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', 'network'];
  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 $field) {
 729                         if (array_key_exists($field, $fields)) {
 730                                 $fields[$field] = null;
 731                         }
 732                 }
 733
 734                 if (array_key_exists('tag', $fields)) {
 735                         $tags = $fields['tag'];
 736                         $fields['tag'] = null;
 737                 } else {
 738                         $tags = '';
 739                 }
 740
 741                 if (array_key_exists('file', $fields)) {
 742                         $files = $fields['file'];
 743                         $fields['file'] = null;
 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, $notify)
1032         {
1033                 if (!empty($item['guid'])) {
1034                         return notags(trim($item['guid']));
1035                 }
1036
1037                 if ($notify) {
1038                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1039                         // We add the hash of our own host because our host is the original creator of the post.
1040                         $prefix_host = get_app()->get_hostname();
1041                 } else {
1042                         $prefix_host = '';
1043
1044                         // We are only storing the post so we create a GUID from the original hostname.
1045                         if (!empty($item['author-link'])) {
1046                                 $parsed = parse_url($item['author-link']);
1047                                 if (!empty($parsed['host'])) {
1048                                         $prefix_host = $parsed['host'];
1049                                 }
1050                         }
1051
1052                         if (empty($prefix_host) && !empty($item['plink'])) {
1053                                 $parsed = parse_url($item['plink']);
1054                                 if (!empty($parsed['host'])) {
1055                                         $prefix_host = $parsed['host'];
1056                                 }
1057                         }
1058
1059                         if (empty($prefix_host) && !empty($item['uri'])) {
1060                                 $parsed = parse_url($item['uri']);
1061                                 if (!empty($parsed['host'])) {
1062                                         $prefix_host = $parsed['host'];
1063                                 }
1064                         }
1065
1066                         // Is it in the format data@host.tld? - Used for mail contacts
1067                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1068                                 $mailparts = explode('@', $item['author-link']);
1069                                 $prefix_host = array_pop($mailparts);
1070                         }
1071                 }
1072
1073                 if (!empty($item['plink'])) {
1074                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1075                 } elseif (!empty($item['uri'])) {
1076                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1077                 } else {
1078                         $guid = System::createGUID(32, hash('crc32', $prefix_host));
1079                 }
1080
1081                 return $guid;
1082         }
1083
1084         private static function contactId($item)
1085         {
1086                 $contact_id = (int)$item["contact-id"];
1087
1088                 if (!empty($contact_id)) {
1089                         return $contact_id;
1090                 }
1091                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
1092                 /*
1093                  * First we are looking for a suitable contact that matches with the author of the post
1094                  * This is done only for comments
1095                  */
1096                 if ($item['parent-uri'] != $item['uri']) {
1097                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1098                 }
1099
1100                 // If not present then maybe the owner was found
1101                 if ($contact_id == 0) {
1102                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
1103                 }
1104
1105                 // Still missing? Then use the "self" contact of the current user
1106                 if ($contact_id == 0) {
1107                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
1108                         if (DBM::is_result($self)) {
1109                                 $contact_id = $self["id"];
1110                         }
1111                 }
1112                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
1113
1114                 return $contact_id;
1115         }
1116
1117         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1118         {
1119                 $a = get_app();
1120
1121                 // If it is a posting where users should get notifications, then define it as wall posting
1122                 if ($notify) {
1123                         $item['wall'] = 1;
1124                         $item['type'] = 'wall';
1125                         $item['origin'] = 1;
1126                         $item['network'] = NETWORK_DFRN;
1127                         $item['protocol'] = PROTOCOL_DFRN;
1128
1129                         if (is_int($notify)) {
1130                                 $priority = $notify;
1131                         } else {
1132                                 $priority = PRIORITY_HIGH;
1133                         }
1134                 } else {
1135                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
1136                 }
1137
1138                 $item['guid'] = self::guid($item, $notify);
1139                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
1140
1141                 // Store conversation data
1142                 $item = Conversation::insert($item);
1143
1144                 /*
1145                  * If a Diaspora signature structure was passed in, pull it out of the
1146                  * item array and set it aside for later storage.
1147                  */
1148
1149                 $dsprsig = null;
1150                 if (x($item, 'dsprsig')) {
1151                         $encoded_signature = $item['dsprsig'];
1152                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1153                         unset($item['dsprsig']);
1154                 }
1155
1156                 if (!empty($item['diaspora_signed_text'])) {
1157                         $diaspora_signed_text = $item['diaspora_signed_text'];
1158                         unset($item['diaspora_signed_text']);
1159                 } else {
1160                         $diaspora_signed_text = '';
1161                 }
1162
1163                 // Converting the plink
1164                 /// @TODO Check if this is really still needed
1165                 if ($item['network'] == NETWORK_OSTATUS) {
1166                         if (isset($item['plink'])) {
1167                                 $item['plink'] = OStatus::convertHref($item['plink']);
1168                         } elseif (isset($item['uri'])) {
1169                                 $item['plink'] = OStatus::convertHref($item['uri']);
1170                         }
1171                 }
1172
1173                 if (!empty($item['thr-parent'])) {
1174                         $item['parent-uri'] = $item['thr-parent'];
1175                 }
1176
1177                 $item['type'] = defaults($item, 'type', 'remote');
1178
1179                 if (isset($item['gravity'])) {
1180                         $item['gravity'] = intval($item['gravity']);
1181                 } elseif ($item['parent-uri'] === $item['uri']) {
1182                         $item['gravity'] = GRAVITY_PARENT;
1183                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1184                         $item['gravity'] = GRAVITY_COMMENT;
1185                 } elseif ($item['type'] == 'activity') {
1186                         $item['gravity'] = GRAVITY_ACTIVITY;
1187                 } else {
1188                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1189                         logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
1190                 }
1191
1192                 $uid = intval($item['uid']);
1193
1194                 // check for create date and expire time
1195                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1196
1197                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
1198                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1199                         $expire_interval = $user['expire'];
1200                 }
1201
1202                 if (($expire_interval > 0) && !empty($item['created'])) {
1203                         $expire_date = time() - ($expire_interval * 86400);
1204                         $created_date = strtotime($item['created']);
1205                         if ($created_date < $expire_date) {
1206                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
1207                                 return 0;
1208                         }
1209                 }
1210
1211                 /*
1212                  * Do we already have this item?
