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                 /// @todo This is a preparation
 126                 // Build the file string out of the term entries
 127                 //if (isset($row['id']) && array_key_exists('file', $row)) {
 128                 //      $row['file'] = Term::fileTextFromItemId($row['id']);
 129                 //}
 130
 131                 // We can always comment on posts from these networks
 132                 if (isset($row['writable']) && !empty($row['network']) &&
 133                         in_array($row['network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
 134                         $row['writable'] = true;
 135                 }
 136
 137                 return $row;
 138         }
 139
 140         /**
 141          * @brief Fills an array with data from an item query
 142          *
 143          * @param object $stmt statement object
 144          * @return array Data array
 145          */
 146         public static function inArray($stmt, $do_close = true) {
 147                 if (is_bool($stmt)) {
 148                         return $stmt;
 149                 }
 150
 151                 $data = [];
 152                 while ($row = self::fetch($stmt)) {
 153                         $data[] = $row;
 154                 }
 155                 if ($do_close) {
 156                         dba::close($stmt);
 157                 }
 158                 return $data;
 159         }
 160
 161         /**
 162          * @brief Check if item data exists
 163          *
 164          * @param array $condition array of fields for condition
 165          *
 166          * @return boolean Are there rows for that condition?
 167          */
 168         public static function exists($condition) {
 169                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 170
 171                 if (is_bool($stmt)) {
 172                         $retval = $stmt;
 173                 } else {
 174                         $retval = (dba::num_rows($stmt) > 0);
 175                 }
 176
 177                 dba::close($stmt);
 178
 179                 return $retval;
 180         }
 181
 182         /**
 183          * Retrieve a single record from the item table for a given user and returns it in an associative array
 184          *
 185          * @brief Retrieve a single record from a table
 186          * @param integer $uid User ID
 187          * @param array  $fields
 188          * @param array  $condition
 189          * @param array  $params
 190          * @return bool|array
 191          * @see dba::select
 192          */
 193         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 194         {
 195                 $params['uid'] = $uid;
 196
 197                 if (empty($selected)) {
 198                         $selected = Item::DISPLAY_FIELDLIST;
 199                 }
 200
 201                 return self::selectFirst($selected, $condition, $params);
 202         }
 203
 204         /**
 205          * @brief Select rows from the item table for a given user
 206          *
 207          * @param integer $uid User ID
 208          * @param array  $selected  Array of selected fields, empty for all
 209          * @param array  $condition Array of fields for condition
 210          * @param array  $params    Array of several parameters
 211          *
 212          * @return boolean|object
 213          */
 214         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 215         {
 216                 $params['uid'] = $uid;
 217
 218                 if (empty($selected)) {
 219                         $selected = Item::DISPLAY_FIELDLIST;
 220                 }
 221
 222                 return self::select($selected, $condition, $params);
 223         }
 224
 225         /**
 226          * Retrieve a single record from the item table and returns it in an associative array
 227          *
 228          * @brief Retrieve a single record from a table
 229          * @param array  $fields
 230          * @param array  $condition
 231          * @param array  $params
 232          * @return bool|array
 233          * @see dba::select
 234          */
 235         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 236         {
 237                 $params['limit'] = 1;
 238
 239                 $result = self::select($fields, $condition, $params);
 240
 241                 if (is_bool($result)) {
 242                         return $result;
 243                 } else {
 244                         $row = self::fetch($result);
 245                         dba::close($result);
 246                         return $row;
 247                 }
 248         }
 249
 250         /**
 251          * @brief Select rows from the item table
 252          *
 253          * @param array  $selected  Array of selected fields, empty for all
 254          * @param array  $condition Array of fields for condition
 255          * @param array  $params    Array of several parameters
 256          *
 257          * @return boolean|object
 258          */
 259         public static function select(array $selected = [], array $condition = [], $params = [])
 260         {
 261                 $uid = 0;
 262                 $usermode = false;
 263
 264                 if (isset($params['uid'])) {
 265                         $uid = $params['uid'];
 266                         $usermode = true;
 267                 }
 268
 269                 $fields = self::fieldlist($selected);
 270
 271                 $select_fields = self::constructSelectFields($fields, $selected);
 272
 273                 $condition_string = dba::buildCondition($condition);
 274
 275                 $condition_string = self::addTablesToFields($condition_string, $fields);
 276
 277                 if ($usermode) {
 278                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 279                 }
 280
 281                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 282
 283                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false);
 284
 285                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 286
 287                 return dba::p($sql, $condition);
 288         }
 289
 290         /**
 291          * @brief Select rows from the starting post in the item table
 292          *
 293          * @param integer $uid User ID
 294          * @param array  $fields    Array of selected fields, empty for all
 295          * @param array  $condition Array of fields for condition
 296          * @param array  $params    Array of several parameters
 297          *
 298          * @return boolean|object
 299          */
 300         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 301         {
 302                 $params['uid'] = $uid;
 303
 304                 if (empty($selected)) {
 305                         $selected = Item::DISPLAY_FIELDLIST;
 306                 }
 307
 308                 return self::selectThread($selected, $condition, $params);
 309         }
 310
 311         /**
 312          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 313          *
 314          * @brief Retrieve a single record from a table
 315          * @param integer $uid User ID
 316          * @param array  $selected
 317          * @param array  $condition
 318          * @param array  $params
 319          * @return bool|array
 320          * @see dba::select
 321          */
 322         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 323         {
 324                 $params['uid'] = $uid;
 325
 326                 if (empty($selected)) {
 327                         $selected = Item::DISPLAY_FIELDLIST;
 328                 }
 329
 330                 return self::selectFirstThread($selected, $condition, $params);
 331         }
 332
 333         /**
 334          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 335          *
 336          * @brief Retrieve a single record from a table
 337          * @param array  $fields
 338          * @param array  $condition
 339          * @param array  $params
 340          * @return bool|array
 341          * @see dba::select
 342          */
 343         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 344         {
 345                 $params['limit'] = 1;
 346                 $result = self::selectThread($fields, $condition, $params);
 347
 348                 if (is_bool($result)) {
 349                         return $result;
 350                 } else {
 351                         $row = self::fetch($result);
 352                         dba::close($result);
 353                         return $row;
 354                 }
 355         }
 356
 357         /**
 358          * @brief Select rows from the starting post in the item table
 359          *
 360          * @param array  $selected  Array of selected fields, empty for all
 361          * @param array  $condition Array of fields for condition
 362          * @param array  $params    Array of several parameters
 363          *
 364          * @return boolean|object
 365          */
 366         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 367         {
 368                 $uid = 0;
 369                 $usermode = false;
 370
 371                 if (isset($params['uid'])) {
 372                         $uid = $params['uid'];
 373                         $usermode = true;
 374                 }
 375
 376                 $fields = self::fieldlist($selected);
 377
 378                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 379                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 380                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 381                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 382
 383                 $select_fields = self::constructSelectFields($fields, $selected);
 384
 385                 $condition_string = dba::buildCondition($condition);
 386
 387                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 388                 $condition_string = self::addTablesToFields($condition_string, $fields);
 389
 390                 if ($usermode) {
 391                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 392                 }
 393
 394                 $param_string = dba::buildParameter($params);
 395                 $param_string = self::addTablesToFields($param_string, $threadfields);
 396                 $param_string = self::addTablesToFields($param_string, $fields);
 397
 398                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true);
 399
 400                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 401
 402                 return dba::p($sql, $condition);
 403         }
 404
 405         /**
 406          * @brief Returns a list of fields that are associated with the item table
 407          *
 408          * @return array field list
 409          */
 410         private static function fieldlist($selected)
 411         {
 412                 $fields = [];
 413
 414                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 415                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 416                         'created', 'edited', 'commented', 'received', 'changed', 'postopts',
 417                         'resource-id', 'event-id', 'tag', 'attach', 'inform',
 418                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 419                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 420                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 421                         'id' => 'item_id', 'network', 'icid'];
 422
 423                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 424
 425                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 426                         'thumb' => 'author-avatar', 'nick' => 'author-nick'];
 427
 428                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 429                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick'];
 430
 431                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 432                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 433                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 434
 435                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 436
 437                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 438
 439                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 440                         'start' => 'event-start','finish' => 'event-finish',
 441                         'summary' => 'event-summary','desc' => 'event-desc',
 442                         'location' => 'event-location', 'type' => 'event-type',
 443                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 444                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 445
 446                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 447
 448                 return $fields;
 449         }
 450
 451         /**
 452          * @brief Returns SQL condition for the "select" functions
 453          *
 454          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 455          *
 456          * @return string SQL condition
 457          */
 458         private static function condition($thread_mode)
 459         {
 460                 if ($thread_mode) {
 461                         $master_table = "`thread`";
 462                 } else {
 463                         $master_table = "`item`";
 464                 }
 465                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 466         }
 467
 468         /**
 469          * @brief Returns all needed "JOIN" commands for the "select" functions
 470          *
 471          * @param integer $uid User ID
 472          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 473          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 474          *
 475          * @return string The SQL joins for the "select" functions
 476          */
 477         private static function constructJoins($uid, $sql_commands, $thread_mode)
 478         {
 479                 if ($thread_mode) {
 480                         $master_table = "`thread`";
 481                         $master_table_key = "`thread`.`iid`";
 482                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 483                 } else {
 484                         $master_table = "`item`";
 485                         $master_table_key = "`item`.`id`";
 486                         $joins = '';
 487                 }
 488
 489                 $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 490                         AND NOT `contact`.`blocked`
 491                         AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 492                         OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 493                         STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 494                         STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 495                         LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 496                         CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 497
 498                 if (strpos($sql_commands, "`group_member`.") !== false) {
 499                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 500                 }
 501
 502                 if (strpos($sql_commands, "`user`.") !== false) {
 503                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 504                 }
 505
 506                 if (strpos($sql_commands, "`event`.") !== false) {
 507                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 508                 }
 509
 510                 if (strpos($sql_commands, "`sign`.") !== false) {
 511                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 512                 }
 513
 514                 if (strpos($sql_commands, "`item-content`.") !== false) {
 515                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
 516                 }
 517
 518                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 519                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 520                 }
 521
 522                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 523                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 524                 }
 525
 526                 return $joins;
 527         }
 528
 529         /**
 530          * @brief Add the field list for the "select" functions
 531          *
 532          * @param array $fields The field definition array
 533          * @param array $selected The array with the selected fields from the "select" functions
 534          *
 535          * @return string The field list
 536          */
 537         private static function constructSelectFields($fields, $selected)
 538         {
 539                 // To be able to fetch the tags we need the item id
 540                 if (in_array('tag', $selected) && !in_array('id', $selected)) {
 541                         $selected[] = 'id';
 542                 }
 543
 544                 /// @todo This is a preparation
 545                 // To be able to fetch the files we need the item id
 546                 //if (in_array('file', $selected) && !in_array('id', $selected)) {
 547                 //      $selected[] = 'id';
 548                 //}
 549
 550                 $selection = [];
 551                 foreach ($fields as $table => $table_fields) {
 552                         foreach ($table_fields as $field => $select) {
 553                                 if (empty($selected) || in_array($select, $selected)) {
 554                                         if (in_array($select, self::MIXED_CONTENT_FIELDLIST)) {
 555                                                 $selection[] = "`item`.`".$select."` AS `item-" . $select . "`";
 556                                         }
 557                                         if (is_int($field)) {
 558                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 559                                         } else {
 560                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 561                                         }
 562                                 }
 563                         }
 564                 }
 565                 return implode(", ", $selection);
 566         }
 567
 568         /**
 569          * @brief add table definition to fields in an SQL query
 570          *
 571          * @param string $query SQL query
 572          * @param array $fields The field definition array
 573          *
 574          * @return string the changed SQL query
 575          */
 576         private static function addTablesToFields($query, $fields)
 577         {
 578                 foreach ($fields as $table => $table_fields) {
 579                         foreach ($table_fields as $alias => $field) {
 580                                 if (is_int($alias)) {
 581                                         $replace_field = $field;
 582                                 } else {
 583                                         $replace_field = $alias;
 584                                 }
 585
 586                                 $search = "/([^\.])`" . $field . "`/i";
 587                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 588                                 $query = preg_replace($search, $replace, $query);
 589                         }
 590                 }
 591                 return $query;
 592         }
 593
 594         /**
 595          * @brief Update existing item entries
 596          *
 597          * @param array $fields The fields that are to be changed
 598          * @param array $condition The condition for finding the item entries
 599          *
 600          * In the future we may have to change permissions as well.
