src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use dba;
  10 use Friendica\BaseObject;
  11 use Friendica\Content\Text;
  12 use Friendica\Core\Addon;
  13 use Friendica\Core\Config;
  14 use Friendica\Core\L10n;
  15 use Friendica\Core\Lock;
  16 use Friendica\Core\PConfig;
  17 use Friendica\Core\System;
  18 use Friendica\Core\Worker;
  19 use Friendica\Database\DBM;
  20 use Friendica\Object\Image;
  21 use Friendica\Protocol\Diaspora;
  22 use Friendica\Protocol\OStatus;
  23 use Friendica\Util\DateTimeFormat;
  24 use Friendica\Util\XML;
  25 use Text_LanguageDetect;
  26
  27 require_once 'boot.php';
  28 require_once 'include/items.php';
  29 require_once 'include/text.php';
  30
  31 class Item extends BaseObject
  32 {
  33         // Field list that is used to display the items
  34         const DISPLAY_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network',
  35                         'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  36                         'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  37                         'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  38                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  39                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  40                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  41                         'contact-id', 'contact-link', 'contact-name', 'contact-avatar',
  42                         'writable', 'self', 'cid', 'alias',
  43                         'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  44                         'event-summary', 'event-desc', 'event-location', 'event-type',
  45                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
  46
  47         // Field list that is used to deliver items via the protocols
  48         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  49                         'created', 'edited', 'verb', 'object-type', 'object', 'target',
  50                         'private', 'title', 'body', 'location', 'coord', 'app',
  51                         'attach', 'tag', 'bookmark', 'deleted', 'extid',
  52                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  53                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  54                         'signed_text', 'signature', 'signer', 'network'];
  55
  56         // Field list for "item-content" table that is mixed with the item table
  57         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  58                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  59                         'object-type', 'object', 'target-type', 'target', 'plink'];
  60
  61         // Field list for "item-content" table that is not present in the "item" table
  62         const CONTENT_FIELDLIST = ['language'];
  63
  64         // All fields in the item table
  65         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  66                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid',
  67                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  68                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  69                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  70                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  71                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  72                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  73                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  74                         'author-id', 'author-link', 'author-name', 'author-avatar',
  75                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  76
  77         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  78         // The item-activity table only stores the index and needs this array to know the matching activity.
  79         const ACTIVITIES = [ACTIVITY_LIKE, ACTIVITY_DISLIKE, ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
  80
  81         private static $legacy_mode = null;
  82
  83         public static function isLegacyMode()
  84         {
  85                 if (is_null(self::$legacy_mode)) {
  86                         self::$legacy_mode = (Config::get("system", "post_update_version") < 1276);
  87                 }
  88
  89                 return self::$legacy_mode;
  90         }
  91
  92         /**
  93          * @brief returns an activity index from an activity string
  94          *
  95          * @param string $activity activity string
  96          * @return integer Activity index
  97          */
  98         private static function activityToIndex($activity)
  99         {
 100                 $index = array_search($activity, self::ACTIVITIES);
 101
 102                 if (is_bool($index)) {
 103                         $index = -1;
 104                 }
 105
 106                 return $index;
 107         }
 108
 109         /**
 110          * @brief returns an activity string from an activity index
 111          *
 112          * @param integer $index activity index
 113          * @return string Activity string
 114          */
 115         private static function indexToActivity($index)
 116         {
 117                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 118                         return '';
 119                 }
 120
 121                 return self::ACTIVITIES[$index];
 122         }
 123
 124         /**
 125          * @brief Fetch a single item row
 126          *
 127          * @param mixed $stmt statement object
 128          * @return array current row
 129          */
 130         public static function fetch($stmt)
 131         {
 132                 $row = dba::fetch($stmt);
 133
 134                 if (is_bool($row)) {
 135                         return $row;
 136                 }
 137
 138                 // ---------------------- Transform item structure data ----------------------
 139
 140                 // We prefer the data from the user's contact over the public one
 141                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 142                         ($row['author-link'] == $row['contact-link'])) {
 143                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 144                                 $row['author-avatar'] = $row['contact-avatar'];
 145                         }
 146                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 147                                 $row['author-name'] = $row['contact-name'];
 148                         }
 149                 }
 150
 151                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 152                         ($row['owner-link'] == $row['contact-link'])) {
 153                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 154                                 $row['owner-avatar'] = $row['contact-avatar'];
 155                         }
 156                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 157                                 $row['owner-name'] = $row['contact-name'];
 158                         }
 159                 }
 160
 161                 // We can always comment on posts from these networks
 162                 if (array_key_exists('writable', $row) &&
 163                         in_array($row['internal-network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
 164                         $row['writable'] = true;
 165                 }
 166
 167                 // ---------------------- Transform item content data ----------------------
 168
 169                 // Fetch data from the item-content table whenever there is content there
 170                 if (self::isLegacyMode()) {
 171                         foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 172                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 173                                         $row[$field] = $row['internal-item-' . $field];
 174                                 }
 175                                 unset($row['internal-item-' . $field]);
 176                         }
 177                 }
 178
 179                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 180                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 181                         if (array_key_exists('title', $row)) {
 182                                 $row['title'] = '';
 183                         }
 184                         if (array_key_exists('body', $row)) {
 185                                 $row['body'] = $row['verb'];
 186                         }
 187                         if (array_key_exists('object', $row)) {
 188                                 $row['object'] = '';
 189                         }
 190                         if (array_key_exists('object-type', $row)) {
 191                                 $row['object-type'] = ACTIVITY_OBJ_NOTE;
 192                         }
 193                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', ACTIVITY_POST, ACTIVITY_SHARE])) {
 194                         // Posts don't have an object or target - but having tags or files.
 195                         // We safe some performance by building tag and file strings only here.
 196                         // We remove object and target since they aren't used for this type.
 197                         if (array_key_exists('object', $row)) {
 198                                 $row['object'] = '';
 199                         }
 200                         if (array_key_exists('target', $row)) {
 201                                 $row['target'] = '';
 202                         }
 203                 }
 204
 205                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', ACTIVITY_POST, ACTIVITY_SHARE])) {
 206                         // Build the tag string out of the term entries
 207                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 208                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 209                         }
 210
 211                         // Build the file string out of the term entries
 212                         if (array_key_exists('file', $row) && empty($row['file'])) {
 213                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 214                         }
 215                 }
 216
 217                 // Remove internal fields
 218                 unset($row['internal-activity']);
 219                 unset($row['internal-network']);
 220                 unset($row['internal-iid']);
 221                 unset($row['internal-iaid']);
 222                 unset($row['internal-icid']);
 223
 224                 return $row;
 225         }
 226
 227         /**
 228          * @brief Fills an array with data from an item query
 229          *
 230          * @param object $stmt statement object
 231          * @return array Data array
 232          */
 233         public static function inArray($stmt, $do_close = true) {
 234                 if (is_bool($stmt)) {
 235                         return $stmt;
 236                 }
 237
 238                 $data = [];
 239                 while ($row = self::fetch($stmt)) {
 240                         $data[] = $row;
 241                 }
 242                 if ($do_close) {
 243                         dba::close($stmt);
 244                 }
 245                 return $data;
 246         }
 247
 248         /**
 249          * @brief Check if item data exists
 250          *
 251          * @param array $condition array of fields for condition
 252          *
 253          * @return boolean Are there rows for that condition?
 254          */
 255         public static function exists($condition) {
 256                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 257
 258                 if (is_bool($stmt)) {
 259                         $retval = $stmt;
 260                 } else {
 261                         $retval = (dba::num_rows($stmt) > 0);
 262                 }
 263
 264                 dba::close($stmt);
 265
 266                 return $retval;
 267         }
 268
 269         /**
 270          * Retrieve a single record from the item table for a given user and returns it in an associative array
 271          *
 272          * @brief Retrieve a single record from a table
 273          * @param integer $uid User ID
 274          * @param array  $fields
 275          * @param array  $condition
 276          * @param array  $params
 277          * @return bool|array
 278          * @see dba::select
 279          */
 280         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 281         {
 282                 $params['uid'] = $uid;
 283
 284                 if (empty($selected)) {
 285                         $selected = Item::DISPLAY_FIELDLIST;
 286                 }
 287
 288                 return self::selectFirst($selected, $condition, $params);
 289         }
 290
 291         /**
 292          * @brief Select rows from the item table for a given user
 293          *
 294          * @param integer $uid User ID
 295          * @param array  $selected  Array of selected fields, empty for all
 296          * @param array  $condition Array of fields for condition
 297          * @param array  $params    Array of several parameters
 298          *
 299          * @return boolean|object
 300          */
 301         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 302         {
 303                 $params['uid'] = $uid;
 304
 305                 if (empty($selected)) {
 306                         $selected = Item::DISPLAY_FIELDLIST;
 307                 }
 308
 309                 return self::select($selected, $condition, $params);
 310         }
 311
 312         /**
 313          * Retrieve a single record from the item table and returns it in an associative array
 314          *
 315          * @brief Retrieve a single record from a table
 316          * @param array  $fields
 317          * @param array  $condition
 318          * @param array  $params
 319          * @return bool|array
 320          * @see dba::select
 321          */
 322         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 323         {
 324                 $params['limit'] = 1;
 325
 326                 $result = self::select($fields, $condition, $params);
 327
 328                 if (is_bool($result)) {
 329                         return $result;
 330                 } else {
 331                         $row = self::fetch($result);
 332                         dba::close($result);
 333                         return $row;
 334                 }
 335         }
 336
 337         /**
 338          * @brief Select rows from the item table
 339          *
 340          * @param array  $selected  Array of selected fields, empty for all
 341          * @param array  $condition Array of fields for condition
 342          * @param array  $params    Array of several parameters
 343          *
 344          * @return boolean|object
 345          */
 346         public static function select(array $selected = [], array $condition = [], $params = [])
 347         {
 348                 $uid = 0;
 349                 $usermode = false;
 350
 351                 if (isset($params['uid'])) {
 352                         $uid = $params['uid'];
 353                         $usermode = true;
 354                 }
 355
 356                 $fields = self::fieldlist($selected);
 357
 358                 $select_fields = self::constructSelectFields($fields, $selected);
 359
 360                 $condition_string = dba::buildCondition($condition);
 361
 362                 $condition_string = self::addTablesToFields($condition_string, $fields);
 363
 364                 if ($usermode) {
 365                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 366                 }
 367
 368                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 369
 370                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 371
 372                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 373
