src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Content\Text;
  11 use Friendica\Core\Addon;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\PConfig;
  15 use Friendica\Core\System;
  16 use Friendica\Core\Worker;
  17 use Friendica\Database\DBM;
  18 use Friendica\Model\Contact;
  19 use Friendica\Model\Conversation;
  20 use Friendica\Model\Group;
  21 use Friendica\Model\Term;
  22 use Friendica\Object\Image;
  23 use Friendica\Protocol\Diaspora;
  24 use Friendica\Protocol\OStatus;
  25 use Friendica\Util\DateTimeFormat;
  26 use Friendica\Util\XML;
  27 use Friendica\Util\Lock;
  28 use dba;
  29 use Text_LanguageDetect;
  30
  31 require_once 'boot.php';
  32 require_once 'include/items.php';
  33 require_once 'include/text.php';
  34
  35 class Item extends BaseObject
  36 {
  37         // Field list that is used to display the items
  38         const DISPLAY_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network',
  39                         'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  40                         'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  41                         'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  42                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  43                         'author-id', 'author-link', 'author-name', 'author-avatar',
  44                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar',
  45                         'contact-id', 'contact-link', 'contact-name', 'contact-avatar',
  46                         'writable', 'self', 'cid', 'alias',
  47                         'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  48                         'event-summary', 'event-desc', 'event-location', 'event-type',
  49                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
  50
  51         // Field list that is used to deliver items via the protocols
  52         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  53                         'created', 'edited', 'verb', 'object-type', 'object', 'target',
  54                         'private', 'title', 'body', 'location', 'coord', 'app',
  55                         'attach', 'tag', 'bookmark', 'deleted', 'extid',
  56                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  57                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  58                         'signed_text', 'signature', 'signer'];
  59
  60         // Field list for "item-content" table that is mixed with the item table
  61         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  62                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  63                         'object-type', 'object', 'target-type', 'target', 'plink'];
  64
  65         // Field list for "item-content" table that is not present in the "item" table
  66         const CONTENT_FIELDLIST = ['language'];
  67
  68         // All fields in the item table
  69         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  70                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid',
  71                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  72                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  73                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  74                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  75                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  76                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  77                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  78                         'author-id', 'author-link', 'author-name', 'author-avatar',
  79                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  80
  81         /**
  82          * @brief Fetch a single item row
  83          *
  84          * @param mixed $stmt statement object
  85          * @return array current row
  86          */
  87         public static function fetch($stmt)
  88         {
  89                 $row = dba::fetch($stmt);
  90
  91                 // Fetch data from the item-content table whenever there is content there
  92                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
  93                         if (empty($row[$field]) && !empty($row['item-' . $field])) {
  94                                 $row[$field] = $row['item-' . $field];
  95                         }
  96                         unset($row['item-' . $field]);
  97                 }
  98
  99                 // We prefer the data from the user's contact over the public one
 100                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 101                         ($row['author-link'] == $row['contact-link'])) {
 102                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 103                                 $row['author-avatar'] = $row['contact-avatar'];
 104                         }
 105                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 106                                 $row['author-name'] = $row['contact-name'];
 107                         }
 108                 }
 109
 110                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 111                         ($row['owner-link'] == $row['contact-link'])) {
 112                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 113                                 $row['owner-avatar'] = $row['contact-avatar'];
 114                         }
 115                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 116                                 $row['owner-name'] = $row['contact-name'];
 117                         }
 118                 }
 119
 120                 // Build the tag string out of the term entries
 121                 if (isset($row['id']) && array_key_exists('tag', $row)) {
 122                         $row['tag'] = Term::tagTextFromItemId($row['id']);
 123                 }
 124
 125                 // Build the file string out of the term entries
 126                 if (isset($row['id']) && array_key_exists('file', $row)) {
 127                         $row['file'] = Term::fileTextFromItemId($row['id']);
 128                 }
 129
 130                 // We can always comment on posts from these networks
 131                 if (isset($row['writable']) && !empty($row['network']) &&
 132                         in_array($row['network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
 133                         $row['writable'] = true;
 134                 }
 135
 136                 return $row;
 137         }
 138
 139         /**
 140          * @brief Fills an array with data from an item query
 141          *
 142          * @param object $stmt statement object
 143          * @return array Data array
 144          */
 145         public static function inArray($stmt, $do_close = true) {
 146                 if (is_bool($stmt)) {
 147                         return $stmt;
 148                 }
 149
 150                 $data = [];
 151                 while ($row = self::fetch($stmt)) {
 152                         $data[] = $row;
 153                 }
 154                 if ($do_close) {
 155                         dba::close($stmt);
 156                 }
 157                 return $data;
 158         }
 159
 160         /**
 161          * @brief Check if item data exists
 162          *
 163          * @param array $condition array of fields for condition
 164          *
 165          * @return boolean Are there rows for that condition?
 166          */
 167         public static function exists($condition) {
 168                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 169
 170                 if (is_bool($stmt)) {
 171                         $retval = $stmt;
 172                 } else {
 173                         $retval = (dba::num_rows($stmt) > 0);
 174                 }
 175
 176                 dba::close($stmt);
 177
 178                 return $retval;
 179         }
 180
 181         /**
 182          * Retrieve a single record from the item table for a given user and returns it in an associative array
 183          *
 184          * @brief Retrieve a single record from a table
 185          * @param integer $uid User ID
 186          * @param array  $fields
 187          * @param array  $condition
 188          * @param array  $params
 189          * @return bool|array
 190          * @see dba::select
 191          */
 192         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 193         {
 194                 $params['uid'] = $uid;
 195
 196                 if (empty($selected)) {
 197                         $selected = Item::DISPLAY_FIELDLIST;
 198                 }
 199
 200                 return self::selectFirst($selected, $condition, $params);
 201         }
 202
 203         /**
 204          * @brief Select rows from the item table for a given user
 205          *
 206          * @param integer $uid User ID
 207          * @param array  $selected  Array of selected fields, empty for all
 208          * @param array  $condition Array of fields for condition
 209          * @param array  $params    Array of several parameters
 210          *
 211          * @return boolean|object
 212          */
 213         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 214         {
 215                 $params['uid'] = $uid;
 216
 217                 if (empty($selected)) {
 218                         $selected = Item::DISPLAY_FIELDLIST;
 219                 }
 220
 221                 return self::select($selected, $condition, $params);
 222         }
 223
 224         /**
 225          * Retrieve a single record from the item table and returns it in an associative array
 226          *
 227          * @brief Retrieve a single record from a table
 228          * @param array  $fields
 229          * @param array  $condition
 230          * @param array  $params
 231          * @return bool|array
 232          * @see dba::select
 233          */
 234         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 235         {
 236                 $params['limit'] = 1;
 237
 238                 $result = self::select($fields, $condition, $params);
 239
 240                 if (is_bool($result)) {
 241                         return $result;
 242                 } else {
 243                         $row = self::fetch($result);
 244                         dba::close($result);
 245                         return $row;
 246                 }
 247         }
 248
 249         /**
 250          * @brief Select rows from the item table
 251          *
 252          * @param array  $selected  Array of selected fields, empty for all
 253          * @param array  $condition Array of fields for condition
 254          * @param array  $params    Array of several parameters
 255          *
 256          * @return boolean|object
 257          */
 258         public static function select(array $selected = [], array $condition = [], $params = [])
 259         {
 260                 $uid = 0;
 261                 $usermode = false;
 262
 263                 if (isset($params['uid'])) {
 264                         $uid = $params['uid'];
 265                         $usermode = true;
 266                 }
 267
 268                 $fields = self::fieldlist($selected);
 269
 270                 $select_fields = self::constructSelectFields($fields, $selected);
 271
 272                 $condition_string = dba::buildCondition($condition);
 273
 274                 $condition_string = self::addTablesToFields($condition_string, $fields);
 275
 276                 if ($usermode) {
 277                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 278                 }
 279
 280                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 281
 282                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false);
 283
 284                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 285
 286                 return dba::p($sql, $condition);
 287         }
 288
 289         /**
 290          * @brief Select rows from the starting post in the item table
 291          *
 292          * @param integer $uid User ID
 293          * @param array  $fields    Array of selected fields, empty for all
 294          * @param array  $condition Array of fields for condition
 295          * @param array  $params    Array of several parameters
 296          *
 297          * @return boolean|object
 298          */
 299         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 300         {
 301                 $params['uid'] = $uid;
 302
 303                 if (empty($selected)) {
 304                         $selected = Item::DISPLAY_FIELDLIST;
 305                 }
 306
 307                 return self::selectThread($selected, $condition, $params);
 308         }
 309
 310         /**
 311          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 312          *
 313          * @brief Retrieve a single record from a table
 314          * @param integer $uid User ID
 315          * @param array  $selected
 316          * @param array  $condition
 317          * @param array  $params
 318          * @return bool|array
 319          * @see dba::select
 320          */
 321         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 322         {
 323                 $params['uid'] = $uid;
 324
 325                 if (empty($selected)) {
 326                         $selected = Item::DISPLAY_FIELDLIST;
 327                 }
 328
 329                 return self::selectFirstThread($selected, $condition, $params);
 330         }
 331
 332         /**
 333          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 334          *
 335          * @brief Retrieve a single record from a table
 336          * @param array  $fields
 337          * @param array  $condition
 338          * @param array  $params
 339          * @return bool|array
 340          * @see dba::select
 341          */
 342         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 343         {
 344                 $params['limit'] = 1;
 345                 $result = self::selectThread($fields, $condition, $params);
 346
 347                 if (is_bool($result)) {
 348                         return $result;
 349                 } else {
 350                         $row = self::fetch($result);
 351                         dba::close($result);
 352                         return $row;
 353                 }
 354         }
 355
 356         /**
 357          * @brief Select rows from the starting post in the item table
 358          *
 359          * @param array  $selected  Array of selected fields, empty for all
 360          * @param array  $condition Array of fields for condition
 361          * @param array  $params    Array of several parameters
 362          *
 363          * @return boolean|object
 364          */
 365         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 366         {
 367                 $uid = 0;
 368                 $usermode = false;
 369
 370                 if (isset($params['uid'])) {
 371                         $uid = $params['uid'];
 372                         $usermode = true;
 373                 }
 374
 375                 $fields = self::fieldlist($selected);
 376
 377                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 378                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 379                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 380                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 381
 382                 $select_fields = self::constructSelectFields($fields, $selected);
 383
 384                 $condition_string = dba::buildCondition($condition);
 385
 386                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 387                 $condition_string = self::addTablesToFields($condition_string, $fields);
 388
 389                 if ($usermode) {
 390                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 391                 }
 392
 393                 $param_string = dba::buildParameter($params);
 394                 $param_string = self::addTablesToFields($param_string, $threadfields);
 395                 $param_string = self::addTablesToFields($param_string, $fields);
 396
 397                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true);
 398
 399                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 400
 401                 return dba::p($sql, $condition);
 402         }
 403
 404         /**
 405          * @brief Returns a list of fields that are associated with the item table
 406          *
 407          * @return array field list
 408          */
 409         private static function fieldlist($selected)
 410         {
 411                 $fields = [];
 412
 413                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 414                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 415                         'created', 'edited', 'commented', 'received', 'changed', 'postopts',
 416                         'resource-id', 'event-id', 'tag', 'attach', 'inform',
 417                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 418                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 419                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 420                         'id' => 'item_id', 'network', 'icid'];