 601          * Then we had to add the user id as third parameter.
 602          *
 603          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 604          *
 605          * @return integer|boolean number of affected rows - or "false" if there was an error
 606          */
 607         public static function update(array $fields, array $condition)
 608         {
 609                 if (empty($condition) || empty($fields)) {
 610                         return false;
 611                 }
 612
 613                 // To ensure the data integrity we do it in an transaction
 614                 dba::transaction();
 615
 616                 // We cannot simply expand the condition to check for origin entries
 617                 // The condition needn't to be a simple array but could be a complex condition.
 618                 // And we have to execute this query before the update to ensure to fetch the same data.
 619                 $items = dba::select('item', ['id', 'origin', 'uri', 'plink'], $condition);
 620
 621                 $content_fields = [];
 622                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 623                         if (isset($fields[$field])) {
 624                                 $content_fields[$field] = $fields[$field];
 625                                 unset($fields[$field]);
 626                         }
 627                 }
 628
 629                 if (array_key_exists('tag', $fields)) {
 630                         $tags = $fields['tag'];
 631                         unset($fields['tag']);
 632                 } else {
 633                         $tags = '';
 634                 }
 635
 636                 if (array_key_exists('file', $fields)) {
 637                         $files = $fields['file'];
 638                         /// @todo This is a preparation
 639                         //unset($fields['file']);
 640                 } else {
 641                         $files = '';
 642                 }
 643
 644                 if (!empty($fields)) {
 645                         $success = dba::update('item', $fields, $condition);
 646
 647                         if (!$success) {
 648                                 dba::close($items);
 649                                 dba::rollback();
 650                                 return false;
 651                         }
 652                 }
 653
 654                 // When there is no content for the "old" item table, this will count the fetched items
 655                 $rows = dba::affected_rows();
 656
 657                 while ($item = dba::fetch($items)) {
 658                         if (!empty($item['plink'])) {
 659                                 $content_fields['plink'] =  $item['plink'];
 660                         }
 661                         self::updateContent($content_fields, ['uri' => $item['uri']]);
 662
 663                         if (!empty($tags)) {
 664                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
 665                         }
 666
 667                         if (!empty($files)) {
 668                                 Term::insertFromFileFieldByItemId($item['id'], $files);
 669                         }
 670
 671                         self::updateThread($item['id']);
 672
 673                         // We only need to notfiy others when it is an original entry from us.
 674                         // Only call the notifier when the item has some content relevant change.
 675                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 676                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 677                         }
 678                 }
 679
 680                 dba::close($items);
 681                 dba::commit();
 682                 return $rows;
 683         }
 684
 685         /**
 686          * @brief Delete an item and notify others about it - if it was ours
 687          *
 688          * @param array $condition The condition for finding the item entries
 689          * @param integer $priority Priority for the notification
 690          */
 691         public static function delete($condition, $priority = PRIORITY_HIGH)
 692         {
 693                 $items = dba::select('item', ['id'], $condition);
 694                 while ($item = dba::fetch($items)) {
 695                         self::deleteById($item['id'], $priority);
 696                 }
 697                 dba::close($items);
 698         }
 699
 700         /**
 701          * @brief Delete an item for an user and notify others about it - if it was ours
 702          *
 703          * @param array $condition The condition for finding the item entries
 704          * @param integer $uid User who wants to delete this item
 705          */
 706         public static function deleteForUser($condition, $uid)
 707         {
 708                 if ($uid == 0) {
 709                         return;
 710                 }
 711
 712                 $items = dba::select('item', ['id', 'uid'], $condition);
 713                 while ($item = dba::fetch($items)) {
 714                         // "Deleting" global items just means hiding them
 715                         if ($item['uid'] == 0) {
 716                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 717                         } elseif ($item['uid'] == $uid) {
 718                                 self::deleteById($item['id'], PRIORITY_HIGH);
 719                         } else {
 720                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 721                         }
 722                 }
 723                 dba::close($items);
 724         }
 725
 726         /**
 727          * @brief Delete an item and notify others about it - if it was ours
 728          *
 729          * @param integer $item_id Item ID that should be delete
 730          * @param integer $priority Priority for the notification
 731          *
 732          * @return boolean success
 733          */
 734         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 735         {
 736                 // locate item to be deleted
 737                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 738                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 739                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 740                 $item = self::selectFirst($fields, ['id' => $item_id]);
 741                 if (!DBM::is_result($item)) {
 742                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 743                         return false;
 744                 }
 745
 746                 if ($item['deleted']) {
 747                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 748                         return false;
 749                 }
 750
 751                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
 752                 if (!DBM::is_result($parent)) {
 753                         $parent = ['origin' => false];
 754                 }
 755
 756                 // clean up categories and tags so they don't end up as orphans
 757
 758                 $matches = false;
 759                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 760                 if ($cnt) {
 761                         foreach ($matches as $mtch) {
 762                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 763                         }
 764                 }
 765
 766                 $matches = false;
 767
 768                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 769                 if ($cnt) {
 770                         foreach ($matches as $mtch) {
 771                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 772                         }
 773                 }
 774
 775                 /*
 776                  * If item is a link to a photo resource, nuke all the associated photos
 777                  * (visitors will not have photo resources)
 778                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 779                  * generate a resource-id and therefore aren't intimately linked to the item.
 780                  */
 781                 if (strlen($item['resource-id'])) {
 782                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 783                 }
 784
 785                 // If item is a link to an event, delete the event.
 786                 if (intval($item['event-id'])) {
 787                         Event::delete($item['event-id']);
 788                 }
 789
 790                 // If item has attachments, drop them
 791                 foreach (explode(", ", $item['attach']) as $attach) {
 792                         preg_match("|attach/(\d+)|", $attach, $matches);
 793                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 794                 }
 795
 796                 // Delete tags that had been attached to other items
 797                 self::deleteTagsFromItem($item);
 798
 799                 // Set the item to "deleted"
 800                 // This erasing of item content is superfluous for items with a matching item-content.
 801                 // But for the next time we will still have old content in the item table.
 802                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow(),
 803                         'body' => '', 'title' => '', 'content-warning' => '', 'rendered-hash' => '', 'rendered-html' => '',
 804                         'object' => '', 'target' => '', 'tag' => '', 'postopts' => '', 'attach' => '', 'file' => ''];
 805                 dba::update('item', $item_fields, ['id' => $item['id']]);
 806
 807                 Term::insertFromTagFieldByItemId($item['id'], '');
 808                 Term::insertFromFileFieldByItemId($item['id'], '');
 809                 self::deleteThread($item['id'], $item['parent-uri']);
 810
 811                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 812                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 813                 }
 814
 815                 // If it's the parent of a comment thread, kill all the kids
 816                 if ($item['id'] == $item['parent']) {
 817                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 818                 }
 819
 820                 // Is it our comment and/or our thread?
