock;
  28 use dba;
  29 use Text_LanguageDetect;
  30
  31 require_once 'boot.php';
  32 require_once 'include/items.php';
  33 require_once 'include/text.php';
  34
  35 class Item extends BaseObject
  36 {
  37         // Field list that is used to display the items
  38         const DISPLAY_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network',
  39                         'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  40                         'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach',
  41                         'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  42                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  43                         'author-id', 'author-link', 'author-name', 'author-avatar',
  44                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar',
  45                         'contact-id', 'contact-link', 'contact-name', 'contact-avatar',
  46                         'writable', 'self', 'cid', 'alias',
  47                         'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  48                         'event-summary', 'event-desc', 'event-location', 'event-type',
  49                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
  50
  51         // Field list that is used to deliver items via the protocols
  52         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  53                         'created', 'edited', 'verb', 'object-type', 'object', 'target',
  54                         'private', 'title', 'body', 'location', 'coord', 'app',
  55                         'attach', 'tag', 'bookmark', 'deleted', 'extid',
  56                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  57                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  58                         'signed_text', 'signature', 'signer'];
  59
  60         // Field list for "item-content" table that is mixed with the item table
  61         const CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  62                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  63                         'object-type', 'object', 'target-type', 'target', 'plink'];
  64
  65         // All fields in the item table
  66         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  67                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid',
  68                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  69                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  70                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  71                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  72                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  73                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  74                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  75                         'author-id', 'author-link', 'author-name', 'author-avatar',
  76                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  77
  78         /**
  79          * @brief Fetch a single item row
  80          *
  81          * @param mixed $stmt statement object
  82          * @return array current row
  83          */
  84         public static function fetch($stmt)
  85         {
  86                 $row = dba::fetch($stmt);
  87
  88                 // Fetch data from the item-content table whenever there is content there
  89                 foreach (self::CONTENT_FIELDLIST as $field) {
  90                         if (empty($row[$field]) && !empty($row['item-' . $field])) {
  91                                 $row[$field] = $row['item-' . $field];
  92                         }
  93                         unset($row['item-' . $field]);
  94                 }
  95
  96                 // We prefer the data from the user's contact over the public one
  97                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
  98                         ($row['author-link'] == $row['contact-link'])) {
  99                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 100                                 $row['author-avatar'] = $row['contact-avatar'];
 101                         }
 102                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 103                                 $row['author-name'] = $row['contact-name'];
 104                         }
 105                 }
 106
 107                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 108                         ($row['owner-link'] == $row['contact-link'])) {
 109                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 110                                 $row['owner-avatar'] = $row['contact-avatar'];
 111                         }
 112                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 113                                 $row['owner-name'] = $row['contact-name'];
 114                         }
 115                 }
 116
 117                 // We can always comment on posts from these networks
 118                 if (isset($row['writable']) && !empty($row['network']) &&
 119                         in_array($row['network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
 120                         $row['writable'] = true;
 121                 }
 122
 123                 return $row;
 124         }
 125
 126         /**
 127          * @brief Fills an array with data from an item query
 128          *
 129          * @param object $stmt statement object
 130          * @return array Data array
 131          */
 132         public static function inArray($stmt, $do_close = true) {
 133                 if (is_bool($stmt)) {
 134                         return $stmt;
 135                 }
 136
 137                 $data = [];
 138                 while ($row = self::fetch($stmt)) {
 139                         $data[] = $row;
 140                 }
 141                 if ($do_close) {
 142                         dba::close($stmt);
 143                 }
 144                 return $data;
 145         }
 146
 147         /**
 148          * @brief Check if item data exists
 149          *
 150          * @param array $condition array of fields for condition
 151          *
 152          * @return boolean Are there rows for that condition?
 153          */
 154         public static function exists($condition) {
 155                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 156
 157                 if (is_bool($stmt)) {
 158                         $retval = $stmt;
 159                 } else {
 160                         $retval = (dba::num_rows($stmt) > 0);
 161                 }
 162
 163                 dba::close($stmt);
 164
 165                 return $retval;
 166         }
 167
 168         /**
 169          * Retrieve a single record from the item table for a given user and returns it in an associative array
 170          *
 171          * @brief Retrieve a single record from a table
 172          * @param integer $uid User ID
 173          * @param array  $fields
 174          * @param array  $condition
 175          * @param array  $params
 176          * @return bool|array
 177          * @see dba::select
 178          */
 179         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 180         {
 181                 $params['uid'] = $uid;
 182
 183                 if (empty($selected)) {
 184                         $selected = Item::DISPLAY_FIELDLIST;
 185                 }
 186
 187                 return self::selectFirst($selected, $condition, $params);
 188         }
 189
 190         /**
 191          * @brief Select rows from the item table for a given user
 192          *
 193          * @param integer $uid User ID
 194          * @param array  $selected  Array of selected fields, empty for all
 195          * @param array  $condition Array of fields for condition
 196          * @param array  $params    Array of several parameters
 197          *
 198          * @return boolean|object
 199          */
 200         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 201         {
 202                 $params['uid'] = $uid;
 203
 204                 if (empty($selected)) {
 205                         $selected = Item::DISPLAY_FIELDLIST;
 206                 }
 207
 208                 return self::select($selected, $condition, $params);
 209         }
 210
 211         /**
 212          * Retrieve a single record from the item table and returns it in an associative array
 213          *
 214          * @brief Retrieve a single record from a table
 215          * @param array  $fields
 216          * @param array  $condition
 217          * @param array  $params
 218          * @return bool|array
 219          * @see dba::select
 220          */
 221         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 222         {
 223                 $params['limit'] = 1;
 224
 225                 $result = self::select($fields, $condition, $params);
 226
 227                 if (is_bool($result)) {
 228                         return $result;
 229                 } else {
 230                         $row = self::fetch($result);
 231                         dba::close($result);
 232                         return $row;
 233                 }
 234         }
 235
 236         /**
 237          * @brief Select rows from the item table
 238          *
 239          * @param array  $selected  Array of selected fields, empty for all
 240          * @param array  $condition Array of fields for condition
 241          * @param array  $params    Array of several parameters
 242          *
 243          * @return boolean|object
 244          */
 245         public static function select(array $selected = [], array $condition = [], $params = [])
 246         {
 247                 $uid = 0;
 248                 $usermode = false;
 249
 250                 if (isset($params['uid'])) {
 251                         $uid = $params['uid'];
 252                         $usermode = true;
 253                 }
 254
 255                 $fields = self::fieldlist($selected);
 256
 257                 $select_fields = self::constructSelectFields($fields, $selected);
 258
 259                 $condition_string = dba::buildCondition($condition);
 260
 261                 $condition_string = self::addTablesToFields($condition_string, $fields);
 262
 263                 if ($usermode) {
 264                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 265                 }
 266
 267                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 268
 269                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false);
 270
 271                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 272
 273                 return dba::p($sql, $condition);
 274         }
 275
 276         /**
 277          * @brief Select rows from the starting post in the item table
 278          *
 279          * @param integer $uid User ID
 280          * @param array  $fields    Array of selected fields, empty for all
 281          * @param array  $condition Array of fields for condition
 282          * @param array  $params    Array of several parameters
 283          *
 284          * @return boolean|object
 285          */
 286         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 287         {
 288                 $params['uid'] = $uid;
 289
 290                 if (empty($selected)) {
 291                         $selected = Item::DISPLAY_FIELDLIST;
 292                 }
 293
 294                 return self::selectThread($selected, $condition, $params);
 295         }
 296
 297         /**
 298          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 299          *
 300          * @brief Retrieve a single record from a table
 301          * @param integer $uid User ID
 302          * @param array  $selected
 303          * @param array  $condition
 304          * @param array  $params
 305          * @return bool|array
 306          * @see dba::select
 307          */
 308         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 309         {
 310                 $params['uid'] = $uid;
 311
 312                 if (empty($selected)) {
 313                         $selected = Item::DISPLAY_FIELDLIST;
 314                 }
 315
 316                 return self::selectFirstThread($selected, $condition, $params);
 317         }
 318
 319         /**
 320          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 321          *
 322          * @brief Retrieve a single record from a table
 323          * @param array  $fields
 324          * @param array  $condition
 325          * @param array  $params
 326          * @return bool|array
 327          * @see dba::select
 328          */
 329         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 330         {
 331                 $params['limit'] = 1;
 332                 $result = self::selectThread($fields, $condition, $params);
 333
 334                 if (is_bool($result)) {
 335                         return $result;
 336                 } else {
 337                         $row = self::fetch($result);
 338                         dba::close($result);
 339                         return $row;
 340                 }
 341         }
 342
 343         /**
 344          * @brief Select rows from the starting post in the item table
 345          *
 346          * @param array  $selected  Array of selected fields, empty for all
 347          * @param array  $condition Array of fields for condition
 348          * @param array  $params    Array of several parameters
 349          *
 350          * @return boolean|object
 351          */
 352         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 353         {
 354                 $uid = 0;
 355                 $usermode = false;
 356
 357                 if (isset($params['uid'])) {
 358                         $uid = $params['uid'];
 359                         $usermode = true;
 360                 }
 361
 362                 $fields = self::fieldlist($selected);
 363
 364                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 365                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 366                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 367                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 368
 369                 $select_fields = self::constructSelectFields($fields, $selected);
 370
 371                 $condition_string = dba::buildCondition($condition);
 372
 373                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 374                 $condition_string = self::addTablesToFields($condition_string, $fields);
 375
 376                 if ($usermode) {
 377                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 378                 }
 379
 380                 $param_string = dba::buildParameter($params);
 381                 $param_string = self::addTablesToFields($param_string, $threadfields);
 382                 $param_string = self::addTablesToFields($param_string, $fields);
 383
 384                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true);
 385
 386                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 387
 388                 return dba::p($sql, $condition);
 389         }
 390
 391         /**
 392          * @brief Returns a list of fields that are associated with the item table
 393          *
 394          * @return array field list
 395          */
 396         private static function fieldlist($selected)
 397         {
 398                 $fields = [];
 399
 400                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 401                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 402                         'created', 'edited', 'commented', 'received', 'changed', 'postopts',
 403                         'resource-id', 'event-id', 'tag', 'attach', 'inform',
 404                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 405                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 406                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 407                         'id' => 'item_id', 'network', 'icid'];