 421
 422                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 423
 424                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 425                         'thumb' => 'author-avatar', 'nick' => 'author-nick'];
 426
 427                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 428                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick'];
 429
 430                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 431                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 432                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 433
 434                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 435
 436                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 437
 438                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 439                         'start' => 'event-start','finish' => 'event-finish',
 440                         'summary' => 'event-summary','desc' => 'event-desc',
 441                         'location' => 'event-location', 'type' => 'event-type',
 442                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 443                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 444
 445                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 446
 447                 return $fields;
 448         }
 449
 450         /**
 451          * @brief Returns SQL condition for the "select" functions
 452          *
 453          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 454          *
 455          * @return string SQL condition
 456          */
 457         private static function condition($thread_mode)
 458         {
 459                 if ($thread_mode) {
 460                         $master_table = "`thread`";
 461                 } else {
 462                         $master_table = "`item`";
 463                 }
 464                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 465         }
 466
 467         /**
 468          * @brief Returns all needed "JOIN" commands for the "select" functions
 469          *
 470          * @param integer $uid User ID
 471          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 472          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 473          *
 474          * @return string The SQL joins for the "select" functions
 475          */
 476         private static function constructJoins($uid, $sql_commands, $thread_mode)
 477         {
 478                 if ($thread_mode) {
 479                         $master_table = "`thread`";
 480                         $master_table_key = "`thread`.`iid`";
 481                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 482                 } else {
 483                         $master_table = "`item`";
 484                         $master_table_key = "`item`.`id`";
 485                         $joins = '';
 486                 }
 487
 488                 $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 489                         AND NOT `contact`.`blocked`
 490                         AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 491                         OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 492                         STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 493                         STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 494                         LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 495                         CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 496
 497                 if (strpos($sql_commands, "`group_member`.") !== false) {
 498                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 499                 }
 500
 501                 if (strpos($sql_commands, "`user`.") !== false) {
 502                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 503                 }
 504
 505                 if (strpos($sql_commands, "`event`.") !== false) {
 506                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 507                 }
 508
 509                 if (strpos($sql_commands, "`sign`.") !== false) {
 510                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 511                 }
 512
 513                 if (strpos($sql_commands, "`item-content`.") !== false) {
 514                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
 515                 }
 516
 517                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 518                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 519                 }
 520
 521                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 522                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 523                 }
 524
 525                 return $joins;
 526         }
 527
 528         /**
 529          * @brief Add the field list for the "select" functions
 530          *
 531          * @param array $fields The field definition array
 532          * @param array $selected The array with the selected fields from the "select" functions
 533          *
 534          * @return string The field list
 535          */
 536         private static function constructSelectFields($fields, $selected)
 537         {
 538                 // To be able to fetch the tags we need the item id
 539                 if (in_array('tag', $selected) && !in_array('id', $selected)) {
 540                         $selected[] = 'id';
 541                 }
 542
 543                 // To be able to fetch the files we need the item id
 544                 if (in_array('file', $selected) && !in_array('id', $selected)) {
 545                         $selected[] = 'id';
 546                 }
 547
 548                 $selection = [];
 549                 foreach ($fields as $table => $table_fields) {
 550                         foreach ($table_fields as $field => $select) {
 551                                 if (empty($selected) || in_array($select, $selected)) {
 552                                         if (in_array($select, self::MIXED_CONTENT_FIELDLIST)) {
 553                                                 $selection[] = "`item`.`".$select."` AS `item-" . $select . "`";
 554                                         }
 555                                         if (is_int($field)) {
 556                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 557                                         } else {
 558                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 559                                         }
 560                                 }
 561                         }
 562                 }
 563                 return implode(", ", $selection);
 564         }
 565
 566         /**
 567          * @brief add table definition to fields in an SQL query
 568          *
 569          * @param string $query SQL query
 570          * @param array $fields The field definition array
 571          *
 572          * @return string the changed SQL query
 573          */
 574         private static function addTablesToFields($query, $fields)
 575         {
 576                 foreach ($fields as $table => $table_fields) {
 577                         foreach ($table_fields as $alias => $field) {
 578                                 if (is_int($alias)) {
 579                                         $replace_field = $field;
 580                                 } else {
 581                                         $replace_field = $alias;
 582                                 }
 583
 584                                 $search = "/([^\.])`" . $field . "`/i";
 585                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 586                                 $query = preg_replace($search, $replace, $query);
 587                         }
 588                 }
 589                 return $query;
 590         }
 591
 592         /**
 593          * @brief Update existing item entries
 594          *
 595          * @param array $fields The fields that are to be changed
 596          * @param array $condition The condition for finding the item entries
 597          *
 598          * In the future we may have to change permissions as well.
 599          * Then we had to add the user id as third parameter.
 600          *
 601          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 602          *
 603          * @return integer|boolean number of affected rows - or "false" if there was an error
 604          */
 605         public static function update(array $fields, array $condition)
 606         {
 607                 if (empty($condition) || empty($fields)) {
 608                         return false;
 609                 }
 610
 611                 // To ensure the data integrity we do it in an transaction
 612                 dba::transaction();
 613
 614                 // We cannot simply expand the condition to check for origin entries
 615                 // The condition needn't to be a simple array but could be a complex condition.
 616                 // And we have to execute this query before the update to ensure to fetch the same data.
 617                 $items = dba::select('item', ['id', 'origin', 'uri', 'plink', 'icid'], $condition);
 618
 619                 $content_fields = [];
 620                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 621                         if (isset($fields[$field])) {
 622                                 $content_fields[$field] = $fields[$field];
 623                                 unset($fields[$field]);
 624                         }
 625                 }
 626
 627                 if (array_key_exists('tag', $fields)) {
 628                         $tags = $fields['tag'];
 629                         unset($fields['tag']);
 630                 } else {
 631                         $tags = '';
 632                 }
 633
 634                 if (array_key_exists('file', $fields)) {
 635                         $files = $fields['file'];
 636                         unset($fields['file']);
 637                 } else {
 638                         $files = '';
 639                 }
 640
 641                 if (!empty($fields)) {
 642                         $success = dba::update('item', $fields, $condition);
 643
 644                         if (!$success) {
 645                                 dba::close($items);
 646                                 dba::rollback();
 647                                 return false;
 648                         }
 649                 }
 650
 651                 // When there is no content for the "old" item table, this will count the fetched items
 652                 $rows = dba::affected_rows();
 653
 654                 while ($item = dba::fetch($items)) {
 655                         if (!empty($item['plink'])) {
 656                                 $content_fields['plink'] =  $item['plink'];
 657                         }
 658                         self::updateContent($content_fields, ['uri' => $item['uri']]);
 659
 660                         if (empty($item['icid'])) {
 661                                 $item_content = dba::selectFirst('item-content', [], ['uri' => $item['uri']]);
 662                                 if (DBM::is_result($item_content)) {
 663                                         $item_fields = ['icid' => $item_content['id']];
 664                                         // Clear all fields in the item table that have a content in the item-content table
 665                                         foreach ($item_content as $field => $content) {
 666                                                 if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
 667                                                         $item_fields[$field] = '';
 668                                                 }
 669                                         }
 670                                         dba::update('item', $item_fields, ['id' => $item['id']]);
 671                                 }
 672                         }
 673
 674                         if (!empty($tags)) {
 675                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
 676                         }
 677
 678                         if (!empty($files)) {
 679                                 Term::insertFromFileFieldByItemId($item['id'], $files);
 680                         }
 681
 682                         self::updateThread($item['id']);
 683
 684                         // We only need to notfiy others when it is an original entry from us.
 685                         // Only call the notifier when the item has some content relevant change.
 686                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 687                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 688                         }
 689                 }
 690
 691                 dba::close($items);
 692                 dba::commit();
 693                 return $rows;
 694         }
 695
 696         /**
 697          * @brief Delete an item and notify others about it - if it was ours
 698          *
 699          * @param array $condition The condition for finding the item entries
 700          * @param integer $priority Priority for the notification
 701          */
 702         public static function delete($condition, $priority = PRIORITY_HIGH)
 703         {
 704                 $items = dba::select('item', ['id'], $condition);
 705                 while ($item = dba::fetch($items)) {
 706                         self::deleteById($item['id'], $priority);
 707                 }
 708                 dba::close($items);
 709         }
 710
 711         /**
 712          * @brief Delete an item for an user and notify others about it - if it was ours
 713          *
 714          * @param array $condition The condition for finding the item entries
 715          * @param integer $uid User who wants to delete this item
 716          */
 717         public static function deleteForUser($condition, $uid)
 718         {
 719                 if ($uid == 0) {
 720                         return;
 721                 }
 722
 723                 $items = dba::select('item', ['id', 'uid'], $condition);
 724                 while ($item = dba::fetch($items)) {
 725                         // "Deleting" global items just means hiding them
 726                         if ($item['uid'] == 0) {
 727                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 728                         } elseif ($item['uid'] == $uid) {
 729                                 self::deleteById($item['id'], PRIORITY_HIGH);
 730                         } else {
 731                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 732                         }
 733                 }
 734                 dba::close($items);
 735         }
 736
 737         /**
 738          * @brief Delete an item and notify others about it - if it was ours
 739          *
 740          * @param integer $item_id Item ID that should be delete
 741          * @param integer $priority Priority for the notification
 742          *
 743          * @return boolean success
 744          */
 745         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 746         {
 747                 // locate item to be deleted
 748                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 749                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 750                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 751                 $item = self::selectFirst($fields, ['id' => $item_id]);
 752                 if (!DBM::is_result($item)) {
 753                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 754                         return false;
 755                 }
 756
 757                 if ($item['deleted']) {
 758                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 759                         return false;
 760                 }
 761
 762                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
 763                 if (!DBM::is_result($parent)) {
 764                         $parent = ['origin' => false];
 765                 }
 766
 767                 // clean up categories and tags so they don't end up as orphans
 768
 769                 $matches = false;
 770                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 771                 if ($cnt) {
 772                         foreach ($matches as $mtch) {
 773                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 774                         }
 775                 }
 776
 777                 $matches = false;
 778
 779                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 780                 if ($cnt) {
 781                         foreach ($matches as $mtch) {
 782                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 783                         }
 784                 }
 785
 786                 /*
 787                  * If item is a link to a photo resource, nuke all the associated photos
 788                  * (visitors will not have photo resources)
 789                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 790                  * generate a resource-id and therefore aren't intimately linked to the item.
