src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Content\Text;
  11 use Friendica\Core\Addon;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\PConfig;
  15 use Friendica\Core\System;
  16 use Friendica\Core\Worker;
  17 use Friendica\Database\DBM;
  18 use Friendica\Model\Contact;
  19 use Friendica\Model\Conversation;
  20 use Friendica\Model\Group;
  21 use Friendica\Model\Term;
  22 use Friendica\Object\Image;
  23 use Friendica\Protocol\Diaspora;
  24 use Friendica\Protocol\OStatus;
  25 use Friendica\Util\DateTimeFormat;
  26 use Friendica\Util\XML;
  27 use Friendica\Util\Lock;
  28 use dba;
  29 use Text_LanguageDetect;
  30
  31 require_once 'boot.php';
  32 require_once 'include/items.php';
  33 require_once 'include/text.php';
  34
  35 class Item extends BaseObject
  36 {
  37         // Field list that is used to display the items
  38         const DISPLAY_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network',
  39                         'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  40                         'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  41                         'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  42                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  43                         'author-id', 'author-link', 'author-name', 'author-avatar',
  44                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar',
  45                         'contact-id', 'contact-link', 'contact-name', 'contact-avatar',
  46                         'writable', 'self', 'cid', 'alias',
  47                         'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  48                         'event-summary', 'event-desc', 'event-location', 'event-type',
  49                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
  50
  51         // Field list that is used to deliver items via the protocols
  52         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  53                         'created', 'edited', 'verb', 'object-type', 'object', 'target',
  54                         'private', 'title', 'body', 'location', 'coord', 'app',
  55                         'attach', 'tag', 'bookmark', 'deleted', 'extid',
  56                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  57                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  58                         'signed_text', 'signature', 'signer'];
  59
  60         // Field list for "item-content" table that is mixed with the item table
  61         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  62                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  63                         'object-type', 'object', 'target-type', 'target', 'plink'];
  64
  65         // Field list for "item-content" table that is not present in the "item" table
  66         const CONTENT_FIELDLIST = ['language'];
  67
  68         // All fields in the item table
  69         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  70                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid',
  71                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  72                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  73                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  74                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  75                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  76                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  77                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  78                         'author-id', 'author-link', 'author-name', 'author-avatar',
  79                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  80
  81         /**
  82          * @brief Fetch a single item row
  83          *
  84          * @param mixed $stmt statement object
  85          * @return array current row
  86          */
  87         public static function fetch($stmt)
  88         {
  89                 $row = dba::fetch($stmt);
  90
  91                 // Fetch data from the item-content table whenever there is content there
  92                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
  93                         if (empty($row[$field]) && !empty($row['item-' . $field])) {
  94                                 $row[$field] = $row['item-' . $field];
  95                         }
  96                         unset($row['item-' . $field]);
  97                 }
  98
  99                 // We prefer the data from the user's contact over the public one
 100                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 101                         ($row['author-link'] == $row['contact-link'])) {
 102                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 103                                 $row['author-avatar'] = $row['contact-avatar'];
 104                         }
 105                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 106                                 $row['author-name'] = $row['contact-name'];
 107                         }
 108                 }
 109
 110                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 111                         ($row['owner-link'] == $row['contact-link'])) {
 112                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 113                                 $row['owner-avatar'] = $row['contact-avatar'];
 114                         }
 115                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 116                                 $row['owner-name'] = $row['contact-name'];
 117                         }
 118                 }
 119
 120                 // Build the tag string out of the term entries
 121                 if (isset($row['id']) && array_key_exists('tag', $row)) {
 122                         $row['tag'] = Term::tagTextFromItemId($row['id']);
 123                 }
 124
 125                 // Build the file string out of the term entries
 126                 if (isset($row['id']) && array_key_exists('file', $row)) {
 127                         $row['file'] = Term::fileTextFromItemId($row['id']);
 128                 }
 129
 130                 // We can always comment on posts from these networks
 131                 if (isset($row['writable']) && !empty($row['network']) &&
 132                         in_array($row['network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
 133                         $row['writable'] = true;
 134                 }
 135
 136                 return $row;
 137         }
 138
 139         /**
 140          * @brief Fills an array with data from an item query
 141          *
 142          * @param object $stmt statement object
 143          * @return array Data array
 144          */
 145         public static function inArray($stmt, $do_close = true) {
 146                 if (is_bool($stmt)) {
 147                         return $stmt;
 148                 }
 149
 150                 $data = [];
 151                 while ($row = self::fetch($stmt)) {
 152                         $data[] = $row;
 153                 }
 154                 if ($do_close) {
 155                         dba::close($stmt);
 156                 }
 157                 return $data;
 158         }
 159
 160         /**
 161          * @brief Check if item data exists
 162          *
 163          * @param array $condition array of fields for condition
 164          *
 165          * @return boolean Are there rows for that condition?
 166          */
 167         public static function exists($condition) {
 168                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 169
 170                 if (is_bool($stmt)) {
 171                         $retval = $stmt;
 172                 } else {
 173                         $retval = (dba::num_rows($stmt) > 0);
 174                 }
 175
 176                 dba::close($stmt);
 177
 178                 return $retval;
 179         }
 180
 181         /**
 182          * Retrieve a single record from the item table for a given user and returns it in an associative array
 183          *
 184          * @brief Retrieve a single record from a table
 185          * @param integer $uid User ID
 186          * @param array  $fields
 187          * @param array  $condition
 188          * @param array  $params
 189          * @return bool|array
 190          * @see dba::select
 191          */
 192         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 193         {
 194                 $params['uid'] = $uid;
 195
 196                 if (empty($selected)) {
 197                         $selected = Item::DISPLAY_FIELDLIST;
 198                 }
 199
 200                 return self::selectFirst($selected, $condition, $params);
 201         }
 202
 203         /**
 204          * @brief Select rows from the item table for a given user
 205          *
 206          * @param integer $uid User ID
 207          * @param array  $selected  Array of selected fields, empty for all
 208          * @param array  $condition Array of fields for condition
 209          * @param array  $params    Array of several parameters
 210          *
 211          * @return boolean|object
 212          */
 213         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 214         {
 215                 $params['uid'] = $uid;
 216
 217                 if (empty($selected)) {
 218                         $selected = Item::DISPLAY_FIELDLIST;
 219                 }
 220
 221                 return self::select($selected, $condition, $params);
 222         }
 223
 224         /**
 225          * Retrieve a single record from the item table and returns it in an associative array
 226          *
 227          * @brief Retrieve a single record from a table
 228          * @param array  $fields
 229          * @param array  $condition
 230          * @param array  $params
 231          * @return bool|array
 232          * @see dba::select
 233          */
 234         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 235         {
 236                 $params['limit'] = 1;
 237
 238                 $result = self::select($fields, $condition, $params);
 239
 240                 if (is_bool($result)) {
 241                         return $result;
 242                 } else {
 243                         $row = self::fetch($result);
 244                         dba::close($result);
 245                         return $row;
 246                 }
 247         }
 248
 249         /**
 250          * @brief Select rows from the item table
 251          *
 252          * @param array  $selected  Array of selected fields, empty for all
 253          * @param array  $condition Array of fields for condition
 254          * @param array  $params    Array of several parameters
 255          *
 256          * @return boolean|object
 257          */
 258         public static function select(array $selected = [], array $condition = [], $params = [])
 259         {
 260                 $uid = 0;
 261                 $usermode = false;
 262
 263                 if (isset($params['uid'])) {
 264                         $uid = $params['uid'];
 265                         $usermode = true;
 266                 }
 267
 268                 $fields = self::fieldlist($selected);
 269
 270                 $select_fields = self::constructSelectFields($fields, $selected);
 271
 272                 $condition_string = dba::buildCondition($condition);
 273
 274                 $condition_string = self::addTablesToFields($condition_string, $fields);
 275
 276                 if ($usermode) {
 277                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 278                 }
 279
 280                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 281
 282                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false);
 283
 284                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 285
 286                 return dba::p($sql, $condition);
 287         }
 288
 289         /**
 290          * @brief Select rows from the starting post in the item table
 291          *
 292          * @param integer $uid User ID
 293          * @param array  $fields    Array of selected fields, empty for all
 294          * @param array  $condition Array of fields for condition
 295          * @param array  $params    Array of several parameters
 296          *
 297          * @return boolean|object
 298          */
 299         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 300         {
 301                 $params['uid'] = $uid;
 302
 303                 if (empty($selected)) {
 304                         $selected = Item::DISPLAY_FIELDLIST;
 305                 }
 306
 307                 return self::selectThread($selected, $condition, $params);
 308         }
 309
 310         /**
 311          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 312          *
 313          * @brief Retrieve a single record from a table
 314          * @param integer $uid User ID
 315          * @param array  $selected
 316          * @param array  $condition
 317          * @param array  $params
 318          * @return bool|array
 319          * @see dba::select
 320          */
 321         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 322         {
 323                 $params['uid'] = $uid;
 324
 325                 if (empty($selected)) {
 326                         $selected = Item::DISPLAY_FIELDLIST;
 327                 }
 328
 329                 return self::selectFirstThread($selected, $condition, $params);
 330         }
 331
 332         /**
 333          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 334          *
 335          * @brief Retrieve a single record from a table
 336          * @param array  $fields
 337          * @param array  $condition
 338          * @param array  $params
 339          * @return bool|array
 340          * @see dba::select
 341          */
 342         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 343         {
 344                 $params['limit'] = 1;
 345                 $result = self::selectThread($fields, $condition, $params);
 346
 347                 if (is_bool($result)) {
 348                         return $result;
 349                 } else {
 350                         $row = self::fetch($result);
 351                         dba::close($result);
 352                         return $row;
 353                 }
 354         }
 355
 356         /**
 357          * @brief Select rows from the starting post in the item table
 358          *
 359          * @param array  $selected  Array of selected fields, empty for all
 360          * @param array  $condition Array of fields for condition
 361          * @param array  $params    Array of several parameters
 362          *
 363          * @return boolean|object
 364          */
 365         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 366         {
 367                 $uid = 0;
 368                 $usermode = false;
 369
 370                 if (isset($params['uid'])) {
 371                         $uid = $params['uid'];
 372                         $usermode = true;
 373                 }
 374
 375                 $fields = self::fieldlist($selected);
 376
 377                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 378                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 379                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 380                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 381
 382                 $select_fields = self::constructSelectFields($fields, $selected);
 383
 384                 $condition_string = dba::buildCondition($condition);
 385
 386                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 387                 $condition_string = self::addTablesToFields($condition_string, $fields);
 388
 389                 if ($usermode) {
 390                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 391                 }
 392
 393                 $param_string = dba::buildParameter($params);
 394                 $param_string = self::addTablesToFields($param_string, $threadfields);
 395                 $param_string = self::addTablesToFields($param_string, $fields);
 396
 397                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true);
 398
 399                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 400
 401                 return dba::p($sql, $condition);
 402         }
 403
 404         /**
 405          * @brief Returns a list of fields that are associated with the item table
 406          *
 407          * @return array field list
 408          */
 409         private static function fieldlist($selected)
 410         {
 411                 $fields = [];
 412
