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\BBCode;
  11 use Friendica\Content\Text\HTML;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\Hook;
  14 use Friendica\Core\L10n;
  15 use Friendica\Core\Lock;
  16 use Friendica\Core\Logger;
  17 use Friendica\Core\PConfig;
  18 use Friendica\Core\Protocol;
  19 use Friendica\Core\Renderer;
  20 use Friendica\Core\Session;
  21 use Friendica\Core\System;
  22 use Friendica\Core\Worker;
  23 use Friendica\Database\DBA;
  24 use Friendica\Protocol\Activity;
  25 use Friendica\Protocol\ActivityPub;
  26 use Friendica\Protocol\Diaspora;
  27 use Friendica\Protocol\OStatus;
  28 use Friendica\Util\ACLFormatter;
  29 use Friendica\Util\DateTimeFormat;
  30 use Friendica\Util\Map;
  31 use Friendica\Util\Network;
  32 use Friendica\Util\Security;
  33 use Friendica\Util\Strings;
  34 use Friendica\Util\XML;
  35 use Friendica\Worker\Delivery;
  36 use Text_LanguageDetect;
  37
  38 class Item extends BaseObject
  39 {
  40         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  41         const PT_ARTICLE = 0;
  42         const PT_NOTE = 1;
  43         const PT_PAGE = 2;
  44         const PT_IMAGE = 16;
  45         const PT_AUDIO = 17;
  46         const PT_VIDEO = 18;
  47         const PT_DOCUMENT = 19;
  48         const PT_EVENT = 32;
  49         const PT_PERSONAL_NOTE = 128;
  50
  51         // Field list that is used to display the items
  52         const DISPLAY_FIELDLIST = [
  53                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  54                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  55                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  56                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  57                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  58                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  59                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  60                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  61                 'writable', 'self', 'cid', 'alias', 'pinned',
  62                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  63                 'event-summary', 'event-desc', 'event-location', 'event-type',
  64                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  65                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  66         ];
  67
  68         // Field list that is used to deliver items via the protocols
  69         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  70                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  71                         'private', 'title', 'body', 'location', 'coord', 'app',
  72                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  73                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  74                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  75                         'signed_text', 'signature', 'signer', 'network'];
  76
  77         // Field list for "item-content" table that is mixed with the item table
  78         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  79                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  80                         'object-type', 'object', 'target-type', 'target', 'plink'];
  81
  82         // Field list for "item-content" table that is not present in the "item" table
  83         const CONTENT_FIELDLIST = ['language'];
  84
  85         // All fields in the item table
  86         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  87                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  88                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  89                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  90                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
  91                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  92                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  93                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  94                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  95                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  96                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  97
  98         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  99         // The item-activity table only stores the index and needs this array to know the matching activity.
 100         const ACTIVITIES = [
 101                 Activity::LIKE, Activity::DISLIKE,
 102                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 103                 Activity::FOLLOW,
 104                 Activity::ANNOUNCE];
 105
 106         private static $legacy_mode = null;
 107
 108         public static function isLegacyMode()
 109         {
 110                 if (is_null(self::$legacy_mode)) {
 111                         self::$legacy_mode = (Config::get("system", "post_update_version") < 1279);
 112                 }
 113
 114                 return self::$legacy_mode;
 115         }
 116
 117         /**
 118          * Set the pinned state of an item
 119          *
 120          * @param integer $iid    Item ID
 121          * @param integer $uid    User ID
 122          * @param boolean $pinned Pinned state
 123          */
 124         public static function setPinned(int $iid, int $uid, bool $pinned)
 125         {
 126                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 127         }
 128
 129         /**
 130          * Get the pinned state
 131          *
 132          * @param integer $iid Item ID
 133          * @param integer $uid User ID
 134          *
 135          * @return boolean pinned state
 136          */
 137         public static function getPinned(int $iid, int $uid)
 138         {
 139                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 140                 if (!DBA::isResult($useritem)) {
 141                         return false;
 142                 }
 143                 return (bool)$useritem['pinned'];
 144         }
 145
 146         /**
 147          * @brief Select pinned rows from the item table for a given user
 148          *
 149          * @param integer $uid       User ID
 150          * @param array   $selected  Array of selected fields, empty for all
 151          * @param array   $condition Array of fields for condition
 152          * @param array   $params    Array of several parameters
 153          *
 154          * @return boolean|object
 155          * @throws \Exception
 156          */
 157         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 158         {
 159                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 160                 if (!DBA::isResult($useritems)) {
 161                         return $useritems;
 162                 }
 163
 164                 $pinned = [];
 165                 while ($useritem = self::fetch($useritems)) {
 166                         $pinned[] = $useritem['iid'];
 167                 }
 168                 DBA::close($useritems);
 169
 170                 if (empty($pinned)) {
 171                         return [];
 172                 }
 173
 174                 if (empty($condition) || !is_array($condition)) {
 175                         $condition = ['iid' => $pinned];
 176                 } else {
 177                         reset($condition);
 178                         $first_key = key($condition);
 179                         if (!is_int($first_key)) {
 180                                 $condition['iid'] = $pinned;
 181                         } else {
 182                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 183                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 184                                 $condition = array_merge($condition, $pinned);
 185                         }
 186                 }
 187
 188                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 189         }
 190
 191         /**
 192          * @brief returns an activity index from an activity string
 193          *
 194          * @param string $activity activity string
 195          * @return integer Activity index
 196          */
 197         public static function activityToIndex($activity)
 198         {
 199                 $index = array_search($activity, self::ACTIVITIES);
 200
 201                 if (is_bool($index)) {
 202                         $index = -1;
 203                 }
 204
 205                 return $index;
 206         }
 207
 208         /**
 209          * @brief returns an activity string from an activity index
 210          *
 211          * @param integer $index activity index
 212          * @return string Activity string
 213          */
 214         private static function indexToActivity($index)
 215         {
 216                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 217                         return '';
 218                 }
 219
 220                 return self::ACTIVITIES[$index];
 221         }
 222
 223         /**
 224          * @brief Fetch a single item row
 225          *
 226          * @param mixed $stmt statement object
 227          * @return array current row
 228          */
 229         public static function fetch($stmt)
 230         {
 231                 $row = DBA::fetch($stmt);
 232
 233                 if (is_bool($row)) {
 234                         return $row;
 235                 }
 236
 237                 // ---------------------- Transform item structure data ----------------------
 238
 239                 // We prefer the data from the user's contact over the public one
 240                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 241                         ($row['author-link'] == $row['contact-link'])) {
 242                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 243                                 $row['author-avatar'] = $row['contact-avatar'];
 244                         }
 245                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 246                                 $row['author-name'] = $row['contact-name'];
 247                         }
 248                 }
 249
 250                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 251                         ($row['owner-link'] == $row['contact-link'])) {
 252                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 253                                 $row['owner-avatar'] = $row['contact-avatar'];
 254                         }
 255                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 256                                 $row['owner-name'] = $row['contact-name'];
 257                         }
 258                 }
 259
 260                 // We can always comment on posts from these networks
 261                 if (array_key_exists('writable', $row) &&
 262                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 263                         $row['writable'] = true;
 264                 }
 265
 266                 // ---------------------- Transform item content data ----------------------
 267
 268                 // Fetch data from the item-content table whenever there is content there
 269                 if (self::isLegacyMode()) {
 270                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 271                         foreach ($legacy_fields as $field) {
 272                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 273                                         $row[$field] = $row['internal-item-' . $field];
 274                                 }
 275                                 unset($row['internal-item-' . $field]);
 276                         }
 277                 }
 278
 279                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 280                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 281                         if (array_key_exists('title', $row)) {
 282                                 $row['title'] = '';
 283                         }
 284                         if (array_key_exists('body', $row)) {
 285                                 $row['body'] = $row['verb'];
 286                         }
 287                         if (array_key_exists('object', $row)) {
 288                                 $row['object'] = '';
 289                         }
 290                         if (array_key_exists('object-type', $row)) {
 291                                 $row['object-type'] = Activity\ObjectType::NOTE;
 292                         }
 293                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 294                         // Posts don't have a target - but having tags or files.
 295                         // We safe some performance by building tag and file strings only here.
 296                         // We remove the target since they aren't used for this type.
 297                         // In mail posts we do store some mail header data in the object.
 298                         if (array_key_exists('target', $row)) {
 299                                 $row['target'] = '';
 300                         }
 301                 }
 302
 303                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 304                         // Build the tag string out of the term entries
 305                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 306                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 307                         }
 308
 309                         // Build the file string out of the term entries
 310                         if (array_key_exists('file', $row) && empty($row['file'])) {
 311                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 312                         }
 313                 }
 314
 315                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 316                         $row['signed_text'] = $row['interaction'];
 317                 }
 318
 319                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 320                         $row['ignored'] = $row['internal-user-ignored'];
 321                 }
 322
 323                 // Remove internal fields
 324                 unset($row['internal-activity']);
 325                 unset($row['internal-network']);
 326                 unset($row['internal-iid']);
 327                 unset($row['internal-iaid']);
 328                 unset($row['internal-icid']);
 329                 unset($row['internal-user-ignored']);
 330                 unset($row['interaction']);
 331
 332                 return $row;
 333         }
 334
 335         /**
 336          * @brief Fills an array with data from an item query
 337          *
 338          * @param object $stmt statement object
 339          * @param bool   $do_close
 340          * @return array Data array
 341          */
 342         public static function inArray($stmt, $do_close = true) {
 343                 if (is_bool($stmt)) {
 344                         return $stmt;
 345                 }
 346
 347                 $data = [];
 348                 while ($row = self::fetch($stmt)) {
 349                         $data[] = $row;
 350                 }
 351                 if ($do_close) {
 352                         DBA::close($stmt);
 353                 }
 354                 return $data;
 355         }
 356
 357         /**
 358          * @brief Check if item data exists
 359          *
 360          * @param array $condition array of fields for condition
 361          *
 362          * @return boolean Are there rows for that condition?
