src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use dba;
  10 use Friendica\BaseObject;
  11 use Friendica\Content\Text;
  12 use Friendica\Core\Addon;
  13 use Friendica\Core\Config;
  14 use Friendica\Core\L10n;
  15 use Friendica\Core\Lock;
  16 use Friendica\Core\PConfig;
  17 use Friendica\Core\System;
  18 use Friendica\Core\Worker;
  19 use Friendica\Database\DBM;
  20 use Friendica\Object\Image;
  21 use Friendica\Protocol\Diaspora;
  22 use Friendica\Protocol\OStatus;
  23 use Friendica\Util\DateTimeFormat;
  24 use Friendica\Util\XML;
  25 use Text_LanguageDetect;
  26
  27 require_once 'boot.php';
  28 require_once 'include/items.php';
  29 require_once 'include/text.php';
  30
  31 class Item extends BaseObject
  32 {
  33         // Field list that is used to display the items
  34         const DISPLAY_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network',
  35                         'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  36                         'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  37                         'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  38                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  39                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  40                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  41                         'contact-id', 'contact-link', 'contact-name', 'contact-avatar',
  42                         'writable', 'self', 'cid', 'alias',
  43                         'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  44                         'event-summary', 'event-desc', 'event-location', 'event-type',
  45                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
  46
  47         // Field list that is used to deliver items via the protocols
  48         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  49                         'created', 'edited', 'verb', 'object-type', 'object', 'target',
  50                         'private', 'title', 'body', 'location', 'coord', 'app',
  51                         'attach', 'tag', 'bookmark', 'deleted', 'extid',
  52                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  53                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  54                         'signed_text', 'signature', 'signer'];
  55
  56         // Field list for "item-content" table that is mixed with the item table
  57         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  58                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  59                         'object-type', 'object', 'target-type', 'target', 'plink'];
  60
  61         // Field list for "item-content" table that is not present in the "item" table
  62         const CONTENT_FIELDLIST = ['language'];
  63
  64         // All fields in the item table
  65         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  66                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid',
  67                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  68                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  69                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  70                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  71                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  72                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  73                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  74                         'author-id', 'author-link', 'author-name', 'author-avatar',
  75                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  76
  77         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  78         // The item-activity table only stores the index and needs this array to know the matching activity.
  79         const ACTIVITIES = [ACTIVITY_LIKE, ACTIVITY_DISLIKE, ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
  80
  81         /**
  82          * @brief returns an activity index from an activity string
  83          *
  84          * @param string $activity activity string
  85          * @return integer Activity index
  86          */
  87         private static function activityToIndex($activity)
  88         {
  89                 $index = array_search($activity, self::ACTIVITIES);
  90
  91                 if (is_bool($index)) {
  92                         $index = -1;
  93                 }
  94
  95                 return $index;
  96         }
  97
  98         /**
  99          * @brief returns an activity string from an activity index
 100          *
 101          * @param integer $index activity index
 102          * @return string Activity string
 103          */
 104         private static function indexToActivity($index)
 105         {
 106                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 107                         return '';
 108                 }
 109
 110                 return self::ACTIVITIES[$index];
 111         }
 112
 113         /**
 114          * @brief Fetch a single item row
 115          *
 116          * @param mixed $stmt statement object
 117          * @return array current row
 118          */
 119         public static function fetch($stmt)
 120         {
 121                 $row = dba::fetch($stmt);
 122
 123                 if (is_bool($row)) {
 124                         return $row;
 125                 }
 126
 127                 // ---------------------- Transform item structure data ----------------------
 128
 129                 // We prefer the data from the user's contact over the public one
 130                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 131                         ($row['author-link'] == $row['contact-link'])) {
 132                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 133                                 $row['author-avatar'] = $row['contact-avatar'];
 134                         }
 135                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 136                                 $row['author-name'] = $row['contact-name'];
 137                         }
 138                 }
 139
 140                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 141                         ($row['owner-link'] == $row['contact-link'])) {
 142                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 143                                 $row['owner-avatar'] = $row['contact-avatar'];
 144                         }
 145                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 146                                 $row['owner-name'] = $row['contact-name'];
 147                         }
 148                 }
 149
 150                 // We can always comment on posts from these networks
 151                 if (array_key_exists('writable', $row) &&
 152                         in_array($row['internal-network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
 153                         $row['writable'] = true;
 154                 }
 155
 156                 // ---------------------- Transform item content data ----------------------
 157
 158                 // Fetch data from the item-content table whenever there is content there
 159                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 160                         if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 161                                 $row[$field] = $row['internal-item-' . $field];
 162                         }
 163                         unset($row['internal-item-' . $field]);
 164                 }
 165
 166                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 167                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 168                         if (array_key_exists('title', $row)) {
 169                                 $row['title'] = '';
 170                         }
 171                         if (array_key_exists('body', $row)) {
 172                                 $row['body'] = $row['verb'];
 173                         }
 174                         if (array_key_exists('object', $row)) {
 175                                 $row['object'] = '';
 176                         }
 177                         if (array_key_exists('object-type', $row)) {
 178                                 $row['object-type'] = ACTIVITY_OBJ_NOTE;
 179                         }
 180                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', ACTIVITY_POST, ACTIVITY_SHARE])) {
 181                         // Posts don't have an object or target - but having tags or files.
 182                         // We safe some performance by building tag and file strings only here.
 183                         // We remove object and target since they aren't used for this type.
 184                         if (array_key_exists('object', $row)) {
 185                                 $row['object'] = '';
 186                         }
 187                         if (array_key_exists('target', $row)) {
 188                                 $row['target'] = '';
 189                         }
 190                 }
 191
 192                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', ACTIVITY_POST, ACTIVITY_SHARE])) {
 193                         // Build the tag string out of the term entries
 194                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 195                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 196                         }
 197
 198                         // Build the file string out of the term entries
 199                         if (array_key_exists('file', $row) && empty($row['file'])) {
 200                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 201                         }
 202                 }
 203
 204                 // Remove internal fields
 205                 unset($row['internal-activity']);
 206                 unset($row['internal-network']);
 207                 unset($row['internal-iid']);
 208                 unset($row['internal-iaid']);
 209                 unset($row['internal-icid']);
 210
 211                 return $row;
 212         }
 213
 214         /**
 215          * @brief Fills an array with data from an item query
 216          *
 217          * @param object $stmt statement object
 218          * @return array Data array
 219          */
 220         public static function inArray($stmt, $do_close = true) {
 221                 if (is_bool($stmt)) {
 222                         return $stmt;
 223                 }
 224
 225                 $data = [];
 226                 while ($row = self::fetch($stmt)) {
 227                         $data[] = $row;
 228                 }
 229                 if ($do_close) {
 230                         dba::close($stmt);
 231                 }
 232                 return $data;
 233         }
 234
 235         /**
 236          * @brief Check if item data exists
 237          *
 238          * @param array $condition array of fields for condition
 239          *
 240          * @return boolean Are there rows for that condition?
 241          */
 242         public static function exists($condition) {
 243                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 244
 245                 if (is_bool($stmt)) {
 246                         $retval = $stmt;
 247                 } else {
 248                         $retval = (dba::num_rows($stmt) > 0);
 249                 }
 250
 251                 dba::close($stmt);
 252
 253                 return $retval;
 254         }
 255
 256         /**
 257          * Retrieve a single record from the item table for a given user and returns it in an associative array
 258          *
 259          * @brief Retrieve a single record from a table
 260          * @param integer $uid User ID
 261          * @param array  $fields
 262          * @param array  $condition
 263          * @param array  $params
 264          * @return bool|array
 265          * @see dba::select
 266          */
 267         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 268         {
 269                 $params['uid'] = $uid;
 270
 271                 if (empty($selected)) {
 272                         $selected = Item::DISPLAY_FIELDLIST;
 273                 }
 274
 275                 return self::selectFirst($selected, $condition, $params);
 276         }
 277
 278         /**
 279          * @brief Select rows from the item table for a given user
 280          *
 281          * @param integer $uid User ID
 282          * @param array  $selected  Array of selected fields, empty for all
 283          * @param array  $condition Array of fields for condition
 284          * @param array  $params    Array of several parameters
 285          *
 286          * @return boolean|object
 287          */
 288         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 289         {
 290                 $params['uid'] = $uid;
 291
 292                 if (empty($selected)) {
 293                         $selected = Item::DISPLAY_FIELDLIST;
 294                 }
 295
 296                 return self::select($selected, $condition, $params);
 297         }
 298
 299         /**
 300          * Retrieve a single record from the item table and returns it in an associative array
 301          *
 302          * @brief Retrieve a single record from a table
 303          * @param array  $fields
 304          * @param array  $condition
 305          * @param array  $params
 306          * @return bool|array
 307          * @see dba::select
 308          */
 309         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 310         {
 311                 $params['limit'] = 1;
 312
 313                 $result = self::select($fields, $condition, $params);
 314
 315                 if (is_bool($result)) {
 316                         return $result;
 317                 } else {
 318                         $row = self::fetch($result);
 319                         dba::close($result);
 320                         return $row;
 321                 }
 322         }
 323
 324         /**
 325          * @brief Select rows from the item table
 326          *
 327          * @param array  $selected  Array of selected fields, empty for all
 328          * @param array  $condition Array of fields for condition
 329          * @param array  $params    Array of several parameters
 330          *
 331          * @return boolean|object
 332          */
 333         public static function select(array $selected = [], array $condition = [], $params = [])
 334         {
 335                 $uid = 0;
 336                 $usermode = false;
 337
 338                 if (isset($params['uid'])) {
 339                         $uid = $params['uid'];
 340                         $usermode = true;
 341                 }
 342
 343                 $fields = self::fieldlist($selected);
 344
 345                 $select_fields = self::constructSelectFields($fields, $selected);
 346
 347                 $condition_string = dba::buildCondition($condition);
 348
 349                 $condition_string = self::addTablesToFields($condition_string, $fields);
 350
 351                 if ($usermode) {
 352                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 353                 }
 354
 355                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 356
 357                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 358
 359                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 360
 361                 return dba::p($sql, $condition);
 362         }
 363
 364         /**
 365          * @brief Select rows from the starting post in the item table
 366          *
 367          * @param integer $uid User ID
 368          * @param array  $fields    Array of selected fields, empty for all
 369          * @param array  $condition Array of fields for condition
 370          * @param array  $params    Array of several parameters
 371          *
 372          * @return boolean|object
 373          */
 374         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 375         {
 376                 $params['uid'] = $uid;
 377
 378                 if (empty($selected)) {
 379                         $selected = Item::DISPLAY_FIELDLIST;
 380                 }
 381
 382                 return self::selectThread($selected, $condition, $params);
 383         }
 384
 385         /**
 386          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 387          *
 388          * @brief Retrieve a single record from a table
 389          * @param integer $uid User ID
 390          * @param array  $selected
 391          * @param array  $condition
 392          * @param array  $params
 393          * @return bool|array
 394          * @see dba::select
 395          */
 396         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 397         {
 398                 $params['uid'] = $uid;
 399
 400                 if (empty($selected)) {
 401                         $selected = Item::DISPLAY_FIELDLIST;
 402                 }
 403
 404                 return self::selectFirstThread($selected, $condition, $params);
 405         }
 406
 407         /**
 408          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 409          *
 410          * @brief Retrieve a single record from a table
 411          * @param array  $fields
 412          * @param array  $condition
 413          * @param array  $params
 414          * @return bool|array
 415          * @see dba::select
 416          */
 417         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 418         {
 419                 $params['limit'] = 1;
 420                 $result = self::selectThread($fields, $condition, $params);
 421
 422                 if (is_bool($result)) {
 423                         return $result;
 424                 } else {
 425                         $row = self::fetch($result);
 426                         dba::close($result);
 427                         return $row;
 428                 }
 429         }
 430
 431         /**
 432          * @brief Select rows from the starting post in the item table
 433          *
 434          * @param array  $selected  Array of selected fields, empty for all
 435          * @param array  $condition Array of fields for condition
 436          * @param array  $params    Array of several parameters
 437          *
 438          * @return boolean|object
 439          */
 440         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 441         {
 442                 $uid = 0;
 443                 $usermode = false;
 444
 445                 if (isset($params['uid'])) {
 446                         $uid = $params['uid'];