 413                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 414                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 415                         'created', 'edited', 'commented', 'received', 'changed', 'postopts',
 416                         'resource-id', 'event-id', 'tag', 'attach', 'inform',
 417                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 418                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 419                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 420                         'id' => 'item_id', 'network', 'icid'];
 421
 422                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 423
 424                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 425                         'thumb' => 'author-avatar', 'nick' => 'author-nick'];
 426
 427                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 428                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick'];
 429
 430                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 431                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 432                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 433
 434                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 435
 436                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 437
 438                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 439                         'start' => 'event-start','finish' => 'event-finish',
 440                         'summary' => 'event-summary','desc' => 'event-desc',
 441                         'location' => 'event-location', 'type' => 'event-type',
 442                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 443                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 444
 445                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 446
 447                 return $fields;
 448         }
 449
 450         /**
 451          * @brief Returns SQL condition for the "select" functions
 452          *
 453          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 454          *
 455          * @return string SQL condition
 456          */
 457         private static function condition($thread_mode)
 458         {
 459                 if ($thread_mode) {
 460                         $master_table = "`thread`";
 461                 } else {
 462                         $master_table = "`item`";
 463                 }
 464                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 465         }
 466
 467         /**
 468          * @brief Returns all needed "JOIN" commands for the "select" functions
 469          *
 470          * @param integer $uid User ID
 471          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 472          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 473          *
 474          * @return string The SQL joins for the "select" functions
 475          */
 476         private static function constructJoins($uid, $sql_commands, $thread_mode)
 477         {
 478                 if ($thread_mode) {
 479                         $master_table = "`thread`";
 480                         $master_table_key = "`thread`.`iid`";
 481                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 482                 } else {
 483                         $master_table = "`item`";
 484                         $master_table_key = "`item`.`id`";
 485                         $joins = '';
 486                 }
 487
 488                 $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 489                         AND NOT `contact`.`blocked`
 490                         AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 491                         OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 492                         STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 493                         STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 494                         LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 495                         CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 496
 497                 if (strpos($sql_commands, "`group_member`.") !== false) {
 498                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 499                 }
 500
 501                 if (strpos($sql_commands, "`user`.") !== false) {
 502                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 503                 }
 504
 505                 if (strpos($sql_commands, "`event`.") !== false) {
 506                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 507                 }
 508
 509                 if (strpos($sql_commands, "`sign`.") !== false) {
 510                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 511                 }
 512
 513                 if (strpos($sql_commands, "`item-content`.") !== false) {
 514                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
 515                 }
 516
 517                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 518                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 519                 }
 520
 521                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 522                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 523                 }
 524
 525                 return $joins;
 526         }
 527
 528         /**
 529          * @brief Add the field list for the "select" functions
 530          *
 531          * @param array $fields The field definition array
 532          * @param array $selected The array with the selected fields from the "select" functions
 533          *
 534          * @return string The field list
 535          */
 536         private static function constructSelectFields($fields, $selected)
 537         {
 538                 // To be able to fetch the tags we need the item id
 539                 if (in_array('tag', $selected) && !in_array('id', $selected)) {
 540                         $selected[] = 'id';
 541                 }
 542
 543                 // To be able to fetch the files we need the item id
 544                 if (in_array('file', $selected) && !in_array('id', $selected)) {
 545                         $selected[] = 'id';
 546                 }
 547
 548                 $selection = [];
 549                 foreach ($fields as $table => $table_fields) {
 550                         foreach ($table_fields as $field => $select) {
 551                                 if (empty($selected) || in_array($select, $selected)) {
 552                                         if (in_array($select, self::MIXED_CONTENT_FIELDLIST)) {
 553                                                 $selection[] = "`item`.`".$select."` AS `item-" . $select . "`";
 554                                         }
 555                                         if (is_int($field)) {
 556                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 557                                         } else {
 558                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 559                                         }
 560                                 }
 561                         }
 562                 }
 563                 return implode(", ", $selection);
 564         }
 565
 566         /**
 567          * @brief add table definition to fields in an SQL query
 568          *
 569          * @param string $query SQL query
 570          * @param array $fields The field definition array
 571          *
 572          * @return string the changed SQL query
 573          */
 574         private static function addTablesToFields($query, $fields)
 575         {
 576                 foreach ($fields as $table => $table_fields) {
 577                         foreach ($table_fields as $alias => $field) {
 578                                 if (is_int($alias)) {
 579                                         $replace_field = $field;
 580                                 } else {
 581                                         $replace_field = $alias;
 582                                 }
 583
 584                                 $search = "/([^\.])`" . $field . "`/i";
 585                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 586                                 $query = preg_replace($search, $replace, $query);
 587                         }
 588                 }
 589                 return $query;
 590         }
 591
 592         /**
 593          * @brief Update existing item entries
 594          *
 595          * @param array $fields The fields that are to be changed
 596          * @param array $condition The condition for finding the item entries
 597          *
 598          * In the future we may have to change permissions as well.
 599          * Then we had to add the user id as third parameter.
 600          *
 601          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 602          *
 603          * @return integer|boolean number of affected rows - or "false" if there was an error
 604          */
 605         public static function update(array $fields, array $condition)
 606         {
 607                 if (empty($condition) || empty($fields)) {
 608                         return false;
 609                 }
 610
 611                 // To ensure the data integrity we do it in an transaction
 612                 dba::transaction();
 613
 614                 // We cannot simply expand the condition to check for origin entries
 615                 // The condition needn't to be a simple array but could be a complex condition.
 616                 // And we have to execute this query before the update to ensure to fetch the same data.
 617                 $items = dba::select('item', ['id', 'origin', 'uri', 'plink'], $condition);
 618
 619                 $content_fields = [];
 620                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 621                         if (isset($fields[$field])) {
 622                                 $content_fields[$field] = $fields[$field];
 623                                 unset($fields[$field]);
 624                         }
 625                 }
 626
 627                 if (array_key_exists('tag', $fields)) {
 628                         $tags = $fields['tag'];
 629                         unset($fields['tag']);
 630                 } else {
 631                         $tags = '';
 632                 }
 633
 634                 if (array_key_exists('file', $fields)) {
 635                         $files = $fields['file'];
 636                         unset($fields['file']);
 637                 } else {
 638                         $files = '';
 639                 }
 640
 641                 if (!empty($fields)) {
 642                         $success = dba::update('item', $fields, $condition);
 643
 644                         if (!$success) {
 645                                 dba::close($items);
 646                                 dba::rollback();
 647                                 return false;
 648                         }
 649                 }
 650
 651                 // When there is no content for the "old" item table, this will count the fetched items
 652                 $rows = dba::affected_rows();
 653
 654                 while ($item = dba::fetch($items)) {
 655                         if (!empty($item['plink'])) {
 656                                 $content_fields['plink'] =  $item['plink'];
 657                         }
 658                         self::updateContent($content_fields, ['uri' => $item['uri']]);
 659
 660                         if (!empty($tags)) {
 661                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
 662                         }
 663
 664                         if (!empty($files)) {
 665                                 Term::insertFromFileFieldByItemId($item['id'], $files);
 666                         }
 667
 668                         self::updateThread($item['id']);
 669
 670                         // We only need to notfiy others when it is an original entry from us.
 671                         // Only call the notifier when the item has some content relevant change.
 672                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 673                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 674                         }
 675                 }
 676
 677                 dba::close($items);
 678                 dba::commit();
 679                 return $rows;
 680         }
 681
 682         /**
 683          * @brief Delete an item and notify others about it - if it was ours
 684          *
 685          * @param array $condition The condition for finding the item entries
 686          * @param integer $priority Priority for the notification
 687          */
 688         public static function delete($condition, $priority = PRIORITY_HIGH)
 689         {
 690                 $items = dba::select('item', ['id'], $condition);
 691                 while ($item = dba::fetch($items)) {
 692                         self::deleteById($item['id'], $priority);
 693                 }
 694                 dba::close($items);
 695         }
 696
 697         /**
 698          * @brief Delete an item for an user and notify others about it - if it was ours
 699          *
 700          * @param array $condition The condition for finding the item entries
 701          * @param integer $uid User who wants to delete this item
 702          */
 703         public static function deleteForUser($condition, $uid)
 704         {
 705                 if ($uid == 0) {
 706                         return;
 707                 }
 708
 709                 $items = dba::select('item', ['id', 'uid'], $condition);
 710                 while ($item = dba::fetch($items)) {
 711                         // "Deleting" global items just means hiding them
 712                         if ($item['uid'] == 0) {
 713                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 714                         } elseif ($item['uid'] == $uid) {
 715                                 self::deleteById($item['id'], PRIORITY_HIGH);
 716                         } else {
 717                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 718                         }
 719                 }
 720                 dba::close($items);
 721         }
 722
 723         /**
 724          * @brief Delete an item and notify others about it - if it was ours
 725          *
 726          * @param integer $item_id Item ID that should be delete
 727          * @param integer $priority Priority for the notification
 728          *
 729          * @return boolean success
 730          */
 731         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 732         {
 733                 // locate item to be deleted
 734                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 735                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 736                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 737                 $item = self::selectFirst($fields, ['id' => $item_id]);
 738                 if (!DBM::is_result($item)) {
 739                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 740                         return false;
 741                 }
 742
 743                 if ($item['deleted']) {
 744                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 745                         return false;
 746                 }
 747
 748                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
 749                 if (!DBM::is_result($parent)) {
 750                         $parent = ['origin' => false];
 751                 }
 752
 753                 // clean up categories and tags so they don't end up as orphans
 754
 755                 $matches = false;
 756                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 757                 if ($cnt) {
 758                         foreach ($matches as $mtch) {
 759                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 760                         }
 761                 }
 762
 763                 $matches = false;
 764
 765                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 766                 if ($cnt) {
 767                         foreach ($matches as $mtch) {
 768                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 769                         }
 770                 }
 771
 772                 /*
 773                  * If item is a link to a photo resource, nuke all the associated photos
 774                  * (visitors will not have photo resources)
 775                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 776                  * generate a resource-id and therefore aren't intimately linked to the item.