 363          * @throws \Exception
 364          */
 365         public static function exists($condition) {
 366                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 367
 368                 if (is_bool($stmt)) {
 369                         $retval = $stmt;
 370                 } else {
 371                         $retval = (DBA::numRows($stmt) > 0);
 372                 }
 373
 374                 DBA::close($stmt);
 375
 376                 return $retval;
 377         }
 378
 379         /**
 380          * Retrieve a single record from the item table for a given user and returns it in an associative array
 381          *
 382          * @brief Retrieve a single record from a table
 383          * @param integer $uid User ID
 384          * @param array   $selected
 385          * @param array   $condition
 386          * @param array   $params
 387          * @return bool|array
 388          * @throws \Exception
 389          * @see   DBA::select
 390          */
 391         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 392         {
 393                 $params['uid'] = $uid;
 394
 395                 if (empty($selected)) {
 396                         $selected = Item::DISPLAY_FIELDLIST;
 397                 }
 398
 399                 return self::selectFirst($selected, $condition, $params);
 400         }
 401
 402         /**
 403          * @brief Select rows from the item table for a given user
 404          *
 405          * @param integer $uid       User ID
 406          * @param array   $selected  Array of selected fields, empty for all
 407          * @param array   $condition Array of fields for condition
 408          * @param array   $params    Array of several parameters
 409          *
 410          * @return boolean|object
 411          * @throws \Exception
 412          */
 413         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 414         {
 415                 $params['uid'] = $uid;
 416
 417                 if (empty($selected)) {
 418                         $selected = Item::DISPLAY_FIELDLIST;
 419                 }
 420
 421                 return self::select($selected, $condition, $params);
 422         }
 423
 424         /**
 425          * Retrieve a single record from the item table and returns it in an associative array
 426          *
 427          * @brief Retrieve a single record from a table
 428          * @param array $fields
 429          * @param array $condition
 430          * @param array $params
 431          * @return bool|array
 432          * @throws \Exception
 433          * @see   DBA::select
 434          */
 435         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 436         {
 437                 $params['limit'] = 1;
 438
 439                 $result = self::select($fields, $condition, $params);
 440
 441                 if (is_bool($result)) {
 442                         return $result;
 443                 } else {
 444                         $row = self::fetch($result);
 445                         DBA::close($result);
 446                         return $row;
 447                 }
 448         }
 449
 450         /**
 451          * @brief Select rows from the item table and returns them as an array
 452          *
 453          * @param array $selected  Array of selected fields, empty for all
 454          * @param array $condition Array of fields for condition
 455          * @param array $params    Array of several parameters
 456          *
 457          * @return array
 458          * @throws \Exception
 459          */
 460         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 461         {
 462                 $result = self::select($fields, $condition, $params);
 463
 464                 if (is_bool($result)) {
 465                         return [];
 466                 }
 467
 468                 $data = [];
 469                 while ($row = self::fetch($result)) {
 470                         $data[] = $row;
 471                 }
 472                 DBA::close($result);
 473
 474                 return $data;
 475         }
 476
 477         /**
 478          * @brief Select rows from the item table
 479          *
 480          * @param array $selected  Array of selected fields, empty for all
 481          * @param array $condition Array of fields for condition
 482          * @param array $params    Array of several parameters
 483          *
 484          * @return boolean|object
 485          * @throws \Exception
 486          */
 487         public static function select(array $selected = [], array $condition = [], $params = [])
 488         {
 489                 $uid = 0;
 490                 $usermode = false;
 491
 492                 if (isset($params['uid'])) {
 493                         $uid = $params['uid'];
 494                         $usermode = true;
 495                 }
 496
 497                 $fields = self::fieldlist($usermode);
 498
 499                 $select_fields = self::constructSelectFields($fields, $selected);
 500
 501                 $condition_string = DBA::buildCondition($condition);
 502
 503                 $condition_string = self::addTablesToFields($condition_string, $fields);
 504
 505                 if ($usermode) {
 506                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 507                 }
 508
 509                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 510
 511                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 512
 513                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 514
 515                 return DBA::p($sql, $condition);
 516         }
 517
 518         /**
 519          * @brief Select rows from the starting post in the item table
 520          *
 521          * @param integer $uid       User ID
 522          * @param array   $selected
 523          * @param array   $condition Array of fields for condition
 524          * @param array   $params    Array of several parameters
 525          *
 526          * @return boolean|object
 527          * @throws \Exception
 528          */
 529         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 530         {
 531                 $params['uid'] = $uid;
 532
 533                 if (empty($selected)) {
 534                         $selected = Item::DISPLAY_FIELDLIST;
 535                 }
 536
 537                 return self::selectThread($selected, $condition, $params);
 538         }
 539
 540         /**
 541          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 542          *
 543          * @brief Retrieve a single record from a table
 544          * @param integer $uid User ID
 545          * @param array   $selected
 546          * @param array   $condition
 547          * @param array   $params
 548          * @return bool|array
 549          * @throws \Exception
 550          * @see   DBA::select
 551          */
 552         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 553         {
 554                 $params['uid'] = $uid;
 555
 556                 if (empty($selected)) {
 557                         $selected = Item::DISPLAY_FIELDLIST;
 558                 }
 559
 560                 return self::selectFirstThread($selected, $condition, $params);
 561         }
 562
 563         /**
 564          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 565          *
 566          * @brief Retrieve a single record from a table
 567          * @param array $fields
 568          * @param array $condition
 569          * @param array $params
 570          * @return bool|array
 571          * @throws \Exception
 572          * @see   DBA::select
 573          */
 574         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 575         {
 576                 $params['limit'] = 1;
 577                 $result = self::selectThread($fields, $condition, $params);
 578
 579                 if (is_bool($result)) {
 580                         return $result;
 581                 } else {
 582                         $row = self::fetch($result);
 583                         DBA::close($result);
 584                         return $row;
 585                 }
 586         }
 587
 588         /**
 589          * @brief Select rows from the starting post in the item table
 590          *
 591          * @param array $selected  Array of selected fields, empty for all
 592          * @param array $condition Array of fields for condition
 593          * @param array $params    Array of several parameters
 594          *
 595          * @return boolean|object
 596          * @throws \Exception
 597          */
 598         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 599         {
 600                 $uid = 0;
 601                 $usermode = false;
 602
 603                 if (isset($params['uid'])) {
 604                         $uid = $params['uid'];
 605                         $usermode = true;
 606                 }
 607
 608                 $fields = self::fieldlist($usermode);
 609
 610                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 611
 612                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 613                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 614                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 615                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 616
 617                 $select_fields = self::constructSelectFields($fields, $selected);
 618
 619                 $condition_string = DBA::buildCondition($condition);
 620
 621                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 622                 $condition_string = self::addTablesToFields($condition_string, $fields);
 623
 624                 if ($usermode) {
 625                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 626                 }
 627
 628                 $param_string = DBA::buildParameter($params);
 629                 $param_string = self::addTablesToFields($param_string, $threadfields);
 630                 $param_string = self::addTablesToFields($param_string, $fields);
 631
 632                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 633
 634                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 635
 636                 return DBA::p($sql, $condition);
 637         }
 638
 639         /**
 640          * @brief Returns a list of fields that are associated with the item table
 641          *
 642          * @param $usermode
 643          * @return array field list
 644          */
 645         private static function fieldlist($usermode)
 646         {
 647                 $fields = [];
 648
 649                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 650                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 651                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 652                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 653                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 654                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 655                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 656                         'network' => 'internal-network', 'icid' => 'internal-icid',
 657                         'iaid' => 'internal-iaid'];
 658
 659                 if ($usermode) {
 660                         $fields['user-item'] = ['pinned', 'ignored' => 'internal-user-ignored'];
 661                 }
 662
 663                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 664
 665                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 666
 667                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 668
 669                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 670
 671                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 672                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 673
 674                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 675                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 676
 677                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 678                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 679                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 680
 681                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 682
 683                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 684
 685                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 686                         'start' => 'event-start','finish' => 'event-finish',
 687                         'summary' => 'event-summary','desc' => 'event-desc',
 688                         'location' => 'event-location', 'type' => 'event-type',
 689                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 690                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 691
 692                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 693
 694                 $fields['diaspora-interaction'] = ['interaction'];
 695
 696                 return $fields;
 697         }
 698
 699         /**
 700          * @brief Returns SQL condition for the "select" functions
 701          *
 702          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 703          *
 704          * @return string SQL condition
 705          */
 706         private static function condition($thread_mode)
 707         {
 708                 if ($thread_mode) {
 709                         $master_table = "`thread`";
 710                 } else {
 711                         $master_table = "`item`";
 712                 }
 713                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 714                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 715                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 716                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 717                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 718                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 719                         GRAVITY_PARENT, GRAVITY_PARENT);
 720         }
 721
 722         /**
 723          * @brief Returns all needed "JOIN" commands for the "select" functions
 724          *
 725          * @param integer $uid          User ID
 726          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 727          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 728          *
 729          * @param         $user_mode
 730          * @return string The SQL joins for the "select" functions
 731          */
 732         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 733         {
 734                 if ($thread_mode) {
 735                         $master_table = "`thread`";
 736                         $master_table_key = "`thread`.`iid`";
 737                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 738                 } else {
 739                         $master_table = "`item`";
 740                         $master_table_key = "`item`.`id`";
 741                         $joins = '';
 742                 }
 743
 744                 if ($user_mode) {
 745                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 746                                 AND NOT `contact`.`blocked`
 747                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 748                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 749                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 750                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 751                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 752                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 753                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 754                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 755                 } else {
 756                         if (strpos($sql_commands, "`contact`.") !== false) {
 757                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 758                         }
 759                         if (strpos($sql_commands, "`author`.") !== false) {
 760                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 761                         }
 762                         if (strpos($sql_commands, "`owner`.") !== false) {
 763                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 764                         }
 765                 }
 766
 767                 if (strpos($sql_commands, "`group_member`.") !== false) {
 768                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 769                 }
 770
 771                 if (strpos($sql_commands, "`user`.") !== false) {
 772                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 773                 }
 774
 775                 if (strpos($sql_commands, "`event`.") !== false) {
 776                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 777                 }
 778
 779                 if (strpos($sql_commands, "`sign`.") !== false) {
 780                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 781                 }
 782
 783                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 784                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 785                 }
 786
 787                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 788                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 789                 }
 790
 791                 if (strpos($sql_commands, "`item-content`.") !== false) {
 792                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 793                 }
 794
 795                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 796                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 797                 }
 798
 799                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 800                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 801                 }
 802
 803                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 804                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 805                 }
 806
 807                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 808                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 809                 }
 810
 811                 return $joins;
 812         }
 813
 814         /**
 815          * @brief Add the field list for the "select" functions
 816          *
 817          * @param array $fields The field definition array
 818          * @param array $selected The array with the selected fields from the "select" functions
 819          *
 820          * @return string The field list
 821          */
 822         private static function constructSelectFields($fields, $selected)
 823         {
 824                 if (!empty($selected)) {
 825                         $selected[] = 'internal-iid';
 826                         $selected[] = 'internal-iaid';
 827                         $selected[] = 'internal-icid';
 828                         $selected[] = 'internal-network';
 829                 }
 830
 831                 if (in_array('verb', $selected)) {
 832                         $selected[] = 'internal-activity';
 833                 }
 834
 835                 if (in_array('ignored', $selected)) {
 836                         $selected[] = 'internal-user-ignored';
 837                 }
 838
 839                 if (in_array('signed_text', $selected)) {
 840                         $selected[] = 'interaction';
 841                 }
 842
 843                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 844
 845                 $selection = [];
 846                 foreach ($fields as $table => $table_fields) {
 847                         foreach ($table_fields as $field => $select) {
 848                                 if (empty($selected) || in_array($select, $selected)) {
 849                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 850                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 851                                         }
 852                                         if (is_int($field)) {
 853                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 854                                         } else {
 855                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 856                                         }
 857                                 }
 858                         }
 859                 }
 860                 return implode(", ", $selection);
 861         }
 862
 863         /**
 864          * @brief add table definition to fields in an SQL query
 865          *
 866          * @param string $query SQL query
 867          * @param array $fields The field definition array
 868          *
 869          * @return string the changed SQL query
 870          */
 871         private static function addTablesToFields($query, $fields)
 872         {
 873                 foreach ($fields as $table => $table_fields) {
 874                         foreach ($table_fields as $alias => $field) {
 875                                 if (is_int($alias)) {
 876                                         $replace_field = $field;
 877                                 } else {
 878                                         $replace_field = $alias;
 879                                 }
 880
 881                                 $search = "/([^\.])`" . $field . "`/i";
 882                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 883                                 $query = preg_replace($search, $replace, $query);
 884                         }
 885                 }
 886                 return $query;
 887         }
 888
 889         /**
 890          * @brief Update existing item entries
 891          *
 892          * @param array $fields    The fields that are to be changed
 893          * @param array $condition The condition for finding the item entries
 894          *
 895          * In the future we may have to change permissions as well.
 896          * Then we had to add the user id as third parameter.
 897          *
 898          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 899          *
 900          * @return integer|boolean number of affected rows - or "false" if there was an error
 901          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 902          */
 903         public static function update(array $fields, array $condition)
 904         {
 905                 if (empty($condition) || empty($fields)) {
 906                         return false;
 907                 }
 908
 909                 // To ensure the data integrity we do it in an transaction
 910                 DBA::transaction();
 911
 912                 // We cannot simply expand the condition to check for origin entries
 913                 // The condition needn't to be a simple array but could be a complex condition.
 914                 // And we have to execute this query before the update to ensure to fetch the same data.
 915                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 916
 917                 $content_fields = [];
 918                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 919                         if (isset($fields[$field])) {
 920                                 $content_fields[$field] = $fields[$field];
 921                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 922                                         unset($fields[$field]);
 923                                 } else {
 924                                         $fields[$field] = null;
 925                                 }
 926                         }
 927                 }
 928
 929                 $delivery_data = ItemDeliveryData::extractFields($fields);
 930
 931                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 932                 foreach ($clear_fields as $field) {
 933                         if (array_key_exists($field, $fields)) {
 934                                 $fields[$field] = null;
 935                         }
 936                 }
 937
 938                 if (array_key_exists('tag', $fields)) {
 939                         $tags = $fields['tag'];
 940                         $fields['tag'] = null;
 941                 } else {
 942                         $tags = null;
 943                 }
 944
 945                 if (array_key_exists('file', $fields)) {
 946                         $files = $fields['file'];
 947                         $fields['file'] = null;
 948                 } else {
 949                         $files = null;
 950                 }
 951
 952                 if (!empty($fields)) {
 953                         $success = DBA::update('item', $fields, $condition);
 954
 955                         if (!$success) {
 956                                 DBA::close($items);
 957                                 DBA::rollback();
 958                                 return false;
 959                         }
 960                 }
 961
 962                 // When there is no content for the "old" item table, this will count the fetched items
 963                 $rows = DBA::affectedRows();
 964
 965                 $notify_items = [];
 966
 967                 while ($item = DBA::fetch($items)) {
 968                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 969                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 970
 971                                 if (empty($item['iaid'])) {
 972                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 973                                         if (DBA::isResult($item_activity)) {
 974                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 975                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 976                                                         if (self::isLegacyMode()) {
 977                                                                 $item_fields[$field] = null;
 978                                                         } else {
 979                                                                 unset($item_fields[$field]);
 980                                                         }
 981                                                 }
 982                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 983
 984                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 985                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 986                                                 }
 987                                         }
 988                                 } elseif (!empty($item['icid'])) {
 989                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 990
 991                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 992                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 993                                         }
 994                                 }
 995                         } else {
 996                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 997
 998                                 if (empty($item['icid'])) {
 999                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
1000                                         if (DBA::isResult($item_content)) {
1001                                                 $item_fields = ['icid' => $item_content['id']];
1002                                                 // Clear all fields in the item table that have a content in the item-content table
1003                                                 foreach ($item_content as $field => $content) {
1004                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1005                                                                 if (self::isLegacyMode()) {
1006                                                                         $item_fields[$field] = null;
1007                                                                 } else {
1008                                                                         unset($item_fields[$field]);
1009                                                                 }
1010                                                         }
1011                                                 }
1012                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1013                                         }
1014                                 }
1015                         }
1016
1017                         if (!is_null($tags)) {
1018                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1019                                 if (!empty($item['tag'])) {
1020                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1021                                 }
1022                         }
1023
1024                         if (!is_null($files)) {
1025                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1026                                 if (!empty($item['file'])) {
1027                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1028                                 }
1029                         }
1030
1031                         ItemDeliveryData::update($item['id'], $delivery_data);
1032
1033                         self::updateThread($item['id']);
1034
1035                         // We only need to notfiy others when it is an original entry from us.