 791                  */
 792                 if (strlen($item['resource-id'])) {
 793                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 794                 }
 795
 796                 // If item is a link to an event, delete the event.
 797                 if (intval($item['event-id'])) {
 798                         Event::delete($item['event-id']);
 799                 }
 800
 801                 // If item has attachments, drop them
 802                 foreach (explode(", ", $item['attach']) as $attach) {
 803                         preg_match("|attach/(\d+)|", $attach, $matches);
 804                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 805                 }
 806
 807                 // Delete tags that had been attached to other items
 808                 self::deleteTagsFromItem($item);
 809
 810                 // Set the item to "deleted"
 811                 // This erasing of item content is superfluous for items with a matching item-content.
 812                 // But for the next time we will still have old content in the item table.
 813                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow(),
 814                         'body' => '', 'title' => '', 'content-warning' => '', 'rendered-hash' => '', 'rendered-html' => '',
 815                         'object' => '', 'target' => '', 'tag' => '', 'postopts' => '', 'attach' => '', 'file' => ''];
 816                 dba::update('item', $item_fields, ['id' => $item['id']]);
 817
 818                 Term::insertFromTagFieldByItemId($item['id'], '');
 819                 Term::insertFromFileFieldByItemId($item['id'], '');
 820                 self::deleteThread($item['id'], $item['parent-uri']);
 821
 822                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 823                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 824                 }
 825
 826                 // If it's the parent of a comment thread, kill all the kids
 827                 if ($item['id'] == $item['parent']) {
 828                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 829                 }
 830
 831                 // Is it our comment and/or our thread?
 832                 if ($item['origin'] || $parent['origin']) {
 833
 834                         // When we delete the original post we will delete all existing copies on the server as well
 835                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 836
 837                         // send the notification upstream/downstream
 838                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 839                 } elseif ($item['uid'] != 0) {
 840
 841                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 842                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 843                         if (DBM::is_result($global_item)) {
 844                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 845                         }
 846                 }
 847
 848                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 849
 850                 return true;
 851         }
 852
 853         private static function deleteTagsFromItem($item)
 854         {
 855                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 856                         return;
 857                 }
 858
 859                 $xo = XML::parseString($item["object"], false);
 860                 $xt = XML::parseString($item["target"], false);
 861
 862                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 863                         return;
 864                 }
 865
 866                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 867                 if (!DBM::is_result($i)) {
 868                         return;
 869                 }
 870
 871                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 872                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 873                 $author_copy = $item["origin"];
 874
 875                 if (($owner_remove && $author_copy) || !$owner_remove) {
 876                         return;
 877                 }
 878
 879                 $tags = explode(',', $i["tag"]);
 880                 $newtags = [];
 881                 if (count($tags)) {
 882                         foreach ($tags as $tag) {
 883                                 if (trim($tag) !== trim($xo->body)) {
 884                                        $newtags[] = trim($tag);
 885                                 }
 886                         }
 887                 }
 888                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 889         }
 890
 891         private static function guid($item, $notify)
 892         {
 893                 $guid = notags(trim($item['guid']));
 894
 895                 if (!empty($guid)) {
 896                         return $guid;
 897                 }
 898
 899                 if ($notify) {
 900                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 901                         // We add the hash of our own host because our host is the original creator of the post.
 902                         $prefix_host = get_app()->get_hostname();
 903                 } else {
 904                         $prefix_host = '';
 905
 906                         // We are only storing the post so we create a GUID from the original hostname.
 907                         if (!empty($item['author-link'])) {
 908                                 $parsed = parse_url($item['author-link']);
 909                                 if (!empty($parsed['host'])) {
 910                                         $prefix_host = $parsed['host'];
 911                                 }
 912                         }
 913
 914                         if (empty($prefix_host) && !empty($item['plink'])) {
 915                                 $parsed = parse_url($item['plink']);
 916                                 if (!empty($parsed['host'])) {
 917                                         $prefix_host = $parsed['host'];
 918                                 }
 919                         }
 920
 921                         if (empty($prefix_host) && !empty($item['uri'])) {
 922                                 $parsed = parse_url($item['uri']);
 923                                 if (!empty($parsed['host'])) {
 924                                         $prefix_host = $parsed['host'];
 925                                 }
 926                         }
 927
 928                         // Is it in the format data@host.tld? - Used for mail contacts
 929                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 930                                 $mailparts = explode('@', $item['author-link']);
 931                                 $prefix_host = array_pop($mailparts);
 932                         }
 933                 }
 934
 935                 if (!empty($item['plink'])) {
 936                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 937                 } elseif (!empty($item['uri'])) {
 938                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 939                 } else {
 940                         $guid = get_guid(32, hash('crc32', $prefix_host));
 941                 }
 942
 943                 return $guid;
 944         }
 945
 946         private static function contactId($item)
 947         {
 948                 $contact_id = (int)$item["contact-id"];
 949
 950                 if (!empty($contact_id)) {
 951                         return $contact_id;
 952                 }
 953                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 954                 /*
 955                  * First we are looking for a suitable contact that matches with the author of the post
 956                  * This is done only for comments
 957                  */
 958                 if ($item['parent-uri'] != $item['uri']) {
 959                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 960                 }
 961
 962                 // If not present then maybe the owner was found
 963                 if ($contact_id == 0) {
 964                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 965                 }
 966
 967                 // Still missing? Then use the "self" contact of the current user
 968                 if ($contact_id == 0) {
 969                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 970                         if (DBM::is_result($self)) {
 971                                 $contact_id = $self["id"];
 972                         }
 973                 }
 974                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 975
 976                 return $contact_id;
 977         }
 978
 979         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 980         {
 981                 $a = get_app();
 982
 983                 // If it is a posting where users should get notifications, then define it as wall posting
 984                 if ($notify) {
 985                         $item['wall'] = 1;
 986                         $item['type'] = 'wall';
 987                         $item['origin'] = 1;
 988                         $item['network'] = NETWORK_DFRN;
 989                         $item['protocol'] = PROTOCOL_DFRN;
 990
 991                         if (is_int($notify)) {
 992                                 $priority = $notify;
 993                         } else {
 994                                 $priority = PRIORITY_HIGH;
 995                         }
 996                 } else {
 997                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 998                 }
 999
1000                 $item['guid'] = self::guid($item, $notify);
1001                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
1002
1003                 // Store conversation data
1004                 $item = Conversation::insert($item);
1005
1006                 /*
1007                  * If a Diaspora signature structure was passed in, pull it out of the
1008                  * item array and set it aside for later storage.
1009                  */
1010
1011                 $dsprsig = null;
1012                 if (x($item, 'dsprsig')) {
1013                         $encoded_signature = $item['dsprsig'];
1014                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1015                         unset($item['dsprsig']);
1016                 }
1017
1018                 if (!empty($item['diaspora_signed_text'])) {
1019                         $diaspora_signed_text = $item['diaspora_signed_text'];
1020                         unset($item['diaspora_signed_text']);
1021                 } else {
1022                         $diaspora_signed_text = '';
1023                 }
1024
1025                 // Converting the plink
1026                 /// @TODO Check if this is really still needed
1027                 if ($item['network'] == NETWORK_OSTATUS) {
1028                         if (isset($item['plink'])) {
1029                                 $item['plink'] = OStatus::convertHref($item['plink']);
1030                         } elseif (isset($item['uri'])) {
1031                                 $item['plink'] = OStatus::convertHref($item['uri']);
1032                         }
1033                 }
1034
1035                 if (!empty($item['thr-parent'])) {
1036                         $item['parent-uri'] = $item['thr-parent'];
1037                 }
1038
1039                 $item['type'] = defaults($item, 'type', 'remote');
1040
1041                 if (isset($item['gravity'])) {
1042                         $item['gravity'] = intval($item['gravity']);
1043                 } elseif ($item['parent-uri'] === $item['uri']) {
1044                         $item['gravity'] = GRAVITY_PARENT;
1045                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1046                         $item['gravity'] = GRAVITY_COMMENT;
1047                 } elseif ($item['type'] == 'activity') {
1048                         $item['gravity'] = GRAVITY_ACTIVITY;
1049                 } else {
1050                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1051                         logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
1052                 }
1053
1054                 $uid = intval($item['uid']);
1055
1056                 // check for create date and expire time
1057                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1058
1059                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
1060                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1061                         $expire_interval = $user['expire'];
1062                 }
1063
1064                 if (($expire_interval > 0) && !empty($item['created'])) {
1065                         $expire_date = time() - ($expire_interval * 86400);
1066                         $created_date = strtotime($item['created']);
1067                         if ($created_date < $expire_date) {
1068                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
1069                                 return 0;
1070                         }
1071                 }
1072
1073                 /*
1074                  * Do we already have this item?