 777                  */
 778                 if (strlen($item['resource-id'])) {
 779                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 780                 }
 781
 782                 // If item is a link to an event, delete the event.
 783                 if (intval($item['event-id'])) {
 784                         Event::delete($item['event-id']);
 785                 }
 786
 787                 // If item has attachments, drop them
 788                 foreach (explode(", ", $item['attach']) as $attach) {
 789                         preg_match("|attach/(\d+)|", $attach, $matches);
 790                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 791                 }
 792
 793                 // Delete tags that had been attached to other items
 794                 self::deleteTagsFromItem($item);
 795
 796                 // Set the item to "deleted"
 797                 // This erasing of item content is superfluous for items with a matching item-content.
 798                 // But for the next time we will still have old content in the item table.
 799                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow(),
 800                         'body' => '', 'title' => '', 'content-warning' => '', 'rendered-hash' => '', 'rendered-html' => '',
 801                         'object' => '', 'target' => '', 'tag' => '', 'postopts' => '', 'attach' => '', 'file' => ''];
 802                 dba::update('item', $item_fields, ['id' => $item['id']]);
 803
 804                 Term::insertFromTagFieldByItemId($item['id'], '');
 805                 Term::insertFromFileFieldByItemId($item['id'], '');
 806                 self::deleteThread($item['id'], $item['parent-uri']);
 807
 808                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 809                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 810                 }
 811
 812                 // If it's the parent of a comment thread, kill all the kids
 813                 if ($item['id'] == $item['parent']) {
 814                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 815                 }
 816
 817                 // Is it our comment and/or our thread?
 818                 if ($item['origin'] || $parent['origin']) {
 819
 820                         // When we delete the original post we will delete all existing copies on the server as well
 821                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 822
 823                         // send the notification upstream/downstream
 824                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 825                 } elseif ($item['uid'] != 0) {
 826
 827                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 828                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 829                         if (DBM::is_result($global_item)) {
 830                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 831                         }
 832                 }
 833
 834                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 835
 836                 return true;
 837         }
 838
 839         private static function deleteTagsFromItem($item)
 840         {
 841                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 842                         return;
 843                 }
 844
 845                 $xo = XML::parseString($item["object"], false);
 846                 $xt = XML::parseString($item["target"], false);
 847
 848                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 849                         return;
 850                 }
 851
 852                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 853                 if (!DBM::is_result($i)) {
 854                         return;
 855                 }
 856
 857                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 858                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 859                 $author_copy = $item["origin"];
 860
 861                 if (($owner_remove && $author_copy) || !$owner_remove) {
 862                         return;
 863                 }
 864
 865                 $tags = explode(',', $i["tag"]);
 866                 $newtags = [];
 867                 if (count($tags)) {
 868                         foreach ($tags as $tag) {
 869                                 if (trim($tag) !== trim($xo->body)) {
 870                                        $newtags[] = trim($tag);
 871                                 }
 872                         }
 873                 }
 874                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 875         }
 876
 877         private static function guid($item, $notify)
 878         {
 879                 $guid = notags(trim($item['guid']));
 880
 881                 if (!empty($guid)) {
 882                         return $guid;
 883                 }
 884
 885                 if ($notify) {
 886                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 887                         // We add the hash of our own host because our host is the original creator of the post.
 888                         $prefix_host = get_app()->get_hostname();
 889                 } else {
 890                         $prefix_host = '';
 891
 892                         // We are only storing the post so we create a GUID from the original hostname.
 893                         if (!empty($item['author-link'])) {
 894                                 $parsed = parse_url($item['author-link']);
 895                                 if (!empty($parsed['host'])) {
 896                                         $prefix_host = $parsed['host'];
 897                                 }
 898                         }
 899
 900                         if (empty($prefix_host) && !empty($item['plink'])) {
 901                                 $parsed = parse_url($item['plink']);
 902                                 if (!empty($parsed['host'])) {
 903                                         $prefix_host = $parsed['host'];
 904                                 }
 905                         }
 906
 907                         if (empty($prefix_host) && !empty($item['uri'])) {
 908                                 $parsed = parse_url($item['uri']);
 909                                 if (!empty($parsed['host'])) {
 910                                         $prefix_host = $parsed['host'];
 911                                 }
 912                         }
 913
 914                         // Is it in the format data@host.tld? - Used for mail contacts
 915                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 916                                 $mailparts = explode('@', $item['author-link']);
 917                                 $prefix_host = array_pop($mailparts);
 918                         }
 919                 }
 920
 921                 if (!empty($item['plink'])) {
 922                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 923                 } elseif (!empty($item['uri'])) {
 924                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 925                 } else {
 926                         $guid = get_guid(32, hash('crc32', $prefix_host));
 927                 }
 928
 929                 return $guid;
 930         }
 931
 932         private static function contactId($item)
 933         {
 934                 $contact_id = (int)$item["contact-id"];
 935
 936                 if (!empty($contact_id)) {
 937                         return $contact_id;
 938                 }
 939                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 940                 /*
 941                  * First we are looking for a suitable contact that matches with the author of the post
 942                  * This is done only for comments
 943                  */
 944                 if ($item['parent-uri'] != $item['uri']) {
 945                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 946                 }
 947
 948                 // If not present then maybe the owner was found
 949                 if ($contact_id == 0) {
 950                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 951                 }
 952
 953                 // Still missing? Then use the "self" contact of the current user
 954                 if ($contact_id == 0) {
 955                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 956                         if (DBM::is_result($self)) {
 957                                 $contact_id = $self["id"];
 958                         }
 959                 }
 960                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 961
 962                 return $contact_id;
 963         }
 964
 965         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 966         {
 967                 $a = get_app();
 968
 969                 // If it is a posting where users should get notifications, then define it as wall posting
 970                 if ($notify) {
 971                         $item['wall'] = 1;
 972                         $item['type'] = 'wall';
 973                         $item['origin'] = 1;
 974                         $item['network'] = NETWORK_DFRN;
 975                         $item['protocol'] = PROTOCOL_DFRN;
 976
 977                         if (is_int($notify)) {
 978                                 $priority = $notify;
 979                         } else {
 980                                 $priority = PRIORITY_HIGH;
 981                         }
 982                 } else {
 983                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 984                 }
 985
 986                 $item['guid'] = self::guid($item, $notify);
 987                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
 988
 989                 // Store conversation data
 990                 $item = Conversation::insert($item);
 991
 992                 /*
 993                  * If a Diaspora signature structure was passed in, pull it out of the
 994                  * item array and set it aside for later storage.
 995                  */
 996
 997                 $dsprsig = null;
 998                 if (x($item, 'dsprsig')) {
 999                         $encoded_signature = $item['dsprsig'];
1000                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1001                         unset($item['dsprsig']);
1002                 }
1003
1004                 if (!empty($item['diaspora_signed_text'])) {
1005                         $diaspora_signed_text = $item['diaspora_signed_text'];
1006                         unset($item['diaspora_signed_text']);
1007                 } else {
1008                         $diaspora_signed_text = '';
1009                 }
1010
1011                 // Converting the plink
1012                 /// @TODO Check if this is really still needed
1013                 if ($item['network'] == NETWORK_OSTATUS) {
1014                         if (isset($item['plink'])) {
1015                                 $item['plink'] = OStatus::convertHref($item['plink']);
1016                         } elseif (isset($item['uri'])) {
1017                                 $item['plink'] = OStatus::convertHref($item['uri']);
1018                         }
1019                 }
1020
1021                 if (!empty($item['thr-parent'])) {
1022                         $item['parent-uri'] = $item['thr-parent'];
1023                 }
1024
1025                 $item['type'] = defaults($item, 'type', 'remote');
1026
1027                 if (isset($item['gravity'])) {
1028                         $item['gravity'] = intval($item['gravity']);
1029                 } elseif ($item['parent-uri'] === $item['uri']) {
1030                         $item['gravity'] = GRAVITY_PARENT;
1031                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1032                         $item['gravity'] = GRAVITY_COMMENT;
1033                 } elseif ($item['type'] == 'activity') {
1034                         $item['gravity'] = GRAVITY_ACTIVITY;
1035                 } else {
1036                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1037                         logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
1038                 }
1039
1040                 $uid = intval($item['uid']);
1041
1042                 // check for create date and expire time
1043                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1044
1045                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
1046                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1047                         $expire_interval = $user['expire'];
1048                 }
1049
1050                 if (($expire_interval > 0) && !empty($item['created'])) {
1051                         $expire_date = time() - ($expire_interval * 86400);
1052                         $created_date = strtotime($item['created']);
1053                         if ($created_date < $expire_date) {
1054                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
1055                                 return 0;
1056                         }
1057                 }
1058
1059                 /*
1060                  * Do we already have this item?