1036                         // Only call the notifier when the item has some content relevant change.
1037                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1038                                 $notify_items[] = $item['id'];
1039                         }
1040                 }
1041
1042                 DBA::close($items);
1043                 DBA::commit();
1044
1045                 foreach ($notify_items as $notify_item) {
1046                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1047                 }
1048
1049                 return $rows;
1050         }
1051
1052         /**
1053          * @brief Delete an item and notify others about it - if it was ours
1054          *
1055          * @param array   $condition The condition for finding the item entries
1056          * @param integer $priority  Priority for the notification
1057          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1058          */
1059         public static function delete($condition, $priority = PRIORITY_HIGH)
1060         {
1061                 $items = self::select(['id'], $condition);
1062                 while ($item = self::fetch($items)) {
1063                         self::deleteById($item['id'], $priority);
1064                 }
1065                 DBA::close($items);
1066         }
1067
1068         /**
1069          * @brief Delete an item for an user and notify others about it - if it was ours
1070          *
1071          * @param array   $condition The condition for finding the item entries
1072          * @param integer $uid       User who wants to delete this item
1073          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1074          */
1075         public static function deleteForUser($condition, $uid)
1076         {
1077                 if ($uid == 0) {
1078                         return;
1079                 }
1080
1081                 $items = self::select(['id', 'uid'], $condition);
1082                 while ($item = self::fetch($items)) {
1083                         // "Deleting" global items just means hiding them
1084                         if ($item['uid'] == 0) {
1085                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1086
1087                                 // Delete notifications
1088                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1089                         } elseif ($item['uid'] == $uid) {
1090                                 self::deleteById($item['id'], PRIORITY_HIGH);
1091                         } else {
1092                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1093                         }
1094                 }
1095                 DBA::close($items);
1096         }
1097
1098         /**
1099          * @brief Delete an item and notify others about it - if it was ours
1100          *
1101          * @param integer $item_id  Item ID that should be delete
1102          * @param integer $priority Priority for the notification
1103          *
1104          * @return boolean success
1105          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1106          */
1107         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
1108         {
1109                 // locate item to be deleted
1110                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1111                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1112                         'verb', 'object-type', 'object', 'target', 'contact-id',
1113                         'icid', 'iaid', 'psid'];
1114                 $item = self::selectFirst($fields, ['id' => $item_id]);
1115                 if (!DBA::isResult($item)) {
1116                         Logger::log('Item with ID ' . $item_id . " hasn't been found.", Logger::DEBUG);
1117                         return false;
1118                 }
1119
1120                 if ($item['deleted']) {
1121                         Logger::log('Item with ID ' . $item_id . ' has already been deleted.', Logger::DEBUG);
1122                         return false;
1123                 }
1124
1125                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1126                 if (!DBA::isResult($parent)) {
1127                         $parent = ['origin' => false];
1128                 }
1129
1130                 // clean up categories and tags so they don't end up as orphans
1131
1132                 $matches = false;
1133                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1134
1135                 if ($cnt) {
1136                         foreach ($matches as $mtch) {
1137                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1138                         }
1139                 }
1140
1141                 $matches = false;
1142
1143                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1144
1145                 if ($cnt) {
1146                         foreach ($matches as $mtch) {
1147                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1148                         }
1149                 }
1150
1151                 /*
1152                  * If item is a link to a photo resource, nuke all the associated photos
1153                  * (visitors will not have photo resources)
1154                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1155                  * generate a resource-id and therefore aren't intimately linked to the item.
1156                  */
1157                 /// @TODO: this should first check if photo is used elsewhere
1158                 if (strlen($item['resource-id'])) {
1159                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1160                 }
1161
1162                 // If item is a link to an event, delete the event.
1163                 if (intval($item['event-id'])) {
1164                         Event::delete($item['event-id']);
1165                 }
1166
1167                 // If item has attachments, drop them
1168                 /// @TODO: this should first check if attachment is used elsewhere
1169                 foreach (explode(",", $item['attach']) as $attach) {
1170                         preg_match("|attach/(\d+)|", $attach, $matches);
1171                         if (is_array($matches) && count($matches) > 1) {
1172                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1173                         }
1174                 }
1175
1176                 // Delete tags that had been attached to other items
1177                 self::deleteTagsFromItem($item);
1178
1179                 // Delete notifications
1180                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1181
1182                 // Set the item to "deleted"
1183                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1184                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1185
1186                 Term::insertFromTagFieldByItemId($item['id'], '');
1187                 Term::insertFromFileFieldByItemId($item['id'], '');
1188                 self::deleteThread($item['id'], $item['parent-uri']);
1189
1190                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1191                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1192                 }
1193
1194                 ItemDeliveryData::delete($item['id']);
1195
1196                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1197
1198                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1199                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1200                 }
1201                 // When the permission set will be used in photo and events as well,
1202                 // this query here needs to be extended.
1203                 // @todo Currently deactivated. We need the permission set in the deletion process.
1204                 // This is a reminder to add the removal somewhere else.
1205                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1206                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1207                 //}
1208
1209                 // If it's the parent of a comment thread, kill all the kids
1210                 if ($item['id'] == $item['parent']) {
1211                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1212                 }
1213
1214                 // Is it our comment and/or our thread?
1215                 if ($item['origin'] || $parent['origin']) {
1216
1217                         // When we delete the original post we will delete all existing copies on the server as well
1218                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1219
1220                         // send the notification upstream/downstream
1221                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1222                 } elseif ($item['uid'] != 0) {
1223
1224                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1225                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1226                         if (DBA::isResult($global_item)) {
1227                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1228                         }
1229                 }
1230
1231                 Logger::log('Item with ID ' . $item_id . " has been deleted.", Logger::DEBUG);
1232
1233                 return true;
1234         }
1235
1236         private static function deleteTagsFromItem($item)
1237         {
1238                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1239                         return;
1240                 }
1241
1242                 $xo = XML::parseString($item["object"], false);
1243                 $xt = XML::parseString($item["target"], false);
1244
1245                 if ($xt->type != Activity\ObjectType::NOTE) {
1246                         return;
1247                 }
1248
1249                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1250                 if (!DBA::isResult($i)) {
1251                         return;
1252                 }
1253
1254                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1255                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1256                 $author_copy = $item["origin"];
1257
1258                 if (($owner_remove && $author_copy) || !$owner_remove) {
1259                         return;
1260                 }
1261
1262                 $tags = explode(',', $i["tag"]);
1263                 $newtags = [];
1264                 if (count($tags)) {
1265                         foreach ($tags as $tag) {
1266                                 if (trim($tag) !== trim($xo->body)) {
1267                                        $newtags[] = trim($tag);
1268                                 }
1269                         }
1270                 }
1271                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1272         }
1273
1274         private static function guid($item, $notify)
1275         {
1276                 if (!empty($item['guid'])) {
1277                         return Strings::escapeTags(trim($item['guid']));
1278                 }
1279
1280                 if ($notify) {
1281                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1282                         // We add the hash of our own host because our host is the original creator of the post.
1283                         $prefix_host = \get_app()->getHostName();
1284                 } else {
1285                         $prefix_host = '';
1286
1287                         // We are only storing the post so we create a GUID from the original hostname.
1288                         if (!empty($item['author-link'])) {
1289                                 $parsed = parse_url($item['author-link']);
1290                                 if (!empty($parsed['host'])) {
1291                                         $prefix_host = $parsed['host'];
1292                                 }
1293                         }
1294
1295                         if (empty($prefix_host) && !empty($item['plink'])) {
1296                                 $parsed = parse_url($item['plink']);
1297                                 if (!empty($parsed['host'])) {
1298                                         $prefix_host = $parsed['host'];
1299                                 }
1300                         }
1301
1302                         if (empty($prefix_host) && !empty($item['uri'])) {
1303                                 $parsed = parse_url($item['uri']);
1304                                 if (!empty($parsed['host'])) {
1305                                         $prefix_host = $parsed['host'];
1306                                 }
1307                         }
1308
1309                         // Is it in the format data@host.tld? - Used for mail contacts
1310                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1311                                 $mailparts = explode('@', $item['author-link']);
1312                                 $prefix_host = array_pop($mailparts);
1313                         }
1314                 }
1315
1316                 if (!empty($item['plink'])) {
1317                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1318                 } elseif (!empty($item['uri'])) {
1319                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1320                 } else {
1321                         $guid = System::createUUID(hash('crc32', $prefix_host));
1322                 }
1323
1324                 return $guid;
1325         }
1326
1327         private static function contactId($item)
1328         {
1329                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1330                         return $item['contact-id'];
1331                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1332                         return $item['contact-id'];
1333                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1334                         return $item['author-id'];
1335                 } elseif (!empty($item['contact-id'])) {
1336                         return $item['contact-id'];
1337                 } else {
1338                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1339                         if (!empty($contact_id)) {
1340                                 return $contact_id;
1341                         }
1342                 }
1343                 return $item['author-id'];
1344         }
1345
1346         // This function will finally cover most of the preparation functionality in mod/item.php
1347         public static function prepare(&$item)
1348         {
1349                 /*
1350                  * @TODO: Unused code triggering inspection errors
1351                  *
1352                 $data = BBCode::getAttachmentData($item['body']);
1353                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1354                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1355                         $posttype = Item::PT_PAGE;
1356                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1357                 }
1358                  */
1359         }
1360
1361         /**
1362          * Write an item array into a spool file to be inserted later.
1363          * This command is called whenever there are issues storing an item.
1364          *
1365          * @param array $item The item fields that are to be inserted
1366          * @throws \Exception
1367          */
1368         private static function spool($orig_item)
1369         {
1370                 // Now we store the data in the spool directory
1371                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1372                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1373
1374                 $spoolpath = get_spoolpath();
1375                 if ($spoolpath != "") {
1376                         $spool = $spoolpath . '/' . $file;
1377
1378                         file_put_contents($spool, json_encode($orig_item));
1379                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1380                 }
1381         }
1382
1383         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1384         {
1385                 $orig_item = $item;
1386
1387                 $priority = PRIORITY_HIGH;
1388
1389                 // If it is a posting where users should get notifications, then define it as wall posting
1390                 if ($notify) {
1391                         $item['wall'] = 1;
1392                         $item['origin'] = 1;
1393                         $item['network'] = Protocol::DFRN;
1394                         $item['protocol'] = Conversation::PARCEL_DFRN;
1395
1396                         if (is_int($notify)) {
1397                                 $priority = $notify;
1398                         }
1399                 } else {
1400                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1401                 }
1402
1403                 $item['guid'] = self::guid($item, $notify);
1404                 $item['uri'] = Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid'])));
1405
1406                 // Store URI data
1407                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1408
1409                 // Store conversation data
1410                 $item = Conversation::insert($item);
1411
1412                 /*
1413                  * If a Diaspora signature structure was passed in, pull it out of the
1414                  * item array and set it aside for later storage.
1415                  */
1416
1417                 $dsprsig = null;
1418                 if (isset($item['dsprsig'])) {
1419                         $encoded_signature = $item['dsprsig'];
1420                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1421                         unset($item['dsprsig']);
1422                 }
1423
1424                 $diaspora_signed_text = '';
1425                 if (isset($item['diaspora_signed_text'])) {
1426                         $diaspora_signed_text = $item['diaspora_signed_text'];
1427                         unset($item['diaspora_signed_text']);
1428                 }
1429
1430                 // Converting the plink
1431                 /// @TODO Check if this is really still needed
1432                 if ($item['network'] == Protocol::OSTATUS) {
1433                         if (isset($item['plink'])) {
1434                                 $item['plink'] = OStatus::convertHref($item['plink']);
1435                         } elseif (isset($item['uri'])) {
1436                                 $item['plink'] = OStatus::convertHref($item['uri']);
1437                         }
1438                 }
1439
1440                 if (!empty($item['thr-parent'])) {
1441                         $item['parent-uri'] = $item['thr-parent'];
1442                 }
1443
1444                 /** @var Activity $activity */
1445                 $activity = self::getClass(Activity::class);
1446
1447                 if (isset($item['gravity'])) {
1448                         $item['gravity'] = intval($item['gravity']);
1449                 } elseif ($item['parent-uri'] === $item['uri']) {
1450                         $item['gravity'] = GRAVITY_PARENT;
1451                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1452                         $item['gravity'] = GRAVITY_COMMENT;
1453                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1454                         $item['gravity'] = GRAVITY_ACTIVITY;
1455                 } else {
1456                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1457                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1458                 }
1459
1460                 $uid = intval($item['uid']);
1461
1462                 // check for create date and expire time
1463                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1464
1465                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1466                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1467                         $expire_interval = $user['expire'];
1468                 }
1469
1470                 if (($expire_interval > 0) && !empty($item['created'])) {
1471                         $expire_date = time() - ($expire_interval * 86400);
1472                         $created_date = strtotime($item['created']);
1473                         if ($created_date < $expire_date) {
1474                                 Logger::notice('Item created before expiration interval.', [
1475                                         'created' => date('c', $created_date),
1476                                         'expired' => date('c', $expire_date),
1477                                         '$item' => $item
1478                                 ]);
1479                                 return 0;
1480                         }
1481                 }
1482
1483                 /*
1484                  * Do we already have this item?