1075                  * We have to check several networks since Friendica posts could be repeated
1076                  * via OStatus (maybe Diasporsa as well)
1077                  */
1078                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
1079                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1080                                 trim($item['uri']), $item['uid'],
1081                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
1082                         $existing = self::selectFirst(['id', 'network'], $condition);
1083                         if (DBM::is_result($existing)) {
1084                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1085                                 if ($uid != 0) {
1086                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
1087                                 }
1088
1089                                 return $existing["id"];
1090                         }
1091                 }
1092
1093                 self::addLanguageToItemArray($item);
1094
1095                 $item['wall']          = intval(defaults($item, 'wall', 0));
1096                 $item['extid']         = trim(defaults($item, 'extid', ''));
1097                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1098                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1099                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1100                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1101                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1102                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1103                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1104                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1105                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1106                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1107                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1108                 $item['title']         = trim(defaults($item, 'title', ''));
1109                 $item['location']      = trim(defaults($item, 'location', ''));
1110                 $item['coord']         = trim(defaults($item, 'coord', ''));
1111                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1112                 $item['deleted']       = 0;
1113                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1114                 $item['verb']          = trim(defaults($item, 'verb', ''));
1115                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1116                 $item['object']        = trim(defaults($item, 'object', ''));
1117                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1118                 $item['target']        = trim(defaults($item, 'target', ''));
1119                 $item['plink']         = trim(defaults($item, 'plink', ''));
1120                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1121                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1122                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1123                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1124                 $item['private']       = intval(defaults($item, 'private', 0));
1125                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1126                 $item['body']          = trim(defaults($item, 'body', ''));
1127                 $item['tag']           = trim(defaults($item, 'tag', ''));
1128                 $item['attach']        = trim(defaults($item, 'attach', ''));
1129                 $item['app']           = trim(defaults($item, 'app', ''));
1130                 $item['origin']        = intval(defaults($item, 'origin', 0));
1131                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1132                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1133                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1134                 $item['inform']        = trim(defaults($item, 'inform', ''));
1135                 $item['file']          = trim(defaults($item, 'file', ''));
1136
1137                 // When there is no content then we don't post it
1138                 if ($item['body'].$item['title'] == '') {
1139                         logger('No body, no title.');
1140                         return 0;
1141                 }
1142
1143                 // Items cannot be stored before they happen ...
1144                 if ($item['created'] > DateTimeFormat::utcNow()) {
1145                         $item['created'] = DateTimeFormat::utcNow();
1146                 }
1147
1148                 // We haven't invented time travel by now.
1149                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1150                         $item['edited'] = DateTimeFormat::utcNow();
1151                 }
1152
1153                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1154                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1155                 }
1156
1157                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1158
1159                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1160                 $item["contact-id"] = self::contactId($item);
1161
1162                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1163                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1164
1165                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1166
1167                 if (Contact::isBlocked($item["author-id"])) {
1168                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1169                         return 0;
1170                 }
1171
1172                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1173                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1174
1175                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1176
1177                 if (Contact::isBlocked($item["owner-id"])) {
1178                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1179                         return 0;
1180                 }
1181
1182                 // These fields aren't stored anymore in the item table, they are fetched upon request
1183                 unset($item['author-link']);
1184                 unset($item['author-name']);
1185                 unset($item['author-avatar']);
1186
1187                 unset($item['owner-link']);
1188                 unset($item['owner-name']);
1189                 unset($item['owner-avatar']);
1190
1191                 if ($item['network'] == NETWORK_PHANTOM) {
1192                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1193
1194                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1195                         if (!empty($contact['network'])) {
1196                                 $item['network'] = $contact["network"];
1197                         } else {
1198                                 $item['network'] = NETWORK_DFRN;
1199                         }
1200                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1201                 }
1202
1203                 // Checking if there is already an item with the same guid
1204                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1205                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1206                 if (self::exists($condition)) {
1207                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1208                         return 0;
1209                 }
1210
1211                 // Check for hashtags in the body and repair or add hashtag links
1212                 self::setHashtags($item);
1213
1214                 $item['thr-parent'] = $item['parent-uri'];
1215
1216                 $notify_type = '';
1217                 $allow_cid = '';
1218                 $allow_gid = '';
1219                 $deny_cid  = '';
1220                 $deny_gid  = '';
1221
1222                 if ($item['parent-uri'] === $item['uri']) {
1223                         $parent_id = 0;
1224                         $parent_deleted = 0;
1225                         $allow_cid = $item['allow_cid'];
1226                         $allow_gid = $item['allow_gid'];
1227                         $deny_cid  = $item['deny_cid'];
1228                         $deny_gid  = $item['deny_gid'];
1229                         $notify_type = 'wall-new';
1230                 } else {
1231                         // find the parent and snarf the item id and ACLs
1232                         // and anything else we need to inherit
1233
1234                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1235                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1236                                 'wall', 'private', 'forum_mode', 'origin'];
1237                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1238                         $params = ['order' => ['id' => false]];
1239                         $parent = self::selectFirst($fields, $condition, $params);
1240
1241                         if (DBM::is_result($parent)) {
1242                                 // is the new message multi-level threaded?
1243                                 // even though we don't support it now, preserve the info
1244                                 // and re-attach to the conversation parent.
1245
1246                                 if ($parent['uri'] != $parent['parent-uri']) {
1247                                         $item['parent-uri'] = $parent['parent-uri'];
1248
1249                                         $condition = ['uri' => $item['parent-uri'],
1250                                                 'parent-uri' => $item['parent-uri'],
1251                                                 'uid' => $item['uid']];
1252                                         $params = ['order' => ['id' => false]];
1253                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1254
1255                                         if (DBM::is_result($toplevel_parent)) {
1256                                                 $parent = $toplevel_parent;
1257                                         }
1258                                 }
1259
1260                                 $parent_id      = $parent['id'];
1261                                 $parent_deleted = $parent['deleted'];
1262                                 $allow_cid      = $parent['allow_cid'];
1263                                 $allow_gid      = $parent['allow_gid'];
1264                                 $deny_cid       = $parent['deny_cid'];
1265                                 $deny_gid       = $parent['deny_gid'];
1266                                 $item['wall']    = $parent['wall'];
1267                                 $notify_type    = 'comment-new';
1268
1269                                 /*
1270                                  * If the parent is private, force privacy for the entire conversation
1271                                  * This differs from the above settings as it subtly allows comments from
1272                                  * email correspondents to be private even if the overall thread is not.
1273                                  */
1274                                 if ($parent['private']) {
1275                                         $item['private'] = $parent['private'];
1276                                 }
1277
1278                                 /*
1279                                  * Edge case. We host a public forum that was originally posted to privately.
1280                                  * The original author commented, but as this is a comment, the permissions
1281                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1282                                  */
1283                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1284                                         $item['private'] = 0;
1285                                 }
1286
1287                                 // If its a post from myself then tag the thread as "mention"
1288                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1289                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1290                                 if (DBM::is_result($user)) {
1291                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1292                                         $self_id = Contact::getIdForURL($self, 0, true);
1293                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1294                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1295                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1296                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1297                                         }
1298                                 }
1299                         } else {
1300                                 /*
1301                                  * Allow one to see reply tweets from status.net even when
1302                                  * we don't have or can't see the original post.
1303                                  */
1304                                 if ($force_parent) {
1305                                         logger('$force_parent=true, reply converted to top-level post.');
1306                                         $parent_id = 0;
1307                                         $item['parent-uri'] = $item['uri'];
1308                                         $item['gravity'] = GRAVITY_PARENT;
1309                                 } else {
1310                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1311                                         return 0;
1312                                 }
1313
1314                                 $parent_deleted = 0;
1315                         }
1316                 }
1317
1318                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1319                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1320                 if (self::exists($condition)) {
1321                         logger('duplicated item with the same uri found. '.print_r($item,true));
1322                         return 0;
1323                 }
1324
1325                 // On Friendica and Diaspora the GUID is unique
1326                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1327                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1328                         if (self::exists($condition)) {
1329                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1330                                 return 0;
1331                         }
1332                 } else {
1333                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1334                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1335                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1336                         if (self::exists($condition)) {
1337                                 logger('duplicated item with the same body found. '.print_r($item,true));
1338                                 return 0;
1339                         }
1340                 }
1341
1342                 // Is this item available in the global items (with uid=0)?
1343                 if ($item["uid"] == 0) {
1344                         $item["global"] = true;
1345
1346                         // Set the global flag on all items if this was a global item entry
1347                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1348                 } else {
1349                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1350                 }
1351
1352                 // ACL settings
1353                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1354                         $private = 1;
1355                 } else {
1356                         $private = $item['private'];
1357                 }
1358
1359                 $item["allow_cid"] = $allow_cid;
1360                 $item["allow_gid"] = $allow_gid;
1361                 $item["deny_cid"] = $deny_cid;
1362                 $item["deny_gid"] = $deny_gid;
1363                 $item["private"] = $private;
1364                 $item["deleted"] = $parent_deleted;
1365
1366                 // Fill the cache field
1367                 put_item_in_cache($item);
1368
1369                 if ($notify) {
1370                         Addon::callHooks('post_local', $item);
1371                 } else {
1372                         Addon::callHooks('post_remote', $item);
1373                 }
1374
1375                 // This array field is used to trigger some automatic reactions
1376                 // It is mainly used in the "post_local" hook.
1377                 unset($item['api_source']);
1378
1379                 if (x($item, 'cancel')) {
1380                         logger('post cancelled by addon.');
1381                         return 0;
1382                 }
1383
1384                 /*
1385                  * Check for already added items.
1386                  * There is a timing issue here that sometimes creates double postings.
1387                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1388                  */
1389                 if ($item["uid"] == 0) {
1390                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1391                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1392                                 return 0;
1393                         }
1394                 }
1395
1396                 logger('' . print_r($item,true), LOGGER_DATA);
1397
1398                 if (array_key_exists('tag', $item)) {
1399                         $tags = $item['tag'];
1400                         unset($item['tag']);
1401                 } else {
1402                         $tags = '';
1403                 }
1404
1405                 if (array_key_exists('file', $item)) {
1406                         $files = $item['file'];
1407                         unset($item['file']);
1408                 } else {
1409                         $files = '';
1410                 }
1411
1412                 // We are doing this outside of the transaction to avoid timing problems
1413                 self::insertContent($item);
1414
1415                 dba::transaction();
1416                 $ret = dba::insert('item', $item);
1417
1418                 // When the item was successfully stored we fetch the ID of the item.
1419                 if (DBM::is_result($ret)) {
1420                         $current_post = dba::lastInsertId();
1421                 } else {
1422                         // This can happen - for example - if there are locking timeouts.
1423                         dba::rollback();
1424
1425                         // Store the data into a spool file so that we can try again later.
1426
1427                         // At first we restore the Diaspora signature that we removed above.