1213                  * We have to check several networks since Friendica posts could be repeated
1214                  * via OStatus (maybe Diasporsa as well)
1215                  */
1216                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
1217                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1218                                 trim($item['uri']), $item['uid'],
1219                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
1220                         $existing = self::selectFirst(['id', 'network'], $condition);
1221                         if (DBM::is_result($existing)) {
1222                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1223                                 if ($uid != 0) {
1224                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
1225                                 }
1226
1227                                 return $existing["id"];
1228                         }
1229                 }
1230
1231                 self::addLanguageToItemArray($item);
1232
1233                 $item['wall']          = intval(defaults($item, 'wall', 0));
1234                 $item['extid']         = trim(defaults($item, 'extid', ''));
1235                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1236                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1237                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1238                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1239                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1240                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1241                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1242                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1243                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1244                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1245                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1246                 $item['title']         = trim(defaults($item, 'title', ''));
1247                 $item['location']      = trim(defaults($item, 'location', ''));
1248                 $item['coord']         = trim(defaults($item, 'coord', ''));
1249                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1250                 $item['deleted']       = 0;
1251                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1252                 $item['verb']          = trim(defaults($item, 'verb', ''));
1253                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1254                 $item['object']        = trim(defaults($item, 'object', ''));
1255                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1256                 $item['target']        = trim(defaults($item, 'target', ''));
1257                 $item['plink']         = trim(defaults($item, 'plink', ''));
1258                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1259                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1260                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1261                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1262                 $item['private']       = intval(defaults($item, 'private', 0));
1263                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1264                 $item['body']          = trim(defaults($item, 'body', ''));
1265                 $item['tag']           = trim(defaults($item, 'tag', ''));
1266                 $item['attach']        = trim(defaults($item, 'attach', ''));
1267                 $item['app']           = trim(defaults($item, 'app', ''));
1268                 $item['origin']        = intval(defaults($item, 'origin', 0));
1269                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1270                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1271                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1272                 $item['inform']        = trim(defaults($item, 'inform', ''));
1273                 $item['file']          = trim(defaults($item, 'file', ''));
1274
1275                 // When there is no content then we don't post it
1276                 if ($item['body'].$item['title'] == '') {
1277                         logger('No body, no title.');
1278                         return 0;
1279                 }
1280
1281                 // Items cannot be stored before they happen ...
1282                 if ($item['created'] > DateTimeFormat::utcNow()) {
1283                         $item['created'] = DateTimeFormat::utcNow();
1284                 }
1285
1286                 // We haven't invented time travel by now.
1287                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1288                         $item['edited'] = DateTimeFormat::utcNow();
1289                 }
1290
1291                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1292                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1293                 }
1294
1295                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1296
1297                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1298                 $item["contact-id"] = self::contactId($item);
1299
1300                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1301                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1302
1303                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1304
1305                 if (Contact::isBlocked($item["author-id"])) {
1306                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1307                         return 0;
1308                 }
1309
1310                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1311                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1312
1313                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1314
1315                 if (Contact::isBlocked($item["owner-id"])) {
1316                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1317                         return 0;
1318                 }
1319
1320                 // These fields aren't stored anymore in the item table, they are fetched upon request
1321                 unset($item['author-link']);
1322                 unset($item['author-name']);
1323                 unset($item['author-avatar']);
1324
1325                 unset($item['owner-link']);
1326                 unset($item['owner-name']);
1327                 unset($item['owner-avatar']);
1328
1329                 if ($item['network'] == NETWORK_PHANTOM) {
1330                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1331
1332                         $item['network'] = NETWORK_DFRN;
1333                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1334                 }
1335
1336                 // Checking if there is already an item with the same guid
1337                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1338                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1339                 if (self::exists($condition)) {
1340                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1341                         return 0;
1342                 }
1343
1344                 // Check for hashtags in the body and repair or add hashtag links
1345                 self::setHashtags($item);
1346
1347                 $item['thr-parent'] = $item['parent-uri'];
1348
1349                 $notify_type = '';
1350                 $allow_cid = '';
1351                 $allow_gid = '';
1352                 $deny_cid  = '';
1353                 $deny_gid  = '';
1354
1355                 if ($item['parent-uri'] === $item['uri']) {
1356                         $parent_id = 0;
1357                         $parent_deleted = 0;
1358                         $allow_cid = $item['allow_cid'];
1359                         $allow_gid = $item['allow_gid'];
1360                         $deny_cid  = $item['deny_cid'];
1361                         $deny_gid  = $item['deny_gid'];
1362                         $notify_type = 'wall-new';
1363                 } else {
1364                         // find the parent and snarf the item id and ACLs
1365                         // and anything else we need to inherit
1366
1367                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1368                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1369                                 'wall', 'private', 'forum_mode', 'origin'];
1370                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1371                         $params = ['order' => ['id' => false]];
1372                         $parent = self::selectFirst($fields, $condition, $params);
1373
1374                         if (DBM::is_result($parent)) {
1375                                 // is the new message multi-level threaded?
1376                                 // even though we don't support it now, preserve the info
1377                                 // and re-attach to the conversation parent.
1378
1379                                 if ($parent['uri'] != $parent['parent-uri']) {
1380                                         $item['parent-uri'] = $parent['parent-uri'];
1381
1382                                         $condition = ['uri' => $item['parent-uri'],
1383                                                 'parent-uri' => $item['parent-uri'],
1384                                                 'uid' => $item['uid']];
1385                                         $params = ['order' => ['id' => false]];
1386                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1387
1388                                         if (DBM::is_result($toplevel_parent)) {
1389                                                 $parent = $toplevel_parent;
1390                                         }
1391                                 }
1392
1393                                 $parent_id      = $parent['id'];
1394                                 $parent_deleted = $parent['deleted'];
1395                                 $allow_cid      = $parent['allow_cid'];
1396                                 $allow_gid      = $parent['allow_gid'];
1397                                 $deny_cid       = $parent['deny_cid'];
1398                                 $deny_gid       = $parent['deny_gid'];
1399                                 $item['wall']    = $parent['wall'];
1400                                 $notify_type    = 'comment-new';
1401
1402                                 /*
1403                                  * If the parent is private, force privacy for the entire conversation
1404                                  * This differs from the above settings as it subtly allows comments from
1405                                  * email correspondents to be private even if the overall thread is not.
1406                                  */
1407                                 if ($parent['private']) {
1408                                         $item['private'] = $parent['private'];
1409                                 }
1410
1411                                 /*
1412                                  * Edge case. We host a public forum that was originally posted to privately.
1413                                  * The original author commented, but as this is a comment, the permissions
1414                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1415                                  */
1416                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1417                                         $item['private'] = 0;
1418                                 }
1419
1420                                 // If its a post from myself then tag the thread as "mention"
1421                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1422                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1423                                 if (DBM::is_result($user)) {
1424                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1425                                         $self_id = Contact::getIdForURL($self, 0, true);
1426                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1427                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1428                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1429                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1430                                         }
1431                                 }
1432                         } else {
1433                                 /*
1434                                  * Allow one to see reply tweets from status.net even when
1435                                  * we don't have or can't see the original post.
1436                                  */
1437                                 if ($force_parent) {
1438                                         logger('$force_parent=true, reply converted to top-level post.');
1439                                         $parent_id = 0;
1440                                         $item['parent-uri'] = $item['uri'];
1441                                         $item['gravity'] = GRAVITY_PARENT;
1442                                 } else {
1443                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1444                                         return 0;
1445                                 }
1446
1447                                 $parent_deleted = 0;
1448                         }
1449                 }
1450
1451                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1452                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1453                 if (self::exists($condition)) {
1454                         logger('duplicated item with the same uri found. '.print_r($item,true));
1455                         return 0;
1456                 }
1457
1458                 // On Friendica and Diaspora the GUID is unique
1459                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1460                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1461                         if (self::exists($condition)) {
1462                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1463                                 return 0;
1464                         }
1465                 } else {
1466                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1467                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1468                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1469                         if (self::exists($condition)) {
1470                                 logger('duplicated item with the same body found. '.print_r($item,true));
1471                                 return 0;
1472                         }
1473                 }
1474
1475                 // Is this item available in the global items (with uid=0)?
