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