 374                 return dba::p($sql, $condition);
 375         }
 376
 377         /**
 378          * @brief Select rows from the starting post in the item table
 379          *
 380          * @param integer $uid User ID
 381          * @param array  $fields    Array of selected fields, empty for all
 382          * @param array  $condition Array of fields for condition
 383          * @param array  $params    Array of several parameters
 384          *
 385          * @return boolean|object
 386          */
 387         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 388         {
 389                 $params['uid'] = $uid;
 390
 391                 if (empty($selected)) {
 392                         $selected = Item::DISPLAY_FIELDLIST;
 393                 }
 394
 395                 return self::selectThread($selected, $condition, $params);
 396         }
 397
 398         /**
 399          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 400          *
 401          * @brief Retrieve a single record from a table
 402          * @param integer $uid User ID
 403          * @param array  $selected
 404          * @param array  $condition
 405          * @param array  $params
 406          * @return bool|array
 407          * @see dba::select
 408          */
 409         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 410         {
 411                 $params['uid'] = $uid;
 412
 413                 if (empty($selected)) {
 414                         $selected = Item::DISPLAY_FIELDLIST;
 415                 }
 416
 417                 return self::selectFirstThread($selected, $condition, $params);
 418         }
 419
 420         /**
 421          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 422          *
 423          * @brief Retrieve a single record from a table
 424          * @param array  $fields
 425          * @param array  $condition
 426          * @param array  $params
 427          * @return bool|array
 428          * @see dba::select
 429          */
 430         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 431         {
 432                 $params['limit'] = 1;
 433                 $result = self::selectThread($fields, $condition, $params);
 434
 435                 if (is_bool($result)) {
 436                         return $result;
 437                 } else {
 438                         $row = self::fetch($result);
 439                         dba::close($result);
 440                         return $row;
 441                 }
 442         }
 443
 444         /**
 445          * @brief Select rows from the starting post in the item table
 446          *
 447          * @param array  $selected  Array of selected fields, empty for all
 448          * @param array  $condition Array of fields for condition
 449          * @param array  $params    Array of several parameters
 450          *
 451          * @return boolean|object
 452          */
 453         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 454         {
 455                 $uid = 0;
 456                 $usermode = false;
 457
 458                 if (isset($params['uid'])) {
 459                         $uid = $params['uid'];
 460                         $usermode = true;
 461                 }
 462
 463                 $fields = self::fieldlist($selected);
 464
 465                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 466                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 467                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 468                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 469
 470                 $select_fields = self::constructSelectFields($fields, $selected);
 471
 472                 $condition_string = dba::buildCondition($condition);
 473
 474                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 475                 $condition_string = self::addTablesToFields($condition_string, $fields);
 476
 477                 if ($usermode) {
 478                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 479                 }
 480
 481                 $param_string = dba::buildParameter($params);
 482                 $param_string = self::addTablesToFields($param_string, $threadfields);
 483                 $param_string = self::addTablesToFields($param_string, $fields);
 484
 485                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 486
 487                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 488
 489                 return dba::p($sql, $condition);
 490         }
 491
 492         /**
 493          * @brief Returns a list of fields that are associated with the item table
 494          *
 495          * @return array field list
 496          */
 497         private static function fieldlist($selected)
 498         {
 499                 $fields = [];
 500
 501                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 502                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 503                         'created', 'edited', 'commented', 'received', 'changed', 'postopts',
 504                         'resource-id', 'event-id', 'tag', 'attach', 'inform',
 505                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 506                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 507                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 508                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 509                         'network' => 'internal-network', 'icid' => 'internal-icid',
 510                         'iaid' => 'internal-iaid'];
 511
 512                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 513
 514                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 515
 516                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 517                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 518
 519                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 520                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 521
 522                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 523                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 524                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 525
 526                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 527
 528                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 529
 530                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 531                         'start' => 'event-start','finish' => 'event-finish',
 532                         'summary' => 'event-summary','desc' => 'event-desc',
 533                         'location' => 'event-location', 'type' => 'event-type',
 534                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 535                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 536
 537                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 538
 539                 return $fields;
 540         }
 541
 542         /**
 543          * @brief Returns SQL condition for the "select" functions
 544          *
 545          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 546          *
 547          * @return string SQL condition
 548          */
 549         private static function condition($thread_mode)
 550         {
 551                 if ($thread_mode) {
 552                         $master_table = "`thread`";
 553                 } else {
 554                         $master_table = "`item`";
 555                 }
 556                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 557         }
 558
 559         /**
 560          * @brief Returns all needed "JOIN" commands for the "select" functions
 561          *
 562          * @param integer $uid User ID
 563          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 564          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 565          *
 566          * @return string The SQL joins for the "select" functions
 567          */
 568         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 569         {
 570                 if ($thread_mode) {
 571                         $master_table = "`thread`";
 572                         $master_table_key = "`thread`.`iid`";
 573                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 574                 } else {
 575                         $master_table = "`item`";
 576                         $master_table_key = "`item`.`id`";
 577                         $joins = '';
 578                 }
 579
 580                 if ($user_mode) {
 581                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 582                                 AND NOT `contact`.`blocked`
 583                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 584                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 585                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 586                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 587                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 588                                 CONTACT_IS_SHARING, CONTACT_IS_FRIEND, GRAVITY_PARENT, intval($uid));
 589                 } else {
 590                         if (strpos($sql_commands, "`contact`.") !== false) {
 591                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 592                         }
 593                         if (strpos($sql_commands, "`author`.") !== false) {
 594                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 595                         }
 596                         if (strpos($sql_commands, "`owner`.") !== false) {
 597                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 598                         }
 599                 }
 600
 601                 if (strpos($sql_commands, "`group_member`.") !== false) {
 602                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 603                 }
 604
 605                 if (strpos($sql_commands, "`user`.") !== false) {
 606                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 607                 }
 608
 609                 if (strpos($sql_commands, "`event`.") !== false) {
 610                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 611                 }
 612
 613                 if (strpos($sql_commands, "`sign`.") !== false) {
 614                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 615                 }
 616
 617                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 618                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`id` = `item`.`iaid`";
 619                 }
 620
 621                 if (strpos($sql_commands, "`item-content`.") !== false) {
 622                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
 623                 }
 624
 625                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 626                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 627                 }
 628
 629                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 630                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 631                 }
 632
 633                 return $joins;
 634         }
 635
 636         /**
 637          * @brief Add the field list for the "select" functions
 638          *
 639          * @param array $fields The field definition array
 640          * @param array $selected The array with the selected fields from the "select" functions
 641          *
 642          * @return string The field list
 643          */
 644         private static function constructSelectFields($fields, $selected)
 645         {
 646                 if (!empty($selected)) {
 647                         $selected[] = 'internal-iid';
 648                         $selected[] = 'internal-iaid';
 649                         $selected[] = 'internal-icid';
 650                         $selected[] = 'internal-network';
 651                 }
 652
 653                 if (in_array('verb', $selected)) {
 654                         $selected[] = 'internal-activity';
 655                 }
 656
 657                 $selection = [];
 658                 foreach ($fields as $table => $table_fields) {
 659                         foreach ($table_fields as $field => $select) {
 660                                 if (empty($selected) || in_array($select, $selected)) {
 661                                         if (self::isLegacyMode() && in_array($select, self::MIXED_CONTENT_FIELDLIST)) {
 662                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 663                                         }
 664                                         if (is_int($field)) {
 665                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 666                                         } else {
 667                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 668                                         }
 669                                 }
 670                         }
 671                 }
 672                 return implode(", ", $selection);
 673         }
 674
 675         /**
 676          * @brief add table definition to fields in an SQL query
 677          *
 678          * @param string $query SQL query
 679          * @param array $fields The field definition array
 680          *
 681          * @return string the changed SQL query
 682          */
 683         private static function addTablesToFields($query, $fields)
 684         {
 685                 foreach ($fields as $table => $table_fields) {
 686                         foreach ($table_fields as $alias => $field) {
 687                                 if (is_int($alias)) {
 688                                         $replace_field = $field;
 689                                 } else {
 690                                         $replace_field = $alias;
 691                                 }
 692
 693                                 $search = "/([^\.])`" . $field . "`/i";
 694                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 695                                 $query = preg_replace($search, $replace, $query);
 696                         }
 697                 }
 698                 return $query;
 699         }
 700
 701         /**
 702          * @brief Generate a server unique item hash for linking between the item tables
 703          *
 704          * @param string $uri     Item URI
 705          * @param date   $created Item creation date
 706          *
 707          * @return string the item hash
 708          */
 709         private static function itemHash($uri, $created)
 710         {
 711                 return round(strtotime($created) / 100) . hash('ripemd128', $uri);
 712         }
 713
 714         /**
 715          * @brief Update existing item entries
 716          *
 717          * @param array $fields The fields that are to be changed
 718          * @param array $condition The condition for finding the item entries
 719          *
 720          * In the future we may have to change permissions as well.
 721          * Then we had to add the user id as third parameter.
 722          *
 723          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 724          *
 725          * @return integer|boolean number of affected rows - or "false" if there was an error
 726          */
 727         public static function update(array $fields, array $condition)
 728         {
 729                 if (empty($condition) || empty($fields)) {
 730                         return false;
 731                 }
 732
 733                 // To ensure the data integrity we do it in an transaction
 734                 dba::transaction();
 735
 736                 // We cannot simply expand the condition to check for origin entries
 737                 // The condition needn't to be a simple array but could be a complex condition.
 738                 // And we have to execute this query before the update to ensure to fetch the same data.