 821                 if ($item['origin'] || $parent['origin']) {
 822
 823                         // When we delete the original post we will delete all existing copies on the server as well
 824                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 825
 826                         // send the notification upstream/downstream
 827                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 828                 } elseif ($item['uid'] != 0) {
 829
 830                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 831                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 832                         if (DBM::is_result($global_item)) {
 833                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 834                         }
 835                 }
 836
 837                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 838
 839                 return true;
 840         }
 841
 842         private static function deleteTagsFromItem($item)
 843         {
 844                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 845                         return;
 846                 }
 847
 848                 $xo = XML::parseString($item["object"], false);
 849                 $xt = XML::parseString($item["target"], false);
 850
 851                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 852                         return;
 853                 }
 854
 855                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 856                 if (!DBM::is_result($i)) {
 857                         return;
 858                 }
 859
 860                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 861                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 862                 $author_copy = $item["origin"];
 863
 864                 if (($owner_remove && $author_copy) || !$owner_remove) {
 865                         return;
 866                 }
 867
 868                 $tags = explode(',', $i["tag"]);
 869                 $newtags = [];
 870                 if (count($tags)) {
 871                         foreach ($tags as $tag) {
 872                                 if (trim($tag) !== trim($xo->body)) {
 873                                        $newtags[] = trim($tag);
 874                                 }
 875                         }
 876                 }
 877                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 878         }
 879
 880         private static function guid($item, $notify)
 881         {
 882                 $guid = notags(trim($item['guid']));
 883
 884                 if (!empty($guid)) {
 885                         return $guid;
 886                 }
 887
 888                 if ($notify) {
 889                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 890                         // We add the hash of our own host because our host is the original creator of the post.
 891                         $prefix_host = get_app()->get_hostname();
 892                 } else {
 893                         $prefix_host = '';
 894
 895                         // We are only storing the post so we create a GUID from the original hostname.
 896                         if (!empty($item['author-link'])) {
 897                                 $parsed = parse_url($item['author-link']);
 898                                 if (!empty($parsed['host'])) {
 899                                         $prefix_host = $parsed['host'];
 900                                 }
 901                         }
 902
 903                         if (empty($prefix_host) && !empty($item['plink'])) {
 904                                 $parsed = parse_url($item['plink']);
 905                                 if (!empty($parsed['host'])) {
 906                                         $prefix_host = $parsed['host'];
 907                                 }
 908                         }
 909
 910                         if (empty($prefix_host) && !empty($item['uri'])) {
 911                                 $parsed = parse_url($item['uri']);
 912                                 if (!empty($parsed['host'])) {
 913                                         $prefix_host = $parsed['host'];
 914                                 }
 915                         }
 916
 917                         // Is it in the format data@host.tld? - Used for mail contacts
 918                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 919                                 $mailparts = explode('@', $item['author-link']);
 920                                 $prefix_host = array_pop($mailparts);
 921                         }
 922                 }
 923
 924                 if (!empty($item['plink'])) {
 925                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 926                 } elseif (!empty($item['uri'])) {
 927                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 928                 } else {
 929                         $guid = get_guid(32, hash('crc32', $prefix_host));
 930                 }
 931
 932                 return $guid;
 933         }
 934
 935         private static function contactId($item)
 936         {
 937                 $contact_id = (int)$item["contact-id"];
 938
 939                 if (!empty($contact_id)) {
 940                         return $contact_id;
 941                 }
 942                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 943                 /*
 944                  * First we are looking for a suitable contact that matches with the author of the post
 945                  * This is done only for comments
 946                  */
 947                 if ($item['parent-uri'] != $item['uri']) {
 948                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 949                 }
 950
 951                 // If not present then maybe the owner was found
 952                 if ($contact_id == 0) {
 953                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 954                 }
 955
 956                 // Still missing? Then use the "self" contact of the current user
 957                 if ($contact_id == 0) {
 958                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 959                         if (DBM::is_result($self)) {
 960                                 $contact_id = $self["id"];
 961                         }
 962                 }
 963                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 964
 965                 return $contact_id;
 966         }
 967
 968         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 969         {
 970                 $a = get_app();
 971
 972                 // If it is a posting where users should get notifications, then define it as wall posting
 973                 if ($notify) {
 974                         $item['wall'] = 1;
 975                         $item['type'] = 'wall';
 976                         $item['origin'] = 1;
 977                         $item['network'] = NETWORK_DFRN;
 978                         $item['protocol'] = PROTOCOL_DFRN;
 979
 980                         if (is_int($notify)) {
 981                                 $priority = $notify;
 982                         } else {
 983                                 $priority = PRIORITY_HIGH;
 984                         }
 985                 } else {
 986                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 987                 }
 988
 989                 $item['guid'] = self::guid($item, $notify);
 990                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
 991
 992                 // Store conversation data
 993                 $item = Conversation::insert($item);
 994
 995                 /*
 996                  * If a Diaspora signature structure was passed in, pull it out of the
 997                  * item array and set it aside for later storage.
 998                  */
 999
1000                 $dsprsig = null;
1001                 if (x($item, 'dsprsig')) {
1002                         $encoded_signature = $item['dsprsig'];
1003                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1004                         unset($item['dsprsig']);
1005                 }
1006
1007                 if (!empty($item['diaspora_signed_text'])) {
1008                         $diaspora_signed_text = $item['diaspora_signed_text'];
1009                         unset($item['diaspora_signed_text']);
1010                 } else {
1011                         $diaspora_signed_text = '';
1012                 }
1013
1014                 // Converting the plink
1015                 /// @TODO Check if this is really still needed
1016                 if ($item['network'] == NETWORK_OSTATUS) {
1017                         if (isset($item['plink'])) {
1018                                 $item['plink'] = OStatus::convertHref($item['plink']);
1019                         } elseif (isset($item['uri'])) {
1020                                 $item['plink'] = OStatus::convertHref($item['uri']);
1021                         }
1022                 }
1023
1024                 if (!empty($item['thr-parent'])) {
1025                         $item['parent-uri'] = $item['thr-parent'];
1026                 }
1027
1028                 $item['type'] = defaults($item, 'type', 'remote');
1029
1030                 if (isset($item['gravity'])) {
1031                         $item['gravity'] = intval($item['gravity']);
1032                 } elseif ($item['parent-uri'] === $item['uri']) {
1033                         $item['gravity'] = GRAVITY_PARENT;
1034                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1035                         $item['gravity'] = GRAVITY_COMMENT;
1036                 } elseif ($item['type'] == 'activity') {
1037                         $item['gravity'] = GRAVITY_ACTIVITY;
1038                 } else {
1039                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1040                         logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
1041                 }
1042
1043                 $uid = intval($item['uid']);
1044
1045                 // check for create date and expire time
1046                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1047
1048                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
1049                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1050                         $expire_interval = $user['expire'];
1051                 }
1052
1053                 if (($expire_interval > 0) && !empty($item['created'])) {
1054                         $expire_date = time() - ($expire_interval * 86400);
1055                         $created_date = strtotime($item['created']);
1056                         if ($created_date < $expire_date) {
1057                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
1058                                 return 0;
1059                         }
1060                 }
1061
1062                 /*
1063                  * Do we already have this item?
1064                  * We have to check several networks since Friendica posts could be repeated
1065                  * via OStatus (maybe Diasporsa as well)
1066                  */
1067                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
1068                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1069                                 trim($item['uri']), $item['uid'],
1070                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
1071                         $existing = self::selectFirst(['id', 'network'], $condition);
1072                         if (DBM::is_result($existing)) {
1073                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1074                                 if ($uid != 0) {
1075                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
1076                                 }
1077
1078                                 return $existing["id"];
1079                         }
1080                 }
1081
1082                 self::addLanguageToItemArray($item);
1083
1084                 $item['wall']          = intval(defaults($item, 'wall', 0));
1085                 $item['extid']         = trim(defaults($item, 'extid', ''));
1086                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1087                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1088                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1089                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1090                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1091                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1092                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1093                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1094                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1095                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1096                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1097                 $item['title']         = trim(defaults($item, 'title', ''));
1098                 $item['location']      = trim(defaults($item, 'location', ''));
1099                 $item['coord']         = trim(defaults($item, 'coord', ''));
1100                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1101                 $item['deleted']       = 0;
1102                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1103                 $item['verb']          = trim(defaults($item, 'verb', ''));
1104                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1105                 $item['object']        = trim(defaults($item, 'object', ''));
1106                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1107                 $item['target']        = trim(defaults($item, 'target', ''));
1108                 $item['plink']         = trim(defaults($item, 'plink', ''));
1109                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1110                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1111                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1112                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1113                 $item['private']       = intval(defaults($item, 'private', 0));
1114                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1115                 $item['body']          = trim(defaults($item, 'body', ''));
1116                 $item['tag']           = trim(defaults($item, 'tag', ''));
1117                 $item['attach']        = trim(defaults($item, 'attach', ''));
1118                 $item['app']           = trim(defaults($item, 'app', ''));
1119                 $item['origin']        = intval(defaults($item, 'origin', 0));
1120                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1121                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1122                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1123                 $item['inform']        = trim(defaults($item, 'inform', ''));
1124                 $item['file']          = trim(defaults($item, 'file', ''));
1125
1126                 // When there is no content then we don't post it
1127                 if ($item['body'].$item['title'] == '') {
1128                         logger('No body, no title.');
1129                         return 0;
1130                 }
1131
1132                 // Items cannot be stored before they happen ...
1133                 if ($item['created'] > DateTimeFormat::utcNow()) {
1134                         $item['created'] = DateTimeFormat::utcNow();
1135                 }
1136
1137                 // We haven't invented time travel by now.