1476                 if ($item["uid"] == 0) {
1477                         $item["global"] = true;
1478
1479                         // Set the global flag on all items if this was a global item entry
1480                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1481                 } else {
1482                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1483                 }
1484
1485                 // ACL settings
1486                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1487                         $private = 1;
1488                 } else {
1489                         $private = $item['private'];
1490                 }
1491
1492                 $item["allow_cid"] = $allow_cid;
1493                 $item["allow_gid"] = $allow_gid;
1494                 $item["deny_cid"] = $deny_cid;
1495                 $item["deny_gid"] = $deny_gid;
1496                 $item["private"] = $private;
1497                 $item["deleted"] = $parent_deleted;
1498
1499                 // Fill the cache field
1500                 put_item_in_cache($item);
1501
1502                 if ($notify) {
1503                         $item['edit'] = false;
1504                         $item['parent'] = $parent_id;
1505                         Addon::callHooks('post_local', $item);
1506                         unset($item['edit']);
1507                         unset($item['parent']);
1508                 } else {
1509                         Addon::callHooks('post_remote', $item);
1510                 }
1511
1512                 // This array field is used to trigger some automatic reactions
1513                 // It is mainly used in the "post_local" hook.
1514                 unset($item['api_source']);
1515
1516                 if (x($item, 'cancel')) {
1517                         logger('post cancelled by addon.');
1518                         return 0;
1519                 }
1520
1521                 /*
1522                  * Check for already added items.
1523                  * There is a timing issue here that sometimes creates double postings.
1524                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1525                  */
1526                 if ($item["uid"] == 0) {
1527                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1528                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1529                                 return 0;
1530                         }
1531                 }
1532
1533                 logger('' . print_r($item,true), LOGGER_DATA);
1534
1535                 if (array_key_exists('tag', $item)) {
1536                         $tags = $item['tag'];
1537                         unset($item['tag']);
1538                 } else {
1539                         $tags = '';
1540                 }
1541
1542                 if (array_key_exists('file', $item)) {
1543                         $files = $item['file'];
1544                         unset($item['file']);
1545                 } else {
1546                         $files = '';
1547                 }
1548
1549                 // We are doing this outside of the transaction to avoid timing problems
1550                 if (!self::insertActivity($item)) {
1551                         self::insertContent($item);
1552                 }
1553
1554                 dba::transaction();
1555                 $ret = dba::insert('item', $item);
1556
1557                 // When the item was successfully stored we fetch the ID of the item.
1558                 if (DBM::is_result($ret)) {
1559                         $current_post = dba::lastInsertId();
1560                 } else {
1561                         // This can happen - for example - if there are locking timeouts.
1562                         dba::rollback();
1563
1564                         // Store the data into a spool file so that we can try again later.
1565
1566                         // At first we restore the Diaspora signature that we removed above.
1567                         if (isset($encoded_signature)) {
1568                                 $item['dsprsig'] = $encoded_signature;
1569                         }
1570
1571                         // Now we store the data in the spool directory
1572                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1573                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1574
1575                         $spoolpath = get_spoolpath();
1576                         if ($spoolpath != "") {
1577                                 $spool = $spoolpath.'/'.$file;
1578                                 file_put_contents($spool, json_encode($item));
1579                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1580                         }
1581                         return 0;
1582                 }
1583
1584                 if ($current_post == 0) {
1585                         // This is one of these error messages that never should occur.
1586                         logger("couldn't find created item - we better quit now.");
1587                         dba::rollback();
1588                         return 0;
1589                 }
1590
1591                 // How much entries have we created?
1592                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1593                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1594
1595                 if ($entries > 1) {
1596                         // There are duplicates. We delete our just created entry.
1597                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1598
1599                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1600                         dba::delete('item', ['id' => $current_post]);
1601                         dba::commit();
1602                         return 0;
1603                 } elseif ($entries == 0) {
1604                         // This really should never happen since we quit earlier if there were problems.
1605                         logger("Something is terribly wrong. We haven't found our created entry.");
1606                         dba::rollback();
1607                         return 0;
1608                 }
1609
1610                 logger('created item '.$current_post);
1611                 self::updateContact($item);
1612
1613                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1614                         $parent_id = $current_post;
1615                 }
1616
1617                 // Set parent id
1618                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1619
1620                 $item['id'] = $current_post;
1621                 $item['parent'] = $parent_id;
1622
1623                 // update the commented timestamp on the parent
1624                 // Only update "commented" if it is really a comment
1625                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1626                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1627                 } else {
1628                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1629                 }
1630
1631                 if ($dsprsig) {
1632                         /*
1633                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1634                          * We can check for this condition when we decode and encode the stuff again.
1635                          */
1636                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1637                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1638                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1639                         }
1640
1641                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1642                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1643                 }
1644
1645                 if (!empty($diaspora_signed_text)) {
1646                         // Formerly we stored the signed text, the signature and the author in different fields.
1647                         // We now store the raw data so that we are more flexible.
1648                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1649                 }
1650
1651                 $deleted = self::tagDeliver($item['uid'], $current_post);
1652
1653                 /*
1654                  * current post can be deleted if is for a community page and no mention are
1655                  * in it.
1656                  */
1657                 if (!$deleted && !$dontcache) {
1658                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1659                         if (DBM::is_result($posted_item)) {
1660                                 if ($notify) {
1661                                         Addon::callHooks('post_local_end', $posted_item);
1662                                 } else {
1663                                         Addon::callHooks('post_remote_end', $posted_item);
1664                                 }
1665                         } else {
1666                                 logger('new item not found in DB, id ' . $current_post);
1667                         }
1668                 }
1669
1670                 if ($item['parent-uri'] === $item['uri']) {
1671                         self::addThread($current_post);
1672                 } else {
1673                         self::updateThread($parent_id);
1674                 }
1675
1676                 dba::commit();
1677
1678                 /*
1679                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1680                  * This is not perfect - but a workable solution until we found the reason for the problem.
1681                  */
1682                 if (!empty($tags)) {
1683                         Term::insertFromTagFieldByItemId($current_post, $tags);
1684                 }
1685
1686                 if (!empty($files)) {
1687                         Term::insertFromFileFieldByItemId($current_post, $files);
1688                 }
1689
1690                 if ($item['parent-uri'] === $item['uri']) {
1691                         self::addShadow($current_post);
1692                 } else {
1693                         self::addShadowPost($current_post);
1694                 }
1695
1696                 check_user_notification($current_post);
1697
1698                 if ($notify) {
1699                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1700                 } elseif (!empty($parent) && $parent['origin']) {
1701                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1702                 }
1703
1704                 return $current_post;
1705         }
1706
1707         /**
1708          * @brief Insert a new item content entry
1709          *
1710          * @param array $item The item fields that are to be inserted
1711          */
1712         private static function insertActivity(&$item)
1713         {
1714                 $activity_index = self::activityToIndex($item['verb']);
1715
1716                 if ($activity_index < 0) {
1717                         return false;
1718                 }
1719
1720                 $fields = ['uri' => $item['uri'], 'activity' => $activity_index,
1721                         'uri-hash' => hash('sha1', $item['uri']) . hash('ripemd160', $item['uri'])];
1722
1723                 $saved_item = $item;
1724
1725                 // We just remove everything that is content
1726                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1727                         unset($item[$field]);
1728                 }
1729
1730                 // To avoid timing problems, we are using locks.