 739                 $items = dba::select('item', ['id', 'origin', 'uri', 'created', 'uri-hash', 'iaid', 'icid', 'tag', 'file'], $condition);
 740
 741                 $content_fields = [];
 742                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 743                         if (isset($fields[$field])) {
 744                                 $content_fields[$field] = $fields[$field];
 745                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 746                                         unset($fields[$field]);
 747                                 } else {
 748                                         $fields[$field] = null;
 749                                 }
 750                         }
 751                 }
 752
 753                 $author_owner_fields = ['author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link'];
 754                 foreach ($author_owner_fields as $field) {
 755                         if (array_key_exists($field, $fields)) {
 756                                 $fields[$field] = null;
 757                         }
 758                 }
 759
 760                 if (array_key_exists('tag', $fields)) {
 761                         $tags = $fields['tag'];
 762                         $fields['tag'] = null;
 763                 } else {
 764                         $tags = '';
 765                 }
 766
 767                 if (array_key_exists('file', $fields)) {
 768                         $files = $fields['file'];
 769                         $fields['file'] = null;
 770                 } else {
 771                         $files = '';
 772                 }
 773
 774                 if (!empty($fields)) {
 775                         $success = dba::update('item', $fields, $condition);
 776
 777                         if (!$success) {
 778                                 dba::close($items);
 779                                 dba::rollback();
 780                                 return false;
 781                         }
 782                 }
 783
 784                 // When there is no content for the "old" item table, this will count the fetched items
 785                 $rows = dba::affected_rows();
 786
 787                 while ($item = dba::fetch($items)) {
 788                         // This part here can safely be removed when the legacy fields in the item had been removed
 789                         if (empty($item['uri-hash']) && !empty($item['uri']) && !empty($item['created'])) {
 790
 791                                 // Fetch the uri-hash from an existing item entry if there is one
 792                                 $item_condition = ["`uri` = ? AND `uri-hash` != ''", $item['uri']];
 793                                 $existing = dba::selectfirst('item', ['uri-hash'], $item_condition);
 794                                 if (DBM::is_result($existing)) {
 795                                         $item['uri-hash'] = $existing['uri-hash'];
 796                                 } else {
 797                                         $item['uri-hash'] = self::itemHash($item['uri'], $item['created']);
 798                                 }
 799
 800                                 dba::update('item', ['uri-hash' => $item['uri-hash']], ['id' => $item['id']]);
 801                                 dba::update('item-activity', ['uri-hash' => $item['uri-hash']], ["`uri` = ? AND `uri-hash` = ''", $item['uri']]);
 802                                 dba::update('item-content', ['uri-plink-hash' => $item['uri-hash']], ["`uri` = ? AND `uri-plink-hash` = ''", $item['uri']]);
 803                         }
 804
 805                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 806                                 if (!empty($item['iaid'])) {
 807                                         $update_condition = ['id' => $item['iaid']];
 808                                 } else {
 809                                         $update_condition = ['uri-hash' => $item['uri-hash']];
 810                                 }
 811                                 self::updateActivity($content_fields, $update_condition);
 812
 813                                 if (empty($item['iaid'])) {
 814                                         $item_activity = dba::selectFirst('item-activity', ['id'], ['uri-hash' => $item['uri-hash']]);
 815                                         if (DBM::is_result($item_activity)) {
 816                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 817                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 818                                                         if (self::isLegacyMode()) {
 819                                                                 $item_fields[$field] = null;
 820                                                         } else {
 821                                                                 unset($item_fields[$field]);
 822                                                         }
 823                                                 }
 824                                                 dba::update('item', $item_fields, ['id' => $item['id']]);
 825
 826                                                 if (!empty($item['icid']) && !dba::exists('item', ['icid' => $item['icid']])) {
 827                                                         dba::delete('item-content', ['id' => $item['icid']]);
 828                                                 }
 829                                         }
 830                                 } elseif (!empty($item['icid'])) {
 831                                         dba::update('item', ['icid' => null], ['id' => $item['id']]);
 832
 833                                         if (!dba::exists('item', ['icid' => $item['icid']])) {
 834                                                 dba::delete('item-content', ['id' => $item['icid']]);
 835                                         }
 836                                 }
 837                         } else {
 838                                 if (!empty($item['icid'])) {
 839                                         $update_condition = ['id' => $item['icid']];
 840                                 } else {
 841                                         $update_condition = ['uri-plink-hash' => $item['uri-hash']];
 842                                 }
 843                                 self::updateContent($content_fields, $update_condition);
 844
 845                                 if (empty($item['icid'])) {
 846                                         $item_content = dba::selectFirst('item-content', [], ['uri-plink-hash' => $item['uri-hash']]);
 847                                         if (DBM::is_result($item_content)) {
 848                                                 $item_fields = ['icid' => $item_content['id']];
 849                                                 // Clear all fields in the item table that have a content in the item-content table
 850                                                 foreach ($item_content as $field => $content) {
 851                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
 852                                                                 if (self::isLegacyMode()) {
 853                                                                         $item_fields[$field] = null;
 854                                                                 } else {
 855                                                                         unset($item_fields[$field]);
 856                                                                 }
 857                                                         }
 858                                                 }
 859                                                 dba::update('item', $item_fields, ['id' => $item['id']]);
 860                                         }
 861                                 }
 862                         }
 863
 864                         if (!empty($tags)) {
 865                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
 866                                 if (!empty($item['tag'])) {
 867                                         dba::update('item', ['tag' => ''], ['id' => $item['id']]);
 868                                 }
 869                         }
 870
 871                         if (!empty($files)) {
 872                                 Term::insertFromFileFieldByItemId($item['id'], $files);
 873                                 if (!empty($item['file'])) {
 874                                         dba::update('item', ['file' => ''], ['id' => $item['id']]);
 875                                 }
 876                         }
 877
 878                         self::updateThread($item['id']);
 879
 880                         // We only need to notfiy others when it is an original entry from us.
 881                         // Only call the notifier when the item has some content relevant change.
 882                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 883                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 884                         }
 885                 }
 886
 887                 dba::close($items);
 888                 dba::commit();
 889                 return $rows;
 890         }
 891
 892         /**
 893          * @brief Delete an item and notify others about it - if it was ours
 894          *
 895          * @param array $condition The condition for finding the item entries
 896          * @param integer $priority Priority for the notification
 897          */
 898         public static function delete($condition, $priority = PRIORITY_HIGH)
 899         {
 900                 $items = dba::select('item', ['id'], $condition);
 901                 while ($item = dba::fetch($items)) {
 902                         self::deleteById($item['id'], $priority);
 903                 }
 904                 dba::close($items);
 905         }
 906
 907         /**
 908          * @brief Delete an item for an user and notify others about it - if it was ours
 909          *
 910          * @param array $condition The condition for finding the item entries
 911          * @param integer $uid User who wants to delete this item
 912          */
 913         public static function deleteForUser($condition, $uid)
 914         {
 915                 if ($uid == 0) {
 916                         return;
 917                 }
 918
 919                 $items = dba::select('item', ['id', 'uid'], $condition);
 920                 while ($item = dba::fetch($items)) {
 921                         // "Deleting" global items just means hiding them
 922                         if ($item['uid'] == 0) {
 923                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 924                         } elseif ($item['uid'] == $uid) {
 925                                 self::deleteById($item['id'], PRIORITY_HIGH);
 926                         } else {
 927                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 928                         }
 929                 }
 930                 dba::close($items);
 931         }
 932
 933         /**
 934          * @brief Delete an item and notify others about it - if it was ours
 935          *
 936          * @param integer $item_id Item ID that should be delete
 937          * @param integer $priority Priority for the notification
 938          *
 939          * @return boolean success
 940          */
 941         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 942         {
 943                 // locate item to be deleted
 944                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 945                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 946                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 947                 $item = self::selectFirst($fields, ['id' => $item_id]);
 948                 if (!DBM::is_result($item)) {
 949                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 950                         return false;
 951                 }
 952
 953                 if ($item['deleted']) {
 954                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 955                         return false;
 956                 }
 957
 958                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
 959                 if (!DBM::is_result($parent)) {
 960                         $parent = ['origin' => false];
 961                 }
 962
 963                 // clean up categories and tags so they don't end up as orphans
 964
 965                 $matches = false;
 966                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 967                 if ($cnt) {
 968                         foreach ($matches as $mtch) {
 969                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 970                         }
 971                 }
 972
 973                 $matches = false;
 974
 975                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 976                 if ($cnt) {
 977                         foreach ($matches as $mtch) {
 978                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 979                         }
 980                 }
 981
 982                 /*
 983                  * If item is a link to a photo resource, nuke all the associated photos
 984                  * (visitors will not have photo resources)
 985                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 986                  * generate a resource-id and therefore aren't intimately linked to the item.
 987                  */
 988                 if (strlen($item['resource-id'])) {
 989                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 990                 }
 991
 992                 // If item is a link to an event, delete the event.
 993                 if (intval($item['event-id'])) {
 994                         Event::delete($item['event-id']);
 995                 }
 996
 997                 // If item has attachments, drop them
 998                 foreach (explode(", ", $item['attach']) as $attach) {
 999                         preg_match("|attach/(\d+)|", $attach, $matches);
1000                         if (is_array($matches) && count($matches) > 1) {
1001                                 dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
1002                         }
1003                 }
1004
1005                 // Delete tags that had been attached to other items
1006                 self::deleteTagsFromItem($item);
1007
1008                 // Set the item to "deleted"
1009                 // This erasing of item content is superfluous for items with a matching item-content.
1010                 // But for the next time we will still have old content in the item table.
1011                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow(),
1012                         'body' => '', 'title' => '', 'content-warning' => '', 'rendered-hash' => '', 'rendered-html' => '',
1013                         'object' => '', 'target' => '', 'tag' => '', 'postopts' => '', 'attach' => '', 'file' => ''];
1014                 dba::update('item', $item_fields, ['id' => $item['id']]);
1015
1016                 Term::insertFromTagFieldByItemId($item['id'], '');
1017                 Term::insertFromFileFieldByItemId($item['id'], '');
1018                 self::deleteThread($item['id'], $item['parent-uri']);
1019
1020                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1021                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1022                 }
1023
1024                 // If it's the parent of a comment thread, kill all the kids
1025                 if ($item['id'] == $item['parent']) {
1026                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1027                 }
1028
1029                 // Is it our comment and/or our thread?
1030                 if ($item['origin'] || $parent['origin']) {
1031
1032                         // When we delete the original post we will delete all existing copies on the server as well
1033                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1034
1035                         // send the notification upstream/downstream
1036                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
1037                 } elseif ($item['uid'] != 0) {
1038
1039                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1040                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1041                         if (DBM::is_result($global_item)) {
1042                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1043                         }
1044                 }
1045
1046                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
1047
1048                 return true;
1049         }
1050
1051         private static function deleteTagsFromItem($item)
1052         {
1053                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
1054                         return;
1055                 }
1056
1057                 $xo = XML::parseString($item["object"], false);
1058                 $xt = XML::parseString($item["target"], false);
1059
1060                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
1061                         return;
1062                 }
1063
1064                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1065                 if (!DBM::is_result($i)) {
1066                         return;
1067                 }
1068
1069                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1070                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1071                 $author_copy = $item["origin"];
1072
1073                 if (($owner_remove && $author_copy) || !$owner_remove) {
1074                         return;
1075                 }
1076
1077                 $tags = explode(',', $i["tag"]);
1078                 $newtags = [];
1079                 if (count($tags)) {
1080                         foreach ($tags as $tag) {
1081                                 if (trim($tag) !== trim($xo->body)) {
1082                                        $newtags[] = trim($tag);
1083                                 }
1084                         }
1085                 }
1086                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1087         }
1088
1089         private static function guid($item, $notify)
1090         {
1091                 if (!empty($item['guid'])) {
1092                         return notags(trim($item['guid']));
1093                 }
1094
1095                 if ($notify) {
1096                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1097                         // We add the hash of our own host because our host is the original creator of the post.
1098                         $prefix_host = get_app()->get_hostname();
1099                 } else {
1100                         $prefix_host = '';
1101
1102                         // We are only storing the post so we create a GUID from the original hostname.
1103                         if (!empty($item['author-link'])) {
1104                                 $parsed = parse_url($item['author-link']);
1105                                 if (!empty($parsed['host'])) {
1106                                         $prefix_host = $parsed['host'];
1107                                 }
1108                         }
1109
1110                         if (empty($prefix_host) && !empty($item['plink'])) {
1111                                 $parsed = parse_url($item['plink']);
1112                                 if (!empty($parsed['host'])) {
1113                                         $prefix_host = $parsed['host'];
1114                                 }
1115                         }
1116
1117                         if (empty($prefix_host) && !empty($item['uri'])) {
1118                                 $parsed = parse_url($item['uri']);
1119                                 if (!empty($parsed['host'])) {
1120                                         $prefix_host = $parsed['host'];
1121                                 }
1122                         }
1123
1124                         // Is it in the format data@host.tld? - Used for mail contacts
1125                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1126                                 $mailparts = explode('@', $item['author-link']);
1127                                 $prefix_host = array_pop($mailparts);
1128                         }
1129                 }
1130
1131                 if (!empty($item['plink'])) {
1132                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1133                 } elseif (!empty($item['uri'])) {
1134                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1135                 } else {
1136                         $guid = System::createGUID(32, hash('crc32', $prefix_host));
1137                 }
1138
1139                 return $guid;
1140         }
1141
1142         private static function contactId($item)
1143         {
1144                 $contact_id = (int)$item["contact-id"];
1145
1146                 if (!empty($contact_id)) {
1147                         return $contact_id;
1148                 }
1149                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
1150                 /*
1151                  * First we are looking for a suitable contact that matches with the author of the post
1152                  * This is done only for comments
1153                  */
1154                 if ($item['parent-uri'] != $item['uri']) {
1155                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1156                 }
1157
1158                 // If not present then maybe the owner was found
1159                 if ($contact_id == 0) {
1160                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
1161                 }
1162
1163                 // Still missing? Then use the "self" contact of the current user
1164                 if ($contact_id == 0) {
1165                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
1166                         if (DBM::is_result($self)) {
1167                                 $contact_id = $self["id"];
1168                         }
1169                 }
1170                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
1171
1172                 return $contact_id;
1173         }
1174
1175         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1176         {
1177                 $a = get_app();
1178
1179                 // If it is a posting where users should get notifications, then define it as wall posting
1180                 if ($notify) {
1181                         $item['wall'] = 1;
1182                         $item['type'] = 'wall';
1183                         $item['origin'] = 1;
1184                         $item['network'] = NETWORK_DFRN;
1185                         $item['protocol'] = PROTOCOL_DFRN;
1186
1187                         if (is_int($notify)) {
1188                                 $priority = $notify;
1189                         } else {
1190                                 $priority = PRIORITY_HIGH;
1191                         }
1192                 } else {
1193                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
1194                 }
1195
1196                 $item['guid'] = self::guid($item, $notify);
1197                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
1198
1199                 // Store conversation data
1200                 $item = Conversation::insert($item);
1201
1202                 /*
1203                  * If a Diaspora signature structure was passed in, pull it out of the
1204                  * item array and set it aside for later storage.