 408
 409                 $fields['item-content'] = self::CONTENT_FIELDLIST;
 410
 411                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 412                         'thumb' => 'author-avatar', 'nick' => 'author-nick'];
 413
 414                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 415                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick'];
 416
 417                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 418                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 419                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 420
 421                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 422
 423                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 424
 425                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 426                         'start' => 'event-start','finish' => 'event-finish',
 427                         'summary' => 'event-summary','desc' => 'event-desc',
 428                         'location' => 'event-location', 'type' => 'event-type',
 429                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 430                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 431
 432                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 433
 434                 return $fields;
 435         }
 436
 437         /**
 438          * @brief Returns SQL condition for the "select" functions
 439          *
 440          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 441          *
 442          * @return string SQL condition
 443          */
 444         private static function condition($thread_mode)
 445         {
 446                 if ($thread_mode) {
 447                         $master_table = "`thread`";
 448                 } else {
 449                         $master_table = "`item`";
 450                 }
 451                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 452         }
 453
 454         /**
 455          * @brief Returns all needed "JOIN" commands for the "select" functions
 456          *
 457          * @param integer $uid User ID
 458          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 459          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 460          *
 461          * @return string The SQL joins for the "select" functions
 462          */
 463         private static function constructJoins($uid, $sql_commands, $thread_mode)
 464         {
 465                 if ($thread_mode) {
 466                         $master_table = "`thread`";
 467                         $master_table_key = "`thread`.`iid`";
 468                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 469                 } else {
 470                         $master_table = "`item`";
 471                         $master_table_key = "`item`.`id`";
 472                         $joins = '';
 473                 }
 474
 475                 $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 476                         AND NOT `contact`.`blocked`
 477                         AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 478                         OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 479                         STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 480                         STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 481                         LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 482                         CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 483
 484                 if (strpos($sql_commands, "`group_member`.") !== false) {
 485                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 486                 }
 487
 488                 if (strpos($sql_commands, "`user`.") !== false) {
 489                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 490                 }
 491
 492                 if (strpos($sql_commands, "`event`.") !== false) {
 493                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 494                 }
 495
 496                 if (strpos($sql_commands, "`sign`.") !== false) {
 497                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 498                 }
 499
 500                 if (strpos($sql_commands, "`item-content`.") !== false) {
 501                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
 502                 }
 503
 504                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 505                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 506                 }
 507
 508                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 509                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 510                 }
 511
 512                 return $joins;
 513         }
 514
 515         /**
 516          * @brief Add the field list for the "select" functions
 517          *
 518          * @param array $fields The field definition array
 519          * @param array $selected The array with the selected fields from the "select" functions
 520          *
 521          * @return string The field list
 522          */
 523         private static function constructSelectFields($fields, $selected)
 524         {
 525                 $selection = [];
 526                 foreach ($fields as $table => $table_fields) {
 527                         foreach ($table_fields as $field => $select) {
 528                                 if (empty($selected) || in_array($select, $selected)) {
 529                                         if (in_array($select, self::CONTENT_FIELDLIST)) {
 530                                                 $selection[] = "`item`.`".$select."` AS `item-" . $select . "`";
 531                                         }
 532                                         if (is_int($field)) {
 533                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 534                                         } else {
 535                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 536                                         }
 537                                 }
 538                         }
 539                 }
 540                 return implode(", ", $selection);
 541         }
 542
 543         /**
 544          * @brief add table definition to fields in an SQL query
 545          *
 546          * @param string $query SQL query
 547          * @param array $fields The field definition array
 548          *
 549          * @return string the changed SQL query
 550          */
 551         private static function addTablesToFields($query, $fields)
 552         {
 553                 foreach ($fields as $table => $table_fields) {
 554                         foreach ($table_fields as $alias => $field) {
 555                                 if (is_int($alias)) {
 556                                         $replace_field = $field;
 557                                 } else {
 558                                         $replace_field = $alias;
 559                                 }
 560
 561                                 $search = "/([^\.])`" . $field . "`/i";
 562                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 563                                 $query = preg_replace($search, $replace, $query);
 564                         }
 565                 }
 566                 return $query;
 567         }
 568
 569         /**
 570          * @brief Update existing item entries
 571          *
 572          * @param array $fields The fields that are to be changed
 573          * @param array $condition The condition for finding the item entries
 574          *
 575          * In the future we may have to change permissions as well.
 576          * Then we had to add the user id as third parameter.
 577          *
 578          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 579          *
 580          * @return integer|boolean number of affected rows - or "false" if there was an error
 581          */
 582         public static function update(array $fields, array $condition)
 583         {
 584                 if (empty($condition) || empty($fields)) {
 585                         return false;
 586                 }
 587
 588                 // To ensure the data integrity we do it in an transaction
 589                 dba::transaction();
 590
 591                 // We cannot simply expand the condition to check for origin entries
 592                 // The condition needn't to be a simple array but could be a complex condition.
 593                 // And we have to execute this query before the update to ensure to fetch the same data.
 594                 $items = dba::select('item', ['id', 'origin', 'uri', 'plink'], $condition);
 595
 596                 $content_fields = [];
 597                 foreach (self::CONTENT_FIELDLIST as $field) {
 598                         if (isset($fields[$field])) {
 599                                 $content_fields[$field] = $fields[$field];
 600                                 unset($fields[$field]);
 601                         }
 602                 }
 603
 604                 if (!empty($fields)) {
 605                         $success = dba::update('item', $fields, $condition);
 606
 607                         if (!$success) {
 608                                 dba::close($items);
 609                                 dba::rollback();
 610                                 return false;
 611                         }
 612                 }
 613
 614                 // When there is no content for the "old" item table, this will count the fetched items
 615                 $rows = dba::affected_rows();
 616
 617                 while ($item = dba::fetch($items)) {
 618                         if (!empty($item['plink'])) {
 619                                 $content_fields['plink'] =  $item['plink'];
 620                         }
 621                         self::updateContent($content_fields, ['uri' => $item['uri']]);
 622                         Term::insertFromTagFieldByItemId($item['id']);
 623                         Term::insertFromFileFieldByItemId($item['id']);
 624                         self::updateThread($item['id']);
 625
 626                         // We only need to notfiy others when it is an original entry from us.
 627                         // Only call the notifier when the item has some content relevant change.
 628                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 629                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 630                         }
 631                 }
 632
 633                 dba::close($items);
 634                 dba::commit();
 635                 return $rows;
 636         }
 637
 638         /**
 639          * @brief Delete an item and notify others about it - if it was ours
 640          *
 641          * @param array $condition The condition for finding the item entries
 642          * @param integer $priority Priority for the notification
 643          */
 644         public static function delete($condition, $priority = PRIORITY_HIGH)
 645         {
 646                 $items = dba::select('item', ['id'], $condition);
 647                 while ($item = dba::fetch($items)) {
 648                         self::deleteById($item['id'], $priority);
 649                 }
 650                 dba::close($items);
 651         }
 652
 653         /**
 654          * @brief Delete an item for an user and notify others about it - if it was ours
 655          *
 656          * @param array $condition The condition for finding the item entries
 657          * @param integer $uid User who wants to delete this item
 658          */
 659         public static function deleteForUser($condition, $uid)
 660         {
 661                 if ($uid == 0) {
 662                         return;
 663                 }
 664
 665                 $items = dba::select('item', ['id', 'uid'], $condition);
 666                 while ($item = dba::fetch($items)) {
 667                         // "Deleting" global items just means hiding them
 668                         if ($item['uid'] == 0) {
 669                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 670                         } elseif ($item['uid'] == $uid) {
 671                                 self::deleteById($item['id'], PRIORITY_HIGH);
 672                         } else {
 673                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 674                         }
 675                 }
 676                 dba::close($items);
 677         }
 678
 679         /**
 680          * @brief Delete an item and notify others about it - if it was ours
 681          *
 682          * @param integer $item_id Item ID that should be delete
 683          * @param integer $priority Priority for the notification
 684          *
 685          * @return boolean success
 686          */
 687         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 688         {
 689                 // locate item to be deleted
 690                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 691                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 692                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 693                 $item = dba::selectFirst('item', $fields, ['id' => $item_id]);
 694                 if (!DBM::is_result($item)) {
 695                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 696                         return false;
 697                 }
 698
 699                 if ($item['deleted']) {
 700                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 701                         return false;
 702                 }
 703
 704                 $parent = dba::selectFirst('item', ['origin'], ['id' => $item['parent']]);
 705                 if (!DBM::is_result($parent)) {
 706                         $parent = ['origin' => false];
 707                 }
 708
 709                 // clean up categories and tags so they don't end up as orphans
 710
 711                 $matches = false;
 712                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 713                 if ($cnt) {
 714                         foreach ($matches as $mtch) {
 715                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 716                         }
 717                 }
 718
 719                 $matches = false;
 720
 721                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 722                 if ($cnt) {
 723                         foreach ($matches as $mtch) {
 724                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 725                         }
 726                 }
 727
 728                 /*
 729                  * If item is a link to a photo resource, nuke all the associated photos
 730                  * (visitors will not have photo resources)
 731                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 732                  * generate a resource-id and therefore aren't intimately linked to the item.
 733                  */
 734                 if (strlen($item['resource-id'])) {
 735                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 736                 }
 737
 738                 // If item is a link to an event, delete the event.
 739                 if (intval($item['event-id'])) {
 740                         Event::delete($item['event-id']);
 741                 }
 742
 743                 // If item has attachments, drop them
 744                 foreach (explode(", ", $item['attach']) as $attach) {
 745                         preg_match("|attach/(\d+)|", $attach, $matches);
 746                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 747                 }
 748
 749                 // Delete tags that had been attached to other items
 750                 self::deleteTagsFromItem($item);
 751
 752                 // Set the item to "deleted"
 753                 // This erasing of item content is superfluous for items with a matching item-content.
 754                 // But for the next time we will still have old content in the item table.