1061                  * We have to check several networks since Friendica posts could be repeated
1062                  * via OStatus (maybe Diasporsa as well)
1063                  */
1064                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
1065                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1066                                 trim($item['uri']), $item['uid'],
1067                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
1068                         $existing = self::selectFirst(['id', 'network'], $condition);
1069                         if (DBM::is_result($existing)) {
1070                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1071                                 if ($uid != 0) {
1072                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
1073                                 }
1074
1075                                 return $existing["id"];
1076                         }
1077                 }
1078
1079                 self::addLanguageToItemArray($item);
1080
1081                 $item['wall']          = intval(defaults($item, 'wall', 0));
1082                 $item['extid']         = trim(defaults($item, 'extid', ''));
1083                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1084                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1085                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1086                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1087                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1088                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1089                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1090                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1091                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1092                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1093                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1094                 $item['title']         = trim(defaults($item, 'title', ''));
1095                 $item['location']      = trim(defaults($item, 'location', ''));
1096                 $item['coord']         = trim(defaults($item, 'coord', ''));
1097                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1098                 $item['deleted']       = 0;
1099                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1100                 $item['verb']          = trim(defaults($item, 'verb', ''));
1101                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1102                 $item['object']        = trim(defaults($item, 'object', ''));
1103                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1104                 $item['target']        = trim(defaults($item, 'target', ''));
1105                 $item['plink']         = trim(defaults($item, 'plink', ''));
1106                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1107                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1108                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1109                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1110                 $item['private']       = intval(defaults($item, 'private', 0));
1111                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1112                 $item['body']          = trim(defaults($item, 'body', ''));
1113                 $item['tag']           = trim(defaults($item, 'tag', ''));
1114                 $item['attach']        = trim(defaults($item, 'attach', ''));
1115                 $item['app']           = trim(defaults($item, 'app', ''));
1116                 $item['origin']        = intval(defaults($item, 'origin', 0));
1117                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1118                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1119                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1120                 $item['inform']        = trim(defaults($item, 'inform', ''));
1121                 $item['file']          = trim(defaults($item, 'file', ''));
1122
1123                 // When there is no content then we don't post it
1124                 if ($item['body'].$item['title'] == '') {
1125                         logger('No body, no title.');
1126                         return 0;
1127                 }
1128
1129                 // Items cannot be stored before they happen ...
1130                 if ($item['created'] > DateTimeFormat::utcNow()) {
1131                         $item['created'] = DateTimeFormat::utcNow();
1132                 }
1133
1134                 // We haven't invented time travel by now.
1135                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1136                         $item['edited'] = DateTimeFormat::utcNow();
1137                 }
1138
1139                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1140                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1141                 }
1142
1143                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1144
1145                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1146                 $item["contact-id"] = self::contactId($item);
1147
1148                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1149                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1150
1151                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1152
1153                 if (Contact::isBlocked($item["author-id"])) {
1154                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1155                         return 0;
1156                 }
1157
1158                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1159                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1160
1161                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1162
1163                 if (Contact::isBlocked($item["owner-id"])) {
1164                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1165                         return 0;
1166                 }
1167
1168                 // These fields aren't stored anymore in the item table, they are fetched upon request
1169                 unset($item['author-link']);
1170                 unset($item['author-name']);
1171                 unset($item['author-avatar']);
1172
1173                 unset($item['owner-link']);
1174                 unset($item['owner-name']);
1175                 unset($item['owner-avatar']);
1176
1177                 if ($item['network'] == NETWORK_PHANTOM) {
1178                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1179
1180                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1181                         if (!empty($contact['network'])) {
1182                                 $item['network'] = $contact["network"];
1183                         } else {
1184                                 $item['network'] = NETWORK_DFRN;
1185                         }
1186                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1187                 }
1188
1189                 // Checking if there is already an item with the same guid
1190                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1191                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1192                 if (self::exists($condition)) {
1193                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1194                         return 0;
1195                 }
1196
1197                 // Check for hashtags in the body and repair or add hashtag links
1198                 self::setHashtags($item);
1199
1200                 $item['thr-parent'] = $item['parent-uri'];
1201
1202                 $notify_type = '';
1203                 $allow_cid = '';
1204                 $allow_gid = '';
1205                 $deny_cid  = '';
1206                 $deny_gid  = '';
1207
1208                 if ($item['parent-uri'] === $item['uri']) {
1209                         $parent_id = 0;
1210                         $parent_deleted = 0;
1211                         $allow_cid = $item['allow_cid'];
1212                         $allow_gid = $item['allow_gid'];
1213                         $deny_cid  = $item['deny_cid'];
1214                         $deny_gid  = $item['deny_gid'];
1215                         $notify_type = 'wall-new';
1216                 } else {
1217                         // find the parent and snarf the item id and ACLs
1218                         // and anything else we need to inherit
1219
1220                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1221                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1222                                 'wall', 'private', 'forum_mode', 'origin'];
1223                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1224                         $params = ['order' => ['id' => false]];
1225                         $parent = self::selectFirst($fields, $condition, $params);
1226
1227                         if (DBM::is_result($parent)) {
1228                                 // is the new message multi-level threaded?
1229                                 // even though we don't support it now, preserve the info
1230                                 // and re-attach to the conversation parent.
1231
1232                                 if ($parent['uri'] != $parent['parent-uri']) {
1233                                         $item['parent-uri'] = $parent['parent-uri'];
1234
1235                                         $condition = ['uri' => $item['parent-uri'],
1236                                                 'parent-uri' => $item['parent-uri'],
1237                                                 'uid' => $item['uid']];
1238                                         $params = ['order' => ['id' => false]];
1239                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1240
1241                                         if (DBM::is_result($toplevel_parent)) {
1242                                                 $parent = $toplevel_parent;
1243                                         }
1244                                 }
1245
1246                                 $parent_id      = $parent['id'];
1247                                 $parent_deleted = $parent['deleted'];
1248                                 $allow_cid      = $parent['allow_cid'];
1249                                 $allow_gid      = $parent['allow_gid'];
1250                                 $deny_cid       = $parent['deny_cid'];
1251                                 $deny_gid       = $parent['deny_gid'];
1252                                 $item['wall']    = $parent['wall'];
1253                                 $notify_type    = 'comment-new';
1254
1255                                 /*
1256                                  * If the parent is private, force privacy for the entire conversation
1257                                  * This differs from the above settings as it subtly allows comments from
1258                                  * email correspondents to be private even if the overall thread is not.
1259                                  */
1260                                 if ($parent['private']) {
1261                                         $item['private'] = $parent['private'];
1262                                 }
1263
1264                                 /*
1265                                  * Edge case. We host a public forum that was originally posted to privately.
1266                                  * The original author commented, but as this is a comment, the permissions
1267                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1268                                  */
1269                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1270                                         $item['private'] = 0;
1271                                 }
1272
1273                                 // If its a post from myself then tag the thread as "mention"
1274                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1275                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1276                                 if (DBM::is_result($user)) {
1277                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1278                                         $self_id = Contact::getIdForURL($self, 0, true);
1279                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1280                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1281                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1282                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1283                                         }
1284                                 }
1285                         } else {
1286                                 /*
1287                                  * Allow one to see reply tweets from status.net even when
1288                                  * we don't have or can't see the original post.
1289                                  */
1290                                 if ($force_parent) {
1291                                         logger('$force_parent=true, reply converted to top-level post.');
1292                                         $parent_id = 0;
1293                                         $item['parent-uri'] = $item['uri'];
1294                                         $item['gravity'] = GRAVITY_PARENT;
1295                                 } else {
1296                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1297                                         return 0;
1298                                 }
1299
1300                                 $parent_deleted = 0;
1301                         }
1302                 }
1303
1304                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1305                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1306                 if (self::exists($condition)) {
1307                         logger('duplicated item with the same uri found. '.print_r($item,true));
1308                         return 0;
1309                 }
1310
1311                 // On Friendica and Diaspora the GUID is unique
1312                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1313                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1314                         if (self::exists($condition)) {
1315                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1316                                 return 0;
1317                         }
1318                 } else {
1319                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1320                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1321                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1322                         if (self::exists($condition)) {
1323                                 logger('duplicated item with the same body found. '.print_r($item,true));
1324                                 return 0;
1325                         }
1326                 }
1327
1328                 // Is this item available in the global items (with uid=0)?
1329                 if ($item["uid"] == 0) {
1330                         $item["global"] = true;
1331
1332                         // Set the global flag on all items if this was a global item entry
1333                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1334                 } else {
1335                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1336                 }
1337
1338                 // ACL settings
1339                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1340                         $private = 1;
1341                 } else {
1342                         $private = $item['private'];
1343                 }
1344
1345                 $item["allow_cid"] = $allow_cid;
1346                 $item["allow_gid"] = $allow_gid;
1347                 $item["deny_cid"] = $deny_cid;
1348                 $item["deny_gid"] = $deny_gid;
1349                 $item["private"] = $private;
1350                 $item["deleted"] = $parent_deleted;
1351
1352                 // Fill the cache field
1353                 put_item_in_cache($item);
1354
1355                 if ($notify) {
1356                         Addon::callHooks('post_local', $item);
1357                 } else {
1358                         Addon::callHooks('post_remote', $item);
1359                 }
1360
1361                 // This array field is used to trigger some automatic reactions
1362                 // It is mainly used in the "post_local" hook.
1363                 unset($item['api_source']);
1364
1365                 if (x($item, 'cancel')) {
1366                         logger('post cancelled by addon.');
1367                         return 0;
1368                 }
1369
1370                 /*
1371                  * Check for already added items.
1372                  * There is a timing issue here that sometimes creates double postings.
1373                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1374                  */
1375                 if ($item["uid"] == 0) {
1376                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1377                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1378                                 return 0;
1379                         }
1380                 }
1381
1382                 logger('' . print_r($item,true), LOGGER_DATA);
1383
1384                 if (array_key_exists('tag', $item)) {
1385                         $tags = $item['tag'];
1386                         unset($item['tag']);
1387                 } else {
1388                         $tags = '';
1389                 }
1390
1391                 if (array_key_exists('file', $item)) {
1392                         $files = $item['file'];
1393                         unset($item['file']);
1394                 } else {
1395                         $files = '';
1396                 }
1397
1398                 // We are doing this outside of the transaction to avoid timing problems
1399                 self::insertContent($item);
1400
1401                 dba::transaction();
1402                 $ret = dba::insert('item', $item);
1403
1404                 // When the item was successfully stored we fetch the ID of the item.
1405                 if (DBM::is_result($ret)) {
1406                         $current_post = dba::lastInsertId();
1407                 } else {
1408                         // This can happen - for example - if there are locking timeouts.
1409                         dba::rollback();
1410
1411                         // Store the data into a spool file so that we can try again later.
1412
1413                         // At first we restore the Diaspora signature that we removed above.