1731                 $locked = Lock::acquire('item_insert_activity');
1732                 if (!$locked) {
1733                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1734                 }
1735
1736                 // Do we already have this content?
1737                 $item_activity = dba::selectFirst('item-activity', ['id'], ['uri' => $item['uri']]);
1738                 if (DBM::is_result($item_activity)) {
1739                         $item['iaid'] = $item_activity['id'];
1740                         logger('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1741                 } elseif (dba::insert('item-activity', $fields)) {
1742                         $item['iaid'] = dba::lastInsertId();
1743                         logger('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1744                 } else {
1745                         // This shouldn't happen. But if it does, we simply store it in the item-content table
1746                         logger('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
1747                         $item = $saved_item;
1748                         return false;
1749                 }
1750                 if ($locked) {
1751                         Lock::release('item_insert_activity');
1752                 }
1753                 return true;
1754         }
1755
1756         /**
1757          * @brief Insert a new item content entry
1758          *
1759          * @param array $item The item fields that are to be inserted
1760          */
1761         private static function insertContent(&$item)
1762         {
1763                 $fields = ['uri' => $item['uri'], 'plink' => $item['plink'],
1764                         'uri-plink-hash' => hash('sha1', $item['plink']).hash('sha1', $item['uri'])];
1765
1766                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1767                         if (isset($item[$field])) {
1768                                 $fields[$field] = $item[$field];
1769                                 unset($item[$field]);
1770                         }
1771                 }
1772
1773                 // To avoid timing problems, we are using locks.
1774                 $locked = Lock::acquire('item_insert_content');
1775                 if (!$locked) {
1776                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1777                 }
1778
1779                 // Do we already have this content?
1780                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $item['uri']]);
1781                 if (DBM::is_result($item_content)) {
1782                         $item['icid'] = $item_content['id'];
1783                         logger('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1784                 } elseif (dba::insert('item-content', $fields)) {
1785                         $item['icid'] = dba::lastInsertId();
1786                         logger('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1787                 } else {
1788                         // By setting the ICID value through the worker we should avoid timing problems.
1789                         // When the locking works, this shouldn't be needed. But better be prepared.
1790                         Worker::add(PRIORITY_HIGH, 'SetItemContentID', $item['uri']);
1791                         logger('Could not insert content for URI ' . $item['uri'] . ' - trying asynchronously');
1792                 }
1793                 if ($locked) {
1794                         Lock::release('item_insert_content');
1795                 }
1796         }
1797
1798         /**
1799          * @brief Set the item content id for a given URI
1800          *
1801          * @param string $uri The item URI
1802          */
1803         public static function setICIDforURI($uri)
1804         {
1805                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $uri]);
1806                 if (DBM::is_result($item_content)) {
1807                         dba::update('item', ['icid' => $item_content['id']], ['icid' => 0, 'uri' => $uri]);
1808                         logger('Asynchronously set item content id for URI ' . $uri . ' (' . $item_content['id'] . ') - Affected: '. (int)dba::affected_rows());
1809                 } else {
1810                         logger('No item-content found for URI ' . $uri);
1811                 }
1812         }
1813
1814         /**
1815          * @brief Update existing item content entries
1816          *
1817          * @param array $item The item fields that are to be changed
1818          * @param array $condition The condition for finding the item content entries
1819          */
1820         private static function updateActivity($item, $condition)
1821         {
1822                 if (empty($item['verb'])) {
1823                         return false;
1824                 }
1825                 $activity_index = self::activityToIndex($item['verb']);
1826
1827                 if ($activity_index < 0) {
1828                         return false;
1829                 }
1830
1831                 $fields = ['activity' => $activity_index,
1832                         'uri-hash' => hash('sha1', $condition['uri']) . hash('ripemd160', $condition['uri'])];
1833
1834                 logger('Update activity for URI ' . $condition['uri']);
1835
1836                 dba::update('item-activity', $fields, $condition, true);
1837
1838                 return true;
1839         }
1840
1841         /**
1842          * @brief Update existing item content entries
1843          *
1844          * @param array $item The item fields that are to be changed
1845          * @param array $condition The condition for finding the item content entries
1846          */
1847         private static function updateContent($item, $condition)
1848         {
1849                 // We have to select only the fields from the "item-content" table
1850                 $fields = [];
1851                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1852                         if (isset($item[$field])) {
1853                                 $fields[$field] = $item[$field];
1854                         }
1855                 }
1856
1857                 if (empty($fields)) {
1858                         // when there are no fields at all, just use the condition
1859                         // This is to ensure that we always store content.
1860                         $fields = $condition;
1861                 }
1862
1863                 if (!empty($item['plink'])) {
1864                         $fields['uri-plink-hash'] = hash('sha1', $item['plink']) . hash('sha1', $condition['uri']);
1865                 } else {
1866                         // Ensure that we don't delete the plink
1867                         unset($fields['plink']);
1868                 }
1869
1870                 logger('Update content for URI ' . $condition['uri']);
1871
1872                 dba::update('item-content', $fields, $condition, true);
1873         }
1874
1875         /**
1876          * @brief Distributes public items to the receivers
1877          *
1878          * @param integer $itemid      Item ID that should be added
1879          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1880          */
1881         public static function distribute($itemid, $signed_text = '')
1882         {
1883                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1884                 $parent = self::selectFirst(['owner-id'], $condition);
1885                 if (!DBM::is_result($parent)) {
1886                         return;
1887                 }
1888
1889                 // Only distribute public items from native networks
1890                 $condition = ['id' => $itemid, 'uid' => 0,
1891                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1892                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1893                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1894                 if (!DBM::is_result($item)) {
1895                         return;
1896                 }
1897
1898                 $origin = $item['origin'];
1899
1900                 unset($item['id']);
1901                 unset($item['parent']);
1902                 unset($item['mention']);
1903                 unset($item['wall']);
1904                 unset($item['origin']);
1905                 unset($item['starred']);
1906
1907                 $users = [];
1908
1909                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1910                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1911                 $contacts = dba::select('contact', ['uid'], $condition);
1912                 while ($contact = dba::fetch($contacts)) {
1913                         $users[$contact['uid']] = $contact['uid'];
1914                 }
1915
1916                 $origin_uid = 0;
1917
1918                 if ($item['uri'] != $item['parent-uri']) {
1919                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1920                         while ($parent = dba::fetch($parents)) {
1921                                 $users[$parent['uid']] = $parent['uid'];
1922                                 if ($parent['origin'] && !$origin) {
1923                                         $origin_uid = $parent['uid'];
1924                                 }
1925                         }
1926                 }
1927
1928                 foreach ($users as $uid) {
1929                         if ($origin_uid == $uid) {
1930                                 $item['diaspora_signed_text'] = $signed_text;
1931                         }
1932                         self::storeForUser($itemid, $item, $uid);
1933                 }
1934         }
1935
1936         /**
1937          * @brief Store public items for the receivers
1938          *
1939          * @param integer $itemid Item ID that should be added
1940          * @param array   $item   The item entry that will be stored
1941          * @param integer $uid    The user that will receive the item entry
1942          */
1943         private static function storeForUser($itemid, $item, $uid)
1944         {
1945                 $item['uid'] = $uid;
1946                 $item['origin'] = 0;
1947                 $item['wall'] = 0;
1948                 if ($item['uri'] == $item['parent-uri']) {
1949                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1950                 } else {
1951                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1952                 }
1953
1954                 if (empty($item['contact-id'])) {
1955                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1956                         if (!DBM::is_result($self)) {
1957                                 return;
1958                         }
1959                         $item['contact-id'] = $self['id'];
1960                 }
1961
1962                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1963                         $item['type'] = 'remote-comment';
1964                 } elseif ($item['type'] == 'wall') {
1965                         $item['type'] = 'remote';
1966                 }
1967
1968                 /// @todo Handling of "event-id"
1969
1970                 $notify = false;
1971                 if ($item['uri'] == $item['parent-uri']) {
1972                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1973                         if (DBM::is_result($contact)) {
1974                                 $notify = self::isRemoteSelf($contact, $item);
1975                         }
1976                 }
1977
1978                 $distributed = self::insert($item, false, $notify, true);
1979
1980                 if (!$distributed) {
1981                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1982                 } else {
1983                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1984                 }
1985         }
1986
1987         /**
1988          * @brief Add a shadow entry for a given item id that is a thread starter
1989          *
1990          * We store every public item entry additionally with the user id "0".