 755                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow(),
 756                         'body' => '', 'title' => '', 'content-warning' => '', 'rendered-hash' => '', 'rendered-html' => '',
 757                         'object' => '', 'target' => '', 'tag' => '', 'postopts' => '', 'attach' => '', 'file' => ''];
 758                 dba::update('item', $item_fields, ['id' => $item['id']]);
 759
 760                 Term::insertFromTagFieldByItemId($item['id']);
 761                 Term::insertFromFileFieldByItemId($item['id']);
 762                 self::deleteThread($item['id'], $item['parent-uri']);
 763
 764                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 765                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 766                 }
 767
 768                 // If it's the parent of a comment thread, kill all the kids
 769                 if ($item['id'] == $item['parent']) {
 770                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 771                 }
 772
 773                 // Is it our comment and/or our thread?
 774                 if ($item['origin'] || $parent['origin']) {
 775
 776                         // When we delete the original post we will delete all existing copies on the server as well
 777                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 778
 779                         // send the notification upstream/downstream
 780                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 781                 } elseif ($item['uid'] != 0) {
 782
 783                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 784                         $global_item = dba::selectFirst('item', ['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 785                         if (DBM::is_result($global_item)) {
 786                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 787                         }
 788                 }
 789
 790                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 791
 792                 return true;
 793         }
 794
 795         private static function deleteTagsFromItem($item)
 796         {
 797                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 798                         return;
 799                 }
 800
 801                 $xo = XML::parseString($item["object"], false);
 802                 $xt = XML::parseString($item["target"], false);
 803
 804                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 805                         return;
 806                 }
 807
 808                 $i = dba::selectFirst('item', ['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 809                 if (!DBM::is_result($i)) {
 810                         return;
 811                 }
 812
 813                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 814                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 815                 $author_copy = $item["origin"];
 816
 817                 if (($owner_remove && $author_copy) || !$owner_remove) {
 818                         return;
 819                 }
 820
 821                 $tags = explode(',', $i["tag"]);
 822                 $newtags = [];
 823                 if (count($tags)) {
 824                         foreach ($tags as $tag) {
 825                                 if (trim($tag) !== trim($xo->body)) {
 826                                        $newtags[] = trim($tag);
 827                                 }
 828                         }
 829                 }
 830                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 831         }
 832
 833         private static function guid($item, $notify)
 834         {
 835                 $guid = notags(trim($item['guid']));
 836
 837                 if (!empty($guid)) {
 838                         return $guid;
 839                 }
 840
 841                 if ($notify) {
 842                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 843                         // We add the hash of our own host because our host is the original creator of the post.
 844                         $prefix_host = get_app()->get_hostname();
 845                 } else {
 846                         $prefix_host = '';
 847
 848                         // We are only storing the post so we create a GUID from the original hostname.
 849                         if (!empty($item['author-link'])) {
 850                                 $parsed = parse_url($item['author-link']);
 851                                 if (!empty($parsed['host'])) {
 852                                         $prefix_host = $parsed['host'];
 853                                 }
 854                         }
 855
 856                         if (empty($prefix_host) && !empty($item['plink'])) {
 857                                 $parsed = parse_url($item['plink']);
 858                                 if (!empty($parsed['host'])) {
 859                                         $prefix_host = $parsed['host'];
 860                                 }
 861                         }
 862
 863                         if (empty($prefix_host) && !empty($item['uri'])) {
 864                                 $parsed = parse_url($item['uri']);
 865                                 if (!empty($parsed['host'])) {
 866                                         $prefix_host = $parsed['host'];
 867                                 }
 868                         }
 869
 870                         // Is it in the format data@host.tld? - Used for mail contacts
 871                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 872                                 $mailparts = explode('@', $item['author-link']);
 873                                 $prefix_host = array_pop($mailparts);
 874                         }
 875                 }
 876
 877                 if (!empty($item['plink'])) {
 878                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 879                 } elseif (!empty($item['uri'])) {
 880                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 881                 } else {
 882                         $guid = get_guid(32, hash('crc32', $prefix_host));
 883                 }
 884
 885                 return $guid;
 886         }
 887
 888         private static function contactId($item)
 889         {
 890                 $contact_id = (int)$item["contact-id"];
 891
 892                 if (!empty($contact_id)) {
 893                         return $contact_id;
 894                 }
 895                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 896                 /*
 897                  * First we are looking for a suitable contact that matches with the author of the post
 898                  * This is done only for comments
 899                  */
 900                 if ($item['parent-uri'] != $item['uri']) {
 901                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 902                 }
 903
 904                 // If not present then maybe the owner was found
 905                 if ($contact_id == 0) {
 906                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 907                 }
 908
 909                 // Still missing? Then use the "self" contact of the current user
 910                 if ($contact_id == 0) {
 911                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 912                         if (DBM::is_result($self)) {
 913                                 $contact_id = $self["id"];
 914                         }
 915                 }
 916                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 917
 918                 return $contact_id;
 919         }
 920
 921         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 922         {
 923                 $a = get_app();
 924
 925                 // If it is a posting where users should get notifications, then define it as wall posting
 926                 if ($notify) {
 927                         $item['wall'] = 1;
 928                         $item['type'] = 'wall';
 929                         $item['origin'] = 1;
 930                         $item['network'] = NETWORK_DFRN;
 931                         $item['protocol'] = PROTOCOL_DFRN;
 932
 933                         if (is_int($notify)) {
 934                                 $priority = $notify;
 935                         } else {
 936                                 $priority = PRIORITY_HIGH;
 937                         }
 938                 } else {
 939                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 940                 }
 941
 942                 $item['guid'] = self::guid($item, $notify);
 943                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
 944
 945                 // Store conversation data
 946                 $item = Conversation::insert($item);
 947
 948                 /*
 949                  * If a Diaspora signature structure was passed in, pull it out of the
 950                  * item array and set it aside for later storage.
 951                  */
 952
 953                 $dsprsig = null;
 954                 if (x($item, 'dsprsig')) {
 955                         $encoded_signature = $item['dsprsig'];
 956                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
 957                         unset($item['dsprsig']);
 958                 }
 959
 960                 if (!empty($item['diaspora_signed_text'])) {
 961                         $diaspora_signed_text = $item['diaspora_signed_text'];
 962                         unset($item['diaspora_signed_text']);
 963                 } else {
 964                         $diaspora_signed_text = '';
 965                 }
 966
 967                 // Converting the plink
 968                 /// @TODO Check if this is really still needed
 969                 if ($item['network'] == NETWORK_OSTATUS) {
 970                         if (isset($item['plink'])) {
 971                                 $item['plink'] = OStatus::convertHref($item['plink']);
 972                         } elseif (isset($item['uri'])) {
 973                                 $item['plink'] = OStatus::convertHref($item['uri']);
 974                         }
 975                 }
 976
 977                 if (!empty($item['thr-parent'])) {
 978                         $item['parent-uri'] = $item['thr-parent'];
 979                 }
 980
 981                 $item['type'] = defaults($item, 'type', 'remote');
 982
 983                 if (isset($item['gravity'])) {
 984                         $item['gravity'] = intval($item['gravity']);
 985                 } elseif ($item['parent-uri'] === $item['uri']) {
 986                         $item['gravity'] = GRAVITY_PARENT;
 987                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
 988                         $item['gravity'] = GRAVITY_COMMENT;
 989                 } elseif ($item['type'] == 'activity') {
 990                         $item['gravity'] = GRAVITY_ACTIVITY;
 991                 } else {
 992                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
 993                         logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
 994                 }
 995
 996                 $uid = intval($item['uid']);
 997
 998                 // check for create date and expire time
 999                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1000
1001                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
1002                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1003                         $expire_interval = $user['expire'];
1004                 }
1005
1006                 if (($expire_interval > 0) && !empty($item['created'])) {
1007                         $expire_date = time() - ($expire_interval * 86400);
1008                         $created_date = strtotime($item['created']);
1009                         if ($created_date < $expire_date) {
1010                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
1011                                 return 0;
1012                         }
1013                 }
1014
1015                 /*
1016                  * Do we already have this item?
1017                  * We have to check several networks since Friendica posts could be repeated
1018                  * via OStatus (maybe Diasporsa as well)
1019                  */
1020                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
1021                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1022                                 trim($item['uri']), $item['uid'],
1023                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
1024                         $existing = dba::selectFirst('item', ['id', 'network'], $condition);
1025                         if (DBM::is_result($existing)) {
1026                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1027                                 if ($uid != 0) {
1028                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
1029                                 }
1030
1031                                 return $existing["id"];
1032                         }
1033                 }
1034
1035                 self::addLanguageInPostopts($item);
1036
1037                 $item['wall']          = intval(defaults($item, 'wall', 0));
1038                 $item['extid']         = trim(defaults($item, 'extid', ''));
1039                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1040                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1041                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1042                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1043                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1044                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1045                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1046                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1047                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1048                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1049                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1050                 $item['title']         = trim(defaults($item, 'title', ''));
1051                 $item['location']      = trim(defaults($item, 'location', ''));
1052                 $item['coord']         = trim(defaults($item, 'coord', ''));
1053                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1054                 $item['deleted']       = 0;
1055                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1056                 $item['verb']          = trim(defaults($item, 'verb', ''));
1057                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1058                 $item['object']        = trim(defaults($item, 'object', ''));
1059                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1060                 $item['target']        = trim(defaults($item, 'target', ''));
1061                 $item['plink']         = trim(defaults($item, 'plink', ''));
1062                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1063                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1064                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1065                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1066                 $item['private']       = intval(defaults($item, 'private', 0));
1067                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1068                 $item['body']          = trim(defaults($item, 'body', ''));
1069                 $item['tag']           = trim(defaults($item, 'tag', ''));
1070                 $item['attach']        = trim(defaults($item, 'attach', ''));
1071                 $item['app']           = trim(defaults($item, 'app', ''));
1072                 $item['origin']        = intval(defaults($item, 'origin', 0));
1073                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1074                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1075                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1076                 $item['inform']        = trim(defaults($item, 'inform', ''));
1077                 $item['file']          = trim(defaults($item, 'file', ''));
1078
1079                 // When there is no content then we don't post it
1080                 if ($item['body'].$item['title'] == '') {
1081                         logger('No body, no title.');
1082                         return 0;
1083                 }
1084
1085                 // Items cannot be stored before they happen ...