1414                         if (isset($encoded_signature)) {
1415                                 $item['dsprsig'] = $encoded_signature;
1416                         }
1417
1418                         // Now we store the data in the spool directory
1419                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1420                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1421
1422                         $spoolpath = get_spoolpath();
1423                         if ($spoolpath != "") {
1424                                 $spool = $spoolpath.'/'.$file;
1425                                 file_put_contents($spool, json_encode($item));
1426                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1427                         }
1428                         return 0;
1429                 }
1430
1431                 if ($current_post == 0) {
1432                         // This is one of these error messages that never should occur.
1433                         logger("couldn't find created item - we better quit now.");
1434                         dba::rollback();
1435                         return 0;
1436                 }
1437
1438                 // How much entries have we created?
1439                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1440                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1441
1442                 if ($entries > 1) {
1443                         // There are duplicates. We delete our just created entry.
1444                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1445
1446                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1447                         dba::delete('item', ['id' => $current_post]);
1448                         dba::commit();
1449                         return 0;
1450                 } elseif ($entries == 0) {
1451                         // This really should never happen since we quit earlier if there were problems.
1452                         logger("Something is terribly wrong. We haven't found our created entry.");
1453                         dba::rollback();
1454                         return 0;
1455                 }
1456
1457                 logger('created item '.$current_post);
1458                 self::updateContact($item);
1459
1460                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1461                         $parent_id = $current_post;
1462                 }
1463
1464                 // Set parent id
1465                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1466
1467                 $item['id'] = $current_post;
1468                 $item['parent'] = $parent_id;
1469
1470                 // update the commented timestamp on the parent
1471                 // Only update "commented" if it is really a comment
1472                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1473                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1474                 } else {
1475                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1476                 }
1477
1478                 if ($dsprsig) {
1479                         /*
1480                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1481                          * We can check for this condition when we decode and encode the stuff again.
1482                          */
1483                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1484                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1485                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1486                         }
1487
1488                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1489                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1490                 }
1491
1492                 if (!empty($diaspora_signed_text)) {
1493                         // Formerly we stored the signed text, the signature and the author in different fields.
1494                         // We now store the raw data so that we are more flexible.
1495                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1496                 }
1497
1498                 $deleted = self::tagDeliver($item['uid'], $current_post);
1499
1500                 /*
1501                  * current post can be deleted if is for a community page and no mention are
1502                  * in it.
1503                  */
1504                 if (!$deleted && !$dontcache) {
1505                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1506                         if (DBM::is_result($posted_item)) {
1507                                 if ($notify) {
1508                                         Addon::callHooks('post_local_end', $posted_item);
1509                                 } else {
1510                                         Addon::callHooks('post_remote_end', $posted_item);
1511                                 }
1512                         } else {
1513                                 logger('new item not found in DB, id ' . $current_post);
1514                         }
1515                 }
1516
1517                 if ($item['parent-uri'] === $item['uri']) {
1518                         self::addThread($current_post);
1519                 } else {
1520                         self::updateThread($parent_id);
1521                 }
1522
1523                 dba::commit();
1524
1525                 /*
1526                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1527                  * This is not perfect - but a workable solution until we found the reason for the problem.
1528                  */
1529                 if (!empty($tags)) {
1530                         Term::insertFromTagFieldByItemId($current_post, $tags);
1531                 }
1532
1533                 if (!empty($files)) {
1534                         Term::insertFromFileFieldByItemId($current_post, $files);
1535                 }
1536
1537                 if ($item['parent-uri'] === $item['uri']) {
1538                         self::addShadow($current_post);
1539                 } else {
1540                         self::addShadowPost($current_post);
1541                 }
1542
1543                 check_user_notification($current_post);
1544
1545                 if ($notify) {
1546                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1547                 } elseif (!empty($parent) && $parent['origin']) {
1548                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1549                 }
1550
1551                 return $current_post;
1552         }
1553
1554         /**
1555          * @brief Insert a new item content entry
1556          *
1557          * @param array $item The item fields that are to be inserted
1558          */
1559         private static function insertContent(&$item)
1560         {
1561                 $fields = ['uri' => $item['uri'], 'plink' => $item['plink'],
1562                         'uri-plink-hash' => hash('sha1', $item['plink']).hash('sha1', $item['uri'])];
1563
1564                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1565                         if (isset($item[$field])) {
1566                                 $fields[$field] = $item[$field];
1567                                 unset($item[$field]);
1568                         }
1569                 }
1570
1571                 // To avoid timing problems, we are using locks.
1572                 $locked = Lock::set('item_insert_content');
1573                 if (!$locked) {
1574                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1575                 }
1576
1577                 // Do we already have this content?
1578                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $item['uri']]);
1579                 if (DBM::is_result($item_content)) {
1580                         $item['icid'] = $item_content['id'];
1581                         logger('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1582                 } elseif (dba::insert('item-content', $fields)) {
1583                         $item['icid'] = dba::lastInsertId();
1584                         logger('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1585                 } else {
1586                         // By setting the ICID value through the worker we should avoid timing problems.
1587                         // When the locking works, this shouldn't be needed. But better be prepared.
1588                         Worker::add(PRIORITY_HIGH, 'SetItemContentID', $item['uri']);
1589                         logger('Could not insert content for URI ' . $item['uri'] . ' - trying asynchronously');
1590                 }
1591                 if ($locked) {
1592                         Lock::remove('item_insert_content');
1593                 }
1594         }
1595
1596         /**
1597          * @brief Set the item content id for a given URI
1598          *
1599          * @param string $uri The item URI
1600          */
1601         public static function setICIDforURI($uri)
1602         {
1603                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $uri]);
1604                 if (DBM::is_result($item_content)) {
1605                         dba::update('item', ['icid' => $item_content['id']], ['icid' => 0, 'uri' => $uri]);
1606                         logger('Asynchronously set item content id for URI ' . $uri . ' (' . $item_content['id'] . ') - Affected: '. (int)dba::affected_rows());
1607                 } else {
1608                         logger('No item-content found for URI ' . $uri);
1609                 }
1610         }
1611
1612         /**
1613          * @brief Update existing item content entries
1614          *
1615          * @param array $item The item fields that are to be changed
1616          * @param array $condition The condition for finding the item content entries
1617          */
1618         private static function updateContent($item, $condition)
1619         {
1620                 // We have to select only the fields from the "item-content" table
1621                 $fields = [];
1622                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1623                         if (isset($item[$field])) {
1624                                 $fields[$field] = $item[$field];
1625                         }
1626                 }
1627
1628                 if (empty($fields)) {
1629                         return;
1630                 }
1631
1632                 if (!empty($item['plink'])) {
1633                         $fields['uri-plink-hash'] = hash('sha1', $item['plink']) . hash('sha1', $condition['uri']);
1634                 } else {
1635                         // Ensure that we don't delete the plink
1636                         unset($fields['plink']);
1637                 }
1638
1639                 logger('Update content for URI ' . $condition['uri']);
1640
1641                 dba::update('item-content', $fields, $condition, true);
1642         }
1643
1644         /**
1645          * @brief Distributes public items to the receivers
1646          *
1647          * @param integer $itemid      Item ID that should be added
1648          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1649          */
1650         public static function distribute($itemid, $signed_text = '')
1651         {
1652                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1653                 $parent = self::selectFirst(['owner-id'], $condition);
1654                 if (!DBM::is_result($parent)) {
1655                         return;
1656                 }
1657
1658                 // Only distribute public items from native networks
1659                 $condition = ['id' => $itemid, 'uid' => 0,
1660                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1661                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1662                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1663                 if (!DBM::is_result($item)) {
1664                         return;
1665                 }
1666
1667                 unset($item['id']);
1668                 unset($item['parent']);
1669                 unset($item['mention']);
1670                 unset($item['wall']);
1671                 unset($item['origin']);
1672                 unset($item['starred']);
1673
1674                 $users = [];
1675
1676                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1677                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1678                 $contacts = dba::select('contact', ['uid'], $condition);
1679                 while ($contact = dba::fetch($contacts)) {
1680                         $users[$contact['uid']] = $contact['uid'];
1681                 }
1682
1683                 $origin_uid = 0;
1684
1685                 if ($item['uri'] != $item['parent-uri']) {
1686                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1687                         while ($parent = dba::fetch($parents)) {
1688                                 $users[$parent['uid']] = $parent['uid'];
1689                                 if ($parent['origin'] && !$item['origin']) {
1690                                         $origin_uid = $parent['uid'];
1691                                 }
1692                         }
1693                 }
1694
1695                 foreach ($users as $uid) {
1696                         if ($origin_uid == $uid) {
1697                                 $item['diaspora_signed_text'] = $signed_text;
1698                         }
1699                         self::storeForUser($itemid, $item, $uid);
1700                 }
1701         }
1702
1703         /**
1704          * @brief Store public items for the receivers
1705          *
1706          * @param integer $itemid Item ID that should be added
1707          * @param array   $item   The item entry that will be stored
1708          * @param integer $uid    The user that will receive the item entry
1709          */
1710         private static function storeForUser($itemid, $item, $uid)
1711         {
1712                 $item['uid'] = $uid;
1713                 $item['origin'] = 0;
1714                 $item['wall'] = 0;
1715                 if ($item['uri'] == $item['parent-uri']) {
1716                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1717                 } else {
1718                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1719                 }
1720
1721                 if (empty($item['contact-id'])) {
1722                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1723                         if (!DBM::is_result($self)) {
1724                                 return;
1725                         }
1726                         $item['contact-id'] = $self['id'];
1727                 }
1728
1729                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1730                         $item['type'] = 'remote-comment';
1731                 } elseif ($item['type'] == 'wall') {
1732                         $item['type'] = 'remote';
1733                 }
1734
1735                 /// @todo Handling of "event-id"
1736
1737                 $notify = false;
1738                 if ($item['uri'] == $item['parent-uri']) {
1739                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1740                         if (DBM::is_result($contact)) {
1741                                 $notify = self::isRemoteSelf($contact, $item);
1742                         }
1743                 }
1744
1745                 $distributed = self::insert($item, false, $notify, true);
1746
1747                 if (!$distributed) {
1748                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1749                 } else {
1750                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1751                 }
1752         }
1753
1754         /**
1755          * @brief Add a shadow entry for a given item id that is a thread starter
1756          *
1757          * We store every public item entry additionally with the user id "0".
1758          * This is used for the community page and for the search.
1759          * It is planned that in the future we will store public item entries only once.