1991          * This is used for the community page and for the search.
1992          * It is planned that in the future we will store public item entries only once.
1993          *
1994          * @param integer $itemid Item ID that should be added
1995          */
1996         public static function addShadow($itemid)
1997         {
1998                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
1999                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2000                 $item = self::selectFirst($fields, $condition);
2001
2002                 if (!DBM::is_result($item)) {
2003                         return;
2004                 }
2005
2006                 // is it already a copy?
2007                 if (($itemid == 0) || ($item['uid'] == 0)) {
2008                         return;
2009                 }
2010
2011                 // Is it a visible public post?
2012                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2013                         return;
2014                 }
2015
2016                 // is it an entry from a connector? Only add an entry for natively connected networks
2017                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
2018                         return;
2019                 }
2020
2021                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2022                         return;
2023                 }
2024
2025                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2026
2027                 if (DBM::is_result($item)) {
2028                         // Preparing public shadow (removing user specific data)
2029                         $item['uid'] = 0;
2030                         unset($item['id']);
2031                         unset($item['parent']);
2032                         unset($item['wall']);
2033                         unset($item['mention']);
2034                         unset($item['origin']);
2035                         unset($item['starred']);
2036                         if ($item['uri'] == $item['parent-uri']) {
2037                                 $item['contact-id'] = $item['owner-id'];
2038                         } else {
2039                                 $item['contact-id'] = $item['author-id'];
2040                         }
2041
2042                         if (in_array($item['type'], ["net-comment", "wall-comment"])) {
2043                                 $item['type'] = 'remote-comment';
2044                         } elseif ($item['type'] == 'wall') {
2045                                 $item['type'] = 'remote';
2046                         }
2047
2048                         $public_shadow = self::insert($item, false, false, true);
2049
2050                         logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
2051                 }
2052         }
2053
2054         /**
2055          * @brief Add a shadow entry for a given item id that is a comment
2056          *
2057          * This function does the same like the function above - but for comments
2058          *
2059          * @param integer $itemid Item ID that should be added
2060          */
2061         public static function addShadowPost($itemid)
2062         {
2063                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2064                 if (!DBM::is_result($item)) {
2065                         return;
2066                 }
2067
2068                 // Is it a toplevel post?
2069                 if ($item['id'] == $item['parent']) {
2070                         self::addShadow($itemid);
2071                         return;
2072                 }
2073
2074                 // Is this a shadow entry?
2075                 if ($item['uid'] == 0) {
2076                         return;
2077                 }
2078
2079                 // Is there a shadow parent?
2080                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2081                         return;
2082                 }
2083
2084                 // Is there already a shadow entry?
2085                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2086                         return;
2087                 }
2088
2089                 // Save "origin" and "parent" state
2090                 $origin = $item['origin'];
2091                 $parent = $item['parent'];
2092
2093                 // Preparing public shadow (removing user specific data)
2094                 $item['uid'] = 0;
2095                 unset($item['id']);
2096                 unset($item['parent']);
2097                 unset($item['wall']);
2098                 unset($item['mention']);
2099                 unset($item['origin']);
2100                 unset($item['starred']);
2101                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2102
2103                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
2104                         $item['type'] = 'remote-comment';
2105                 } elseif ($item['type'] == 'wall') {
2106                         $item['type'] = 'remote';
2107                 }
2108
2109                 $public_shadow = self::insert($item, false, false, true);
2110
2111                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
2112
2113                 // If this was a comment to a Diaspora post we don't get our comment back.
2114                 // This means that we have to distribute the comment by ourselves.
2115                 if ($origin && self::exists(['id' => $parent, 'network' => NETWORK_DIASPORA])) {
2116                         self::distribute($public_shadow);
2117                 }
2118         }
2119
2120          /**
2121          * Adds a language specification in a "language" element of given $arr.
2122          * Expects "body" element to exist in $arr.
2123          */
2124         private static function addLanguageToItemArray(&$item)
2125         {
2126                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
2127
2128                 $ld = new Text_LanguageDetect();
2129                 $ld->setNameMode(2);
2130                 $languages = $ld->detect($naked_body, 3);
2131
2132                 if (is_array($languages)) {
2133                         $item['language'] = json_encode($languages);
2134                 }
2135         }
2136
2137         /**
2138          * @brief Creates an unique guid out of a given uri
2139          *
2140          * @param string $uri uri of an item entry
2141          * @param string $host hostname for the GUID prefix
2142          * @return string unique guid
2143          */
2144         public static function guidFromUri($uri, $host)
2145         {
2146                 // Our regular guid routine is using this kind of prefix as well
2147                 // We have to avoid that different routines could accidentally create the same value
2148                 $parsed = parse_url($uri);
2149
2150                 // We use a hash of the hostname as prefix for the guid
2151                 $guid_prefix = hash("crc32", $host);
2152
2153                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2154                 unset($parsed["scheme"]);
2155
2156                 // Glue it together to be able to make a hash from it
2157                 $host_id = implode("/", $parsed);
2158
2159                 // We could use any hash algorithm since it isn't a security issue
2160                 $host_hash = hash("ripemd128", $host_id);
2161
2162                 return $guid_prefix.$host_hash;
2163         }
2164
2165         /**
2166          * generate an unique URI
2167          *
2168          * @param integer $uid User id
2169          * @param string $guid An existing GUID (Otherwise it will be generated)
2170          *
2171          * @return string
2172          */
2173         public static function newURI($uid, $guid = "")
2174         {
2175                 if ($guid == "") {
2176                         $guid = System::createGUID(32);
2177                 }
2178
2179                 $hostname = self::getApp()->get_hostname();
2180
2181                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
2182
2183                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
2184
2185                 return $uri;
2186         }
2187
2188         /**
2189          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2190          *
2191          * This can be used to filter for inactive contacts.
2192          * Only do this for public postings to avoid privacy problems, since poco data is public.