1138                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1139                         $item['edited'] = DateTimeFormat::utcNow();
1140                 }
1141
1142                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1143                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1144                 }
1145
1146                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1147
1148                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1149                 $item["contact-id"] = self::contactId($item);
1150
1151                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1152                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1153
1154                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1155
1156                 if (Contact::isBlocked($item["author-id"])) {
1157                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1158                         return 0;
1159                 }
1160
1161                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1162                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1163
1164                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1165
1166                 if (Contact::isBlocked($item["owner-id"])) {
1167                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1168                         return 0;
1169                 }
1170
1171                 // These fields aren't stored anymore in the item table, they are fetched upon request
1172                 unset($item['author-link']);
1173                 unset($item['author-name']);
1174                 unset($item['author-avatar']);
1175
1176                 unset($item['owner-link']);
1177                 unset($item['owner-name']);
1178                 unset($item['owner-avatar']);
1179
1180                 if ($item['network'] == NETWORK_PHANTOM) {
1181                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1182
1183                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1184                         if (!empty($contact['network'])) {
1185                                 $item['network'] = $contact["network"];
1186                         } else {
1187                                 $item['network'] = NETWORK_DFRN;
1188                         }
1189                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1190                 }
1191
1192                 // Checking if there is already an item with the same guid
1193                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1194                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1195                 if (self::exists($condition)) {
1196                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1197                         return 0;
1198                 }
1199
1200                 // Check for hashtags in the body and repair or add hashtag links
1201                 self::setHashtags($item);
1202
1203                 $item['thr-parent'] = $item['parent-uri'];
1204
1205                 $notify_type = '';
1206                 $allow_cid = '';
1207                 $allow_gid = '';
1208                 $deny_cid  = '';
1209                 $deny_gid  = '';
1210
1211                 if ($item['parent-uri'] === $item['uri']) {
1212                         $parent_id = 0;
1213                         $parent_deleted = 0;
1214                         $allow_cid = $item['allow_cid'];
1215                         $allow_gid = $item['allow_gid'];
1216                         $deny_cid  = $item['deny_cid'];
1217                         $deny_gid  = $item['deny_gid'];
1218                         $notify_type = 'wall-new';
1219                 } else {
1220                         // find the parent and snarf the item id and ACLs
1221                         // and anything else we need to inherit
1222
1223                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1224                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1225                                 'wall', 'private', 'forum_mode', 'origin'];
1226                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1227                         $params = ['order' => ['id' => false]];
1228                         $parent = self::selectFirst($fields, $condition, $params);
1229
1230                         if (DBM::is_result($parent)) {
1231                                 // is the new message multi-level threaded?
1232                                 // even though we don't support it now, preserve the info
1233                                 // and re-attach to the conversation parent.
1234
1235                                 if ($parent['uri'] != $parent['parent-uri']) {
1236                                         $item['parent-uri'] = $parent['parent-uri'];
1237
1238                                         $condition = ['uri' => $item['parent-uri'],
1239                                                 'parent-uri' => $item['parent-uri'],
1240                                                 'uid' => $item['uid']];
1241                                         $params = ['order' => ['id' => false]];
1242                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1243
1244                                         if (DBM::is_result($toplevel_parent)) {
1245                                                 $parent = $toplevel_parent;
1246                                         }
1247                                 }
1248
1249                                 $parent_id      = $parent['id'];
1250                                 $parent_deleted = $parent['deleted'];
1251                                 $allow_cid      = $parent['allow_cid'];
1252                                 $allow_gid      = $parent['allow_gid'];
1253                                 $deny_cid       = $parent['deny_cid'];
1254                                 $deny_gid       = $parent['deny_gid'];
1255                                 $item['wall']    = $parent['wall'];
1256                                 $notify_type    = 'comment-new';
1257
1258                                 /*
1259                                  * If the parent is private, force privacy for the entire conversation
1260                                  * This differs from the above settings as it subtly allows comments from
1261                                  * email correspondents to be private even if the overall thread is not.
1262                                  */
1263                                 if ($parent['private']) {
1264                                         $item['private'] = $parent['private'];
1265                                 }
1266
1267                                 /*
1268                                  * Edge case. We host a public forum that was originally posted to privately.
1269                                  * The original author commented, but as this is a comment, the permissions
1270                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1271                                  */
1272                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1273                                         $item['private'] = 0;
1274                                 }
1275
1276                                 // If its a post from myself then tag the thread as "mention"
1277                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1278                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1279                                 if (DBM::is_result($user)) {
1280                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1281                                         $self_id = Contact::getIdForURL($self, 0, true);
1282                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1283                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1284                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1285                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1286                                         }
1287                                 }
1288                         } else {
1289                                 /*
1290                                  * Allow one to see reply tweets from status.net even when
1291                                  * we don't have or can't see the original post.
1292                                  */
1293                                 if ($force_parent) {
1294                                         logger('$force_parent=true, reply converted to top-level post.');
1295                                         $parent_id = 0;
1296                                         $item['parent-uri'] = $item['uri'];
1297                                         $item['gravity'] = GRAVITY_PARENT;
1298                                 } else {
1299                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1300                                         return 0;
1301                                 }
1302
1303                                 $parent_deleted = 0;
1304                         }
1305                 }
1306
1307                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1308                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1309                 if (self::exists($condition)) {
1310                         logger('duplicated item with the same uri found. '.print_r($item,true));
1311                         return 0;
1312                 }
1313
1314                 // On Friendica and Diaspora the GUID is unique
1315                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1316                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1317                         if (self::exists($condition)) {
1318                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1319                                 return 0;
1320                         }
1321                 } else {
1322                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1323                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1324                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1325                         if (self::exists($condition)) {
1326                                 logger('duplicated item with the same body found. '.print_r($item,true));
1327                                 return 0;
1328                         }
1329                 }
1330
1331                 // Is this item available in the global items (with uid=0)?
1332                 if ($item["uid"] == 0) {
1333                         $item["global"] = true;
1334
1335                         // Set the global flag on all items if this was a global item entry
1336                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1337                 } else {
1338                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1339                 }
1340
1341                 // ACL settings
1342                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1343                         $private = 1;
1344                 } else {
1345                         $private = $item['private'];
1346                 }
1347
1348                 $item["allow_cid"] = $allow_cid;
1349                 $item["allow_gid"] = $allow_gid;
1350                 $item["deny_cid"] = $deny_cid;
1351                 $item["deny_gid"] = $deny_gid;
1352                 $item["private"] = $private;
1353                 $item["deleted"] = $parent_deleted;
1354
1355                 // Fill the cache field
1356                 put_item_in_cache($item);
1357
1358                 if ($notify) {
1359                         Addon::callHooks('post_local', $item);
1360                 } else {
1361                         Addon::callHooks('post_remote', $item);
1362                 }
1363
1364                 // This array field is used to trigger some automatic reactions
1365                 // It is mainly used in the "post_local" hook.
1366                 unset($item['api_source']);
1367
1368                 if (x($item, 'cancel')) {
1369                         logger('post cancelled by addon.');
1370                         return 0;
1371                 }
1372
1373                 /*
1374                  * Check for already added items.
1375                  * There is a timing issue here that sometimes creates double postings.
1376                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1377                  */
1378                 if ($item["uid"] == 0) {
1379                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1380                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1381                                 return 0;
1382                         }
1383                 }
1384
1385                 logger('' . print_r($item,true), LOGGER_DATA);
1386
1387                 if (array_key_exists('tag', $item)) {
1388                         $tags = $item['tag'];
1389                         unset($item['tag']);
1390                 } else {
1391                         $tags = '';
1392                 }
1393
1394                 if (array_key_exists('file', $item)) {
1395                         $files = $item['file'];
1396                         /// @todo This is a preparation
1397                         //unset($item['file']);
1398                 } else {
1399                         $files = '';
1400                 }
1401
1402                 // We are doing this outside of the transaction to avoid timing problems
1403                 self::insertContent($item);
1404
1405                 dba::transaction();
1406                 $ret = dba::insert('item', $item);
1407
1408                 // When the item was successfully stored we fetch the ID of the item.
1409                 if (DBM::is_result($ret)) {
1410                         $current_post = dba::lastInsertId();
1411                 } else {
1412                         // This can happen - for example - if there are locking timeouts.
1413                         dba::rollback();
1414
1415                         // Store the data into a spool file so that we can try again later.
1416
1417                         // At first we restore the Diaspora signature that we removed above.
1418                         if (isset($encoded_signature)) {
1419                                 $item['dsprsig'] = $encoded_signature;
1420                         }
1421
1422                         // Now we store the data in the spool directory
1423                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1424                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1425
1426                         $spoolpath = get_spoolpath();
1427                         if ($spoolpath != "") {
1428                                 $spool = $spoolpath.'/'.$file;
1429                                 file_put_contents($spool, json_encode($item));
1430                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1431                         }
1432                         return 0;
1433                 }
1434
1435                 if ($current_post == 0) {
1436                         // This is one of these error messages that never should occur.
1437                         logger("couldn't find created item - we better quit now.");
1438                         dba::rollback();
1439                         return 0;
1440                 }
1441
1442                 // How much entries have we created?
1443                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1444                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1445
1446                 if ($entries > 1) {
1447                         // There are duplicates. We delete our just created entry.
1448                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1449
1450                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1451                         dba::delete('item', ['id' => $current_post]);
1452                         dba::commit();
1453                         return 0;
1454                 } elseif ($entries == 0) {
1455                         // This really should never happen since we quit earlier if there were problems.
1456                         logger("Something is terribly wrong. We haven't found our created entry.");
1457                         dba::rollback();
1458                         return 0;
1459                 }
1460
1461                 logger('created item '.$current_post);
1462                 self::updateContact($item);
1463
1464                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1465                         $parent_id = $current_post;
1466                 }
1467
1468                 // Set parent id
1469                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1470
1471                 $item['id'] = $current_post;
1472                 $item['parent'] = $parent_id;
1473
1474                 // update the commented timestamp on the parent
1475                 // Only update "commented" if it is really a comment
1476                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1477                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1478                 } else {
1479                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1480                 }
1481
1482                 if ($dsprsig) {
1483                         /*
1484                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1485                          * We can check for this condition when we decode and encode the stuff again.