1760          *
1761          * @param integer $itemid Item ID that should be added
1762          */
1763         public static function addShadow($itemid)
1764         {
1765                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
1766                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1767                 $item = self::selectFirst($fields, $condition);
1768
1769                 if (!DBM::is_result($item)) {
1770                         return;
1771                 }
1772
1773                 // is it already a copy?
1774                 if (($itemid == 0) || ($item['uid'] == 0)) {
1775                         return;
1776                 }
1777
1778                 // Is it a visible public post?
1779                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1780                         return;
1781                 }
1782
1783                 // is it an entry from a connector? Only add an entry for natively connected networks
1784                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1785                         return;
1786                 }
1787
1788                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1789                         return;
1790                 }
1791
1792                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1793
1794                 if (DBM::is_result($item)) {
1795                         // Preparing public shadow (removing user specific data)
1796                         $item['uid'] = 0;
1797                         unset($item['id']);
1798                         unset($item['parent']);
1799                         unset($item['wall']);
1800                         unset($item['mention']);
1801                         unset($item['origin']);
1802                         unset($item['starred']);
1803                         if ($item['uri'] == $item['parent-uri']) {
1804                                 $item['contact-id'] = $item['owner-id'];
1805                         } else {
1806                                 $item['contact-id'] = $item['author-id'];
1807                         }
1808
1809                         if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1810                                 $item['type'] = 'remote-comment';
1811                         } elseif ($item['type'] == 'wall') {
1812                                 $item['type'] = 'remote';
1813                         }
1814
1815                         $public_shadow = self::insert($item, false, false, true);
1816
1817                         logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1818                 }
1819         }
1820
1821         /**
1822          * @brief Add a shadow entry for a given item id that is a comment
1823          *
1824          * This function does the same like the function above - but for comments
1825          *
1826          * @param integer $itemid Item ID that should be added
1827          */
1828         public static function addShadowPost($itemid)
1829         {
1830                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1831                 if (!DBM::is_result($item)) {
1832                         return;
1833                 }
1834
1835                 // Is it a toplevel post?
1836                 if ($item['id'] == $item['parent']) {
1837                         self::addShadow($itemid);
1838                         return;
1839                 }
1840
1841                 // Is this a shadow entry?
1842                 if ($item['uid'] == 0) {
1843                         return;
1844                 }
1845
1846                 // Is there a shadow parent?
1847                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
1848                         return;
1849                 }
1850
1851                 // Is there already a shadow entry?
1852                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1853                         return;
1854                 }
1855
1856                 // Save "origin" and "parent" state
1857                 $origin = $item['origin'];
1858                 $parent = $item['parent'];
1859
1860                 // Preparing public shadow (removing user specific data)
1861                 $item['uid'] = 0;
1862                 unset($item['id']);
1863                 unset($item['parent']);
1864                 unset($item['wall']);
1865                 unset($item['mention']);
1866                 unset($item['origin']);
1867                 unset($item['starred']);
1868                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1869
1870                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1871                         $item['type'] = 'remote-comment';
1872                 } elseif ($item['type'] == 'wall') {
1873                         $item['type'] = 'remote';
1874                 }
1875
1876                 $public_shadow = self::insert($item, false, false, true);
1877
1878                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1879
1880                 // If this was a comment to a Diaspora post we don't get our comment back.
1881                 // This means that we have to distribute the comment by ourselves.
1882                 if ($origin && self::exists(['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1883                         self::distribute($public_shadow);
1884                 }
1885         }
1886
1887          /**
1888          * Adds a language specification in a "language" element of given $arr.
1889          * Expects "body" element to exist in $arr.
1890          */
1891         private static function addLanguageToItemArray(&$item)
1892         {
1893                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1894
1895                 $ld = new Text_LanguageDetect();
1896                 $ld->setNameMode(2);
1897                 $languages = $ld->detect($naked_body, 3);
1898
1899                 if (is_array($languages)) {
1900                         $item['language'] = json_encode($languages);
1901                 }
1902         }
1903
1904         /**
1905          * @brief Creates an unique guid out of a given uri
1906          *
1907          * @param string $uri uri of an item entry
1908          * @param string $host hostname for the GUID prefix
1909          * @return string unique guid
1910          */
1911         public static function guidFromUri($uri, $host)
1912         {
1913                 // Our regular guid routine is using this kind of prefix as well
1914                 // We have to avoid that different routines could accidentally create the same value
1915                 $parsed = parse_url($uri);
1916
1917                 // We use a hash of the hostname as prefix for the guid
1918                 $guid_prefix = hash("crc32", $host);
1919
1920                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1921                 unset($parsed["scheme"]);
1922
1923                 // Glue it together to be able to make a hash from it
1924                 $host_id = implode("/", $parsed);
1925
1926                 // We could use any hash algorithm since it isn't a security issue
1927                 $host_hash = hash("ripemd128", $host_id);
1928
1929                 return $guid_prefix.$host_hash;
1930         }
1931
1932         /**
1933          * generate an unique URI
1934          *
1935          * @param integer $uid User id
1936          * @param string $guid An existing GUID (Otherwise it will be generated)
1937          *
1938          * @return string
1939          */
1940         public static function newURI($uid, $guid = "")
1941         {
1942                 if ($guid == "") {
1943                         $guid = get_guid(32);
1944                 }
1945
1946                 $hostname = self::getApp()->get_hostname();
1947
1948                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
1949
1950                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
1951
1952                 return $uri;
1953         }
1954
1955         /**
1956          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1957          *
1958          * This can be used to filter for inactive contacts.
1959          * Only do this for public postings to avoid privacy problems, since poco data is public.
1960          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1961          *
1962          * @param array $arr Contains the just posted item record
1963          */
1964         private static function updateContact($arr)
1965         {
1966                 // Unarchive the author
1967                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1968                 if (DBM::is_result($contact)) {
1969                         Contact::unmarkForArchival($contact);
1970                 }
1971
1972                 // Unarchive the contact if it's not our own contact
1973                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1974                 if (DBM::is_result($contact)) {
1975                         Contact::unmarkForArchival($contact);
1976                 }
1977
1978                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1979
1980                 // Is it a forum? Then we don't care about the rules from above
1981                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1982                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1983                                 $update = true;
1984                         }
1985                 }
1986
1987                 if ($update) {
1988                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1989                                 ['id' => $arr['contact-id']]);
1990                 }
1991                 // Now do the same for the system wide contacts with uid=0
1992                 if (!$arr['private']) {
1993                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1994                                 ['id' => $arr['owner-id']]);
1995
1996                         if ($arr['owner-id'] != $arr['author-id']) {
1997                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1998                                         ['id' => $arr['author-id']]);
1999                         }
2000                 }
2001         }
2002
2003         public static function setHashtags(&$item)
2004         {
2005
2006                 $tags = get_tags($item["body"]);
2007
2008                 // No hashtags?
2009                 if (!count($tags)) {
2010                         return false;
2011                 }
2012
2013                 // This sorting is important when there are hashtags that are part of other hashtags
2014                 // Otherwise there could be problems with hashtags like #test and #test2
2015                 rsort($tags);
2016
2017                 $URLSearchString = "^\[\]";
2018
2019                 // All hashtags should point to the home server if "local_tags" is activated
2020                 if (Config::get('system', 'local_tags')) {
2021                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2022                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2023
2024                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2025                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2026                 }
2027
2028                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2029                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2030                         function ($match) {
2031                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2032                         }, $item["body"]);
2033
2034                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2035                         function ($match) {
2036                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2037                         }, $item["body"]);
2038
2039                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2040                         function ($match) {
2041                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2042                         }, $item["body"]);
2043
2044                 // Repair recursive urls
2045                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2046                                 "&num;$2", $item["body"]);
2047
2048                 foreach ($tags as $tag) {
2049                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
2050                                 continue;
2051                         }
2052
2053                         $basetag = str_replace('_',' ',substr($tag,1));
2054
2055                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
2056
2057                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2058
2059                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2060                                 if (strlen($item["tag"])) {
2061                                         $item["tag"] = ','.$item["tag"];
2062                                 }
2063                                 $item["tag"] = $newtag.$item["tag"];
2064                         }
2065                 }
2066
2067                 // Convert back the masked hashtags
2068                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2069         }
2070
2071         public static function getGuidById($id)
2072         {
2073                 $item = self::selectFirst(['guid'], ['id' => $id]);
2074                 if (DBM::is_result($item)) {
2075                         return $item['guid'];
2076                 } else {
2077                         return '';
2078                 }
2079         }
2080
2081         public static function getIdAndNickByGuid($guid, $uid = 0)
2082         {
2083                 $nick = "";
2084                 $id = 0;
2085
2086                 if ($uid == 0) {
2087                         $uid == local_user();
2088                 }
2089
2090                 // Does the given user have this item?
2091                 if ($uid) {
2092                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2093                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2094                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2095                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
2096                         if (DBM::is_result($item)) {
2097                                 $id = $item["id"];
2098                                 $nick = $item["nickname"];
2099                         }
2100                 }
2101
2102                 // Or is it anywhere on the server?
2103                 if ($nick == "") {
2104                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2105                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2106                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2107                                         AND NOT `item`.`private` AND `item`.`wall`
2108                                         AND `item`.`guid` = ?", $guid);
2109                         if (DBM::is_result($item)) {
2110                                 $id = $item["id"];
2111                                 $nick = $item["nickname"];
2112                         }
2113                 }
2114                 return ["nick" => $nick, "id" => $id];
2115         }
2116
2117         /**
2118          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2119          * @param int $uid
2120          * @param int $item_id
2121          * @return bool true if item was deleted, else false
2122          */
2123         private static function tagDeliver($uid, $item_id)
2124         {
2125                 $mention = false;
2126
2127                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
2128                 if (!DBM::is_result($user)) {
2129                         return;
2130                 }
2131
2132                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
2133                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
2134
2135                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2136                 if (!DBM::is_result($item)) {
2137                         return;
2138                 }
2139
2140                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
2141
2142                 /*
2143                  * Diaspora uses their own hardwired link URL in @-tags
2144                  * instead of the one we supply with webfinger
2145                  */
2146                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
2147
2148                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2149                 if ($cnt) {
2150                         foreach ($matches as $mtch) {
2151                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
2152                                         $mention = true;
2153                                         logger('mention found: ' . $mtch[2]);
2154                                 }
2155                         }
2156                 }
2157
2158                 if (!$mention) {
2159                         if (($community_page || $prvgroup) &&
2160                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2161                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2162                                 // delete it!