1086                 if ($item['created'] > DateTimeFormat::utcNow()) {
1087                         $item['created'] = DateTimeFormat::utcNow();
1088                 }
1089
1090                 // We haven't invented time travel by now.
1091                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1092                         $item['edited'] = DateTimeFormat::utcNow();
1093                 }
1094
1095                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1096                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1097                 }
1098
1099                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1100
1101                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1102                 $item["contact-id"] = self::contactId($item);
1103
1104                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1105                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1106
1107                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1108
1109                 if (Contact::isBlocked($item["author-id"])) {
1110                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1111                         return 0;
1112                 }
1113
1114                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1115                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1116
1117                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1118
1119                 if (Contact::isBlocked($item["owner-id"])) {
1120                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1121                         return 0;
1122                 }
1123
1124                 // These fields aren't stored anymore in the item table, they are fetched upon request
1125                 unset($item['author-link']);
1126                 unset($item['author-name']);
1127                 unset($item['author-avatar']);
1128
1129                 unset($item['owner-link']);
1130                 unset($item['owner-name']);
1131                 unset($item['owner-avatar']);
1132
1133                 if ($item['network'] == NETWORK_PHANTOM) {
1134                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1135
1136                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1137                         if (!empty($contact['network'])) {
1138                                 $item['network'] = $contact["network"];
1139                         } else {
1140                                 $item['network'] = NETWORK_DFRN;
1141                         }
1142                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1143                 }
1144
1145                 // Checking if there is already an item with the same guid
1146                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1147                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1148                 if (self::exists($condition)) {
1149                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1150                         return 0;
1151                 }
1152
1153                 // Check for hashtags in the body and repair or add hashtag links
1154                 self::setHashtags($item);
1155
1156                 $item['thr-parent'] = $item['parent-uri'];
1157
1158                 $notify_type = '';
1159                 $allow_cid = '';
1160                 $allow_gid = '';
1161                 $deny_cid  = '';
1162                 $deny_gid  = '';
1163
1164                 if ($item['parent-uri'] === $item['uri']) {
1165                         $parent_id = 0;
1166                         $parent_deleted = 0;
1167                         $allow_cid = $item['allow_cid'];
1168                         $allow_gid = $item['allow_gid'];
1169                         $deny_cid  = $item['deny_cid'];
1170                         $deny_gid  = $item['deny_gid'];
1171                         $notify_type = 'wall-new';
1172                 } else {
1173                         // find the parent and snarf the item id and ACLs
1174                         // and anything else we need to inherit
1175
1176                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1177                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1178                                 'wall', 'private', 'forum_mode', 'origin'];
1179                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1180                         $params = ['order' => ['id' => false]];
1181                         $parent = dba::selectFirst('item', $fields, $condition, $params);
1182
1183                         if (DBM::is_result($parent)) {
1184                                 // is the new message multi-level threaded?
1185                                 // even though we don't support it now, preserve the info
1186                                 // and re-attach to the conversation parent.
1187
1188                                 if ($parent['uri'] != $parent['parent-uri']) {
1189                                         $item['parent-uri'] = $parent['parent-uri'];
1190
1191                                         $condition = ['uri' => $item['parent-uri'],
1192                                                 'parent-uri' => $item['parent-uri'],
1193                                                 'uid' => $item['uid']];
1194                                         $params = ['order' => ['id' => false]];
1195                                         $toplevel_parent = dba::selectFirst('item', $fields, $condition, $params);
1196
1197                                         if (DBM::is_result($toplevel_parent)) {
1198                                                 $parent = $toplevel_parent;
1199                                         }
1200                                 }
1201
1202                                 $parent_id      = $parent['id'];
1203                                 $parent_deleted = $parent['deleted'];
1204                                 $allow_cid      = $parent['allow_cid'];
1205                                 $allow_gid      = $parent['allow_gid'];
1206                                 $deny_cid       = $parent['deny_cid'];
1207                                 $deny_gid       = $parent['deny_gid'];
1208                                 $item['wall']    = $parent['wall'];
1209                                 $notify_type    = 'comment-new';
1210
1211                                 /*
1212                                  * If the parent is private, force privacy for the entire conversation
1213                                  * This differs from the above settings as it subtly allows comments from
1214                                  * email correspondents to be private even if the overall thread is not.
1215                                  */
1216                                 if ($parent['private']) {
1217                                         $item['private'] = $parent['private'];
1218                                 }
1219
1220                                 /*
1221                                  * Edge case. We host a public forum that was originally posted to privately.
1222                                  * The original author commented, but as this is a comment, the permissions
1223                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1224                                  */
1225                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1226                                         $item['private'] = 0;
1227                                 }
1228
1229                                 // If its a post from myself then tag the thread as "mention"
1230                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1231                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1232                                 if (DBM::is_result($user)) {
1233                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1234                                         $self_id = Contact::getIdForURL($self, 0, true);
1235                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1236                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1237                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1238                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1239                                         }
1240                                 }
1241                         } else {
1242                                 /*
1243                                  * Allow one to see reply tweets from status.net even when
1244                                  * we don't have or can't see the original post.
1245                                  */
1246                                 if ($force_parent) {
1247                                         logger('$force_parent=true, reply converted to top-level post.');
1248                                         $parent_id = 0;
1249                                         $item['parent-uri'] = $item['uri'];
1250                                         $item['gravity'] = GRAVITY_PARENT;
1251                                 } else {
1252                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1253                                         return 0;
1254                                 }
1255
1256                                 $parent_deleted = 0;
1257                         }
1258                 }
1259
1260                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1261                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1262                 if (self::exists($condition)) {
1263                         logger('duplicated item with the same uri found. '.print_r($item,true));
1264                         return 0;
1265                 }
1266
1267                 // On Friendica and Diaspora the GUID is unique
1268                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1269                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1270                         if (self::exists($condition)) {
1271                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1272                                 return 0;
1273                         }
1274                 } else {
1275                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1276                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1277                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1278                         if (self::exists($condition)) {
1279                                 logger('duplicated item with the same body found. '.print_r($item,true));
1280                                 return 0;
1281                         }
1282                 }
1283
1284                 // Is this item available in the global items (with uid=0)?
1285                 if ($item["uid"] == 0) {
1286                         $item["global"] = true;
1287
1288                         // Set the global flag on all items if this was a global item entry
1289                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1290                 } else {
1291                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1292                 }
1293
1294                 // ACL settings
1295                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1296                         $private = 1;
1297                 } else {
1298                         $private = $item['private'];
1299                 }
1300
1301                 $item["allow_cid"] = $allow_cid;
1302                 $item["allow_gid"] = $allow_gid;
1303                 $item["deny_cid"] = $deny_cid;
1304                 $item["deny_gid"] = $deny_gid;
1305                 $item["private"] = $private;
1306                 $item["deleted"] = $parent_deleted;
1307
1308                 // Fill the cache field
1309                 put_item_in_cache($item);
1310
1311                 if ($notify) {
1312                         Addon::callHooks('post_local', $item);
1313                 } else {
1314                         Addon::callHooks('post_remote', $item);
1315                 }
1316
1317                 // This array field is used to trigger some automatic reactions
1318                 // It is mainly used in the "post_local" hook.
1319                 unset($item['api_source']);
1320
1321                 if (x($item, 'cancel')) {
1322                         logger('post cancelled by addon.');
1323                         return 0;
1324                 }
1325
1326                 /*
1327                  * Check for already added items.
1328                  * There is a timing issue here that sometimes creates double postings.
1329                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1330                  */
1331                 if ($item["uid"] == 0) {
1332                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1333                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1334                                 return 0;
1335                         }
1336                 }
1337
1338                 logger('' . print_r($item,true), LOGGER_DATA);
1339
1340                 // We are doing this outside of the transaction to avoid timing problems
1341                 self::insertContent($item);
1342
1343                 dba::transaction();
1344                 $ret = dba::insert('item', $item);
1345
1346                 // When the item was successfully stored we fetch the ID of the item.
1347                 if (DBM::is_result($ret)) {
1348                         $current_post = dba::lastInsertId();
1349                 } else {
1350                         // This can happen - for example - if there are locking timeouts.
1351                         dba::rollback();
1352
1353                         // Store the data into a spool file so that we can try again later.
1354
1355                         // At first we restore the Diaspora signature that we removed above.
1356                         if (isset($encoded_signature)) {
1357                                 $item['dsprsig'] = $encoded_signature;
1358                         }
1359
1360                         // Now we store the data in the spool directory
1361                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1362                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1363
1364                         $spoolpath = get_spoolpath();
1365                         if ($spoolpath != "") {
1366                                 $spool = $spoolpath.'/'.$file;
1367                                 file_put_contents($spool, json_encode($item));
1368                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1369                         }
1370                         return 0;
1371                 }
1372
1373                 if ($current_post == 0) {
1374                         // This is one of these error messages that never should occur.
1375                         logger("couldn't find created item - we better quit now.");
1376                         dba::rollback();
1377                         return 0;
1378                 }
1379
1380                 // How much entries have we created?
1381                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1382                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1383
1384                 if ($entries > 1) {
1385                         // There are duplicates. We delete our just created entry.
1386                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1387
1388                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1389                         dba::delete('item', ['id' => $current_post]);
1390                         dba::commit();
1391                         return 0;
1392                 } elseif ($entries == 0) {
1393                         // This really should never happen since we quit earlier if there were problems.
1394                         logger("Something is terribly wrong. We haven't found our created entry.");
1395                         dba::rollback();
1396                         return 0;
1397                 }
1398
1399                 logger('created item '.$current_post);
1400                 self::updateContact($item);
1401
1402                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1403                         $parent_id = $current_post;
1404                 }
1405
1406                 // Set parent id
1407                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1408
1409                 $item['id'] = $current_post;
1410                 $item['parent'] = $parent_id;
1411
1412                 // update the commented timestamp on the parent
1413                 // Only update "commented" if it is really a comment
1414                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1415                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1416                 } else {
1417                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1418                 }
1419
1420                 if ($dsprsig) {
1421                         /*
1422                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1423                          * We can check for this condition when we decode and encode the stuff again.
