src/Model/Item.php

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