 447                         $usermode = true;
 448                 }
 449
 450                 $fields = self::fieldlist($selected);
 451
 452                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 453                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 454                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 455                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 456
 457                 $select_fields = self::constructSelectFields($fields, $selected);
 458
 459                 $condition_string = dba::buildCondition($condition);
 460
 461                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 462                 $condition_string = self::addTablesToFields($condition_string, $fields);
 463
 464                 if ($usermode) {
 465                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 466                 }
 467
 468                 $param_string = dba::buildParameter($params);
 469                 $param_string = self::addTablesToFields($param_string, $threadfields);
 470                 $param_string = self::addTablesToFields($param_string, $fields);
 471
 472                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 473
 474                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 475
 476                 return dba::p($sql, $condition);
 477         }
 478
 479         /**
 480          * @brief Returns a list of fields that are associated with the item table
 481          *
 482          * @return array field list
 483          */
 484         private static function fieldlist($selected)
 485         {
 486                 $fields = [];
 487
 488                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 489                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 490                         'created', 'edited', 'commented', 'received', 'changed', 'postopts',
 491                         'resource-id', 'event-id', 'tag', 'attach', 'inform',
 492                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 493                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 494                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 495                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 496                         'network' => 'internal-network', 'icid' => 'internal-icid',
 497                         'iaid' => 'internal-iaid'];
 498
 499                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 500
 501                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 502
 503                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 504                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 505
 506                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 507                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 508
 509                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 510                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 511                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 512
 513                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 514
 515                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 516
 517                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 518                         'start' => 'event-start','finish' => 'event-finish',
 519                         'summary' => 'event-summary','desc' => 'event-desc',
 520                         'location' => 'event-location', 'type' => 'event-type',
 521                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 522                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 523
 524                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 525
 526                 return $fields;
 527         }
 528
 529         /**
 530          * @brief Returns SQL condition for the "select" functions
 531          *
 532          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 533          *
 534          * @return string SQL condition
 535          */
 536         private static function condition($thread_mode)
 537         {
 538                 if ($thread_mode) {
 539                         $master_table = "`thread`";
 540                 } else {
 541                         $master_table = "`item`";
 542                 }
 543                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 544         }
 545
 546         /**
 547          * @brief Returns all needed "JOIN" commands for the "select" functions
 548          *
 549          * @param integer $uid User ID
 550          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 551          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 552          *
 553          * @return string The SQL joins for the "select" functions
 554          */
 555         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 556         {
 557                 if ($thread_mode) {
 558                         $master_table = "`thread`";
 559                         $master_table_key = "`thread`.`iid`";
 560                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 561                 } else {
 562                         $master_table = "`item`";
 563                         $master_table_key = "`item`.`id`";
 564                         $joins = '';
 565                 }
 566
 567                 if ($user_mode) {
 568                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 569                                 AND NOT `contact`.`blocked`
 570                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 571                                 OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 572                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 573                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 574                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 575                                 CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 576                 } else {
 577                         if (strpos($sql_commands, "`contact`.") !== false) {
 578                                 $joins .= "STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 579                         }
 580                         if (strpos($sql_commands, "`author`.") !== false) {
 581                                 $joins .= " STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 582                         }
 583                         if (strpos($sql_commands, "`owner`.") !== false) {
 584                                 $joins .= " STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 585                         }
 586                 }
 587
 588                 if (strpos($sql_commands, "`group_member`.") !== false) {
 589                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 590                 }
 591
 592                 if (strpos($sql_commands, "`user`.") !== false) {
 593                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 594                 }
 595
 596                 if (strpos($sql_commands, "`event`.") !== false) {
 597                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 598                 }
 599
 600                 if (strpos($sql_commands, "`sign`.") !== false) {
 601                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 602                 }
 603
 604                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 605                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`id` = `item`.`iaid`";
 606                 }
 607
 608                 if (strpos($sql_commands, "`item-content`.") !== false) {
 609                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
 610                 }
 611
 612                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 613                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 614                 }
 615
 616                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 617                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 618                 }
 619
 620                 return $joins;
 621         }
 622
 623         /**
 624          * @brief Add the field list for the "select" functions
 625          *
 626          * @param array $fields The field definition array
 627          * @param array $selected The array with the selected fields from the "select" functions
 628          *
 629          * @return string The field list
 630          */
 631         private static function constructSelectFields($fields, $selected)
 632         {
 633                 if (!empty($selected)) {
 634                         $selected[] = 'internal-iid';
 635                         $selected[] = 'internal-iaid';
 636                         $selected[] = 'internal-icid';
 637                         $selected[] = 'internal-network';
 638                 }
 639
 640                 if (in_array('verb', $selected)) {
 641                         $selected[] = 'internal-activity';
 642                 }
 643
 644                 $selection = [];
 645                 foreach ($fields as $table => $table_fields) {
 646                         foreach ($table_fields as $field => $select) {
 647                                 if (empty($selected) || in_array($select, $selected)) {
 648                                         if (in_array($select, self::MIXED_CONTENT_FIELDLIST)) {
 649                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 650                                         }
 651                                         if (is_int($field)) {
 652                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 653                                         } else {
 654                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 655                                         }
 656                                 }
 657                         }
 658                 }
 659                 return implode(", ", $selection);
 660         }
 661
 662         /**
 663          * @brief add table definition to fields in an SQL query
 664          *
 665          * @param string $query SQL query
 666          * @param array $fields The field definition array
 667          *
 668          * @return string the changed SQL query
 669          */
 670         private static function addTablesToFields($query, $fields)
 671         {
 672                 foreach ($fields as $table => $table_fields) {
 673                         foreach ($table_fields as $alias => $field) {
 674                                 if (is_int($alias)) {
 675                                         $replace_field = $field;
 676                                 } else {
 677                                         $replace_field = $alias;
 678                                 }
 679
 680                                 $search = "/([^\.])`" . $field . "`/i";
 681                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 682                                 $query = preg_replace($search, $replace, $query);
 683                         }
 684                 }
 685                 return $query;
 686         }
 687
 688         /**
 689          * @brief Update existing item entries
 690          *
 691          * @param array $fields The fields that are to be changed
 692          * @param array $condition The condition for finding the item entries
 693          *
 694          * In the future we may have to change permissions as well.
 695          * Then we had to add the user id as third parameter.
 696          *
 697          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 698          *
 699          * @return integer|boolean number of affected rows - or "false" if there was an error
 700          */
 701         public static function update(array $fields, array $condition)
 702         {
 703                 if (empty($condition) || empty($fields)) {
 704                         return false;
 705                 }
 706
 707                 // To ensure the data integrity we do it in an transaction
 708                 dba::transaction();
 709
 710                 // We cannot simply expand the condition to check for origin entries
 711                 // The condition needn't to be a simple array but could be a complex condition.
 712                 // And we have to execute this query before the update to ensure to fetch the same data.
 713                 $items = dba::select('item', ['id', 'origin', 'uri', 'plink', 'iaid', 'icid', 'tag', 'file'], $condition);
 714
 715                 $content_fields = [];
 716                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 717                         if (isset($fields[$field])) {
 718                                 $content_fields[$field] = $fields[$field];
 719                                 if (in_array($field, self::CONTENT_FIELDLIST)) {
 720                                         unset($fields[$field]);
 721                                 } else {
 722                                         $fields[$field] = null;
 723                                 }
 724                         }
 725                 }
 726
 727                 $author_owner_fields = ['author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link'];
 728                 foreach ($author_owner_fields as $field) {
 729                         if (isset($fields[$field])) {
 730                                 $fields[$field] = null;
 731                         }
 732                 }
 733
 734                 if (array_key_exists('tag', $fields)) {
 735                         $tags = $fields['tag'];
 736                         unset($fields['tag']);
 737                 } else {
 738                         $tags = '';
 739                 }
 740
 741                 if (array_key_exists('file', $fields)) {
 742                         $files = $fields['file'];
 743                         unset($fields['file']);
 744                 } else {
 745                         $files = '';
 746                 }
 747
 748                 if (!empty($fields)) {
 749                         $success = dba::update('item', $fields, $condition);
 750
 751                         if (!$success) {
 752                                 dba::close($items);
 753                                 dba::rollback();
 754                                 return false;
 755                         }
 756                 }
 757
 758                 // When there is no content for the "old" item table, this will count the fetched items
 759                 $rows = dba::affected_rows();
 760
 761                 while ($item = dba::fetch($items)) {
 762                         if (!empty($item['plink'])) {
 763                                 $content_fields['plink'] = $item['plink'];
 764                         }
 765                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 766                                 self::updateActivity($content_fields, ['uri' => $item['uri']]);
 767
 768                                 if (empty($item['iaid'])) {
 769                                         $item_activity = dba::selectFirst('item-activity', ['id'], ['uri' => $item['uri']]);
 770                                         if (DBM::is_result($item_activity)) {
 771                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 772                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 773                                                         $item_fields[$field] = '';
 774                                                 }
 775                                                 dba::update('item', $item_fields, ['id' => $item['id']]);
 776
 777                                                 if (!empty($item['icid']) && !dba::exists('item', ['icid' => $item['icid']])) {
 778                                                         dba::delete('item-content', ['id' => $item['icid']]);
 779                                                 }
 780                                         }
 781                                 } elseif (!empty($item['icid'])) {
 782                                         dba::update('item', ['icid' => null], ['id' => $item['id']]);
 783
 784                                         if (!dba::exists('item', ['icid' => $item['icid']])) {
 785                                                 dba::delete('item-content', ['id' => $item['icid']]);
 786                                         }
 787                                 }
 788                         } else {
 789                                 self::updateContent($content_fields, ['uri' => $item['uri']]);
 790
 791                                 if (empty($item['icid'])) {
 792                                         $item_content = dba::selectFirst('item-content', [], ['uri' => $item['uri']]);
 793                                         if (DBM::is_result($item_content)) {
 794                                                 $item_fields = ['icid' => $item_content['id']];
 795                                                 // Clear all fields in the item table that have a content in the item-content table
 796                                                 foreach ($item_content as $field => $content) {
 797                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
 798                                                                 $item_fields[$field] = '';
 799                                                         }
 800                                                 }
 801                                                 dba::update('item', $item_fields, ['id' => $item['id']]);
 802                                         }
 803                                 }
 804                         }
 805
 806                         if (!empty($tags)) {
 807                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
 808                                 if (!empty($item['tag'])) {
 809                                         dba::update('item', ['tag' => ''], ['id' => $item['id']]);
 810                                 }
 811                         }
 812
 813                         if (!empty($files)) {
 814                                 Term::insertFromFileFieldByItemId($item['id'], $files);
 815                                 if (!empty($item['file'])) {
 816                                         dba::update('item', ['file' => ''], ['id' => $item['id']]);
 817                                 }
 818                         }
 819
 820                         self::updateThread($item['id']);
 821
 822                         // We only need to notfiy others when it is an original entry from us.
