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\DI;
  25 use Friendica\Protocol\Activity;
  26 use Friendica\Protocol\ActivityPub;
  27 use Friendica\Protocol\Diaspora;
  28 use Friendica\Protocol\OStatus;
  29 use Friendica\Util\ACLFormatter;
  30 use Friendica\Util\DateTimeFormat;
  31 use Friendica\Util\Map;
  32 use Friendica\Util\Network;
  33 use Friendica\Util\Security;
  34 use Friendica\Util\Strings;
  35 use Friendica\Util\XML;
  36 use Friendica\Worker\Delivery;
  37 use Text_LanguageDetect;
  38
  39 class Item extends BaseObject
  40 {
  41         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  42         const PT_ARTICLE = 0;
  43         const PT_NOTE = 1;
  44         const PT_PAGE = 2;
  45         const PT_IMAGE = 16;
  46         const PT_AUDIO = 17;
  47         const PT_VIDEO = 18;
  48         const PT_DOCUMENT = 19;
  49         const PT_EVENT = 32;
  50         const PT_PERSONAL_NOTE = 128;
  51
  52         // Field list that is used to display the items
  53         const DISPLAY_FIELDLIST = [
  54                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  55                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  56                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  57                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  58                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  59                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  60                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  61                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  62                 'writable', 'self', 'cid', 'alias', 'pinned',
  63                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  64                 'event-summary', 'event-desc', 'event-location', 'event-type',
  65                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  66                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  67         ];
  68
  69         // Field list that is used to deliver items via the protocols
  70         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  71                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  72                         'private', 'title', 'body', 'location', 'coord', 'app',
  73                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  74                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  75                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  76                         'signed_text', 'signature', 'signer', 'network'];
  77
  78         // Field list for "item-content" table that is mixed with the item table
  79         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  80                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  81                         'object-type', 'object', 'target-type', 'target', 'plink'];
  82
  83         // Field list for "item-content" table that is not present in the "item" table
  84         const CONTENT_FIELDLIST = ['language'];
  85
  86         // All fields in the item table
  87         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  88                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  89                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  90                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  91                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
  92                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  93                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  94                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  95                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  96                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  97                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  98
  99         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 100         // The item-activity table only stores the index and needs this array to know the matching activity.
 101         const ACTIVITIES = [
 102                 Activity::LIKE, Activity::DISLIKE,
 103                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 104                 Activity::FOLLOW,
 105                 Activity::ANNOUNCE];
 106
 107         private static $legacy_mode = null;
 108
 109         public static function isLegacyMode()
 110         {
 111                 if (is_null(self::$legacy_mode)) {
 112                         self::$legacy_mode = (Config::get("system", "post_update_version") < 1279);
 113                 }
 114
 115                 return self::$legacy_mode;
 116         }
 117
 118         /**
 119          * Set the pinned state of an item
 120          *
 121          * @param integer $iid    Item ID
 122          * @param integer $uid    User ID
 123          * @param boolean $pinned Pinned state
 124          */
 125         public static function setPinned(int $iid, int $uid, bool $pinned)
 126         {
 127                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 128         }
 129
 130         /**
 131          * Get the pinned state
 132          *
 133          * @param integer $iid Item ID
 134          * @param integer $uid User ID
 135          *
 136          * @return boolean pinned state
 137          */
 138         public static function getPinned(int $iid, int $uid)
 139         {
 140                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 141                 if (!DBA::isResult($useritem)) {
 142                         return false;
 143                 }
 144                 return (bool)$useritem['pinned'];
 145         }
 146
 147         /**
 148          * @brief Select pinned rows from the item table for a given user
 149          *
 150          * @param integer $uid       User ID
 151          * @param array   $selected  Array of selected fields, empty for all
 152          * @param array   $condition Array of fields for condition
 153          * @param array   $params    Array of several parameters
 154          *
 155          * @return boolean|object
 156          * @throws \Exception
 157          */
 158         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 159         {
 160                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 161                 if (!DBA::isResult($useritems)) {
 162                         return $useritems;
 163                 }
 164
 165                 $pinned = [];
 166                 while ($useritem = self::fetch($useritems)) {
 167                         $pinned[] = $useritem['iid'];
 168                 }
 169                 DBA::close($useritems);
 170
 171                 if (empty($pinned)) {
 172                         return [];
 173                 }
 174
 175                 if (empty($condition) || !is_array($condition)) {
 176                         $condition = ['iid' => $pinned];
 177                 } else {
 178                         reset($condition);
 179                         $first_key = key($condition);
 180                         if (!is_int($first_key)) {
 181                                 $condition['iid'] = $pinned;
 182                         } else {
 183                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 184                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 185                                 $condition = array_merge($condition, $pinned);
 186                         }
 187                 }
 188
 189                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 190         }
 191
 192         /**
 193          * @brief returns an activity index from an activity string
 194          *
 195          * @param string $activity activity string
 196          * @return integer Activity index
 197          */
 198         public static function activityToIndex($activity)
 199         {
 200                 $index = array_search($activity, self::ACTIVITIES);
 201
 202                 if (is_bool($index)) {
 203                         $index = -1;
 204                 }
 205
 206                 return $index;
 207         }
 208
 209         /**
 210          * @brief returns an activity string from an activity index
 211          *
 212          * @param integer $index activity index
 213          * @return string Activity string
 214          */
 215         private static function indexToActivity($index)
 216         {
 217                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 218                         return '';
 219                 }
 220
 221                 return self::ACTIVITIES[$index];
 222         }
 223
 224         /**
 225          * @brief Fetch a single item row
 226          *
 227          * @param mixed $stmt statement object
 228          * @return array current row
 229          */
 230         public static function fetch($stmt)
 231         {
 232                 $row = DBA::fetch($stmt);
 233
 234                 if (is_bool($row)) {
 235                         return $row;
 236                 }
 237
 238                 // ---------------------- Transform item structure data ----------------------
 239
 240                 // We prefer the data from the user's contact over the public one
 241                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 242                         ($row['author-link'] == $row['contact-link'])) {
 243                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 244                                 $row['author-avatar'] = $row['contact-avatar'];
 245                         }
 246                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 247                                 $row['author-name'] = $row['contact-name'];
 248                         }
 249                 }
 250
 251                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 252                         ($row['owner-link'] == $row['contact-link'])) {
 253                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 254                                 $row['owner-avatar'] = $row['contact-avatar'];
 255                         }
 256                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 257                                 $row['owner-name'] = $row['contact-name'];
 258                         }
 259                 }
 260
 261                 // We can always comment on posts from these networks
 262                 if (array_key_exists('writable', $row) &&
 263                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 264                         $row['writable'] = true;
 265                 }
 266
 267                 // ---------------------- Transform item content data ----------------------
 268
 269                 // Fetch data from the item-content table whenever there is content there
 270                 if (self::isLegacyMode()) {
 271                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 272                         foreach ($legacy_fields as $field) {
 273                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 274                                         $row[$field] = $row['internal-item-' . $field];
 275                                 }
 276                                 unset($row['internal-item-' . $field]);
 277                         }
 278                 }
 279
 280                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 281                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 282                         if (array_key_exists('title', $row)) {
 283                                 $row['title'] = '';
 284                         }
 285                         if (array_key_exists('body', $row)) {
 286                                 $row['body'] = $row['verb'];
 287                         }
 288                         if (array_key_exists('object', $row)) {
 289                                 $row['object'] = '';
 290                         }
 291                         if (array_key_exists('object-type', $row)) {
 292                                 $row['object-type'] = Activity\ObjectType::NOTE;
 293                         }
 294                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 295                         // Posts don't have a target - but having tags or files.
 296                         // We safe some performance by building tag and file strings only here.
 297                         // We remove the target since they aren't used for this type.
 298                         // In mail posts we do store some mail header data in the object.
 299                         if (array_key_exists('target', $row)) {
 300                                 $row['target'] = '';
 301                         }
 302                 }
 303
 304                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 305                         // Build the tag string out of the term entries
 306                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 307                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 308                         }
 309
 310                         // Build the file string out of the term entries
 311                         if (array_key_exists('file', $row) && empty($row['file'])) {
 312                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 313                         }
 314                 }
 315
 316                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 317                         $row['signed_text'] = $row['interaction'];
 318                 }
 319
 320                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 321                         $row['ignored'] = $row['internal-user-ignored'];
 322                 }
 323
 324                 // Remove internal fields
 325                 unset($row['internal-activity']);
 326                 unset($row['internal-network']);
 327                 unset($row['internal-iid']);
 328                 unset($row['internal-iaid']);
 329                 unset($row['internal-icid']);
 330                 unset($row['internal-user-ignored']);
 331                 unset($row['interaction']);
 332
 333                 return $row;
 334         }
 335
 336         /**
 337          * @brief Fills an array with data from an item query
 338          *
 339          * @param object $stmt statement object
 340          * @param bool   $do_close
 341          * @return array Data array
 342          */
 343         public static function inArray($stmt, $do_close = true) {
 344                 if (is_bool($stmt)) {
 345                         return $stmt;
 346                 }
 347
 348                 $data = [];
 349                 while ($row = self::fetch($stmt)) {
 350                         $data[] = $row;
 351                 }
 352                 if ($do_close) {
 353                         DBA::close($stmt);
 354                 }
 355                 return $data;
 356         }
 357
 358         /**
 359          * @brief Check if item data exists
 360          *
 361          * @param array $condition array of fields for condition
 362          *
 363          * @return boolean Are there rows for that condition?