1485                  * We have to check several networks since Friendica posts could be repeated
1486                  * via OStatus (maybe Diasporsa as well)
1487                  */
1488                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1489                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1490                                 trim($item['uri']), $item['uid'],
1491                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1492                         $existing = self::selectFirst(['id', 'network'], $condition);
1493                         if (DBA::isResult($existing)) {
1494                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1495                                 if ($uid != 0) {
1496                                         Logger::notice('Item already existed for user', [
1497                                                 'uri' => $item['uri'],
1498                                                 'uid' => $uid,
1499                                                 'network' => $item['network'],
1500                                                 'existing_id' => $existing["id"],
1501                                                 'existing_network' => $existing["network"]
1502                                         ]);
1503                                 }
1504
1505                                 return $existing["id"];
1506                         }
1507                 }
1508
1509                 $item['wall']          = intval($item['wall'] ?? 0);
1510                 $item['extid']         = trim($item['extid'] ?? '');
1511                 $item['author-name']   = trim($item['author-name'] ?? '');
1512                 $item['author-link']   = trim($item['author-link'] ?? '');
1513                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1514                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1515                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1516                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1517                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1518                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1519                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1520                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1521                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1522                 $item['title']         = trim($item['title'] ?? '');
1523                 $item['location']      = trim($item['location'] ?? '');
1524                 $item['coord']         = trim($item['coord'] ?? '');
1525                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1526                 $item['deleted']       = 0;
1527                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1528                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1529                 $item['verb']          = trim($item['verb'] ?? '');
1530                 $item['object-type']   = trim($item['object-type'] ?? '');
1531                 $item['object']        = trim($item['object'] ?? '');
1532                 $item['target-type']   = trim($item['target-type'] ?? '');
1533                 $item['target']        = trim($item['target'] ?? '');
1534                 $item['plink']         = trim($item['plink'] ?? '');
1535                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1536                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1537                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1538                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1539                 $item['private']       = intval($item['private'] ?? 0);
1540                 $item['body']          = trim($item['body'] ?? '');
1541                 $item['tag']           = trim($item['tag'] ?? '');
1542                 $item['attach']        = trim($item['attach'] ?? '');
1543                 $item['app']           = trim($item['app'] ?? '');
1544                 $item['origin']        = intval($item['origin'] ?? 0);
1545                 $item['postopts']      = trim($item['postopts'] ?? '');
1546                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1547                 $item['event-id']      = intval($item['event-id'] ?? 0);
1548                 $item['inform']        = trim($item['inform'] ?? '');
1549                 $item['file']          = trim($item['file'] ?? '');
1550
1551                 // When there is no content then we don't post it
1552                 if ($item['body'].$item['title'] == '') {
1553                         Logger::notice('No body, no title.');
1554                         return 0;
1555                 }
1556
1557                 self::addLanguageToItemArray($item);
1558
1559                 // Items cannot be stored before they happen ...
1560                 if ($item['created'] > DateTimeFormat::utcNow()) {
1561                         $item['created'] = DateTimeFormat::utcNow();
1562                 }
1563
1564                 // We haven't invented time travel by now.
1565                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1566                         $item['edited'] = DateTimeFormat::utcNow();
1567                 }
1568
1569                 $item['plink'] = ($item['plink'] ?? '') ?: System::baseUrl() . '/display/' . urlencode($item['guid']);
1570
1571                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1572                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1573
1574                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1575
1576                 if (Contact::isBlocked($item['author-id'])) {
1577                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1578                         return 0;
1579                 }
1580
1581                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1582                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1583                         return 0;
1584                 }
1585
1586                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1587                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1588                         return 0;
1589                 }
1590
1591                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1592                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1593
1594                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1595
1596                 if (Contact::isBlocked($item['owner-id'])) {
1597                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1598                         return 0;
1599                 }
1600
1601                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1602                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1603                         return 0;
1604                 }
1605
1606                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1607                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1608                         return 0;
1609                 }
1610
1611                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1612                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1613                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1614                         return 0;
1615                 }
1616
1617                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1618                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1619                         return 0;
1620                 }
1621
1622                 // We don't store the causer, we only have it here for the checks above
1623                 unset($item['causer-id']);
1624                 unset($item['causer-link']);
1625
1626                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1627                 $item["contact-id"] = self::contactId($item);
1628
1629                 if ($item['network'] == Protocol::PHANTOM) {
1630                         $item['network'] = Protocol::DFRN;
1631                         Logger::notice('Missing network, setting to {network}.', [
1632                                 'uri' => $item["uri"],
1633                                 'network' => $item['network'],
1634                                 'callstack' => System::callstack()
1635                         ]);
1636                 }
1637
1638                 // Checking if there is already an item with the same guid
1639                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1640                 if (self::exists($condition)) {
1641                         Logger::notice('Found already existing item', [
1642                                 'guid' => $item['guid'],
1643                                 'uid' => $item['uid'],
1644                                 'network' => $item['network']
1645                         ]);
1646                         return 0;
1647                 }
1648
1649                 if ($item['verb'] == Activity::FOLLOW) {
1650                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1651                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1652                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1653                                 return 0;
1654                         }
1655
1656                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1657                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1658                         if (self::exists($condition)) {
1659                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1660                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1661                                 return 0;
1662                         }
1663                 }
1664
1665                 // Check for hashtags in the body and repair or add hashtag links
1666                 self::setHashtags($item);
1667
1668                 $item['thr-parent'] = $item['parent-uri'];
1669
1670                 $notify_type = Delivery::POST;
1671                 $allow_cid = '';
1672                 $allow_gid = '';
1673                 $deny_cid  = '';
1674                 $deny_gid  = '';
1675
1676                 if ($item['parent-uri'] === $item['uri']) {
1677                         $parent_id = 0;
1678                         $parent_deleted = 0;
1679                         $allow_cid = $item['allow_cid'];
1680                         $allow_gid = $item['allow_gid'];
1681                         $deny_cid  = $item['deny_cid'];
1682                         $deny_gid  = $item['deny_gid'];
1683                 } else {
1684                         // find the parent and snarf the item id and ACLs
1685                         // and anything else we need to inherit
1686
1687                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1688                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1689                                 'wall', 'private', 'forum_mode', 'origin'];
1690                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1691                         $params = ['order' => ['id' => false]];
1692                         $parent = self::selectFirst($fields, $condition, $params);
1693
1694                         if (DBA::isResult($parent)) {
1695                                 // is the new message multi-level threaded?
1696                                 // even though we don't support it now, preserve the info
1697                                 // and re-attach to the conversation parent.
1698
1699                                 if ($parent['uri'] != $parent['parent-uri']) {
1700                                         $item['parent-uri'] = $parent['parent-uri'];
1701
1702                                         $condition = ['uri' => $item['parent-uri'],
1703                                                 'parent-uri' => $item['parent-uri'],
1704                                                 'uid' => $item['uid']];
1705                                         $params = ['order' => ['id' => false]];
1706                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1707
1708                                         if (DBA::isResult($toplevel_parent)) {
1709                                                 $parent = $toplevel_parent;
1710                                         }
1711                                 }
1712
1713                                 $parent_id      = $parent['id'];
1714                                 $parent_deleted = $parent['deleted'];
1715                                 $allow_cid      = $parent['allow_cid'];
1716                                 $allow_gid      = $parent['allow_gid'];
1717                                 $deny_cid       = $parent['deny_cid'];
1718                                 $deny_gid       = $parent['deny_gid'];
1719                                 $item['wall']   = $parent['wall'];
1720
1721                                 /*
1722                                  * If the parent is private, force privacy for the entire conversation
1723                                  * This differs from the above settings as it subtly allows comments from
1724                                  * email correspondents to be private even if the overall thread is not.
1725                                  */
1726                                 if ($parent['private']) {
1727                                         $item['private'] = $parent['private'];
1728                                 }
1729
1730                                 /*
1731                                  * Edge case. We host a public forum that was originally posted to privately.
1732                                  * The original author commented, but as this is a comment, the permissions
1733                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1734                                  */
1735                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1736                                         $item['private'] = 0;
1737                                 }
1738
1739                                 // If its a post that originated here then tag the thread as "mention"
1740                                 if ($item['origin'] && $item['uid']) {
1741                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1742                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1743                                 }
1744                         } else {
1745                                 /*
1746                                  * Allow one to see reply tweets from status.net even when
1747                                  * we don't have or can't see the original post.
1748                                  */
1749                                 if ($force_parent) {
1750                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1751                                         $parent_id = 0;
1752                                         $item['parent-uri'] = $item['uri'];
1753                                         $item['gravity'] = GRAVITY_PARENT;
1754                                 } else {
1755                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1756                                         return 0;
1757                                 }
1758
1759                                 $parent_deleted = 0;
1760                         }
1761                 }
1762
1763                 if (stristr($item['verb'], Activity::POKE)) {
1764                         $notify_type = Delivery::POKE;
1765                 }
1766
1767                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1768                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1769
1770                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1771                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1772                 if (self::exists($condition)) {
1773                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1774                         return 0;
1775                 }
1776
1777                 // On Friendica and Diaspora the GUID is unique
1778                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1779                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1780                         if (self::exists($condition)) {
1781                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1782                                 return 0;
1783                         }
1784                 } elseif ($item['network'] == Protocol::OSTATUS) {
1785                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1786                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1787                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1788                         if (self::exists($condition)) {
1789                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1790                                 return 0;
1791                         }
1792                 }
1793
1794                 // Is this item available in the global items (with uid=0)?
1795                 if ($item["uid"] == 0) {
1796                         $item["global"] = true;
1797
1798                         // Set the global flag on all items if this was a global item entry
1799                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1800                 } else {
1801                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1802                 }
1803
1804                 // ACL settings
1805                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1806                         $private = 1;
1807                 } else {
1808                         $private = $item['private'];
1809                 }
1810
1811                 $item["allow_cid"] = $allow_cid;
1812                 $item["allow_gid"] = $allow_gid;
1813                 $item["deny_cid"] = $deny_cid;
1814                 $item["deny_gid"] = $deny_gid;
1815                 $item["private"] = $private;
1816                 $item["deleted"] = $parent_deleted;
1817
1818                 // Fill the cache field
1819                 self::putInCache($item);
1820
1821                 if ($notify) {
1822                         $item['edit'] = false;
1823                         $item['parent'] = $parent_id;
1824                         Hook::callAll('post_local', $item);
1825                         unset($item['edit']);
1826                         unset($item['parent']);
1827                 } else {
1828                         Hook::callAll('post_remote', $item);
1829                 }
1830
1831                 // This array field is used to trigger some automatic reactions
1832                 // It is mainly used in the "post_local" hook.
1833                 unset($item['api_source']);
1834
1835                 if (!empty($item['cancel'])) {
1836                         Logger::log('post cancelled by addon.');
1837                         return 0;
1838                 }
1839
1840                 /*
1841                  * Check for already added items.
1842                  * There is a timing issue here that sometimes creates double postings.
1843                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1844                  */
1845                 if ($item["uid"] == 0) {
1846                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1847                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1848                                 return 0;
1849                         }
1850                 }
1851
1852                 Logger::log('' . print_r($item,true), Logger::DATA);
1853
1854                 if (array_key_exists('tag', $item)) {
1855                         $tags = $item['tag'];
1856                         unset($item['tag']);
1857                 } else {
1858                         $tags = '';
1859                 }
1860
1861                 if (array_key_exists('file', $item)) {
1862                         $files = $item['file'];
1863                         unset($item['file']);
1864                 } else {
1865                         $files = '';
1866                 }
1867
1868                 // Creates or assigns the permission set
1869                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1870
1871                 // We are doing this outside of the transaction to avoid timing problems
1872                 if (!self::insertActivity($item)) {
1873                         self::insertContent($item);
1874                 }
1875
1876                 $delivery_data = ItemDeliveryData::extractFields($item);
1877
1878                 unset($item['postopts']);
1879                 unset($item['inform']);
1880
1881                 // These fields aren't stored anymore in the item table, they are fetched upon request
1882                 unset($item['author-link']);
1883                 unset($item['author-name']);
1884                 unset($item['author-avatar']);
1885                 unset($item['author-network']);
1886
1887                 unset($item['owner-link']);
1888                 unset($item['owner-name']);
1889                 unset($item['owner-avatar']);
1890
1891                 $like_no_comment = Config::get('system', 'like_no_comment');
1892
1893                 DBA::transaction();
1894                 $ret = DBA::insert('item', $item);
1895
1896                 // When the item was successfully stored we fetch the ID of the item.
1897                 if (DBA::isResult($ret)) {
1898                         $current_post = DBA::lastInsertId();
1899                 } else {
1900                         // This can happen - for example - if there are locking timeouts.
1901                         DBA::rollback();
1902
1903                         // Store the data into a spool file so that we can try again later.
1904                         self::spool($orig_item);
1905                         return 0;
1906                 }
1907
1908                 if ($current_post == 0) {
1909                         // This is one of these error messages that never should occur.
1910                         Logger::log("couldn't find created item - we better quit now.");
1911                         DBA::rollback();
1912                         return 0;
1913                 }
1914
1915                 // How much entries have we created?