 823                         // Only call the notifier when the item has some content relevant change.
 824                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 825                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 826                         }
 827                 }
 828
 829                 dba::close($items);
 830                 dba::commit();
 831                 return $rows;
 832         }
 833
 834         /**
 835          * @brief Delete an item and notify others about it - if it was ours
 836          *
 837          * @param array $condition The condition for finding the item entries
 838          * @param integer $priority Priority for the notification
 839          */
 840         public static function delete($condition, $priority = PRIORITY_HIGH)
 841         {
 842                 $items = dba::select('item', ['id'], $condition);
 843                 while ($item = dba::fetch($items)) {
 844                         self::deleteById($item['id'], $priority);
 845                 }
 846                 dba::close($items);
 847         }
 848
 849         /**
 850          * @brief Delete an item for an user and notify others about it - if it was ours
 851          *
 852          * @param array $condition The condition for finding the item entries
 853          * @param integer $uid User who wants to delete this item
 854          */
 855         public static function deleteForUser($condition, $uid)
 856         {
 857                 if ($uid == 0) {
 858                         return;
 859                 }
 860
 861                 $items = dba::select('item', ['id', 'uid'], $condition);
 862                 while ($item = dba::fetch($items)) {
 863                         // "Deleting" global items just means hiding them
 864                         if ($item['uid'] == 0) {
 865                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 866                         } elseif ($item['uid'] == $uid) {
 867                                 self::deleteById($item['id'], PRIORITY_HIGH);
 868                         } else {
 869                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 870                         }
 871                 }
 872                 dba::close($items);
 873         }
 874
 875         /**
 876          * @brief Delete an item and notify others about it - if it was ours
 877          *
 878          * @param integer $item_id Item ID that should be delete
 879          * @param integer $priority Priority for the notification
 880          *
 881          * @return boolean success
 882          */
 883         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 884         {
 885                 // locate item to be deleted
 886                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 887                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 888                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 889                 $item = self::selectFirst($fields, ['id' => $item_id]);
 890                 if (!DBM::is_result($item)) {
 891                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 892                         return false;
 893                 }
 894
 895                 if ($item['deleted']) {
 896                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 897                         return false;
 898                 }
 899
 900                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
 901                 if (!DBM::is_result($parent)) {
 902                         $parent = ['origin' => false];
 903                 }
 904
 905                 // clean up categories and tags so they don't end up as orphans
 906
 907                 $matches = false;
 908                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 909                 if ($cnt) {
 910                         foreach ($matches as $mtch) {
 911                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 912                         }
 913                 }
 914
 915                 $matches = false;
 916
 917                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 918                 if ($cnt) {
 919                         foreach ($matches as $mtch) {
 920                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 921                         }
 922                 }
 923
 924                 /*
 925                  * If item is a link to a photo resource, nuke all the associated photos
 926                  * (visitors will not have photo resources)
 927                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 928                  * generate a resource-id and therefore aren't intimately linked to the item.
 929                  */
 930                 if (strlen($item['resource-id'])) {
 931                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 932                 }
 933
 934                 // If item is a link to an event, delete the event.
 935                 if (intval($item['event-id'])) {
 936                         Event::delete($item['event-id']);
 937                 }
 938
 939                 // If item has attachments, drop them
 940                 foreach (explode(", ", $item['attach']) as $attach) {
 941                         preg_match("|attach/(\d+)|", $attach, $matches);
 942                         if (is_array($matches) && count($matches) > 1) {
 943                                 dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 944                         }
 945                 }
 946
 947                 // Delete tags that had been attached to other items
 948                 self::deleteTagsFromItem($item);
 949
 950                 // Set the item to "deleted"
 951                 // This erasing of item content is superfluous for items with a matching item-content.
 952                 // But for the next time we will still have old content in the item table.
 953                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow(),
 954                         'body' => '', 'title' => '', 'content-warning' => '', 'rendered-hash' => '', 'rendered-html' => '',
 955                         'object' => '', 'target' => '', 'tag' => '', 'postopts' => '', 'attach' => '', 'file' => ''];
 956                 dba::update('item', $item_fields, ['id' => $item['id']]);
 957
 958                 Term::insertFromTagFieldByItemId($item['id'], '');
 959                 Term::insertFromFileFieldByItemId($item['id'], '');
 960                 self::deleteThread($item['id'], $item['parent-uri']);
 961
 962                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 963                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 964                 }
 965
 966                 // If it's the parent of a comment thread, kill all the kids
 967                 if ($item['id'] == $item['parent']) {
 968                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 969                 }
 970
 971                 // Is it our comment and/or our thread?
 972                 if ($item['origin'] || $parent['origin']) {
 973
 974                         // When we delete the original post we will delete all existing copies on the server as well
 975                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 976
 977                         // send the notification upstream/downstream
 978                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 979                 } elseif ($item['uid'] != 0) {
 980
 981                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 982                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 983                         if (DBM::is_result($global_item)) {
 984                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 985                         }
 986                 }
 987
 988                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 989
 990                 return true;
 991         }
 992
 993         private static function deleteTagsFromItem($item)
 994         {
 995                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 996                         return;
 997                 }
 998
 999                 $xo = XML::parseString($item["object"], false);
1000                 $xt = XML::parseString($item["target"], false);
1001
1002                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
1003                         return;
1004                 }
1005
1006                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1007                 if (!DBM::is_result($i)) {
1008                         return;
1009                 }
1010
1011                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1012                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1013                 $author_copy = $item["origin"];
1014
1015                 if (($owner_remove && $author_copy) || !$owner_remove) {
1016                         return;
1017                 }
1018
1019                 $tags = explode(',', $i["tag"]);
1020                 $newtags = [];
1021                 if (count($tags)) {
1022                         foreach ($tags as $tag) {
1023                                 if (trim($tag) !== trim($xo->body)) {
1024                                        $newtags[] = trim($tag);
1025                                 }
1026                         }
1027                 }
1028                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1029         }
1030
1031         private static function guid($item, $notify)
1032         {
1033                 $guid = notags(trim($item['guid']));
1034
1035                 if (!empty($guid)) {
1036                         return $guid;
1037                 }
1038
1039                 if ($notify) {
1040                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1041                         // We add the hash of our own host because our host is the original creator of the post.
1042                         $prefix_host = get_app()->get_hostname();
1043                 } else {
1044                         $prefix_host = '';
1045
1046                         // We are only storing the post so we create a GUID from the original hostname.
1047                         if (!empty($item['author-link'])) {
1048                                 $parsed = parse_url($item['author-link']);
1049                                 if (!empty($parsed['host'])) {
1050                                         $prefix_host = $parsed['host'];
1051                                 }
1052                         }
1053
1054                         if (empty($prefix_host) && !empty($item['plink'])) {
1055                                 $parsed = parse_url($item['plink']);
1056                                 if (!empty($parsed['host'])) {
1057                                         $prefix_host = $parsed['host'];
1058                                 }
1059                         }
1060
1061                         if (empty($prefix_host) && !empty($item['uri'])) {
1062                                 $parsed = parse_url($item['uri']);
1063                                 if (!empty($parsed['host'])) {
1064                                         $prefix_host = $parsed['host'];
1065                                 }
1066                         }
1067
1068                         // Is it in the format data@host.tld? - Used for mail contacts
1069                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1070                                 $mailparts = explode('@', $item['author-link']);
1071                                 $prefix_host = array_pop($mailparts);
1072                         }
1073                 }
1074
1075                 if (!empty($item['plink'])) {
1076                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1077                 } elseif (!empty($item['uri'])) {
1078                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1079                 } else {
1080                         $guid = get_guid(32, hash('crc32', $prefix_host));
1081                 }
1082
1083                 return $guid;
1084         }
1085
1086         private static function contactId($item)
1087         {
1088                 $contact_id = (int)$item["contact-id"];
1089
1090                 if (!empty($contact_id)) {
1091                         return $contact_id;
1092                 }
1093                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
1094                 /*
1095                  * First we are looking for a suitable contact that matches with the author of the post
1096                  * This is done only for comments
1097                  */
1098                 if ($item['parent-uri'] != $item['uri']) {
1099                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1100                 }
1101
1102                 // If not present then maybe the owner was found
1103                 if ($contact_id == 0) {
1104                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
1105                 }
1106
1107                 // Still missing? Then use the "self" contact of the current user
1108                 if ($contact_id == 0) {
1109                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
1110                         if (DBM::is_result($self)) {
1111                                 $contact_id = $self["id"];
1112                         }
1113                 }
1114                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
1115
1116                 return $contact_id;
1117         }
1118
1119         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1120         {
1121                 $a = get_app();
1122
1123                 // If it is a posting where users should get notifications, then define it as wall posting
1124                 if ($notify) {
1125                         $item['wall'] = 1;
1126                         $item['type'] = 'wall';
1127                         $item['origin'] = 1;
1128                         $item['network'] = NETWORK_DFRN;
1129                         $item['protocol'] = PROTOCOL_DFRN;
1130
1131                         if (is_int($notify)) {
1132                                 $priority = $notify;
1133                         } else {
1134                                 $priority = PRIORITY_HIGH;
1135                         }
1136                 } else {
1137                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
1138                 }
1139
1140                 $item['guid'] = self::guid($item, $notify);
1141                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
1142
1143                 // Store conversation data
1144                 $item = Conversation::insert($item);
1145
1146                 /*
1147                  * If a Diaspora signature structure was passed in, pull it out of the
1148                  * item array and set it aside for later storage.