1205                  */
1206
1207                 $dsprsig = null;
1208                 if (x($item, 'dsprsig')) {
1209                         $encoded_signature = $item['dsprsig'];
1210                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1211                         unset($item['dsprsig']);
1212                 }
1213
1214                 if (!empty($item['diaspora_signed_text'])) {
1215                         $diaspora_signed_text = $item['diaspora_signed_text'];
1216                         unset($item['diaspora_signed_text']);
1217                 } else {
1218                         $diaspora_signed_text = '';
1219                 }
1220
1221                 // Converting the plink
1222                 /// @TODO Check if this is really still needed
1223                 if ($item['network'] == NETWORK_OSTATUS) {
1224                         if (isset($item['plink'])) {
1225                                 $item['plink'] = OStatus::convertHref($item['plink']);
1226                         } elseif (isset($item['uri'])) {
1227                                 $item['plink'] = OStatus::convertHref($item['uri']);
1228                         }
1229                 }
1230
1231                 if (!empty($item['thr-parent'])) {
1232                         $item['parent-uri'] = $item['thr-parent'];
1233                 }
1234
1235                 $item['type'] = defaults($item, 'type', 'remote');
1236
1237                 if (isset($item['gravity'])) {
1238                         $item['gravity'] = intval($item['gravity']);
1239                 } elseif ($item['parent-uri'] === $item['uri']) {
1240                         $item['gravity'] = GRAVITY_PARENT;
1241                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1242                         $item['gravity'] = GRAVITY_COMMENT;
1243                 } elseif ($item['type'] == 'activity') {
1244                         $item['gravity'] = GRAVITY_ACTIVITY;
1245                 } else {
1246                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1247                         logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
1248                 }
1249
1250                 $uid = intval($item['uid']);
1251
1252                 // check for create date and expire time
1253                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1254
1255                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
1256                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1257                         $expire_interval = $user['expire'];
1258                 }
1259
1260                 if (($expire_interval > 0) && !empty($item['created'])) {
1261                         $expire_date = time() - ($expire_interval * 86400);
1262                         $created_date = strtotime($item['created']);
1263                         if ($created_date < $expire_date) {
1264                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
1265                                 return 0;
1266                         }
1267                 }
1268
1269                 /*
1270                  * Do we already have this item?
1271                  * We have to check several networks since Friendica posts could be repeated
1272                  * via OStatus (maybe Diasporsa as well)
1273                  */
1274                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
1275                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1276                                 trim($item['uri']), $item['uid'],
1277                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
1278                         $existing = self::selectFirst(['id', 'network'], $condition);
1279                         if (DBM::is_result($existing)) {
1280                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1281                                 if ($uid != 0) {
1282                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
1283                                 }
1284
1285                                 return $existing["id"];
1286                         }
1287                 }
1288
1289                 // Ensure to always have the same creation date.
1290                 $existing = dba::selectfirst('item', ['created', 'uri-hash'], ['uri' => $item['uri']]);
1291                 if (DBM::is_result($existing)) {
1292                         $item['created'] = $existing['created'];
1293                         $item['uri-hash'] = $existing['uri-hash'];
1294                 }
1295
1296                 self::addLanguageToItemArray($item);
1297
1298                 $item['wall']          = intval(defaults($item, 'wall', 0));
1299                 $item['extid']         = trim(defaults($item, 'extid', ''));
1300                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1301                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1302                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1303                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1304                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1305                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1306                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1307                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1308                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1309                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1310                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1311                 $item['title']         = trim(defaults($item, 'title', ''));
1312                 $item['location']      = trim(defaults($item, 'location', ''));
1313                 $item['coord']         = trim(defaults($item, 'coord', ''));
1314                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1315                 $item['deleted']       = 0;
1316                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1317                 $item['verb']          = trim(defaults($item, 'verb', ''));
1318                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1319                 $item['object']        = trim(defaults($item, 'object', ''));
1320                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1321                 $item['target']        = trim(defaults($item, 'target', ''));
1322                 $item['plink']         = trim(defaults($item, 'plink', ''));
1323                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1324                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1325                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1326                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1327                 $item['private']       = intval(defaults($item, 'private', 0));
1328                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1329                 $item['body']          = trim(defaults($item, 'body', ''));
1330                 $item['tag']           = trim(defaults($item, 'tag', ''));
1331                 $item['attach']        = trim(defaults($item, 'attach', ''));
1332                 $item['app']           = trim(defaults($item, 'app', ''));
1333                 $item['origin']        = intval(defaults($item, 'origin', 0));
1334                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1335                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1336                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1337                 $item['inform']        = trim(defaults($item, 'inform', ''));
1338                 $item['file']          = trim(defaults($item, 'file', ''));
1339
1340                 // Unique identifier to be linked against item-activities and item-content
1341                 $item['uri-hash']      = defaults($item, 'uri-hash', self::itemHash($item['uri'], $item['created']));
1342
1343                 // When there is no content then we don't post it
1344                 if ($item['body'].$item['title'] == '') {
1345                         logger('No body, no title.');
1346                         return 0;
1347                 }
1348
1349                 // Items cannot be stored before they happen ...
1350                 if ($item['created'] > DateTimeFormat::utcNow()) {
1351                         $item['created'] = DateTimeFormat::utcNow();
1352                 }
1353
1354                 // We haven't invented time travel by now.
1355                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1356                         $item['edited'] = DateTimeFormat::utcNow();
1357                 }
1358
1359                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1360
1361                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1362                 $item["contact-id"] = self::contactId($item);
1363
1364                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1365                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1366
1367                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1368
1369                 if (Contact::isBlocked($item["author-id"])) {
1370                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1371                         return 0;
1372                 }
1373
1374                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1375                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1376
1377                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1378
1379                 if (Contact::isBlocked($item["owner-id"])) {
1380                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1381                         return 0;
1382                 }
1383
1384                 // These fields aren't stored anymore in the item table, they are fetched upon request
1385                 unset($item['author-link']);
1386                 unset($item['author-name']);
1387                 unset($item['author-avatar']);
1388
1389                 unset($item['owner-link']);
1390                 unset($item['owner-name']);
1391                 unset($item['owner-avatar']);
1392
1393                 if ($item['network'] == NETWORK_PHANTOM) {
1394                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1395
1396                         $item['network'] = NETWORK_DFRN;
1397                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1398                 }
1399
1400                 // Checking if there is already an item with the same guid
1401                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1402                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1403                 if (self::exists($condition)) {
1404                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1405                         return 0;
1406                 }
1407
1408                 // Check for hashtags in the body and repair or add hashtag links
1409                 self::setHashtags($item);
1410
1411                 $item['thr-parent'] = $item['parent-uri'];
1412
1413                 $notify_type = '';
1414                 $allow_cid = '';
1415                 $allow_gid = '';
1416                 $deny_cid  = '';
1417                 $deny_gid  = '';
1418
1419                 if ($item['parent-uri'] === $item['uri']) {
1420                         $parent_id = 0;
1421                         $parent_deleted = 0;
1422                         $allow_cid = $item['allow_cid'];
1423                         $allow_gid = $item['allow_gid'];
1424                         $deny_cid  = $item['deny_cid'];
1425                         $deny_gid  = $item['deny_gid'];
1426                         $notify_type = 'wall-new';
1427                 } else {
1428                         // find the parent and snarf the item id and ACLs
1429                         // and anything else we need to inherit
1430
1431                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1432                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1433                                 'wall', 'private', 'forum_mode', 'origin'];
1434                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1435                         $params = ['order' => ['id' => false]];
1436                         $parent = self::selectFirst($fields, $condition, $params);
1437
1438                         if (DBM::is_result($parent)) {
1439                                 // is the new message multi-level threaded?
1440                                 // even though we don't support it now, preserve the info
1441                                 // and re-attach to the conversation parent.
1442
1443                                 if ($parent['uri'] != $parent['parent-uri']) {
1444                                         $item['parent-uri'] = $parent['parent-uri'];
1445
1446                                         $condition = ['uri' => $item['parent-uri'],
1447                                                 'parent-uri' => $item['parent-uri'],
1448                                                 'uid' => $item['uid']];
1449                                         $params = ['order' => ['id' => false]];
1450                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1451
1452                                         if (DBM::is_result($toplevel_parent)) {
1453                                                 $parent = $toplevel_parent;
1454                                         }
1455                                 }
1456
1457                                 $parent_id      = $parent['id'];
1458                                 $parent_deleted = $parent['deleted'];
1459                                 $allow_cid      = $parent['allow_cid'];
1460                                 $allow_gid      = $parent['allow_gid'];
1461                                 $deny_cid       = $parent['deny_cid'];
1462                                 $deny_gid       = $parent['deny_gid'];
1463                                 $item['wall']    = $parent['wall'];
1464                                 $notify_type    = 'comment-new';
1465
1466                                 /*
1467                                  * If the parent is private, force privacy for the entire conversation
1468                                  * This differs from the above settings as it subtly allows comments from
1469                                  * email correspondents to be private even if the overall thread is not.
1470                                  */
1471                                 if ($parent['private']) {
1472                                         $item['private'] = $parent['private'];
1473                                 }
1474
1475                                 /*
1476                                  * Edge case. We host a public forum that was originally posted to privately.
1477                                  * The original author commented, but as this is a comment, the permissions
1478                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1479                                  */
1480                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1481                                         $item['private'] = 0;
1482                                 }
1483
1484                                 // If its a post from myself then tag the thread as "mention"
1485                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1486                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1487                                 if (DBM::is_result($user)) {
1488                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1489                                         $self_id = Contact::getIdForURL($self, 0, true);
1490                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1491                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1492                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1493                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1494                                         }
1495                                 }
1496                         } else {
1497                                 /*
1498                                  * Allow one to see reply tweets from status.net even when
1499                                  * we don't have or can't see the original post.