2193          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2194          *
2195          * @param array $arr Contains the just posted item record
2196          */
2197         private static function updateContact($arr)
2198         {
2199                 // Unarchive the author
2200                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2201                 if (DBM::is_result($contact)) {
2202                         Contact::unmarkForArchival($contact);
2203                 }
2204
2205                 // Unarchive the contact if it's not our own contact
2206                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2207                 if (DBM::is_result($contact)) {
2208                         Contact::unmarkForArchival($contact);
2209                 }
2210
2211                 $update = (!$arr['private'] && ((defaults($arr, 'author-link', '') === defaults($arr, 'owner-link', '')) || ($arr["parent-uri"] === $arr["uri"])));
2212
2213                 // Is it a forum? Then we don't care about the rules from above
2214                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
2215                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2216                                 $update = true;
2217                         }
2218                 }
2219
2220                 if ($update) {
2221                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2222                                 ['id' => $arr['contact-id']]);
2223                 }
2224                 // Now do the same for the system wide contacts with uid=0
2225                 if (!$arr['private']) {
2226                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2227                                 ['id' => $arr['owner-id']]);
2228
2229                         if ($arr['owner-id'] != $arr['author-id']) {
2230                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2231                                         ['id' => $arr['author-id']]);
2232                         }
2233                 }
2234         }
2235
2236         public static function setHashtags(&$item)
2237         {
2238
2239                 $tags = get_tags($item["body"]);
2240
2241                 // No hashtags?
2242                 if (!count($tags)) {
2243                         return false;
2244                 }
2245
2246                 // This sorting is important when there are hashtags that are part of other hashtags
2247                 // Otherwise there could be problems with hashtags like #test and #test2
2248                 rsort($tags);
2249
2250                 $URLSearchString = "^\[\]";
2251
2252                 // All hashtags should point to the home server if "local_tags" is activated
2253                 if (Config::get('system', 'local_tags')) {
2254                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2255                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2256
2257                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2258                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2259                 }
2260
2261                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2262                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2263                         function ($match) {
2264                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2265                         }, $item["body"]);
2266
2267                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2268                         function ($match) {
2269                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2270                         }, $item["body"]);
2271
2272                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2273                         function ($match) {
2274                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2275                         }, $item["body"]);
2276
2277                 // Repair recursive urls
2278                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2279                                 "&num;$2", $item["body"]);
2280
2281                 foreach ($tags as $tag) {
2282                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
2283                                 continue;
2284                         }
2285
2286                         $basetag = str_replace('_',' ',substr($tag,1));
2287
2288                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
2289
2290                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2291
2292                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2293                                 if (strlen($item["tag"])) {
2294                                         $item["tag"] = ','.$item["tag"];
2295                                 }
2296                                 $item["tag"] = $newtag.$item["tag"];
2297                         }
2298                 }
2299
2300                 // Convert back the masked hashtags
2301                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2302         }
2303
2304         public static function getGuidById($id)
2305         {
2306                 $item = self::selectFirst(['guid'], ['id' => $id]);
2307                 if (DBM::is_result($item)) {
2308                         return $item['guid'];
2309                 } else {
2310                         return '';
2311                 }
2312         }
2313
2314         public static function getIdAndNickByGuid($guid, $uid = 0)
2315         {
2316                 $nick = "";
2317                 $id = 0;
2318
2319                 if ($uid == 0) {
2320                         $uid == local_user();
2321                 }
2322
2323                 // Does the given user have this item?
2324                 if ($uid) {
2325                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2326                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2327                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2328                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
2329                         if (DBM::is_result($item)) {
2330                                 $id = $item["id"];
2331                                 $nick = $item["nickname"];
2332                         }
2333                 }
2334
2335                 // Or is it anywhere on the server?
2336                 if ($nick == "") {
2337                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2338                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2339                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2340                                         AND NOT `item`.`private` AND `item`.`wall`
2341                                         AND `item`.`guid` = ?", $guid);
2342                         if (DBM::is_result($item)) {
2343                                 $id = $item["id"];
2344                                 $nick = $item["nickname"];
2345                         }
2346                 }
2347                 return ["nick" => $nick, "id" => $id];
2348         }
2349
2350         /**
2351          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2352          * @param int $uid
2353          * @param int $item_id
2354          * @return bool true if item was deleted, else false
2355          */
2356         private static function tagDeliver($uid, $item_id)
2357         {
2358                 $mention = false;
2359
2360                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
2361                 if (!DBM::is_result($user)) {
2362                         return;
2363                 }
2364
2365                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
2366                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
2367
2368                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2369                 if (!DBM::is_result($item)) {
2370                         return;
2371                 }
2372
2373                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
2374
2375                 /*
2376                  * Diaspora uses their own hardwired link URL in @-tags
2377                  * instead of the one we supply with webfinger
2378                  */
2379                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
2380
2381                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2382                 if ($cnt) {
2383                         foreach ($matches as $mtch) {
2384                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
2385                                         $mention = true;
2386                                         logger('mention found: ' . $mtch[2]);
2387                                 }
2388                         }
2389                 }
2390
2391                 if (!$mention) {
2392                         if (($community_page || $prvgroup) &&
2393                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2394                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2395                                 // delete it!
