src/Model/Item.php

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