1428                         if (isset($encoded_signature)) {
1429                                 $item['dsprsig'] = $encoded_signature;
1430                         }
1431
1432                         // Now we store the data in the spool directory
1433                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1434                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1435
1436                         $spoolpath = get_spoolpath();
1437                         if ($spoolpath != "") {
1438                                 $spool = $spoolpath.'/'.$file;
1439                                 file_put_contents($spool, json_encode($item));
1440                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1441                         }
1442                         return 0;
1443                 }
1444
1445                 if ($current_post == 0) {
1446                         // This is one of these error messages that never should occur.
1447                         logger("couldn't find created item - we better quit now.");
1448                         dba::rollback();
1449                         return 0;
1450                 }
1451
1452                 // How much entries have we created?
1453                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1454                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1455
1456                 if ($entries > 1) {
1457                         // There are duplicates. We delete our just created entry.
1458                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1459
1460                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1461                         dba::delete('item', ['id' => $current_post]);
1462                         dba::commit();
1463                         return 0;
1464                 } elseif ($entries == 0) {
1465                         // This really should never happen since we quit earlier if there were problems.
1466                         logger("Something is terribly wrong. We haven't found our created entry.");
1467                         dba::rollback();
1468                         return 0;
1469                 }
1470
1471                 logger('created item '.$current_post);
1472                 self::updateContact($item);
1473
1474                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1475                         $parent_id = $current_post;
1476                 }
1477
1478                 // Set parent id
1479                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1480
1481                 $item['id'] = $current_post;
1482                 $item['parent'] = $parent_id;
1483
1484                 // update the commented timestamp on the parent
1485                 // Only update "commented" if it is really a comment
1486                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1487                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1488                 } else {
1489                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1490                 }
1491
1492                 if ($dsprsig) {
1493                         /*
1494                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1495                          * We can check for this condition when we decode and encode the stuff again.
1496                          */
1497                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1498                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1499                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1500                         }
1501
1502                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1503                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1504                 }
1505
1506                 if (!empty($diaspora_signed_text)) {
1507                         // Formerly we stored the signed text, the signature and the author in different fields.
1508                         // We now store the raw data so that we are more flexible.
1509                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1510                 }
1511
1512                 $deleted = self::tagDeliver($item['uid'], $current_post);
1513
1514                 /*
1515                  * current post can be deleted if is for a community page and no mention are
1516                  * in it.
1517                  */
1518                 if (!$deleted && !$dontcache) {
1519                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1520                         if (DBM::is_result($posted_item)) {
1521                                 if ($notify) {
1522                                         Addon::callHooks('post_local_end', $posted_item);
1523                                 } else {
1524                                         Addon::callHooks('post_remote_end', $posted_item);
1525                                 }
1526                         } else {
1527                                 logger('new item not found in DB, id ' . $current_post);
1528                         }
1529                 }
1530
1531                 if ($item['parent-uri'] === $item['uri']) {
1532                         self::addThread($current_post);
1533                 } else {
1534                         self::updateThread($parent_id);
1535                 }
1536
1537                 dba::commit();
1538
1539                 /*
1540                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1541                  * This is not perfect - but a workable solution until we found the reason for the problem.
1542                  */
1543                 if (!empty($tags)) {
1544                         Term::insertFromTagFieldByItemId($current_post, $tags);
1545                 }
1546
1547                 if (!empty($files)) {
1548                         Term::insertFromFileFieldByItemId($current_post, $files);
1549                 }
1550
1551                 if ($item['parent-uri'] === $item['uri']) {
1552                         self::addShadow($current_post);
1553                 } else {
1554                         self::addShadowPost($current_post);
1555                 }
1556
1557                 check_user_notification($current_post);
1558
1559                 if ($notify) {
1560                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1561                 } elseif (!empty($parent) && $parent['origin']) {
1562                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1563                 }
1564
1565                 return $current_post;
1566         }
1567
1568         /**
1569          * @brief Insert a new item content entry
1570          *
1571          * @param array $item The item fields that are to be inserted
1572          */
1573         private static function insertContent(&$item)
1574         {
1575                 $fields = ['uri' => $item['uri'], 'plink' => $item['plink'],
1576                         'uri-plink-hash' => hash('sha1', $item['plink']).hash('sha1', $item['uri'])];
1577
1578                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1579                         if (isset($item[$field])) {
1580                                 $fields[$field] = $item[$field];
1581                                 unset($item[$field]);
1582                         }
1583                 }
1584
1585                 // To avoid timing problems, we are using locks.
1586                 $locked = Lock::set('item_insert_content');
1587                 if (!$locked) {
1588                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1589                 }
1590
1591                 // Do we already have this content?
1592                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $item['uri']]);
1593                 if (DBM::is_result($item_content)) {
1594                         $item['icid'] = $item_content['id'];
1595                         logger('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1596                 } elseif (dba::insert('item-content', $fields)) {
1597                         $item['icid'] = dba::lastInsertId();
1598                         logger('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1599                 } else {
1600                         // By setting the ICID value through the worker we should avoid timing problems.
1601                         // When the locking works, this shouldn't be needed. But better be prepared.
1602                         Worker::add(PRIORITY_HIGH, 'SetItemContentID', $item['uri']);
1603                         logger('Could not insert content for URI ' . $item['uri'] . ' - trying asynchronously');
1604                 }
1605                 if ($locked) {
1606                         Lock::remove('item_insert_content');
1607                 }
1608         }
1609
1610         /**
1611          * @brief Set the item content id for a given URI
1612          *
1613          * @param string $uri The item URI
1614          */
1615         public static function setICIDforURI($uri)
1616         {
1617                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $uri]);
1618                 if (DBM::is_result($item_content)) {
1619                         dba::update('item', ['icid' => $item_content['id']], ['icid' => 0, 'uri' => $uri]);
1620                         logger('Asynchronously set item content id for URI ' . $uri . ' (' . $item_content['id'] . ') - Affected: '. (int)dba::affected_rows());
1621                 } else {
1622                         logger('No item-content found for URI ' . $uri);
1623                 }
1624         }
1625
1626         /**
1627          * @brief Update existing item content entries
1628          *
1629          * @param array $item The item fields that are to be changed
1630          * @param array $condition The condition for finding the item content entries
1631          */
1632         private static function updateContent($item, $condition)
1633         {
1634                 // We have to select only the fields from the "item-content" table
1635                 $fields = [];
1636                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1637                         if (isset($item[$field])) {
1638                                 $fields[$field] = $item[$field];
1639                         }
1640                 }
1641
1642                 if (empty($fields)) {
1643                         return;
1644                 }
1645
1646                 if (!empty($item['plink'])) {
1647                         $fields['uri-plink-hash'] = hash('sha1', $item['plink']) . hash('sha1', $condition['uri']);
1648                 } else {
1649                         // Ensure that we don't delete the plink
1650                         unset($fields['plink']);
1651                 }
1652
1653                 logger('Update content for URI ' . $condition['uri']);
1654
1655                 dba::update('item-content', $fields, $condition, true);
1656         }
1657
1658         /**
1659          * @brief Distributes public items to the receivers
1660          *
1661          * @param integer $itemid      Item ID that should be added
1662          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1663          */
1664         public static function distribute($itemid, $signed_text = '')
1665         {
1666                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1667                 $parent = self::selectFirst(['owner-id'], $condition);
1668                 if (!DBM::is_result($parent)) {
1669                         return;
1670                 }
1671
1672                 // Only distribute public items from native networks
1673                 $condition = ['id' => $itemid, 'uid' => 0,
1674                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1675                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1676                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1677                 if (!DBM::is_result($item)) {
1678                         return;
1679                 }
1680
1681                 unset($item['id']);
1682                 unset($item['parent']);
1683                 unset($item['mention']);
1684                 unset($item['wall']);
1685                 unset($item['origin']);
1686                 unset($item['starred']);
1687
1688                 $users = [];
1689
1690                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1691                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1692                 $contacts = dba::select('contact', ['uid'], $condition);
1693                 while ($contact = dba::fetch($contacts)) {
1694                         $users[$contact['uid']] = $contact['uid'];
1695                 }
1696
1697                 $origin_uid = 0;
1698
1699                 if ($item['uri'] != $item['parent-uri']) {
1700                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1701                         while ($parent = dba::fetch($parents)) {
1702                                 $users[$parent['uid']] = $parent['uid'];
1703                                 if ($parent['origin'] && !$item['origin']) {
1704                                         $origin_uid = $parent['uid'];
1705                                 }
1706                         }
1707                 }
1708
1709                 foreach ($users as $uid) {
1710                         if ($origin_uid == $uid) {
1711                                 $item['diaspora_signed_text'] = $signed_text;
1712                         }
1713                         self::storeForUser($itemid, $item, $uid);
1714                 }
1715         }
1716
1717         /**
1718          * @brief Store public items for the receivers
1719          *
1720          * @param integer $itemid Item ID that should be added
1721          * @param array   $item   The item entry that will be stored
1722          * @param integer $uid    The user that will receive the item entry
1723          */
1724         private static function storeForUser($itemid, $item, $uid)
1725         {
1726                 $item['uid'] = $uid;
1727                 $item['origin'] = 0;
1728                 $item['wall'] = 0;
1729                 if ($item['uri'] == $item['parent-uri']) {
1730                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1731                 } else {
1732                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1733                 }
1734
1735                 if (empty($item['contact-id'])) {
1736                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1737                         if (!DBM::is_result($self)) {
1738                                 return;
1739                         }
1740                         $item['contact-id'] = $self['id'];
1741                 }
1742
1743                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1744                         $item['type'] = 'remote-comment';
1745                 } elseif ($item['type'] == 'wall') {
1746                         $item['type'] = 'remote';
1747                 }
1748
1749                 /// @todo Handling of "event-id"
1750
1751                 $notify = false;
1752                 if ($item['uri'] == $item['parent-uri']) {
1753                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1754                         if (DBM::is_result($contact)) {
1755                                 $notify = self::isRemoteSelf($contact, $item);
1756                         }
1757                 }
1758
1759                 $distributed = self::insert($item, false, $notify, true);
1760
1761                 if (!$distributed) {
1762                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1763                 } else {
1764                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1765                 }
1766         }
1767
1768         /**
1769          * @brief Add a shadow entry for a given item id that is a thread starter
1770          *
1771          * We store every public item entry additionally with the user id "0".