1486                          */
1487                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1488                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1489                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1490                         }
1491
1492                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1493                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1494                 }
1495
1496                 if (!empty($diaspora_signed_text)) {
1497                         // Formerly we stored the signed text, the signature and the author in different fields.
1498                         // We now store the raw data so that we are more flexible.
1499                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1500                 }
1501
1502                 $deleted = self::tagDeliver($item['uid'], $current_post);
1503
1504                 /*
1505                  * current post can be deleted if is for a community page and no mention are
1506                  * in it.
1507                  */
1508                 if (!$deleted && !$dontcache) {
1509                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1510                         if (DBM::is_result($posted_item)) {
1511                                 if ($notify) {
1512                                         Addon::callHooks('post_local_end', $posted_item);
1513                                 } else {
1514                                         Addon::callHooks('post_remote_end', $posted_item);
1515                                 }
1516                         } else {
1517                                 logger('new item not found in DB, id ' . $current_post);
1518                         }
1519                 }
1520
1521                 if ($item['parent-uri'] === $item['uri']) {
1522                         self::addThread($current_post);
1523                 } else {
1524                         self::updateThread($parent_id);
1525                 }
1526
1527                 dba::commit();
1528
1529                 /*
1530                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1531                  * This is not perfect - but a workable solution until we found the reason for the problem.
1532                  */
1533                 if (!empty($tags)) {
1534                         Term::insertFromTagFieldByItemId($current_post, $tags);
1535                 }
1536
1537                 if (!empty($files)) {
1538                         Term::insertFromFileFieldByItemId($current_post, $files);
1539                 }
1540
1541                 if ($item['parent-uri'] === $item['uri']) {
1542                         self::addShadow($current_post);
1543                 } else {
1544                         self::addShadowPost($current_post);
1545                 }
1546
1547                 check_user_notification($current_post);
1548
1549                 if ($notify) {
1550                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1551                 } elseif (!empty($parent) && $parent['origin']) {
1552                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1553                 }
1554
1555                 return $current_post;
1556         }
1557
1558         /**
1559          * @brief Insert a new item content entry
1560          *
1561          * @param array $item The item fields that are to be inserted
1562          */
1563         private static function insertContent(&$item)
1564         {
1565                 $fields = ['uri' => $item['uri'], 'plink' => $item['plink'],
1566                         'uri-plink-hash' => hash('sha1', $item['plink']).hash('sha1', $item['uri'])];
1567
1568                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1569                         if (isset($item[$field])) {
1570                                 $fields[$field] = $item[$field];
1571                                 unset($item[$field]);
1572                         }
1573                 }
1574
1575                 // To avoid timing problems, we are using locks.
1576                 $locked = Lock::set('item_insert_content');
1577                 if (!$locked) {
1578                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1579                 }
1580
1581                 // Do we already have this content?
1582                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $item['uri']]);
1583                 if (DBM::is_result($item_content)) {
1584                         $item['icid'] = $item_content['id'];
1585                         logger('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1586                 } elseif (dba::insert('item-content', $fields)) {
1587                         $item['icid'] = dba::lastInsertId();
1588                         logger('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1589                 } else {
1590                         // By setting the ICID value through the worker we should avoid timing problems.
1591                         // When the locking works, this shouldn't be needed. But better be prepared.
1592                         Worker::add(PRIORITY_HIGH, 'SetItemContentID', $item['uri']);
1593                         logger('Could not insert content for URI ' . $item['uri'] . ' - trying asynchronously');
1594                 }
1595                 if ($locked) {
1596                         Lock::remove('item_insert_content');
1597                 }
1598         }
1599
1600         /**
1601          * @brief Set the item content id for a given URI
1602          *
1603          * @param string $uri The item URI
1604          */
1605         public static function setICIDforURI($uri)
1606         {
1607                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $uri]);
1608                 if (DBM::is_result($item_content)) {
1609                         dba::update('item', ['icid' => $item_content['id']], ['icid' => 0, 'uri' => $uri]);
1610                         logger('Asynchronously set item content id for URI ' . $uri . ' (' . $item_content['id'] . ') - Affected: '. (int)dba::affected_rows());
1611                 } else {
1612                         logger('No item-content found for URI ' . $uri);
1613                 }
1614         }
1615
1616         /**
1617          * @brief Update existing item content entries
1618          *
1619          * @param array $item The item fields that are to be changed
1620          * @param array $condition The condition for finding the item content entries
1621          */
1622         private static function updateContent($item, $condition)
1623         {
1624                 // We have to select only the fields from the "item-content" table
1625                 $fields = [];
1626                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1627                         if (isset($item[$field])) {
1628                                 $fields[$field] = $item[$field];
1629                         }
1630                 }
1631
1632                 if (empty($fields)) {
1633                         return;
1634                 }
1635
1636                 if (!empty($item['plink'])) {
1637                         $fields['uri-plink-hash'] = hash('sha1', $item['plink']) . hash('sha1', $condition['uri']);
1638                 } else {
1639                         // Ensure that we don't delete the plink
1640                         unset($fields['plink']);
1641                 }
1642
1643                 logger('Update content for URI ' . $condition['uri']);
1644
1645                 dba::update('item-content', $fields, $condition, true);
1646         }
1647
1648         /**
1649          * @brief Distributes public items to the receivers
1650          *
1651          * @param integer $itemid      Item ID that should be added
1652          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1653          */
1654         public static function distribute($itemid, $signed_text = '')
1655         {
1656                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1657                 $parent = self::selectFirst(['owner-id'], $condition);
1658                 if (!DBM::is_result($parent)) {
1659                         return;
1660                 }
1661
1662                 // Only distribute public items from native networks
1663                 $condition = ['id' => $itemid, 'uid' => 0,
1664                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1665                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1666                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1667                 if (!DBM::is_result($item)) {
1668                         return;
1669                 }
1670
1671                 unset($item['id']);
1672                 unset($item['parent']);
1673                 unset($item['mention']);
1674                 unset($item['wall']);
1675                 unset($item['origin']);
1676                 unset($item['starred']);
1677
1678                 $users = [];
1679
1680                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1681                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1682                 $contacts = dba::select('contact', ['uid'], $condition);
1683                 while ($contact = dba::fetch($contacts)) {
1684                         $users[$contact['uid']] = $contact['uid'];
1685                 }
1686
1687                 $origin_uid = 0;
1688
1689                 if ($item['uri'] != $item['parent-uri']) {
1690                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1691                         while ($parent = dba::fetch($parents)) {
1692                                 $users[$parent['uid']] = $parent['uid'];
1693                                 if ($parent['origin'] && !$item['origin']) {
1694                                         $origin_uid = $parent['uid'];
1695                                 }
1696                         }
1697                 }
1698
1699                 foreach ($users as $uid) {
1700                         if ($origin_uid == $uid) {
1701                                 $item['diaspora_signed_text'] = $signed_text;
1702                         }
1703                         self::storeForUser($itemid, $item, $uid);
1704                 }
1705         }
1706
1707         /**
1708          * @brief Store public items for the receivers
1709          *
1710          * @param integer $itemid Item ID that should be added
1711          * @param array   $item   The item entry that will be stored
1712          * @param integer $uid    The user that will receive the item entry
1713          */
1714         private static function storeForUser($itemid, $item, $uid)
1715         {
1716                 $item['uid'] = $uid;
1717                 $item['origin'] = 0;
1718                 $item['wall'] = 0;
1719                 if ($item['uri'] == $item['parent-uri']) {
1720                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1721                 } else {
1722                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1723                 }
1724
1725                 if (empty($item['contact-id'])) {
1726                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1727                         if (!DBM::is_result($self)) {
1728                                 return;
1729                         }
1730                         $item['contact-id'] = $self['id'];
1731                 }
1732
1733                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1734                         $item['type'] = 'remote-comment';
1735                 } elseif ($item['type'] == 'wall') {
1736                         $item['type'] = 'remote';
1737                 }
1738
1739                 /// @todo Handling of "event-id"
1740
1741                 $notify = false;
1742                 if ($item['uri'] == $item['parent-uri']) {
1743                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1744                         if (DBM::is_result($contact)) {
1745                                 $notify = self::isRemoteSelf($contact, $item);
1746                         }
1747                 }
1748
1749                 $distributed = self::insert($item, false, $notify, true);
1750
1751                 if (!$distributed) {
1752                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1753                 } else {
1754                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1755                 }
1756         }
1757
1758         /**
1759          * @brief Add a shadow entry for a given item id that is a thread starter
1760          *
1761          * We store every public item entry additionally with the user id "0".
1762          * This is used for the community page and for the search.
1763          * It is planned that in the future we will store public item entries only once.
1764          *
1765          * @param integer $itemid Item ID that should be added
1766          */
1767         public static function addShadow($itemid)
1768         {
1769                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network'];
1770                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1771                 $item = self::selectFirst($fields, $condition);
1772
1773                 if (!DBM::is_result($item)) {
1774                         return;
1775                 }
1776
1777                 // is it already a copy?
1778                 if (($itemid == 0) || ($item['uid'] == 0)) {
1779                         return;
1780                 }
1781
1782                 // Is it a visible public post?
1783                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1784                         return;
1785                 }
1786
1787                 // is it an entry from a connector? Only add an entry for natively connected networks
1788                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1789                         return;
1790                 }
1791
1792                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1793
1794                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
1795                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
1796
1797                         if (!self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1798                                 // Preparing public shadow (removing user specific data)
1799                                 $item['uid'] = 0;
1800                                 unset($item['id']);
1801                                 unset($item['parent']);
1802                                 unset($item['wall']);
1803                                 unset($item['mention']);
1804                                 unset($item['origin']);
1805                                 unset($item['starred']);
1806                                 if ($item['uri'] == $item['parent-uri']) {
1807                                         $item['contact-id'] = $item['owner-id'];
1808                                 } else {
1809                                         $item['contact-id'] = $item['author-id'];
1810                                 }
1811
1812                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1813                                         $item['type'] = 'remote-comment';
1814                                 } elseif ($item['type'] == 'wall') {
1815                                         $item['type'] = 'remote';
1816                                 }
1817
1818                                 $public_shadow = self::insert($item, false, false, true);
1819
1820                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1821                         }
1822                 }
1823         }
1824
1825         /**
1826          * @brief Add a shadow entry for a given item id that is a comment
1827          *
1828          * This function does the same like the function above - but for comments
1829          *
1830          * @param integer $itemid Item ID that should be added
1831          */
1832         public static function addShadowPost($itemid)
1833         {
1834                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1835                 if (!DBM::is_result($item)) {
1836                         return;
1837                 }
1838
1839                 // Is it a toplevel post?