1424                          */
1425                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1426                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1427                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1428                         }
1429
1430                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1431                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1432                 }
1433
1434                 if (!empty($diaspora_signed_text)) {
1435                         // Formerly we stored the signed text, the signature and the author in different fields.
1436                         // We now store the raw data so that we are more flexible.
1437                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1438                 }
1439
1440                 $deleted = self::tagDeliver($item['uid'], $current_post);
1441
1442                 /*
1443                  * current post can be deleted if is for a community page and no mention are
1444                  * in it.
1445                  */
1446                 if (!$deleted && !$dontcache) {
1447                         $posted_item = dba::selectFirst('item', [], ['id' => $current_post]);
1448                         if (DBM::is_result($posted_item)) {
1449                                 if ($notify) {
1450                                         Addon::callHooks('post_local_end', $posted_item);
1451                                 } else {
1452                                         Addon::callHooks('post_remote_end', $posted_item);
1453                                 }
1454                         } else {
1455                                 logger('new item not found in DB, id ' . $current_post);
1456                         }
1457                 }
1458
1459                 if ($item['parent-uri'] === $item['uri']) {
1460                         self::addThread($current_post);
1461                 } else {
1462                         self::updateThread($parent_id);
1463                 }
1464
1465                 dba::commit();
1466
1467                 /*
1468                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1469                  * This is not perfect - but a workable solution until we found the reason for the problem.
1470                  */
1471                 Term::insertFromTagFieldByItemId($current_post);
1472                 Term::insertFromFileFieldByItemId($current_post);
1473
1474                 if ($item['parent-uri'] === $item['uri']) {
1475                         self::addShadow($current_post);
1476                 } else {
1477                         self::addShadowPost($current_post);
1478                 }
1479
1480                 check_user_notification($current_post);
1481
1482                 if ($notify) {
1483                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1484                 } elseif (!empty($parent) && $parent['origin']) {
1485                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1486                 }
1487
1488                 return $current_post;
1489         }
1490
1491         /**
1492          * @brief Insert a new item content entry
1493          *
1494          * @param array $item The item fields that are to be inserted
1495          */
1496         private static function insertContent(&$item)
1497         {
1498                 $fields = ['uri' => $item['uri'], 'plink' => $item['plink'],
1499                         'uri-plink-hash' => hash('sha1', $item['plink']).hash('sha1', $item['uri'])];
1500
1501                 foreach (self::CONTENT_FIELDLIST as $field) {
1502                         if (isset($item[$field])) {
1503                                 $fields[$field] = $item[$field];
1504                                 unset($item[$field]);
1505                         }
1506                 }
1507
1508                 // To avoid timing problems, we are using locks.
1509                 $locked = Lock::set('item_insert_content');
1510                 if (!$locked) {
1511                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1512                 }
1513
1514                 // Do we already have this content?
1515                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $item['uri']]);
1516                 if (DBM::is_result($item_content)) {
1517                         $item['icid'] = $item_content['id'];
1518                         logger('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1519                 } elseif (dba::insert('item-content', $fields)) {
1520                         $item['icid'] = dba::lastInsertId();
1521                         logger('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1522                 } else {
1523                         // By setting the ICID value through the worker we should avoid timing problems.
1524                         // When the locking works, this shouldn't be needed. But better be prepared.
1525                         Worker::add(PRIORITY_HIGH, 'SetItemContentID', $item['uri']);
1526                         logger('Could not insert content for URI ' . $item['uri'] . ' - trying asynchronously');
1527                 }
1528                 if ($locked) {
1529                         Lock::remove('item_insert_content');
1530                 }
1531         }
1532
1533         /**
1534          * @brief Set the item content id for a given URI
1535          *
1536          * @param string $uri The item URI
1537          */
1538         public static function setICIDforURI($uri)
1539         {
1540                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $uri]);
1541                 if (DBM::is_result($item_content)) {
1542                         dba::update('item', ['icid' => $item_content['id']], ['icid' => 0, 'uri' => $uri]);
1543                         logger('Asynchronously set item content id for URI ' . $uri . ' (' . $item_content['id'] . ') - Affected: '. (int)dba::affected_rows());
1544                 } else {
1545                         logger('No item-content found for URI ' . $uri);
1546                 }
1547         }
1548
1549         /**
1550          * @brief Update existing item content entries
1551          *
1552          * @param array $item The item fields that are to be changed
1553          * @param array $condition The condition for finding the item content entries
1554          */
1555         private static function updateContent($item, $condition)
1556         {
1557                 // We have to select only the fields from the "item-content" table
1558                 $fields = [];
1559                 foreach (self::CONTENT_FIELDLIST as $field) {
1560                         if (isset($item[$field])) {
1561                                 $fields[$field] = $item[$field];
1562                         }
1563                 }
1564
1565                 if (empty($fields)) {
1566                         return;
1567                 }
1568
1569                 if (!empty($item['plink'])) {
1570                         $fields['uri-plink-hash'] = hash('sha1', $item['plink']) . hash('sha1', $condition['uri']);
1571                 } else {
1572                         // Ensure that we don't delete the plink
1573                         unset($fields['plink']);
1574                 }
1575
1576                 logger('Update content for URI ' . $condition['uri']);
1577
1578                 dba::update('item-content', $fields, $condition, true);
1579         }
1580
1581         /**
1582          * @brief Distributes public items to the receivers
1583          *
1584          * @param integer $itemid      Item ID that should be added
1585          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1586          */
1587         public static function distribute($itemid, $signed_text = '')
1588         {
1589                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1590                 $parent = dba::selectFirst('item', ['owner-id'], $condition);
1591                 if (!DBM::is_result($parent)) {
1592                         return;
1593                 }
1594
1595                 // Only distribute public items from native networks
1596                 $condition = ['id' => $itemid, 'uid' => 0,
1597                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1598                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1599                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1600                 if (!DBM::is_result($item)) {
1601                         return;
1602                 }
1603
1604                 unset($item['id']);
1605                 unset($item['parent']);
1606                 unset($item['mention']);
1607                 unset($item['wall']);
1608                 unset($item['origin']);
1609                 unset($item['starred']);
1610
1611                 $users = [];
1612
1613                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1614                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1615                 $contacts = dba::select('contact', ['uid'], $condition);
1616                 while ($contact = dba::fetch($contacts)) {
1617                         $users[$contact['uid']] = $contact['uid'];
1618                 }
1619
1620                 $origin_uid = 0;
1621
1622                 if ($item['uri'] != $item['parent-uri']) {
1623                         $parents = dba::select('item', ['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1624                         while ($parent = dba::fetch($parents)) {
1625                                 $users[$parent['uid']] = $parent['uid'];
1626                                 if ($parent['origin'] && !$item['origin']) {
1627                                         $origin_uid = $parent['uid'];
1628                                 }
1629                         }
1630                 }
1631
1632                 foreach ($users as $uid) {
1633                         if ($origin_uid == $uid) {
1634                                 $item['diaspora_signed_text'] = $signed_text;
1635                         }
1636                         self::storeForUser($itemid, $item, $uid);
1637                 }
1638         }
1639
1640         /**
1641          * @brief Store public items for the receivers
1642          *
1643          * @param integer $itemid Item ID that should be added
1644          * @param array   $item   The item entry that will be stored
1645          * @param integer $uid    The user that will receive the item entry
1646          */
1647         private static function storeForUser($itemid, $item, $uid)
1648         {
1649                 $item['uid'] = $uid;
1650                 $item['origin'] = 0;
1651                 $item['wall'] = 0;
1652                 if ($item['uri'] == $item['parent-uri']) {
1653                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1654                 } else {
1655                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1656                 }
1657
1658                 if (empty($item['contact-id'])) {
1659                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1660                         if (!DBM::is_result($self)) {
1661                                 return;
1662                         }
1663                         $item['contact-id'] = $self['id'];
1664                 }
1665
1666                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1667                         $item['type'] = 'remote-comment';
1668                 } elseif ($item['type'] == 'wall') {
1669                         $item['type'] = 'remote';
1670                 }
1671
1672                 /// @todo Handling of "event-id"
1673
1674                 $notify = false;
1675                 if ($item['uri'] == $item['parent-uri']) {
1676                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1677                         if (DBM::is_result($contact)) {
1678                                 $notify = self::isRemoteSelf($contact, $item);
1679                         }
1680                 }
1681
1682                 $distributed = self::insert($item, false, $notify, true);
1683
1684                 if (!$distributed) {
1685                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1686                 } else {
1687                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1688                 }
1689         }
1690
1691         /**
1692          * @brief Add a shadow entry for a given item id that is a thread starter
1693          *
1694          * We store every public item entry additionally with the user id "0".
1695          * This is used for the community page and for the search.
1696          * It is planned that in the future we will store public item entries only once.
1697          *
1698          * @param integer $itemid Item ID that should be added
1699          */
1700         public static function addShadow($itemid)
1701         {
1702                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network'];
1703                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1704                 $item = dba::selectFirst('item', $fields, $condition);
1705
1706                 if (!DBM::is_result($item)) {
1707                         return;
1708                 }
1709
1710                 // is it already a copy?
1711                 if (($itemid == 0) || ($item['uid'] == 0)) {
1712                         return;
1713                 }
1714
1715                 // Is it a visible public post?