 364          * @throws \Exception
 365          */
 366         public static function exists($condition) {
 367                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 368
 369                 if (is_bool($stmt)) {
 370                         $retval = $stmt;
 371                 } else {
 372                         $retval = (DBA::numRows($stmt) > 0);
 373                 }
 374
 375                 DBA::close($stmt);
 376
 377                 return $retval;
 378         }
 379
 380         /**
 381          * Retrieve a single record from the item table for a given user and returns it in an associative array
 382          *
 383          * @brief Retrieve a single record from a table
 384          * @param integer $uid User ID
 385          * @param array   $selected
 386          * @param array   $condition
 387          * @param array   $params
 388          * @return bool|array
 389          * @throws \Exception
 390          * @see   DBA::select
 391          */
 392         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 393         {
 394                 $params['uid'] = $uid;
 395
 396                 if (empty($selected)) {
 397                         $selected = Item::DISPLAY_FIELDLIST;
 398                 }
 399
 400                 return self::selectFirst($selected, $condition, $params);
 401         }
 402
 403         /**
 404          * @brief Select rows from the item table for a given user
 405          *
 406          * @param integer $uid       User ID
 407          * @param array   $selected  Array of selected fields, empty for all
 408          * @param array   $condition Array of fields for condition
 409          * @param array   $params    Array of several parameters
 410          *
 411          * @return boolean|object
 412          * @throws \Exception
 413          */
 414         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 415         {
 416                 $params['uid'] = $uid;
 417
 418                 if (empty($selected)) {
 419                         $selected = Item::DISPLAY_FIELDLIST;
 420                 }
 421
 422                 return self::select($selected, $condition, $params);
 423         }
 424
 425         /**
 426          * Retrieve a single record from the item table and returns it in an associative array
 427          *
 428          * @brief Retrieve a single record from a table
 429          * @param array $fields
 430          * @param array $condition
 431          * @param array $params
 432          * @return bool|array
 433          * @throws \Exception
 434          * @see   DBA::select
 435          */
 436         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 437         {
 438                 $params['limit'] = 1;
 439
 440                 $result = self::select($fields, $condition, $params);
 441
 442                 if (is_bool($result)) {
 443                         return $result;
 444                 } else {
 445                         $row = self::fetch($result);
 446                         DBA::close($result);
 447                         return $row;
 448                 }
 449         }
 450
 451         /**
 452          * @brief Select rows from the item table and returns them as an array
 453          *
 454          * @param array $selected  Array of selected fields, empty for all
 455          * @param array $condition Array of fields for condition
 456          * @param array $params    Array of several parameters
 457          *
 458          * @return array
 459          * @throws \Exception
 460          */
 461         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 462         {
 463                 $result = self::select($fields, $condition, $params);
 464
 465                 if (is_bool($result)) {
 466                         return [];
 467                 }
 468
 469                 $data = [];
 470                 while ($row = self::fetch($result)) {
 471                         $data[] = $row;
 472                 }
 473                 DBA::close($result);
 474
 475                 return $data;
 476         }
 477
 478         /**
 479          * @brief Select rows from the item table
 480          *
 481          * @param array $selected  Array of selected fields, empty for all
 482          * @param array $condition Array of fields for condition
 483          * @param array $params    Array of several parameters
 484          *
 485          * @return boolean|object
 486          * @throws \Exception
 487          */
 488         public static function select(array $selected = [], array $condition = [], $params = [])
 489         {
 490                 $uid = 0;
 491                 $usermode = false;
 492
 493                 if (isset($params['uid'])) {
 494                         $uid = $params['uid'];
 495                         $usermode = true;
 496                 }
 497
 498                 $fields = self::fieldlist($usermode);
 499
 500                 $select_fields = self::constructSelectFields($fields, $selected);
 501
 502                 $condition_string = DBA::buildCondition($condition);
 503
 504                 $condition_string = self::addTablesToFields($condition_string, $fields);
 505
 506                 if ($usermode) {
 507                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 508                 }
 509
 510                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 511
 512                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 513
 514                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 515
 516                 return DBA::p($sql, $condition);
 517         }
 518
 519         /**
 520          * @brief Select rows from the starting post in the item table
 521          *
 522          * @param integer $uid       User ID
 523          * @param array   $selected
 524          * @param array   $condition Array of fields for condition
 525          * @param array   $params    Array of several parameters
 526          *
 527          * @return boolean|object
 528          * @throws \Exception
 529          */
 530         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 531         {
 532                 $params['uid'] = $uid;
 533
 534                 if (empty($selected)) {
 535                         $selected = Item::DISPLAY_FIELDLIST;
 536                 }
 537
 538                 return self::selectThread($selected, $condition, $params);
 539         }
 540
 541         /**
 542          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 543          *
 544          * @brief Retrieve a single record from a table
 545          * @param integer $uid User ID
 546          * @param array   $selected
 547          * @param array   $condition
 548          * @param array   $params
 549          * @return bool|array
 550          * @throws \Exception
 551          * @see   DBA::select
 552          */
 553         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 554         {
 555                 $params['uid'] = $uid;
 556
 557                 if (empty($selected)) {
 558                         $selected = Item::DISPLAY_FIELDLIST;
 559                 }
 560
 561                 return self::selectFirstThread($selected, $condition, $params);
 562         }
 563
 564         /**
 565          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 566          *
 567          * @brief Retrieve a single record from a table
 568          * @param array $fields
 569          * @param array $condition
 570          * @param array $params
 571          * @return bool|array
 572          * @throws \Exception
 573          * @see   DBA::select
 574          */
 575         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 576         {
 577                 $params['limit'] = 1;
 578                 $result = self::selectThread($fields, $condition, $params);
 579
 580                 if (is_bool($result)) {
 581                         return $result;
 582                 } else {
 583                         $row = self::fetch($result);
 584                         DBA::close($result);
 585                         return $row;
 586                 }
 587         }
 588
 589         /**
 590          * @brief Select rows from the starting post in the item table
 591          *
 592          * @param array $selected  Array of selected fields, empty for all
 593          * @param array $condition Array of fields for condition
 594          * @param array $params    Array of several parameters
 595          *
 596          * @return boolean|object
 597          * @throws \Exception
 598          */
 599         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 600         {
 601                 $uid = 0;
 602                 $usermode = false;
 603
 604                 if (isset($params['uid'])) {
 605                         $uid = $params['uid'];
 606                         $usermode = true;
 607                 }
 608
 609                 $fields = self::fieldlist($usermode);
 610
 611                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 612
 613                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 614                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 615                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 616                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 617
 618                 $select_fields = self::constructSelectFields($fields, $selected);
 619
 620                 $condition_string = DBA::buildCondition($condition);
 621
 622                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 623                 $condition_string = self::addTablesToFields($condition_string, $fields);
 624
 625                 if ($usermode) {
 626                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 627                 }
 628
 629                 $param_string = DBA::buildParameter($params);
 630                 $param_string = self::addTablesToFields($param_string, $threadfields);
 631                 $param_string = self::addTablesToFields($param_string, $fields);
 632
 633                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 634
 635                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 636
 637                 return DBA::p($sql, $condition);
 638         }
 639
 640         /**
 641          * @brief Returns a list of fields that are associated with the item table
 642          *
 643          * @param $usermode
 644          * @return array field list
 645          */
 646         private static function fieldlist($usermode)
 647         {
 648                 $fields = [];
 649
 650                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 651                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 652                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 653                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 654                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 655                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 656                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 657                         'network' => 'internal-network', 'icid' => 'internal-icid',
 658                         'iaid' => 'internal-iaid'];
 659
 660                 if ($usermode) {
 661                         $fields['user-item'] = ['pinned', 'ignored' => 'internal-user-ignored'];
 662                 }
 663
 664                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 665
 666                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 667
 668                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 669
 670                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 671
 672                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 673                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 674
 675                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 676                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 677
 678                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 679                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 680                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 681
 682                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 683
 684                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 685
 686                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 687                         'start' => 'event-start','finish' => 'event-finish',
 688                         'summary' => 'event-summary','desc' => 'event-desc',
 689                         'location' => 'event-location', 'type' => 'event-type',
 690                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 691                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 692
 693                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 694
 695                 $fields['diaspora-interaction'] = ['interaction'];
 696
 697                 return $fields;
 698         }
 699
 700         /**
 701          * @brief Returns SQL condition for the "select" functions
 702          *
 703          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 704          *
 705          * @return string SQL condition
 706          */
 707         private static function condition($thread_mode)
 708         {
 709                 if ($thread_mode) {
 710                         $master_table = "`thread`";
 711                 } else {
 712                         $master_table = "`item`";
 713                 }
 714                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 715                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 716                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 717                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 718                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 719                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 720                         GRAVITY_PARENT, GRAVITY_PARENT);
 721         }
 722
 723         /**
 724          * @brief Returns all needed "JOIN" commands for the "select" functions
 725          *
 726          * @param integer $uid          User ID
 727          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 728          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 729          *
 730          * @param         $user_mode
 731          * @return string The SQL joins for the "select" functions
 732          */
 733         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 734         {
 735                 if ($thread_mode) {
 736                         $master_table = "`thread`";
 737                         $master_table_key = "`thread`.`iid`";
 738                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 739                 } else {
 740                         $master_table = "`item`";
 741                         $master_table_key = "`item`.`id`";
 742                         $joins = '';
 743                 }
 744
 745                 if ($user_mode) {
 746                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 747                                 AND NOT `contact`.`blocked`
 748                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 749                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 750                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 751                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 752                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 753                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 754                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 755                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 756                 } else {
 757                         if (strpos($sql_commands, "`contact`.") !== false) {
 758                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 759                         }
 760                         if (strpos($sql_commands, "`author`.") !== false) {
 761                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 762                         }
 763                         if (strpos($sql_commands, "`owner`.") !== false) {
 764                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 765                         }
 766                 }
 767
 768                 if (strpos($sql_commands, "`group_member`.") !== false) {
 769                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 770                 }
 771
 772                 if (strpos($sql_commands, "`user`.") !== false) {
 773                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 774                 }
 775
 776                 if (strpos($sql_commands, "`event`.") !== false) {
 777                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 778                 }
 779
 780                 if (strpos($sql_commands, "`sign`.") !== false) {
 781                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 782                 }
 783
 784                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 785                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 786                 }
 787
 788                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 789                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 790                 }
 791
 792                 if (strpos($sql_commands, "`item-content`.") !== false) {
 793                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 794                 }
 795
 796                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 797                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 798                 }
 799
 800                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 801                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 802                 }
 803
 804                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 805                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 806                 }
 807
 808                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 809                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 810                 }
 811
 812                 return $joins;
 813         }
 814
 815         /**
 816          * @brief Add the field list for the "select" functions
 817          *
 818          * @param array $fields The field definition array
 819          * @param array $selected The array with the selected fields from the "select" functions
 820          *
 821          * @return string The field list
 822          */
 823         private static function constructSelectFields($fields, $selected)
 824         {
 825                 if (!empty($selected)) {
 826                         $selected[] = 'internal-iid';
 827                         $selected[] = 'internal-iaid';
 828                         $selected[] = 'internal-icid';
 829                         $selected[] = 'internal-network';
 830                 }
 831
 832                 if (in_array('verb', $selected)) {
 833                         $selected[] = 'internal-activity';
 834                 }
 835
 836                 if (in_array('ignored', $selected)) {
 837                         $selected[] = 'internal-user-ignored';
 838                 }
 839
 840                 if (in_array('signed_text', $selected)) {
 841                         $selected[] = 'interaction';
 842                 }
 843
 844                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 845
 846                 $selection = [];
 847                 foreach ($fields as $table => $table_fields) {
 848                         foreach ($table_fields as $field => $select) {
 849                                 if (empty($selected) || in_array($select, $selected)) {
 850                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 851                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 852                                         }
 853                                         if (is_int($field)) {
 854                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 855                                         } else {
 856                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 857                                         }
 858                                 }
 859                         }
 860                 }
 861                 return implode(", ", $selection);
 862         }
 863
 864         /**
 865          * @brief add table definition to fields in an SQL query
 866          *
 867          * @param string $query SQL query
 868          * @param array $fields The field definition array
 869          *
 870          * @return string the changed SQL query
 871          */
 872         private static function addTablesToFields($query, $fields)
 873         {
 874                 foreach ($fields as $table => $table_fields) {
 875                         foreach ($table_fields as $alias => $field) {
 876                                 if (is_int($alias)) {
 877                                         $replace_field = $field;
 878                                 } else {
 879                                         $replace_field = $alias;
 880                                 }
 881
 882                                 $search = "/([^\.])`" . $field . "`/i";
 883                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 884                                 $query = preg_replace($search, $replace, $query);
 885                         }
 886                 }
 887                 return $query;
 888         }
 889
 890         /**
 891          * @brief Update existing item entries
 892          *
 893          * @param array $fields    The fields that are to be changed
 894          * @param array $condition The condition for finding the item entries
 895          *
 896          * In the future we may have to change permissions as well.
 897          * Then we had to add the user id as third parameter.
 898          *
 899          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 900          *
 901          * @return integer|boolean number of affected rows - or "false" if there was an error
 902          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 903          */
 904         public static function update(array $fields, array $condition)
 905         {
 906                 if (empty($condition) || empty($fields)) {
 907                         return false;
 908                 }
 909
 910                 // To ensure the data integrity we do it in an transaction
 911                 DBA::transaction();
 912
 913                 // We cannot simply expand the condition to check for origin entries
 914                 // The condition needn't to be a simple array but could be a complex condition.
 915                 // And we have to execute this query before the update to ensure to fetch the same data.
 916                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 917
 918                 $content_fields = [];
 919                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 920                         if (isset($fields[$field])) {
 921                                 $content_fields[$field] = $fields[$field];
 922                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 923                                         unset($fields[$field]);
 924                                 } else {
 925                                         $fields[$field] = null;
 926                                 }
 927                         }
 928                 }
 929
 930                 $delivery_data = ItemDeliveryData::extractFields($fields);
 931
 932                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 933                 foreach ($clear_fields as $field) {
 934                         if (array_key_exists($field, $fields)) {
 935                                 $fields[$field] = null;
 936                         }
 937                 }
 938
 939                 if (array_key_exists('tag', $fields)) {
 940                         $tags = $fields['tag'];
 941                         $fields['tag'] = null;
 942                 } else {
 943                         $tags = null;
 944                 }
 945
 946                 if (array_key_exists('file', $fields)) {
 947                         $files = $fields['file'];
 948                         $fields['file'] = null;
 949                 } else {
 950                         $files = null;
 951                 }
 952
 953                 if (!empty($fields)) {
 954                         $success = DBA::update('item', $fields, $condition);
 955
 956                         if (!$success) {
 957                                 DBA::close($items);
 958                                 DBA::rollback();
 959                                 return false;
 960                         }
 961                 }
 962
 963                 // When there is no content for the "old" item table, this will count the fetched items
 964                 $rows = DBA::affectedRows();
 965
 966                 $notify_items = [];
 967
 968                 while ($item = DBA::fetch($items)) {
 969                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 970                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 971
 972                                 if (empty($item['iaid'])) {
 973                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 974                                         if (DBA::isResult($item_activity)) {
 975                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 976                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 977                                                         if (self::isLegacyMode()) {
 978                                                                 $item_fields[$field] = null;
 979                                                         } else {
 980                                                                 unset($item_fields[$field]);
 981                                                         }
 982                                                 }
 983                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 984
 985                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 986                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 987                                                 }
 988                                         }
 989                                 } elseif (!empty($item['icid'])) {
 990                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 991
 992                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 993                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 994                                         }
 995                                 }
 996                         } else {
 997                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 998
 999                                 if (empty($item['icid'])) {
1000                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
1001                                         if (DBA::isResult($item_content)) {
1002                                                 $item_fields = ['icid' => $item_content['id']];
1003                                                 // Clear all fields in the item table that have a content in the item-content table
1004                                                 foreach ($item_content as $field => $content) {
1005                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1006                                                                 if (self::isLegacyMode()) {
1007                                                                         $item_fields[$field] = null;
1008                                                                 } else {
1009                                                                         unset($item_fields[$field]);
1010                                                                 }
1011                                                         }
1012                                                 }
1013                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1014                                         }
1015                                 }
1016                         }
1017
1018                         if (!is_null($tags)) {
1019                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1020                                 if (!empty($item['tag'])) {
1021                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1022                                 }
1023                         }
1024
1025                         if (!is_null($files)) {
1026                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1027                                 if (!empty($item['file'])) {
1028                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1029                                 }
1030                         }
1031
1032                         ItemDeliveryData::update($item['id'], $delivery_data);
1033
1034                         self::updateThread($item['id']);
1035
1036                         // We only need to notfiy others when it is an original entry from us.