1840                 if ($item['id'] == $item['parent']) {
1841                         self::addShadow($itemid);
1842                         return;
1843                 }
1844
1845                 // Is this a shadow entry?
1846                 if ($item['uid'] == 0) {
1847                         return;
1848                 }
1849
1850                 // Is there a shadow parent?
1851                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
1852                         return;
1853                 }
1854
1855                 // Is there already a shadow entry?
1856                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1857                         return;
1858                 }
1859
1860                 // Save "origin" and "parent" state
1861                 $origin = $item['origin'];
1862                 $parent = $item['parent'];
1863
1864                 // Preparing public shadow (removing user specific data)
1865                 $item['uid'] = 0;
1866                 unset($item['id']);
1867                 unset($item['parent']);
1868                 unset($item['wall']);
1869                 unset($item['mention']);
1870                 unset($item['origin']);
1871                 unset($item['starred']);
1872                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1873
1874                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1875                         $item['type'] = 'remote-comment';
1876                 } elseif ($item['type'] == 'wall') {
1877                         $item['type'] = 'remote';
1878                 }
1879
1880                 $public_shadow = self::insert($item, false, false, true);
1881
1882                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1883
1884                 // If this was a comment to a Diaspora post we don't get our comment back.
1885                 // This means that we have to distribute the comment by ourselves.
1886                 if ($origin && self::exists(['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1887                         self::distribute($public_shadow);
1888                 }
1889         }
1890
1891          /**
1892          * Adds a language specification in a "language" element of given $arr.
1893          * Expects "body" element to exist in $arr.
1894          */
1895         private static function addLanguageToItemArray(&$item)
1896         {
1897                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1898
1899                 $ld = new Text_LanguageDetect();
1900                 $ld->setNameMode(2);
1901                 $languages = $ld->detect($naked_body, 3);
1902
1903                 if (is_array($languages)) {
1904                         $item['language'] = json_encode($languages);
1905                 }
1906         }
1907
1908         /**
1909          * @brief Creates an unique guid out of a given uri
1910          *
1911          * @param string $uri uri of an item entry
1912          * @param string $host hostname for the GUID prefix
1913          * @return string unique guid
1914          */
1915         public static function guidFromUri($uri, $host)
1916         {
1917                 // Our regular guid routine is using this kind of prefix as well
1918                 // We have to avoid that different routines could accidentally create the same value
1919                 $parsed = parse_url($uri);
1920
1921                 // We use a hash of the hostname as prefix for the guid
1922                 $guid_prefix = hash("crc32", $host);
1923
1924                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1925                 unset($parsed["scheme"]);
1926
1927                 // Glue it together to be able to make a hash from it
1928                 $host_id = implode("/", $parsed);
1929
1930                 // We could use any hash algorithm since it isn't a security issue
1931                 $host_hash = hash("ripemd128", $host_id);
1932
1933                 return $guid_prefix.$host_hash;
1934         }
1935
1936         /**
1937          * generate an unique URI
1938          *
1939          * @param integer $uid User id
1940          * @param string $guid An existing GUID (Otherwise it will be generated)
1941          *
1942          * @return string
1943          */
1944         public static function newURI($uid, $guid = "")
1945         {
1946                 if ($guid == "") {
1947                         $guid = get_guid(32);
1948                 }
1949
1950                 $hostname = self::getApp()->get_hostname();
1951
1952                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
1953
1954                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
1955
1956                 return $uri;
1957         }
1958
1959         /**
1960          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1961          *
1962          * This can be used to filter for inactive contacts.
1963          * Only do this for public postings to avoid privacy problems, since poco data is public.
1964          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1965          *
1966          * @param array $arr Contains the just posted item record
1967          */
1968         private static function updateContact($arr)
1969         {
1970                 // Unarchive the author
1971                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1972                 if (DBM::is_result($contact)) {
1973                         Contact::unmarkForArchival($contact);
1974                 }
1975
1976                 // Unarchive the contact if it's not our own contact
1977                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1978                 if (DBM::is_result($contact)) {
1979                         Contact::unmarkForArchival($contact);
1980                 }
1981
1982                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1983
1984                 // Is it a forum? Then we don't care about the rules from above
1985                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1986                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1987                                 $update = true;
1988                         }
1989                 }
1990
1991                 if ($update) {
1992                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1993                                 ['id' => $arr['contact-id']]);
1994                 }
1995                 // Now do the same for the system wide contacts with uid=0
1996                 if (!$arr['private']) {
1997                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1998                                 ['id' => $arr['owner-id']]);
1999
2000                         if ($arr['owner-id'] != $arr['author-id']) {
2001                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2002                                         ['id' => $arr['author-id']]);
2003                         }
2004                 }
2005         }
2006
2007         public static function setHashtags(&$item)
2008         {
2009
2010                 $tags = get_tags($item["body"]);
2011
2012                 // No hashtags?
2013                 if (!count($tags)) {
2014                         return false;
2015                 }
2016
2017                 // This sorting is important when there are hashtags that are part of other hashtags
2018                 // Otherwise there could be problems with hashtags like #test and #test2
2019                 rsort($tags);
2020
2021                 $URLSearchString = "^\[\]";
2022
2023                 // All hashtags should point to the home server if "local_tags" is activated
2024                 if (Config::get('system', 'local_tags')) {
2025                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2026                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2027
2028                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2029                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2030                 }
2031
2032                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2033                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2034                         function ($match) {
2035                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2036                         }, $item["body"]);
2037
2038                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2039                         function ($match) {
2040                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2041                         }, $item["body"]);
2042
2043                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2044                         function ($match) {
2045                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2046                         }, $item["body"]);
2047
2048                 // Repair recursive urls
2049                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2050                                 "&num;$2", $item["body"]);
2051
2052                 foreach ($tags as $tag) {
2053                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
2054                                 continue;
2055                         }
2056
2057                         $basetag = str_replace('_',' ',substr($tag,1));
2058
2059                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
2060
2061                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2062
2063                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2064                                 if (strlen($item["tag"])) {
2065                                         $item["tag"] = ','.$item["tag"];
2066                                 }
2067                                 $item["tag"] = $newtag.$item["tag"];
2068                         }
2069                 }
2070
2071                 // Convert back the masked hashtags
2072                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2073         }
2074
2075         public static function getGuidById($id)
2076         {
2077                 $item = self::selectFirst(['guid'], ['id' => $id]);
2078                 if (DBM::is_result($item)) {
2079                         return $item['guid'];
2080                 } else {
2081                         return '';
2082                 }
2083         }
2084
2085         public static function getIdAndNickByGuid($guid, $uid = 0)
2086         {
2087                 $nick = "";
2088                 $id = 0;
2089
2090                 if ($uid == 0) {
2091                         $uid == local_user();
2092                 }
2093
2094                 // Does the given user have this item?
2095                 if ($uid) {
2096                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2097                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2098                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2099                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
2100                         if (DBM::is_result($item)) {
2101                                 $id = $item["id"];
2102                                 $nick = $item["nickname"];
2103                         }
2104                 }
2105
2106                 // Or is it anywhere on the server?
2107                 if ($nick == "") {
2108                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2109                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2110                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2111                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
2112                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
2113                                         AND NOT `item`.`private` AND `item`.`wall`
2114                                         AND `item`.`guid` = ?", $guid);
2115                         if (DBM::is_result($item)) {
2116                                 $id = $item["id"];
2117                                 $nick = $item["nickname"];
2118                         }
2119                 }
2120                 return ["nick" => $nick, "id" => $id];
2121         }
2122
2123         /**
2124          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2125          * @param int $uid
2126          * @param int $item_id
2127          * @return bool true if item was deleted, else false
2128          */
2129         private static function tagDeliver($uid, $item_id)
2130         {
2131                 $mention = false;
2132
2133                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
2134                 if (!DBM::is_result($user)) {
2135                         return;
2136                 }
2137
2138                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
2139                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
2140
2141                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2142                 if (!DBM::is_result($item)) {
2143                         return;
2144                 }
2145
2146                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
2147
2148                 /*
2149                  * Diaspora uses their own hardwired link URL in @-tags
2150                  * instead of the one we supply with webfinger
2151                  */
2152                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
2153
2154                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2155                 if ($cnt) {
2156                         foreach ($matches as $mtch) {
2157                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
2158                                         $mention = true;
2159                                         logger('mention found: ' . $mtch[2]);
2160                                 }
2161                         }
2162                 }
2163
2164                 if (!$mention) {
2165                         if (($community_page || $prvgroup) &&
2166                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2167                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2168                                 // delete it!