1500                                  */
1501                                 if ($force_parent) {
1502                                         logger('$force_parent=true, reply converted to top-level post.');
1503                                         $parent_id = 0;
1504                                         $item['parent-uri'] = $item['uri'];
1505                                         $item['gravity'] = GRAVITY_PARENT;
1506                                 } else {
1507                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1508                                         return 0;
1509                                 }
1510
1511                                 $parent_deleted = 0;
1512                         }
1513                 }
1514
1515                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1516                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1517                 if (self::exists($condition)) {
1518                         logger('duplicated item with the same uri found. '.print_r($item,true));
1519                         return 0;
1520                 }
1521
1522                 // On Friendica and Diaspora the GUID is unique
1523                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1524                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1525                         if (self::exists($condition)) {
1526                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1527                                 return 0;
1528                         }
1529                 } else {
1530                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1531                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1532                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1533                         if (self::exists($condition)) {
1534                                 logger('duplicated item with the same body found. '.print_r($item,true));
1535                                 return 0;
1536                         }
1537                 }
1538
1539                 // Is this item available in the global items (with uid=0)?
1540                 if ($item["uid"] == 0) {
1541                         $item["global"] = true;
1542
1543                         // Set the global flag on all items if this was a global item entry
1544                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1545                 } else {
1546                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1547                 }
1548
1549                 // ACL settings
1550                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1551                         $private = 1;
1552                 } else {
1553                         $private = $item['private'];
1554                 }
1555
1556                 $item["allow_cid"] = $allow_cid;
1557                 $item["allow_gid"] = $allow_gid;
1558                 $item["deny_cid"] = $deny_cid;
1559                 $item["deny_gid"] = $deny_gid;
1560                 $item["private"] = $private;
1561                 $item["deleted"] = $parent_deleted;
1562
1563                 // Fill the cache field
1564                 put_item_in_cache($item);
1565
1566                 if ($notify) {
1567                         $item['edit'] = false;
1568                         $item['parent'] = $parent_id;
1569                         Addon::callHooks('post_local', $item);
1570                         unset($item['edit']);
1571                         unset($item['parent']);
1572                 } else {
1573                         Addon::callHooks('post_remote', $item);
1574                 }
1575
1576                 // This array field is used to trigger some automatic reactions
1577                 // It is mainly used in the "post_local" hook.
1578                 unset($item['api_source']);
1579
1580                 if (x($item, 'cancel')) {
1581                         logger('post cancelled by addon.');
1582                         return 0;
1583                 }
1584
1585                 /*
1586                  * Check for already added items.
1587                  * There is a timing issue here that sometimes creates double postings.
1588                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1589                  */
1590                 if ($item["uid"] == 0) {
1591                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1592                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1593                                 return 0;
1594                         }
1595                 }
1596
1597                 logger('' . print_r($item,true), LOGGER_DATA);
1598
1599                 if (array_key_exists('tag', $item)) {
1600                         $tags = $item['tag'];
1601                         unset($item['tag']);
1602                 } else {
1603                         $tags = '';
1604                 }
1605
1606                 if (array_key_exists('file', $item)) {
1607                         $files = $item['file'];
1608                         unset($item['file']);
1609                 } else {
1610                         $files = '';
1611                 }
1612
1613                 // We are doing this outside of the transaction to avoid timing problems
1614                 if (!self::insertActivity($item)) {
1615                         self::insertContent($item);
1616                 }
1617
1618                 dba::transaction();
1619                 $ret = dba::insert('item', $item);
1620
1621                 // When the item was successfully stored we fetch the ID of the item.
1622                 if (DBM::is_result($ret)) {
1623                         $current_post = dba::lastInsertId();
1624                 } else {
1625                         // This can happen - for example - if there are locking timeouts.
1626                         dba::rollback();
1627
1628                         // Store the data into a spool file so that we can try again later.
1629
1630                         // At first we restore the Diaspora signature that we removed above.
1631                         if (isset($encoded_signature)) {
1632                                 $item['dsprsig'] = $encoded_signature;
1633                         }
1634
1635                         // Now we store the data in the spool directory
1636                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1637                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1638
1639                         $spoolpath = get_spoolpath();
1640                         if ($spoolpath != "") {
1641                                 $spool = $spoolpath.'/'.$file;
1642                                 file_put_contents($spool, json_encode($item));
1643                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1644                         }
1645                         return 0;
1646                 }
1647
1648                 if ($current_post == 0) {
1649                         // This is one of these error messages that never should occur.
1650                         logger("couldn't find created item - we better quit now.");
1651                         dba::rollback();
1652                         return 0;
1653                 }
1654
1655                 // How much entries have we created?
1656                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1657                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1658
1659                 if ($entries > 1) {
1660                         // There are duplicates. We delete our just created entry.
1661                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1662
1663                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1664                         dba::delete('item', ['id' => $current_post]);
1665                         dba::commit();
1666                         return 0;
1667                 } elseif ($entries == 0) {
1668                         // This really should never happen since we quit earlier if there were problems.
1669                         logger("Something is terribly wrong. We haven't found our created entry.");
1670                         dba::rollback();
1671                         return 0;
1672                 }
1673
1674                 logger('created item '.$current_post);
1675                 self::updateContact($item);
1676
1677                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1678                         $parent_id = $current_post;
1679                 }
1680
1681                 // Set parent id
1682                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1683
1684                 $item['id'] = $current_post;
1685                 $item['parent'] = $parent_id;
1686
1687                 // update the commented timestamp on the parent
1688                 // Only update "commented" if it is really a comment
1689                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1690                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1691                 } else {
1692                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1693                 }
1694
1695                 if ($dsprsig) {
1696                         /*
1697                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1698                          * We can check for this condition when we decode and encode the stuff again.
1699                          */
1700                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1701                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1702                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1703                         }
1704
1705                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1706                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1707                 }
1708
1709                 if (!empty($diaspora_signed_text)) {
1710                         // Formerly we stored the signed text, the signature and the author in different fields.
1711                         // We now store the raw data so that we are more flexible.
1712                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1713                 }
1714
1715                 $deleted = self::tagDeliver($item['uid'], $current_post);
1716
1717                 /*
1718                  * current post can be deleted if is for a community page and no mention are
1719                  * in it.
1720                  */
1721                 if (!$deleted && !$dontcache) {
1722                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1723                         if (DBM::is_result($posted_item)) {
1724                                 if ($notify) {
1725                                         Addon::callHooks('post_local_end', $posted_item);
1726                                 } else {
1727                                         Addon::callHooks('post_remote_end', $posted_item);
1728                                 }
1729                         } else {
1730                                 logger('new item not found in DB, id ' . $current_post);
1731                         }
1732                 }
1733
1734                 if ($item['parent-uri'] === $item['uri']) {
1735                         self::addThread($current_post);
1736                 } else {
1737                         self::updateThread($parent_id);
1738                 }
1739
1740                 dba::commit();
1741
1742                 /*
1743                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1744                  * This is not perfect - but a workable solution until we found the reason for the problem.
1745                  */
1746                 if (!empty($tags)) {
1747                         Term::insertFromTagFieldByItemId($current_post, $tags);
1748                 }
1749
1750                 if (!empty($files)) {
1751                         Term::insertFromFileFieldByItemId($current_post, $files);
1752                 }
1753
1754                 if ($item['parent-uri'] === $item['uri']) {
1755                         self::addShadow($current_post);
1756                 } else {
1757                         self::addShadowPost($current_post);
1758                 }
1759
1760                 check_user_notification($current_post);
1761
1762                 if ($notify) {
1763                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1764                 } elseif (!empty($parent) && $parent['origin']) {
1765                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1766                 }
1767
1768                 return $current_post;
1769         }
1770
1771         /**
1772          * @brief Insert a new item content entry
1773          *
1774          * @param array $item The item fields that are to be inserted
1775          */
1776         private static function insertActivity(&$item)
1777         {
1778                 $activity_index = self::activityToIndex($item['verb']);
1779
1780                 if ($activity_index < 0) {
1781                         return false;
1782                 }
1783
1784                 $fields = ['uri' => $item['uri'], 'activity' => $activity_index,
1785                         'uri-hash' => $item['uri-hash']];
1786
1787                 // We just remove everything that is content
1788                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1789                         unset($item[$field]);
1790                 }
1791
1792                 // To avoid timing problems, we are using locks.
1793                 $locked = Lock::acquire('item_insert_activity');
1794                 if (!$locked) {
1795                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1796                 }
1797
1798                 // Do we already have this content?
1799                 $item_activity = dba::selectFirst('item-activity', ['id'], ['uri-hash' => $item['uri-hash']]);
1800                 if (DBM::is_result($item_activity)) {
1801                         $item['iaid'] = $item_activity['id'];
1802                         logger('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1803                 } elseif (dba::insert('item-activity', $fields)) {
1804                         $item['iaid'] = dba::lastInsertId();
1805                         logger('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1806                 } else {
1807                         // This shouldn't happen.
1808                         logger('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
1809                         return false;
1810                 }
1811                 if ($locked) {
1812                         Lock::release('item_insert_activity');
1813                 }
1814                 return true;
1815         }
1816
1817         /**
1818          * @brief Insert a new item content entry
1819          *
1820          * @param array $item The item fields that are to be inserted
1821          */
1822         private static function insertContent(&$item)
1823         {
1824                 $fields = ['uri' => $item['uri'], 'uri-plink-hash' => $item['uri-hash']];
1825
1826                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1827                         if (isset($item[$field])) {
1828                                 $fields[$field] = $item[$field];
1829                                 unset($item[$field]);
1830                         }
1831                 }
1832
1833                 // To avoid timing problems, we are using locks.
1834                 $locked = Lock::acquire('item_insert_content');
1835                 if (!$locked) {
1836                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1837                 }
1838
1839                 // Do we already have this content?
1840                 $item_content = dba::selectFirst('item-content', ['id'], ['uri-plink-hash' => $item['uri-hash']]);
1841                 if (DBM::is_result($item_content)) {
1842                         $item['icid'] = $item_content['id'];
1843                         logger('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1844                 } elseif (dba::insert('item-content', $fields)) {
1845                         $item['icid'] = dba::lastInsertId();
1846                         logger('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1847                 } else {
1848                         // This shouldn't happen.
1849                         logger('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
1850                 }
1851                 if ($locked) {
1852                         Lock::release('item_insert_content');
1853                 }
1854         }
1855
1856         /**
1857          * @brief Update existing item content entries
1858          *
1859          * @param array $item The item fields that are to be changed
1860          * @param array $condition The condition for finding the item content entries
1861          */
1862         private static function updateActivity($item, $condition)
1863         {
1864                 if (empty($item['verb'])) {
1865                         return false;
1866                 }
1867                 $activity_index = self::activityToIndex($item['verb']);
1868
1869                 if ($activity_index < 0) {
1870                         return false;
1871                 }
1872
1873                 $fields = ['activity' => $activity_index];
1874
1875                 logger('Update activity for ' . json_encode($condition));
1876
1877                 dba::update('item-activity', $fields, $condition, true);
1878
1879                 return true;
1880         }
1881
1882         /**
1883          * @brief Update existing item content entries
1884          *
1885          * @param array $item The item fields that are to be changed
1886          * @param array $condition The condition for finding the item content entries
1887          */
1888         private static function updateContent($item, $condition)
1889         {
1890                 // We have to select only the fields from the "item-content" table
1891                 $fields = [];
1892                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1893                         if (isset($item[$field])) {
1894                                 $fields[$field] = $item[$field];
1895                         }
1896                 }
1897
1898                 if (empty($fields)) {
1899                         // when there are no fields at all, just use the condition
1900                         // This is to ensure that we always store content.