2396                                 logger("no-mention top-level post to community or private group. delete.");
2397                                 dba::delete('item', ['id' => $item_id]);
2398                                 return true;
2399                         }
2400                         return;
2401                 }
2402
2403                 $arr = ['item' => $item, 'user' => $user];
2404
2405                 Addon::callHooks('tagged', $arr);
2406
2407                 if (!$community_page && !$prvgroup) {
2408                         return;
2409                 }
2410
2411                 /*
2412                  * tgroup delivery - setup a second delivery chain
2413                  * prevent delivery looping - only proceed
2414                  * if the message originated elsewhere and is a top-level post
2415                  */
2416                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2417                         return;
2418                 }
2419
2420                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2421                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2422                 if (!DBM::is_result($self)) {
2423                         return;
2424                 }
2425
2426                 $owner_id = Contact::getIdForURL($self['url']);
2427
2428                 // also reset all the privacy bits to the forum default permissions
2429
2430                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2431
2432                 $forum_mode = ($prvgroup ? 2 : 1);
2433
2434                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2435                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
2436                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
2437                 dba::update('item', $fields, ['id' => $item_id]);
2438
2439                 self::updateThread($item_id);
2440
2441                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2442         }
2443
2444         public static function isRemoteSelf($contact, &$datarray)
2445         {
2446                 $a = get_app();
2447
2448                 if (!$contact['remote_self']) {
2449                         return false;
2450                 }
2451
2452                 // Prevent the forwarding of posts that are forwarded
2453                 if (!empty($datarray["extid"]) && ($datarray["extid"] == NETWORK_DFRN)) {
2454                         logger('Already forwarded', LOGGER_DEBUG);
2455                         return false;
2456                 }
2457
2458                 // Prevent to forward already forwarded posts
2459                 if ($datarray["app"] == $a->get_hostname()) {
2460                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2461                         return false;
2462                 }
2463
2464                 // Only forward posts
2465                 if ($datarray["verb"] != ACTIVITY_POST) {
2466                         logger('No post', LOGGER_DEBUG);
2467                         return false;
2468                 }
2469
2470                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2471                         logger('Not public', LOGGER_DEBUG);
2472                         return false;
2473                 }
2474
2475                 $datarray2 = $datarray;
2476                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2477                 if ($contact['remote_self'] == 2) {
2478                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2479                                         ['uid' => $contact['uid'], 'self' => true]);
2480                         if (DBM::is_result($self)) {
2481                                 $datarray['contact-id'] = $self["id"];
2482
2483                                 $datarray['owner-name'] = $self["name"];
2484                                 $datarray['owner-link'] = $self["url"];
2485                                 $datarray['owner-avatar'] = $self["thumb"];
2486
2487                                 $datarray['author-name']   = $datarray['owner-name'];
2488                                 $datarray['author-link']   = $datarray['owner-link'];
2489                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2490
2491                                 unset($datarray['created']);
2492                                 unset($datarray['edited']);
2493
2494                                 unset($datarray['network']);
2495                                 unset($datarray['owner-id']);
2496                                 unset($datarray['author-id']);
2497                         }
2498
2499                         if ($contact['network'] != NETWORK_FEED) {
2500                                 $datarray["guid"] = System::createGUID(32);
2501                                 unset($datarray["plink"]);
2502                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2503                                 $datarray["parent-uri"] = $datarray["uri"];
2504                                 $datarray["thr-parent"] = $datarray["uri"];
2505                                 $datarray["extid"] = NETWORK_DFRN;
2506                                 $urlpart = parse_url($datarray2['author-link']);
2507                                 $datarray["app"] = $urlpart["host"];
2508                         } else {
2509                                 $datarray['private'] = 0;
2510                         }
2511                 }
2512
2513                 if ($contact['network'] != NETWORK_FEED) {
2514                         // Store the original post
2515                         $result = self::insert($datarray2, false, false);
2516                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2517                 } else {
2518                         $datarray["app"] = "Feed";
2519                         $result = true;
2520                 }
2521
2522                 // Trigger automatic reactions for addons
2523                 $datarray['api_source'] = true;
2524
2525                 // We have to tell the hooks who we are - this really should be improved
2526                 $_SESSION["authenticated"] = true;
2527                 $_SESSION["uid"] = $contact['uid'];
2528
2529                 return $result;
2530         }
2531
2532         /**
2533          *
2534          * @param string $s
2535          * @param int    $uid
2536          * @param array  $item
2537          * @param int    $cid
2538          * @return string
2539          */
2540         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2541         {
2542                 if (Config::get('system', 'disable_embedded')) {
2543                         return $s;
2544                 }
2545
2546                 logger('check for photos', LOGGER_DEBUG);
2547                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2548
2549                 $orig_body = $s;
2550                 $new_body = '';
2551
2552                 $img_start = strpos($orig_body, '[img');
2553                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2554                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2555
2556                 while (($img_st_close !== false) && ($img_len !== false)) {
2557                         $img_st_close++; // make it point to AFTER the closing bracket
2558                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2559
2560                         logger('found photo ' . $image, LOGGER_DEBUG);
2561
2562                         if (stristr($image, $site . '/photo/')) {
2563                                 // Only embed locally hosted photos
2564                                 $replace = false;
2565                                 $i = basename($image);
2566                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2567                                 $x = strpos($i, '-');
2568
2569                                 if ($x) {
2570                                         $res = substr($i, $x + 1);
2571                                         $i = substr($i, 0, $x);
2572                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2573                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2574                                         if (DBM::is_result($photo)) {
2575                                                 /*
2576                                                  * Check to see if we should replace this photo link with an embedded image
2577                                                  * 1. No need to do so if the photo is public
2578                                                  * 2. If there's a contact-id provided, see if they're in the access list
2579                                                  *    for the photo. If so, embed it.
2580                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2581                                                  *    permissions, regardless of order but first check to see if they're an exact
2582                                                  *    match to save some processing overhead.
2583                                                  */
2584                                                 if (self::hasPermissions($photo)) {
2585                                                         if ($cid) {
2586                                                                 $recips = self::enumeratePermissions($photo);
2587                                                                 if (in_array($cid, $recips)) {
2588                                                                         $replace = true;
2589                                                                 }
2590                                                         } elseif ($item) {
2591                                                                 if (self::samePermissions($item, $photo)) {
2592                                                                         $replace = true;
2593                                                                 }
2594                                                         }
2595                                                 }
2596                                                 if ($replace) {
2597                                                         $data = $photo['data'];
2598                                                         $type = $photo['type'];
2599
2600                                                         // If a custom width and height were specified, apply before embedding
2601                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2602                                                                 logger('scaling photo', LOGGER_DEBUG);
2603
2604                                                                 $width = intval($match[1]);
2605                                                                 $height = intval($match[2]);
2606
2607                                                                 $Image = new Image($data, $type);
2608                                                                 if ($Image->isValid()) {
2609                                                                         $Image->scaleDown(max($width, $height));
2610                                                                         $data = $Image->asString();
2611                                                                         $type = $Image->getType();
2612                                                                 }
2613                                                         }
2614
2615                                                         logger('replacing photo', LOGGER_DEBUG);
2616                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2617                                                         logger('replaced: ' . $image, LOGGER_DATA);
2618                                                 }
2619                                         }
2620                                 }
2621                         }
2622
2623                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2624                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2625                         if ($orig_body === false) {
2626                                 $orig_body = '';
2627                         }
2628
2629                         $img_start = strpos($orig_body, '[img');
2630                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2631                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2632                 }
2633
2634                 $new_body = $new_body . $orig_body;
2635
2636                 return $new_body;
2637         }
2638
2639         private static function hasPermissions($obj)
2640         {
2641                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2642                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2643         }
2644
2645         private static function samePermissions($obj1, $obj2)
2646         {
2647                 // first part is easy. Check that these are exactly the same.
2648                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2649                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2650                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2651                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2652                         return true;
2653                 }
2654
2655                 // This is harder. Parse all the permissions and compare the resulting set.
2656                 $recipients1 = self::enumeratePermissions($obj1);
2657                 $recipients2 = self::enumeratePermissions($obj2);
2658                 sort($recipients1);
2659                 sort($recipients2);
2660
2661                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2662                 return ($recipients1 == $recipients2);
2663         }
2664
2665         // returns an array of contact-ids that are allowed to see this object
2666         private static function enumeratePermissions($obj)
2667         {
2668                 $allow_people = expand_acl($obj['allow_cid']);
2669                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2670                 $deny_people  = expand_acl($obj['deny_cid']);
2671                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2672                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2673                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2674                 $recipients   = array_diff($recipients, $deny);
2675                 return $recipients;
2676         }
2677
2678         public static function getFeedTags($item)
2679         {
2680                 $ret = [];
2681                 $matches = false;
2682                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2683                 if ($cnt) {
2684                         for ($x = 0; $x < $cnt; $x ++) {
2685                                 if ($matches[1][$x]) {
2686                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2687                                 }
2688                         }
2689                 }
2690                 $matches = false;
2691                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2692                 if ($cnt) {
2693                         for ($x = 0; $x < $cnt; $x ++) {
2694                                 if ($matches[1][$x]) {
2695                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2696                                 }
2697                         }
2698                 }
2699                 return $ret;
2700         }
2701
2702         public static function expire($uid, $days, $network = "", $force = false)
2703         {
2704                 if (!$uid || ($days < 1)) {
2705                         return;
2706                 }
2707
2708                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2709                         $uid, GRAVITY_PARENT];
2710
2711                 /*
2712                  * $expire_network_only = save your own wall posts
2713                  * and just expire conversations started by others
2714                  */
2715                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
2716
2717                 if ($expire_network_only) {
2718                         $condition[0] .= " AND NOT `wall`";
2719                 }
2720
2721                 if ($network != "") {
2722                         $condition[0] .= " AND `network` = ?";
2723                         $condition[] = $network;
2724
2725                         /*
2726                          * There is an index "uid_network_received" but not "uid_network_created"
2727                          * This avoids the creation of another index just for one purpose.
