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