2169                                 logger("no-mention top-level post to community or private group. delete.");
2170                                 dba::delete('item', ['id' => $item_id]);
2171                                 return true;
2172                         }
2173                         return;
2174                 }
2175
2176                 $arr = ['item' => $item, 'user' => $user];
2177
2178                 Addon::callHooks('tagged', $arr);
2179
2180                 if (!$community_page && !$prvgroup) {
2181                         return;
2182                 }
2183
2184                 /*
2185                  * tgroup delivery - setup a second delivery chain
2186                  * prevent delivery looping - only proceed
2187                  * if the message originated elsewhere and is a top-level post
2188                  */
2189                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2190                         return;
2191                 }
2192
2193                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2194                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2195                 if (!DBM::is_result($self)) {
2196                         return;
2197                 }
2198
2199                 $owner_id = Contact::getIdForURL($self['url']);
2200
2201                 // also reset all the privacy bits to the forum default permissions
2202
2203                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2204
2205                 $forum_mode = ($prvgroup ? 2 : 1);
2206
2207                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2208                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
2209                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
2210                 dba::update('item', $fields, ['id' => $item_id]);
2211
2212                 self::updateThread($item_id);
2213
2214                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2215         }
2216
2217         public static function isRemoteSelf($contact, &$datarray)
2218         {
2219                 $a = get_app();
2220
2221                 if (!$contact['remote_self']) {
2222                         return false;
2223                 }
2224
2225                 // Prevent the forwarding of posts that are forwarded
2226                 if ($datarray["extid"] == NETWORK_DFRN) {
2227                         logger('Already forwarded', LOGGER_DEBUG);
2228                         return false;
2229                 }
2230
2231                 // Prevent to forward already forwarded posts
2232                 if ($datarray["app"] == $a->get_hostname()) {
2233                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2234                         return false;
2235                 }
2236
2237                 // Only forward posts
2238                 if ($datarray["verb"] != ACTIVITY_POST) {
2239                         logger('No post', LOGGER_DEBUG);
2240                         return false;
2241                 }
2242
2243                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2244                         logger('Not public', LOGGER_DEBUG);
2245                         return false;
2246                 }
2247
2248                 $datarray2 = $datarray;
2249                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2250                 if ($contact['remote_self'] == 2) {
2251                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2252                                         ['uid' => $contact['uid'], 'self' => true]);
2253                         if (DBM::is_result($self)) {
2254                                 $datarray['contact-id'] = $self["id"];
2255
2256                                 $datarray['owner-name'] = $self["name"];
2257                                 $datarray['owner-link'] = $self["url"];
2258                                 $datarray['owner-avatar'] = $self["thumb"];
2259
2260                                 $datarray['author-name']   = $datarray['owner-name'];
2261                                 $datarray['author-link']   = $datarray['owner-link'];
2262                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2263
2264                                 unset($datarray['created']);
2265                                 unset($datarray['edited']);
2266
2267                                 unset($datarray['network']);
2268                                 unset($datarray['owner-id']);
2269                                 unset($datarray['author-id']);
2270                         }
2271
2272                         if ($contact['network'] != NETWORK_FEED) {
2273                                 $datarray["guid"] = get_guid(32);
2274                                 unset($datarray["plink"]);
2275                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2276                                 $datarray["parent-uri"] = $datarray["uri"];
2277                                 $datarray["thr-parent"] = $datarray["uri"];
2278                                 $datarray["extid"] = NETWORK_DFRN;
2279                                 $urlpart = parse_url($datarray2['author-link']);
2280                                 $datarray["app"] = $urlpart["host"];
2281                         } else {
2282                                 $datarray['private'] = 0;
2283                         }
2284                 }
2285
2286                 if ($contact['network'] != NETWORK_FEED) {
2287                         // Store the original post
2288                         $result = self::insert($datarray2, false, false);
2289                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2290                 } else {
2291                         $datarray["app"] = "Feed";
2292                         $result = true;
2293                 }
2294
2295                 // Trigger automatic reactions for addons
2296                 $datarray['api_source'] = true;
2297
2298                 // We have to tell the hooks who we are - this really should be improved
2299                 $_SESSION["authenticated"] = true;
2300                 $_SESSION["uid"] = $contact['uid'];
2301
2302                 return $result;
2303         }
2304
2305         /**
2306          *
2307          * @param string $s
2308          * @param int    $uid
2309          * @param array  $item
2310          * @param int    $cid
2311          * @return string
2312          */
2313         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2314         {
2315                 if (Config::get('system', 'disable_embedded')) {
2316                         return $s;
2317                 }
2318
2319                 logger('check for photos', LOGGER_DEBUG);
2320                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2321
2322                 $orig_body = $s;
2323                 $new_body = '';
2324
2325                 $img_start = strpos($orig_body, '[img');
2326                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2327                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2328
2329                 while (($img_st_close !== false) && ($img_len !== false)) {
2330                         $img_st_close++; // make it point to AFTER the closing bracket
2331                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2332
2333                         logger('found photo ' . $image, LOGGER_DEBUG);
2334
2335                         if (stristr($image, $site . '/photo/')) {
2336                                 // Only embed locally hosted photos
2337                                 $replace = false;
2338                                 $i = basename($image);
2339                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2340                                 $x = strpos($i, '-');
2341
2342                                 if ($x) {
2343                                         $res = substr($i, $x + 1);
2344                                         $i = substr($i, 0, $x);
2345                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2346                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2347                                         if (DBM::is_result($photo)) {
2348                                                 /*
2349                                                  * Check to see if we should replace this photo link with an embedded image
2350                                                  * 1. No need to do so if the photo is public
2351                                                  * 2. If there's a contact-id provided, see if they're in the access list
2352                                                  *    for the photo. If so, embed it.
2353                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2354                                                  *    permissions, regardless of order but first check to see if they're an exact
2355                                                  *    match to save some processing overhead.
2356                                                  */
2357                                                 if (self::hasPermissions($photo)) {
2358                                                         if ($cid) {
2359                                                                 $recips = self::enumeratePermissions($photo);
2360                                                                 if (in_array($cid, $recips)) {
2361                                                                         $replace = true;
2362                                                                 }
2363                                                         } elseif ($item) {
2364                                                                 if (self::samePermissions($item, $photo)) {
2365                                                                         $replace = true;
2366                                                                 }
2367                                                         }
2368                                                 }
2369                                                 if ($replace) {
2370                                                         $data = $photo['data'];
2371                                                         $type = $photo['type'];
2372
2373                                                         // If a custom width and height were specified, apply before embedding
2374                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2375                                                                 logger('scaling photo', LOGGER_DEBUG);
2376
2377                                                                 $width = intval($match[1]);
2378                                                                 $height = intval($match[2]);
2379
2380                                                                 $Image = new Image($data, $type);
2381                                                                 if ($Image->isValid()) {
2382                                                                         $Image->scaleDown(max($width, $height));
2383                                                                         $data = $Image->asString();
2384                                                                         $type = $Image->getType();
2385                                                                 }
2386                                                         }
2387
2388                                                         logger('replacing photo', LOGGER_DEBUG);
2389                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2390                                                         logger('replaced: ' . $image, LOGGER_DATA);
2391                                                 }
2392                                         }
2393                                 }
2394                         }
2395
2396                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2397                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2398                         if ($orig_body === false) {
2399                                 $orig_body = '';
2400                         }
2401
2402                         $img_start = strpos($orig_body, '[img');
2403                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2404                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2405                 }
2406
2407                 $new_body = $new_body . $orig_body;
2408
2409                 return $new_body;
2410         }
2411
2412         private static function hasPermissions($obj)
2413         {
2414                 return (
2415                         (
2416                                 x($obj, 'allow_cid')
2417                         ) || (
2418                                 x($obj, 'allow_gid')
2419                         ) || (
2420                                 x($obj, 'deny_cid')
2421                         ) || (
2422                                 x($obj, 'deny_gid')
2423                         )
2424                 );
2425         }
2426
2427         private static function samePermissions($obj1, $obj2)
2428         {
2429                 // first part is easy. Check that these are exactly the same.
2430                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2431                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2432                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2433                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2434                         return true;
2435                 }
2436
2437                 // This is harder. Parse all the permissions and compare the resulting set.
2438                 $recipients1 = self::enumeratePermissions($obj1);
2439                 $recipients2 = self::enumeratePermissions($obj2);
2440                 sort($recipients1);
2441                 sort($recipients2);
2442
2443                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2444                 return ($recipients1 == $recipients2);
2445         }
2446
2447         // returns an array of contact-ids that are allowed to see this object
2448         private static function enumeratePermissions($obj)
2449         {
2450                 $allow_people = expand_acl($obj['allow_cid']);
2451                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2452                 $deny_people  = expand_acl($obj['deny_cid']);
2453                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2454                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2455                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2456                 $recipients   = array_diff($recipients, $deny);
2457                 return $recipients;
2458         }
2459
2460         public static function getFeedTags($item)
2461         {
2462                 $ret = [];
2463                 $matches = false;
2464                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2465                 if ($cnt) {
2466                         for ($x = 0; $x < $cnt; $x ++) {
2467                                 if ($matches[1][$x]) {
2468                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2469                                 }
2470                         }
2471                 }
2472                 $matches = false;
2473                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2474                 if ($cnt) {
2475                         for ($x = 0; $x < $cnt; $x ++) {
2476                                 if ($matches[1][$x]) {
2477                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2478                                 }
2479                         }
2480                 }
2481                 return $ret;
2482         }
2483
2484         public static function expire($uid, $days, $network = "", $force = false)
2485         {
2486                 if (!$uid || ($days < 1)) {
2487                         return;
2488                 }
2489
2490                 /*
2491                  * $expire_network_only = save your own wall posts
2492                  * and just expire conversations started by others
2493                  */
2494                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
2495                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
2496
2497                 if ($network != "") {
2498                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
2499
2500                         /*
2501                          * There is an index "uid_network_received" but not "uid_network_created"
2502                          * This avoids the creation of another index just for one purpose.