1716                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1717                         return;
1718                 }
1719
1720                 // is it an entry from a connector? Only add an entry for natively connected networks
1721                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1722                         return;
1723                 }
1724
1725                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1726
1727                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
1728                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
1729
1730                         if (!self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1731                                 // Preparing public shadow (removing user specific data)
1732                                 $item['uid'] = 0;
1733                                 unset($item['id']);
1734                                 unset($item['parent']);
1735                                 unset($item['wall']);
1736                                 unset($item['mention']);
1737                                 unset($item['origin']);
1738                                 unset($item['starred']);
1739                                 if ($item['uri'] == $item['parent-uri']) {
1740                                         $item['contact-id'] = $item['owner-id'];
1741                                 } else {
1742                                         $item['contact-id'] = $item['author-id'];
1743                                 }
1744
1745                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1746                                         $item['type'] = 'remote-comment';
1747                                 } elseif ($item['type'] == 'wall') {
1748                                         $item['type'] = 'remote';
1749                                 }
1750
1751                                 $public_shadow = self::insert($item, false, false, true);
1752
1753                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1754                         }
1755                 }
1756         }
1757
1758         /**
1759          * @brief Add a shadow entry for a given item id that is a comment
1760          *
1761          * This function does the same like the function above - but for comments
1762          *
1763          * @param integer $itemid Item ID that should be added
1764          */
1765         public static function addShadowPost($itemid)
1766         {
1767                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1768                 if (!DBM::is_result($item)) {
1769                         return;
1770                 }
1771
1772                 // Is it a toplevel post?
1773                 if ($item['id'] == $item['parent']) {
1774                         self::addShadow($itemid);
1775                         return;
1776                 }
1777
1778                 // Is this a shadow entry?
1779                 if ($item['uid'] == 0) {
1780                         return;
1781                 }
1782
1783                 // Is there a shadow parent?
1784                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
1785                         return;
1786                 }
1787
1788                 // Is there already a shadow entry?
1789                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1790                         return;
1791                 }
1792
1793                 // Save "origin" and "parent" state
1794                 $origin = $item['origin'];
1795                 $parent = $item['parent'];
1796
1797                 // Preparing public shadow (removing user specific data)
1798                 $item['uid'] = 0;
1799                 unset($item['id']);
1800                 unset($item['parent']);
1801                 unset($item['wall']);
1802                 unset($item['mention']);
1803                 unset($item['origin']);
1804                 unset($item['starred']);
1805                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1806
1807                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1808                         $item['type'] = 'remote-comment';
1809                 } elseif ($item['type'] == 'wall') {
1810                         $item['type'] = 'remote';
1811                 }
1812
1813                 $public_shadow = self::insert($item, false, false, true);
1814
1815                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1816
1817                 // If this was a comment to a Diaspora post we don't get our comment back.
1818                 // This means that we have to distribute the comment by ourselves.
1819                 if ($origin && self::exists(['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1820                         self::distribute($public_shadow);
1821                 }
1822         }
1823
1824          /**
1825          * Adds a "lang" specification in a "postopts" element of given $arr,
1826          * if possible and not already present.
1827          * Expects "body" element to exist in $arr.
1828          */
1829         private static function addLanguageInPostopts(&$item)
1830         {
1831                 $postopts = "";
1832
1833                 if (!empty($item['postopts'])) {
1834                         if (strstr($item['postopts'], 'lang=')) {
1835                                 // do not override
1836                                 return;
1837                         }
1838                         $postopts = $item['postopts'];
1839                 }
1840
1841                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1842
1843                 $languages = (new Text_LanguageDetect())->detect($naked_body, 3);
1844
1845                 if (sizeof($languages) > 0) {
1846                         if ($postopts != '') {
1847                                 $postopts .= '&'; // arbitrary separator, to be reviewed
1848                         }
1849
1850                         $postopts .= 'lang=';
1851                         $sep = "";
1852
1853                         foreach ($languages as $language => $score) {
1854                                 $postopts .= $sep . $language . ";" . $score;
1855                                 $sep = ':';
1856                         }
1857                         $item['postopts'] = $postopts;
1858                 }
1859         }
1860
1861         /**
1862          * @brief Creates an unique guid out of a given uri
1863          *
1864          * @param string $uri uri of an item entry
1865          * @param string $host hostname for the GUID prefix
1866          * @return string unique guid
1867          */
1868         public static function guidFromUri($uri, $host)
1869         {
1870                 // Our regular guid routine is using this kind of prefix as well
1871                 // We have to avoid that different routines could accidentally create the same value
1872                 $parsed = parse_url($uri);
1873
1874                 // We use a hash of the hostname as prefix for the guid
1875                 $guid_prefix = hash("crc32", $host);
1876
1877                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1878                 unset($parsed["scheme"]);
1879
1880                 // Glue it together to be able to make a hash from it
1881                 $host_id = implode("/", $parsed);
1882
1883                 // We could use any hash algorithm since it isn't a security issue
1884                 $host_hash = hash("ripemd128", $host_id);
1885
1886                 return $guid_prefix.$host_hash;
1887         }
1888
1889         /**
1890          * generate an unique URI
1891          *
1892          * @param integer $uid User id
1893          * @param string $guid An existing GUID (Otherwise it will be generated)
1894          *
1895          * @return string
1896          */
1897         public static function newURI($uid, $guid = "")
1898         {
1899                 if ($guid == "") {
1900                         $guid = get_guid(32);
1901                 }
1902
1903                 $hostname = self::getApp()->get_hostname();
1904
1905                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
1906
1907                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
1908
1909                 return $uri;
1910         }
1911
1912         /**
1913          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1914          *
1915          * This can be used to filter for inactive contacts.
1916          * Only do this for public postings to avoid privacy problems, since poco data is public.
1917          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1918          *
1919          * @param array $arr Contains the just posted item record
1920          */
1921         private static function updateContact($arr)
1922         {
1923                 // Unarchive the author
1924                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1925                 if (DBM::is_result($contact)) {
1926                         Contact::unmarkForArchival($contact);
1927                 }
1928
1929                 // Unarchive the contact if it's not our own contact
1930                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1931                 if (DBM::is_result($contact)) {
1932                         Contact::unmarkForArchival($contact);
1933                 }
1934
1935                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1936
1937                 // Is it a forum? Then we don't care about the rules from above
1938                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1939                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1940                                 $update = true;
1941                         }
1942                 }
1943
1944                 if ($update) {
1945                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1946                                 ['id' => $arr['contact-id']]);
1947                 }
1948                 // Now do the same for the system wide contacts with uid=0
1949                 if (!$arr['private']) {
1950                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1951                                 ['id' => $arr['owner-id']]);
1952
1953                         if ($arr['owner-id'] != $arr['author-id']) {
1954                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1955                                         ['id' => $arr['author-id']]);
1956                         }
1957                 }
1958         }
1959
1960         public static function setHashtags(&$item)
1961         {
1962
1963                 $tags = get_tags($item["body"]);
1964
1965                 // No hashtags?
1966                 if (!count($tags)) {
1967                         return false;
1968                 }
1969
1970                 // This sorting is important when there are hashtags that are part of other hashtags
1971                 // Otherwise there could be problems with hashtags like #test and #test2
1972                 rsort($tags);
1973
1974                 $URLSearchString = "^\[\]";
1975
1976                 // All hashtags should point to the home server if "local_tags" is activated
1977                 if (Config::get('system', 'local_tags')) {
1978                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1979                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
1980
1981                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1982                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
1983                 }
1984
1985                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1986                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1987                         function ($match) {
1988                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1989                         }, $item["body"]);
1990
1991                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1992                         function ($match) {
1993                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1994                         }, $item["body"]);
1995
1996                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1997                         function ($match) {
1998                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1999                         }, $item["body"]);
2000
2001                 // Repair recursive urls
2002                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2003                                 "&num;$2", $item["body"]);
2004
2005                 foreach ($tags as $tag) {
2006                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
2007                                 continue;
2008                         }
2009
2010                         $basetag = str_replace('_',' ',substr($tag,1));
2011
2012                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
2013
2014                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2015
2016                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2017                                 if (strlen($item["tag"])) {
2018                                         $item["tag"] = ','.$item["tag"];
2019                                 }
2020                                 $item["tag"] = $newtag.$item["tag"];
2021                         }
2022                 }
2023
2024                 // Convert back the masked hashtags
2025                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2026         }
2027
2028         public static function getGuidById($id)
2029         {
2030                 $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
2031                 if (DBM::is_result($item)) {
2032                         return $item['guid'];
2033                 } else {
2034                         return '';
2035                 }
2036         }
2037
2038         public static function getIdAndNickByGuid($guid, $uid = 0)
2039         {
2040                 $nick = "";
2041                 $id = 0;
2042
2043                 if ($uid == 0) {
2044                         $uid == local_user();
2045                 }
2046
2047                 // Does the given user have this item?
2048                 if ($uid) {
2049                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2050                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2051                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2052                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
2053                         if (DBM::is_result($item)) {
2054                                 $id = $item["id"];
2055                                 $nick = $item["nickname"];
2056                         }
2057                 }
2058
2059                 // Or is it anywhere on the server?
2060                 if ($nick == "") {
2061                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2062                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2063                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2064                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
2065                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
2066                                         AND NOT `item`.`private` AND `item`.`wall`
2067                                         AND `item`.`guid` = ?", $guid);
2068                         if (DBM::is_result($item)) {
2069                                 $id = $item["id"];
2070                                 $nick = $item["nickname"];
2071                         }
2072                 }
2073                 return ["nick" => $nick, "id" => $id];
2074         }
2075
2076         /**
2077          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2078          * @param int $uid
2079          * @param int $item_id
2080          * @return bool true if item was deleted, else false
2081          */
2082         private static function tagDeliver($uid, $item_id)
2083         {
2084                 $mention = false;
2085
2086                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
2087                 if (!DBM::is_result($user)) {
2088                         return;
2089                 }
2090
2091                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
2092                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
2093
2094                 $item = dba::selectFirst('item', [], ['id' => $item_id]);
2095                 if (!DBM::is_result($item)) {
2096                         return;
2097                 }
2098
2099                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
2100
2101                 /*
2102                  * Diaspora uses their own hardwired link URL in @-tags
2103                  * instead of the one we supply with webfinger
2104                  */
2105                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
2106
2107                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2108                 if ($cnt) {
2109                         foreach ($matches as $mtch) {
2110                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
2111                                         $mention = true;
2112                                         logger('mention found: ' . $mtch[2]);
2113                                 }
2114                         }
2115                 }
2116
2117                 if (!$mention) {
2118                         if (($community_page || $prvgroup) &&
2119                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2120                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2121                                 // delete it!