1149                  */
1150
1151                 $dsprsig = null;
1152                 if (x($item, 'dsprsig')) {
1153                         $encoded_signature = $item['dsprsig'];
1154                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1155                         unset($item['dsprsig']);
1156                 }
1157
1158                 if (!empty($item['diaspora_signed_text'])) {
1159                         $diaspora_signed_text = $item['diaspora_signed_text'];
1160                         unset($item['diaspora_signed_text']);
1161                 } else {
1162                         $diaspora_signed_text = '';
1163                 }
1164
1165                 // Converting the plink
1166                 /// @TODO Check if this is really still needed
1167                 if ($item['network'] == NETWORK_OSTATUS) {
1168                         if (isset($item['plink'])) {
1169                                 $item['plink'] = OStatus::convertHref($item['plink']);
1170                         } elseif (isset($item['uri'])) {
1171                                 $item['plink'] = OStatus::convertHref($item['uri']);
1172                         }
1173                 }
1174
1175                 if (!empty($item['thr-parent'])) {
1176                         $item['parent-uri'] = $item['thr-parent'];
1177                 }
1178
1179                 $item['type'] = defaults($item, 'type', 'remote');
1180
1181                 if (isset($item['gravity'])) {
1182                         $item['gravity'] = intval($item['gravity']);
1183                 } elseif ($item['parent-uri'] === $item['uri']) {
1184                         $item['gravity'] = GRAVITY_PARENT;
1185                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1186                         $item['gravity'] = GRAVITY_COMMENT;
1187                 } elseif ($item['type'] == 'activity') {
1188                         $item['gravity'] = GRAVITY_ACTIVITY;
1189                 } else {
1190                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1191                         logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
1192                 }
1193
1194                 $uid = intval($item['uid']);
1195
1196                 // check for create date and expire time
1197                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1198
1199                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
1200                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1201                         $expire_interval = $user['expire'];
1202                 }
1203
1204                 if (($expire_interval > 0) && !empty($item['created'])) {
1205                         $expire_date = time() - ($expire_interval * 86400);
1206                         $created_date = strtotime($item['created']);
1207                         if ($created_date < $expire_date) {
1208                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
1209                                 return 0;
1210                         }
1211                 }
1212
1213                 /*
1214                  * Do we already have this item?
1215                  * We have to check several networks since Friendica posts could be repeated
1216                  * via OStatus (maybe Diasporsa as well)
1217                  */
1218                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
1219                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1220                                 trim($item['uri']), $item['uid'],
1221                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
1222                         $existing = self::selectFirst(['id', 'network'], $condition);
1223                         if (DBM::is_result($existing)) {
1224                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1225                                 if ($uid != 0) {
1226                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
1227                                 }
1228
1229                                 return $existing["id"];
1230                         }
1231                 }
1232
1233                 self::addLanguageToItemArray($item);
1234
1235                 $item['wall']          = intval(defaults($item, 'wall', 0));
1236                 $item['extid']         = trim(defaults($item, 'extid', ''));
1237                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1238                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1239                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1240                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1241                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1242                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1243                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1244                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1245                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1246                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1247                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1248                 $item['title']         = trim(defaults($item, 'title', ''));
1249                 $item['location']      = trim(defaults($item, 'location', ''));
1250                 $item['coord']         = trim(defaults($item, 'coord', ''));
1251                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1252                 $item['deleted']       = 0;
1253                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1254                 $item['verb']          = trim(defaults($item, 'verb', ''));
1255                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1256                 $item['object']        = trim(defaults($item, 'object', ''));
1257                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1258                 $item['target']        = trim(defaults($item, 'target', ''));
1259                 $item['plink']         = trim(defaults($item, 'plink', ''));
1260                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1261                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1262                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1263                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1264                 $item['private']       = intval(defaults($item, 'private', 0));
1265                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1266                 $item['body']          = trim(defaults($item, 'body', ''));
1267                 $item['tag']           = trim(defaults($item, 'tag', ''));
1268                 $item['attach']        = trim(defaults($item, 'attach', ''));
1269                 $item['app']           = trim(defaults($item, 'app', ''));
1270                 $item['origin']        = intval(defaults($item, 'origin', 0));
1271                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1272                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1273                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1274                 $item['inform']        = trim(defaults($item, 'inform', ''));
1275                 $item['file']          = trim(defaults($item, 'file', ''));
1276
1277                 // When there is no content then we don't post it
1278                 if ($item['body'].$item['title'] == '') {
1279                         logger('No body, no title.');
1280                         return 0;
1281                 }
1282
1283                 // Items cannot be stored before they happen ...
1284                 if ($item['created'] > DateTimeFormat::utcNow()) {
1285                         $item['created'] = DateTimeFormat::utcNow();
1286                 }
1287
1288                 // We haven't invented time travel by now.
1289                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1290                         $item['edited'] = DateTimeFormat::utcNow();
1291                 }
1292
1293                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1294                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1295                 }
1296
1297                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1298
1299                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1300                 $item["contact-id"] = self::contactId($item);
1301
1302                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1303                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1304
1305                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1306
1307                 if (Contact::isBlocked($item["author-id"])) {
1308                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1309                         return 0;
1310                 }
1311
1312                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1313                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1314
1315                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1316
1317                 if (Contact::isBlocked($item["owner-id"])) {
1318                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1319                         return 0;
1320                 }
1321
1322                 // These fields aren't stored anymore in the item table, they are fetched upon request
1323                 unset($item['author-link']);
1324                 unset($item['author-name']);
1325                 unset($item['author-avatar']);
1326
1327                 unset($item['owner-link']);
1328                 unset($item['owner-name']);
1329                 unset($item['owner-avatar']);
1330
1331                 if ($item['network'] == NETWORK_PHANTOM) {
1332                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1333
1334                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1335                         if (!empty($contact['network'])) {
1336                                 $item['network'] = $contact["network"];
1337                         } else {
1338                                 $item['network'] = NETWORK_DFRN;
1339                         }
1340                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1341                 }
1342
1343                 // Checking if there is already an item with the same guid
1344                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1345                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1346                 if (self::exists($condition)) {
1347                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1348                         return 0;
1349                 }
1350
1351                 // Check for hashtags in the body and repair or add hashtag links
1352                 self::setHashtags($item);
1353
1354                 $item['thr-parent'] = $item['parent-uri'];
1355
1356                 $notify_type = '';
1357                 $allow_cid = '';
1358                 $allow_gid = '';
1359                 $deny_cid  = '';
1360                 $deny_gid  = '';
1361
1362                 if ($item['parent-uri'] === $item['uri']) {
1363                         $parent_id = 0;
1364                         $parent_deleted = 0;
1365                         $allow_cid = $item['allow_cid'];
1366                         $allow_gid = $item['allow_gid'];
1367                         $deny_cid  = $item['deny_cid'];
1368                         $deny_gid  = $item['deny_gid'];
1369                         $notify_type = 'wall-new';
1370                 } else {
1371                         // find the parent and snarf the item id and ACLs
1372                         // and anything else we need to inherit
1373
1374                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1375                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1376                                 'wall', 'private', 'forum_mode', 'origin'];
1377                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1378                         $params = ['order' => ['id' => false]];
1379                         $parent = self::selectFirst($fields, $condition, $params);
1380
1381                         if (DBM::is_result($parent)) {
1382                                 // is the new message multi-level threaded?
1383                                 // even though we don't support it now, preserve the info
1384                                 // and re-attach to the conversation parent.
1385
1386                                 if ($parent['uri'] != $parent['parent-uri']) {
1387                                         $item['parent-uri'] = $parent['parent-uri'];
1388
1389                                         $condition = ['uri' => $item['parent-uri'],
1390                                                 'parent-uri' => $item['parent-uri'],
1391                                                 'uid' => $item['uid']];
1392                                         $params = ['order' => ['id' => false]];
1393                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1394
1395                                         if (DBM::is_result($toplevel_parent)) {
1396                                                 $parent = $toplevel_parent;
1397                                         }
1398                                 }
1399
1400                                 $parent_id      = $parent['id'];
1401                                 $parent_deleted = $parent['deleted'];
1402                                 $allow_cid      = $parent['allow_cid'];
1403                                 $allow_gid      = $parent['allow_gid'];
1404                                 $deny_cid       = $parent['deny_cid'];
1405                                 $deny_gid       = $parent['deny_gid'];
1406                                 $item['wall']    = $parent['wall'];
1407                                 $notify_type    = 'comment-new';
1408
1409                                 /*
1410                                  * If the parent is private, force privacy for the entire conversation
1411                                  * This differs from the above settings as it subtly allows comments from
1412                                  * email correspondents to be private even if the overall thread is not.
1413                                  */
1414                                 if ($parent['private']) {
1415                                         $item['private'] = $parent['private'];
1416                                 }
1417
1418                                 /*
1419                                  * Edge case. We host a public forum that was originally posted to privately.
1420                                  * The original author commented, but as this is a comment, the permissions
1421                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1422                                  */
1423                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1424                                         $item['private'] = 0;
1425                                 }
1426
1427                                 // If its a post from myself then tag the thread as "mention"
1428                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1429                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1430                                 if (DBM::is_result($user)) {
1431                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1432                                         $self_id = Contact::getIdForURL($self, 0, true);
1433                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1434                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1435                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1436                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1437                                         }
1438                                 }
1439                         } else {
1440                                 /*
1441                                  * Allow one to see reply tweets from status.net even when
1442                                  * we don't have or can't see the original post.
1443                                  */
1444                                 if ($force_parent) {
1445                                         logger('$force_parent=true, reply converted to top-level post.');
1446                                         $parent_id = 0;
1447                                         $item['parent-uri'] = $item['uri'];
1448                                         $item['gravity'] = GRAVITY_PARENT;
1449                                 } else {
1450                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1451                                         return 0;
1452                                 }
1453
1454                                 $parent_deleted = 0;
1455                         }
1456                 }
1457
1458                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1459                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1460                 if (self::exists($condition)) {
1461                         logger('duplicated item with the same uri found. '.print_r($item,true));
1462                         return 0;
1463                 }
1464
1465                 // On Friendica and Diaspora the GUID is unique
1466                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1467                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1468                         if (self::exists($condition)) {
1469                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1470                                 return 0;
1471                         }
1472                 } else {
1473                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1474                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1475                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1476                         if (self::exists($condition)) {
1477                                 logger('duplicated item with the same body found. '.print_r($item,true));
1478                                 return 0;
1479                         }
1480                 }
1481
1482                 // Is this item available in the global items (with uid=0)?
1483                 if ($item["uid"] == 0) {
1484                         $item["global"] = true;
1485
1486                         // Set the global flag on all items if this was a global item entry
1487                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1488                 } else {
1489                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1490                 }
1491
1492                 // ACL settings
1493                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1494                         $private = 1;
1495                 } else {
1496                         $private = $item['private'];
1497                 }
1498
1499                 $item["allow_cid"] = $allow_cid;
1500                 $item["allow_gid"] = $allow_gid;
1501                 $item["deny_cid"] = $deny_cid;
1502                 $item["deny_gid"] = $deny_gid;
1503                 $item["private"] = $private;
1504                 $item["deleted"] = $parent_deleted;
1505
1506                 // Fill the cache field
1507                 put_item_in_cache($item);
1508
1509                 if ($notify) {
1510                         Addon::callHooks('post_local', $item);
1511                 } else {
1512                         Addon::callHooks('post_remote', $item);
1513                 }
1514
1515                 // This array field is used to trigger some automatic reactions
1516                 // It is mainly used in the "post_local" hook.
1517                 unset($item['api_source']);
1518
1519                 if (x($item, 'cancel')) {
1520                         logger('post cancelled by addon.');
1521                         return 0;
1522                 }
1523
1524                 /*
1525                  * Check for already added items.