1037                         // Only call the notifier when the item has some content relevant change.
1038                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1039                                 $notify_items[] = $item['id'];
1040                         }
1041                 }
1042
1043                 DBA::close($items);
1044                 DBA::commit();
1045
1046                 foreach ($notify_items as $notify_item) {
1047                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1048                 }
1049
1050                 return $rows;
1051         }
1052
1053         /**
1054          * @brief Delete an item and notify others about it - if it was ours
1055          *
1056          * @param array   $condition The condition for finding the item entries
1057          * @param integer $priority  Priority for the notification
1058          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1059          */
1060         public static function delete($condition, $priority = PRIORITY_HIGH)
1061         {
1062                 $items = self::select(['id'], $condition);
1063                 while ($item = self::fetch($items)) {
1064                         self::deleteById($item['id'], $priority);
1065                 }
1066                 DBA::close($items);
1067         }
1068
1069         /**
1070          * @brief Delete an item for an user and notify others about it - if it was ours
1071          *
1072          * @param array   $condition The condition for finding the item entries
1073          * @param integer $uid       User who wants to delete this item
1074          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1075          */
1076         public static function deleteForUser($condition, $uid)
1077         {
1078                 if ($uid == 0) {
1079                         return;
1080                 }
1081
1082                 $items = self::select(['id', 'uid'], $condition);
1083                 while ($item = self::fetch($items)) {
1084                         // "Deleting" global items just means hiding them
1085                         if ($item['uid'] == 0) {
1086                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1087
1088                                 // Delete notifications
1089                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1090                         } elseif ($item['uid'] == $uid) {
1091                                 self::deleteById($item['id'], PRIORITY_HIGH);
1092                         } else {
1093                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1094                         }
1095                 }
1096                 DBA::close($items);
1097         }
1098
1099         /**
1100          * @brief Delete an item and notify others about it - if it was ours
1101          *
1102          * @param integer $item_id  Item ID that should be delete
1103          * @param integer $priority Priority for the notification
1104          *
1105          * @return boolean success
1106          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1107          */
1108         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
1109         {
1110                 // locate item to be deleted
1111                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1112                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1113                         'verb', 'object-type', 'object', 'target', 'contact-id',
1114                         'icid', 'iaid', 'psid'];
1115                 $item = self::selectFirst($fields, ['id' => $item_id]);
1116                 if (!DBA::isResult($item)) {
1117                         Logger::log('Item with ID ' . $item_id . " hasn't been found.", Logger::DEBUG);
1118                         return false;
1119                 }
1120
1121                 if ($item['deleted']) {
1122                         Logger::log('Item with ID ' . $item_id . ' has already been deleted.', Logger::DEBUG);
1123                         return false;
1124                 }
1125
1126                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1127                 if (!DBA::isResult($parent)) {
1128                         $parent = ['origin' => false];
1129                 }
1130
1131                 // clean up categories and tags so they don't end up as orphans
1132
1133                 $matches = false;
1134                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1135
1136                 if ($cnt) {
1137                         foreach ($matches as $mtch) {
1138                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1139                         }
1140                 }
1141
1142                 $matches = false;
1143
1144                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1145
1146                 if ($cnt) {
1147                         foreach ($matches as $mtch) {
1148                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1149                         }
1150                 }
1151
1152                 /*
1153                  * If item is a link to a photo resource, nuke all the associated photos
1154                  * (visitors will not have photo resources)
1155                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1156                  * generate a resource-id and therefore aren't intimately linked to the item.
1157                  */
1158                 /// @TODO: this should first check if photo is used elsewhere
1159                 if (strlen($item['resource-id'])) {
1160                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1161                 }
1162
1163                 // If item is a link to an event, delete the event.
1164                 if (intval($item['event-id'])) {
1165                         Event::delete($item['event-id']);
1166                 }
1167
1168                 // If item has attachments, drop them
1169                 /// @TODO: this should first check if attachment is used elsewhere
1170                 foreach (explode(",", $item['attach']) as $attach) {
1171                         preg_match("|attach/(\d+)|", $attach, $matches);
1172                         if (is_array($matches) && count($matches) > 1) {
1173                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1174                         }
1175                 }
1176
1177                 // Delete tags that had been attached to other items
1178                 self::deleteTagsFromItem($item);
1179
1180                 // Delete notifications
1181                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1182
1183                 // Set the item to "deleted"
1184                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1185                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1186
1187                 Term::insertFromTagFieldByItemId($item['id'], '');
1188                 Term::insertFromFileFieldByItemId($item['id'], '');
1189                 self::deleteThread($item['id'], $item['parent-uri']);
1190
1191                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1192                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1193                 }
1194
1195                 ItemDeliveryData::delete($item['id']);
1196
1197                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1198
1199                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1200                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1201                 }
1202                 // When the permission set will be used in photo and events as well,
1203                 // this query here needs to be extended.
1204                 // @todo Currently deactivated. We need the permission set in the deletion process.
1205                 // This is a reminder to add the removal somewhere else.
1206                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1207                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1208                 //}
1209
1210                 // If it's the parent of a comment thread, kill all the kids
1211                 if ($item['id'] == $item['parent']) {
1212                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1213                 }
1214
1215                 // Is it our comment and/or our thread?
1216                 if ($item['origin'] || $parent['origin']) {
1217
1218                         // When we delete the original post we will delete all existing copies on the server as well
1219                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1220
1221                         // send the notification upstream/downstream
1222                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1223                 } elseif ($item['uid'] != 0) {
1224
1225                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1226                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1227                         if (DBA::isResult($global_item)) {
1228                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1229                         }
1230                 }
1231
1232                 Logger::log('Item with ID ' . $item_id . " has been deleted.", Logger::DEBUG);
1233
1234                 return true;
1235         }
1236
1237         private static function deleteTagsFromItem($item)
1238         {
1239                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1240                         return;
1241                 }
1242
1243                 $xo = XML::parseString($item["object"], false);
1244                 $xt = XML::parseString($item["target"], false);
1245
1246                 if ($xt->type != Activity\ObjectType::NOTE) {
1247                         return;
1248                 }
1249
1250                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1251                 if (!DBA::isResult($i)) {
1252                         return;
1253                 }
1254
1255                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1256                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1257                 $author_copy = $item["origin"];
1258
1259                 if (($owner_remove && $author_copy) || !$owner_remove) {
1260                         return;
1261                 }
1262
1263                 $tags = explode(',', $i["tag"]);
1264                 $newtags = [];
1265                 if (count($tags)) {
1266                         foreach ($tags as $tag) {
1267                                 if (trim($tag) !== trim($xo->body)) {
1268                                        $newtags[] = trim($tag);
1269                                 }
1270                         }
1271                 }
1272                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1273         }
1274
1275         private static function guid($item, $notify)
1276         {
1277                 if (!empty($item['guid'])) {
1278                         return Strings::escapeTags(trim($item['guid']));
1279                 }
1280
1281                 if ($notify) {
1282                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1283                         // We add the hash of our own host because our host is the original creator of the post.
1284                         $prefix_host = \get_app()->getHostName();
1285                 } else {
1286                         $prefix_host = '';
1287
1288                         // We are only storing the post so we create a GUID from the original hostname.
1289                         if (!empty($item['author-link'])) {
1290                                 $parsed = parse_url($item['author-link']);
1291                                 if (!empty($parsed['host'])) {
1292                                         $prefix_host = $parsed['host'];
1293                                 }
1294                         }
1295
1296                         if (empty($prefix_host) && !empty($item['plink'])) {
1297                                 $parsed = parse_url($item['plink']);
1298                                 if (!empty($parsed['host'])) {
1299                                         $prefix_host = $parsed['host'];
1300                                 }
1301                         }
1302
1303                         if (empty($prefix_host) && !empty($item['uri'])) {
1304                                 $parsed = parse_url($item['uri']);
1305                                 if (!empty($parsed['host'])) {
1306                                         $prefix_host = $parsed['host'];
1307                                 }
1308                         }
1309
1310                         // Is it in the format data@host.tld? - Used for mail contacts
1311                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1312                                 $mailparts = explode('@', $item['author-link']);
1313                                 $prefix_host = array_pop($mailparts);
1314                         }
1315                 }
1316
1317                 if (!empty($item['plink'])) {
1318                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1319                 } elseif (!empty($item['uri'])) {
1320                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1321                 } else {
1322                         $guid = System::createUUID(hash('crc32', $prefix_host));
1323                 }
1324
1325                 return $guid;
1326         }
1327
1328         private static function contactId($item)
1329         {
1330                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1331                         return $item['contact-id'];
1332                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1333                         return $item['contact-id'];
1334                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1335                         return $item['author-id'];
1336                 } elseif (!empty($item['contact-id'])) {
1337                         return $item['contact-id'];
1338                 } else {
1339                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1340                         if (!empty($contact_id)) {
1341                                 return $contact_id;
1342                         }
1343                 }
1344                 return $item['author-id'];
1345         }
1346
1347         // This function will finally cover most of the preparation functionality in mod/item.php
1348         public static function prepare(&$item)
1349         {
1350                 /*
1351                  * @TODO: Unused code triggering inspection errors
1352                  *
1353                 $data = BBCode::getAttachmentData($item['body']);
1354                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1355                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1356                         $posttype = Item::PT_PAGE;
1357                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1358                 }
1359                  */
1360         }
1361
1362         /**
1363          * Write an item array into a spool file to be inserted later.
1364          * This command is called whenever there are issues storing an item.
1365          *
1366          * @param array $item The item fields that are to be inserted
1367          * @throws \Exception
1368          */
1369         private static function spool($orig_item)
1370         {
1371                 // Now we store the data in the spool directory
1372                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1373                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1374
1375                 $spoolpath = get_spoolpath();
1376                 if ($spoolpath != "") {
1377                         $spool = $spoolpath . '/' . $file;
1378
1379                         file_put_contents($spool, json_encode($orig_item));
1380                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1381                 }
1382         }
1383
1384         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1385         {
1386                 $orig_item = $item;
1387
1388                 $priority = PRIORITY_HIGH;
1389
1390                 // If it is a posting where users should get notifications, then define it as wall posting
1391                 if ($notify) {
1392                         $item['wall'] = 1;
1393                         $item['origin'] = 1;
1394                         $item['network'] = Protocol::DFRN;
1395                         $item['protocol'] = Conversation::PARCEL_DFRN;
1396
1397                         if (is_int($notify)) {
1398                                 $priority = $notify;
1399                         }
1400                 } else {
1401                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1402                 }
1403
1404                 $item['guid'] = self::guid($item, $notify);
1405                 $item['uri'] = Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid'])));
1406
1407                 // Store URI data
1408                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1409
1410                 // Store conversation data
1411                 $item = Conversation::insert($item);
1412
1413                 /*
1414                  * If a Diaspora signature structure was passed in, pull it out of the
1415                  * item array and set it aside for later storage.