1916                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1917                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1918
1919                 if ($entries > 1) {
1920                         // There are duplicates. We delete our just created entry.
1921                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1922
1923                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1924                         DBA::delete('item', ['id' => $current_post]);
1925                         DBA::commit();
1926                         return 0;
1927                 } elseif ($entries == 0) {
1928                         // This really should never happen since we quit earlier if there were problems.
1929                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1930                         DBA::rollback();
1931                         return 0;
1932                 }
1933
1934                 Logger::log('created item '.$current_post);
1935
1936                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1937                         $parent_id = $current_post;
1938                 }
1939
1940                 // Set parent id
1941                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1942
1943                 $item['id'] = $current_post;
1944                 $item['parent'] = $parent_id;
1945
1946                 // update the commented timestamp on the parent
1947                 // Only update "commented" if it is really a comment
1948                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1949                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1950                 } else {
1951                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1952                 }
1953
1954                 if ($dsprsig) {
1955                         /*
1956                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1957                          * We can check for this condition when we decode and encode the stuff again.
1958                          */
1959                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1960                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1961                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1962                         }
1963
1964                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1965                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1966                         } else {
1967                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1968                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1969                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1970                         }
1971                 }
1972
1973                 if (!empty($diaspora_signed_text)) {
1974                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1975                 }
1976
1977                 if ($item['parent-uri'] === $item['uri']) {
1978                         self::addThread($current_post);
1979                 } else {
1980                         self::updateThread($parent_id);
1981                 }
1982
1983                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1984                         ItemDeliveryData::insert($current_post, $delivery_data);
1985                 }
1986
1987                 DBA::commit();
1988
1989                 /*
1990                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1991                  * This is not perfect - but a workable solution until we found the reason for the problem.
1992                  */
1993                 if (!empty($tags)) {
1994                         Term::insertFromTagFieldByItemId($current_post, $tags);
1995                 }
1996
1997                 if (!empty($files)) {
1998                         Term::insertFromFileFieldByItemId($current_post, $files);
1999                 }
2000
2001                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
2002                 if (self::tagDeliver($item['uid'], $current_post)) {
2003                         // Get the user information for the logging
2004                         $user = User::getById($uid);
2005
2006                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
2007                         return 0;
2008                 }
2009
2010                 if (!$dontcache) {
2011                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2012                         if (DBA::isResult($posted_item)) {
2013                                 if ($notify) {
2014                                         Hook::callAll('post_local_end', $posted_item);
2015                                 } else {
2016                                         Hook::callAll('post_remote_end', $posted_item);
2017                                 }
2018                         } else {
2019                                 Logger::log('new item not found in DB, id ' . $current_post);
2020                         }
2021                 }
2022
2023                 if ($item['parent-uri'] === $item['uri']) {
2024                         self::addShadow($current_post);
2025                 } else {
2026                         self::addShadowPost($current_post);
2027                 }
2028
2029                 self::updateContact($item);
2030
2031                 check_user_notification($current_post);
2032
2033                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2034                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2035                 }
2036
2037                 return $current_post;
2038         }
2039
2040         /**
2041          * @brief Insert a new item content entry
2042          *
2043          * @param array $item The item fields that are to be inserted
2044          * @return bool
2045          * @throws \Exception
2046          */
2047         private static function insertActivity(&$item)
2048         {
2049                 $activity_index = self::activityToIndex($item['verb']);
2050
2051                 if ($activity_index < 0) {
2052                         return false;
2053                 }
2054
2055                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2056
2057                 // We just remove everything that is content
2058                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2059                         unset($item[$field]);
2060                 }
2061
2062                 // To avoid timing problems, we are using locks.
2063                 $locked = Lock::acquire('item_insert_activity');
2064                 if (!$locked) {
2065                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2066                 }
2067
2068                 // Do we already have this content?
2069                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2070                 if (DBA::isResult($item_activity)) {
2071                         $item['iaid'] = $item_activity['id'];
2072                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2073                 } elseif (DBA::insert('item-activity', $fields)) {
2074                         $item['iaid'] = DBA::lastInsertId();
2075                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2076                 } else {
2077                         // This shouldn't happen.
2078                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2079                         Lock::release('item_insert_activity');
2080                         return false;
2081                 }
2082                 if ($locked) {
2083                         Lock::release('item_insert_activity');
2084                 }
2085                 return true;
2086         }
2087
2088         /**
2089          * @brief Insert a new item content entry
2090          *
2091          * @param array $item The item fields that are to be inserted
2092          * @throws \Exception
2093          */
2094         private static function insertContent(&$item)
2095         {
2096                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2097
2098                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2099                         if (isset($item[$field])) {
2100                                 $fields[$field] = $item[$field];
2101                                 unset($item[$field]);
2102                         }
2103                 }
2104
2105                 // To avoid timing problems, we are using locks.
2106                 $locked = Lock::acquire('item_insert_content');
2107                 if (!$locked) {
2108                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2109                 }
2110
2111                 // Do we already have this content?
2112                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2113                 if (DBA::isResult($item_content)) {
2114                         $item['icid'] = $item_content['id'];
2115                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2116                 } elseif (DBA::insert('item-content', $fields)) {
2117                         $item['icid'] = DBA::lastInsertId();
2118                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2119                 } else {
2120                         // This shouldn't happen.
2121                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2122                 }
2123                 if ($locked) {
2124                         Lock::release('item_insert_content');
2125                 }
2126         }
2127
2128         /**
2129          * @brief Update existing item content entries
2130          *
2131          * @param array $item      The item fields that are to be changed
2132          * @param array $condition The condition for finding the item content entries
2133          * @return bool
2134          * @throws \Exception
2135          */
2136         private static function updateActivity($item, $condition)
2137         {
2138                 if (empty($item['verb'])) {
2139                         return false;
2140                 }
2141                 $activity_index = self::activityToIndex($item['verb']);
2142
2143                 if ($activity_index < 0) {
2144                         return false;
2145                 }
2146
2147                 $fields = ['activity' => $activity_index];
2148
2149                 Logger::log('Update activity for ' . json_encode($condition));
2150
2151                 DBA::update('item-activity', $fields, $condition, true);
2152
2153                 return true;
2154         }
2155
2156         /**
2157          * @brief Update existing item content entries
2158          *
2159          * @param array $item      The item fields that are to be changed
2160          * @param array $condition The condition for finding the item content entries
2161          * @throws \Exception
2162          */
2163         private static function updateContent($item, $condition)
2164         {
2165                 // We have to select only the fields from the "item-content" table
2166                 $fields = [];
2167                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2168                         if (isset($item[$field])) {
2169                                 $fields[$field] = $item[$field];
2170                         }
2171                 }
2172
2173                 if (empty($fields)) {
2174                         // when there are no fields at all, just use the condition
2175                         // This is to ensure that we always store content.
2176                         $fields = $condition;
2177                 }
2178
2179                 Logger::log('Update content for ' . json_encode($condition));
2180
2181                 DBA::update('item-content', $fields, $condition, true);
2182         }
2183
2184         /**
2185          * @brief Distributes public items to the receivers
2186          *
2187          * @param integer $itemid      Item ID that should be added
2188          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2189          * @throws \Exception
2190          */
2191         public static function distribute($itemid, $signed_text = '')
2192         {
2193                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2194                 $parent = self::selectFirst(['owner-id'], $condition);
2195                 if (!DBA::isResult($parent)) {
2196                         return;
2197                 }
2198
2199                 // Only distribute public items from native networks
2200                 $condition = ['id' => $itemid, 'uid' => 0,
2201                         'network' => array_merge(Protocol::FEDERATED ,['']),
2202                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2203                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2204                 if (!DBA::isResult($item)) {
2205                         return;
2206                 }
2207
2208                 $origin = $item['origin'];
2209
2210                 unset($item['id']);
2211                 unset($item['parent']);
2212                 unset($item['mention']);
2213                 unset($item['wall']);
2214                 unset($item['origin']);
2215                 unset($item['starred']);
2216
2217                 $users = [];
2218
2219                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2220                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2221                 if (!DBA::isResult($owner)) {
2222                         return;
2223                 }
2224
2225                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2226                 $contacts = DBA::select('contact', ['uid'], $condition);
2227                 while ($contact = DBA::fetch($contacts)) {
2228                         if ($contact['uid'] == 0) {
2229                                 continue;
2230                         }
2231
2232                         $users[$contact['uid']] = $contact['uid'];
2233                 }
2234                 DBA::close($contacts);
2235
2236                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2237                 $contacts = DBA::select('contact', ['uid'], $condition);
2238                 while ($contact = DBA::fetch($contacts)) {
2239                         if ($contact['uid'] == 0) {
2240                                 continue;
2241                         }
2242
2243                         $users[$contact['uid']] = $contact['uid'];
2244                 }
2245                 DBA::close($contacts);
2246
2247                 if (!empty($owner['alias'])) {
2248                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2249                         $contacts = DBA::select('contact', ['uid'], $condition);
2250                         while ($contact = DBA::fetch($contacts)) {
2251                                 if ($contact['uid'] == 0) {
2252                                         continue;
2253                                 }
2254
2255                                 $users[$contact['uid']] = $contact['uid'];
2256                         }
2257                         DBA::close($contacts);
2258                 }
2259
2260                 $origin_uid = 0;
2261
2262                 if ($item['uri'] != $item['parent-uri']) {
2263                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2264                         while ($parent = self::fetch($parents)) {
2265                                 $users[$parent['uid']] = $parent['uid'];
2266                                 if ($parent['origin'] && !$origin) {
2267                                         $origin_uid = $parent['uid'];
2268                                 }
2269                         }
2270                 }
2271
2272                 foreach ($users as $uid) {
2273                         if ($origin_uid == $uid) {
2274                                 $item['diaspora_signed_text'] = $signed_text;
2275                         }
2276                         self::storeForUser($itemid, $item, $uid);
2277                 }
2278         }
2279
2280         /**
2281          * @brief Store public items for the receivers
2282          *
2283          * @param integer $itemid Item ID that should be added
2284          * @param array   $item   The item entry that will be stored
2285          * @param integer $uid    The user that will receive the item entry
2286          * @throws \Exception
2287          */
2288         private static function storeForUser($itemid, $item, $uid)
2289         {
2290                 $item['uid'] = $uid;
2291                 $item['origin'] = 0;
2292                 $item['wall'] = 0;
2293                 if ($item['uri'] == $item['parent-uri']) {
2294                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2295                 } else {
2296                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2297                 }
2298
2299                 if (empty($item['contact-id'])) {
2300                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2301                         if (!DBA::isResult($self)) {
2302                                 return;
2303                         }
2304                         $item['contact-id'] = $self['id'];
2305                 }
2306
2307                 /// @todo Handling of "event-id"
2308
2309                 $notify = false;
2310                 if ($item['uri'] == $item['parent-uri']) {
2311                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2312                         if (DBA::isResult($contact)) {
2313                                 $notify = self::isRemoteSelf($contact, $item);
2314                         }
2315                 }
2316
2317                 $distributed = self::insert($item, false, $notify, true);
2318
2319                 if (!$distributed) {
2320                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2321                 } else {
2322                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2323                 }
2324         }
2325
2326         /**
2327          * @brief Add a shadow entry for a given item id that is a thread starter
2328          *
2329          * We store every public item entry additionally with the user id "0".
2330          * This is used for the community page and for the search.
2331          * It is planned that in the future we will store public item entries only once.
2332          *
2333          * @param integer $itemid Item ID that should be added
2334          * @throws \Exception
2335          */
2336         public static function addShadow($itemid)
2337         {
2338                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2339                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2340                 $item = self::selectFirst($fields, $condition);
2341
2342                 if (!DBA::isResult($item)) {
2343                         return;
2344                 }
2345
2346                 // is it already a copy?
2347                 if (($itemid == 0) || ($item['uid'] == 0)) {
2348                         return;
2349                 }
2350
2351                 // Is it a visible public post?
2352                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2353                         return;
2354                 }
2355
2356                 // is it an entry from a connector? Only add an entry for natively connected networks
2357                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2358                         return;
2359                 }
2360
2361                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2362                         return;
2363                 }
2364
2365                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2366
2367                 if (DBA::isResult($item)) {
2368                         // Preparing public shadow (removing user specific data)
2369                         $item['uid'] = 0;
2370                         unset($item['id']);
2371                         unset($item['parent']);
2372                         unset($item['wall']);
2373                         unset($item['mention']);
2374                         unset($item['origin']);
2375                         unset($item['starred']);
2376                         unset($item['postopts']);
2377                         unset($item['inform']);
2378                         if ($item['uri'] == $item['parent-uri']) {
2379                                 $item['contact-id'] = $item['owner-id'];
2380                         } else {
2381                                 $item['contact-id'] = $item['author-id'];
2382                         }
2383
2384                         $public_shadow = self::insert($item, false, false, true);
2385
2386                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2387                 }
2388         }
2389
2390         /**
2391          * @brief Add a shadow entry for a given item id that is a comment
2392          *
2393          * This function does the same like the function above - but for comments
2394          *
2395          * @param integer $itemid Item ID that should be added
2396          * @throws \Exception
2397          */
2398         public static function addShadowPost($itemid)
2399         {
2400                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2401                 if (!DBA::isResult($item)) {
2402                         return;
2403                 }
2404
2405                 // Is it a toplevel post?
