src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Content\Text;
  11 use Friendica\Core\Addon;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\PConfig;
  15 use Friendica\Core\System;
  16 use Friendica\Core\Worker;
  17 use Friendica\Database\DBM;
  18 use Friendica\Model\Contact;
  19 use Friendica\Model\Conversation;
  20 use Friendica\Model\Group;
  21 use Friendica\Model\Term;
  22 use Friendica\Object\Image;
  23 use Friendica\Protocol\Diaspora;
  24 use Friendica\Protocol\OStatus;
  25 use Friendica\Util\DateTimeFormat;
  26 use Friendica\Util\XML;
  27 use Friendica\Util\Lock;
  28 use dba;
  29 use Text_LanguageDetect;
  30
  31 require_once 'boot.php';
  32 require_once 'include/items.php';
  33 require_once 'include/text.php';
  34
  35 class Item extends BaseObject
  36 {
  37         // Field list that is used to display the items
  38         const DISPLAY_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network',
  39                         'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  40                         'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  41                         'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  42                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  43                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  44                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  45                         'contact-id', 'contact-link', 'contact-name', 'contact-avatar',
  46                         'writable', 'self', 'cid', 'alias',
  47                         'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  48                         'event-summary', 'event-desc', 'event-location', 'event-type',
  49                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
  50
  51         // Field list that is used to deliver items via the protocols
  52         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  53                         'created', 'edited', 'verb', 'object-type', 'object', 'target',
  54                         'private', 'title', 'body', 'location', 'coord', 'app',
  55                         'attach', 'tag', 'bookmark', 'deleted', 'extid',
  56                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  57                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  58                         'signed_text', 'signature', 'signer'];
  59
  60         // Field list for "item-content" table that is mixed with the item table
  61         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  62                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  63                         'object-type', 'object', 'target-type', 'target', 'plink'];
  64
  65         // Field list for "item-content" table that is not present in the "item" table
  66         const CONTENT_FIELDLIST = ['language'];
  67
  68         // All fields in the item table
  69         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  70                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid',
  71                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  72                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  73                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  74                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  75                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  76                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  77                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  78                         'author-id', 'author-link', 'author-name', 'author-avatar',
  79                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  80
  81         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  82         // The item-activity table only stores the index and needs this array to know the matching activity.
  83         const ACTIVITIES = [ACTIVITY_LIKE, ACTIVITY_DISLIKE, ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
  84
  85         /**
  86          * @brief returns an activity index from an activity string
  87          *
  88          * @param string $activity activity string
  89          * @return integer Activity index
  90          */
  91         private static function activityToIndex($activity)
  92         {
  93                 $index = array_search($activity, self::ACTIVITIES);
  94
  95                 if (is_bool($index)) {
  96                         $index = -1;
  97                 }
  98
  99                 return $index;
 100         }
 101
 102         /**
 103          * @brief returns an activity string from an activity index
 104          *
 105          * @param integer $index activity index
 106          * @return string Activity string
 107          */
 108         private static function indexToActivity($index)
 109         {
 110                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 111                         return '';
 112                 }
 113
 114                 return self::ACTIVITIES[$index];
 115         }
 116
 117         /**
 118          * @brief Fetch a single item row
 119          *
 120          * @param mixed $stmt statement object
 121          * @return array current row
 122          */
 123         public static function fetch($stmt)
 124         {
 125                 $row = dba::fetch($stmt);
 126
 127                 if (is_bool($row)) {
 128                         return $row;
 129                 }
 130
 131                 // ---------------------- Transform item structure data ----------------------
 132
 133                 // We prefer the data from the user's contact over the public one
 134                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 135                         ($row['author-link'] == $row['contact-link'])) {
 136                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 137                                 $row['author-avatar'] = $row['contact-avatar'];
 138                         }
 139                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 140                                 $row['author-name'] = $row['contact-name'];
 141                         }
 142                 }
 143
 144                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 145                         ($row['owner-link'] == $row['contact-link'])) {
 146                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 147                                 $row['owner-avatar'] = $row['contact-avatar'];
 148                         }
 149                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 150                                 $row['owner-name'] = $row['contact-name'];
 151                         }
 152                 }
 153
 154                 // We can always comment on posts from these networks
 155                 if (array_key_exists('writable', $row) &&
 156                         in_array($row['internal-network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
 157                         $row['writable'] = true;
 158                 }
 159
 160                 // ---------------------- Transform item content data ----------------------
 161
 162                 // Fetch data from the item-content table whenever there is content there
 163                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 164                         if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 165                                 $row[$field] = $row['internal-item-' . $field];
 166                         }
 167                         unset($row['internal-item-' . $field]);
 168                 }
 169
 170                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 171                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 172                         if (array_key_exists('title', $row)) {
 173                                 $row['title'] = '';
 174                         }
 175                         if (array_key_exists('body', $row)) {
 176                                 $row['body'] = $row['verb'];
 177                         }
 178                         if (array_key_exists('object', $row)) {
 179                                 $row['object'] = '';
 180                         }
 181                         if (array_key_exists('object-type', $row)) {
 182                                 $row['object-type'] = ACTIVITY_OBJ_NOTE;
 183                         }
 184                 } elseif (in_array($row['verb'], ['', ACTIVITY_POST, ACTIVITY_SHARE])) {
 185                         // Posts don't have an object or target - but having tags or files.
 186                         // We safe some performance by building tag and file strings only here.
 187                         // We remove object and target since they aren't used for this type.
 188                         if (array_key_exists('object', $row)) {
 189                                 $row['object'] = '';
 190                         }
 191                         if (array_key_exists('target', $row)) {
 192                                 $row['target'] = '';
 193                         }
 194                         // Build the tag string out of the term entries
 195                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 196                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 197                         }
 198
 199                         // Build the file string out of the term entries
 200                         if (array_key_exists('file', $row) && empty($row['file'])) {
 201                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 202                         }
 203                 }
 204
 205                 // Remove internal fields
 206                 unset($row['internal-activity']);
 207                 unset($row['internal-network']);
 208                 unset($row['internal-iid']);
 209                 unset($row['internal-iaid']);
 210                 unset($row['internal-icid']);
 211
 212                 return $row;
 213         }
 214
 215         /**
 216          * @brief Fills an array with data from an item query
 217          *
 218          * @param object $stmt statement object
 219          * @return array Data array
 220          */
 221         public static function inArray($stmt, $do_close = true) {
 222                 if (is_bool($stmt)) {
 223                         return $stmt;
 224                 }
 225
 226                 $data = [];
 227                 while ($row = self::fetch($stmt)) {
 228                         $data[] = $row;
 229                 }
 230                 if ($do_close) {
 231                         dba::close($stmt);
 232                 }
 233                 return $data;
 234         }
 235
 236         /**
 237          * @brief Check if item data exists
 238          *
 239          * @param array $condition array of fields for condition
 240          *
 241          * @return boolean Are there rows for that condition?