2503                          * And it doesn't really matter wether to look at "received" or "created"
2504                          */
2505                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2506                 } else {
2507                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2508                 }
2509
2510                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
2511                         WHERE `uid` = %d $range
2512                         AND `id` = `parent`
2513                         $sql_extra
2514                         AND `deleted` = 0",
2515                         intval($uid),
2516                         intval($days)
2517                 );
2518
2519                 if (!DBM::is_result($r)) {
2520                         return;
2521                 }
2522
2523                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
2524
2525                 // Forcing expiring of items - but not notes and marked items
2526                 if ($force) {
2527                         $expire_items = true;
2528                 }
2529
2530                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
2531                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
2532                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
2533
2534                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2535
2536                 foreach ($r as $item) {
2537
2538                         // don't expire filed items
2539
2540                         if (strpos($item['file'],'[') !== false) {
2541                                 continue;
2542                         }
2543
2544                         // Only expire posts, not photos and photo comments
2545
2546                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
2547                                 continue;
2548                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
2549                                 continue;
2550                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
2551                                 continue;
2552                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
2553                                 continue;
2554                         }
2555
2556                         self::deleteById($item['id'], PRIORITY_LOW);
2557                 }
2558         }
2559
2560         public static function firstPostDate($uid, $wall = false)
2561         {
2562                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2563                 $params = ['order' => ['created' => false]];
2564                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2565                 if (DBM::is_result($thread)) {
2566                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2567                 }
2568                 return false;
2569         }
2570
2571         /**
2572          * @brief add/remove activity to an item
2573          *
2574          * Toggle activities as like,dislike,attend of an item
2575          *
2576          * @param string $item_id
2577          * @param string $verb
2578          *              Activity verb. One of
2579          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2580          *                      attendno, unattendno, attendmaybe, unattendmaybe
2581          * @hook 'post_local_end'
2582          *              array $arr
2583          *                      'post_id' => ID of posted item
2584          */
2585         public static function performLike($item_id, $verb)
2586         {
2587                 if (!local_user() && !remote_user()) {
2588                         return false;
2589                 }
2590
2591                 switch ($verb) {
2592                         case 'like':
2593                         case 'unlike':
2594                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
2595                                 $activity = ACTIVITY_LIKE;
2596                                 break;
2597                         case 'dislike':
2598                         case 'undislike':
2599                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
2600                                 $activity = ACTIVITY_DISLIKE;
2601                                 break;
2602                         case 'attendyes':
2603                         case 'unattendyes':
2604                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
2605                                 $activity = ACTIVITY_ATTEND;
2606                                 break;
2607                         case 'attendno':
2608                         case 'unattendno':
2609                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
2610                                 $activity = ACTIVITY_ATTENDNO;
2611                                 break;
2612                         case 'attendmaybe':
2613                         case 'unattendmaybe':
2614                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
2615                                 $activity = ACTIVITY_ATTENDMAYBE;
2616                                 break;
2617                         default:
2618                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2619                                 return false;
2620                 }
2621
2622                 // Enable activity toggling instead of on/off
2623                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2624
2625                 logger('like: verb ' . $verb . ' item ' . $item_id);
2626
2627                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2628                 if (!DBM::is_result($item)) {
2629                         logger('like: unknown item ' . $item_id);
2630                         return false;
2631                 }
2632
2633                 $uid = $item['uid'];
2634                 if (($uid == 0) && local_user()) {
2635                         $uid = local_user();
2636                 }
2637
2638                 if (!can_write_wall($uid)) {
2639                         logger('like: unable to write on wall ' . $uid);
2640                         return false;
2641                 }
2642
2643                 // Retrieves the local post owner
2644                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2645                 if (!DBM::is_result($owner_self_contact)) {
2646                         logger('like: unknown owner ' . $uid);
2647                         return false;
2648                 }
2649
2650                 // Retrieve the current logged in user's public contact
2651                 $author_id = public_contact();
2652
2653                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
2654                 if (!DBM::is_result($author_contact)) {
2655                         logger('like: unknown author ' . $author_id);
2656                         return false;
2657                 }
2658
2659                 // Contact-id is the uid-dependant author contact
2660                 if (local_user() == $uid) {
2661                         $item_contact_id = $owner_self_contact['id'];
2662                         $item_contact = $owner_self_contact;
2663                 } else {
2664                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2665                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2666                         if (!DBM::is_result($item_contact)) {
2667                                 logger('like: unknown item contact ' . $item_contact_id);
2668                                 return false;
2669                         }
2670                 }
2671
2672                 // Look for an existing verb row
2673                 // event participation are essentially radio toggles. If you make a subsequent choice,
2674                 // we need to eradicate your first choice.
2675                 if ($event_verb_flag) {
2676                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
2677                 } else {
2678                         $verbs = $activity;
2679                 }
2680
2681                 $base_condition = ['verb' => $verbs, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2682                         'author-id' => $author_contact['id'], 'uid' => item['uid']];
2683
2684                 $condition = array_merge($base_condition, ['parent' => $item_id]);
2685                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2686
2687                 if (!DBM::is_result($like_item)) {
2688                         $condition = array_merge($base_condition, ['parent-uri' => $item_id]);
2689                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2690                 }
2691
2692                 if (!DBM::is_result($like_item)) {
2693                         $condition = array_merge($base_condition, ['thr-parent' => $item_id]);
2694                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2695                 }
2696
2697                 // If it exists, mark it as deleted
2698                 if (DBM::is_result($like_item)) {
2699                         // Already voted, undo it
2700                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2701                         /// @todo Consider using self::update - but before doing so, check the side effects
2702                         dba::update('item', $fields, ['id' => $like_item['id']]);
2703
2704                         // Clean up the Diaspora signatures for this like
2705                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
2706                         // if it had been enabled in the past
2707                         dba::delete('sign', ['iid' => $like_item['id']]);
2708
2709                         $like_item_id = $like_item['id'];
2710                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
2711
2712                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2713                                 return true;
2714                         }
2715                 }
2716
2717                 // Verb is "un-something", just trying to delete existing entries
2718                 if (strpos($verb, 'un') === 0) {
2719                         return true;
2720                 }
2721
2722                 // Else or if event verb different from existing row, create a new item row
2723                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2724                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2725                         $post_type = L10n::t('event');
2726                 }
2727                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2728                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2729                 $body = $item['body'];
2730
2731                 $obj = <<< EOT
2732
2733                 <object>
2734                         <type>$objtype</type>
2735                         <local>1</local>
2736                         <id>{$item['uri']}</id>
2737                         <link>$link</link>
2738                         <title></title>
2739                         <content>$body</content>
2740                 </object>
2741 EOT;
2742
2743                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2744                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2745                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2746
2747                 $new_item = [
2748                         'guid'          => get_guid(32),
2749                         'uri'           => self::newURI($item['uid']),
2750                         'uid'           => $item['uid'],
2751                         'contact-id'    => $item_contact_id,
2752                         'type'          => 'activity',
2753                         'wall'          => $item['wall'],
2754                         'origin'        => 1,
2755                         'gravity'       => GRAVITY_ACTIVITY,
2756                         'parent'        => $item['id'],
2757                         'parent-uri'    => $item['uri'],
2758                         'thr-parent'    => $item['uri'],
2759                         'owner-id'      => $item['owner-id'],
2760                         'owner-name'    => $item['owner-name'],
2761                         'owner-link'    => $item['owner-link'],
2762                         'owner-avatar'  => $item['owner-avatar'],
2763                         'author-id'     => $author_contact['id'],
2764                         'author-name'   => $author_contact['name'],
2765                         'author-link'   => $author_contact['url'],
2766                         'author-avatar' => $author_contact['thumb'],
2767                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2768                         'verb'          => $activity,
2769                         'object-type'   => $objtype,
2770                         'object'        => $obj,
2771                         'allow_cid'     => $item['allow_cid'],
2772                         'allow_gid'     => $item['allow_gid'],
2773                         'deny_cid'      => $item['deny_cid'],
2774                         'deny_gid'      => $item['deny_gid'],
2775                         'visible'       => 1,
2776                         'unseen'        => 1,
2777                 ];
2778
2779                 $new_item_id = self::insert($new_item);
2780
2781                 // If the parent item isn't visible then set it to visible
2782                 if (!$item['visible']) {
2783                         self::update(['visible' => true], ['id' => $item['id']]);
2784                 }
2785
2786                 // Save the author information for the like in case we need to relay to Diaspora
2787                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2788
2789                 $new_item['id'] = $new_item_id;
2790
2791                 Addon::callHooks('post_local_end', $new_item);
2792
2793                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2794
2795                 return true;
2796         }
2797
2798         private static function addThread($itemid, $onlyshadow = false)
2799         {
2800                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2801                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2802                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2803                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2804                 $item = self::selectFirst($fields, $condition);
2805
2806                 if (!DBM::is_result($item)) {
2807                         return;
2808                 }
2809
2810                 $item['iid'] = $itemid;
2811
2812                 if (!$onlyshadow) {
2813                         $result = dba::insert('thread', $item);
2814
2815                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2816                 }
2817         }
2818
2819         private static function updateThread($itemid, $setmention = false)
2820         {
2821                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
2822                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2823                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
2824                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2825
2826                 $item = self::selectFirst($fields, $condition);
2827                 if (!DBM::is_result($item)) {
2828                         return;
2829                 }
2830
2831                 if ($setmention) {
2832                         $item["mention"] = 1;
2833                 }
2834
2835                 $sql = "";
2836
2837                 $fields = [];
2838
2839                 foreach ($item as $field => $data) {
2840                         if (!in_array($field, ["guid"])) {
2841                                 $fields[$field] = $data;
2842                         }
2843                 }
2844
2845                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2846
2847                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2848         }
2849
2850         private static function deleteThread($itemid, $itemuri = "")
2851         {
2852                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2853                 if (!DBM::is_result($item)) {
2854                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2855                         return;
2856                 }
2857
2858                 // Using dba::delete at this time could delete the associated item entries
2859                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2860
2861                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2862
2863                 if ($itemuri != "") {
2864                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2865                         if (!self::exists($condition)) {
2866                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2867                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2868                         }
2869                 }
2870         }
2871 }