1901                         $fields = $condition;
1902                 }
1903
1904                 logger('Update content for ' . json_encode($condition));
1905
1906                 dba::update('item-content', $fields, $condition, true);
1907         }
1908
1909         /**
1910          * @brief Distributes public items to the receivers
1911          *
1912          * @param integer $itemid      Item ID that should be added
1913          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1914          */
1915         public static function distribute($itemid, $signed_text = '')
1916         {
1917                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1918                 $parent = self::selectFirst(['owner-id'], $condition);
1919                 if (!DBM::is_result($parent)) {
1920                         return;
1921                 }
1922
1923                 // Only distribute public items from native networks
1924                 $condition = ['id' => $itemid, 'uid' => 0,
1925                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1926                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1927                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1928                 if (!DBM::is_result($item)) {
1929                         return;
1930                 }
1931
1932                 $origin = $item['origin'];
1933
1934                 unset($item['id']);
1935                 unset($item['parent']);
1936                 unset($item['mention']);
1937                 unset($item['wall']);
1938                 unset($item['origin']);
1939                 unset($item['starred']);
1940
1941                 $users = [];
1942
1943                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1944                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1945                 $contacts = dba::select('contact', ['uid'], $condition);
1946                 while ($contact = dba::fetch($contacts)) {
1947                         $users[$contact['uid']] = $contact['uid'];
1948                 }
1949
1950                 $origin_uid = 0;
1951
1952                 if ($item['uri'] != $item['parent-uri']) {
1953                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1954                         while ($parent = dba::fetch($parents)) {
1955                                 $users[$parent['uid']] = $parent['uid'];
1956                                 if ($parent['origin'] && !$origin) {
1957                                         $origin_uid = $parent['uid'];
1958                                 }
1959                         }
1960                 }
1961
1962                 foreach ($users as $uid) {
1963                         if ($origin_uid == $uid) {
1964                                 $item['diaspora_signed_text'] = $signed_text;
1965                         }
1966                         self::storeForUser($itemid, $item, $uid);
1967                 }
1968         }
1969
1970         /**
1971          * @brief Store public items for the receivers
1972          *
1973          * @param integer $itemid Item ID that should be added
1974          * @param array   $item   The item entry that will be stored
1975          * @param integer $uid    The user that will receive the item entry
1976          */
1977         private static function storeForUser($itemid, $item, $uid)
1978         {
1979                 $item['uid'] = $uid;
1980                 $item['origin'] = 0;
1981                 $item['wall'] = 0;
1982                 if ($item['uri'] == $item['parent-uri']) {
1983                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1984                 } else {
1985                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1986                 }
1987
1988                 if (empty($item['contact-id'])) {
1989                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1990                         if (!DBM::is_result($self)) {
1991                                 return;
1992                         }
1993                         $item['contact-id'] = $self['id'];
1994                 }
1995
1996                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1997                         $item['type'] = 'remote-comment';
1998                 } elseif ($item['type'] == 'wall') {
1999                         $item['type'] = 'remote';
2000                 }
2001
2002                 /// @todo Handling of "event-id"
2003
2004                 $notify = false;
2005                 if ($item['uri'] == $item['parent-uri']) {
2006                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2007                         if (DBM::is_result($contact)) {
2008                                 $notify = self::isRemoteSelf($contact, $item);
2009                         }
2010                 }
2011
2012                 $distributed = self::insert($item, false, $notify, true);
2013
2014                 if (!$distributed) {
2015                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
2016                 } else {
2017                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
2018                 }
2019         }
2020
2021         /**
2022          * @brief Add a shadow entry for a given item id that is a thread starter
2023          *
2024          * We store every public item entry additionally with the user id "0".
2025          * This is used for the community page and for the search.
2026          * It is planned that in the future we will store public item entries only once.
2027          *
2028          * @param integer $itemid Item ID that should be added
2029          */
2030         public static function addShadow($itemid)
2031         {
2032                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2033                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2034                 $item = self::selectFirst($fields, $condition);
2035
2036                 if (!DBM::is_result($item)) {
2037                         return;
2038                 }
2039
2040                 // is it already a copy?
2041                 if (($itemid == 0) || ($item['uid'] == 0)) {
2042                         return;
2043                 }
2044
2045                 // Is it a visible public post?
2046                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2047                         return;
2048                 }
2049
2050                 // is it an entry from a connector? Only add an entry for natively connected networks
2051                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
2052                         return;
2053                 }
2054
2055                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2056                         return;
2057                 }
2058
2059                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2060
2061                 if (DBM::is_result($item)) {
2062                         // Preparing public shadow (removing user specific data)
2063                         $item['uid'] = 0;
2064                         unset($item['id']);
2065                         unset($item['parent']);
2066                         unset($item['wall']);
2067                         unset($item['mention']);
2068                         unset($item['origin']);
2069                         unset($item['starred']);
2070                         if ($item['uri'] == $item['parent-uri']) {
2071                                 $item['contact-id'] = $item['owner-id'];
2072                         } else {
2073                                 $item['contact-id'] = $item['author-id'];
2074                         }
2075
2076                         if (in_array($item['type'], ["net-comment", "wall-comment"])) {
2077                                 $item['type'] = 'remote-comment';
2078                         } elseif ($item['type'] == 'wall') {
2079                                 $item['type'] = 'remote';
2080                         }
2081
2082                         $public_shadow = self::insert($item, false, false, true);
2083
2084                         logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
2085                 }
2086         }
2087
2088         /**
2089          * @brief Add a shadow entry for a given item id that is a comment
2090          *
2091          * This function does the same like the function above - but for comments
2092          *
2093          * @param integer $itemid Item ID that should be added
2094          */
2095         public static function addShadowPost($itemid)
2096         {
2097                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2098                 if (!DBM::is_result($item)) {
2099                         return;
2100                 }
2101
2102                 // Is it a toplevel post?
2103                 if ($item['id'] == $item['parent']) {
2104                         self::addShadow($itemid);
2105                         return;
2106                 }
2107
2108                 // Is this a shadow entry?
2109                 if ($item['uid'] == 0) {
2110                         return;
2111                 }
2112
2113                 // Is there a shadow parent?
2114                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2115                         return;
2116                 }
2117
2118                 // Is there already a shadow entry?
2119                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2120                         return;
2121                 }
2122
2123                 // Save "origin" and "parent" state
2124                 $origin = $item['origin'];
2125                 $parent = $item['parent'];
2126
2127                 // Preparing public shadow (removing user specific data)
2128                 $item['uid'] = 0;
2129                 unset($item['id']);
2130                 unset($item['parent']);
2131                 unset($item['wall']);
2132                 unset($item['mention']);
2133                 unset($item['origin']);
2134                 unset($item['starred']);
2135                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2136
2137                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
2138                         $item['type'] = 'remote-comment';
2139                 } elseif ($item['type'] == 'wall') {
2140                         $item['type'] = 'remote';
2141                 }
2142
2143                 $public_shadow = self::insert($item, false, false, true);
2144
2145                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
2146
2147                 // If this was a comment to a Diaspora post we don't get our comment back.
2148                 // This means that we have to distribute the comment by ourselves.
2149                 if ($origin && self::exists(['id' => $parent, 'network' => NETWORK_DIASPORA])) {
2150                         self::distribute($public_shadow);
2151                 }
2152         }
2153
2154          /**
2155          * Adds a language specification in a "language" element of given $arr.
2156          * Expects "body" element to exist in $arr.
2157          */
2158         private static function addLanguageToItemArray(&$item)
2159         {
2160                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
2161
2162                 $ld = new Text_LanguageDetect();
2163                 $ld->setNameMode(2);
2164                 $languages = $ld->detect($naked_body, 3);
2165
2166                 if (is_array($languages)) {
2167                         $item['language'] = json_encode($languages);
2168                 }
2169         }
2170
2171         /**
2172          * @brief Creates an unique guid out of a given uri
2173          *
2174          * @param string $uri uri of an item entry
2175          * @param string $host hostname for the GUID prefix
2176          * @return string unique guid
2177          */
2178         public static function guidFromUri($uri, $host)
2179         {
2180                 // Our regular guid routine is using this kind of prefix as well
2181                 // We have to avoid that different routines could accidentally create the same value
2182                 $parsed = parse_url($uri);
2183
2184                 // We use a hash of the hostname as prefix for the guid
2185                 $guid_prefix = hash("crc32", $host);
2186
2187                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2188                 unset($parsed["scheme"]);
2189
2190                 // Glue it together to be able to make a hash from it
2191                 $host_id = implode("/", $parsed);
2192
2193                 // We could use any hash algorithm since it isn't a security issue
2194                 $host_hash = hash("ripemd128", $host_id);
2195
2196                 return $guid_prefix.$host_hash;
2197         }
2198
2199         /**
2200          * generate an unique URI
2201          *
2202          * @param integer $uid User id
2203          * @param string $guid An existing GUID (Otherwise it will be generated)
2204          *
2205          * @return string
2206          */
2207         public static function newURI($uid, $guid = "")
2208         {
2209                 if ($guid == "") {
2210                         $guid = System::createGUID(32);
2211                 }
2212
2213                 $hostname = self::getApp()->get_hostname();
2214
2215                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
2216
2217                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
2218
2219                 return $uri;
2220         }
2221
2222         /**
2223          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2224          *
2225          * This can be used to filter for inactive contacts.
2226          * Only do this for public postings to avoid privacy problems, since poco data is public.
2227          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2228          *
2229          * @param array $arr Contains the just posted item record
2230          */
2231         private static function updateContact($arr)
2232         {
2233                 // Unarchive the author
2234                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2235                 if (DBM::is_result($contact)) {
2236                         Contact::unmarkForArchival($contact);
2237                 }
2238
2239                 // Unarchive the contact if it's not our own contact
2240                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2241                 if (DBM::is_result($contact)) {
2242                         Contact::unmarkForArchival($contact);
2243                 }
2244
2245                 $update = (!$arr['private'] && ((defaults($arr, 'author-link', '') === defaults($arr, 'owner-link', '')) || ($arr["parent-uri"] === $arr["uri"])));
2246
2247                 // Is it a forum? Then we don't care about the rules from above
2248                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
2249                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2250                                 $update = true;
2251                         }
2252                 }
2253
2254                 if ($update) {
2255                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2256                                 ['id' => $arr['contact-id']]);
2257                 }
2258                 // Now do the same for the system wide contacts with uid=0
2259                 if (!$arr['private']) {
2260                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2261                                 ['id' => $arr['owner-id']]);
2262
2263                         if ($arr['owner-id'] != $arr['author-id']) {
2264                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2265                                         ['id' => $arr['author-id']]);
2266                         }
2267                 }
2268         }
2269
2270         public static function setHashtags(&$item)
2271         {
2272
2273                 $tags = get_tags($item["body"]);
2274
2275                 // No hashtags?