2406                 if ($item['id'] == $item['parent']) {
2407                         self::addShadow($itemid);
2408                         return;
2409                 }
2410
2411                 // Is this a shadow entry?
2412                 if ($item['uid'] == 0) {
2413                         return;
2414                 }
2415
2416                 // Is there a shadow parent?
2417                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2418                         return;
2419                 }
2420
2421                 // Is there already a shadow entry?
2422                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2423                         return;
2424                 }
2425
2426                 // Save "origin" and "parent" state
2427                 $origin = $item['origin'];
2428                 $parent = $item['parent'];
2429
2430                 // Preparing public shadow (removing user specific data)
2431                 $item['uid'] = 0;
2432                 unset($item['id']);
2433                 unset($item['parent']);
2434                 unset($item['wall']);
2435                 unset($item['mention']);
2436                 unset($item['origin']);
2437                 unset($item['starred']);
2438                 unset($item['postopts']);
2439                 unset($item['inform']);
2440                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2441
2442                 $public_shadow = self::insert($item, false, false, true);
2443
2444                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2445
2446                 // If this was a comment to a Diaspora post we don't get our comment back.
2447                 // This means that we have to distribute the comment by ourselves.
2448                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2449                         self::distribute($public_shadow);
2450                 }
2451         }
2452
2453         /**
2454          * Adds a language specification in a "language" element of given $arr.
2455          * Expects "body" element to exist in $arr.
2456          *
2457          * @param $item
2458          * @throws \Text_LanguageDetect_Exception
2459          */
2460         private static function addLanguageToItemArray(&$item)
2461         {
2462                 $naked_body = BBCode::toPlaintext($item['body'], false);
2463
2464                 $ld = new Text_LanguageDetect();
2465                 $ld->setNameMode(2);
2466                 $languages = $ld->detect($naked_body, 3);
2467
2468                 if (is_array($languages)) {
2469                         $item['language'] = json_encode($languages);
2470                 }
2471         }
2472
2473         /**
2474          * @brief Creates an unique guid out of a given uri
2475          *
2476          * @param string $uri uri of an item entry
2477          * @param string $host hostname for the GUID prefix
2478          * @return string unique guid
2479          */
2480         public static function guidFromUri($uri, $host)
2481         {
2482                 // Our regular guid routine is using this kind of prefix as well
2483                 // We have to avoid that different routines could accidentally create the same value
2484                 $parsed = parse_url($uri);
2485
2486                 // We use a hash of the hostname as prefix for the guid
2487                 $guid_prefix = hash("crc32", $host);
2488
2489                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2490                 unset($parsed["scheme"]);
2491
2492                 // Glue it together to be able to make a hash from it
2493                 $host_id = implode("/", $parsed);
2494
2495                 // We could use any hash algorithm since it isn't a security issue
2496                 $host_hash = hash("ripemd128", $host_id);
2497
2498                 return $guid_prefix.$host_hash;
2499         }
2500
2501         /**
2502          * generate an unique URI
2503          *
2504          * @param integer $uid  User id
2505          * @param string  $guid An existing GUID (Otherwise it will be generated)
2506          *
2507          * @return string
2508          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2509          */
2510         public static function newURI($uid, $guid = "")
2511         {
2512                 if ($guid == "") {
2513                         $guid = System::createUUID();
2514                 }
2515
2516                 return self::getApp()->getBaseURL() . '/objects/' . $guid;
2517         }
2518
2519         /**
2520          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2521          *
2522          * This can be used to filter for inactive contacts.
2523          * Only do this for public postings to avoid privacy problems, since poco data is public.
2524          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2525          *
2526          * @param array $arr Contains the just posted item record
2527          * @throws \Exception
2528          */
2529         private static function updateContact($arr)
2530         {
2531                 // Unarchive the author
2532                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2533                 if (DBA::isResult($contact)) {
2534                         Contact::unmarkForArchival($contact);
2535                 }
2536
2537                 // Unarchive the contact if it's not our own contact
2538                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2539                 if (DBA::isResult($contact)) {
2540                         Contact::unmarkForArchival($contact);
2541                 }
2542
2543                 $update = (!$arr['private'] && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2544
2545                 // Is it a forum? Then we don't care about the rules from above
2546                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2547                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2548                                 $update = true;
2549                         }
2550                 }
2551
2552                 if ($update) {
2553                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2554                                 ['id' => $arr['contact-id']]);
2555                 }
2556                 // Now do the same for the system wide contacts with uid=0
2557                 if (!$arr['private']) {
2558                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2559                                 ['id' => $arr['owner-id']]);
2560
2561                         if ($arr['owner-id'] != $arr['author-id']) {
2562                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2563                                         ['id' => $arr['author-id']]);
2564                         }
2565                 }
2566         }
2567
2568         public static function setHashtags(&$item)
2569         {
2570                 $tags = BBCode::getTags($item["body"]);
2571
2572                 // No hashtags?
2573                 if (!count($tags)) {
2574                         return false;
2575                 }
2576
2577                 // What happens in [code], stays in [code]!
2578                 // escape the # and the [
2579                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2580                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2581                         function ($match) {
2582                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2583                                 $find = ['#', '['];
2584                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2585                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2586                         }, $item["body"]);
2587
2588                 // This sorting is important when there are hashtags that are part of other hashtags
2589                 // Otherwise there could be problems with hashtags like #test and #test2
2590                 rsort($tags);
2591
2592                 $URLSearchString = "^\[\]";
2593
2594                 // All hashtags should point to the home server if "local_tags" is activated
2595                 if (Config::get('system', 'local_tags')) {
2596                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2597                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2598
2599                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2600                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2601                 }
2602
2603                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2604                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2605                         function ($match) {
2606                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2607                         }, $item["body"]);
2608
2609                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2610                         function ($match) {
2611                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2612                         }, $item["body"]);
2613
2614                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2615                         function ($match) {
2616                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2617                         }, $item["body"]);
2618
2619                 // Repair recursive urls
2620                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2621                                 "&num;$2", $item["body"]);
2622
2623                 foreach ($tags as $tag) {
2624                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || $tag[1] == '#') {
2625                                 continue;
2626                         }
2627
2628                         $basetag = str_replace('_',' ',substr($tag,1));
2629                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2630
2631                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2632
2633                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2634                                 if (strlen($item["tag"])) {
2635                                         $item["tag"] = ',' . $item["tag"];
2636                                 }
2637                                 $item["tag"] = $newtag . $item["tag"];
2638                         }
2639                 }
2640
2641                 // Convert back the masked hashtags
2642                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2643
2644                 // Remember! What happens in [code], stays in [code]
2645                 // roleback the # and [
2646                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2647                         function ($match) {
2648                                 // we truly unESCape all sharp and leftsquarebracket
2649                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2650                                 $replace = ['#', '['];
2651                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2652                         }, $item["body"]);
2653         }
2654
2655         /**
2656          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2657          *
2658          * @param int $uid
2659          * @param int $item_id
2660          * @return boolean true if item was deleted, else false
2661          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2662          * @throws \ImagickException
2663          */
2664         private static function tagDeliver($uid, $item_id)
2665         {
2666                 $mention = false;
2667
2668                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2669                 if (!DBA::isResult($user)) {
2670                         return false;
2671                 }
2672
2673                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2674                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2675
2676                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2677                 if (!DBA::isResult($item)) {
2678                         return false;
2679                 }
2680
2681                 $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
2682
2683                 /*
2684                  * Diaspora uses their own hardwired link URL in @-tags
2685                  * instead of the one we supply with webfinger
2686                  */
2687                 $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['nickname']);
2688
2689                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2690                 if ($cnt) {
2691                         foreach ($matches as $mtch) {
2692                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2693                                         $mention = true;
2694                                         Logger::log('mention found: ' . $mtch[2]);
2695                                 }
2696                         }
2697                 }
2698
2699                 if (!$mention) {
2700                         if (($community_page || $prvgroup) &&
2701                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2702                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2703                                 // delete it!
2704                                 Logger::log("no-mention top-level post to community or private group. delete.");
2705                                 DBA::delete('item', ['id' => $item_id]);
2706                                 return true;
2707                         }
2708                         return false;
2709                 }
2710
2711                 $arr = ['item' => $item, 'user' => $user];
2712
2713                 Hook::callAll('tagged', $arr);
2714
2715                 if (!$community_page && !$prvgroup) {
2716                         return false;
2717                 }
2718
2719                 /*
2720                  * tgroup delivery - setup a second delivery chain
2721                  * prevent delivery looping - only proceed
2722                  * if the message originated elsewhere and is a top-level post
2723                  */
2724                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2725                         return false;
2726                 }
2727
2728                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2729                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2730                 if (!DBA::isResult($self)) {
2731                         return false;
2732                 }
2733
2734                 $owner_id = Contact::getIdForURL($self['url']);
2735
2736                 // also reset all the privacy bits to the forum default permissions
2737
2738                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2739
2740                 $psid = PermissionSet::fetchIDForPost($user);
2741
2742                 $forum_mode = ($prvgroup ? 2 : 1);
2743
2744                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2745                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2746                 self::update($fields, ['id' => $item_id]);
2747
2748                 self::updateThread($item_id);
2749
2750                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2751
2752                 return false;
2753         }
2754
2755         public static function isRemoteSelf($contact, &$datarray)
2756         {
2757                 $a = \get_app();
2758
2759                 if (!$contact['remote_self']) {
2760                         return false;
2761                 }
2762
2763                 // Prevent the forwarding of posts that are forwarded
2764                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2765                         Logger::log('Already forwarded', Logger::DEBUG);
2766                         return false;
2767                 }
2768
2769                 // Prevent to forward already forwarded posts
2770                 if ($datarray["app"] == $a->getHostName()) {
2771                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2772                         return false;
2773                 }
2774
2775                 // Only forward posts
2776                 if ($datarray["verb"] != Activity::POST) {
2777                         Logger::log('No post', Logger::DEBUG);
2778                         return false;
2779                 }
2780
2781                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2782                         Logger::log('Not public', Logger::DEBUG);
2783                         return false;
2784                 }
2785
2786                 $datarray2 = $datarray;
2787                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2788                 if ($contact['remote_self'] == 2) {
2789                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2790                                         ['uid' => $contact['uid'], 'self' => true]);
2791                         if (DBA::isResult($self)) {
2792                                 $datarray['contact-id'] = $self["id"];
2793
2794                                 $datarray['owner-name'] = $self["name"];
2795                                 $datarray['owner-link'] = $self["url"];
2796                                 $datarray['owner-avatar'] = $self["thumb"];
2797
2798                                 $datarray['author-name']   = $datarray['owner-name'];
2799                                 $datarray['author-link']   = $datarray['owner-link'];
2800                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2801
2802                                 unset($datarray['edited']);
2803
2804                                 unset($datarray['network']);
2805                                 unset($datarray['owner-id']);
2806                                 unset($datarray['author-id']);
2807                         }
2808
2809                         if ($contact['network'] != Protocol::FEED) {
2810                                 $datarray["guid"] = System::createUUID();
2811                                 unset($datarray["plink"]);
2812                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2813                                 $datarray["parent-uri"] = $datarray["uri"];
2814                                 $datarray["thr-parent"] = $datarray["uri"];
2815                                 $datarray["extid"] = Protocol::DFRN;
2816                                 $urlpart = parse_url($datarray2['author-link']);
2817                                 $datarray["app"] = $urlpart["host"];
2818                         } else {
2819                                 $datarray['private'] = 0;
2820                         }
2821                 }
2822
2823                 if ($contact['network'] != Protocol::FEED) {
2824                         // Store the original post
2825                         $result = self::insert($datarray2, false, false);
2826                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2827                 } else {
2828                         $datarray["app"] = "Feed";
2829                         $result = true;
2830                 }
2831
2832                 // Trigger automatic reactions for addons
2833                 $datarray['api_source'] = true;
2834
2835                 // We have to tell the hooks who we are - this really should be improved
2836                 $_SESSION["authenticated"] = true;
2837                 $_SESSION["uid"] = $contact['uid'];
2838
2839                 return $result;
2840         }
2841
2842         /**
2843          *
2844          * @param string $s
2845          * @param int    $uid
2846          * @param array  $item
2847          * @param int    $cid
2848          * @return string
2849          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2850          * @throws \ImagickException
2851          */
2852         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2853         {
2854                 if (Config::get('system', 'disable_embedded')) {
2855                         return $s;
2856                 }
2857
2858                 Logger::log('check for photos', Logger::DEBUG);
2859                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2860
2861                 $orig_body = $s;
2862                 $new_body = '';
2863
2864                 $img_start = strpos($orig_body, '[img');
2865                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2866                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2867
2868                 while (($img_st_close !== false) && ($img_len !== false)) {
2869                         $img_st_close++; // make it point to AFTER the closing bracket
2870                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2871
2872                         Logger::log('found photo ' . $image, Logger::DEBUG);
2873
2874                         if (stristr($image, $site . '/photo/')) {
2875                                 // Only embed locally hosted photos
2876                                 $replace = false;
2877                                 $i = basename($image);
2878                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2879                                 $x = strpos($i, '-');
2880
2881                                 if ($x) {
2882                                         $res = substr($i, $x + 1);
2883                                         $i = substr($i, 0, $x);
2884                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2885                                         if (DBA::isResult($photo)) {
2886                                                 /*
2887                                                  * Check to see if we should replace this photo link with an embedded image
2888                                                  * 1. No need to do so if the photo is public
2889                                                  * 2. If there's a contact-id provided, see if they're in the access list
2890                                                  *    for the photo. If so, embed it.