2728                          * And it doesn't really matter wether to look at "received" or "created"
2729                          */
2730                         $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2731                         $condition[] = $days;
2732                 } else {
2733                         $condition[0] .= " AND `created` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2734                         $condition[] = $days;
2735                 }
2736
2737                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id'], $condition);
2738
2739                 if (!DBM::is_result($items)) {
2740                         return;
2741                 }
2742
2743                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
2744
2745                 // Forcing expiring of items - but not notes and marked items
2746                 if ($force) {
2747                         $expire_items = true;
2748                 }
2749
2750                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
2751                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
2752                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
2753
2754                 $expired = 0;
2755
2756                 while ($item = Item::fetch($items)) {
2757                         // don't expire filed items
2758
2759                         if (strpos($item['file'], '[') !== false) {
2760                                 continue;
2761                         }
2762
2763                         // Only expire posts, not photos and photo comments
2764
2765                         if (!$expire_photos && strlen($item['resource-id'])) {
2766                                 continue;
2767                         } elseif (!$expire_starred && intval($item['starred'])) {
2768                                 continue;
2769                         } elseif (!$expire_notes && $item['type'] == 'note') {
2770                                 continue;
2771                         } elseif (!$expire_items && $item['type'] != 'note') {
2772                                 continue;
2773                         }
2774
2775                         self::deleteById($item['id'], PRIORITY_LOW);
2776
2777                         ++$expired;
2778                 }
2779                 dba::close($items);
2780                 logger('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2781         }
2782
2783         public static function firstPostDate($uid, $wall = false)
2784         {
2785                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2786                 $params = ['order' => ['created' => false]];
2787                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2788                 if (DBM::is_result($thread)) {
2789                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2790                 }
2791                 return false;
2792         }
2793
2794         /**
2795          * @brief add/remove activity to an item
2796          *
2797          * Toggle activities as like,dislike,attend of an item
2798          *
2799          * @param string $item_id
2800          * @param string $verb
2801          *              Activity verb. One of
2802          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2803          *                      attendno, unattendno, attendmaybe, unattendmaybe
2804          * @hook 'post_local_end'
2805          *              array $arr
2806          *                      'post_id' => ID of posted item
2807          */
2808         public static function performLike($item_id, $verb)
2809         {
2810                 if (!local_user() && !remote_user()) {
2811                         return false;
2812                 }
2813
2814                 switch ($verb) {
2815                         case 'like':
2816                         case 'unlike':
2817                                 $activity = ACTIVITY_LIKE;
2818                                 break;
2819                         case 'dislike':
2820                         case 'undislike':
2821                                 $activity = ACTIVITY_DISLIKE;
2822                                 break;
2823                         case 'attendyes':
2824                         case 'unattendyes':
2825                                 $activity = ACTIVITY_ATTEND;
2826                                 break;
2827                         case 'attendno':
2828                         case 'unattendno':
2829                                 $activity = ACTIVITY_ATTENDNO;
2830                                 break;
2831                         case 'attendmaybe':
2832                         case 'unattendmaybe':
2833                                 $activity = ACTIVITY_ATTENDMAYBE;
2834                                 break;
2835                         default:
2836                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2837                                 return false;
2838                 }
2839
2840                 // Enable activity toggling instead of on/off
2841                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2842
2843                 logger('like: verb ' . $verb . ' item ' . $item_id);
2844
2845                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2846                 if (!DBM::is_result($item)) {
2847                         logger('like: unknown item ' . $item_id);
2848                         return false;
2849                 }
2850
2851                 $item_uri = $item['uri'];
2852
2853                 $uid = $item['uid'];
2854                 if (($uid == 0) && local_user()) {
2855                         $uid = local_user();
2856                 }
2857
2858                 if (!can_write_wall($uid)) {
2859                         logger('like: unable to write on wall ' . $uid);
2860                         return false;
2861                 }
2862
2863                 // Retrieves the local post owner
2864                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2865                 if (!DBM::is_result($owner_self_contact)) {
2866                         logger('like: unknown owner ' . $uid);
2867                         return false;
2868                 }
2869
2870                 // Retrieve the current logged in user's public contact
2871                 $author_id = public_contact();
2872
2873                 $author_contact = dba::selectFirst('contact', ['url'], ['id' => $author_id]);
2874                 if (!DBM::is_result($author_contact)) {
2875                         logger('like: unknown author ' . $author_id);
2876                         return false;
2877                 }
2878
2879                 // Contact-id is the uid-dependant author contact
2880                 if (local_user() == $uid) {
2881                         $item_contact_id = $owner_self_contact['id'];
2882                         $item_contact = $owner_self_contact;
2883                 } else {
2884                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2885                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2886                         if (!DBM::is_result($item_contact)) {
2887                                 logger('like: unknown item contact ' . $item_contact_id);
2888                                 return false;
2889                         }
2890                 }
2891
2892                 // Look for an existing verb row
2893                 // event participation are essentially radio toggles. If you make a subsequent choice,
2894                 // we need to eradicate your first choice.
2895                 if ($event_verb_flag) {
2896                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
2897
2898                         // Translate to the index based activity index
2899                         $activities = [];
2900                         foreach ($verbs as $verb) {
2901                                 $activities[] = self::activityToIndex($verb);
2902                         }
2903                 } else {
2904                         $activities = self::activityToIndex($activity);
2905                 }
2906
2907                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2908                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
2909
2910                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2911
2912                 // If it exists, mark it as deleted
2913                 if (DBM::is_result($like_item)) {
2914                         // Already voted, undo it
2915                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2916                         /// @todo Consider using self::update - but before doing so, check the side effects
2917                         dba::update('item', $fields, ['id' => $like_item['id']]);
2918
2919                         // Clean up the Diaspora signatures for this like
2920                         dba::delete('sign', ['iid' => $like_item['id']]);
2921
2922                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item['id']);
2923
2924                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2925                                 return true;
2926                         }
2927                 }
2928
2929                 // Verb is "un-something", just trying to delete existing entries
2930                 if (strpos($verb, 'un') === 0) {
2931                         return true;
2932                 }
2933
2934                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2935
2936                 $new_item = [
2937                         'guid'          => System::createGUID(32),
2938                         'uri'           => self::newURI($item['uid']),
2939                         'uid'           => $item['uid'],
2940                         'contact-id'    => $item_contact_id,
2941                         'type'          => 'activity',
2942                         'wall'          => $item['wall'],
2943                         'origin'        => 1,
2944                         'network'       => NETWORK_DFRN,
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 }