1772          * This is used for the community page and for the search.
1773          * It is planned that in the future we will store public item entries only once.
1774          *
1775          * @param integer $itemid Item ID that should be added
1776          */
1777         public static function addShadow($itemid)
1778         {
1779                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
1780                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1781                 $item = self::selectFirst($fields, $condition);
1782
1783                 if (!DBM::is_result($item)) {
1784                         return;
1785                 }
1786
1787                 // is it already a copy?
1788                 if (($itemid == 0) || ($item['uid'] == 0)) {
1789                         return;
1790                 }
1791
1792                 // Is it a visible public post?
1793                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1794                         return;
1795                 }
1796
1797                 // is it an entry from a connector? Only add an entry for natively connected networks
1798                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1799                         return;
1800                 }
1801
1802                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1803                         return;
1804                 }
1805
1806                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1807
1808                 if (DBM::is_result($item)) {
1809                         // Preparing public shadow (removing user specific data)
1810                         $item['uid'] = 0;
1811                         unset($item['id']);
1812                         unset($item['parent']);
1813                         unset($item['wall']);
1814                         unset($item['mention']);
1815                         unset($item['origin']);
1816                         unset($item['starred']);
1817                         if ($item['uri'] == $item['parent-uri']) {
1818                                 $item['contact-id'] = $item['owner-id'];
1819                         } else {
1820                                 $item['contact-id'] = $item['author-id'];
1821                         }
1822
1823                         if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1824                                 $item['type'] = 'remote-comment';
1825                         } elseif ($item['type'] == 'wall') {
1826                                 $item['type'] = 'remote';
1827                         }
1828
1829                         $public_shadow = self::insert($item, false, false, true);
1830
1831                         logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1832                 }
1833         }
1834
1835         /**
1836          * @brief Add a shadow entry for a given item id that is a comment
1837          *
1838          * This function does the same like the function above - but for comments
1839          *
1840          * @param integer $itemid Item ID that should be added
1841          */
1842         public static function addShadowPost($itemid)
1843         {
1844                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1845                 if (!DBM::is_result($item)) {
1846                         return;
1847                 }
1848
1849                 // Is it a toplevel post?
1850                 if ($item['id'] == $item['parent']) {
1851                         self::addShadow($itemid);
1852                         return;
1853                 }
1854
1855                 // Is this a shadow entry?
1856                 if ($item['uid'] == 0) {
1857                         return;
1858                 }
1859
1860                 // Is there a shadow parent?
1861                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
1862                         return;
1863                 }
1864
1865                 // Is there already a shadow entry?
1866                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1867                         return;
1868                 }
1869
1870                 // Save "origin" and "parent" state
1871                 $origin = $item['origin'];
1872                 $parent = $item['parent'];
1873
1874                 // Preparing public shadow (removing user specific data)
1875                 $item['uid'] = 0;
1876                 unset($item['id']);
1877                 unset($item['parent']);
1878                 unset($item['wall']);
1879                 unset($item['mention']);
1880                 unset($item['origin']);
1881                 unset($item['starred']);
1882                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1883
1884                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1885                         $item['type'] = 'remote-comment';
1886                 } elseif ($item['type'] == 'wall') {
1887                         $item['type'] = 'remote';
1888                 }
1889
1890                 $public_shadow = self::insert($item, false, false, true);
1891
1892                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1893
1894                 // If this was a comment to a Diaspora post we don't get our comment back.
1895                 // This means that we have to distribute the comment by ourselves.
1896                 if ($origin && self::exists(['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1897                         self::distribute($public_shadow);
1898                 }
1899         }
1900
1901          /**
1902          * Adds a language specification in a "language" element of given $arr.
1903          * Expects "body" element to exist in $arr.
1904          */
1905         private static function addLanguageToItemArray(&$item)
1906         {
1907                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1908
1909                 $ld = new Text_LanguageDetect();
1910                 $ld->setNameMode(2);
1911                 $languages = $ld->detect($naked_body, 3);
1912
1913                 if (is_array($languages)) {
1914                         $item['language'] = json_encode($languages);
1915                 }
1916         }
1917
1918         /**
1919          * @brief Creates an unique guid out of a given uri
1920          *
1921          * @param string $uri uri of an item entry
1922          * @param string $host hostname for the GUID prefix
1923          * @return string unique guid
1924          */
1925         public static function guidFromUri($uri, $host)
1926         {
1927                 // Our regular guid routine is using this kind of prefix as well
1928                 // We have to avoid that different routines could accidentally create the same value
1929                 $parsed = parse_url($uri);
1930
1931                 // We use a hash of the hostname as prefix for the guid
1932                 $guid_prefix = hash("crc32", $host);
1933
1934                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1935                 unset($parsed["scheme"]);
1936
1937                 // Glue it together to be able to make a hash from it
1938                 $host_id = implode("/", $parsed);
1939
1940                 // We could use any hash algorithm since it isn't a security issue
1941                 $host_hash = hash("ripemd128", $host_id);
1942
1943                 return $guid_prefix.$host_hash;
1944         }
1945
1946         /**
1947          * generate an unique URI
1948          *
1949          * @param integer $uid User id
1950          * @param string $guid An existing GUID (Otherwise it will be generated)
1951          *
1952          * @return string
1953          */
1954         public static function newURI($uid, $guid = "")
1955         {
1956                 if ($guid == "") {
1957                         $guid = get_guid(32);
1958                 }
1959
1960                 $hostname = self::getApp()->get_hostname();
1961
1962                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
1963
1964                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
1965
1966                 return $uri;
1967         }
1968
1969         /**
1970          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1971          *
1972          * This can be used to filter for inactive contacts.
1973          * Only do this for public postings to avoid privacy problems, since poco data is public.
1974          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1975          *
1976          * @param array $arr Contains the just posted item record
1977          */
1978         private static function updateContact($arr)
1979         {
1980                 // Unarchive the author
1981                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1982                 if (DBM::is_result($contact)) {
1983                         Contact::unmarkForArchival($contact);
1984                 }
1985
1986                 // Unarchive the contact if it's not our own contact
1987                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1988                 if (DBM::is_result($contact)) {
1989                         Contact::unmarkForArchival($contact);
1990                 }
1991
1992                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1993
1994                 // Is it a forum? Then we don't care about the rules from above
1995                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1996                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1997                                 $update = true;
1998                         }
1999                 }
2000
2001                 if ($update) {
2002                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2003                                 ['id' => $arr['contact-id']]);
2004                 }
2005                 // Now do the same for the system wide contacts with uid=0
2006                 if (!$arr['private']) {
2007                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2008                                 ['id' => $arr['owner-id']]);
2009
2010                         if ($arr['owner-id'] != $arr['author-id']) {
2011                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2012                                         ['id' => $arr['author-id']]);
2013                         }
2014                 }
2015         }
2016
2017         public static function setHashtags(&$item)
2018         {
2019
2020                 $tags = get_tags($item["body"]);
2021
2022                 // No hashtags?
2023                 if (!count($tags)) {
2024                         return false;
2025                 }
2026
2027                 // This sorting is important when there are hashtags that are part of other hashtags
2028                 // Otherwise there could be problems with hashtags like #test and #test2
2029                 rsort($tags);
2030
2031                 $URLSearchString = "^\[\]";
2032
2033                 // All hashtags should point to the home server if "local_tags" is activated
2034                 if (Config::get('system', 'local_tags')) {
2035                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2036                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2037
2038                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2039                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2040                 }
2041
2042                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2043                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2044                         function ($match) {
2045                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2046                         }, $item["body"]);
2047
2048                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2049                         function ($match) {
2050                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2051                         }, $item["body"]);
2052
2053                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2054                         function ($match) {
2055                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2056                         }, $item["body"]);
2057
2058                 // Repair recursive urls
2059                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2060                                 "&num;$2", $item["body"]);
2061
2062                 foreach ($tags as $tag) {
2063                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
2064                                 continue;
2065                         }
2066
2067                         $basetag = str_replace('_',' ',substr($tag,1));
2068
2069                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
2070
2071                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2072
2073                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2074                                 if (strlen($item["tag"])) {
2075                                         $item["tag"] = ','.$item["tag"];
2076                                 }
2077                                 $item["tag"] = $newtag.$item["tag"];
2078                         }
2079                 }
2080
2081                 // Convert back the masked hashtags
2082                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2083         }
2084
2085         public static function getGuidById($id)
2086         {
2087                 $item = self::selectFirst(['guid'], ['id' => $id]);
2088                 if (DBM::is_result($item)) {
2089                         return $item['guid'];
2090                 } else {
2091                         return '';
2092                 }
2093         }
2094
2095         public static function getIdAndNickByGuid($guid, $uid = 0)
2096         {
2097                 $nick = "";
2098                 $id = 0;
2099
2100                 if ($uid == 0) {
2101                         $uid == local_user();
2102                 }
2103
2104                 // Does the given user have this item?
2105                 if ($uid) {
2106                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2107                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2108                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2109                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
2110                         if (DBM::is_result($item)) {
2111                                 $id = $item["id"];
2112                                 $nick = $item["nickname"];
2113                         }
2114                 }
2115
2116                 // Or is it anywhere on the server?
2117                 if ($nick == "") {
2118                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2119                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2120                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2121                                         AND NOT `item`.`private` AND `item`.`wall`
2122                                         AND `item`.`guid` = ?", $guid);
2123                         if (DBM::is_result($item)) {
2124                                 $id = $item["id"];
2125                                 $nick = $item["nickname"];
2126                         }
2127                 }
2128                 return ["nick" => $nick, "id" => $id];
2129         }
2130
2131         /**
2132          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2133          * @param int $uid
2134          * @param int $item_id
2135          * @return bool true if item was deleted, else false
2136          */
2137         private static function tagDeliver($uid, $item_id)
2138         {
2139                 $mention = false;
2140
2141                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
2142                 if (!DBM::is_result($user)) {
2143                         return;
2144                 }
2145
2146                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
2147                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
2148
2149                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2150                 if (!DBM::is_result($item)) {
2151                         return;
2152                 }
2153
2154                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
2155
2156                 /*
2157                  * Diaspora uses their own hardwired link URL in @-tags
2158                  * instead of the one we supply with webfinger
2159                  */
2160                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
2161
2162                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2163                 if ($cnt) {
2164                         foreach ($matches as $mtch) {
2165                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
2166                                         $mention = true;
2167                                         logger('mention found: ' . $mtch[2]);
2168                                 }
2169                         }
2170                 }
2171
2172                 if (!$mention) {
2173                         if (($community_page || $prvgroup) &&
2174                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2175                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2176                                 // delete it!