 242          */
 243         public static function exists($condition) {
 244                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 245
 246                 if (is_bool($stmt)) {
 247                         $retval = $stmt;
 248                 } else {
 249                         $retval = (dba::num_rows($stmt) > 0);
 250                 }
 251
 252                 dba::close($stmt);
 253
 254                 return $retval;
 255         }
 256
 257         /**
 258          * Retrieve a single record from the item table for a given user and returns it in an associative array
 259          *
 260          * @brief Retrieve a single record from a table
 261          * @param integer $uid User ID
 262          * @param array  $fields
 263          * @param array  $condition
 264          * @param array  $params
 265          * @return bool|array
 266          * @see dba::select
 267          */
 268         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 269         {
 270                 $params['uid'] = $uid;
 271
 272                 if (empty($selected)) {
 273                         $selected = Item::DISPLAY_FIELDLIST;
 274                 }
 275
 276                 return self::selectFirst($selected, $condition, $params);
 277         }
 278
 279         /**
 280          * @brief Select rows from the item table for a given user
 281          *
 282          * @param integer $uid User ID
 283          * @param array  $selected  Array of selected fields, empty for all
 284          * @param array  $condition Array of fields for condition
 285          * @param array  $params    Array of several parameters
 286          *
 287          * @return boolean|object
 288          */
 289         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 290         {
 291                 $params['uid'] = $uid;
 292
 293                 if (empty($selected)) {
 294                         $selected = Item::DISPLAY_FIELDLIST;
 295                 }
 296
 297                 return self::select($selected, $condition, $params);
 298         }
 299
 300         /**
 301          * Retrieve a single record from the item table and returns it in an associative array
 302          *
 303          * @brief Retrieve a single record from a table
 304          * @param array  $fields
 305          * @param array  $condition
 306          * @param array  $params
 307          * @return bool|array
 308          * @see dba::select
 309          */
 310         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 311         {
 312                 $params['limit'] = 1;
 313
 314                 $result = self::select($fields, $condition, $params);
 315
 316                 if (is_bool($result)) {
 317                         return $result;
 318                 } else {
 319                         $row = self::fetch($result);
 320                         dba::close($result);
 321                         return $row;
 322                 }
 323         }
 324
 325         /**
 326          * @brief Select rows from the item table
 327          *
 328          * @param array  $selected  Array of selected fields, empty for all
 329          * @param array  $condition Array of fields for condition
 330          * @param array  $params    Array of several parameters
 331          *
 332          * @return boolean|object
 333          */
 334         public static function select(array $selected = [], array $condition = [], $params = [])
 335         {
 336                 $uid = 0;
 337                 $usermode = false;
 338
 339                 if (isset($params['uid'])) {
 340                         $uid = $params['uid'];
 341                         $usermode = true;
 342                 }
 343
 344                 $fields = self::fieldlist($selected);
 345
 346                 $select_fields = self::constructSelectFields($fields, $selected);
 347
 348                 $condition_string = dba::buildCondition($condition);
 349
 350                 $condition_string = self::addTablesToFields($condition_string, $fields);
 351
 352                 if ($usermode) {
 353                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 354                 }
 355
 356                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 357
 358                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 359
 360                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 361
 362                 return dba::p($sql, $condition);
 363         }
 364
 365         /**
 366          * @brief Select rows from the starting post in the item table
 367          *
 368          * @param integer $uid User ID
 369          * @param array  $fields    Array of selected fields, empty for all
 370          * @param array  $condition Array of fields for condition
 371          * @param array  $params    Array of several parameters
 372          *
 373          * @return boolean|object
 374          */
 375         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 376         {
 377                 $params['uid'] = $uid;
 378
 379                 if (empty($selected)) {
 380                         $selected = Item::DISPLAY_FIELDLIST;
 381                 }
 382
 383                 return self::selectThread($selected, $condition, $params);
 384         }
 385
 386         /**
 387          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 388          *
 389          * @brief Retrieve a single record from a table
 390          * @param integer $uid User ID
 391          * @param array  $selected
 392          * @param array  $condition
 393          * @param array  $params
 394          * @return bool|array
 395          * @see dba::select
 396          */
 397         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 398         {
 399                 $params['uid'] = $uid;
 400
 401                 if (empty($selected)) {
 402                         $selected = Item::DISPLAY_FIELDLIST;
 403                 }
 404
 405                 return self::selectFirstThread($selected, $condition, $params);
 406         }
 407
 408         /**
 409          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 410          *
 411          * @brief Retrieve a single record from a table
 412          * @param array  $fields
 413          * @param array  $condition
 414          * @param array  $params
 415          * @return bool|array
 416          * @see dba::select
 417          */
 418         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 419         {
 420                 $params['limit'] = 1;
 421                 $result = self::selectThread($fields, $condition, $params);
 422
 423                 if (is_bool($result)) {
 424                         return $result;
 425                 } else {
 426                         $row = self::fetch($result);
 427                         dba::close($result);
 428                         return $row;
 429                 }
 430         }
 431
 432         /**
 433          * @brief Select rows from the starting post in the item table
 434          *
 435          * @param array  $selected  Array of selected fields, empty for all
 436          * @param array  $condition Array of fields for condition
 437          * @param array  $params    Array of several parameters
 438          *
 439          * @return boolean|object
 440          */
 441         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 442         {
 443                 $uid = 0;
 444                 $usermode = false;
 445
 446                 if (isset($params['uid'])) {
 447                         $uid = $params['uid'];
 448                         $usermode = true;
 449                 }
 450
 451                 $fields = self::fieldlist($selected);
 452
 453                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 454                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 455                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 456                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 457
 458                 $select_fields = self::constructSelectFields($fields, $selected);
 459
 460                 $condition_string = dba::buildCondition($condition);
 461
 462                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 463                 $condition_string = self::addTablesToFields($condition_string, $fields);
 464
 465                 if ($usermode) {
 466                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 467                 }
 468
 469                 $param_string = dba::buildParameter($params);
 470                 $param_string = self::addTablesToFields($param_string, $threadfields);
 471                 $param_string = self::addTablesToFields($param_string, $fields);
 472
 473                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 474
 475                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 476
 477                 return dba::p($sql, $condition);
 478         }
 479
 480         /**
 481          * @brief Returns a list of fields that are associated with the item table
 482          *
 483          * @return array field list
 484          */
 485         private static function fieldlist($selected)
 486         {
 487                 $fields = [];
 488
 489                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 490                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 491                         'created', 'edited', 'commented', 'received', 'changed', 'postopts',
 492                         'resource-id', 'event-id', 'tag', 'attach', 'inform',
 493                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 494                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 495                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 496                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 497                         'network' => 'internal-network', 'icid' => 'internal-icid',
 498                         'iaid' => 'internal-iaid'];
 499
 500                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 501
 502                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 503
 504                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 505                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 506
 507                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 508                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 509
 510                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 511                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 512                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 513
 514                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 515
 516                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 517
 518                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 519                         'start' => 'event-start','finish' => 'event-finish',
 520                         'summary' => 'event-summary','desc' => 'event-desc',
 521                         'location' => 'event-location', 'type' => 'event-type',
 522                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 523                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 524
 525                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 526
 527                 return $fields;
 528         }
 529
 530         /**
 531          * @brief Returns SQL condition for the "select" functions
 532          *
 533          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 534          *
 535          * @return string SQL condition
 536          */
 537         private static function condition($thread_mode)
 538         {
 539                 if ($thread_mode) {
 540                         $master_table = "`thread`";
 541                 } else {
 542                         $master_table = "`item`";
 543                 }
 544                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 545         }
 546
 547         /**
 548          * @brief Returns all needed "JOIN" commands for the "select" functions
 549          *
 550          * @param integer $uid User ID
 551          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 552          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 553          *
 554          * @return string The SQL joins for the "select" functions
 555          */
 556         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 557         {
 558                 if ($thread_mode) {
 559                         $master_table = "`thread`";
 560                         $master_table_key = "`thread`.`iid`";
 561                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 562                 } else {
 563                         $master_table = "`item`";
 564                         $master_table_key = "`item`.`id`";
 565                         $joins = '';
 566                 }
 567
 568                 if ($user_mode) {
 569                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 570                                 AND NOT `contact`.`blocked`