1526                  * There is a timing issue here that sometimes creates double postings.
1527                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1528                  */
1529                 if ($item["uid"] == 0) {
1530                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1531                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1532                                 return 0;
1533                         }
1534                 }
1535
1536                 logger('' . print_r($item,true), LOGGER_DATA);
1537
1538                 if (array_key_exists('tag', $item)) {
1539                         $tags = $item['tag'];
1540                         unset($item['tag']);
1541                 } else {
1542                         $tags = '';
1543                 }
1544
1545                 if (array_key_exists('file', $item)) {
1546                         $files = $item['file'];
1547                         unset($item['file']);
1548                 } else {
1549                         $files = '';
1550                 }
1551
1552                 // We are doing this outside of the transaction to avoid timing problems
1553                 if (!self::insertActivity($item)) {
1554                         self::insertContent($item);
1555                 }
1556
1557                 dba::transaction();
1558                 $ret = dba::insert('item', $item);
1559
1560                 // When the item was successfully stored we fetch the ID of the item.
1561                 if (DBM::is_result($ret)) {
1562                         $current_post = dba::lastInsertId();
1563                 } else {
1564                         // This can happen - for example - if there are locking timeouts.
1565                         dba::rollback();
1566
1567                         // Store the data into a spool file so that we can try again later.
1568
1569                         // At first we restore the Diaspora signature that we removed above.
1570                         if (isset($encoded_signature)) {
1571                                 $item['dsprsig'] = $encoded_signature;
1572                         }
1573
1574                         // Now we store the data in the spool directory
1575                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1576                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1577
1578                         $spoolpath = get_spoolpath();
1579                         if ($spoolpath != "") {
1580                                 $spool = $spoolpath.'/'.$file;
1581                                 file_put_contents($spool, json_encode($item));
1582                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1583                         }
1584                         return 0;
1585                 }
1586
1587                 if ($current_post == 0) {
1588                         // This is one of these error messages that never should occur.
1589                         logger("couldn't find created item - we better quit now.");
1590                         dba::rollback();
1591                         return 0;
1592                 }
1593
1594                 // How much entries have we created?
1595                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1596                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1597
1598                 if ($entries > 1) {
1599                         // There are duplicates. We delete our just created entry.
1600                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1601
1602                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1603                         dba::delete('item', ['id' => $current_post]);
1604                         dba::commit();
1605                         return 0;
1606                 } elseif ($entries == 0) {
1607                         // This really should never happen since we quit earlier if there were problems.
1608                         logger("Something is terribly wrong. We haven't found our created entry.");
1609                         dba::rollback();
1610                         return 0;
1611                 }
1612
1613                 logger('created item '.$current_post);
1614                 self::updateContact($item);
1615
1616                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1617                         $parent_id = $current_post;
1618                 }
1619
1620                 // Set parent id
1621                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1622
1623                 $item['id'] = $current_post;
1624                 $item['parent'] = $parent_id;
1625
1626                 // update the commented timestamp on the parent
1627                 // Only update "commented" if it is really a comment
1628                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1629                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1630                 } else {
1631                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1632                 }
1633
1634                 if ($dsprsig) {
1635                         /*
1636                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1637                          * We can check for this condition when we decode and encode the stuff again.
1638                          */
1639                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1640                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1641                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1642                         }
1643
1644                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1645                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1646                 }
1647
1648                 if (!empty($diaspora_signed_text)) {
1649                         // Formerly we stored the signed text, the signature and the author in different fields.
1650                         // We now store the raw data so that we are more flexible.
1651                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1652                 }
1653
1654                 $deleted = self::tagDeliver($item['uid'], $current_post);
1655
1656                 /*
1657                  * current post can be deleted if is for a community page and no mention are
1658                  * in it.
1659                  */
1660                 if (!$deleted && !$dontcache) {
1661                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1662                         if (DBM::is_result($posted_item)) {
1663                                 if ($notify) {
1664                                         Addon::callHooks('post_local_end', $posted_item);
1665                                 } else {
1666                                         Addon::callHooks('post_remote_end', $posted_item);
1667                                 }
1668                         } else {
1669                                 logger('new item not found in DB, id ' . $current_post);
1670                         }
1671                 }
1672
1673                 if ($item['parent-uri'] === $item['uri']) {
1674                         self::addThread($current_post);
1675                 } else {
1676                         self::updateThread($parent_id);
1677                 }
1678
1679                 dba::commit();
1680
1681                 /*
1682                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1683                  * This is not perfect - but a workable solution until we found the reason for the problem.
1684                  */
1685                 if (!empty($tags)) {
1686                         Term::insertFromTagFieldByItemId($current_post, $tags);
1687                 }
1688
1689                 if (!empty($files)) {
1690                         Term::insertFromFileFieldByItemId($current_post, $files);
1691                 }
1692
1693                 if ($item['parent-uri'] === $item['uri']) {
1694                         self::addShadow($current_post);
1695                 } else {
1696                         self::addShadowPost($current_post);
1697                 }
1698
1699                 check_user_notification($current_post);
1700
1701                 if ($notify) {
1702                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1703                 } elseif (!empty($parent) && $parent['origin']) {
1704                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1705                 }
1706
1707                 return $current_post;
1708         }
1709
1710         /**
1711          * @brief Insert a new item content entry
1712          *
1713          * @param array $item The item fields that are to be inserted
1714          */
1715         private static function insertActivity(&$item)
1716         {
1717                 $activity_index = self::activityToIndex($item['verb']);
1718
1719                 if ($activity_index < 0) {
1720                         return false;
1721                 }
1722
1723                 $fields = ['uri' => $item['uri'], 'activity' => $activity_index,
1724                         'uri-hash' => hash('sha1', $item['uri']) . hash('ripemd160', $item['uri'])];
1725
1726                 $saved_item = $item;
1727
1728                 // We just remove everything that is content
1729                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1730                         unset($item[$field]);
1731                 }
1732
1733                 // To avoid timing problems, we are using locks.
1734                 $locked = Lock::set('item_insert_activity');
1735                 if (!$locked) {
1736                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1737                 }
1738
1739                 // Do we already have this content?
1740                 $item_activity = dba::selectFirst('item-activity', ['id'], ['uri' => $item['uri']]);
1741                 if (DBM::is_result($item_activity)) {
1742                         $item['iaid'] = $item_activity['id'];
1743                         logger('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1744                 } elseif (dba::insert('item-activity', $fields)) {
1745                         $item['iaid'] = dba::lastInsertId();
1746                         logger('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1747                 } else {
1748                         // This shouldn't happen. But if it does, we simply store it in the item-content table
1749                         logger('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
1750                         $item = $saved_item;
1751                         return false;
1752                 }
1753                 if ($locked) {
1754                         Lock::remove('item_insert_activity');
1755                 }
1756                 return true;
1757         }
1758
1759         /**
1760          * @brief Insert a new item content entry
1761          *
1762          * @param array $item The item fields that are to be inserted
1763          */
1764         private static function insertContent(&$item)
1765         {
1766                 $fields = ['uri' => $item['uri'], 'plink' => $item['plink'],
1767                         'uri-plink-hash' => hash('sha1', $item['plink']).hash('sha1', $item['uri'])];
1768
1769                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1770                         if (isset($item[$field])) {
1771                                 $fields[$field] = $item[$field];
1772                                 unset($item[$field]);
1773                         }
1774                 }
1775
1776                 // To avoid timing problems, we are using locks.
1777                 $locked = Lock::acquire('item_insert_content');
1778                 if (!$locked) {
1779                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1780                 }
1781
1782                 // Do we already have this content?
1783                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $item['uri']]);
1784                 if (DBM::is_result($item_content)) {
1785                         $item['icid'] = $item_content['id'];
1786                         logger('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1787                 } elseif (dba::insert('item-content', $fields)) {
1788                         $item['icid'] = dba::lastInsertId();
1789                         logger('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1790                 } else {
1791                         // By setting the ICID value through the worker we should avoid timing problems.
1792                         // When the locking works, this shouldn't be needed. But better be prepared.
1793                         Worker::add(PRIORITY_HIGH, 'SetItemContentID', $item['uri']);
1794                         logger('Could not insert content for URI ' . $item['uri'] . ' - trying asynchronously');
1795                 }
1796                 if ($locked) {
1797                         Lock::release('item_insert_content');
1798                 }
1799         }
1800
1801         /**
1802          * @brief Set the item content id for a given URI
1803          *
1804          * @param string $uri The item URI
1805          */
1806         public static function setICIDforURI($uri)
1807         {
1808                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $uri]);
1809                 if (DBM::is_result($item_content)) {
1810                         dba::update('item', ['icid' => $item_content['id']], ['icid' => 0, 'uri' => $uri]);
1811                         logger('Asynchronously set item content id for URI ' . $uri . ' (' . $item_content['id'] . ') - Affected: '. (int)dba::affected_rows());
1812                 } else {
1813                         logger('No item-content found for URI ' . $uri);
1814                 }
1815         }
1816
1817         /**
1818          * @brief Update existing item content entries
1819          *
1820          * @param array $item The item fields that are to be changed
1821          * @param array $condition The condition for finding the item content entries
1822          */
1823         private static function updateActivity($item, $condition)
1824         {
1825                 if (empty($item['verb'])) {
1826                         return false;
1827                 }
1828                 $activity_index = self::activityToIndex($item['verb']);
1829
1830                 if ($activity_index < 0) {
1831                         return false;
1832                 }
1833
1834                 $fields = ['activity' => $activity_index,
1835                         'uri-hash' => hash('sha1', $condition['uri']) . hash('ripemd160', $condition['uri'])];
1836
1837                 logger('Update activity for URI ' . $condition['uri']);
1838
1839                 dba::update('item-activity', $fields, $condition, true);
1840
1841                 return true;
1842         }
1843
1844         /**
1845          * @brief Update existing item content entries
1846          *
1847          * @param array $item The item fields that are to be changed
1848          * @param array $condition The condition for finding the item content entries
1849          */
1850         private static function updateContent($item, $condition)
1851         {
1852                 // We have to select only the fields from the "item-content" table
1853                 $fields = [];
1854                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1855                         if (isset($item[$field])) {
1856                                 $fields[$field] = $item[$field];
1857                         }
1858                 }
1859
1860                 if (empty($fields)) {
1861                         // when there are no fields at all, just use the condition
1862                         // This is to ensure that we always store content.