2177                                 logger("no-mention top-level post to community or private group. delete.");
2178                                 dba::delete('item', ['id' => $item_id]);
2179                                 return true;
2180                         }
2181                         return;
2182                 }
2183
2184                 $arr = ['item' => $item, 'user' => $user];
2185
2186                 Addon::callHooks('tagged', $arr);
2187
2188                 if (!$community_page && !$prvgroup) {
2189                         return;
2190                 }
2191
2192                 /*
2193                  * tgroup delivery - setup a second delivery chain
2194                  * prevent delivery looping - only proceed
2195                  * if the message originated elsewhere and is a top-level post
2196                  */
2197                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2198                         return;
2199                 }
2200
2201                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2202                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2203                 if (!DBM::is_result($self)) {
2204                         return;
2205                 }
2206
2207                 $owner_id = Contact::getIdForURL($self['url']);
2208
2209                 // also reset all the privacy bits to the forum default permissions
2210
2211                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2212
2213                 $forum_mode = ($prvgroup ? 2 : 1);
2214
2215                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2216                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
2217                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
2218                 dba::update('item', $fields, ['id' => $item_id]);
2219
2220                 self::updateThread($item_id);
2221
2222                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2223         }
2224
2225         public static function isRemoteSelf($contact, &$datarray)
2226         {
2227                 $a = get_app();
2228
2229                 if (!$contact['remote_self']) {
2230                         return false;
2231                 }
2232
2233                 // Prevent the forwarding of posts that are forwarded
2234                 if ($datarray["extid"] == NETWORK_DFRN) {
2235                         logger('Already forwarded', LOGGER_DEBUG);
2236                         return false;
2237                 }
2238
2239                 // Prevent to forward already forwarded posts
2240                 if ($datarray["app"] == $a->get_hostname()) {
2241                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2242                         return false;
2243                 }
2244
2245                 // Only forward posts
2246                 if ($datarray["verb"] != ACTIVITY_POST) {
2247                         logger('No post', LOGGER_DEBUG);
2248                         return false;
2249                 }
2250
2251                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2252                         logger('Not public', LOGGER_DEBUG);
2253                         return false;
2254                 }
2255
2256                 $datarray2 = $datarray;
2257                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2258                 if ($contact['remote_self'] == 2) {
2259                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2260                                         ['uid' => $contact['uid'], 'self' => true]);
2261                         if (DBM::is_result($self)) {
2262                                 $datarray['contact-id'] = $self["id"];
2263
2264                                 $datarray['owner-name'] = $self["name"];
2265                                 $datarray['owner-link'] = $self["url"];
2266                                 $datarray['owner-avatar'] = $self["thumb"];
2267
2268                                 $datarray['author-name']   = $datarray['owner-name'];
2269                                 $datarray['author-link']   = $datarray['owner-link'];
2270                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2271
2272                                 unset($datarray['created']);
2273                                 unset($datarray['edited']);
2274
2275                                 unset($datarray['network']);
2276                                 unset($datarray['owner-id']);
2277                                 unset($datarray['author-id']);
2278                         }
2279
2280                         if ($contact['network'] != NETWORK_FEED) {
2281                                 $datarray["guid"] = get_guid(32);
2282                                 unset($datarray["plink"]);
2283                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2284                                 $datarray["parent-uri"] = $datarray["uri"];
2285                                 $datarray["thr-parent"] = $datarray["uri"];
2286                                 $datarray["extid"] = NETWORK_DFRN;
2287                                 $urlpart = parse_url($datarray2['author-link']);
2288                                 $datarray["app"] = $urlpart["host"];
2289                         } else {
2290                                 $datarray['private'] = 0;
2291                         }
2292                 }
2293
2294                 if ($contact['network'] != NETWORK_FEED) {
2295                         // Store the original post
2296                         $result = self::insert($datarray2, false, false);
2297                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2298                 } else {
2299                         $datarray["app"] = "Feed";
2300                         $result = true;
2301                 }
2302
2303                 // Trigger automatic reactions for addons
2304                 $datarray['api_source'] = true;
2305
2306                 // We have to tell the hooks who we are - this really should be improved
2307                 $_SESSION["authenticated"] = true;
2308                 $_SESSION["uid"] = $contact['uid'];
2309
2310                 return $result;
2311         }
2312
2313         /**
2314          *
2315          * @param string $s
2316          * @param int    $uid
2317          * @param array  $item
2318          * @param int    $cid
2319          * @return string
2320          */
2321         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2322         {
2323                 if (Config::get('system', 'disable_embedded')) {
2324                         return $s;
2325                 }
2326
2327                 logger('check for photos', LOGGER_DEBUG);
2328                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2329
2330                 $orig_body = $s;
2331                 $new_body = '';
2332
2333                 $img_start = strpos($orig_body, '[img');
2334                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2335                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2336
2337                 while (($img_st_close !== false) && ($img_len !== false)) {
2338                         $img_st_close++; // make it point to AFTER the closing bracket
2339                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2340
2341                         logger('found photo ' . $image, LOGGER_DEBUG);
2342
2343                         if (stristr($image, $site . '/photo/')) {
2344                                 // Only embed locally hosted photos
2345                                 $replace = false;
2346                                 $i = basename($image);
2347                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2348                                 $x = strpos($i, '-');
2349
2350                                 if ($x) {
2351                                         $res = substr($i, $x + 1);
2352                                         $i = substr($i, 0, $x);
2353                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2354                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2355                                         if (DBM::is_result($photo)) {
2356                                                 /*
2357                                                  * Check to see if we should replace this photo link with an embedded image
2358                                                  * 1. No need to do so if the photo is public
2359                                                  * 2. If there's a contact-id provided, see if they're in the access list
2360                                                  *    for the photo. If so, embed it.
2361                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2362                                                  *    permissions, regardless of order but first check to see if they're an exact
2363                                                  *    match to save some processing overhead.
2364                                                  */
2365                                                 if (self::hasPermissions($photo)) {
2366                                                         if ($cid) {
2367                                                                 $recips = self::enumeratePermissions($photo);
2368                                                                 if (in_array($cid, $recips)) {
2369                                                                         $replace = true;
2370                                                                 }
2371                                                         } elseif ($item) {
2372                                                                 if (self::samePermissions($item, $photo)) {
2373                                                                         $replace = true;
2374                                                                 }
2375                                                         }
2376                                                 }
2377                                                 if ($replace) {
2378                                                         $data = $photo['data'];
2379                                                         $type = $photo['type'];
2380
2381                                                         // If a custom width and height were specified, apply before embedding
2382                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2383                                                                 logger('scaling photo', LOGGER_DEBUG);
2384
2385                                                                 $width = intval($match[1]);
2386                                                                 $height = intval($match[2]);
2387
2388                                                                 $Image = new Image($data, $type);
2389                                                                 if ($Image->isValid()) {
2390                                                                         $Image->scaleDown(max($width, $height));
2391                                                                         $data = $Image->asString();
2392                                                                         $type = $Image->getType();
2393                                                                 }
2394                                                         }
2395
2396                                                         logger('replacing photo', LOGGER_DEBUG);
2397                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2398                                                         logger('replaced: ' . $image, LOGGER_DATA);
2399                                                 }
2400                                         }
2401                                 }
2402                         }
2403
2404                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2405                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2406                         if ($orig_body === false) {
2407                                 $orig_body = '';
2408                         }
2409
2410                         $img_start = strpos($orig_body, '[img');
2411                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2412                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2413                 }
2414
2415                 $new_body = $new_body . $orig_body;
2416
2417                 return $new_body;
2418         }
2419
2420         private static function hasPermissions($obj)
2421         {
2422                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2423                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2424         }
2425
2426         private static function samePermissions($obj1, $obj2)
2427         {
2428                 // first part is easy. Check that these are exactly the same.
2429                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2430                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2431                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2432                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2433                         return true;
2434                 }
2435
2436                 // This is harder. Parse all the permissions and compare the resulting set.
2437                 $recipients1 = self::enumeratePermissions($obj1);
2438                 $recipients2 = self::enumeratePermissions($obj2);
2439                 sort($recipients1);
2440                 sort($recipients2);
2441
2442                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2443                 return ($recipients1 == $recipients2);
2444         }
2445
2446         // returns an array of contact-ids that are allowed to see this object
2447         private static function enumeratePermissions($obj)
2448         {
2449                 $allow_people = expand_acl($obj['allow_cid']);
2450                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2451                 $deny_people  = expand_acl($obj['deny_cid']);
2452                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2453                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2454                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2455                 $recipients   = array_diff($recipients, $deny);
2456                 return $recipients;
2457         }
2458
2459         public static function getFeedTags($item)
2460         {
2461                 $ret = [];
2462                 $matches = false;
2463                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2464                 if ($cnt) {
2465                         for ($x = 0; $x < $cnt; $x ++) {
2466                                 if ($matches[1][$x]) {
2467                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2468                                 }
2469                         }
2470                 }
2471                 $matches = false;
2472                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2473                 if ($cnt) {
2474                         for ($x = 0; $x < $cnt; $x ++) {
2475                                 if ($matches[1][$x]) {
2476                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2477                                 }
2478                         }
2479                 }
2480                 return $ret;
2481         }
2482
2483         public static function expire($uid, $days, $network = "", $force = false)
2484         {
2485                 if (!$uid || ($days < 1)) {
2486                         return;
2487                 }
2488
2489                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2490                         $uid, GRAVITY_PARENT];
2491
2492                 /*
2493                  * $expire_network_only = save your own wall posts
2494                  * and just expire conversations started by others
2495                  */
2496                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
2497
2498                 if ($expire_network_only) {
2499                         $condition[0] .= " AND NOT `wall`";
2500                 }
2501
2502                 if ($network != "") {
2503                         $condition[0] .= " AND `network` = ?";
2504                         $condition[] = $network;
2505
2506                         /*
2507                          * There is an index "uid_network_received" but not "uid_network_created"
2508                          * This avoids the creation of another index just for one purpose.