 571                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 572                                 OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 573                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 574                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 575                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 576                                 CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 577                 } else {
 578                         if (strpos($sql_commands, "`contact`.") !== false) {
 579                                 $joins .= "STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 580                         }
 581                         if (strpos($sql_commands, "`author`.") !== false) {
 582                                 $joins .= " STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 583                         }
 584                         if (strpos($sql_commands, "`owner`.") !== false) {
 585                                 $joins .= " STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 586                         }
 587                 }
 588
 589                 if (strpos($sql_commands, "`group_member`.") !== false) {
 590                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 591                 }
 592
 593                 if (strpos($sql_commands, "`user`.") !== false) {
 594                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 595                 }
 596
 597                 if (strpos($sql_commands, "`event`.") !== false) {
 598                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 599                 }
 600
 601                 if (strpos($sql_commands, "`sign`.") !== false) {
 602                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 603                 }
 604
 605                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 606                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`id` = `item`.`iaid`";
 607                 }
 608
 609                 if (strpos($sql_commands, "`item-content`.") !== false) {
 610                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
 611                 }
 612
 613                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 614                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 615                 }
 616
 617                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 618                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 619                 }
 620
 621                 return $joins;
 622         }
 623
 624         /**
 625          * @brief Add the field list for the "select" functions
 626          *
 627          * @param array $fields The field definition array
 628          * @param array $selected The array with the selected fields from the "select" functions
 629          *
 630          * @return string The field list
 631          */
 632         private static function constructSelectFields($fields, $selected)
 633         {
 634                 if (!empty($selected)) {
 635                         $selected[] = 'internal-iid';
 636                         $selected[] = 'internal-iaid';
 637                         $selected[] = 'internal-icid';
 638                         $selected[] = 'internal-network';
 639                 }
 640
 641                 if (in_array('verb', $selected)) {
 642                         $selected[] = 'internal-activity';
 643                 }
 644
 645                 $selection = [];
 646                 foreach ($fields as $table => $table_fields) {
 647                         foreach ($table_fields as $field => $select) {
 648                                 if (empty($selected) || in_array($select, $selected)) {
 649                                         if (in_array($select, self::MIXED_CONTENT_FIELDLIST)) {
 650                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 651                                         }
 652                                         if (is_int($field)) {
 653                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 654                                         } else {
 655                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 656                                         }
 657                                 }
 658                         }
 659                 }
 660                 return implode(", ", $selection);
 661         }
 662
 663         /**
 664          * @brief add table definition to fields in an SQL query
 665          *
 666          * @param string $query SQL query
 667          * @param array $fields The field definition array
 668          *
 669          * @return string the changed SQL query
 670          */
 671         private static function addTablesToFields($query, $fields)
 672         {
 673                 foreach ($fields as $table => $table_fields) {
 674                         foreach ($table_fields as $alias => $field) {
 675                                 if (is_int($alias)) {
 676                                         $replace_field = $field;
 677                                 } else {
 678                                         $replace_field = $alias;
 679                                 }
 680
 681                                 $search = "/([^\.])`" . $field . "`/i";
 682                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 683                                 $query = preg_replace($search, $replace, $query);
 684                         }
 685                 }
 686                 return $query;
 687         }
 688
 689         /**
 690          * @brief Update existing item entries
 691          *
 692          * @param array $fields The fields that are to be changed
 693          * @param array $condition The condition for finding the item entries
 694          *
 695          * In the future we may have to change permissions as well.
 696          * Then we had to add the user id as third parameter.
 697          *
 698          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 699          *
 700          * @return integer|boolean number of affected rows - or "false" if there was an error
 701          */
 702         public static function update(array $fields, array $condition)
 703         {
 704                 if (empty($condition) || empty($fields)) {
 705                         return false;
 706                 }
 707
 708                 // To ensure the data integrity we do it in an transaction
 709                 dba::transaction();
 710
 711                 // We cannot simply expand the condition to check for origin entries
 712                 // The condition needn't to be a simple array but could be a complex condition.
 713                 // And we have to execute this query before the update to ensure to fetch the same data.
 714                 $items = dba::select('item', ['id', 'origin', 'uri', 'plink', 'iaid', 'icid', 'tag', 'file'], $condition);
 715
 716                 $content_fields = [];
 717                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 718                         if (isset($fields[$field])) {
 719                                 $content_fields[$field] = $fields[$field];
 720                                 if (in_array($field, self::CONTENT_FIELDLIST)) {
 721                                         unset($fields[$field]);
 722                                 } else {
 723                                         $fields[$field] = null;
 724                                 }
 725                         }
 726                 }
 727
 728                 $author_owner_fields = ['author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link'];
 729                 foreach ($author_owner_fields as $field) {
 730                         if (isset($fields[$field])) {
 731                                 $fields[$field] = null;
 732                         }
 733                 }
 734
 735                 if (array_key_exists('tag', $fields)) {
 736                         $tags = $fields['tag'];
 737                         unset($fields['tag']);
 738                 } else {
 739                         $tags = '';
 740                 }
 741
 742                 if (array_key_exists('file', $fields)) {
 743                         $files = $fields['file'];
 744                         unset($fields['file']);
 745                 } else {
 746                         $files = '';
 747                 }
 748
 749                 if (!empty($fields)) {
 750                         $success = dba::update('item', $fields, $condition);
 751
 752                         if (!$success) {
 753                                 dba::close($items);
 754                                 dba::rollback();
 755                                 return false;
 756                         }
 757                 }
 758
 759                 // When there is no content for the "old" item table, this will count the fetched items
 760                 $rows = dba::affected_rows();
 761
 762                 while ($item = dba::fetch($items)) {
 763                         if (!empty($item['plink'])) {
 764                                 $content_fields['plink'] = $item['plink'];
 765                         }
 766                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 767                                 self::updateActivity($content_fields, ['uri' => $item['uri']]);
 768
 769                                 if (empty($item['iaid'])) {
 770                                         $item_activity = dba::selectFirst('item-activity', ['id'], ['uri' => $item['uri']]);
 771                                         if (DBM::is_result($item_activity)) {
 772                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 773                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 774                                                         $item_fields[$field] = '';
 775                                                 }
 776                                                 dba::update('item', $item_fields, ['id' => $item['id']]);
 777
 778                                                 if (!empty($item['icid']) && !dba::exists('item', ['icid' => $item['icid']])) {
 779                                                         dba::delete('item-content', ['id' => $item['icid']]);
 780                                                 }
 781                                         }
 782                                 } elseif (!empty($item['icid'])) {
 783                                         dba::update('item', ['icid' => null], ['id' => $item['id']]);
 784
 785                                         if (!dba::exists('item', ['icid' => $item['icid']])) {
 786                                                 dba::delete('item-content', ['id' => $item['icid']]);
 787                                         }
 788                                 }
 789                         } else {
 790                                 self::updateContent($content_fields, ['uri' => $item['uri']]);
 791
 792                                 if (empty($item['icid'])) {
 793                                         $item_content = dba::selectFirst('item-content', [], ['uri' => $item['uri']]);
 794                                         if (DBM::is_result($item_content)) {
 795                                                 $item_fields = ['icid' => $item_content['id']];
 796                                                 // Clear all fields in the item table that have a content in the item-content table
 797                                                 foreach ($item_content as $field => $content) {
 798                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
 799                                                                 $item_fields[$field] = '';
 800                                                         }
 801                                                 }
 802                                                 dba::update('item', $item_fields, ['id' => $item['id']]);
 803                                         }
 804                                 }
 805                         }
 806
 807                         if (!empty($tags)) {
 808                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
 809                                 if (!empty($item['tag'])) {
 810                                         dba::update('item', ['tag' => ''], ['id' => $item['id']]);
 811                                 }
 812                         }
 813
 814                         if (!empty($files)) {
 815                                 Term::insertFromFileFieldByItemId($item['id'], $files);
 816                                 if (!empty($item['file'])) {
 817                                         dba::update('item', ['file' => ''], ['id' => $item['id']]);
 818                                 }
 819                         }
 820
 821                         self::updateThread($item['id']);
 822
 823                         // We only need to notfiy others when it is an original entry from us.
