src/Model/Item.php

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