1416                  */
1417
1418                 $dsprsig = null;
1419                 if (isset($item['dsprsig'])) {
1420                         $encoded_signature = $item['dsprsig'];
1421                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1422                         unset($item['dsprsig']);
1423                 }
1424
1425                 $diaspora_signed_text = '';
1426                 if (isset($item['diaspora_signed_text'])) {
1427                         $diaspora_signed_text = $item['diaspora_signed_text'];
1428                         unset($item['diaspora_signed_text']);
1429                 }
1430
1431                 // Converting the plink
1432                 /// @TODO Check if this is really still needed
1433                 if ($item['network'] == Protocol::OSTATUS) {
1434                         if (isset($item['plink'])) {
1435                                 $item['plink'] = OStatus::convertHref($item['plink']);
1436                         } elseif (isset($item['uri'])) {
1437                                 $item['plink'] = OStatus::convertHref($item['uri']);
1438                         }
1439                 }
1440
1441                 if (!empty($item['thr-parent'])) {
1442                         $item['parent-uri'] = $item['thr-parent'];
1443                 }
1444
1445                 /** @var Activity $activity */
1446                 $activity = self::getClass(Activity::class);
1447
1448                 if (isset($item['gravity'])) {
1449                         $item['gravity'] = intval($item['gravity']);
1450                 } elseif ($item['parent-uri'] === $item['uri']) {
1451                         $item['gravity'] = GRAVITY_PARENT;
1452                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1453                         $item['gravity'] = GRAVITY_COMMENT;
1454                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1455                         $item['gravity'] = GRAVITY_ACTIVITY;
1456                 } else {
1457                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1458                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1459                 }
1460
1461                 $uid = intval($item['uid']);
1462
1463                 // check for create date and expire time
1464                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1465
1466                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1467                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1468                         $expire_interval = $user['expire'];
1469                 }
1470
1471                 if (($expire_interval > 0) && !empty($item['created'])) {
1472                         $expire_date = time() - ($expire_interval * 86400);
1473                         $created_date = strtotime($item['created']);
1474                         if ($created_date < $expire_date) {
1475                                 Logger::notice('Item created before expiration interval.', [
1476                                         'created' => date('c', $created_date),
1477                                         'expired' => date('c', $expire_date),
1478                                         '$item' => $item
1479                                 ]);
1480                                 return 0;
1481                         }
1482                 }
1483
1484                 /*
1485                  * Do we already have this item?
1486                  * We have to check several networks since Friendica posts could be repeated
1487                  * via OStatus (maybe Diasporsa as well)
1488                  */
1489                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1490                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1491                                 trim($item['uri']), $item['uid'],
1492                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1493                         $existing = self::selectFirst(['id', 'network'], $condition);
1494                         if (DBA::isResult($existing)) {
1495                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1496                                 if ($uid != 0) {
1497                                         Logger::notice('Item already existed for user', [
1498                                                 'uri' => $item['uri'],
1499                                                 'uid' => $uid,
1500                                                 'network' => $item['network'],
1501                                                 'existing_id' => $existing["id"],
1502                                                 'existing_network' => $existing["network"]
1503                                         ]);
1504                                 }
1505
1506                                 return $existing["id"];
1507                         }
1508                 }
1509
1510                 $item['wall']          = intval($item['wall'] ?? 0);
1511                 $item['extid']         = trim($item['extid'] ?? '');
1512                 $item['author-name']   = trim($item['author-name'] ?? '');
1513                 $item['author-link']   = trim($item['author-link'] ?? '');
1514                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1515                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1516                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1517                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1518                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1519                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1520                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1521                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1522                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1523                 $item['title']         = trim($item['title'] ?? '');
1524                 $item['location']      = trim($item['location'] ?? '');
1525                 $item['coord']         = trim($item['coord'] ?? '');
1526                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1527                 $item['deleted']       = 0;
1528                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1529                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1530                 $item['verb']          = trim($item['verb'] ?? '');
1531                 $item['object-type']   = trim($item['object-type'] ?? '');
1532                 $item['object']        = trim($item['object'] ?? '');
1533                 $item['target-type']   = trim($item['target-type'] ?? '');
1534                 $item['target']        = trim($item['target'] ?? '');
1535                 $item['plink']         = trim($item['plink'] ?? '');
1536                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1537                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1538                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1539                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1540                 $item['private']       = intval($item['private'] ?? 0);
1541                 $item['body']          = trim($item['body'] ?? '');
1542                 $item['tag']           = trim($item['tag'] ?? '');
1543                 $item['attach']        = trim($item['attach'] ?? '');
1544                 $item['app']           = trim($item['app'] ?? '');
1545                 $item['origin']        = intval($item['origin'] ?? 0);
1546                 $item['postopts']      = trim($item['postopts'] ?? '');
1547                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1548                 $item['event-id']      = intval($item['event-id'] ?? 0);
1549                 $item['inform']        = trim($item['inform'] ?? '');
1550                 $item['file']          = trim($item['file'] ?? '');
1551
1552                 // When there is no content then we don't post it
1553                 if ($item['body'].$item['title'] == '') {
1554                         Logger::notice('No body, no title.');
1555                         return 0;
1556                 }
1557
1558                 self::addLanguageToItemArray($item);
1559
1560                 // Items cannot be stored before they happen ...
1561                 if ($item['created'] > DateTimeFormat::utcNow()) {
1562                         $item['created'] = DateTimeFormat::utcNow();
1563                 }
1564
1565                 // We haven't invented time travel by now.
1566                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1567                         $item['edited'] = DateTimeFormat::utcNow();
1568                 }
1569
1570                 $item['plink'] = ($item['plink'] ?? '') ?: System::baseUrl() . '/display/' . urlencode($item['guid']);
1571
1572                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1573                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1574
1575                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1576
1577                 if (Contact::isBlocked($item['author-id'])) {
1578                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1579                         return 0;
1580                 }
1581
1582                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1583                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1584                         return 0;
1585                 }
1586
1587                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1588                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1589                         return 0;
1590                 }
1591
1592                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1593                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1594
1595                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1596
1597                 if (Contact::isBlocked($item['owner-id'])) {
1598                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1599                         return 0;
1600                 }
1601
1602                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1603                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1604                         return 0;
1605                 }
1606
1607                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1608                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1609                         return 0;
1610                 }
1611
1612                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1613                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1614                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1615                         return 0;
1616                 }
1617
1618                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1619                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1620                         return 0;
1621                 }
1622
1623                 // We don't store the causer, we only have it here for the checks above
1624                 unset($item['causer-id']);
1625                 unset($item['causer-link']);
1626
1627                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1628                 $item["contact-id"] = self::contactId($item);
1629
1630                 if ($item['network'] == Protocol::PHANTOM) {
1631                         $item['network'] = Protocol::DFRN;
1632                         Logger::notice('Missing network, setting to {network}.', [
1633                                 'uri' => $item["uri"],
1634                                 'network' => $item['network'],
1635                                 'callstack' => System::callstack()
1636                         ]);
1637                 }
1638
1639                 // Checking if there is already an item with the same guid
1640                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1641                 if (self::exists($condition)) {
1642                         Logger::notice('Found already existing item', [
1643                                 'guid' => $item['guid'],
1644                                 'uid' => $item['uid'],
1645                                 'network' => $item['network']
1646                         ]);
1647                         return 0;
1648                 }
1649
1650                 if ($item['verb'] == Activity::FOLLOW) {
1651                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1652                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1653                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1654                                 return 0;
1655                         }
1656
1657                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1658                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1659                         if (self::exists($condition)) {
1660                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1661                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1662                                 return 0;
1663                         }
1664                 }
1665
1666                 // Check for hashtags in the body and repair or add hashtag links
1667                 self::setHashtags($item);
1668
1669                 $item['thr-parent'] = $item['parent-uri'];
1670
1671                 $notify_type = Delivery::POST;
1672                 $allow_cid = '';
1673                 $allow_gid = '';
1674                 $deny_cid  = '';
1675                 $deny_gid  = '';
1676
1677                 if ($item['parent-uri'] === $item['uri']) {
1678                         $parent_id = 0;
1679                         $parent_deleted = 0;
1680                         $allow_cid = $item['allow_cid'];
1681                         $allow_gid = $item['allow_gid'];
1682                         $deny_cid  = $item['deny_cid'];
1683                         $deny_gid  = $item['deny_gid'];
1684                 } else {
1685                         // find the parent and snarf the item id and ACLs
1686                         // and anything else we need to inherit
1687
1688                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1689                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1690                                 'wall', 'private', 'forum_mode', 'origin'];
1691                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1692                         $params = ['order' => ['id' => false]];
1693                         $parent = self::selectFirst($fields, $condition, $params);
1694
1695                         if (DBA::isResult($parent)) {
1696                                 // is the new message multi-level threaded?
1697                                 // even though we don't support it now, preserve the info
1698                                 // and re-attach to the conversation parent.
1699
1700                                 if ($parent['uri'] != $parent['parent-uri']) {
1701                                         $item['parent-uri'] = $parent['parent-uri'];
1702
1703                                         $condition = ['uri' => $item['parent-uri'],
1704                                                 'parent-uri' => $item['parent-uri'],
1705                                                 'uid' => $item['uid']];
1706                                         $params = ['order' => ['id' => false]];
1707                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1708
1709                                         if (DBA::isResult($toplevel_parent)) {
1710                                                 $parent = $toplevel_parent;
1711                                         }
1712                                 }
1713
1714                                 $parent_id      = $parent['id'];
1715                                 $parent_deleted = $parent['deleted'];
1716                                 $allow_cid      = $parent['allow_cid'];
1717                                 $allow_gid      = $parent['allow_gid'];
1718                                 $deny_cid       = $parent['deny_cid'];
1719                                 $deny_gid       = $parent['deny_gid'];
1720                                 $item['wall']   = $parent['wall'];
1721
1722                                 /*
1723                                  * If the parent is private, force privacy for the entire conversation
1724                                  * This differs from the above settings as it subtly allows comments from
1725                                  * email correspondents to be private even if the overall thread is not.
1726                                  */
1727                                 if ($parent['private']) {
1728                                         $item['private'] = $parent['private'];
1729                                 }
1730
1731                                 /*
1732                                  * Edge case. We host a public forum that was originally posted to privately.
1733                                  * The original author commented, but as this is a comment, the permissions
1734                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1735                                  */
1736                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1737                                         $item['private'] = 0;
1738                                 }
1739
1740                                 // If its a post that originated here then tag the thread as "mention"
1741                                 if ($item['origin'] && $item['uid']) {
1742                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1743                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1744                                 }
1745                         } else {
1746                                 /*
1747                                  * Allow one to see reply tweets from status.net even when
1748                                  * we don't have or can't see the original post.
1749                                  */
1750                                 if ($force_parent) {
1751                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1752                                         $parent_id = 0;
1753                                         $item['parent-uri'] = $item['uri'];
1754                                         $item['gravity'] = GRAVITY_PARENT;
1755                                 } else {
1756                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1757                                         return 0;
1758                                 }
1759
1760                                 $parent_deleted = 0;
1761                         }
1762                 }
1763
1764                 if (stristr($item['verb'], Activity::POKE)) {
1765                         $notify_type = Delivery::POKE;
1766                 }
1767
1768                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1769                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1770
1771                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1772                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1773                 if (self::exists($condition)) {
1774                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1775                         return 0;
1776                 }
1777
1778                 // On Friendica and Diaspora the GUID is unique
1779                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1780                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1781                         if (self::exists($condition)) {
1782                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1783                                 return 0;
1784                         }
1785                 } elseif ($item['network'] == Protocol::OSTATUS) {
1786                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1787                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1788                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1789                         if (self::exists($condition)) {
1790                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1791                                 return 0;
1792                         }
1793                 }
1794
1795                 // Is this item available in the global items (with uid=0)?
1796                 if ($item["uid"] == 0) {
1797                         $item["global"] = true;
1798
1799                         // Set the global flag on all items if this was a global item entry
1800                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1801                 } else {
1802                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1803                 }
1804
1805                 // ACL settings
1806                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1807                         $private = 1;
1808                 } else {
1809                         $private = $item['private'];
1810                 }
1811
1812                 $item["allow_cid"] = $allow_cid;
1813                 $item["allow_gid"] = $allow_gid;
1814                 $item["deny_cid"] = $deny_cid;
1815                 $item["deny_gid"] = $deny_gid;
1816                 $item["private"] = $private;
1817                 $item["deleted"] = $parent_deleted;
1818
1819                 // Fill the cache field
1820                 self::putInCache($item);
1821
1822                 if ($notify) {
1823                         $item['edit'] = false;
1824                         $item['parent'] = $parent_id;
1825                         Hook::callAll('post_local', $item);
1826                         unset($item['edit']);
1827                         unset($item['parent']);
1828                 } else {
1829                         Hook::callAll('post_remote', $item);
1830                 }
1831
1832                 // This array field is used to trigger some automatic reactions
1833                 // It is mainly used in the "post_local" hook.
1834                 unset($item['api_source']);
1835
1836                 if (!empty($item['cancel'])) {
1837                         Logger::log('post cancelled by addon.');
1838                         return 0;
1839                 }
1840
1841                 /*
1842                  * Check for already added items.
1843                  * There is a timing issue here that sometimes creates double postings.