2122                                 logger("no-mention top-level post to community or private group. delete.");
2123                                 dba::delete('item', ['id' => $item_id]);
2124                                 return true;
2125                         }
2126                         return;
2127                 }
2128
2129                 $arr = ['item' => $item, 'user' => $user];
2130
2131                 Addon::callHooks('tagged', $arr);
2132
2133                 if (!$community_page && !$prvgroup) {
2134                         return;
2135                 }
2136
2137                 /*
2138                  * tgroup delivery - setup a second delivery chain
2139                  * prevent delivery looping - only proceed
2140                  * if the message originated elsewhere and is a top-level post
2141                  */
2142                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2143                         return;
2144                 }
2145
2146                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2147                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2148                 if (!DBM::is_result($self)) {
2149                         return;
2150                 }
2151
2152                 $owner_id = Contact::getIdForURL($self['url']);
2153
2154                 // also reset all the privacy bits to the forum default permissions
2155
2156                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2157
2158                 $forum_mode = ($prvgroup ? 2 : 1);
2159
2160                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2161                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
2162                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
2163                 dba::update('item', $fields, ['id' => $item_id]);
2164
2165                 self::updateThread($item_id);
2166
2167                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2168         }
2169
2170         public static function isRemoteSelf($contact, &$datarray)
2171         {
2172                 $a = get_app();
2173
2174                 if (!$contact['remote_self']) {
2175                         return false;
2176                 }
2177
2178                 // Prevent the forwarding of posts that are forwarded
2179                 if ($datarray["extid"] == NETWORK_DFRN) {
2180                         logger('Already forwarded', LOGGER_DEBUG);
2181                         return false;
2182                 }
2183
2184                 // Prevent to forward already forwarded posts
2185                 if ($datarray["app"] == $a->get_hostname()) {
2186                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2187                         return false;
2188                 }
2189
2190                 // Only forward posts
2191                 if ($datarray["verb"] != ACTIVITY_POST) {
2192                         logger('No post', LOGGER_DEBUG);
2193                         return false;
2194                 }
2195
2196                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2197                         logger('Not public', LOGGER_DEBUG);
2198                         return false;
2199                 }
2200
2201                 $datarray2 = $datarray;
2202                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2203                 if ($contact['remote_self'] == 2) {
2204                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2205                                         ['uid' => $contact['uid'], 'self' => true]);
2206                         if (DBM::is_result($self)) {
2207                                 $datarray['contact-id'] = $self["id"];
2208
2209                                 $datarray['owner-name'] = $self["name"];
2210                                 $datarray['owner-link'] = $self["url"];
2211                                 $datarray['owner-avatar'] = $self["thumb"];
2212
2213                                 $datarray['author-name']   = $datarray['owner-name'];
2214                                 $datarray['author-link']   = $datarray['owner-link'];
2215                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2216
2217                                 unset($datarray['created']);
2218                                 unset($datarray['edited']);
2219
2220                                 unset($datarray['network']);
2221                                 unset($datarray['owner-id']);
2222                                 unset($datarray['author-id']);
2223                         }
2224
2225                         if ($contact['network'] != NETWORK_FEED) {
2226                                 $datarray["guid"] = get_guid(32);
2227                                 unset($datarray["plink"]);
2228                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2229                                 $datarray["parent-uri"] = $datarray["uri"];
2230                                 $datarray["thr-parent"] = $datarray["uri"];
2231                                 $datarray["extid"] = NETWORK_DFRN;
2232                                 $urlpart = parse_url($datarray2['author-link']);
2233                                 $datarray["app"] = $urlpart["host"];
2234                         } else {
2235                                 $datarray['private'] = 0;
2236                         }
2237                 }
2238
2239                 if ($contact['network'] != NETWORK_FEED) {
2240                         // Store the original post
2241                         $result = self::insert($datarray2, false, false);
2242                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2243                 } else {
2244                         $datarray["app"] = "Feed";
2245                         $result = true;
2246                 }
2247
2248                 // Trigger automatic reactions for addons
2249                 $datarray['api_source'] = true;
2250
2251                 // We have to tell the hooks who we are - this really should be improved
2252                 $_SESSION["authenticated"] = true;
2253                 $_SESSION["uid"] = $contact['uid'];
2254
2255                 return $result;
2256         }
2257
2258         /**
2259          *
2260          * @param string $s
2261          * @param int    $uid
2262          * @param array  $item
2263          * @param int    $cid
2264          * @return string
2265          */
2266         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2267         {
2268                 if (Config::get('system', 'disable_embedded')) {
2269                         return $s;
2270                 }
2271
2272                 logger('check for photos', LOGGER_DEBUG);
2273                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2274
2275                 $orig_body = $s;
2276                 $new_body = '';
2277
2278                 $img_start = strpos($orig_body, '[img');
2279                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2280                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2281
2282                 while (($img_st_close !== false) && ($img_len !== false)) {
2283                         $img_st_close++; // make it point to AFTER the closing bracket
2284                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2285
2286                         logger('found photo ' . $image, LOGGER_DEBUG);
2287
2288                         if (stristr($image, $site . '/photo/')) {
2289                                 // Only embed locally hosted photos
2290                                 $replace = false;
2291                                 $i = basename($image);
2292                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2293                                 $x = strpos($i, '-');
2294
2295                                 if ($x) {
2296                                         $res = substr($i, $x + 1);
2297                                         $i = substr($i, 0, $x);
2298                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2299                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2300                                         if (DBM::is_result($photo)) {
2301                                                 /*
2302                                                  * Check to see if we should replace this photo link with an embedded image
2303                                                  * 1. No need to do so if the photo is public
2304                                                  * 2. If there's a contact-id provided, see if they're in the access list
2305                                                  *    for the photo. If so, embed it.
2306                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2307                                                  *    permissions, regardless of order but first check to see if they're an exact
2308                                                  *    match to save some processing overhead.
2309                                                  */
2310                                                 if (self::hasPermissions($photo)) {
2311                                                         if ($cid) {
2312                                                                 $recips = self::enumeratePermissions($photo);
2313                                                                 if (in_array($cid, $recips)) {
2314                                                                         $replace = true;
2315                                                                 }
2316                                                         } elseif ($item) {
2317                                                                 if (self::samePermissions($item, $photo)) {
2318                                                                         $replace = true;
2319                                                                 }
2320                                                         }
2321                                                 }
2322                                                 if ($replace) {
2323                                                         $data = $photo['data'];
2324                                                         $type = $photo['type'];
2325
2326                                                         // If a custom width and height were specified, apply before embedding
2327                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2328                                                                 logger('scaling photo', LOGGER_DEBUG);
2329
2330                                                                 $width = intval($match[1]);
2331                                                                 $height = intval($match[2]);
2332
2333                                                                 $Image = new Image($data, $type);
2334                                                                 if ($Image->isValid()) {
2335                                                                         $Image->scaleDown(max($width, $height));
2336                                                                         $data = $Image->asString();
2337                                                                         $type = $Image->getType();
2338                                                                 }
2339                                                         }
2340
2341                                                         logger('replacing photo', LOGGER_DEBUG);
2342                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2343                                                         logger('replaced: ' . $image, LOGGER_DATA);
2344                                                 }
2345                                         }
2346                                 }
2347                         }
2348
2349                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2350                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2351                         if ($orig_body === false) {
2352                                 $orig_body = '';
2353                         }
2354
2355                         $img_start = strpos($orig_body, '[img');
2356                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2357                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2358                 }
2359
2360                 $new_body = $new_body . $orig_body;
2361
2362                 return $new_body;
2363         }
2364
2365         private static function hasPermissions($obj)
2366         {
2367                 return (
2368                         (
2369                                 x($obj, 'allow_cid')
2370                         ) || (
2371                                 x($obj, 'allow_gid')
2372                         ) || (
2373                                 x($obj, 'deny_cid')
2374                         ) || (
2375                                 x($obj, 'deny_gid')
2376                         )
2377                 );
2378         }
2379
2380         private static function samePermissions($obj1, $obj2)
2381         {
2382                 // first part is easy. Check that these are exactly the same.
2383                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2384                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2385                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2386                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2387                         return true;
2388                 }
2389
2390                 // This is harder. Parse all the permissions and compare the resulting set.
2391                 $recipients1 = self::enumeratePermissions($obj1);
2392                 $recipients2 = self::enumeratePermissions($obj2);
2393                 sort($recipients1);
2394                 sort($recipients2);
2395
2396                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2397                 return ($recipients1 == $recipients2);
2398         }
2399
2400         // returns an array of contact-ids that are allowed to see this object
2401         private static function enumeratePermissions($obj)
2402         {
2403                 $allow_people = expand_acl($obj['allow_cid']);
2404                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2405                 $deny_people  = expand_acl($obj['deny_cid']);
2406                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2407                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2408                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2409                 $recipients   = array_diff($recipients, $deny);
2410                 return $recipients;
2411         }
2412
2413         public static function getFeedTags($item)
2414         {
2415                 $ret = [];
2416                 $matches = false;
2417                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2418                 if ($cnt) {
2419                         for ($x = 0; $x < $cnt; $x ++) {
2420                                 if ($matches[1][$x]) {
2421                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2422                                 }
2423                         }
2424                 }
2425                 $matches = false;
2426                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2427                 if ($cnt) {
2428                         for ($x = 0; $x < $cnt; $x ++) {
2429                                 if ($matches[1][$x]) {
2430                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2431                                 }
2432                         }
2433                 }
2434                 return $ret;
2435         }
2436
2437         public static function expire($uid, $days, $network = "", $force = false)
2438         {
2439                 if (!$uid || ($days < 1)) {
2440                         return;
2441                 }
2442
2443                 /*
2444                  * $expire_network_only = save your own wall posts
2445                  * and just expire conversations started by others
2446                  */
2447                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
2448                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
2449
2450                 if ($network != "") {
2451                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
2452
2453                         /*
2454                          * There is an index "uid_network_received" but not "uid_network_created"
2455                          * This avoids the creation of another index just for one purpose.