2891                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2892                                                  *    permissions, regardless of order but first check to see if they're an exact
2893                                                  *    match to save some processing overhead.
2894                                                  */
2895                                                 if (self::hasPermissions($photo)) {
2896                                                         if ($cid) {
2897                                                                 $recips = self::enumeratePermissions($photo);
2898                                                                 if (in_array($cid, $recips)) {
2899                                                                         $replace = true;
2900                                                                 }
2901                                                         } elseif ($item) {
2902                                                                 if (self::samePermissions($uid, $item, $photo)) {
2903                                                                         $replace = true;
2904                                                                 }
2905                                                         }
2906                                                 }
2907                                                 if ($replace) {
2908                                                         $photo_img = Photo::getImageForPhoto($photo);
2909                                                         // If a custom width and height were specified, apply before embedding
2910                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2911                                                                 Logger::log('scaling photo', Logger::DEBUG);
2912
2913                                                                 $width = intval($match[1]);
2914                                                                 $height = intval($match[2]);
2915
2916                                                                 $photo_img->scaleDown(max($width, $height));
2917                                                         }
2918
2919                                                         $data = $photo_img->asString();
2920                                                         $type = $photo_img->getType();
2921
2922                                                         Logger::log('replacing photo', Logger::DEBUG);
2923                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2924                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2925                                                 }
2926                                         }
2927                                 }
2928                         }
2929
2930                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2931                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2932                         if ($orig_body === false) {
2933                                 $orig_body = '';
2934                         }
2935
2936                         $img_start = strpos($orig_body, '[img');
2937                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2938                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2939                 }
2940
2941                 $new_body = $new_body . $orig_body;
2942
2943                 return $new_body;
2944         }
2945
2946         private static function hasPermissions($obj)
2947         {
2948                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2949                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2950         }
2951
2952         private static function samePermissions($uid, $obj1, $obj2)
2953         {
2954                 // first part is easy. Check that these are exactly the same.
2955                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2956                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2957                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2958                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2959                         return true;
2960                 }
2961
2962                 // This is harder. Parse all the permissions and compare the resulting set.
2963                 $recipients1 = self::enumeratePermissions($obj1);
2964                 $recipients2 = self::enumeratePermissions($obj2);
2965                 sort($recipients1);
2966                 sort($recipients2);
2967
2968                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2969                 return ($recipients1 == $recipients2);
2970         }
2971
2972         /**
2973          * Returns an array of contact-ids that are allowed to see this object
2974          *
2975          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2976          * @param bool  $check_dead Prunes unavailable contacts from the result
2977          * @return array
2978          * @throws \Exception
2979          */
2980         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2981         {
2982                 /** @var ACLFormatter $aclFormater */
2983                 $aclFormater = self::getClass(ACLFormatter::class);
2984
2985                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2986                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2987                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2988                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2989                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2990                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2991                 $recipients   = array_diff($recipients, $deny);
2992                 return $recipients;
2993         }
2994
2995         public static function getFeedTags($item)
2996         {
2997                 $ret = [];
2998                 $matches = false;
2999                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3000                 if ($cnt) {
3001                         for ($x = 0; $x < $cnt; $x ++) {
3002                                 if ($matches[1][$x]) {
3003                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
3004                                 }
3005                         }
3006                 }
3007                 $matches = false;
3008                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3009                 if ($cnt) {
3010                         for ($x = 0; $x < $cnt; $x ++) {
3011                                 if ($matches[1][$x]) {
3012                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3013                                 }
3014                         }
3015                 }
3016                 return $ret;
3017         }
3018
3019         public static function expire($uid, $days, $network = "", $force = false)
3020         {
3021                 if (!$uid || ($days < 1)) {
3022                         return;
3023                 }
3024
3025                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3026                         $uid, GRAVITY_PARENT];
3027
3028                 /*
3029                  * $expire_network_only = save your own wall posts
3030                  * and just expire conversations started by others
3031                  */
3032                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
3033
3034                 if ($expire_network_only) {
3035                         $condition[0] .= " AND NOT `wall`";
3036                 }
3037
3038                 if ($network != "") {
3039                         $condition[0] .= " AND `network` = ?";
3040                         $condition[] = $network;
3041                 }
3042
3043                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3044                 $condition[] = $days;
3045
3046                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3047
3048                 if (!DBA::isResult($items)) {
3049                         return;
3050                 }
3051
3052                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
3053
3054                 // Forcing expiring of items - but not notes and marked items
3055                 if ($force) {
3056                         $expire_items = true;
3057                 }
3058
3059                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
3060                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
3061                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
3062
3063                 $expired = 0;
3064
3065                 while ($item = Item::fetch($items)) {
3066                         // don't expire filed items
3067
3068                         if (strpos($item['file'], '[') !== false) {
3069                                 continue;
3070                         }
3071
3072                         // Only expire posts, not photos and photo comments
3073
3074                         if (!$expire_photos && strlen($item['resource-id'])) {
3075                                 continue;
3076                         } elseif (!$expire_starred && intval($item['starred'])) {
3077                                 continue;
3078                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3079                                 continue;
3080                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3081                                 continue;
3082                         }
3083
3084                         self::deleteById($item['id'], PRIORITY_LOW);
3085
3086                         ++$expired;
3087                 }
3088                 DBA::close($items);
3089                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3090         }
3091
3092         public static function firstPostDate($uid, $wall = false)
3093         {
3094                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3095                 $params = ['order' => ['received' => false]];
3096                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3097                 if (DBA::isResult($thread)) {
3098                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3099                 }
3100                 return false;
3101         }
3102
3103         /**
3104          * @brief add/remove activity to an item
3105          *
3106          * Toggle activities as like,dislike,attend of an item
3107          *
3108          * @param string $item_id
3109          * @param string $verb
3110          *            Activity verb. One of
3111          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3112          *            attendno, unattendno, attendmaybe, unattendmaybe
3113          * @return bool
3114          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3115          * @throws \ImagickException
3116          * @hook  'post_local_end'
3117          *            array $arr
3118          *            'post_id' => ID of posted item
3119          */
3120         public static function performLike($item_id, $verb)
3121         {
3122                 if (!Session::isAuthenticated()) {
3123                         return false;
3124                 }
3125
3126                 switch ($verb) {
3127                         case 'like':
3128                         case 'unlike':
3129                                 $activity = Activity::LIKE;
3130                                 break;
3131                         case 'dislike':
3132                         case 'undislike':
3133                                 $activity = Activity::DISLIKE;
3134                                 break;
3135                         case 'attendyes':
3136                         case 'unattendyes':
3137                                 $activity = Activity::ATTEND;
3138                                 break;
3139                         case 'attendno':
3140                         case 'unattendno':
3141                                 $activity = Activity::ATTENDNO;
3142                                 break;
3143                         case 'attendmaybe':
3144                         case 'unattendmaybe':
3145                                 $activity = Activity::ATTENDMAYBE;
3146                                 break;
3147                         default:
3148                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3149                                 return false;
3150                 }
3151
3152                 // Enable activity toggling instead of on/off
3153                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3154
3155                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3156
3157                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3158                 if (!DBA::isResult($item)) {
3159                         Logger::log('like: unknown item ' . $item_id);
3160                         return false;
3161                 }
3162
3163                 $item_uri = $item['uri'];
3164
3165                 $uid = $item['uid'];
3166                 if (($uid == 0) && local_user()) {
3167                         $uid = local_user();
3168                 }
3169
3170                 if (!Security::canWriteToUserWall($uid)) {
3171                         Logger::log('like: unable to write on wall ' . $uid);
3172                         return false;
3173                 }
3174
3175                 // Retrieves the local post owner
3176                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3177                 if (!DBA::isResult($owner_self_contact)) {
3178                         Logger::log('like: unknown owner ' . $uid);
3179                         return false;
3180                 }
3181
3182                 // Retrieve the current logged in user's public contact
3183                 $author_id = public_contact();
3184
3185                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3186                 if (!DBA::isResult($author_contact)) {
3187                         Logger::log('like: unknown author ' . $author_id);
3188                         return false;
3189                 }
3190
3191                 // Contact-id is the uid-dependant author contact
3192                 if (local_user() == $uid) {
3193                         $item_contact_id = $owner_self_contact['id'];
3194                 } else {
3195                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3196                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3197                         if (!DBA::isResult($item_contact)) {
3198                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3199                                 return false;
3200                         }
3201                 }
3202
3203                 // Look for an existing verb row
3204                 // event participation are essentially radio toggles. If you make a subsequent choice,
3205                 // we need to eradicate your first choice.
3206                 if ($event_verb_flag) {
3207                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3208
3209                         // Translate to the index based activity index
3210                         $activities = [];
3211                         foreach ($verbs as $verb) {
3212                                 $activities[] = self::activityToIndex($verb);
3213                         }
3214                 } else {
3215                         $activities = self::activityToIndex($activity);
3216                 }
3217
3218                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3219                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3220
3221                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3222
3223                 // If it exists, mark it as deleted
3224                 if (DBA::isResult($like_item)) {
3225                         self::deleteById($like_item['id']);
3226
3227                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3228                                 return true;
3229                         }
3230                 }
3231
3232                 // Verb is "un-something", just trying to delete existing entries
3233                 if (strpos($verb, 'un') === 0) {
3234                         return true;
3235                 }
3236
3237                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3238
3239                 $new_item = [
3240                         'guid'          => System::createUUID(),
3241                         'uri'           => self::newURI($item['uid']),
3242                         'uid'           => $item['uid'],
3243                         'contact-id'    => $item_contact_id,
3244                         'wall'          => $item['wall'],
3245                         'origin'        => 1,
3246                         'network'       => Protocol::DFRN,
3247                         'gravity'       => GRAVITY_ACTIVITY,
3248                         'parent'        => $item['id'],
3249                         'parent-uri'    => $item['uri'],
3250                         'thr-parent'    => $item['uri'],
3251                         'owner-id'      => $author_id,
3252                         'author-id'     => $author_id,
3253                         'body'          => $activity,
3254                         'verb'          => $activity,
3255                         'object-type'   => $objtype,
3256                         'allow_cid'     => $item['allow_cid'],
3257                         'allow_gid'     => $item['allow_gid'],
3258                         'deny_cid'      => $item['deny_cid'],
3259                         'deny_gid'      => $item['deny_gid'],
3260                         'visible'       => 1,
3261                         'unseen'        => 1,
3262                 ];
3263
3264                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3265                 if (!empty($signed)) {
3266                         $new_item['diaspora_signed_text'] = json_encode($signed);
3267                 }
3268
3269                 $new_item_id = self::insert($new_item);
3270
3271                 // If the parent item isn't visible then set it to visible
3272                 if (!$item['visible']) {
3273                         self::update(['visible' => true], ['id' => $item['id']]);
3274                 }
3275
3276                 $new_item['id'] = $new_item_id;
3277
3278                 Hook::callAll('post_local_end', $new_item);
3279
3280                 return true;
3281         }
3282
3283         private static function addThread($itemid, $onlyshadow = false)
3284         {
3285                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3286                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3287                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3288                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3289                 $item = self::selectFirst($fields, $condition);
3290
3291                 if (!DBA::isResult($item)) {
3292                         return;
3293                 }
3294
3295                 $item['iid'] = $itemid;
3296
3297                 if (!$onlyshadow) {
3298                         $result = DBA::insert('thread', $item);
3299
3300                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3301                 }
3302         }
3303
3304         private static function updateThread($itemid, $setmention = false)
3305         {
3306                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3307                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3308                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3309                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3310
3311                 $item = self::selectFirst($fields, $condition);
3312                 if (!DBA::isResult($item)) {
3313                         return;
3314                 }
3315
3316                 if ($setmention) {
3317                         $item["mention"] = 1;
3318                 }
3319
3320                 $fields = [];
3321
3322                 foreach ($item as $field => $data) {
3323                         if (!in_array($field, ["guid"])) {
3324                                 $fields[$field] = $data;
3325                         }
3326                 }
3327
3328                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3329
3330                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3331         }
3332
3333         private static function deleteThread($itemid, $itemuri = "")
3334         {
3335                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3336                 if (!DBA::isResult($item)) {
3337                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3338                         return;
3339                 }
3340
3341                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3342
3343                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3344
3345                 if ($itemuri != "") {
3346                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3347                         if (!self::exists($condition)) {
3348                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3349                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3350                         }
3351                 }
3352         }
3353
3354         public static function getPermissionsSQLByUserId($owner_id)
3355         {
3356                 $local_user = local_user();
3357                 $remote_user = Session::getRemoteContactID($owner_id);
3358
3359                 /*
3360                  * Construct permissions
3361                  *
3362                  * default permissions - anonymous user
3363                  */
3364                 $sql = " AND NOT `item`.`private`";
3365
3366                 // Profile owner - everything is visible
3367                 if ($local_user && ($local_user == $owner_id)) {
3368                         $sql = '';
3369                 } elseif ($remote_user) {
3370                         /*
3371                          * Authenticated visitor. Unless pre-verified,
3372                          * check that the contact belongs to this $owner_id
3373                          * and load the groups the visitor belongs to.
