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