1844                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1845                  */
1846                 if ($item["uid"] == 0) {
1847                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1848                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1849                                 return 0;
1850                         }
1851                 }
1852
1853                 Logger::log('' . print_r($item,true), Logger::DATA);
1854
1855                 if (array_key_exists('tag', $item)) {
1856                         $tags = $item['tag'];
1857                         unset($item['tag']);
1858                 } else {
1859                         $tags = '';
1860                 }
1861
1862                 if (array_key_exists('file', $item)) {
1863                         $files = $item['file'];
1864                         unset($item['file']);
1865                 } else {
1866                         $files = '';
1867                 }
1868
1869                 // Creates or assigns the permission set
1870                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1871
1872                 // We are doing this outside of the transaction to avoid timing problems
1873                 if (!self::insertActivity($item)) {
1874                         self::insertContent($item);
1875                 }
1876
1877                 $delivery_data = ItemDeliveryData::extractFields($item);
1878
1879                 unset($item['postopts']);
1880                 unset($item['inform']);
1881
1882                 // These fields aren't stored anymore in the item table, they are fetched upon request
1883                 unset($item['author-link']);
1884                 unset($item['author-name']);
1885                 unset($item['author-avatar']);
1886                 unset($item['author-network']);
1887
1888                 unset($item['owner-link']);
1889                 unset($item['owner-name']);
1890                 unset($item['owner-avatar']);
1891
1892                 $like_no_comment = Config::get('system', 'like_no_comment');
1893
1894                 DBA::transaction();
1895                 $ret = DBA::insert('item', $item);
1896
1897                 // When the item was successfully stored we fetch the ID of the item.
1898                 if (DBA::isResult($ret)) {
1899                         $current_post = DBA::lastInsertId();
1900                 } else {
1901                         // This can happen - for example - if there are locking timeouts.
1902                         DBA::rollback();
1903
1904                         // Store the data into a spool file so that we can try again later.
1905                         self::spool($orig_item);
1906                         return 0;
1907                 }
1908
1909                 if ($current_post == 0) {
1910                         // This is one of these error messages that never should occur.
1911                         Logger::log("couldn't find created item - we better quit now.");
1912                         DBA::rollback();
1913                         return 0;
1914                 }
1915
1916                 // How much entries have we created?
1917                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1918                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1919
1920                 if ($entries > 1) {
1921                         // There are duplicates. We delete our just created entry.
1922                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1923
1924                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1925                         DBA::delete('item', ['id' => $current_post]);
1926                         DBA::commit();
1927                         return 0;
1928                 } elseif ($entries == 0) {
1929                         // This really should never happen since we quit earlier if there were problems.
1930                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1931                         DBA::rollback();
1932                         return 0;
1933                 }
1934
1935                 Logger::log('created item '.$current_post);
1936
1937                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1938                         $parent_id = $current_post;
1939                 }
1940
1941                 // Set parent id
1942                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1943
1944                 $item['id'] = $current_post;
1945                 $item['parent'] = $parent_id;
1946
1947                 // update the commented timestamp on the parent
1948                 // Only update "commented" if it is really a comment
1949                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1950                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1951                 } else {
1952                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1953                 }
1954
1955                 if ($dsprsig) {
1956                         /*
1957                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1958                          * We can check for this condition when we decode and encode the stuff again.
1959                          */
1960                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1961                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1962                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1963                         }
1964
1965                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1966                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1967                         } else {
1968                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1969                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1970                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1971                         }
1972                 }
1973
1974                 if (!empty($diaspora_signed_text)) {
1975                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1976                 }
1977
1978                 if ($item['parent-uri'] === $item['uri']) {
1979                         self::addThread($current_post);
1980                 } else {
1981                         self::updateThread($parent_id);
1982                 }
1983
1984                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1985                         ItemDeliveryData::insert($current_post, $delivery_data);
1986                 }
1987
1988                 DBA::commit();
1989
1990                 /*
1991                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1992                  * This is not perfect - but a workable solution until we found the reason for the problem.
1993                  */
1994                 if (!empty($tags)) {
1995                         Term::insertFromTagFieldByItemId($current_post, $tags);
1996                 }
1997
1998                 if (!empty($files)) {
1999                         Term::insertFromFileFieldByItemId($current_post, $files);
2000                 }
2001
2002                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
2003                 if (self::tagDeliver($item['uid'], $current_post)) {
2004                         // Get the user information for the logging
2005                         $user = User::getById($uid);
2006
2007                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
2008                         return 0;
2009                 }
2010
2011                 if (!$dontcache) {
2012                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2013                         if (DBA::isResult($posted_item)) {
2014                                 if ($notify) {
2015                                         Hook::callAll('post_local_end', $posted_item);
2016                                 } else {
2017                                         Hook::callAll('post_remote_end', $posted_item);
2018                                 }
2019                         } else {
2020                                 Logger::log('new item not found in DB, id ' . $current_post);
2021                         }
2022                 }
2023
2024                 if ($item['parent-uri'] === $item['uri']) {
2025                         self::addShadow($current_post);
2026                 } else {
2027                         self::addShadowPost($current_post);
2028                 }
2029
2030                 self::updateContact($item);
2031
2032                 check_user_notification($current_post);
2033
2034                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2035                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2036                 }
2037
2038                 return $current_post;
2039         }
2040
2041         /**
2042          * @brief Insert a new item content entry
2043          *
2044          * @param array $item The item fields that are to be inserted
2045          * @return bool
2046          * @throws \Exception
2047          */
2048         private static function insertActivity(&$item)
2049         {
2050                 $activity_index = self::activityToIndex($item['verb']);
2051
2052                 if ($activity_index < 0) {
2053                         return false;
2054                 }
2055
2056                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2057
2058                 // We just remove everything that is content
2059                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2060                         unset($item[$field]);
2061                 }
2062
2063                 // To avoid timing problems, we are using locks.
2064                 $locked = Lock::acquire('item_insert_activity');
2065                 if (!$locked) {
2066                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2067                 }
2068
2069                 // Do we already have this content?
2070                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2071                 if (DBA::isResult($item_activity)) {
2072                         $item['iaid'] = $item_activity['id'];
2073                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2074                 } elseif (DBA::insert('item-activity', $fields)) {
2075                         $item['iaid'] = DBA::lastInsertId();
2076                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2077                 } else {
2078                         // This shouldn't happen.
2079                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2080                         Lock::release('item_insert_activity');
2081                         return false;
2082                 }
2083                 if ($locked) {
2084                         Lock::release('item_insert_activity');
2085                 }
2086                 return true;
2087         }
2088
2089         /**
2090          * @brief Insert a new item content entry
2091          *
2092          * @param array $item The item fields that are to be inserted
2093          * @throws \Exception
2094          */
2095         private static function insertContent(&$item)
2096         {
2097                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2098
2099                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2100                         if (isset($item[$field])) {
2101                                 $fields[$field] = $item[$field];
2102                                 unset($item[$field]);
2103                         }
2104                 }
2105
2106                 // To avoid timing problems, we are using locks.
2107                 $locked = Lock::acquire('item_insert_content');
2108                 if (!$locked) {
2109                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2110                 }
2111
2112                 // Do we already have this content?
2113                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2114                 if (DBA::isResult($item_content)) {
2115                         $item['icid'] = $item_content['id'];
2116                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2117                 } elseif (DBA::insert('item-content', $fields)) {
2118                         $item['icid'] = DBA::lastInsertId();
2119                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2120                 } else {
2121                         // This shouldn't happen.
2122                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2123                 }
2124                 if ($locked) {
2125                         Lock::release('item_insert_content');
2126                 }
2127         }
2128
2129         /**
2130          * @brief Update existing item content entries
2131          *
2132          * @param array $item      The item fields that are to be changed
2133          * @param array $condition The condition for finding the item content entries
2134          * @return bool
2135          * @throws \Exception
2136          */
2137         private static function updateActivity($item, $condition)
2138         {
2139                 if (empty($item['verb'])) {
2140                         return false;
2141                 }
2142                 $activity_index = self::activityToIndex($item['verb']);
2143
2144                 if ($activity_index < 0) {
2145                         return false;
2146                 }
2147
2148                 $fields = ['activity' => $activity_index];
2149
2150                 Logger::log('Update activity for ' . json_encode($condition));
2151
2152                 DBA::update('item-activity', $fields, $condition, true);
2153
2154                 return true;
2155         }
2156
2157         /**
2158          * @brief Update existing item content entries
2159          *
2160          * @param array $item      The item fields that are to be changed
2161          * @param array $condition The condition for finding the item content entries
2162          * @throws \Exception
2163          */
2164         private static function updateContent($item, $condition)
2165         {
2166                 // We have to select only the fields from the "item-content" table
2167                 $fields = [];
2168                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2169                         if (isset($item[$field])) {
2170                                 $fields[$field] = $item[$field];
2171                         }
2172                 }
2173
2174                 if (empty($fields)) {
2175                         // when there are no fields at all, just use the condition
2176                         // This is to ensure that we always store content.
2177                         $fields = $condition;
2178                 }
2179
2180                 Logger::log('Update content for ' . json_encode($condition));
2181
2182                 DBA::update('item-content', $fields, $condition, true);
2183         }
2184
2185         /**
2186          * @brief Distributes public items to the receivers
2187          *
2188          * @param integer $itemid      Item ID that should be added
2189          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2190          * @throws \Exception
2191          */
2192         public static function distribute($itemid, $signed_text = '')
2193         {
2194                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2195                 $parent = self::selectFirst(['owner-id'], $condition);
2196                 if (!DBA::isResult($parent)) {
2197                         return;
2198                 }
2199
2200                 // Only distribute public items from native networks
2201                 $condition = ['id' => $itemid, 'uid' => 0,
2202                         'network' => array_merge(Protocol::FEDERATED ,['']),
2203                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2204                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2205                 if (!DBA::isResult($item)) {
2206                         return;
2207                 }
2208
2209                 $origin = $item['origin'];
2210
2211                 unset($item['id']);
2212                 unset($item['parent']);
2213                 unset($item['mention']);
2214                 unset($item['wall']);
2215                 unset($item['origin']);
2216                 unset($item['starred']);
2217
2218                 $users = [];
2219
2220                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2221                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2222                 if (!DBA::isResult($owner)) {
2223                         return;
2224                 }
2225
2226                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2227                 $contacts = DBA::select('contact', ['uid'], $condition);
2228                 while ($contact = DBA::fetch($contacts)) {
2229                         if ($contact['uid'] == 0) {
2230                                 continue;
2231                         }
2232
2233                         $users[$contact['uid']] = $contact['uid'];
2234                 }
2235                 DBA::close($contacts);
2236
2237                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2238                 $contacts = DBA::select('contact', ['uid'], $condition);
2239                 while ($contact = DBA::fetch($contacts)) {
2240                         if ($contact['uid'] == 0) {
2241                                 continue;
2242                         }
2243
2244                         $users[$contact['uid']] = $contact['uid'];
2245                 }
2246                 DBA::close($contacts);
2247
2248                 if (!empty($owner['alias'])) {
2249                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2250                         $contacts = DBA::select('contact', ['uid'], $condition);
2251                         while ($contact = DBA::fetch($contacts)) {
2252                                 if ($contact['uid'] == 0) {
2253                                         continue;
2254                                 }
2255
2256                                 $users[$contact['uid']] = $contact['uid'];
2257                         }
2258                         DBA::close($contacts);
2259                 }
2260
2261                 $origin_uid = 0;
2262
2263                 if ($item['uri'] != $item['parent-uri']) {
2264                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2265                         while ($parent = self::fetch($parents)) {
2266                                 $users[$parent['uid']] = $parent['uid'];
2267                                 if ($parent['origin'] && !$origin) {
2268                                         $origin_uid = $parent['uid'];
2269                                 }
2270                         }
2271                 }
2272
2273                 foreach ($users as $uid) {
2274                         if ($origin_uid == $uid) {
2275                                 $item['diaspora_signed_text'] = $signed_text;
2276                         }
2277                         self::storeForUser($itemid, $item, $uid);
2278                 }
2279         }
2280
2281         /**
2282          * @brief Store public items for the receivers
2283          *
2284          * @param integer $itemid Item ID that should be added
2285          * @param array   $item   The item entry that will be stored
2286          * @param integer $uid    The user that will receive the item entry
2287          * @throws \Exception
2288          */
2289         private static function storeForUser($itemid, $item, $uid)
2290         {
2291                 $item['uid'] = $uid;
2292                 $item['origin'] = 0;
2293                 $item['wall'] = 0;
2294                 if ($item['uri'] == $item['parent-uri']) {
2295                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2296                 } else {
2297                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2298                 }
2299
2300                 if (empty($item['contact-id'])) {
2301                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2302                         if (!DBA::isResult($self)) {
2303                                 return;
2304                         }
2305                         $item['contact-id'] = $self['id'];
2306                 }
2307
2308                 /// @todo Handling of "event-id"
2309
2310                 $notify = false;
2311                 if ($item['uri'] == $item['parent-uri']) {
2312                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2313                         if (DBA::isResult($contact)) {
2314                                 $notify = self::isRemoteSelf($contact, $item);
2315                         }
2316                 }
2317
2318                 $distributed = self::insert($item, false, $notify, true);
2319
2320                 if (!$distributed) {
2321                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2322                 } else {
2323                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2324                 }
2325         }
2326
2327         /**
2328          * @brief Add a shadow entry for a given item id that is a thread starter
2329          *
2330          * We store every public item entry additionally with the user id "0".