1863                         $fields = $condition;
1864                 }
1865
1866                 if (!empty($item['plink'])) {
1867                         $fields['uri-plink-hash'] = hash('sha1', $item['plink']) . hash('sha1', $condition['uri']);
1868                 } else {
1869                         // Ensure that we don't delete the plink
1870                         unset($fields['plink']);
1871                 }
1872
1873                 logger('Update content for URI ' . $condition['uri']);
1874
1875                 dba::update('item-content', $fields, $condition, true);
1876         }
1877
1878         /**
1879          * @brief Distributes public items to the receivers
1880          *
1881          * @param integer $itemid      Item ID that should be added
1882          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1883          */
1884         public static function distribute($itemid, $signed_text = '')
1885         {
1886                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1887                 $parent = self::selectFirst(['owner-id'], $condition);
1888                 if (!DBM::is_result($parent)) {
1889                         return;
1890                 }
1891
1892                 // Only distribute public items from native networks
1893                 $condition = ['id' => $itemid, 'uid' => 0,
1894                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1895                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1896                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1897                 if (!DBM::is_result($item)) {
1898                         return;
1899                 }
1900
1901                 unset($item['id']);
1902                 unset($item['parent']);
1903                 unset($item['mention']);
1904                 unset($item['wall']);
1905                 unset($item['origin']);
1906                 unset($item['starred']);
1907
1908                 $users = [];
1909
1910                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1911                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1912                 $contacts = dba::select('contact', ['uid'], $condition);
1913                 while ($contact = dba::fetch($contacts)) {
1914                         $users[$contact['uid']] = $contact['uid'];
1915                 }
1916
1917                 $origin_uid = 0;
1918
1919                 if ($item['uri'] != $item['parent-uri']) {
1920                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1921                         while ($parent = dba::fetch($parents)) {
1922                                 $users[$parent['uid']] = $parent['uid'];
1923                                 if ($parent['origin'] && !$item['origin']) {
1924                                         $origin_uid = $parent['uid'];
1925                                 }
1926                         }
1927                 }
1928
1929                 foreach ($users as $uid) {
1930                         if ($origin_uid == $uid) {
1931                                 $item['diaspora_signed_text'] = $signed_text;
1932                         }
1933                         self::storeForUser($itemid, $item, $uid);
1934                 }
1935         }
1936
1937         /**
1938          * @brief Store public items for the receivers
1939          *
1940          * @param integer $itemid Item ID that should be added
1941          * @param array   $item   The item entry that will be stored
1942          * @param integer $uid    The user that will receive the item entry
1943          */
1944         private static function storeForUser($itemid, $item, $uid)
1945         {
1946                 $item['uid'] = $uid;
1947                 $item['origin'] = 0;
1948                 $item['wall'] = 0;
1949                 if ($item['uri'] == $item['parent-uri']) {
1950                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1951                 } else {
1952                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1953                 }
1954
1955                 if (empty($item['contact-id'])) {
1956                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1957                         if (!DBM::is_result($self)) {
1958                                 return;
1959                         }
1960                         $item['contact-id'] = $self['id'];
1961                 }
1962
1963                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1964                         $item['type'] = 'remote-comment';
1965                 } elseif ($item['type'] == 'wall') {
1966                         $item['type'] = 'remote';
1967                 }
1968
1969                 /// @todo Handling of "event-id"
1970
1971                 $notify = false;
1972                 if ($item['uri'] == $item['parent-uri']) {
1973                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1974                         if (DBM::is_result($contact)) {
1975                                 $notify = self::isRemoteSelf($contact, $item);
1976                         }
1977                 }
1978
1979                 $distributed = self::insert($item, false, $notify, true);
1980
1981                 if (!$distributed) {
1982                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1983                 } else {
1984                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1985                 }
1986         }
1987
1988         /**
1989          * @brief Add a shadow entry for a given item id that is a thread starter
1990          *
1991          * We store every public item entry additionally with the user id "0".
1992          * This is used for the community page and for the search.
1993          * It is planned that in the future we will store public item entries only once.
1994          *
1995          * @param integer $itemid Item ID that should be added
1996          */
1997         public static function addShadow($itemid)
1998         {
1999                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2000                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2001                 $item = self::selectFirst($fields, $condition);
2002
2003                 if (!DBM::is_result($item)) {
2004                         return;
2005                 }
2006
2007                 // is it already a copy?
2008                 if (($itemid == 0) || ($item['uid'] == 0)) {
2009                         return;
2010                 }
2011
2012                 // Is it a visible public post?
2013                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2014                         return;
2015                 }
2016
2017                 // is it an entry from a connector? Only add an entry for natively connected networks
2018                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
2019                         return;
2020                 }
2021
2022                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2023                         return;
2024                 }
2025
2026                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2027
2028                 if (DBM::is_result($item)) {
2029                         // Preparing public shadow (removing user specific data)
2030                         $item['uid'] = 0;
2031                         unset($item['id']);
2032                         unset($item['parent']);
2033                         unset($item['wall']);
2034                         unset($item['mention']);
2035                         unset($item['origin']);
2036                         unset($item['starred']);
2037                         if ($item['uri'] == $item['parent-uri']) {
2038                                 $item['contact-id'] = $item['owner-id'];
2039                         } else {
2040                                 $item['contact-id'] = $item['author-id'];
2041                         }
2042
2043                         if (in_array($item['type'], ["net-comment", "wall-comment"])) {
2044                                 $item['type'] = 'remote-comment';
2045                         } elseif ($item['type'] == 'wall') {
2046                                 $item['type'] = 'remote';
2047                         }
2048
2049                         $public_shadow = self::insert($item, false, false, true);
2050
2051                         logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
2052                 }
2053         }
2054
2055         /**
2056          * @brief Add a shadow entry for a given item id that is a comment
2057          *
2058          * This function does the same like the function above - but for comments
2059          *
2060          * @param integer $itemid Item ID that should be added
2061          */
2062         public static function addShadowPost($itemid)
2063         {
2064                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2065                 if (!DBM::is_result($item)) {
2066                         return;
2067                 }
2068
2069                 // Is it a toplevel post?
2070                 if ($item['id'] == $item['parent']) {
2071                         self::addShadow($itemid);
2072                         return;
2073                 }
2074
2075                 // Is this a shadow entry?
2076                 if ($item['uid'] == 0) {
2077                         return;
2078                 }
2079
2080                 // Is there a shadow parent?
2081                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2082                         return;
2083                 }
2084
2085                 // Is there already a shadow entry?
2086                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2087                         return;
2088                 }
2089
2090                 // Save "origin" and "parent" state
2091                 $origin = $item['origin'];
2092                 $parent = $item['parent'];
2093
2094                 // Preparing public shadow (removing user specific data)
2095                 $item['uid'] = 0;
2096                 unset($item['id']);
2097                 unset($item['parent']);
2098                 unset($item['wall']);
2099                 unset($item['mention']);
2100                 unset($item['origin']);
2101                 unset($item['starred']);
2102                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2103
2104                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
2105                         $item['type'] = 'remote-comment';
2106                 } elseif ($item['type'] == 'wall') {
2107                         $item['type'] = 'remote';
2108                 }
2109
2110                 $public_shadow = self::insert($item, false, false, true);
2111
2112                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
2113
2114                 // If this was a comment to a Diaspora post we don't get our comment back.
2115                 // This means that we have to distribute the comment by ourselves.
2116                 if ($origin && self::exists(['id' => $parent, 'network' => NETWORK_DIASPORA])) {
2117                         self::distribute($public_shadow);
2118                 }
2119         }
2120
2121          /**
2122          * Adds a language specification in a "language" element of given $arr.
2123          * Expects "body" element to exist in $arr.
2124          */
2125         private static function addLanguageToItemArray(&$item)
2126         {
2127                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
2128
2129                 $ld = new Text_LanguageDetect();
2130                 $ld->setNameMode(2);
2131                 $languages = $ld->detect($naked_body, 3);
2132
2133                 if (is_array($languages)) {
2134                         $item['language'] = json_encode($languages);
2135                 }
2136         }
2137
2138         /**
2139          * @brief Creates an unique guid out of a given uri
2140          *
2141          * @param string $uri uri of an item entry
2142          * @param string $host hostname for the GUID prefix
2143          * @return string unique guid
2144          */
2145         public static function guidFromUri($uri, $host)
2146         {
2147                 // Our regular guid routine is using this kind of prefix as well
2148                 // We have to avoid that different routines could accidentally create the same value
2149                 $parsed = parse_url($uri);
2150
2151                 // We use a hash of the hostname as prefix for the guid
2152                 $guid_prefix = hash("crc32", $host);
2153
2154                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2155                 unset($parsed["scheme"]);
2156
2157                 // Glue it together to be able to make a hash from it
2158                 $host_id = implode("/", $parsed);
2159
2160                 // We could use any hash algorithm since it isn't a security issue
2161                 $host_hash = hash("ripemd128", $host_id);
2162
2163                 return $guid_prefix.$host_hash;
2164         }
2165
2166         /**
2167          * generate an unique URI
2168          *
2169          * @param integer $uid User id
2170          * @param string $guid An existing GUID (Otherwise it will be generated)
2171          *
2172          * @return string
2173          */
2174         public static function newURI($uid, $guid = "")
2175         {
2176                 if ($guid == "") {
2177                         $guid = get_guid(32);
2178                 }
2179
2180                 $hostname = self::getApp()->get_hostname();
2181
2182                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
2183
2184                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
2185
2186                 return $uri;
2187         }
2188
2189         /**
2190          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2191          *
2192          * This can be used to filter for inactive contacts.
2193          * Only do this for public postings to avoid privacy problems, since poco data is public.
2194          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2195          *
2196          * @param array $arr Contains the just posted item record
2197          */
2198         private static function updateContact($arr)
2199         {
2200                 // Unarchive the author
2201                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2202                 if (DBM::is_result($contact)) {
2203                         Contact::unmarkForArchival($contact);
2204                 }
2205
2206                 // Unarchive the contact if it's not our own contact
2207                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2208                 if (DBM::is_result($contact)) {
2209                         Contact::unmarkForArchival($contact);
2210                 }
2211
2212                 $update = (!$arr['private'] && ((defaults($arr, 'author-link', '') === defaults($arr, 'owner-link', '')) || ($arr["parent-uri"] === $arr["uri"])));
2213
2214                 // Is it a forum? Then we don't care about the rules from above
2215                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
2216                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2217                                 $update = true;
2218                         }
2219                 }
2220
2221                 if ($update) {
2222                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2223                                 ['id' => $arr['contact-id']]);
2224                 }
2225                 // Now do the same for the system wide contacts with uid=0
2226                 if (!$arr['private']) {
2227                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2228                                 ['id' => $arr['owner-id']]);
2229
2230                         if ($arr['owner-id'] != $arr['author-id']) {
2231                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2232                                         ['id' => $arr['author-id']]);
2233                         }
2234                 }
2235         }
2236
2237         public static function setHashtags(&$item)
2238         {
2239
2240                 $tags = get_tags($item["body"]);
2241
2242                 // No hashtags?