 824                         // Only call the notifier when the item has some content relevant change.
 825                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 826                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 827                         }
 828                 }
 829
 830                 dba::close($items);
 831                 dba::commit();
 832                 return $rows;
 833         }
 834
 835         /**
 836          * @brief Delete an item and notify others about it - if it was ours
 837          *
 838          * @param array $condition The condition for finding the item entries
 839          * @param integer $priority Priority for the notification
 840          */
 841         public static function delete($condition, $priority = PRIORITY_HIGH)
 842         {
 843                 $items = dba::select('item', ['id'], $condition);
 844                 while ($item = dba::fetch($items)) {
 845                         self::deleteById($item['id'], $priority);
 846                 }
 847                 dba::close($items);
 848         }
 849
 850         /**
 851          * @brief Delete an item for an user and notify others about it - if it was ours
 852          *
 853          * @param array $condition The condition for finding the item entries
 854          * @param integer $uid User who wants to delete this item
 855          */
 856         public static function deleteForUser($condition, $uid)
 857         {
 858                 if ($uid == 0) {
 859                         return;
 860                 }
 861
 862                 $items = dba::select('item', ['id', 'uid'], $condition);
 863                 while ($item = dba::fetch($items)) {
 864                         // "Deleting" global items just means hiding them
 865                         if ($item['uid'] == 0) {
 866                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 867                         } elseif ($item['uid'] == $uid) {
 868                                 self::deleteById($item['id'], PRIORITY_HIGH);
 869                         } else {
 870                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 871                         }
 872                 }
 873                 dba::close($items);
 874         }
 875
 876         /**
 877          * @brief Delete an item and notify others about it - if it was ours
 878          *
 879          * @param integer $item_id Item ID that should be delete
 880          * @param integer $priority Priority for the notification
 881          *
 882          * @return boolean success
 883          */
 884         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 885         {
 886                 // locate item to be deleted
 887                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 888                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 889                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 890                 $item = self::selectFirst($fields, ['id' => $item_id]);
 891                 if (!DBM::is_result($item)) {
 892                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 893                         return false;
 894                 }
 895
 896                 if ($item['deleted']) {
 897                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 898                         return false;
 899                 }
 900
 901                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
 902                 if (!DBM::is_result($parent)) {
 903                         $parent = ['origin' => false];
 904                 }
 905
 906                 // clean up categories and tags so they don't end up as orphans
 907
 908                 $matches = false;
 909                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 910                 if ($cnt) {
 911                         foreach ($matches as $mtch) {
 912                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 913                         }
 914                 }
 915
 916                 $matches = false;
 917
 918                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 919                 if ($cnt) {
 920                         foreach ($matches as $mtch) {
 921                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 922                         }
 923                 }
 924
 925                 /*
 926                  * If item is a link to a photo resource, nuke all the associated photos
 927                  * (visitors will not have photo resources)
 928                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 929                  * generate a resource-id and therefore aren't intimately linked to the item.
 930                  */
 931                 if (strlen($item['resource-id'])) {
 932                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 933                 }
 934
 935                 // If item is a link to an event, delete the event.
 936                 if (intval($item['event-id'])) {
 937                         Event::delete($item['event-id']);
 938                 }
 939
 940                 // If item has attachments, drop them
 941                 foreach (explode(", ", $item['attach']) as $attach) {
 942                         preg_match("|attach/(\d+)|", $attach, $matches);
 943                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 944                 }
 945
 946                 // Delete tags that had been attached to other items
 947                 self::deleteTagsFromItem($item);
 948
 949                 // Set the item to "deleted"
 950                 // This erasing of item content is superfluous for items with a matching item-content.
 951                 // But for the next time we will still have old content in the item table.
 952                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow(),
 953                         'body' => '', 'title' => '', 'content-warning' => '', 'rendered-hash' => '', 'rendered-html' => '',
 954                         'object' => '', 'target' => '', 'tag' => '', 'postopts' => '', 'attach' => '', 'file' => ''];
 955                 dba::update('item', $item_fields, ['id' => $item['id']]);
 956
 957                 Term::insertFromTagFieldByItemId($item['id'], '');
 958                 Term::insertFromFileFieldByItemId($item['id'], '');
 959                 self::deleteThread($item['id'], $item['parent-uri']);
 960
 961                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 962                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 963                 }
 964
 965                 // If it's the parent of a comment thread, kill all the kids
 966                 if ($item['id'] == $item['parent']) {
 967                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 968                 }
 969
 970                 // Is it our comment and/or our thread?
 971                 if ($item['origin'] || $parent['origin']) {
 972
 973                         // When we delete the original post we will delete all existing copies on the server as well
 974                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 975
 976                         // send the notification upstream/downstream
 977                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 978                 } elseif ($item['uid'] != 0) {
 979
 980                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 981                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 982                         if (DBM::is_result($global_item)) {
 983                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 984                         }
 985                 }
 986
 987                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 988
 989                 return true;
 990         }
 991
 992         private static function deleteTagsFromItem($item)
 993         {
 994                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 995                         return;
 996                 }
 997
 998                 $xo = XML::parseString($item["object"], false);
 999                 $xt = XML::parseString($item["target"], false);
1000
1001                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
1002                         return;
1003                 }
1004
1005                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1006                 if (!DBM::is_result($i)) {
1007                         return;
1008                 }
1009
1010                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1011                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1012                 $author_copy = $item["origin"];
1013
1014                 if (($owner_remove && $author_copy) || !$owner_remove) {
1015                         return;
1016                 }
1017
1018                 $tags = explode(',', $i["tag"]);
1019                 $newtags = [];
1020                 if (count($tags)) {
1021                         foreach ($tags as $tag) {
1022                                 if (trim($tag) !== trim($xo->body)) {
1023                                        $newtags[] = trim($tag);
1024                                 }
1025                         }
1026                 }
1027                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1028         }
1029
1030         private static function guid($item, $notify)
1031         {
1032                 $guid = notags(trim($item['guid']));
1033
1034                 if (!empty($guid)) {
1035                         return $guid;
1036                 }
1037
1038                 if ($notify) {
1039                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1040                         // We add the hash of our own host because our host is the original creator of the post.
1041                         $prefix_host = get_app()->get_hostname();
1042                 } else {
1043                         $prefix_host = '';
1044
1045                         // We are only storing the post so we create a GUID from the original hostname.
