src/Model/Item.php

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