2509                          * And it doesn't really matter wether to look at "received" or "created"
2510                          */
2511                         $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2512                         $condition[] = $days;
2513                 } else {
2514                         $condition[0] .= " AND `created` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2515                         $condition[] = $days;
2516                 }
2517
2518                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id'], $condition);
2519
2520                 if (!DBM::is_result($items)) {
2521                         return;
2522                 }
2523
2524                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
2525
2526                 // Forcing expiring of items - but not notes and marked items
2527                 if ($force) {
2528                         $expire_items = true;
2529                 }
2530
2531                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
2532                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
2533                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
2534
2535                 $expired = 0;
2536
2537                 while ($item = Item::fetch($items)) {
2538                         // don't expire filed items
2539
2540                         if (strpos($item['file'], '[') !== false) {
2541                                 continue;
2542                         }
2543
2544                         // Only expire posts, not photos and photo comments
2545
2546                         if (!$expire_photos && strlen($item['resource-id'])) {
2547                                 continue;
2548                         } elseif (!$expire_starred && intval($item['starred'])) {
2549                                 continue;
2550                         } elseif (!$expire_notes && $item['type'] == 'note') {
2551                                 continue;
2552                         } elseif (!$expire_items && $item['type'] != 'note') {
2553                                 continue;
2554                         }
2555
2556                         self::deleteById($item['id'], PRIORITY_LOW);
2557
2558                         ++$expired;
2559                 }
2560                 dba::close($items);
2561                 logger('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2562         }
2563
2564         public static function firstPostDate($uid, $wall = false)
2565         {
2566                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2567                 $params = ['order' => ['created' => false]];
2568                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2569                 if (DBM::is_result($thread)) {
2570                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2571                 }
2572                 return false;
2573         }
2574
2575         /**
2576          * @brief add/remove activity to an item
2577          *
2578          * Toggle activities as like,dislike,attend of an item
2579          *
2580          * @param string $item_id
2581          * @param string $verb
2582          *              Activity verb. One of
2583          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2584          *                      attendno, unattendno, attendmaybe, unattendmaybe
2585          * @hook 'post_local_end'
2586          *              array $arr
2587          *                      'post_id' => ID of posted item
2588          */
2589         public static function performLike($item_id, $verb)
2590         {
2591                 if (!local_user() && !remote_user()) {
2592                         return false;
2593                 }
2594
2595                 switch ($verb) {
2596                         case 'like':
2597                         case 'unlike':
2598                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
2599                                 $activity = ACTIVITY_LIKE;
2600                                 break;
2601                         case 'dislike':
2602                         case 'undislike':
2603                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
2604                                 $activity = ACTIVITY_DISLIKE;
2605                                 break;
2606                         case 'attendyes':
2607                         case 'unattendyes':
2608                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
2609                                 $activity = ACTIVITY_ATTEND;
2610                                 break;
2611                         case 'attendno':
2612                         case 'unattendno':
2613                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
2614                                 $activity = ACTIVITY_ATTENDNO;
2615                                 break;
2616                         case 'attendmaybe':
2617                         case 'unattendmaybe':
2618                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
2619                                 $activity = ACTIVITY_ATTENDMAYBE;
2620                                 break;
2621                         default:
2622                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2623                                 return false;
2624                 }
2625
2626                 // Enable activity toggling instead of on/off
2627                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2628
2629                 logger('like: verb ' . $verb . ' item ' . $item_id);
2630
2631                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2632                 if (!DBM::is_result($item)) {
2633                         logger('like: unknown item ' . $item_id);
2634                         return false;
2635                 }
2636
2637                 $uid = $item['uid'];
2638                 if (($uid == 0) && local_user()) {
2639                         $uid = local_user();
2640                 }
2641
2642                 if (!can_write_wall($uid)) {
2643                         logger('like: unable to write on wall ' . $uid);
2644                         return false;
2645                 }
2646
2647                 // Retrieves the local post owner
2648                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2649                 if (!DBM::is_result($owner_self_contact)) {
2650                         logger('like: unknown owner ' . $uid);
2651                         return false;
2652                 }
2653
2654                 // Retrieve the current logged in user's public contact
2655                 $author_id = public_contact();
2656
2657                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
2658                 if (!DBM::is_result($author_contact)) {
2659                         logger('like: unknown author ' . $author_id);
2660                         return false;
2661                 }
2662
2663                 // Contact-id is the uid-dependant author contact
2664                 if (local_user() == $uid) {
2665                         $item_contact_id = $owner_self_contact['id'];
2666                         $item_contact = $owner_self_contact;
2667                 } else {
2668                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2669                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2670                         if (!DBM::is_result($item_contact)) {
2671                                 logger('like: unknown item contact ' . $item_contact_id);
2672                                 return false;
2673                         }
2674                 }
2675
2676                 // Look for an existing verb row
2677                 // event participation are essentially radio toggles. If you make a subsequent choice,
2678                 // we need to eradicate your first choice.
2679                 if ($event_verb_flag) {
2680                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
2681                 } else {
2682                         $verbs = $activity;
2683                 }
2684
2685                 $base_condition = ['verb' => $verbs, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2686                         'author-id' => $author_contact['id'], 'uid' => item['uid']];
2687
2688                 $condition = array_merge($base_condition, ['parent' => $item_id]);
2689                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2690
2691                 if (!DBM::is_result($like_item)) {
2692                         $condition = array_merge($base_condition, ['parent-uri' => $item_id]);
2693                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2694                 }
2695
2696                 if (!DBM::is_result($like_item)) {
2697                         $condition = array_merge($base_condition, ['thr-parent' => $item_id]);
2698                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2699                 }
2700
2701                 // If it exists, mark it as deleted
2702                 if (DBM::is_result($like_item)) {
2703                         // Already voted, undo it
2704                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2705                         /// @todo Consider using self::update - but before doing so, check the side effects
2706                         dba::update('item', $fields, ['id' => $like_item['id']]);
2707
2708                         // Clean up the Diaspora signatures for this like
2709                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
2710                         // if it had been enabled in the past
2711                         dba::delete('sign', ['iid' => $like_item['id']]);
2712
2713                         $like_item_id = $like_item['id'];
2714                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
2715
2716                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2717                                 return true;
2718                         }
2719                 }
2720
2721                 // Verb is "un-something", just trying to delete existing entries
2722                 if (strpos($verb, 'un') === 0) {
2723                         return true;
2724                 }
2725
2726                 // Else or if event verb different from existing row, create a new item row
2727                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2728                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2729                         $post_type = L10n::t('event');
2730                 }
2731                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2732                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2733                 $body = $item['body'];
2734
2735                 $obj = <<< EOT
2736
2737                 <object>
2738                         <type>$objtype</type>
2739                         <local>1</local>
2740                         <id>{$item['uri']}</id>
2741                         <link>$link</link>
2742                         <title></title>
2743                         <content>$body</content>
2744                 </object>
2745 EOT;
2746
2747                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2748                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2749                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2750
2751                 $new_item = [
2752                         'guid'          => get_guid(32),
2753                         'uri'           => self::newURI($item['uid']),
2754                         'uid'           => $item['uid'],
2755                         'contact-id'    => $item_contact_id,
2756                         'type'          => 'activity',
2757                         'wall'          => $item['wall'],
2758                         'origin'        => 1,
2759                         'gravity'       => GRAVITY_ACTIVITY,
2760                         'parent'        => $item['id'],
2761                         'parent-uri'    => $item['uri'],
2762                         'thr-parent'    => $item['uri'],
2763                         'owner-id'      => $item['owner-id'],
2764                         'owner-name'    => $item['owner-name'],
2765                         'owner-link'    => $item['owner-link'],
2766                         'owner-avatar'  => $item['owner-avatar'],
2767                         'author-id'     => $author_contact['id'],
2768                         'author-name'   => $author_contact['name'],
2769                         'author-link'   => $author_contact['url'],
2770                         'author-avatar' => $author_contact['thumb'],
2771                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2772                         'verb'          => $activity,
2773                         'object-type'   => $objtype,
2774                         'object'        => $obj,
2775                         'allow_cid'     => $item['allow_cid'],
2776                         'allow_gid'     => $item['allow_gid'],
2777                         'deny_cid'      => $item['deny_cid'],
2778                         'deny_gid'      => $item['deny_gid'],
2779                         'visible'       => 1,
2780                         'unseen'        => 1,
2781                 ];
2782
2783                 $new_item_id = self::insert($new_item);
2784
2785                 // If the parent item isn't visible then set it to visible
2786                 if (!$item['visible']) {
2787                         self::update(['visible' => true], ['id' => $item['id']]);
2788                 }
2789
2790                 // Save the author information for the like in case we need to relay to Diaspora
2791                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2792
2793                 $new_item['id'] = $new_item_id;
2794
2795                 Addon::callHooks('post_local_end', $new_item);
2796
2797                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2798
2799                 return true;
2800         }
2801
2802         private static function addThread($itemid, $onlyshadow = false)
2803         {
2804                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2805                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2806                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2807                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2808                 $item = self::selectFirst($fields, $condition);
2809
2810                 if (!DBM::is_result($item)) {
2811                         return;
2812                 }
2813
2814                 $item['iid'] = $itemid;
2815
2816                 if (!$onlyshadow) {
2817                         $result = dba::insert('thread', $item);
2818
2819                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2820                 }
2821         }
2822
2823         private static function updateThread($itemid, $setmention = false)
2824         {
2825                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
2826                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2827                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
2828                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2829
2830                 $item = self::selectFirst($fields, $condition);
2831                 if (!DBM::is_result($item)) {
2832                         return;
2833                 }
2834
2835                 if ($setmention) {
2836                         $item["mention"] = 1;
2837                 }
2838
2839                 $sql = "";
2840
2841                 $fields = [];
2842
2843                 foreach ($item as $field => $data) {
2844                         if (!in_array($field, ["guid"])) {
2845                                 $fields[$field] = $data;
2846                         }
2847                 }
2848
2849                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2850
2851                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2852         }
2853
2854         private static function deleteThread($itemid, $itemuri = "")
2855         {
2856                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2857                 if (!DBM::is_result($item)) {
2858                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2859                         return;
2860                 }
2861
2862                 // Using dba::delete at this time could delete the associated item entries
2863                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2864
2865                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2866
2867                 if ($itemuri != "") {
2868                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2869                         if (!self::exists($condition)) {
2870                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2871                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2872                         }
2873                 }
2874         }
2875 }