2276                 if (!count($tags)) {
2277                         return false;
2278                 }
2279
2280                 // This sorting is important when there are hashtags that are part of other hashtags
2281                 // Otherwise there could be problems with hashtags like #test and #test2
2282                 rsort($tags);
2283
2284                 $URLSearchString = "^\[\]";
2285
2286                 // All hashtags should point to the home server if "local_tags" is activated
2287                 if (Config::get('system', 'local_tags')) {
2288                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2289                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2290
2291                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2292                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2293                 }
2294
2295                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2296                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2297                         function ($match) {
2298                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2299                         }, $item["body"]);
2300
2301                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2302                         function ($match) {
2303                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2304                         }, $item["body"]);
2305
2306                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2307                         function ($match) {
2308                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2309                         }, $item["body"]);
2310
2311                 // Repair recursive urls
2312                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2313                                 "&num;$2", $item["body"]);
2314
2315                 foreach ($tags as $tag) {
2316                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
2317                                 continue;
2318                         }
2319
2320                         $basetag = str_replace('_',' ',substr($tag,1));
2321
2322                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
2323
2324                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2325
2326                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2327                                 if (strlen($item["tag"])) {
2328                                         $item["tag"] = ','.$item["tag"];
2329                                 }
2330                                 $item["tag"] = $newtag.$item["tag"];
2331                         }
2332                 }
2333
2334                 // Convert back the masked hashtags
2335                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2336         }
2337
2338         public static function getGuidById($id)
2339         {
2340                 $item = self::selectFirst(['guid'], ['id' => $id]);
2341                 if (DBM::is_result($item)) {
2342                         return $item['guid'];
2343                 } else {
2344                         return '';
2345                 }
2346         }
2347
2348         public static function getIdAndNickByGuid($guid, $uid = 0)
2349         {
2350                 $nick = "";
2351                 $id = 0;
2352
2353                 if ($uid == 0) {
2354                         $uid == local_user();
2355                 }
2356
2357                 // Does the given user have this item?
2358                 if ($uid) {
2359                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2360                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2361                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2362                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
2363                         if (DBM::is_result($item)) {
2364                                 $id = $item["id"];
2365                                 $nick = $item["nickname"];
2366                         }
2367                 }
2368
2369                 // Or is it anywhere on the server?
2370                 if ($nick == "") {
2371                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2372                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2373                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2374                                         AND NOT `item`.`private` AND `item`.`wall`
2375                                         AND `item`.`guid` = ?", $guid);
2376                         if (DBM::is_result($item)) {
2377                                 $id = $item["id"];
2378                                 $nick = $item["nickname"];
2379                         }
2380                 }
2381                 return ["nick" => $nick, "id" => $id];
2382         }
2383
2384         /**
2385          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2386          * @param int $uid
2387          * @param int $item_id
2388          * @return bool true if item was deleted, else false
2389          */
2390         private static function tagDeliver($uid, $item_id)
2391         {
2392                 $mention = false;
2393
2394                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
2395                 if (!DBM::is_result($user)) {
2396                         return;
2397                 }
2398
2399                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
2400                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
2401
2402                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2403                 if (!DBM::is_result($item)) {
2404                         return;
2405                 }
2406
2407                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
2408
2409                 /*
2410                  * Diaspora uses their own hardwired link URL in @-tags
2411                  * instead of the one we supply with webfinger
2412                  */
2413                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
2414
2415                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2416                 if ($cnt) {
2417                         foreach ($matches as $mtch) {
2418                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
2419                                         $mention = true;
2420                                         logger('mention found: ' . $mtch[2]);
2421                                 }
2422                         }
2423                 }
2424
2425                 if (!$mention) {
2426                         if (($community_page || $prvgroup) &&
2427                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2428                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2429                                 // delete it!
2430                                 logger("no-mention top-level post to community or private group. delete.");
2431                                 dba::delete('item', ['id' => $item_id]);
2432                                 return true;
2433                         }
2434                         return;
2435                 }
2436
2437                 $arr = ['item' => $item, 'user' => $user];
2438
2439                 Addon::callHooks('tagged', $arr);
2440
2441                 if (!$community_page && !$prvgroup) {
2442                         return;
2443                 }
2444
2445                 /*
2446                  * tgroup delivery - setup a second delivery chain
2447                  * prevent delivery looping - only proceed
2448                  * if the message originated elsewhere and is a top-level post
2449                  */
2450                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2451                         return;
2452                 }
2453
2454                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2455                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2456                 if (!DBM::is_result($self)) {
2457                         return;
2458                 }
2459
2460                 $owner_id = Contact::getIdForURL($self['url']);
2461
2462                 // also reset all the privacy bits to the forum default permissions
2463
2464                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2465
2466                 $forum_mode = ($prvgroup ? 2 : 1);
2467
2468                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2469                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
2470                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
2471                 dba::update('item', $fields, ['id' => $item_id]);
2472
2473                 self::updateThread($item_id);
2474
2475                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2476         }
2477
2478         public static function isRemoteSelf($contact, &$datarray)
2479         {
2480                 $a = get_app();
2481
2482                 if (!$contact['remote_self']) {
2483                         return false;
2484                 }
2485
2486                 // Prevent the forwarding of posts that are forwarded
2487                 if (!empty($datarray["extid"]) && ($datarray["extid"] == NETWORK_DFRN)) {
2488                         logger('Already forwarded', LOGGER_DEBUG);
2489                         return false;
2490                 }
2491
2492                 // Prevent to forward already forwarded posts
2493                 if ($datarray["app"] == $a->get_hostname()) {
2494                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2495                         return false;
2496                 }
2497
2498                 // Only forward posts
2499                 if ($datarray["verb"] != ACTIVITY_POST) {
2500                         logger('No post', LOGGER_DEBUG);
2501                         return false;
2502                 }
2503
2504                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2505                         logger('Not public', LOGGER_DEBUG);
2506                         return false;
2507                 }
2508
2509                 $datarray2 = $datarray;
2510                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2511                 if ($contact['remote_self'] == 2) {
2512                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2513                                         ['uid' => $contact['uid'], 'self' => true]);
2514                         if (DBM::is_result($self)) {
2515                                 $datarray['contact-id'] = $self["id"];
2516
2517                                 $datarray['owner-name'] = $self["name"];
2518                                 $datarray['owner-link'] = $self["url"];
2519                                 $datarray['owner-avatar'] = $self["thumb"];
2520
2521                                 $datarray['author-name']   = $datarray['owner-name'];
2522                                 $datarray['author-link']   = $datarray['owner-link'];
2523                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2524
2525                                 unset($datarray['created']);
2526                                 unset($datarray['edited']);
2527
2528                                 unset($datarray['network']);
2529                                 unset($datarray['owner-id']);
2530                                 unset($datarray['author-id']);
2531                         }
2532
2533                         if ($contact['network'] != NETWORK_FEED) {
2534                                 $datarray["guid"] = System::createGUID(32);
2535                                 unset($datarray["plink"]);
2536                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2537                                 $datarray["parent-uri"] = $datarray["uri"];
2538                                 $datarray["thr-parent"] = $datarray["uri"];
2539                                 $datarray["extid"] = NETWORK_DFRN;
2540                                 $urlpart = parse_url($datarray2['author-link']);
2541                                 $datarray["app"] = $urlpart["host"];
2542                         } else {
2543                                 $datarray['private'] = 0;
2544                         }
2545                 }
2546
2547                 if ($contact['network'] != NETWORK_FEED) {
2548                         // Store the original post
2549                         $result = self::insert($datarray2, false, false);
2550                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2551                 } else {
2552                         $datarray["app"] = "Feed";
2553                         $result = true;
2554                 }
2555
2556                 // Trigger automatic reactions for addons
2557                 $datarray['api_source'] = true;
2558
2559                 // We have to tell the hooks who we are - this really should be improved
2560                 $_SESSION["authenticated"] = true;
2561                 $_SESSION["uid"] = $contact['uid'];
2562
2563                 return $result;
2564         }
2565
2566         /**
2567          *
2568          * @param string $s
2569          * @param int    $uid
2570          * @param array  $item
2571          * @param int    $cid
2572          * @return string
2573          */
2574         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2575         {
2576                 if (Config::get('system', 'disable_embedded')) {
2577                         return $s;
2578                 }
2579
2580                 logger('check for photos', LOGGER_DEBUG);
2581                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2582
2583                 $orig_body = $s;
2584                 $new_body = '';
2585
2586                 $img_start = strpos($orig_body, '[img');
2587                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2588                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2589
2590                 while (($img_st_close !== false) && ($img_len !== false)) {
2591                         $img_st_close++; // make it point to AFTER the closing bracket
2592                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2593
2594                         logger('found photo ' . $image, LOGGER_DEBUG);
2595
2596                         if (stristr($image, $site . '/photo/')) {
2597                                 // Only embed locally hosted photos
2598                                 $replace = false;
2599                                 $i = basename($image);
2600                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2601                                 $x = strpos($i, '-');
2602
2603                                 if ($x) {
2604                                         $res = substr($i, $x + 1);
2605                                         $i = substr($i, 0, $x);
2606                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2607                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2608                                         if (DBM::is_result($photo)) {
2609                                                 /*
2610                                                  * Check to see if we should replace this photo link with an embedded image
2611                                                  * 1. No need to do so if the photo is public
2612                                                  * 2. If there's a contact-id provided, see if they're in the access list
2613                                                  *    for the photo. If so, embed it.
2614                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2615                                                  *    permissions, regardless of order but first check to see if they're an exact
2616                                                  *    match to save some processing overhead.
2617                                                  */
2618                                                 if (self::hasPermissions($photo)) {
2619                                                         if ($cid) {
2620                                                                 $recips = self::enumeratePermissions($photo);
2621                                                                 if (in_array($cid, $recips)) {
2622                                                                         $replace = true;
2623                                                                 }
2624                                                         } elseif ($item) {
2625                                                                 if (self::samePermissions($item, $photo)) {
2626                                                                         $replace = true;
2627                                                                 }
2628                                                         }
2629                                                 }
2630                                                 if ($replace) {
2631                                                         $data = $photo['data'];
2632                                                         $type = $photo['type'];
2633
2634                                                         // If a custom width and height were specified, apply before embedding
2635                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2636                                                                 logger('scaling photo', LOGGER_DEBUG);
2637
2638                                                                 $width = intval($match[1]);
2639                                                                 $height = intval($match[2]);
2640
2641                                                                 $Image = new Image($data, $type);
2642                                                                 if ($Image->isValid()) {
2643                                                                         $Image->scaleDown(max($width, $height));
2644                                                                         $data = $Image->asString();
2645                                                                         $type = $Image->getType();
2646                                                                 }
2647                                                         }
2648
2649                                                         logger('replacing photo', LOGGER_DEBUG);
2650                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2651                                                         logger('replaced: ' . $image, LOGGER_DATA);
2652                                                 }
2653                                         }
2654                                 }
2655                         }
2656
2657                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2658                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2659                         if ($orig_body === false) {
2660                                 $orig_body = '';
2661                         }
2662
2663                         $img_start = strpos($orig_body, '[img');
2664                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2665                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2666                 }
2667
2668                 $new_body = $new_body . $orig_body;
2669
2670                 return $new_body;
2671         }
2672
2673         private static function hasPermissions($obj)
2674         {
2675                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2676                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2677         }
2678
2679         private static function samePermissions($obj1, $obj2)
2680         {
2681                 // first part is easy. Check that these are exactly the same.
2682                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2683                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2684                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2685                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2686                         return true;
2687                 }
2688
2689                 // This is harder. Parse all the permissions and compare the resulting set.