2243                 if (!count($tags)) {
2244                         return false;
2245                 }
2246
2247                 // This sorting is important when there are hashtags that are part of other hashtags
2248                 // Otherwise there could be problems with hashtags like #test and #test2
2249                 rsort($tags);
2250
2251                 $URLSearchString = "^\[\]";
2252
2253                 // All hashtags should point to the home server if "local_tags" is activated
2254                 if (Config::get('system', 'local_tags')) {
2255                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2256                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2257
2258                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2259                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2260                 }
2261
2262                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2263                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2264                         function ($match) {
2265                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2266                         }, $item["body"]);
2267
2268                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2269                         function ($match) {
2270                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2271                         }, $item["body"]);
2272
2273                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2274                         function ($match) {
2275                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2276                         }, $item["body"]);
2277
2278                 // Repair recursive urls
2279                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2280                                 "&num;$2", $item["body"]);
2281
2282                 foreach ($tags as $tag) {
2283                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
2284                                 continue;
2285                         }
2286
2287                         $basetag = str_replace('_',' ',substr($tag,1));
2288
2289                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
2290
2291                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2292
2293                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2294                                 if (strlen($item["tag"])) {
2295                                         $item["tag"] = ','.$item["tag"];
2296                                 }
2297                                 $item["tag"] = $newtag.$item["tag"];
2298                         }
2299                 }
2300
2301                 // Convert back the masked hashtags
2302                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2303         }
2304
2305         public static function getGuidById($id)
2306         {
2307                 $item = self::selectFirst(['guid'], ['id' => $id]);
2308                 if (DBM::is_result($item)) {
2309                         return $item['guid'];
2310                 } else {
2311                         return '';
2312                 }
2313         }
2314
2315         public static function getIdAndNickByGuid($guid, $uid = 0)
2316         {
2317                 $nick = "";
2318                 $id = 0;
2319
2320                 if ($uid == 0) {
2321                         $uid == local_user();
2322                 }
2323
2324                 // Does the given user have this item?
2325                 if ($uid) {
2326                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2327                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2328                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2329                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
2330                         if (DBM::is_result($item)) {
2331                                 $id = $item["id"];
2332                                 $nick = $item["nickname"];
2333                         }
2334                 }
2335
2336                 // Or is it anywhere on the server?
2337                 if ($nick == "") {
2338                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2339                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2340                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2341                                         AND NOT `item`.`private` AND `item`.`wall`
2342                                         AND `item`.`guid` = ?", $guid);
2343                         if (DBM::is_result($item)) {
2344                                 $id = $item["id"];
2345                                 $nick = $item["nickname"];
2346                         }
2347                 }
2348                 return ["nick" => $nick, "id" => $id];
2349         }
2350
2351         /**
2352          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2353          * @param int $uid
2354          * @param int $item_id
2355          * @return bool true if item was deleted, else false
2356          */
2357         private static function tagDeliver($uid, $item_id)
2358         {
2359                 $mention = false;
2360
2361                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
2362                 if (!DBM::is_result($user)) {
2363                         return;
2364                 }
2365
2366                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
2367                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
2368
2369                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2370                 if (!DBM::is_result($item)) {
2371                         return;
2372                 }
2373
2374                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
2375
2376                 /*
2377                  * Diaspora uses their own hardwired link URL in @-tags
2378                  * instead of the one we supply with webfinger
2379                  */
2380                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
2381
2382                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2383                 if ($cnt) {
2384                         foreach ($matches as $mtch) {
2385                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
2386                                         $mention = true;
2387                                         logger('mention found: ' . $mtch[2]);
2388                                 }
2389                         }
2390                 }
2391
2392                 if (!$mention) {
2393                         if (($community_page || $prvgroup) &&
2394                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2395                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2396                                 // delete it!
2397                                 logger("no-mention top-level post to community or private group. delete.");
2398                                 dba::delete('item', ['id' => $item_id]);
2399                                 return true;
2400                         }
2401                         return;
2402                 }
2403
2404                 $arr = ['item' => $item, 'user' => $user];
2405
2406                 Addon::callHooks('tagged', $arr);
2407
2408                 if (!$community_page && !$prvgroup) {
2409                         return;
2410                 }
2411
2412                 /*
2413                  * tgroup delivery - setup a second delivery chain
2414                  * prevent delivery looping - only proceed
2415                  * if the message originated elsewhere and is a top-level post
2416                  */
2417                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2418                         return;
2419                 }
2420
2421                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2422                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2423                 if (!DBM::is_result($self)) {
2424                         return;
2425                 }
2426
2427                 $owner_id = Contact::getIdForURL($self['url']);
2428
2429                 // also reset all the privacy bits to the forum default permissions
2430
2431                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2432
2433                 $forum_mode = ($prvgroup ? 2 : 1);
2434
2435                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2436                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
2437                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
2438                 dba::update('item', $fields, ['id' => $item_id]);
2439
2440                 self::updateThread($item_id);
2441
2442                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2443         }
2444
2445         public static function isRemoteSelf($contact, &$datarray)
2446         {
2447                 $a = get_app();
2448
2449                 if (!$contact['remote_self']) {
2450                         return false;
2451                 }
2452
2453                 // Prevent the forwarding of posts that are forwarded
2454                 if ($datarray["extid"] == NETWORK_DFRN) {
2455                         logger('Already forwarded', LOGGER_DEBUG);
2456                         return false;
2457                 }
2458
2459                 // Prevent to forward already forwarded posts
2460                 if ($datarray["app"] == $a->get_hostname()) {
2461                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2462                         return false;
2463                 }
2464
2465                 // Only forward posts
2466                 if ($datarray["verb"] != ACTIVITY_POST) {
2467                         logger('No post', LOGGER_DEBUG);
2468                         return false;
2469                 }
2470
2471                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2472                         logger('Not public', LOGGER_DEBUG);
2473                         return false;
2474                 }
2475
2476                 $datarray2 = $datarray;
2477                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2478                 if ($contact['remote_self'] == 2) {
2479                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2480                                         ['uid' => $contact['uid'], 'self' => true]);
2481                         if (DBM::is_result($self)) {
2482                                 $datarray['contact-id'] = $self["id"];
2483
2484                                 $datarray['owner-name'] = $self["name"];
2485                                 $datarray['owner-link'] = $self["url"];
2486                                 $datarray['owner-avatar'] = $self["thumb"];
2487
2488                                 $datarray['author-name']   = $datarray['owner-name'];
2489                                 $datarray['author-link']   = $datarray['owner-link'];
2490                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2491
2492                                 unset($datarray['created']);
2493                                 unset($datarray['edited']);
2494
2495                                 unset($datarray['network']);
2496                                 unset($datarray['owner-id']);
2497                                 unset($datarray['author-id']);
2498                         }
2499
2500                         if ($contact['network'] != NETWORK_FEED) {
2501                                 $datarray["guid"] = get_guid(32);
2502                                 unset($datarray["plink"]);
2503                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2504                                 $datarray["parent-uri"] = $datarray["uri"];
2505                                 $datarray["thr-parent"] = $datarray["uri"];
2506                                 $datarray["extid"] = NETWORK_DFRN;
2507                                 $urlpart = parse_url($datarray2['author-link']);
2508                                 $datarray["app"] = $urlpart["host"];
2509                         } else {
2510                                 $datarray['private'] = 0;
2511                         }
2512                 }
2513
2514                 if ($contact['network'] != NETWORK_FEED) {
2515                         // Store the original post
2516                         $result = self::insert($datarray2, false, false);
2517                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2518                 } else {
2519                         $datarray["app"] = "Feed";
2520                         $result = true;
2521                 }
2522
2523                 // Trigger automatic reactions for addons
2524                 $datarray['api_source'] = true;
2525
2526                 // We have to tell the hooks who we are - this really should be improved
2527                 $_SESSION["authenticated"] = true;
2528                 $_SESSION["uid"] = $contact['uid'];
2529
2530                 return $result;
2531         }
2532
2533         /**
2534          *
2535          * @param string $s
2536          * @param int    $uid
2537          * @param array  $item
2538          * @param int    $cid
2539          * @return string
2540          */
2541         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2542         {
2543                 if (Config::get('system', 'disable_embedded')) {
2544                         return $s;
2545                 }
2546
2547                 logger('check for photos', LOGGER_DEBUG);
2548                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2549
2550                 $orig_body = $s;
2551                 $new_body = '';
2552
2553                 $img_start = strpos($orig_body, '[img');
2554                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2555                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2556
2557                 while (($img_st_close !== false) && ($img_len !== false)) {
2558                         $img_st_close++; // make it point to AFTER the closing bracket
2559                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2560
2561                         logger('found photo ' . $image, LOGGER_DEBUG);
2562
2563                         if (stristr($image, $site . '/photo/')) {
2564                                 // Only embed locally hosted photos
2565                                 $replace = false;
2566                                 $i = basename($image);
2567                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2568                                 $x = strpos($i, '-');
2569
2570                                 if ($x) {
2571                                         $res = substr($i, $x + 1);
2572                                         $i = substr($i, 0, $x);
2573                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2574                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2575                                         if (DBM::is_result($photo)) {
2576                                                 /*
2577                                                  * Check to see if we should replace this photo link with an embedded image
2578                                                  * 1. No need to do so if the photo is public
2579                                                  * 2. If there's a contact-id provided, see if they're in the access list
2580                                                  *    for the photo. If so, embed it.
2581                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2582                                                  *    permissions, regardless of order but first check to see if they're an exact
2583                                                  *    match to save some processing overhead.
2584                                                  */
2585                                                 if (self::hasPermissions($photo)) {
2586                                                         if ($cid) {
2587                                                                 $recips = self::enumeratePermissions($photo);
2588                                                                 if (in_array($cid, $recips)) {
2589                                                                         $replace = true;
2590                                                                 }
2591                                                         } elseif ($item) {
2592                                                                 if (self::samePermissions($item, $photo)) {
2593                                                                         $replace = true;
2594                                                                 }
2595                                                         }
2596                                                 }
2597                                                 if ($replace) {
2598                                                         $data = $photo['data'];
2599                                                         $type = $photo['type'];
2600
2601                                                         // If a custom width and height were specified, apply before embedding
2602                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2603                                                                 logger('scaling photo', LOGGER_DEBUG);
2604
2605                                                                 $width = intval($match[1]);
2606                                                                 $height = intval($match[2]);
2607
2608                                                                 $Image = new Image($data, $type);
2609                                                                 if ($Image->isValid()) {
2610                                                                         $Image->scaleDown(max($width, $height));
2611                                                                         $data = $Image->asString();
2612                                                                         $type = $Image->getType();
2613                                                                 }
2614                                                         }
2615
2616                                                         logger('replacing photo', LOGGER_DEBUG);
2617                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2618                                                         logger('replaced: ' . $image, LOGGER_DATA);
2619                                                 }
2620                                         }
2621                                 }
2622                         }
2623
2624                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2625                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2626                         if ($orig_body === false) {
2627                                 $orig_body = '';
2628                         }
2629
2630                         $img_start = strpos($orig_body, '[img');
2631                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2632                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2633                 }
2634
2635                 $new_body = $new_body . $orig_body;
2636
2637                 return $new_body;
2638         }
2639
2640         private static function hasPermissions($obj)
2641         {
2642                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2643                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2644         }
2645
2646         private static function samePermissions($obj1, $obj2)
2647         {
2648                 // first part is easy. Check that these are exactly the same.
2649                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2650                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2651                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2652                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2653                         return true;
2654                 }
2655
2656                 // This is harder. Parse all the permissions and compare the resulting set.