2331          * This is used for the community page and for the search.
2332          * It is planned that in the future we will store public item entries only once.
2333          *
2334          * @param integer $itemid Item ID that should be added
2335          * @throws \Exception
2336          */
2337         public static function addShadow($itemid)
2338         {
2339                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2340                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2341                 $item = self::selectFirst($fields, $condition);
2342
2343                 if (!DBA::isResult($item)) {
2344                         return;
2345                 }
2346
2347                 // is it already a copy?
2348                 if (($itemid == 0) || ($item['uid'] == 0)) {
2349                         return;
2350                 }
2351
2352                 // Is it a visible public post?
2353                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2354                         return;
2355                 }
2356
2357                 // is it an entry from a connector? Only add an entry for natively connected networks
2358                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2359                         return;
2360                 }
2361
2362                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2363                         return;
2364                 }
2365
2366                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2367
2368                 if (DBA::isResult($item)) {
2369                         // Preparing public shadow (removing user specific data)
2370                         $item['uid'] = 0;
2371                         unset($item['id']);
2372                         unset($item['parent']);
2373                         unset($item['wall']);
2374                         unset($item['mention']);
2375                         unset($item['origin']);
2376                         unset($item['starred']);
2377                         unset($item['postopts']);
2378                         unset($item['inform']);
2379                         if ($item['uri'] == $item['parent-uri']) {
2380                                 $item['contact-id'] = $item['owner-id'];
2381                         } else {
2382                                 $item['contact-id'] = $item['author-id'];
2383                         }
2384
2385                         $public_shadow = self::insert($item, false, false, true);
2386
2387                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2388                 }
2389         }
2390
2391         /**
2392          * @brief Add a shadow entry for a given item id that is a comment
2393          *
2394          * This function does the same like the function above - but for comments
2395          *
2396          * @param integer $itemid Item ID that should be added
2397          * @throws \Exception
2398          */
2399         public static function addShadowPost($itemid)
2400         {
2401                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2402                 if (!DBA::isResult($item)) {
2403                         return;
2404                 }
2405
2406                 // Is it a toplevel post?
2407                 if ($item['id'] == $item['parent']) {
2408                         self::addShadow($itemid);
2409                         return;
2410                 }
2411
2412                 // Is this a shadow entry?
2413                 if ($item['uid'] == 0) {
2414                         return;
2415                 }
2416
2417                 // Is there a shadow parent?
2418                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2419                         return;
2420                 }
2421
2422                 // Is there already a shadow entry?
2423                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2424                         return;
2425                 }
2426
2427                 // Save "origin" and "parent" state
2428                 $origin = $item['origin'];
2429                 $parent = $item['parent'];
2430
2431                 // Preparing public shadow (removing user specific data)
2432                 $item['uid'] = 0;
2433                 unset($item['id']);
2434                 unset($item['parent']);
2435                 unset($item['wall']);
2436                 unset($item['mention']);
2437                 unset($item['origin']);
2438                 unset($item['starred']);
2439                 unset($item['postopts']);
2440                 unset($item['inform']);
2441                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2442
2443                 $public_shadow = self::insert($item, false, false, true);
2444
2445                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2446
2447                 // If this was a comment to a Diaspora post we don't get our comment back.
2448                 // This means that we have to distribute the comment by ourselves.
2449                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2450                         self::distribute($public_shadow);
2451                 }
2452         }
2453
2454         /**
2455          * Adds a language specification in a "language" element of given $arr.
2456          * Expects "body" element to exist in $arr.
2457          *
2458          * @param $item
2459          * @throws \Text_LanguageDetect_Exception
2460          */
2461         private static function addLanguageToItemArray(&$item)
2462         {
2463                 $naked_body = BBCode::toPlaintext($item['body'], false);
2464
2465                 $ld = new Text_LanguageDetect();
2466                 $ld->setNameMode(2);
2467                 $languages = $ld->detect($naked_body, 3);
2468
2469                 if (is_array($languages)) {
2470                         $item['language'] = json_encode($languages);
2471                 }
2472         }
2473
2474         /**
2475          * @brief Creates an unique guid out of a given uri
2476          *
2477          * @param string $uri uri of an item entry
2478          * @param string $host hostname for the GUID prefix
2479          * @return string unique guid
2480          */
2481         public static function guidFromUri($uri, $host)
2482         {
2483                 // Our regular guid routine is using this kind of prefix as well
2484                 // We have to avoid that different routines could accidentally create the same value
2485                 $parsed = parse_url($uri);
2486
2487                 // We use a hash of the hostname as prefix for the guid
2488                 $guid_prefix = hash("crc32", $host);
2489
2490                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2491                 unset($parsed["scheme"]);
2492
2493                 // Glue it together to be able to make a hash from it
2494                 $host_id = implode("/", $parsed);
2495
2496                 // We could use any hash algorithm since it isn't a security issue
2497                 $host_hash = hash("ripemd128", $host_id);
2498
2499                 return $guid_prefix.$host_hash;
2500         }
2501
2502         /**
2503          * generate an unique URI
2504          *
2505          * @param integer $uid  User id
2506          * @param string  $guid An existing GUID (Otherwise it will be generated)
2507          *
2508          * @return string
2509          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2510          */
2511         public static function newURI($uid, $guid = "")
2512         {
2513                 if ($guid == "") {
2514                         $guid = System::createUUID();
2515                 }
2516
2517                 return DI::app()->getBaseURL() . '/objects/' . $guid;
2518         }
2519
2520         /**
2521          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2522          *
2523          * This can be used to filter for inactive contacts.
2524          * Only do this for public postings to avoid privacy problems, since poco data is public.
2525          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2526          *
2527          * @param array $arr Contains the just posted item record
2528          * @throws \Exception
2529          */
2530         private static function updateContact($arr)
2531         {
2532                 // Unarchive the author
2533                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2534                 if (DBA::isResult($contact)) {
2535                         Contact::unmarkForArchival($contact);
2536                 }
2537
2538                 // Unarchive the contact if it's not our own contact
2539                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2540                 if (DBA::isResult($contact)) {
2541                         Contact::unmarkForArchival($contact);
2542                 }
2543
2544                 $update = (!$arr['private'] && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2545
2546                 // Is it a forum? Then we don't care about the rules from above
2547                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2548                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2549                                 $update = true;
2550                         }
2551                 }
2552
2553                 if ($update) {
2554                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2555                                 ['id' => $arr['contact-id']]);
2556                 }
2557                 // Now do the same for the system wide contacts with uid=0
2558                 if (!$arr['private']) {
2559                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2560                                 ['id' => $arr['owner-id']]);
2561
2562                         if ($arr['owner-id'] != $arr['author-id']) {
2563                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2564                                         ['id' => $arr['author-id']]);
2565                         }
2566                 }
2567         }
2568
2569         public static function setHashtags(&$item)
2570         {
2571                 $tags = BBCode::getTags($item["body"]);
2572
2573                 // No hashtags?
2574                 if (!count($tags)) {
2575                         return false;
2576                 }
2577
2578                 // What happens in [code], stays in [code]!
2579                 // escape the # and the [
2580                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2581                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2582                         function ($match) {
2583                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2584                                 $find = ['#', '['];
2585                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2586                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2587                         }, $item["body"]);
2588
2589                 // This sorting is important when there are hashtags that are part of other hashtags
2590                 // Otherwise there could be problems with hashtags like #test and #test2
2591                 rsort($tags);
2592
2593                 $URLSearchString = "^\[\]";
2594
2595                 // All hashtags should point to the home server if "local_tags" is activated
2596                 if (Config::get('system', 'local_tags')) {
2597                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2598                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2599
2600                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2601                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2602                 }
2603
2604                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2605                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2606                         function ($match) {
2607                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2608                         }, $item["body"]);
2609
2610                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2611                         function ($match) {
2612                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2613                         }, $item["body"]);
2614
2615                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2616                         function ($match) {
2617                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2618                         }, $item["body"]);
2619
2620                 // Repair recursive urls
2621                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2622                                 "&num;$2", $item["body"]);
2623
2624                 foreach ($tags as $tag) {
2625                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2626                                 continue;
2627                         }
2628
2629                         $basetag = str_replace('_',' ',substr($tag,1));
2630                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2631
2632                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2633
2634                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2635                                 if (strlen($item["tag"])) {
2636                                         $item["tag"] = ',' . $item["tag"];
2637                                 }
2638                                 $item["tag"] = $newtag . $item["tag"];
2639                         }
2640                 }
2641
2642                 // Convert back the masked hashtags
2643                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2644
2645                 // Remember! What happens in [code], stays in [code]
2646                 // roleback the # and [
2647                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2648                         function ($match) {
2649                                 // we truly unESCape all sharp and leftsquarebracket
2650                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2651                                 $replace = ['#', '['];
2652                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2653                         }, $item["body"]);
2654         }
2655
2656         /**
2657          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2658          *
2659          * @param int $uid
2660          * @param int $item_id
2661          * @return boolean true if item was deleted, else false
2662          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2663          * @throws \ImagickException
2664          */
2665         private static function tagDeliver($uid, $item_id)
2666         {
2667                 $mention = false;
2668
2669                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2670                 if (!DBA::isResult($user)) {
2671                         return false;
2672                 }
2673
2674                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2675                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2676
2677                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2678                 if (!DBA::isResult($item)) {
2679                         return false;
2680                 }
2681
2682                 $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
2683
2684                 /*
2685                  * Diaspora uses their own hardwired link URL in @-tags
2686                  * instead of the one we supply with webfinger
2687                  */
2688                 $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['nickname']);
2689
2690                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2691                 if ($cnt) {
2692                         foreach ($matches as $mtch) {
2693                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2694                                         $mention = true;
2695                                         Logger::log('mention found: ' . $mtch[2]);
2696                                 }
2697                         }
2698                 }
2699
2700                 if (!$mention) {
2701                         if (($community_page || $prvgroup) &&
2702                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2703                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2704                                 // delete it!