2163                                 logger("no-mention top-level post to community or private group. delete.");
2164                                 dba::delete('item', ['id' => $item_id]);
2165                                 return true;
2166                         }
2167                         return;
2168                 }
2169
2170                 $arr = ['item' => $item, 'user' => $user];
2171
2172                 Addon::callHooks('tagged', $arr);
2173
2174                 if (!$community_page && !$prvgroup) {
2175                         return;
2176                 }
2177
2178                 /*
2179                  * tgroup delivery - setup a second delivery chain
2180                  * prevent delivery looping - only proceed
2181                  * if the message originated elsewhere and is a top-level post
2182                  */
2183                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2184                         return;
2185                 }
2186
2187                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2188                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2189                 if (!DBM::is_result($self)) {
2190                         return;
2191                 }
2192
2193                 $owner_id = Contact::getIdForURL($self['url']);
2194
2195                 // also reset all the privacy bits to the forum default permissions
2196
2197                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2198
2199                 $forum_mode = ($prvgroup ? 2 : 1);
2200
2201                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2202                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
2203                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
2204                 dba::update('item', $fields, ['id' => $item_id]);
2205
2206                 self::updateThread($item_id);
2207
2208                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2209         }
2210
2211         public static function isRemoteSelf($contact, &$datarray)
2212         {
2213                 $a = get_app();
2214
2215                 if (!$contact['remote_self']) {
2216                         return false;
2217                 }
2218
2219                 // Prevent the forwarding of posts that are forwarded
2220                 if ($datarray["extid"] == NETWORK_DFRN) {
2221                         logger('Already forwarded', LOGGER_DEBUG);
2222                         return false;
2223                 }
2224
2225                 // Prevent to forward already forwarded posts
2226                 if ($datarray["app"] == $a->get_hostname()) {
2227                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2228                         return false;
2229                 }
2230
2231                 // Only forward posts
2232                 if ($datarray["verb"] != ACTIVITY_POST) {
2233                         logger('No post', LOGGER_DEBUG);
2234                         return false;
2235                 }
2236
2237                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2238                         logger('Not public', LOGGER_DEBUG);
2239                         return false;
2240                 }
2241
2242                 $datarray2 = $datarray;
2243                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2244                 if ($contact['remote_self'] == 2) {
2245                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2246                                         ['uid' => $contact['uid'], 'self' => true]);
2247                         if (DBM::is_result($self)) {
2248                                 $datarray['contact-id'] = $self["id"];
2249
2250                                 $datarray['owner-name'] = $self["name"];
2251                                 $datarray['owner-link'] = $self["url"];
2252                                 $datarray['owner-avatar'] = $self["thumb"];
2253
2254                                 $datarray['author-name']   = $datarray['owner-name'];
2255                                 $datarray['author-link']   = $datarray['owner-link'];
2256                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2257
2258                                 unset($datarray['created']);
2259                                 unset($datarray['edited']);
2260
2261                                 unset($datarray['network']);
2262                                 unset($datarray['owner-id']);
2263                                 unset($datarray['author-id']);
2264                         }
2265
2266                         if ($contact['network'] != NETWORK_FEED) {
2267                                 $datarray["guid"] = get_guid(32);
2268                                 unset($datarray["plink"]);
2269                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2270                                 $datarray["parent-uri"] = $datarray["uri"];
2271                                 $datarray["thr-parent"] = $datarray["uri"];
2272                                 $datarray["extid"] = NETWORK_DFRN;
2273                                 $urlpart = parse_url($datarray2['author-link']);
2274                                 $datarray["app"] = $urlpart["host"];
2275                         } else {
2276                                 $datarray['private'] = 0;
2277                         }
2278                 }
2279
2280                 if ($contact['network'] != NETWORK_FEED) {
2281                         // Store the original post
2282                         $result = self::insert($datarray2, false, false);
2283                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2284                 } else {
2285                         $datarray["app"] = "Feed";
2286                         $result = true;
2287                 }
2288
2289                 // Trigger automatic reactions for addons
2290                 $datarray['api_source'] = true;
2291
2292                 // We have to tell the hooks who we are - this really should be improved
2293                 $_SESSION["authenticated"] = true;
2294                 $_SESSION["uid"] = $contact['uid'];
2295
2296                 return $result;
2297         }
2298
2299         /**
2300          *
2301          * @param string $s
2302          * @param int    $uid
2303          * @param array  $item
2304          * @param int    $cid
2305          * @return string
2306          */
2307         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2308         {
2309                 if (Config::get('system', 'disable_embedded')) {
2310                         return $s;
2311                 }
2312
2313                 logger('check for photos', LOGGER_DEBUG);
2314                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2315
2316                 $orig_body = $s;
2317                 $new_body = '';
2318
2319                 $img_start = strpos($orig_body, '[img');
2320                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2321                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2322
2323                 while (($img_st_close !== false) && ($img_len !== false)) {
2324                         $img_st_close++; // make it point to AFTER the closing bracket
2325                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2326
2327                         logger('found photo ' . $image, LOGGER_DEBUG);
2328
2329                         if (stristr($image, $site . '/photo/')) {
2330                                 // Only embed locally hosted photos
2331                                 $replace = false;
2332                                 $i = basename($image);
2333                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2334                                 $x = strpos($i, '-');
2335
2336                                 if ($x) {
2337                                         $res = substr($i, $x + 1);
2338                                         $i = substr($i, 0, $x);
2339                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2340                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2341                                         if (DBM::is_result($photo)) {
2342                                                 /*
2343                                                  * Check to see if we should replace this photo link with an embedded image
2344                                                  * 1. No need to do so if the photo is public
2345                                                  * 2. If there's a contact-id provided, see if they're in the access list
2346                                                  *    for the photo. If so, embed it.
2347                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2348                                                  *    permissions, regardless of order but first check to see if they're an exact
2349                                                  *    match to save some processing overhead.
2350                                                  */
2351                                                 if (self::hasPermissions($photo)) {
2352                                                         if ($cid) {
2353                                                                 $recips = self::enumeratePermissions($photo);
2354                                                                 if (in_array($cid, $recips)) {
2355                                                                         $replace = true;
2356                                                                 }
2357                                                         } elseif ($item) {
2358                                                                 if (self::samePermissions($item, $photo)) {
2359                                                                         $replace = true;
2360                                                                 }
2361                                                         }
2362                                                 }
2363                                                 if ($replace) {
2364                                                         $data = $photo['data'];
2365                                                         $type = $photo['type'];
2366
2367                                                         // If a custom width and height were specified, apply before embedding
2368                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2369                                                                 logger('scaling photo', LOGGER_DEBUG);
2370
2371                                                                 $width = intval($match[1]);
2372                                                                 $height = intval($match[2]);
2373
2374                                                                 $Image = new Image($data, $type);
2375                                                                 if ($Image->isValid()) {
2376                                                                         $Image->scaleDown(max($width, $height));
2377                                                                         $data = $Image->asString();
2378                                                                         $type = $Image->getType();
2379                                                                 }
2380                                                         }
2381
2382                                                         logger('replacing photo', LOGGER_DEBUG);
2383                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2384                                                         logger('replaced: ' . $image, LOGGER_DATA);
2385                                                 }
2386                                         }
2387                                 }
2388                         }
2389
2390                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2391                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2392                         if ($orig_body === false) {
2393                                 $orig_body = '';
2394                         }
2395
2396                         $img_start = strpos($orig_body, '[img');
2397                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2398                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2399                 }
2400
2401                 $new_body = $new_body . $orig_body;
2402
2403                 return $new_body;
2404         }
2405
2406         private static function hasPermissions($obj)
2407         {
2408                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2409                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2410         }
2411
2412         private static function samePermissions($obj1, $obj2)
2413         {
2414                 // first part is easy. Check that these are exactly the same.
2415                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2416                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2417                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2418                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2419                         return true;
2420                 }
2421
2422                 // This is harder. Parse all the permissions and compare the resulting set.
2423                 $recipients1 = self::enumeratePermissions($obj1);
2424                 $recipients2 = self::enumeratePermissions($obj2);
2425                 sort($recipients1);
2426                 sort($recipients2);
2427
2428                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2429                 return ($recipients1 == $recipients2);
2430         }
2431
2432         // returns an array of contact-ids that are allowed to see this object
2433         private static function enumeratePermissions($obj)
2434         {
2435                 $allow_people = expand_acl($obj['allow_cid']);
2436                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2437                 $deny_people  = expand_acl($obj['deny_cid']);
2438                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2439                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2440                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2441                 $recipients   = array_diff($recipients, $deny);
2442                 return $recipients;
2443         }
2444
2445         public static function getFeedTags($item)
2446         {
2447                 $ret = [];
2448                 $matches = false;
2449                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2450                 if ($cnt) {
2451                         for ($x = 0; $x < $cnt; $x ++) {
2452                                 if ($matches[1][$x]) {
2453                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2454                                 }
2455                         }
2456                 }
2457                 $matches = false;
2458                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2459                 if ($cnt) {
2460                         for ($x = 0; $x < $cnt; $x ++) {
2461                                 if ($matches[1][$x]) {
2462                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2463                                 }
2464                         }
2465                 }
2466                 return $ret;
2467         }
2468
2469         public static function expire($uid, $days, $network = "", $force = false)
2470         {
2471                 if (!$uid || ($days < 1)) {
2472                         return;
2473                 }
2474
2475                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2476                         $uid, GRAVITY_PARENT];
2477
2478                 /*
2479                  * $expire_network_only = save your own wall posts
2480                  * and just expire conversations started by others
2481                  */
2482                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
2483
2484                 if ($expire_network_only) {
2485                         $condition[0] .= " AND NOT `wall`";
2486                 }
2487
2488                 if ($network != "") {
2489                         $condition[0] .= " AND `network` = ?";
2490                         $condition[] = $network;
2491
2492                         /*
2493                          * There is an index "uid_network_received" but not "uid_network_created"
2494                          * This avoids the creation of another index just for one purpose.