1046                         if (!empty($item['author-link'])) {
1047                                 $parsed = parse_url($item['author-link']);
1048                                 if (!empty($parsed['host'])) {
1049                                         $prefix_host = $parsed['host'];
1050                                 }
1051                         }
1052
1053                         if (empty($prefix_host) && !empty($item['plink'])) {
1054                                 $parsed = parse_url($item['plink']);
1055                                 if (!empty($parsed['host'])) {
1056                                         $prefix_host = $parsed['host'];
1057                                 }
1058                         }
1059
1060                         if (empty($prefix_host) && !empty($item['uri'])) {
1061                                 $parsed = parse_url($item['uri']);
1062                                 if (!empty($parsed['host'])) {
1063                                         $prefix_host = $parsed['host'];
1064                                 }
1065                         }
1066
1067                         // Is it in the format data@host.tld? - Used for mail contacts
1068                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1069                                 $mailparts = explode('@', $item['author-link']);
1070                                 $prefix_host = array_pop($mailparts);
1071                         }
1072                 }
1073
1074                 if (!empty($item['plink'])) {
1075                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1076                 } elseif (!empty($item['uri'])) {
1077                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1078                 } else {
1079                         $guid = get_guid(32, hash('crc32', $prefix_host));
1080                 }
1081
1082                 return $guid;
1083         }
1084
1085         private static function contactId($item)
1086         {
1087                 $contact_id = (int)$item["contact-id"];
1088
1089                 if (!empty($contact_id)) {
1090                         return $contact_id;
1091                 }
1092                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
1093                 /*
1094                  * First we are looking for a suitable contact that matches with the author of the post
1095                  * This is done only for comments
1096                  */
1097                 if ($item['parent-uri'] != $item['uri']) {
1098                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1099                 }
1100
1101                 // If not present then maybe the owner was found
1102                 if ($contact_id == 0) {
1103                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
1104                 }
1105
1106                 // Still missing? Then use the "self" contact of the current user
1107                 if ($contact_id == 0) {
1108                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
1109                         if (DBM::is_result($self)) {
1110                                 $contact_id = $self["id"];
1111                         }
1112                 }
1113                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
1114
1115                 return $contact_id;
1116         }
1117
1118         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1119         {
1120                 $a = get_app();
1121
1122                 // If it is a posting where users should get notifications, then define it as wall posting
1123                 if ($notify) {
1124                         $item['wall'] = 1;
1125                         $item['type'] = 'wall';
1126                         $item['origin'] = 1;
1127                         $item['network'] = NETWORK_DFRN;
1128                         $item['protocol'] = PROTOCOL_DFRN;
1129
1130                         if (is_int($notify)) {
1131                                 $priority = $notify;
1132                         } else {
1133                                 $priority = PRIORITY_HIGH;
1134                         }
1135                 } else {
1136                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
1137                 }
1138
1139                 $item['guid'] = self::guid($item, $notify);
1140                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
1141
1142                 // Store conversation data
1143                 $item = Conversation::insert($item);
1144
1145                 /*
1146                  * If a Diaspora signature structure was passed in, pull it out of the
1147                  * item array and set it aside for later storage.
1148                  */
1149
1150                 $dsprsig = null;
1151                 if (x($item, 'dsprsig')) {
1152                         $encoded_signature = $item['dsprsig'];
1153                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1154                         unset($item['dsprsig']);
1155                 }
1156
1157                 if (!empty($item['diaspora_signed_text'])) {
1158                         $diaspora_signed_text = $item['diaspora_signed_text'];
1159                         unset($item['diaspora_signed_text']);
1160                 } else {
1161                         $diaspora_signed_text = '';
1162                 }
1163
1164                 // Converting the plink
1165                 /// @TODO Check if this is really still needed
1166                 if ($item['network'] == NETWORK_OSTATUS) {
1167                         if (isset($item['plink'])) {
1168                                 $item['plink'] = OStatus::convertHref($item['plink']);
1169                         } elseif (isset($item['uri'])) {
1170                                 $item['plink'] = OStatus::convertHref($item['uri']);
1171                         }
1172                 }
1173
1174                 if (!empty($item['thr-parent'])) {
1175                         $item['parent-uri'] = $item['thr-parent'];
1176                 }
1177
1178                 $item['type'] = defaults($item, 'type', 'remote');
1179
1180                 if (isset($item['gravity'])) {
1181                         $item['gravity'] = intval($item['gravity']);
1182                 } elseif ($item['parent-uri'] === $item['uri']) {
1183                         $item['gravity'] = GRAVITY_PARENT;
1184                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1185                         $item['gravity'] = GRAVITY_COMMENT;
1186                 } elseif ($item['type'] == 'activity') {
1187                         $item['gravity'] = GRAVITY_ACTIVITY;
1188                 } else {
1189                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1190                         logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
1191                 }
1192
1193                 $uid = intval($item['uid']);
1194
1195                 // check for create date and expire time
1196                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1197
1198                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
1199                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1200                         $expire_interval = $user['expire'];
1201                 }
1202
1203                 if (($expire_interval > 0) && !empty($item['created'])) {
1204                         $expire_date = time() - ($expire_interval * 86400);
1205                         $created_date = strtotime($item['created']);
1206                         if ($created_date < $expire_date) {
1207                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
1208                                 return 0;
1209                         }
1210                 }
1211
1212                 /*
1213                  * Do we already have this item?
1214                  * We have to check several networks since Friendica posts could be repeated
1215                  * via OStatus (maybe Diasporsa as well)
1216                  */
1217                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
1218                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1219                                 trim($item['uri']), $item['uid'],
1220                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
1221                         $existing = self::selectFirst(['id', 'network'], $condition);
1222                         if (DBM::is_result($existing)) {
1223                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1224                                 if ($uid != 0) {
1225                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
1226                                 }
1227
1228                                 return $existing["id"];
1229                         }
1230                 }
1231
1232                 self::addLanguageToItemArray($item);
1233
1234                 $item['wall']          = intval(defaults($item, 'wall', 0));
1235                 $item['extid']         = trim(defaults($item, 'extid', ''));
1236                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1237                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1238                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1239                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1240                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1241                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1242                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1243                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1244                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1245                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1246                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1247                 $item['title']         = trim(defaults($item, 'title', ''));
1248                 $item['location']      = trim(defaults($item, 'location', ''));
1249                 $item['coord']         = trim(defaults($item, 'coord', ''));
1250                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1251                 $item['deleted']       = 0;
1252                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1253                 $item['verb']          = trim(defaults($item, 'verb', ''));
1254                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1255                 $item['object']        = trim(defaults($item, 'object', ''));
1256                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1257                 $item['target']        = trim(defaults($item, 'target', ''));
1258                 $item['plink']         = trim(defaults($item, 'plink', ''));
1259                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1260                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1261                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1262                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1263                 $item['private']       = intval(defaults($item, 'private', 0));
1264                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1265                 $item['body']          = trim(defaults($item, 'body', ''));
1266                 $item['tag']           = trim(defaults($item, 'tag', ''));
1267                 $item['attach']        = trim(defaults($item, 'attach', ''));
1268                 $item['app']           = trim(defaults($item, 'app', ''));
1269                 $item['origin']        = intval(defaults($item, 'origin', 0));
1270                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1271                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1272                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1273                 $item['inform']        = trim(defaults($item, 'inform', ''));
1274                 $item['file']          = trim(defaults($item, 'file', ''));
1275
1276                 // When there is no content then we don't post it
1277                 if ($item['body'].$item['title'] == '') {
1278                         logger('No body, no title.');
1279                         return 0;
1280                 }
1281
1282                 // Items cannot be stored before they happen ...