2705                                 Logger::log("no-mention top-level post to community or private group. delete.");
2706                                 DBA::delete('item', ['id' => $item_id]);
2707                                 return true;
2708                         }
2709                         return false;
2710                 }
2711
2712                 $arr = ['item' => $item, 'user' => $user];
2713
2714                 Hook::callAll('tagged', $arr);
2715
2716                 if (!$community_page && !$prvgroup) {
2717                         return false;
2718                 }
2719
2720                 /*
2721                  * tgroup delivery - setup a second delivery chain
2722                  * prevent delivery looping - only proceed
2723                  * if the message originated elsewhere and is a top-level post
2724                  */
2725                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2726                         return false;
2727                 }
2728
2729                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2730                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2731                 if (!DBA::isResult($self)) {
2732                         return false;
2733                 }
2734
2735                 $owner_id = Contact::getIdForURL($self['url']);
2736
2737                 // also reset all the privacy bits to the forum default permissions
2738
2739                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2740
2741                 $psid = PermissionSet::fetchIDForPost($user);
2742
2743                 $forum_mode = ($prvgroup ? 2 : 1);
2744
2745                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2746                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2747                 self::update($fields, ['id' => $item_id]);
2748
2749                 self::updateThread($item_id);
2750
2751                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2752
2753                 return false;
2754         }
2755
2756         public static function isRemoteSelf($contact, &$datarray)
2757         {
2758                 $a = \get_app();
2759
2760                 if (!$contact['remote_self']) {
2761                         return false;
2762                 }
2763
2764                 // Prevent the forwarding of posts that are forwarded
2765                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2766                         Logger::log('Already forwarded', Logger::DEBUG);
2767                         return false;
2768                 }
2769
2770                 // Prevent to forward already forwarded posts
2771                 if ($datarray["app"] == $a->getHostName()) {
2772                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2773                         return false;
2774                 }
2775
2776                 // Only forward posts
2777                 if ($datarray["verb"] != Activity::POST) {
2778                         Logger::log('No post', Logger::DEBUG);
2779                         return false;
2780                 }
2781
2782                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2783                         Logger::log('Not public', Logger::DEBUG);
2784                         return false;
2785                 }
2786
2787                 $datarray2 = $datarray;
2788                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2789                 if ($contact['remote_self'] == 2) {
2790                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2791                                         ['uid' => $contact['uid'], 'self' => true]);
2792                         if (DBA::isResult($self)) {
2793                                 $datarray['contact-id'] = $self["id"];
2794
2795                                 $datarray['owner-name'] = $self["name"];
2796                                 $datarray['owner-link'] = $self["url"];
2797                                 $datarray['owner-avatar'] = $self["thumb"];
2798
2799                                 $datarray['author-name']   = $datarray['owner-name'];
2800                                 $datarray['author-link']   = $datarray['owner-link'];
2801                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2802
2803                                 unset($datarray['edited']);
2804
2805                                 unset($datarray['network']);
2806                                 unset($datarray['owner-id']);
2807                                 unset($datarray['author-id']);
2808                         }
2809
2810                         if ($contact['network'] != Protocol::FEED) {
2811                                 $datarray["guid"] = System::createUUID();
2812                                 unset($datarray["plink"]);
2813                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2814                                 $datarray["parent-uri"] = $datarray["uri"];
2815                                 $datarray["thr-parent"] = $datarray["uri"];
2816                                 $datarray["extid"] = Protocol::DFRN;
2817                                 $urlpart = parse_url($datarray2['author-link']);
2818                                 $datarray["app"] = $urlpart["host"];
2819                         } else {
2820                                 $datarray['private'] = 0;
2821                         }
2822                 }
2823
2824                 if ($contact['network'] != Protocol::FEED) {
2825                         // Store the original post
2826                         $result = self::insert($datarray2, false, false);
2827                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2828                 } else {
2829                         $datarray["app"] = "Feed";
2830                         $result = true;
2831                 }
2832
2833                 // Trigger automatic reactions for addons
2834                 $datarray['api_source'] = true;
2835
2836                 // We have to tell the hooks who we are - this really should be improved
2837                 $_SESSION["authenticated"] = true;
2838                 $_SESSION["uid"] = $contact['uid'];
2839
2840                 return $result;
2841         }
2842
2843         /**
2844          *
2845          * @param string $s
2846          * @param int    $uid
2847          * @param array  $item
2848          * @param int    $cid
2849          * @return string
2850          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2851          * @throws \ImagickException
2852          */
2853         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2854         {
2855                 if (Config::get('system', 'disable_embedded')) {
2856                         return $s;
2857                 }
2858
2859                 Logger::log('check for photos', Logger::DEBUG);
2860                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2861
2862                 $orig_body = $s;
2863                 $new_body = '';
2864
2865                 $img_start = strpos($orig_body, '[img');
2866                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2867                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2868
2869                 while (($img_st_close !== false) && ($img_len !== false)) {
2870                         $img_st_close++; // make it point to AFTER the closing bracket
2871                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2872
2873                         Logger::log('found photo ' . $image, Logger::DEBUG);
2874
2875                         if (stristr($image, $site . '/photo/')) {
2876                                 // Only embed locally hosted photos
2877                                 $replace = false;
2878                                 $i = basename($image);
2879                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2880                                 $x = strpos($i, '-');
2881
2882                                 if ($x) {
2883                                         $res = substr($i, $x + 1);
2884                                         $i = substr($i, 0, $x);
2885                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2886                                         if (DBA::isResult($photo)) {
2887                                                 /*
2888                                                  * Check to see if we should replace this photo link with an embedded image
2889                                                  * 1. No need to do so if the photo is public
2890                                                  * 2. If there's a contact-id provided, see if they're in the access list
2891                                                  *    for the photo. If so, embed it.
2892                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2893                                                  *    permissions, regardless of order but first check to see if they're an exact
2894                                                  *    match to save some processing overhead.
2895                                                  */
2896                                                 if (self::hasPermissions($photo)) {
2897                                                         if ($cid) {
2898                                                                 $recips = self::enumeratePermissions($photo);
2899                                                                 if (in_array($cid, $recips)) {
2900                                                                         $replace = true;
2901                                                                 }
2902                                                         } elseif ($item) {
2903                                                                 if (self::samePermissions($uid, $item, $photo)) {
2904                                                                         $replace = true;
2905                                                                 }
2906                                                         }
2907                                                 }
2908                                                 if ($replace) {
2909                                                         $photo_img = Photo::getImageForPhoto($photo);
2910                                                         // If a custom width and height were specified, apply before embedding
2911                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2912                                                                 Logger::log('scaling photo', Logger::DEBUG);
2913
2914                                                                 $width = intval($match[1]);
2915                                                                 $height = intval($match[2]);
2916
2917                                                                 $photo_img->scaleDown(max($width, $height));
2918                                                         }
2919
2920                                                         $data = $photo_img->asString();
2921                                                         $type = $photo_img->getType();
2922
2923                                                         Logger::log('replacing photo', Logger::DEBUG);
2924                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2925                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2926                                                 }
2927                                         }
2928                                 }
2929                         }
2930
2931                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2932                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2933                         if ($orig_body === false) {
2934                                 $orig_body = '';
2935                         }
2936
2937                         $img_start = strpos($orig_body, '[img');
2938                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2939                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2940                 }
2941
2942                 $new_body = $new_body . $orig_body;
2943
2944                 return $new_body;
2945         }
2946
2947         private static function hasPermissions($obj)
2948         {
2949                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2950                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2951         }
2952
2953         private static function samePermissions($uid, $obj1, $obj2)
2954         {
2955                 // first part is easy. Check that these are exactly the same.
2956                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2957                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2958                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2959                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2960                         return true;
2961                 }
2962
2963                 // This is harder. Parse all the permissions and compare the resulting set.
2964                 $recipients1 = self::enumeratePermissions($obj1);
2965                 $recipients2 = self::enumeratePermissions($obj2);
2966                 sort($recipients1);
2967                 sort($recipients2);
2968
2969                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2970                 return ($recipients1 == $recipients2);
2971         }
2972
2973         /**
2974          * Returns an array of contact-ids that are allowed to see this object
2975          *
2976          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2977          * @param bool  $check_dead Prunes unavailable contacts from the result
2978          * @return array
2979          * @throws \Exception
2980          */
2981         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2982         {
2983                 /** @var ACLFormatter $aclFormater */
2984                 $aclFormater = self::getClass(ACLFormatter::class);
2985
2986                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2987                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2988                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2989                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2990                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2991                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2992                 $recipients   = array_diff($recipients, $deny);
2993                 return $recipients;
2994         }
2995
2996         public static function getFeedTags($item)
2997         {
2998                 $ret = [];
2999                 $matches = false;
3000                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3001                 if ($cnt) {
3002                         for ($x = 0; $x < $cnt; $x ++) {
3003                                 if ($matches[1][$x]) {
3004                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
3005                                 }
3006                         }
3007                 }
3008                 $matches = false;
3009                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3010                 if ($cnt) {
3011                         for ($x = 0; $x < $cnt; $x ++) {
3012                                 if ($matches[1][$x]) {
3013                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3014                                 }
3015                         }
3016                 }
3017                 return $ret;
3018         }
3019
3020         public static function expire($uid, $days, $network = "", $force = false)
3021         {
3022                 if (!$uid || ($days < 1)) {
3023                         return;
3024                 }
3025
3026                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3027                         $uid, GRAVITY_PARENT];
3028
3029                 /*
3030                  * $expire_network_only = save your own wall posts
3031                  * and just expire conversations started by others
3032                  */
3033                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
3034
3035                 if ($expire_network_only) {
3036                         $condition[0] .= " AND NOT `wall`";
3037                 }
3038
3039                 if ($network != "") {
3040                         $condition[0] .= " AND `network` = ?";
3041                         $condition[] = $network;
3042                 }
3043
3044                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3045                 $condition[] = $days;
3046
3047                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3048
3049                 if (!DBA::isResult($items)) {
3050                         return;
3051                 }
3052
3053                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
3054
3055                 // Forcing expiring of items - but not notes and marked items
3056                 if ($force) {
3057                         $expire_items = true;
3058                 }
3059
3060                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
3061                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
3062                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
3063
3064                 $expired = 0;
3065
3066                 while ($item = Item::fetch($items)) {
3067                         // don't expire filed items
3068
3069                         if (strpos($item['file'], '[') !== false) {
3070                                 continue;
3071                         }
3072
3073                         // Only expire posts, not photos and photo comments
3074
3075                         if (!$expire_photos && strlen($item['resource-id'])) {
3076                                 continue;
3077                         } elseif (!$expire_starred && intval($item['starred'])) {
3078                                 continue;
3079                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3080                                 continue;
3081                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3082                                 continue;
3083                         }
3084
3085                         self::deleteById($item['id'], PRIORITY_LOW);
3086
3087                         ++$expired;
3088                 }
3089                 DBA::close($items);
3090                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3091         }
3092
3093         public static function firstPostDate($uid, $wall = false)
3094         {
3095                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3096                 $params = ['order' => ['received' => false]];
3097                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3098                 if (DBA::isResult($thread)) {
3099                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3100                 }
3101                 return false;
3102         }
3103
3104         /**
3105          * @brief add/remove activity to an item
3106          *
3107          * Toggle activities as like,dislike,attend of an item
3108          *
3109          * @param string $item_id
3110          * @param string $verb
3111          *            Activity verb. One of
3112          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3113          *            attendno, unattendno, attendmaybe, unattendmaybe
3114          * @return bool
3115          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3116          * @throws \ImagickException
3117          * @hook  'post_local_end'
3118          *            array $arr
3119          *            'post_id' => ID of posted item
3120          */
3121         public static function performLike($item_id, $verb)
3122         {
3123                 if (!Session::isAuthenticated()) {
3124                         return false;
3125                 }
3126
3127                 switch ($verb) {
3128                         case 'like':
3129                         case 'unlike':
3130                                 $activity = Activity::LIKE;
3131                                 break;
3132                         case 'dislike':
3133                         case 'undislike':
3134                                 $activity = Activity::DISLIKE;
3135                                 break;
3136                         case 'attendyes':
3137                         case 'unattendyes':
3138                                 $activity = Activity::ATTEND;
3139                                 break;
3140                         case 'attendno':
3141                         case 'unattendno':
3142                                 $activity = Activity::ATTENDNO;
3143                                 break;
3144                         case 'attendmaybe':
3145                         case 'unattendmaybe':
3146                                 $activity = Activity::ATTENDMAYBE;
3147                                 break;
3148                         default:
3149                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3150                                 return false;
3151                 }
3152
3153                 // Enable activity toggling instead of on/off
3154                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3155
3156                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3157
3158                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3159                 if (!DBA::isResult($item)) {
3160                         Logger::log('like: unknown item ' . $item_id);
3161                         return false;
3162                 }
3163
3164                 $item_uri = $item['uri'];
3165
3166                 $uid = $item['uid'];
3167                 if (($uid == 0) && local_user()) {
3168                         $uid = local_user();
3169                 }
3170
3171                 if (!Security::canWriteToUserWall($uid)) {
3172                         Logger::log('like: unable to write on wall ' . $uid);
3173                         return false;
3174                 }
3175
3176                 // Retrieves the local post owner
3177                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3178                 if (!DBA::isResult($owner_self_contact)) {
3179                         Logger::log('like: unknown owner ' . $uid);
3180                         return false;
3181                 }
3182
3183                 // Retrieve the current logged in user's public contact
3184                 $author_id = public_contact();
3185
3186                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3187                 if (!DBA::isResult($author_contact)) {
3188                         Logger::log('like: unknown author ' . $author_id);
3189                         return false;
3190                 }
3191
3192                 // Contact-id is the uid-dependant author contact
3193                 if (local_user() == $uid) {
3194                         $item_contact_id = $owner_self_contact['id'];
3195                 } else {
3196                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3197                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3198                         if (!DBA::isResult($item_contact)) {
3199                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3200                                 return false;
3201                         }
3202                 }
3203
3204                 // Look for an existing verb row
3205                 // event participation are essentially radio toggles. If you make a subsequent choice,
3206                 // we need to eradicate your first choice.