2495                          * And it doesn't really matter wether to look at "received" or "created"
2496                          */
2497                         $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2498                         $condition[] = $days;
2499                 } else {
2500                         $condition[0] .= " AND `created` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2501                         $condition[] = $days;
2502                 }
2503
2504                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id'], $condition);
2505
2506                 if (!DBM::is_result($items)) {
2507                         return;
2508                 }
2509
2510                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
2511
2512                 // Forcing expiring of items - but not notes and marked items
2513                 if ($force) {
2514                         $expire_items = true;
2515                 }
2516
2517                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
2518                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
2519                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
2520
2521                 logger('User ' . $uid . ": expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2522
2523                 while ($item = Item::fetch($items)) {
2524                         // don't expire filed items
2525
2526                         if (strpos($item['file'], '[') !== false) {
2527                                 continue;
2528                         }
2529
2530                         // Only expire posts, not photos and photo comments
2531
2532                         if (!$expire_photos && strlen($item['resource-id'])) {
2533                                 continue;
2534                         } elseif (!$expire_starred && intval($item['starred'])) {
2535                                 continue;
2536                         } elseif (!$expire_notes && $item['type'] == 'note') {
2537                                 continue;
2538                         } elseif (!$expire_items && $item['type'] != 'note') {
2539                                 continue;
2540                         }
2541
2542                         self::deleteById($item['id'], PRIORITY_LOW);
2543                 }
2544                 dba::close($items);
2545         }
2546
2547         public static function firstPostDate($uid, $wall = false)
2548         {
2549                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2550                 $params = ['order' => ['created' => false]];
2551                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2552                 if (DBM::is_result($thread)) {
2553                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2554                 }
2555                 return false;
2556         }
2557
2558         /**
2559          * @brief add/remove activity to an item
2560          *
2561          * Toggle activities as like,dislike,attend of an item
2562          *
2563          * @param string $item_id
2564          * @param string $verb
2565          *              Activity verb. One of
2566          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2567          *                      attendno, unattendno, attendmaybe, unattendmaybe
2568          * @hook 'post_local_end'
2569          *              array $arr
2570          *                      'post_id' => ID of posted item
2571          */
2572         public static function performLike($item_id, $verb)
2573         {
2574                 if (!local_user() && !remote_user()) {
2575                         return false;
2576                 }
2577
2578                 switch ($verb) {
2579                         case 'like':
2580                         case 'unlike':
2581                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
2582                                 $activity = ACTIVITY_LIKE;
2583                                 break;
2584                         case 'dislike':
2585                         case 'undislike':
2586                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
2587                                 $activity = ACTIVITY_DISLIKE;
2588                                 break;
2589                         case 'attendyes':
2590                         case 'unattendyes':
2591                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
2592                                 $activity = ACTIVITY_ATTEND;
2593                                 break;
2594                         case 'attendno':
2595                         case 'unattendno':
2596                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
2597                                 $activity = ACTIVITY_ATTENDNO;
2598                                 break;
2599                         case 'attendmaybe':
2600                         case 'unattendmaybe':
2601                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
2602                                 $activity = ACTIVITY_ATTENDMAYBE;
2603                                 break;
2604                         default:
2605                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2606                                 return false;
2607                 }
2608
2609                 // Enable activity toggling instead of on/off
2610                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2611
2612                 logger('like: verb ' . $verb . ' item ' . $item_id);
2613
2614                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2615                 if (!DBM::is_result($item)) {
2616                         logger('like: unknown item ' . $item_id);
2617                         return false;
2618                 }
2619
2620                 $uid = $item['uid'];
2621                 if (($uid == 0) && local_user()) {
2622                         $uid = local_user();
2623                 }
2624
2625                 if (!can_write_wall($uid)) {
2626                         logger('like: unable to write on wall ' . $uid);
2627                         return false;
2628                 }
2629
2630                 // Retrieves the local post owner
2631                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2632                 if (!DBM::is_result($owner_self_contact)) {
2633                         logger('like: unknown owner ' . $uid);
2634                         return false;
2635                 }
2636
2637                 // Retrieve the current logged in user's public contact
2638                 $author_id = public_contact();
2639
2640                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
2641                 if (!DBM::is_result($author_contact)) {
2642                         logger('like: unknown author ' . $author_id);
2643                         return false;
2644                 }
2645
2646                 // Contact-id is the uid-dependant author contact
2647                 if (local_user() == $uid) {
2648                         $item_contact_id = $owner_self_contact['id'];
2649                         $item_contact = $owner_self_contact;
2650                 } else {
2651                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2652                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2653                         if (!DBM::is_result($item_contact)) {
2654                                 logger('like: unknown item contact ' . $item_contact_id);
2655                                 return false;
2656                         }
2657                 }
2658
2659                 // Look for an existing verb row
2660                 // event participation are essentially radio toggles. If you make a subsequent choice,
2661                 // we need to eradicate your first choice.
2662                 if ($event_verb_flag) {
2663                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
2664                 } else {
2665                         $verbs = $activity;
2666                 }
2667
2668                 $base_condition = ['verb' => $verbs, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2669                         'author-id' => $author_contact['id'], 'uid' => item['uid']];
2670
2671                 $condition = array_merge($base_condition, ['parent' => $item_id]);
2672                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2673
2674                 if (!DBM::is_result($like_item)) {
2675                         $condition = array_merge($base_condition, ['parent-uri' => $item_id]);
2676                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2677                 }
2678
2679                 if (!DBM::is_result($like_item)) {
2680                         $condition = array_merge($base_condition, ['thr-parent' => $item_id]);
2681                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2682                 }
2683
2684                 // If it exists, mark it as deleted
2685                 if (DBM::is_result($like_item)) {
2686                         // Already voted, undo it
2687                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2688                         /// @todo Consider using self::update - but before doing so, check the side effects
2689                         dba::update('item', $fields, ['id' => $like_item['id']]);
2690
2691                         // Clean up the Diaspora signatures for this like
2692                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
2693                         // if it had been enabled in the past
2694                         dba::delete('sign', ['iid' => $like_item['id']]);
2695
2696                         $like_item_id = $like_item['id'];
2697                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
2698
2699                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2700                                 return true;
2701                         }
2702                 }
2703
2704                 // Verb is "un-something", just trying to delete existing entries
2705                 if (strpos($verb, 'un') === 0) {
2706                         return true;
2707                 }
2708
2709                 // Else or if event verb different from existing row, create a new item row
2710                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2711                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2712                         $post_type = L10n::t('event');
2713                 }
2714                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2715                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2716                 $body = $item['body'];
2717
2718                 $obj = <<< EOT
2719
2720                 <object>
2721                         <type>$objtype</type>
2722                         <local>1</local>
2723                         <id>{$item['uri']}</id>
2724                         <link>$link</link>
2725                         <title></title>
2726                         <content>$body</content>
2727                 </object>
2728 EOT;
2729
2730                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2731                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2732                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2733
2734                 $new_item = [
2735                         'guid'          => get_guid(32),
2736                         'uri'           => self::newURI($item['uid']),
2737                         'uid'           => $item['uid'],
2738                         'contact-id'    => $item_contact_id,
2739                         'type'          => 'activity',
2740                         'wall'          => $item['wall'],
2741                         'origin'        => 1,
2742                         'gravity'       => GRAVITY_ACTIVITY,
2743                         'parent'        => $item['id'],
2744                         'parent-uri'    => $item['uri'],
2745                         'thr-parent'    => $item['uri'],
2746                         'owner-id'      => $item['owner-id'],
2747                         'owner-name'    => $item['owner-name'],
2748                         'owner-link'    => $item['owner-link'],
2749                         'owner-avatar'  => $item['owner-avatar'],
2750                         'author-id'     => $author_contact['id'],
2751                         'author-name'   => $author_contact['name'],
2752                         'author-link'   => $author_contact['url'],
2753                         'author-avatar' => $author_contact['thumb'],
2754                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2755                         'verb'          => $activity,
2756                         'object-type'   => $objtype,
2757                         'object'        => $obj,
2758                         'allow_cid'     => $item['allow_cid'],
2759                         'allow_gid'     => $item['allow_gid'],
2760                         'deny_cid'      => $item['deny_cid'],
2761                         'deny_gid'      => $item['deny_gid'],
2762                         'visible'       => 1,
2763                         'unseen'        => 1,
2764                 ];
2765
2766                 $new_item_id = self::insert($new_item);
2767
2768                 // If the parent item isn't visible then set it to visible
2769                 if (!$item['visible']) {
2770                         self::update(['visible' => true], ['id' => $item['id']]);
2771                 }
2772
2773                 // Save the author information for the like in case we need to relay to Diaspora
2774                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2775
2776                 $new_item['id'] = $new_item_id;
2777
2778                 Addon::callHooks('post_local_end', $new_item);
2779
2780                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2781
2782                 return true;
2783         }
2784
2785         private static function addThread($itemid, $onlyshadow = false)
2786         {
2787                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2788                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2789                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2790                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2791                 $item = self::selectFirst($fields, $condition);
2792
2793                 if (!DBM::is_result($item)) {
2794                         return;
2795                 }
2796
2797                 $item['iid'] = $itemid;
2798
2799                 if (!$onlyshadow) {
2800                         $result = dba::insert('thread', $item);
2801
2802                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2803                 }
2804         }
2805
2806         private static function updateThread($itemid, $setmention = false)
2807         {
2808                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
2809                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2810                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
2811                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2812
2813                 $item = self::selectFirst($fields, $condition);
2814                 if (!DBM::is_result($item)) {
2815                         return;
2816                 }
2817
2818                 if ($setmention) {
2819                         $item["mention"] = 1;
2820                 }
2821
2822                 $sql = "";
2823
2824                 $fields = [];
2825
2826                 foreach ($item as $field => $data) {
2827                         if (!in_array($field, ["guid"])) {
2828                                 $fields[$field] = $data;
2829                         }
2830                 }
2831
2832                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2833
2834                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2835         }
2836
2837         private static function deleteThread($itemid, $itemuri = "")
2838         {
2839                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2840                 if (!DBM::is_result($item)) {
2841                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2842                         return;
2843                 }
2844
2845                 // Using dba::delete at this time could delete the associated item entries
2846                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2847
2848                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2849
2850                 if ($itemuri != "") {
2851                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2852                         if (!self::exists($condition)) {
2853                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2854                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2855                         }
2856                 }
2857         }
2858 }