1283                 if ($item['created'] > DateTimeFormat::utcNow()) {
1284                         $item['created'] = DateTimeFormat::utcNow();
1285                 }
1286
1287                 // We haven't invented time travel by now.
1288                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1289                         $item['edited'] = DateTimeFormat::utcNow();
1290                 }
1291
1292                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1293                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1294                 }
1295
1296                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1297
1298                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1299                 $item["contact-id"] = self::contactId($item);
1300
1301                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1302                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1303
1304                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1305
1306                 if (Contact::isBlocked($item["author-id"])) {
1307                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1308                         return 0;
1309                 }
1310
1311                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1312                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1313
1314                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1315
1316                 if (Contact::isBlocked($item["owner-id"])) {
1317                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1318                         return 0;
1319                 }
1320
1321                 // These fields aren't stored anymore in the item table, they are fetched upon request
1322                 unset($item['author-link']);
1323                 unset($item['author-name']);
1324                 unset($item['author-avatar']);
1325
1326                 unset($item['owner-link']);
1327                 unset($item['owner-name']);
1328                 unset($item['owner-avatar']);
1329
1330                 if ($item['network'] == NETWORK_PHANTOM) {
1331                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1332
1333                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1334                         if (!empty($contact['network'])) {
1335                                 $item['network'] = $contact["network"];
1336                         } else {
1337                                 $item['network'] = NETWORK_DFRN;
1338                         }
1339                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1340                 }
1341
1342                 // Checking if there is already an item with the same guid
1343                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1344                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1345                 if (self::exists($condition)) {
1346                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1347                         return 0;
1348                 }
1349
1350                 // Check for hashtags in the body and repair or add hashtag links
1351                 self::setHashtags($item);
1352
1353                 $item['thr-parent'] = $item['parent-uri'];
1354
1355                 $notify_type = '';
1356                 $allow_cid = '';
1357                 $allow_gid = '';
1358                 $deny_cid  = '';
1359                 $deny_gid  = '';
1360
1361                 if ($item['parent-uri'] === $item['uri']) {
1362                         $parent_id = 0;
1363                         $parent_deleted = 0;
1364                         $allow_cid = $item['allow_cid'];
1365                         $allow_gid = $item['allow_gid'];
1366                         $deny_cid  = $item['deny_cid'];
1367                         $deny_gid  = $item['deny_gid'];
1368                         $notify_type = 'wall-new';
1369                 } else {
1370                         // find the parent and snarf the item id and ACLs
1371                         // and anything else we need to inherit
1372
1373                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1374                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1375                                 'wall', 'private', 'forum_mode', 'origin'];
1376                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1377                         $params = ['order' => ['id' => false]];
1378                         $parent = self::selectFirst($fields, $condition, $params);
1379
1380                         if (DBM::is_result($parent)) {
1381                                 // is the new message multi-level threaded?
1382                                 // even though we don't support it now, preserve the info
1383                                 // and re-attach to the conversation parent.
1384
1385                                 if ($parent['uri'] != $parent['parent-uri']) {
1386                                         $item['parent-uri'] = $parent['parent-uri'];
1387
1388                                         $condition = ['uri' => $item['parent-uri'],
1389                                                 'parent-uri' => $item['parent-uri'],
1390                                                 'uid' => $item['uid']];
1391                                         $params = ['order' => ['id' => false]];
1392                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1393
1394                                         if (DBM::is_result($toplevel_parent)) {
1395                                                 $parent = $toplevel_parent;
1396                                         }
1397                                 }
1398
1399                                 $parent_id      = $parent['id'];
1400                                 $parent_deleted = $parent['deleted'];
1401                                 $allow_cid      = $parent['allow_cid'];
1402                                 $allow_gid      = $parent['allow_gid'];
1403                                 $deny_cid       = $parent['deny_cid'];
1404                                 $deny_gid       = $parent['deny_gid'];
1405                                 $item['wall']    = $parent['wall'];
1406                                 $notify_type    = 'comment-new';
1407
1408                                 /*
1409                                  * If the parent is private, force privacy for the entire conversation
1410                                  * This differs from the above settings as it subtly allows comments from
1411                                  * email correspondents to be private even if the overall thread is not.
1412                                  */
1413                                 if ($parent['private']) {
1414                                         $item['private'] = $parent['private'];
1415                                 }
1416
1417                                 /*
1418                                  * Edge case. We host a public forum that was originally posted to privately.
1419                                  * The original author commented, but as this is a comment, the permissions
1420                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1421                                  */
1422                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1423                                         $item['private'] = 0;
1424                                 }
1425
1426                                 // If its a post from myself then tag the thread as "mention"
1427                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1428                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1429                                 if (DBM::is_result($user)) {
1430                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1431                                         $self_id = Contact::getIdForURL($self, 0, true);
1432                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1433                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1434                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1435                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1436                                         }
1437                                 }
1438                         } else {
1439                                 /*
1440                                  * Allow one to see reply tweets from status.net even when
1441                                  * we don't have or can't see the original post.
1442                                  */
1443                                 if ($force_parent) {
1444                                         logger('$force_parent=true, reply converted to top-level post.');
1445                                         $parent_id = 0;
1446                                         $item['parent-uri'] = $item['uri'];
1447                                         $item['gravity'] = GRAVITY_PARENT;
1448                                 } else {
1449                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1450                                         return 0;
1451                                 }
1452
1453                                 $parent_deleted = 0;
1454                         }
1455                 }
1456
1457                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1458                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1459                 if (self::exists($condition)) {
1460                         logger('duplicated item with the same uri found. '.print_r($item,true));
1461                         return 0;
1462                 }
1463
1464                 // On Friendica and Diaspora the GUID is unique
1465                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1466                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1467                         if (self::exists($condition)) {
1468                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1469                                 return 0;
1470                         }
1471                 } else {
1472                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1473                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1474                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1475                         if (self::exists($condition)) {
1476                                 logger('duplicated item with the same body found. '.print_r($item,true));
1477                                 return 0;
1478                         }
1479                 }
1480
1481                 // Is this item available in the global items (with uid=0)?
1482                 if ($item["uid"] == 0) {
1483                         $item["global"] = true;
1484
1485                         // Set the global flag on all items if this was a global item entry
1486                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1487                 } else {
1488                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1489                 }
1490
1491                 // ACL settings
1492                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1493                         $private = 1;
1494                 } else {
1495                         $private = $item['private'];
1496                 }
1497
1498                 $item["allow_cid"] = $allow_cid;
1499                 $item["allow_gid"] = $allow_gid;
1500                 $item["deny_cid"] = $deny_cid;
1501                 $item["deny_gid"] = $deny_gid;
1502                 $item["private"] = $private;
1503                 $item["deleted"] = $parent_deleted;
1504
1505                 // Fill the cache field
1506                 put_item_in_cache($item);
1507
1508                 if ($notify) {
1509                         Addon::callHooks('post_local', $item);
1510                 } else {
1511                         Addon::callHooks('post_remote', $item);
1512                 }
1513
1514                 // This array field is used to trigger some automatic reactions
1515                 // It is mainly used in the "post_local" hook.
1516                 unset($item['api_source']);
1517
1518                 if (x($item, 'cancel')) {
1519                         logger('post cancelled by addon.');
1520                         return 0;
1521                 }
1522
1523                 /*
1524                  * Check for already added items.
1525                  * There is a timing issue here that sometimes creates double postings.