2456                          * And it doesn't really matter wether to look at "received" or "created"
2457                          */
2458                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2459                 } else {
2460                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2461                 }
2462
2463                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
2464                         WHERE `uid` = %d $range
2465                         AND `id` = `parent`
2466                         $sql_extra
2467                         AND `deleted` = 0",
2468                         intval($uid),
2469                         intval($days)
2470                 );
2471
2472                 if (!DBM::is_result($r)) {
2473                         return;
2474                 }
2475
2476                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
2477
2478                 // Forcing expiring of items - but not notes and marked items
2479                 if ($force) {
2480                         $expire_items = true;
2481                 }
2482
2483                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
2484                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
2485                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
2486
2487                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2488
2489                 foreach ($r as $item) {
2490
2491                         // don't expire filed items
2492
2493                         if (strpos($item['file'],'[') !== false) {
2494                                 continue;
2495                         }
2496
2497                         // Only expire posts, not photos and photo comments
2498
2499                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
2500                                 continue;
2501                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
2502                                 continue;
2503                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
2504                                 continue;
2505                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
2506                                 continue;
2507                         }
2508
2509                         self::deleteById($item['id'], PRIORITY_LOW);
2510                 }
2511         }
2512
2513         public static function firstPostDate($uid, $wall = false)
2514         {
2515                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2516                 $params = ['order' => ['created' => false]];
2517                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2518                 if (DBM::is_result($thread)) {
2519                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2520                 }
2521                 return false;
2522         }
2523
2524         /**
2525          * @brief add/remove activity to an item
2526          *
2527          * Toggle activities as like,dislike,attend of an item
2528          *
2529          * @param string $item_id
2530          * @param string $verb
2531          *              Activity verb. One of
2532          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2533          *                      attendno, unattendno, attendmaybe, unattendmaybe
2534          * @hook 'post_local_end'
2535          *              array $arr
2536          *                      'post_id' => ID of posted item
2537          */
2538         public static function performLike($item_id, $verb)
2539         {
2540                 if (!local_user() && !remote_user()) {
2541                         return false;
2542                 }
2543
2544                 switch ($verb) {
2545                         case 'like':
2546                         case 'unlike':
2547                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
2548                                 $activity = ACTIVITY_LIKE;
2549                                 break;
2550                         case 'dislike':
2551                         case 'undislike':
2552                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
2553                                 $activity = ACTIVITY_DISLIKE;
2554                                 break;
2555                         case 'attendyes':
2556                         case 'unattendyes':
2557                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
2558                                 $activity = ACTIVITY_ATTEND;
2559                                 break;
2560                         case 'attendno':
2561                         case 'unattendno':
2562                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
2563                                 $activity = ACTIVITY_ATTENDNO;
2564                                 break;
2565                         case 'attendmaybe':
2566                         case 'unattendmaybe':
2567                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
2568                                 $activity = ACTIVITY_ATTENDMAYBE;
2569                                 break;
2570                         default:
2571                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2572                                 return false;
2573                 }
2574
2575                 // Enable activity toggling instead of on/off
2576                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2577
2578                 logger('like: verb ' . $verb . ' item ' . $item_id);
2579
2580                 $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2581                 if (!DBM::is_result($item)) {
2582                         logger('like: unknown item ' . $item_id);
2583                         return false;
2584                 }
2585
2586                 $uid = $item['uid'];
2587                 if (($uid == 0) && local_user()) {
2588                         $uid = local_user();
2589                 }
2590
2591                 if (!can_write_wall($uid)) {
2592                         logger('like: unable to write on wall ' . $uid);
2593                         return false;
2594                 }
2595
2596                 // Retrieves the local post owner
2597                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2598                 if (!DBM::is_result($owner_self_contact)) {
2599                         logger('like: unknown owner ' . $uid);
2600                         return false;
2601                 }
2602
2603                 // Retrieve the current logged in user's public contact
2604                 $author_id = public_contact();
2605
2606                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
2607                 if (!DBM::is_result($author_contact)) {
2608                         logger('like: unknown author ' . $author_id);
2609                         return false;
2610                 }
2611
2612                 // Contact-id is the uid-dependant author contact
2613                 if (local_user() == $uid) {
2614                         $item_contact_id = $owner_self_contact['id'];
2615                         $item_contact = $owner_self_contact;
2616                 } else {
2617                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2618                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2619                         if (!DBM::is_result($item_contact)) {
2620                                 logger('like: unknown item contact ' . $item_contact_id);
2621                                 return false;
2622                         }
2623                 }
2624
2625                 // Look for an existing verb row
2626                 // event participation are essentially radio toggles. If you make a subsequent choice,
2627                 // we need to eradicate your first choice.
2628                 if ($event_verb_flag) {
2629                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
2630                 } else {
2631                         $verbs = $activity;
2632                 }
2633
2634                 $base_condition = ['verb' => $verbs, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2635                         'author-id' => $author_contact['id'], 'uid' => item['uid']];
2636
2637                 $condition = array_merge($base_condition, ['parent' => $item_id]);
2638                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2639
2640                 if (!DBM::is_result($like_item)) {
2641                         $condition = array_merge($base_condition, ['parent-uri' => $item_id]);
2642                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2643                 }
2644
2645                 if (!DBM::is_result($like_item)) {
2646                         $condition = array_merge($base_condition, ['thr-parent' => $item_id]);
2647                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2648                 }
2649
2650                 // If it exists, mark it as deleted
2651                 if (DBM::is_result($like_item)) {
2652                         // Already voted, undo it
2653                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2654                         /// @todo Consider using self::update - but before doing so, check the side effects
2655                         dba::update('item', $fields, ['id' => $like_item['id']]);
2656
2657                         // Clean up the Diaspora signatures for this like
2658                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
2659                         // if it had been enabled in the past
2660                         dba::delete('sign', ['iid' => $like_item['id']]);
2661
2662                         $like_item_id = $like_item['id'];
2663                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
2664
2665                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2666                                 return true;
2667                         }
2668                 }
2669
2670                 // Verb is "un-something", just trying to delete existing entries
2671                 if (strpos($verb, 'un') === 0) {
2672                         return true;
2673                 }
2674
2675                 // Else or if event verb different from existing row, create a new item row
2676                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2677                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2678                         $post_type = L10n::t('event');
2679                 }
2680                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2681                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2682                 $body = $item['body'];
2683
2684                 $obj = <<< EOT
2685
2686                 <object>
2687                         <type>$objtype</type>
2688                         <local>1</local>
2689                         <id>{$item['uri']}</id>
2690                         <link>$link</link>
2691                         <title></title>
2692                         <content>$body</content>
2693                 </object>
2694 EOT;
2695
2696                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2697                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2698                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2699
2700                 $new_item = [
2701                         'guid'          => get_guid(32),
2702                         'uri'           => self::newURI($item['uid']),
2703                         'uid'           => $item['uid'],
2704                         'contact-id'    => $item_contact_id,
2705                         'type'          => 'activity',
2706                         'wall'          => $item['wall'],
2707                         'origin'        => 1,
2708                         'gravity'       => GRAVITY_ACTIVITY,
2709                         'parent'        => $item['id'],
2710                         'parent-uri'    => $item['uri'],
2711                         'thr-parent'    => $item['uri'],
2712                         'owner-id'      => $item['owner-id'],
2713                         'owner-name'    => $item['owner-name'],
2714                         'owner-link'    => $item['owner-link'],
2715                         'owner-avatar'  => $item['owner-avatar'],
2716                         'author-id'     => $author_contact['id'],
2717                         'author-name'   => $author_contact['name'],
2718                         'author-link'   => $author_contact['url'],
2719                         'author-avatar' => $author_contact['thumb'],
2720                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2721                         'verb'          => $activity,
2722                         'object-type'   => $objtype,
2723                         'object'        => $obj,
2724                         'allow_cid'     => $item['allow_cid'],
2725                         'allow_gid'     => $item['allow_gid'],
2726                         'deny_cid'      => $item['deny_cid'],
2727                         'deny_gid'      => $item['deny_gid'],
2728                         'visible'       => 1,
2729                         'unseen'        => 1,
2730                 ];
2731
2732                 $new_item_id = self::insert($new_item);
2733
2734                 // If the parent item isn't visible then set it to visible
2735                 if (!$item['visible']) {
2736                         self::update(['visible' => true], ['id' => $item['id']]);
2737                 }
2738
2739                 // Save the author information for the like in case we need to relay to Diaspora
2740                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2741
2742                 $new_item['id'] = $new_item_id;
2743
2744                 Addon::callHooks('post_local_end', $new_item);
2745
2746                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2747
2748                 return true;
2749         }
2750
2751         private static function addThread($itemid, $onlyshadow = false)
2752         {
2753                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2754                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2755                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2756                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2757                 $item = dba::selectFirst('item', $fields, $condition);
2758
2759                 if (!DBM::is_result($item)) {
2760                         return;
2761                 }
2762
2763                 $item['iid'] = $itemid;
2764
2765                 if (!$onlyshadow) {
2766                         $result = dba::insert('thread', $item);
2767
2768                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2769                 }
2770         }
2771
2772         private static function updateThread($itemid, $setmention = false)
2773         {
2774                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
2775                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2776                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
2777                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2778
2779                 $item = dba::selectFirst('item', $fields, $condition);
2780                 if (!DBM::is_result($item)) {
2781                         return;
2782                 }
2783
2784                 if ($setmention) {
2785                         $item["mention"] = 1;
2786                 }
2787
2788                 $sql = "";
2789
2790                 $fields = [];
2791
2792                 foreach ($item as $field => $data) {
2793                         if (!in_array($field, ["guid"])) {
2794                                 $fields[$field] = $data;
2795                         }
2796                 }
2797
2798                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2799
2800                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2801         }
2802
2803         private static function deleteThread($itemid, $itemuri = "")
2804         {
2805                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2806                 if (!DBM::is_result($item)) {
2807                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2808                         return;
2809                 }
2810
2811                 // Using dba::delete at this time could delete the associated item entries
2812                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2813
2814                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2815
2816                 if ($itemuri != "") {
2817                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2818                         if (!self::exists($condition)) {
2819                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2820                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2821                         }
2822                 }
2823         }
2824 }