2690                 $recipients1 = self::enumeratePermissions($obj1);
2691                 $recipients2 = self::enumeratePermissions($obj2);
2692                 sort($recipients1);
2693                 sort($recipients2);
2694
2695                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2696                 return ($recipients1 == $recipients2);
2697         }
2698
2699         // returns an array of contact-ids that are allowed to see this object
2700         private static function enumeratePermissions($obj)
2701         {
2702                 $allow_people = expand_acl($obj['allow_cid']);
2703                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2704                 $deny_people  = expand_acl($obj['deny_cid']);
2705                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2706                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2707                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2708                 $recipients   = array_diff($recipients, $deny);
2709                 return $recipients;
2710         }
2711
2712         public static function getFeedTags($item)
2713         {
2714                 $ret = [];
2715                 $matches = false;
2716                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2717                 if ($cnt) {
2718                         for ($x = 0; $x < $cnt; $x ++) {
2719                                 if ($matches[1][$x]) {
2720                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2721                                 }
2722                         }
2723                 }
2724                 $matches = false;
2725                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2726                 if ($cnt) {
2727                         for ($x = 0; $x < $cnt; $x ++) {
2728                                 if ($matches[1][$x]) {
2729                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2730                                 }
2731                         }
2732                 }
2733                 return $ret;
2734         }
2735
2736         public static function expire($uid, $days, $network = "", $force = false)
2737         {
2738                 if (!$uid || ($days < 1)) {
2739                         return;
2740                 }
2741
2742                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2743                         $uid, GRAVITY_PARENT];
2744
2745                 /*
2746                  * $expire_network_only = save your own wall posts
2747                  * and just expire conversations started by others
2748                  */
2749                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
2750
2751                 if ($expire_network_only) {
2752                         $condition[0] .= " AND NOT `wall`";
2753                 }
2754
2755                 if ($network != "") {
2756                         $condition[0] .= " AND `network` = ?";
2757                         $condition[] = $network;
2758
2759                         /*
2760                          * There is an index "uid_network_received" but not "uid_network_created"
2761                          * This avoids the creation of another index just for one purpose.
2762                          * And it doesn't really matter wether to look at "received" or "created"
2763                          */
2764                         $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2765                         $condition[] = $days;
2766                 } else {
2767                         $condition[0] .= " AND `created` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2768                         $condition[] = $days;
2769                 }
2770
2771                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id'], $condition);
2772
2773                 if (!DBM::is_result($items)) {
2774                         return;
2775                 }
2776
2777                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
2778
2779                 // Forcing expiring of items - but not notes and marked items
2780                 if ($force) {
2781                         $expire_items = true;
2782                 }
2783
2784                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
2785                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
2786                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
2787
2788                 $expired = 0;
2789
2790                 while ($item = Item::fetch($items)) {
2791                         // don't expire filed items
2792
2793                         if (strpos($item['file'], '[') !== false) {
2794                                 continue;
2795                         }
2796
2797                         // Only expire posts, not photos and photo comments
2798
2799                         if (!$expire_photos && strlen($item['resource-id'])) {
2800                                 continue;
2801                         } elseif (!$expire_starred && intval($item['starred'])) {
2802                                 continue;
2803                         } elseif (!$expire_notes && $item['type'] == 'note') {
2804                                 continue;
2805                         } elseif (!$expire_items && $item['type'] != 'note') {
2806                                 continue;
2807                         }
2808
2809                         self::deleteById($item['id'], PRIORITY_LOW);
2810
2811                         ++$expired;
2812                 }
2813                 dba::close($items);
2814                 logger('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2815         }
2816
2817         public static function firstPostDate($uid, $wall = false)
2818         {
2819                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2820                 $params = ['order' => ['created' => false]];
2821                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2822                 if (DBM::is_result($thread)) {
2823                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2824                 }
2825                 return false;
2826         }
2827
2828         /**
2829          * @brief add/remove activity to an item
2830          *
2831          * Toggle activities as like,dislike,attend of an item
2832          *
2833          * @param string $item_id
2834          * @param string $verb
2835          *              Activity verb. One of
2836          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2837          *                      attendno, unattendno, attendmaybe, unattendmaybe
2838          * @hook 'post_local_end'
2839          *              array $arr
2840          *                      'post_id' => ID of posted item
2841          */
2842         public static function performLike($item_id, $verb)
2843         {
2844                 if (!local_user() && !remote_user()) {
2845                         return false;
2846                 }
2847
2848                 switch ($verb) {
2849                         case 'like':
2850                         case 'unlike':
2851                                 $activity = ACTIVITY_LIKE;
2852                                 break;
2853                         case 'dislike':
2854                         case 'undislike':
2855                                 $activity = ACTIVITY_DISLIKE;
2856                                 break;
2857                         case 'attendyes':
2858                         case 'unattendyes':
2859                                 $activity = ACTIVITY_ATTEND;
2860                                 break;
2861                         case 'attendno':
2862                         case 'unattendno':
2863                                 $activity = ACTIVITY_ATTENDNO;
2864                                 break;
2865                         case 'attendmaybe':
2866                         case 'unattendmaybe':
2867                                 $activity = ACTIVITY_ATTENDMAYBE;
2868                                 break;
2869                         default:
2870                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2871                                 return false;
2872                 }
2873
2874                 // Enable activity toggling instead of on/off
2875                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2876
2877                 logger('like: verb ' . $verb . ' item ' . $item_id);
2878
2879                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2880                 if (!DBM::is_result($item)) {
2881                         logger('like: unknown item ' . $item_id);
2882                         return false;
2883                 }
2884
2885                 $item_uri = $item['uri'];
2886
2887                 $uid = $item['uid'];
2888                 if (($uid == 0) && local_user()) {
2889                         $uid = local_user();
2890                 }
2891
2892                 if (!can_write_wall($uid)) {
2893                         logger('like: unable to write on wall ' . $uid);
2894                         return false;
2895                 }
2896
2897                 // Retrieves the local post owner
2898                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2899                 if (!DBM::is_result($owner_self_contact)) {
2900                         logger('like: unknown owner ' . $uid);
2901                         return false;
2902                 }
2903
2904                 // Retrieve the current logged in user's public contact
2905                 $author_id = public_contact();
2906
2907                 $author_contact = dba::selectFirst('contact', ['url'], ['id' => $author_id]);
2908                 if (!DBM::is_result($author_contact)) {
2909                         logger('like: unknown author ' . $author_id);
2910                         return false;
2911                 }
2912
2913                 // Contact-id is the uid-dependant author contact
2914                 if (local_user() == $uid) {
2915                         $item_contact_id = $owner_self_contact['id'];
2916                         $item_contact = $owner_self_contact;
2917                 } else {
2918                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2919                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2920                         if (!DBM::is_result($item_contact)) {
2921                                 logger('like: unknown item contact ' . $item_contact_id);
2922                                 return false;
2923                         }
2924                 }
2925
2926                 // Look for an existing verb row
2927                 // event participation are essentially radio toggles. If you make a subsequent choice,
2928                 // we need to eradicate your first choice.
2929                 if ($event_verb_flag) {
2930                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
2931
2932                         // Translate to the index based activity index
2933                         $activities = [];
2934                         foreach ($verbs as $verb) {
2935                                 $activities[] = self::activityToIndex($verb);
2936                         }
2937                 } else {
2938                         $activities = self::activityToIndex($activity);
2939                 }
2940
2941                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2942                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
2943
2944                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2945
2946                 // If it exists, mark it as deleted
2947                 if (DBM::is_result($like_item)) {
2948                         // Already voted, undo it
2949                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2950                         /// @todo Consider using self::update - but before doing so, check the side effects
2951                         dba::update('item', $fields, ['id' => $like_item['id']]);
2952
2953                         // Clean up the Diaspora signatures for this like
2954                         dba::delete('sign', ['iid' => $like_item['id']]);
2955
2956                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item['id']);
2957
2958                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2959                                 return true;
2960                         }
2961                 }
2962
2963                 // Verb is "un-something", just trying to delete existing entries
2964                 if (strpos($verb, 'un') === 0) {
2965                         return true;
2966                 }
2967
2968                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2969
2970                 $new_item = [
2971                         'guid'          => System::createGUID(32),
2972                         'uri'           => self::newURI($item['uid']),
2973                         'uid'           => $item['uid'],
2974                         'contact-id'    => $item_contact_id,
2975                         'type'          => 'activity',
2976                         'wall'          => $item['wall'],
2977                         'origin'        => 1,
2978                         'network'       => NETWORK_DFRN,
2979                         'gravity'       => GRAVITY_ACTIVITY,
2980                         'parent'        => $item['id'],
2981                         'parent-uri'    => $item['uri'],
2982                         'thr-parent'    => $item['uri'],
2983                         'owner-id'      => $item['owner-id'],
2984                         'author-id'     => $author_id,
2985                         'body'          => $activity,
2986                         'verb'          => $activity,
2987                         'object-type'   => $objtype,
2988                         'allow_cid'     => $item['allow_cid'],
2989                         'allow_gid'     => $item['allow_gid'],
2990                         'deny_cid'      => $item['deny_cid'],
2991                         'deny_gid'      => $item['deny_gid'],
2992                         'visible'       => 1,
2993                         'unseen'        => 1,
2994                 ];
2995
2996                 $new_item_id = self::insert($new_item);
2997
2998                 // If the parent item isn't visible then set it to visible
2999                 if (!$item['visible']) {
3000                         self::update(['visible' => true], ['id' => $item['id']]);
3001                 }
3002
3003                 // Save the author information for the like in case we need to relay to Diaspora
3004                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
3005
3006                 $new_item['id'] = $new_item_id;
3007
3008                 Addon::callHooks('post_local_end', $new_item);
3009
3010                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
3011
3012                 return true;
3013         }
3014
3015         private static function addThread($itemid, $onlyshadow = false)
3016         {
3017                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3018                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
3019                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3020                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3021                 $item = self::selectFirst($fields, $condition);
3022
3023                 if (!DBM::is_result($item)) {
3024                         return;
3025                 }
3026
3027                 $item['iid'] = $itemid;
3028
3029                 if (!$onlyshadow) {
3030                         $result = dba::insert('thread', $item);
3031
3032                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
3033                 }
3034         }
3035
3036         private static function updateThread($itemid, $setmention = false)
3037         {
3038                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
3039                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
3040                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3041                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3042
3043                 $item = self::selectFirst($fields, $condition);
3044                 if (!DBM::is_result($item)) {
3045                         return;
3046                 }
3047
3048                 if ($setmention) {
3049                         $item["mention"] = 1;
3050                 }
3051
3052                 $sql = "";
3053
3054                 $fields = [];
3055
3056                 foreach ($item as $field => $data) {
3057                         if (!in_array($field, ["guid"])) {
3058                                 $fields[$field] = $data;
3059                         }
3060                 }
3061
3062                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
3063
3064                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
3065         }
3066
3067         private static function deleteThread($itemid, $itemuri = "")
3068         {
3069                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3070                 if (!DBM::is_result($item)) {
3071                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
3072                         return;
3073                 }
3074
3075                 // Using dba::delete at this time could delete the associated item entries
3076                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
3077
3078                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
3079
3080                 if ($itemuri != "") {
3081                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3082                         if (!self::exists($condition)) {
3083                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3084                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
3085                         }
3086                 }
3087         }
3088 }