1526                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1527                  */
1528                 if ($item["uid"] == 0) {
1529                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1530                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1531                                 return 0;
1532                         }
1533                 }
1534
1535                 logger('' . print_r($item,true), LOGGER_DATA);
1536
1537                 if (array_key_exists('tag', $item)) {
1538                         $tags = $item['tag'];
1539                         unset($item['tag']);
1540                 } else {
1541                         $tags = '';
1542                 }
1543
1544                 if (array_key_exists('file', $item)) {
1545                         $files = $item['file'];
1546                         unset($item['file']);
1547                 } else {
1548                         $files = '';
1549                 }
1550
1551                 // We are doing this outside of the transaction to avoid timing problems
1552                 if (!self::insertActivity($item)) {
1553                         self::insertContent($item);
1554                 }
1555
1556                 dba::transaction();
1557                 $ret = dba::insert('item', $item);
1558
1559                 // When the item was successfully stored we fetch the ID of the item.
1560                 if (DBM::is_result($ret)) {
1561                         $current_post = dba::lastInsertId();
1562                 } else {
1563                         // This can happen - for example - if there are locking timeouts.
1564                         dba::rollback();
1565
1566                         // Store the data into a spool file so that we can try again later.
1567
1568                         // At first we restore the Diaspora signature that we removed above.
1569                         if (isset($encoded_signature)) {
1570                                 $item['dsprsig'] = $encoded_signature;
1571                         }
1572
1573                         // Now we store the data in the spool directory
1574                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1575                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1576
1577                         $spoolpath = get_spoolpath();
1578                         if ($spoolpath != "") {
1579                                 $spool = $spoolpath.'/'.$file;
1580                                 file_put_contents($spool, json_encode($item));
1581                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1582                         }
1583                         return 0;
1584                 }
1585
1586                 if ($current_post == 0) {
1587                         // This is one of these error messages that never should occur.
1588                         logger("couldn't find created item - we better quit now.");
1589                         dba::rollback();
1590                         return 0;
1591                 }
1592
1593                 // How much entries have we created?
1594                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1595                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1596
1597                 if ($entries > 1) {
1598                         // There are duplicates. We delete our just created entry.
1599                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1600
1601                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1602                         dba::delete('item', ['id' => $current_post]);
1603                         dba::commit();
1604                         return 0;
1605                 } elseif ($entries == 0) {
1606                         // This really should never happen since we quit earlier if there were problems.
1607                         logger("Something is terribly wrong. We haven't found our created entry.");
1608                         dba::rollback();
1609                         return 0;
1610                 }
1611
1612                 logger('created item '.$current_post);
1613                 self::updateContact($item);
1614
1615                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1616                         $parent_id = $current_post;
1617                 }
1618
1619                 // Set parent id
1620                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1621
1622                 $item['id'] = $current_post;
1623                 $item['parent'] = $parent_id;
1624
1625                 // update the commented timestamp on the parent
1626                 // Only update "commented" if it is really a comment
1627                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1628                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1629                 } else {
1630                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1631                 }
1632
1633                 if ($dsprsig) {
1634                         /*
1635                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1636                          * We can check for this condition when we decode and encode the stuff again.
1637                          */
1638                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1639                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1640                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1641                         }
1642
1643                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1644                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1645                 }
1646
1647                 if (!empty($diaspora_signed_text)) {
1648                         // Formerly we stored the signed text, the signature and the author in different fields.
1649                         // We now store the raw data so that we are more flexible.
1650                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1651                 }
1652
1653                 $deleted = self::tagDeliver($item['uid'], $current_post);
1654
1655                 /*
1656                  * current post can be deleted if is for a community page and no mention are
1657                  * in it.
1658                  */
1659                 if (!$deleted && !$dontcache) {
1660                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1661                         if (DBM::is_result($posted_item)) {
1662                                 if ($notify) {
1663                                         Addon::callHooks('post_local_end', $posted_item);
1664                                 } else {
1665                                         Addon::callHooks('post_remote_end', $posted_item);
1666                                 }
1667                         } else {
1668                                 logger('new item not found in DB, id ' . $current_post);
1669                         }
1670                 }
1671
1672                 if ($item['parent-uri'] === $item['uri']) {
1673                         self::addThread($current_post);
1674                 } else {
1675                         self::updateThread($parent_id);
1676                 }
1677
1678                 dba::commit();
1679
1680                 /*
1681                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1682                  * This is not perfect - but a workable solution until we found the reason for the problem.
1683                  */
1684                 if (!empty($tags)) {
1685                         Term::insertFromTagFieldByItemId($current_post, $tags);
1686                 }
1687
1688                 if (!empty($files)) {
1689                         Term::insertFromFileFieldByItemId($current_post, $files);
1690                 }
1691
1692                 if ($item['parent-uri'] === $item['uri']) {
1693                         self::addShadow($current_post);
1694                 } else {
1695                         self::addShadowPost($current_post);
1696                 }
1697
1698                 check_user_notification($current_post);
1699
1700                 if ($notify) {
1701                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1702                 } elseif (!empty($parent) && $parent['origin']) {
1703                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1704                 }
1705
1706                 return $current_post;
1707         }
1708
1709         /**
1710          * @brief Insert a new item content entry
1711          *
1712          * @param array $item The item fields that are to be inserted
1713          */
1714         private static function insertActivity(&$item)
1715         {
1716                 $activity_index = self::activityToIndex($item['verb']);
1717
1718                 if ($activity_index < 0) {
1719                         return false;
1720                 }
1721
1722                 $fields = ['uri' => $item['uri'], 'activity' => $activity_index,
1723                         'uri-hash' => hash('sha1', $item['uri']) . hash('ripemd160', $item['uri'])];
1724
1725                 $saved_item = $item;
1726
1727                 // We just remove everything that is content
1728                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1729                         unset($item[$field]);
1730                 }
1731
1732                 // To avoid timing problems, we are using locks.
1733                 $locked = Lock::set('item_insert_activity');
1734                 if (!$locked) {
1735                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1736                 }
1737
1738                 // Do we already have this content?
1739                 $item_activity = dba::selectFirst('item-activity', ['id'], ['uri' => $item['uri']]);
1740                 if (DBM::is_result($item_activity)) {
1741                         $item['iaid'] = $item_activity['id'];
1742                         logger('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1743                 } elseif (dba::insert('item-activity', $fields)) {
1744                         $item['iaid'] = dba::lastInsertId();
1745                         logger('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1746                 } else {
1747                         // This shouldn't happen. But if it does, we simply store it in the item-content table
1748                         logger('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
1749                         $item = $saved_item;
1750                         return false;
1751                 }
1752                 if ($locked) {
1753                         Lock::remove('item_insert_activity');
1754                 }
1755                 return true;
1756         }
1757
1758         /**
1759          * @brief Insert a new item content entry
1760          *
1761          * @param array $item The item fields that are to be inserted
1762          */
1763         private static function insertContent(&$item)
1764         {
1765                 $fields = ['uri' => $item['uri'], 'plink' => $item['plink'],
1766                         'uri-plink-hash' => hash('sha1', $item['plink']).hash('sha1', $item['uri'])];
1767
1768                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1769                         if (isset($item[$field])) {
1770                                 $fields[$field] = $item[$field];
1771                                 unset($item[$field]);
1772                         }
1773                 }
1774
1775                 // To avoid timing problems, we are using locks.
1776                 $locked = Lock::set('item_insert_content');
1777                 if (!$locked) {
1778                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1779                 }
1780
1781                 // Do we already have this content?