3374                          * If pre-verified, the caller is expected to have already
3375                          * done this and passed the groups into this function.
3376                          */
3377                         $set = PermissionSet::get($owner_id, $remote_user);
3378
3379                         if (!empty($set)) {
3380                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3381                         } else {
3382                                 $sql_set = '';
3383                         }
3384
3385                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3386                 }
3387
3388                 return $sql;
3389         }
3390
3391         /**
3392          * get translated item type
3393          *
3394          * @param $item
3395          * @return string
3396          */
3397         public static function postType($item)
3398         {
3399                 if (!empty($item['event-id'])) {
3400                         return L10n::t('event');
3401                 } elseif (!empty($item['resource-id'])) {
3402                         return L10n::t('photo');
3403                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3404                         return L10n::t('activity');
3405                 } elseif ($item['id'] != $item['parent']) {
3406                         return L10n::t('comment');
3407                 }
3408
3409                 return L10n::t('post');
3410         }
3411
3412         /**
3413          * Sets the "rendered-html" field of the provided item
3414          *
3415          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3416          *
3417          * @param array $item
3418          * @param bool  $update
3419          *
3420          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3421          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3422          */
3423         public static function putInCache(&$item, $update = false)
3424         {
3425                 $body = $item["body"];
3426
3427                 $rendered_hash = $item['rendered-hash'] ?? '';
3428                 $rendered_html = $item['rendered-html'] ?? '';
3429
3430                 if ($rendered_hash == ''
3431                         || $rendered_html == ""
3432                         || $rendered_hash != hash("md5", $item["body"])
3433                         || Config::get("system", "ignore_cache")
3434                 ) {
3435                         self::addRedirToImageTags($item);
3436
3437                         $item["rendered-html"] = BBCode::convert($item["body"]);
3438                         $item["rendered-hash"] = hash("md5", $item["body"]);
3439
3440                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3441                         Hook::callAll('put_item_in_cache', $hook_data);
3442                         $item['rendered-html'] = $hook_data['rendered-html'];
3443                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3444                         unset($hook_data);
3445
3446                         // Force an update if the generated values differ from the existing ones
3447                         if ($rendered_hash != $item["rendered-hash"]) {
3448                                 $update = true;
3449                         }
3450
3451                         // Only compare the HTML when we forcefully ignore the cache
3452                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3453                                 $update = true;
3454                         }
3455
3456                         if ($update && !empty($item["id"])) {
3457                                 self::update(
3458                                         [
3459                                                 'rendered-html' => $item["rendered-html"],
3460                                                 'rendered-hash' => $item["rendered-hash"]
3461                                         ],
3462                                         ['id' => $item["id"]]
3463                                 );
3464                         }
3465                 }
3466
3467                 $item["body"] = $body;
3468         }
3469
3470         /**
3471          * @brief Find any non-embedded images in private items and add redir links to them
3472          *
3473          * @param array &$item The field array of an item row
3474          */
3475         private static function addRedirToImageTags(array &$item)
3476         {
3477                 $app = self::getApp();
3478
3479                 $matches = [];
3480                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3481                 if ($cnt) {
3482                         foreach ($matches as $mtch) {
3483                                 if (strpos($mtch[1], '/redir') !== false) {
3484                                         continue;
3485                                 }
3486
3487                                 if ((local_user() == $item['uid']) && ($item['private'] == 1) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3488                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3489                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3490                                 }
3491                         }
3492                 }
3493         }
3494
3495         /**
3496          * @brief Given an item array, convert the body element from bbcode to html and add smilie icons.
3497          * If attach is true, also add icons for item attachments.
3498          *
3499          * @param array   $item
3500          * @param boolean $attach
3501          * @param boolean $is_preview
3502          * @return string item body html
3503          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3504          * @throws \ImagickException
3505          * @hook  prepare_body_init item array before any work
3506          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3507          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3508          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3509          */
3510         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3511         {
3512                 $a = self::getApp();
3513                 Hook::callAll('prepare_body_init', $item);
3514
3515                 // In order to provide theme developers more possibilities, event items
3516                 // are treated differently.
3517                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3518                         $ev = Event::getItemHTML($item);
3519                         return $ev;
3520                 }
3521
3522                 $tags = Term::populateTagsFromItem($item);
3523
3524                 $item['tags'] = $tags['tags'];
3525                 $item['hashtags'] = $tags['hashtags'];
3526                 $item['mentions'] = $tags['mentions'];
3527
3528                 // Compile eventual content filter reasons
3529                 $filter_reasons = [];
3530                 if (!$is_preview && public_contact() != $item['author-id']) {
3531                         if (!empty($item['content-warning']) && (!local_user() || !PConfig::get(local_user(), 'system', 'disable_cw', false))) {
3532                                 $filter_reasons[] = L10n::t('Content warning: %s', $item['content-warning']);
3533                         }
3534
3535                         $hook_data = [
3536                                 'item' => $item,
3537                                 'filter_reasons' => $filter_reasons
3538                         ];
3539                         Hook::callAll('prepare_body_content_filter', $hook_data);
3540                         $filter_reasons = $hook_data['filter_reasons'];
3541                         unset($hook_data);
3542                 }
3543
3544                 // Update the cached values if there is no "zrl=..." on the links.
3545                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3546
3547                 // Or update it if the current viewer is the intented viewer.
3548                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3549                         $update = true;
3550                 }
3551
3552                 self::putInCache($item, $update);
3553                 $s = $item["rendered-html"];
3554
3555                 $hook_data = [
3556                         'item' => $item,
3557                         'html' => $s,
3558                         'preview' => $is_preview,
3559                         'filter_reasons' => $filter_reasons
3560                 ];
3561                 Hook::callAll('prepare_body', $hook_data);
3562                 $s = $hook_data['html'];
3563                 unset($hook_data);
3564
3565                 if (!$attach) {
3566                         // Replace the blockquotes with quotes that are used in mails.
3567                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3568                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3569                         return $s;
3570                 }
3571
3572                 $as = '';
3573                 $vhead = false;
3574                 $matches = [];
3575                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3576                 foreach ($matches as $mtch) {
3577                         $mime = $mtch[3];
3578
3579                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3580
3581                         if (strpos($mime, 'video') !== false) {
3582                                 if (!$vhead) {
3583                                         $vhead = true;
3584                                         $a->page['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3585                                 }
3586
3587                                 $url_parts = explode('/', $the_url);
3588                                 $id = end($url_parts);
3589                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3590                                         '$video' => [
3591                                                 'id'     => $id,
3592                                                 'title'  => L10n::t('View Video'),
3593                                                 'src'    => $the_url,
3594                                                 'mime'   => $mime,
3595                                         ],
3596                                 ]);
3597                         }
3598
3599                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3600                         if ($filetype) {
3601                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3602                                 $filesubtype = str_replace('.', '-', $filesubtype);
3603                         } else {
3604                                 $filetype = 'unkn';
3605                                 $filesubtype = 'unkn';
3606                         }
3607
3608                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3609                         $title .= ' ' . $mtch[2] . ' ' . L10n::t('bytes');
3610
3611                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3612                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3613                 }
3614
3615                 if ($as != '') {
3616                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3617                 }
3618
3619                 // Map.
3620                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3621                         $x = Map::byCoordinates(trim($item['coord']));
3622                         if ($x) {
3623                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3624                         }
3625                 }
3626
3627                 // Replace friendica image url size with theme preference.
3628                 if (!empty($a->theme_info['item_image_size'])) {
3629                         $ps = $a->theme_info['item_image_size'];
3630                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3631                 }
3632
3633                 $s = HTML::applyContentFilter($s, $filter_reasons);
3634
3635                 $hook_data = ['item' => $item, 'html' => $s];
3636                 Hook::callAll('prepare_body_final', $hook_data);
3637
3638                 return $hook_data['html'];
3639         }
3640
3641         /**
3642          * get private link for item
3643          *
3644          * @param array $item
3645          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3646          * @throws \Exception
3647          */
3648         public static function getPlink($item)
3649         {
3650                 $a = self::getApp();
3651
3652                 if ($a->user['nickname'] != "") {
3653                         $ret = [
3654                                 'href' => "display/" . $item['guid'],
3655                                 'orig' => "display/" . $item['guid'],
3656                                 'title' => L10n::t('View on separate page'),
3657                                 'orig_title' => L10n::t('view on separate page'),
3658                         ];
3659
3660                         if (!empty($item['plink'])) {
3661                                 $ret["href"] = $a->removeBaseURL($item['plink']);
3662                                 $ret["title"] = L10n::t('link to source');
3663                         }
3664
3665                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3666                         $ret = [
3667                                 'href' => $item['plink'],
3668                                 'orig' => $item['plink'],
3669                                 'title' => L10n::t('link to source'),
3670                         ];
3671                 } else {
3672                         $ret = [];
3673                 }
3674
3675                 return $ret;
3676         }
3677
3678         /**
3679          * Is the given item array a post that is sent as starting post to a forum?
3680          *
3681          * @param array $item
3682          * @param array $owner
3683          *
3684          * @return boolean "true" when it is a forum post
3685          */
3686         public static function isForumPost(array $item, array $owner = [])
3687         {
3688                 if (empty($owner)) {
3689                         $owner = User::getOwnerDataById($item['uid']);
3690                         if (empty($owner)) {
3691                                 return false;
3692                         }
3693                 }
3694
3695                 if (($item['author-id'] == $item['owner-id']) ||
3696                         ($owner['id'] == $item['contact-id']) ||
3697                         ($item['uri'] != $item['parent-uri']) ||
3698                         $item['origin']) {
3699                         return false;
3700                 }
3701
3702                 return Contact::isForum($item['contact-id']);
3703         }
3704
3705         /**
3706          * Search item id for given URI or plink
3707          *
3708          * @param string $uri
3709          * @param integer $uid
3710          *
3711          * @return integer item id
3712          */
3713         public static function searchByLink($uri, $uid = 0)
3714         {
3715                 $ssl_uri = str_replace('http://', 'https://', $uri);
3716                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3717
3718                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3719                 if (DBA::isResult($item)) {
3720                         return $item['id'];
3721                 }
3722
3723                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3724                 if (!DBA::isResult($itemcontent)) {
3725                         return 0;
3726                 }
3727
3728                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3729                 if (!DBA::isResult($itemuri)) {
3730                         return 0;
3731                 }
3732
3733                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3734                 if (DBA::isResult($item)) {
3735                         return $item['id'];
3736                 }
3737
3738                 return 0;
3739         }
3740
3741         /**
3742          * Fetches item for given URI or plink
3743          *
3744          * @param string $uri
3745          * @param integer $uid
3746          *
3747          * @return integer item id
3748          */
3749         public static function fetchByLink($uri, $uid = 0)
3750         {
3751                 $item_id = self::searchByLink($uri, $uid);
3752                 if (!empty($item_id)) {
3753                         return $item_id;
3754                 }
3755
3756                 if (ActivityPub\Processor::fetchMissingActivity($uri)) {
3757                         $item_id = self::searchByLink($uri, $uid);
3758                 } else {
3759                         $item_id = Diaspora::fetchByURL($uri);
3760                 }
3761
3762                 if (!empty($item_id)) {
3763                         return $item_id;
3764                 }
3765
3766                 return 0;
3767         }
3768
3769         /**
3770          * Return share data from an item array (if the item is shared item)
3771          * We are providing the complete Item array, because at some time in the future
3772          * we hopefully will define these values not in the body anymore but in some item fields.
3773          * This function is meant to replace all similar functions in the system.
3774          *
3775          * @param array $item
3776          *
3777          * @return array with share information
3778          */
3779         public static function getShareArray($item)
3780         {
3781                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3782                         return [];
3783                 }
3784
3785                 $attribute_string = $matches[2];
3786                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3787                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3788                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3789                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3790                         }
3791                 }
3792                 return $attributes;
3793         }
3794
3795         /**
3796          * Fetch item information for shared items from the original items and adds it.
3797          *
3798          * @param array $item
3799          *
3800          * @return array item array with data from the original item
3801          */
3802         public static function addShareDataFromOriginal($item)
3803         {
3804                 $shared = self::getShareArray($item);
3805                 if (empty($shared)) {
3806                         return $item;
3807                 }
3808
3809                 // Real reshares always have got a GUID.
3810                 if (empty($shared['guid'])) {
3811                         return $item;
3812                 }
3813
3814                 $uid = $item['uid'] ?? 0;
3815
3816                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3817                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3818                 if (!DBA::isResult($shared_item)) {
3819                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3820                         $id = self::fetchByLink($shared['link'], $uid);
3821                         if (empty($id)) {
3822                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3823                                 return $item;
3824                         }
3825
3826                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3827                         if (!DBA::isResult($shared_item)) {
3828                                 return $item;
3829                         }
3830                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3831                 } else {
3832                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3833                 }
3834
3835                 if (!empty($shared_item['title'])) {
3836                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3837                         unset($shared_item['title']);
3838                 } else {
3839                         $body = $shared_item['body'];
3840                 }
3841
3842                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3843                 unset($shared_item['body']);
3844
3845                 return array_merge($item, $shared_item);
3846         }
3847 }