2657                 $recipients1 = self::enumeratePermissions($obj1);
2658                 $recipients2 = self::enumeratePermissions($obj2);
2659                 sort($recipients1);
2660                 sort($recipients2);
2661
2662                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2663                 return ($recipients1 == $recipients2);
2664         }
2665
2666         // returns an array of contact-ids that are allowed to see this object
2667         private static function enumeratePermissions($obj)
2668         {
2669                 $allow_people = expand_acl($obj['allow_cid']);
2670                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2671                 $deny_people  = expand_acl($obj['deny_cid']);
2672                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2673                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2674                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2675                 $recipients   = array_diff($recipients, $deny);
2676                 return $recipients;
2677         }
2678
2679         public static function getFeedTags($item)
2680         {
2681                 $ret = [];
2682                 $matches = false;
2683                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2684                 if ($cnt) {
2685                         for ($x = 0; $x < $cnt; $x ++) {
2686                                 if ($matches[1][$x]) {
2687                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2688                                 }
2689                         }
2690                 }
2691                 $matches = false;
2692                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2693                 if ($cnt) {
2694                         for ($x = 0; $x < $cnt; $x ++) {
2695                                 if ($matches[1][$x]) {
2696                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2697                                 }
2698                         }
2699                 }
2700                 return $ret;
2701         }
2702
2703         public static function expire($uid, $days, $network = "", $force = false)
2704         {
2705                 if (!$uid || ($days < 1)) {
2706                         return;
2707                 }
2708
2709                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2710                         $uid, GRAVITY_PARENT];
2711
2712                 /*
2713                  * $expire_network_only = save your own wall posts
2714                  * and just expire conversations started by others
2715                  */
2716                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
2717
2718                 if ($expire_network_only) {
2719                         $condition[0] .= " AND NOT `wall`";
2720                 }
2721
2722                 if ($network != "") {
2723                         $condition[0] .= " AND `network` = ?";
2724                         $condition[] = $network;
2725
2726                         /*
2727                          * There is an index "uid_network_received" but not "uid_network_created"
2728                          * This avoids the creation of another index just for one purpose.
2729                          * And it doesn't really matter wether to look at "received" or "created"
2730                          */
2731                         $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2732                         $condition[] = $days;
2733                 } else {
2734                         $condition[0] .= " AND `created` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2735                         $condition[] = $days;
2736                 }
2737
2738                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id'], $condition);
2739
2740                 if (!DBM::is_result($items)) {
2741                         return;
2742                 }
2743
2744                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
2745
2746                 // Forcing expiring of items - but not notes and marked items
2747                 if ($force) {
2748                         $expire_items = true;
2749                 }
2750
2751                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
2752                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
2753                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
2754
2755                 $expired = 0;
2756
2757                 while ($item = Item::fetch($items)) {
2758                         // don't expire filed items
2759
2760                         if (strpos($item['file'], '[') !== false) {
2761                                 continue;
2762                         }
2763
2764                         // Only expire posts, not photos and photo comments
2765
2766                         if (!$expire_photos && strlen($item['resource-id'])) {
2767                                 continue;
2768                         } elseif (!$expire_starred && intval($item['starred'])) {
2769                                 continue;
2770                         } elseif (!$expire_notes && $item['type'] == 'note') {
2771                                 continue;
2772                         } elseif (!$expire_items && $item['type'] != 'note') {
2773                                 continue;
2774                         }
2775
2776                         self::deleteById($item['id'], PRIORITY_LOW);
2777
2778                         ++$expired;
2779                 }
2780                 dba::close($items);
2781                 logger('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2782         }
2783
2784         public static function firstPostDate($uid, $wall = false)
2785         {
2786                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2787                 $params = ['order' => ['created' => false]];
2788                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2789                 if (DBM::is_result($thread)) {
2790                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2791                 }
2792                 return false;
2793         }
2794
2795         /**
2796          * @brief add/remove activity to an item
2797          *
2798          * Toggle activities as like,dislike,attend of an item
2799          *
2800          * @param string $item_id
2801          * @param string $verb
2802          *              Activity verb. One of
2803          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2804          *                      attendno, unattendno, attendmaybe, unattendmaybe
2805          * @hook 'post_local_end'
2806          *              array $arr
2807          *                      'post_id' => ID of posted item
2808          */
2809         public static function performLike($item_id, $verb)
2810         {
2811                 if (!local_user() && !remote_user()) {
2812                         return false;
2813                 }
2814
2815                 switch ($verb) {
2816                         case 'like':
2817                         case 'unlike':
2818                                 $activity = ACTIVITY_LIKE;
2819                                 break;
2820                         case 'dislike':
2821                         case 'undislike':
2822                                 $activity = ACTIVITY_DISLIKE;
2823                                 break;
2824                         case 'attendyes':
2825                         case 'unattendyes':
2826                                 $activity = ACTIVITY_ATTEND;
2827                                 break;
2828                         case 'attendno':
2829                         case 'unattendno':
2830                                 $activity = ACTIVITY_ATTENDNO;
2831                                 break;
2832                         case 'attendmaybe':
2833                         case 'unattendmaybe':
2834                                 $activity = ACTIVITY_ATTENDMAYBE;
2835                                 break;
2836                         default:
2837                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2838                                 return false;
2839                 }
2840
2841                 // Enable activity toggling instead of on/off
2842                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2843
2844                 logger('like: verb ' . $verb . ' item ' . $item_id);
2845
2846                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2847                 if (!DBM::is_result($item)) {
2848                         logger('like: unknown item ' . $item_id);
2849                         return false;
2850                 }
2851
2852                 $item_uri = $item['uri'];
2853
2854                 $uid = $item['uid'];
2855                 if (($uid == 0) && local_user()) {
2856                         $uid = local_user();
2857                 }
2858
2859                 if (!can_write_wall($uid)) {
2860                         logger('like: unable to write on wall ' . $uid);
2861                         return false;
2862                 }
2863
2864                 // Retrieves the local post owner
2865                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2866                 if (!DBM::is_result($owner_self_contact)) {
2867                         logger('like: unknown owner ' . $uid);
2868                         return false;
2869                 }
2870
2871                 // Retrieve the current logged in user's public contact
2872                 $author_id = public_contact();
2873
2874                 $author_contact = dba::selectFirst('contact', ['url'], ['id' => $author_id]);
2875                 if (!DBM::is_result($author_contact)) {
2876                         logger('like: unknown author ' . $author_id);
2877                         return false;
2878                 }
2879
2880                 // Contact-id is the uid-dependant author contact
2881                 if (local_user() == $uid) {
2882                         $item_contact_id = $owner_self_contact['id'];
2883                         $item_contact = $owner_self_contact;
2884                 } else {
2885                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2886                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2887                         if (!DBM::is_result($item_contact)) {
2888                                 logger('like: unknown item contact ' . $item_contact_id);
2889                                 return false;
2890                         }
2891                 }
2892
2893                 // Look for an existing verb row
2894                 // event participation are essentially radio toggles. If you make a subsequent choice,
2895                 // we need to eradicate your first choice.
2896                 if ($event_verb_flag) {
2897                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
2898
2899                         // Translate to the index based activity index
2900                         $activities = [];
2901                         foreach ($verbs as $verb) {
2902                                 $activities[] = self::activityToIndex($verb);
2903                         }
2904                 } else {
2905                         $activities = self::activityToIndex($activity);
2906                 }
2907
2908                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2909                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
2910
2911                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2912
2913                 // If it exists, mark it as deleted
2914                 if (DBM::is_result($like_item)) {
2915                         // Already voted, undo it
2916                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2917                         /// @todo Consider using self::update - but before doing so, check the side effects
2918                         dba::update('item', $fields, ['id' => $like_item['id']]);
2919
2920                         // Clean up the Diaspora signatures for this like
2921                         dba::delete('sign', ['iid' => $like_item['id']]);
2922
2923                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item['id']);
2924
2925                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2926                                 return true;
2927                         }
2928                 }
2929
2930                 // Verb is "un-something", just trying to delete existing entries
2931                 if (strpos($verb, 'un') === 0) {
2932                         return true;
2933                 }
2934
2935                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2936
2937                 $new_item = [
2938                         'guid'          => get_guid(32),
2939                         'uri'           => self::newURI($item['uid']),
2940                         'uid'           => $item['uid'],
2941                         'contact-id'    => $item_contact_id,
2942                         'type'          => 'activity',
2943                         'wall'          => $item['wall'],
2944                         'origin'        => 1,
2945                         'gravity'       => GRAVITY_ACTIVITY,
2946                         'parent'        => $item['id'],
2947                         'parent-uri'    => $item['uri'],
2948                         'thr-parent'    => $item['uri'],
2949                         'owner-id'      => $item['owner-id'],
2950                         'author-id'     => $author_id,
2951                         'body'          => $activity,
2952                         'verb'          => $activity,
2953                         'object-type'   => $objtype,
2954                         'allow_cid'     => $item['allow_cid'],
2955                         'allow_gid'     => $item['allow_gid'],
2956                         'deny_cid'      => $item['deny_cid'],
2957                         'deny_gid'      => $item['deny_gid'],
2958                         'visible'       => 1,
2959                         'unseen'        => 1,
2960                 ];
2961
2962                 $new_item_id = self::insert($new_item);
2963
2964                 // If the parent item isn't visible then set it to visible
2965                 if (!$item['visible']) {
2966                         self::update(['visible' => true], ['id' => $item['id']]);
2967                 }
2968
2969                 // Save the author information for the like in case we need to relay to Diaspora
2970                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2971
2972                 $new_item['id'] = $new_item_id;
2973
2974                 Addon::callHooks('post_local_end', $new_item);
2975
2976                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2977
2978                 return true;
2979         }
2980
2981         private static function addThread($itemid, $onlyshadow = false)
2982         {
2983                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2984                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2985                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2986                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2987                 $item = self::selectFirst($fields, $condition);
2988
2989                 if (!DBM::is_result($item)) {
2990                         return;
2991                 }
2992
2993                 $item['iid'] = $itemid;
2994
2995                 if (!$onlyshadow) {
2996                         $result = dba::insert('thread', $item);
2997
2998                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2999                 }
3000         }
3001
3002         private static function updateThread($itemid, $setmention = false)
3003         {
3004                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
3005                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
3006                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3007                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3008
3009                 $item = self::selectFirst($fields, $condition);
3010                 if (!DBM::is_result($item)) {
3011                         return;
3012                 }
3013
3014                 if ($setmention) {
3015                         $item["mention"] = 1;
3016                 }
3017
3018                 $sql = "";
3019
3020                 $fields = [];
3021
3022                 foreach ($item as $field => $data) {
3023                         if (!in_array($field, ["guid"])) {
3024                                 $fields[$field] = $data;
3025                         }
3026                 }
3027
3028                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
3029
3030                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
3031         }
3032
3033         private static function deleteThread($itemid, $itemuri = "")
3034         {
3035                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3036                 if (!DBM::is_result($item)) {
3037                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
3038                         return;
3039                 }
3040
3041                 // Using dba::delete at this time could delete the associated item entries
3042                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
3043
3044                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
3045
3046                 if ($itemuri != "") {
3047                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3048                         if (!self::exists($condition)) {
3049                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3050                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
3051                         }
3052                 }
3053         }
3054 }