1782                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $item['uri']]);
1783                 if (DBM::is_result($item_content)) {
1784                         $item['icid'] = $item_content['id'];
1785                         logger('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1786                 } elseif (dba::insert('item-content', $fields)) {
1787                         $item['icid'] = dba::lastInsertId();
1788                         logger('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1789                 } else {
1790                         // By setting the ICID value through the worker we should avoid timing problems.
1791                         // When the locking works, this shouldn't be needed. But better be prepared.
1792                         Worker::add(PRIORITY_HIGH, 'SetItemContentID', $item['uri']);
1793                         logger('Could not insert content for URI ' . $item['uri'] . ' - trying asynchronously');
1794                 }
1795                 if ($locked) {
1796                         Lock::remove('item_insert_content');
1797                 }
1798         }
1799
1800         /**
1801          * @brief Set the item content id for a given URI
1802          *
1803          * @param string $uri The item URI
1804          */
1805         public static function setICIDforURI($uri)
1806         {
1807                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $uri]);
1808                 if (DBM::is_result($item_content)) {
1809                         dba::update('item', ['icid' => $item_content['id']], ['icid' => 0, 'uri' => $uri]);
1810                         logger('Asynchronously set item content id for URI ' . $uri . ' (' . $item_content['id'] . ') - Affected: '. (int)dba::affected_rows());
1811                 } else {
1812                         logger('No item-content found for URI ' . $uri);
1813                 }
1814         }
1815
1816         /**
1817          * @brief Update existing item content entries
1818          *
1819          * @param array $item The item fields that are to be changed
1820          * @param array $condition The condition for finding the item content entries
1821          */
1822         private static function updateActivity($item, $condition)
1823         {
1824                 if (empty($item['verb'])) {
1825                         return false;
1826                 }
1827                 $activity_index = self::activityToIndex($item['verb']);
1828
1829                 if ($activity_index < 0) {
1830                         return false;
1831                 }
1832
1833                 $fields = ['activity' => $activity_index,
1834                         'uri-hash' => hash('sha1', $condition['uri']) . hash('ripemd160', $condition['uri'])];
1835
1836                 logger('Update activity for URI ' . $condition['uri']);
1837
1838                 dba::update('item-activity', $fields, $condition, true);
1839
1840                 return true;
1841         }
1842
1843         /**
1844          * @brief Update existing item content entries
1845          *
1846          * @param array $item The item fields that are to be changed
1847          * @param array $condition The condition for finding the item content entries
1848          */
1849         private static function updateContent($item, $condition)
1850         {
1851                 // We have to select only the fields from the "item-content" table
1852                 $fields = [];
1853                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1854                         if (isset($item[$field])) {
1855                                 $fields[$field] = $item[$field];
1856                         }
1857                 }
1858
1859                 if (empty($fields)) {
1860                         // when there are no fields at all, just use the condition
1861                         // This is to ensure that we always store content.
1862                         $fields = $condition;
1863                 }
1864
1865                 if (!empty($item['plink'])) {
1866                         $fields['uri-plink-hash'] = hash('sha1', $item['plink']) . hash('sha1', $condition['uri']);
1867                 } else {
1868                         // Ensure that we don't delete the plink
1869                         unset($fields['plink']);
1870                 }
1871
1872                 logger('Update content for URI ' . $condition['uri']);
1873
1874                 dba::update('item-content', $fields, $condition, true);
1875         }
1876
1877         /**
1878          * @brief Distributes public items to the receivers
1879          *
1880          * @param integer $itemid      Item ID that should be added
1881          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1882          */
1883         public static function distribute($itemid, $signed_text = '')
1884         {
1885                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1886                 $parent = self::selectFirst(['owner-id'], $condition);
1887                 if (!DBM::is_result($parent)) {
1888                         return;
1889                 }
1890
1891                 // Only distribute public items from native networks
1892                 $condition = ['id' => $itemid, 'uid' => 0,
1893                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1894                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1895                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1896                 if (!DBM::is_result($item)) {
1897                         return;
1898                 }
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'] && !$item['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 = get_guid(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'] && (($arr["author-link"] === $arr["owner-link"]) || ($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 ($datarray["extid"] == NETWORK_DFRN) {
2454                         logger('Already forwarded', LOGGER_DEBUG);
2455                         return false;
2456                 }
2457
2458                 // Prevent to forward already forwarded posts
2459                 if ($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                                 $datarray["guid"] = get_guid(32);
2501                                 unset($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                 $new_item = [
2937                         'guid'          => get_guid(32),
2938                         'uri'           => self::newURI($item['uid']),
2939                         'uid'           => $item['uid'],
2940                         'contact-id'    => $item_contact_id,
2941                         'type'          => 'activity',
2942                         'wall'          => $item['wall'],
2943                         'origin'        => 1,
2944                         'gravity'       => GRAVITY_ACTIVITY,
2945                         'parent'        => $item['id'],
2946                         'parent-uri'    => $item['uri'],
2947                         'thr-parent'    => $item['uri'],
2948                         'owner-id'      => $item['owner-id'],
2949                         'author-id'     => $author_id,
2950                         'body'          => $activity,
2951                         'verb'          => $activity,
2952                         'object-type'   => $objtype,
2953                         'allow_cid'     => $item['allow_cid'],
2954                         'allow_gid'     => $item['allow_gid'],
2955                         'deny_cid'      => $item['deny_cid'],
2956                         'deny_gid'      => $item['deny_gid'],
2957                         'visible'       => 1,
2958                         'unseen'        => 1,
2959                 ];
2960
2961                 $new_item_id = self::insert($new_item);
2962
2963                 // If the parent item isn't visible then set it to visible
2964                 if (!$item['visible']) {
2965                         self::update(['visible' => true], ['id' => $item['id']]);
2966                 }
2967
2968                 // Save the author information for the like in case we need to relay to Diaspora
2969                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2970
2971                 $new_item['id'] = $new_item_id;
2972
2973                 Addon::callHooks('post_local_end', $new_item);
2974
2975                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2976
2977                 return true;
2978         }
2979
2980         private static function addThread($itemid, $onlyshadow = false)
2981         {
2982                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2983                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2984                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2985                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2986                 $item = self::selectFirst($fields, $condition);
2987
2988                 if (!DBM::is_result($item)) {
2989                         return;
2990                 }
2991
2992                 $item['iid'] = $itemid;
2993
2994                 if (!$onlyshadow) {
2995                         $result = dba::insert('thread', $item);
2996
2997                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2998                 }
2999         }
3000
3001         private static function updateThread($itemid, $setmention = false)
3002         {
3003                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
3004                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
3005                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3006                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3007
3008                 $item = self::selectFirst($fields, $condition);
3009                 if (!DBM::is_result($item)) {
3010                         return;
3011                 }
3012
3013                 if ($setmention) {
3014                         $item["mention"] = 1;
3015                 }
3016
3017                 $sql = "";
3018
3019                 $fields = [];
3020
3021                 foreach ($item as $field => $data) {
3022                         if (!in_array($field, ["guid"])) {
3023                                 $fields[$field] = $data;
3024                         }
3025                 }
3026
3027                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
3028
3029                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
3030         }
3031
3032         private static function deleteThread($itemid, $itemuri = "")
3033         {
3034                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3035                 if (!DBM::is_result($item)) {
3036                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
3037                         return;
3038                 }
3039
3040                 // Using dba::delete at this time could delete the associated item entries
3041                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
3042
3043                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
3044
3045                 if ($itemuri != "") {
3046                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3047                         if (!self::exists($condition)) {
3048                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3049                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
3050                         }
3051                 }
3052         }
3053 }