3207                 if ($event_verb_flag) {
3208                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3209
3210                         // Translate to the index based activity index
3211                         $activities = [];
3212                         foreach ($verbs as $verb) {
3213                                 $activities[] = self::activityToIndex($verb);
3214                         }
3215                 } else {
3216                         $activities = self::activityToIndex($activity);
3217                 }
3218
3219                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3220                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3221
3222                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3223
3224                 // If it exists, mark it as deleted
3225                 if (DBA::isResult($like_item)) {
3226                         self::deleteById($like_item['id']);
3227
3228                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3229                                 return true;
3230                         }
3231                 }
3232
3233                 // Verb is "un-something", just trying to delete existing entries
3234                 if (strpos($verb, 'un') === 0) {
3235                         return true;
3236                 }
3237
3238                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3239
3240                 $new_item = [
3241                         'guid'          => System::createUUID(),
3242                         'uri'           => self::newURI($item['uid']),
3243                         'uid'           => $item['uid'],
3244                         'contact-id'    => $item_contact_id,
3245                         'wall'          => $item['wall'],
3246                         'origin'        => 1,
3247                         'network'       => Protocol::DFRN,
3248                         'gravity'       => GRAVITY_ACTIVITY,
3249                         'parent'        => $item['id'],
3250                         'parent-uri'    => $item['uri'],
3251                         'thr-parent'    => $item['uri'],
3252                         'owner-id'      => $author_id,
3253                         'author-id'     => $author_id,
3254                         'body'          => $activity,
3255                         'verb'          => $activity,
3256                         'object-type'   => $objtype,
3257                         'allow_cid'     => $item['allow_cid'],
3258                         'allow_gid'     => $item['allow_gid'],
3259                         'deny_cid'      => $item['deny_cid'],
3260                         'deny_gid'      => $item['deny_gid'],
3261                         'visible'       => 1,
3262                         'unseen'        => 1,
3263                 ];
3264
3265                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3266                 if (!empty($signed)) {
3267                         $new_item['diaspora_signed_text'] = json_encode($signed);
3268                 }
3269
3270                 $new_item_id = self::insert($new_item);
3271
3272                 // If the parent item isn't visible then set it to visible
3273                 if (!$item['visible']) {
3274                         self::update(['visible' => true], ['id' => $item['id']]);
3275                 }
3276
3277                 $new_item['id'] = $new_item_id;
3278
3279                 Hook::callAll('post_local_end', $new_item);
3280
3281                 return true;
3282         }
3283
3284         private static function addThread($itemid, $onlyshadow = false)
3285         {
3286                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3287                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3288                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3289                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3290                 $item = self::selectFirst($fields, $condition);
3291
3292                 if (!DBA::isResult($item)) {
3293                         return;
3294                 }
3295
3296                 $item['iid'] = $itemid;
3297
3298                 if (!$onlyshadow) {
3299                         $result = DBA::insert('thread', $item);
3300
3301                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3302                 }
3303         }
3304
3305         private static function updateThread($itemid, $setmention = false)
3306         {
3307                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3308                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3309                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3310                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3311
3312                 $item = self::selectFirst($fields, $condition);
3313                 if (!DBA::isResult($item)) {
3314                         return;
3315                 }
3316
3317                 if ($setmention) {
3318                         $item["mention"] = 1;
3319                 }
3320
3321                 $fields = [];
3322
3323                 foreach ($item as $field => $data) {
3324                         if (!in_array($field, ["guid"])) {
3325                                 $fields[$field] = $data;
3326                         }
3327                 }
3328
3329                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3330
3331                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3332         }
3333
3334         private static function deleteThread($itemid, $itemuri = "")
3335         {
3336                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3337                 if (!DBA::isResult($item)) {
3338                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3339                         return;
3340                 }
3341
3342                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3343
3344                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3345
3346                 if ($itemuri != "") {
3347                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3348                         if (!self::exists($condition)) {
3349                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3350                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3351                         }
3352                 }
3353         }
3354
3355         public static function getPermissionsSQLByUserId($owner_id)
3356         {
3357                 $local_user = local_user();
3358                 $remote_user = Session::getRemoteContactID($owner_id);
3359
3360                 /*
3361                  * Construct permissions
3362                  *
3363                  * default permissions - anonymous user
3364                  */
3365                 $sql = " AND NOT `item`.`private`";
3366
3367                 // Profile owner - everything is visible
3368                 if ($local_user && ($local_user == $owner_id)) {
3369                         $sql = '';
3370                 } elseif ($remote_user) {
3371                         /*
3372                          * Authenticated visitor. Unless pre-verified,
3373                          * check that the contact belongs to this $owner_id
3374                          * and load the groups the visitor belongs to.
3375                          * If pre-verified, the caller is expected to have already
3376                          * done this and passed the groups into this function.
3377                          */
3378                         $set = PermissionSet::get($owner_id, $remote_user);
3379
3380                         if (!empty($set)) {
3381                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3382                         } else {
3383                                 $sql_set = '';
3384                         }
3385
3386                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3387                 }
3388
3389                 return $sql;
3390         }
3391
3392         /**
3393          * get translated item type
3394          *
3395          * @param $item
3396          * @return string
3397          */
3398         public static function postType($item)
3399         {
3400                 if (!empty($item['event-id'])) {
3401                         return L10n::t('event');
3402                 } elseif (!empty($item['resource-id'])) {
3403                         return L10n::t('photo');
3404                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3405                         return L10n::t('activity');
3406                 } elseif ($item['id'] != $item['parent']) {
3407                         return L10n::t('comment');
3408                 }
3409
3410                 return L10n::t('post');
3411         }
3412
3413         /**
3414          * Sets the "rendered-html" field of the provided item
3415          *
3416          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3417          *
3418          * @param array $item
3419          * @param bool  $update
3420          *
3421          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3422          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3423          */
3424         public static function putInCache(&$item, $update = false)
3425         {
3426                 $body = $item["body"];
3427
3428                 $rendered_hash = $item['rendered-hash'] ?? '';
3429                 $rendered_html = $item['rendered-html'] ?? '';
3430
3431                 if ($rendered_hash == ''
3432                         || $rendered_html == ""
3433                         || $rendered_hash != hash("md5", $item["body"])
3434                         || Config::get("system", "ignore_cache")
3435                 ) {
3436                         self::addRedirToImageTags($item);
3437
3438                         $item["rendered-html"] = BBCode::convert($item["body"]);
3439                         $item["rendered-hash"] = hash("md5", $item["body"]);
3440
3441                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3442                         Hook::callAll('put_item_in_cache', $hook_data);
3443                         $item['rendered-html'] = $hook_data['rendered-html'];
3444                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3445                         unset($hook_data);
3446
3447                         // Force an update if the generated values differ from the existing ones
3448                         if ($rendered_hash != $item["rendered-hash"]) {
3449                                 $update = true;
3450                         }
3451
3452                         // Only compare the HTML when we forcefully ignore the cache
3453                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3454                                 $update = true;
3455                         }
3456
3457                         if ($update && !empty($item["id"])) {
3458                                 self::update(
3459                                         [
3460                                                 'rendered-html' => $item["rendered-html"],
3461                                                 'rendered-hash' => $item["rendered-hash"]
3462                                         ],
3463                                         ['id' => $item["id"]]
3464                                 );
3465                         }
3466                 }
3467
3468                 $item["body"] = $body;
3469         }
3470
3471         /**
3472          * @brief Find any non-embedded images in private items and add redir links to them
3473          *
3474          * @param array &$item The field array of an item row
3475          */
3476         private static function addRedirToImageTags(array &$item)
3477         {
3478                 $app = DI::app();
3479
3480                 $matches = [];
3481                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3482                 if ($cnt) {
3483                         foreach ($matches as $mtch) {
3484                                 if (strpos($mtch[1], '/redir') !== false) {
3485                                         continue;
3486                                 }
3487
3488                                 if ((local_user() == $item['uid']) && ($item['private'] == 1) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3489                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3490                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3491                                 }
3492                         }
3493                 }
3494         }
3495
3496         /**
3497          * @brief Given an item array, convert the body element from bbcode to html and add smilie icons.
3498          * If attach is true, also add icons for item attachments.
3499          *
3500          * @param array   $item
3501          * @param boolean $attach
3502          * @param boolean $is_preview
3503          * @return string item body html
3504          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3505          * @throws \ImagickException
3506          * @hook  prepare_body_init item array before any work
3507          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3508          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3509          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3510          */
3511         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3512         {
3513                 $a = DI::app();
3514                 Hook::callAll('prepare_body_init', $item);
3515
3516                 // In order to provide theme developers more possibilities, event items
3517                 // are treated differently.
3518                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3519                         $ev = Event::getItemHTML($item);
3520                         return $ev;
3521                 }
3522
3523                 $tags = Term::populateTagsFromItem($item);
3524
3525                 $item['tags'] = $tags['tags'];
3526                 $item['hashtags'] = $tags['hashtags'];
3527                 $item['mentions'] = $tags['mentions'];
3528
3529                 // Compile eventual content filter reasons
3530                 $filter_reasons = [];
3531                 if (!$is_preview && public_contact() != $item['author-id']) {
3532                         if (!empty($item['content-warning']) && (!local_user() || !PConfig::get(local_user(), 'system', 'disable_cw', false))) {
3533                                 $filter_reasons[] = L10n::t('Content warning: %s', $item['content-warning']);
3534                         }
3535
3536                         $hook_data = [
3537                                 'item' => $item,
3538                                 'filter_reasons' => $filter_reasons
3539                         ];
3540                         Hook::callAll('prepare_body_content_filter', $hook_data);
3541                         $filter_reasons = $hook_data['filter_reasons'];
3542                         unset($hook_data);
3543                 }
3544
3545                 // Update the cached values if there is no "zrl=..." on the links.
3546                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3547
3548                 // Or update it if the current viewer is the intented viewer.
3549                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3550                         $update = true;
3551                 }
3552
3553                 self::putInCache($item, $update);
3554                 $s = $item["rendered-html"];
3555
3556                 $hook_data = [
3557                         'item' => $item,
3558                         'html' => $s,
3559                         'preview' => $is_preview,
3560                         'filter_reasons' => $filter_reasons
3561                 ];
3562                 Hook::callAll('prepare_body', $hook_data);
3563                 $s = $hook_data['html'];
3564                 unset($hook_data);
3565
3566                 if (!$attach) {
3567                         // Replace the blockquotes with quotes that are used in mails.
3568                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3569                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3570                         return $s;
3571                 }
3572
3573                 $as = '';
3574                 $vhead = false;
3575                 $matches = [];
3576                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3577                 foreach ($matches as $mtch) {
3578                         $mime = $mtch[3];
3579
3580                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3581
3582                         if (strpos($mime, 'video') !== false) {
3583                                 if (!$vhead) {
3584                                         $vhead = true;
3585                                         $a->page['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3586                                 }
3587
3588                                 $url_parts = explode('/', $the_url);
3589                                 $id = end($url_parts);
3590                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3591                                         '$video' => [
3592                                                 'id'     => $id,
3593                                                 'title'  => L10n::t('View Video'),
3594                                                 'src'    => $the_url,
3595                                                 'mime'   => $mime,
3596                                         ],
3597                                 ]);
3598                         }
3599
3600                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3601                         if ($filetype) {
3602                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3603                                 $filesubtype = str_replace('.', '-', $filesubtype);
3604                         } else {
3605                                 $filetype = 'unkn';
3606                                 $filesubtype = 'unkn';
3607                         }
3608
3609                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3610                         $title .= ' ' . $mtch[2] . ' ' . L10n::t('bytes');
3611
3612                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3613                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3614                 }
3615
3616                 if ($as != '') {
3617                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3618                 }
3619
3620                 // Map.
3621                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3622                         $x = Map::byCoordinates(trim($item['coord']));
3623                         if ($x) {
3624                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3625                         }
3626                 }
3627
3628                 // Replace friendica image url size with theme preference.
3629                 if (!empty($a->theme_info['item_image_size'])) {
3630                         $ps = $a->theme_info['item_image_size'];
3631                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3632                 }
3633
3634                 $s = HTML::applyContentFilter($s, $filter_reasons);
3635
3636                 $hook_data = ['item' => $item, 'html' => $s];
3637                 Hook::callAll('prepare_body_final', $hook_data);
3638
3639                 return $hook_data['html'];
3640         }
3641
3642         /**
3643          * get private link for item
3644          *
3645          * @param array $item
3646          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3647          * @throws \Exception
3648          */
3649         public static function getPlink($item)
3650         {
3651                 $a = DI::app();
3652
3653                 if ($a->user['nickname'] != "") {
3654                         $ret = [
3655                                 'href' => "display/" . $item['guid'],
3656                                 'orig' => "display/" . $item['guid'],
3657                                 'title' => L10n::t('View on separate page'),
3658                                 'orig_title' => L10n::t('view on separate page'),
3659                         ];
3660
3661                         if (!empty($item['plink'])) {
3662                                 $ret["href"] = $a->removeBaseURL($item['plink']);
3663                                 $ret["title"] = L10n::t('link to source');
3664                         }
3665
3666                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3667                         $ret = [
3668                                 'href' => $item['plink'],
3669                                 'orig' => $item['plink'],
3670                                 'title' => L10n::t('link to source'),
3671                         ];
3672                 } else {
3673                         $ret = [];
3674                 }
3675
3676                 return $ret;
3677         }
3678
3679         /**
3680          * Is the given item array a post that is sent as starting post to a forum?
3681          *
3682          * @param array $item
3683          * @param array $owner
3684          *
3685          * @return boolean "true" when it is a forum post
3686          */
3687         public static function isForumPost(array $item, array $owner = [])
3688         {
3689                 if (empty($owner)) {
3690                         $owner = User::getOwnerDataById($item['uid']);
3691                         if (empty($owner)) {
3692                                 return false;
3693                         }
3694                 }
3695
3696                 if (($item['author-id'] == $item['owner-id']) ||
3697                         ($owner['id'] == $item['contact-id']) ||
3698                         ($item['uri'] != $item['parent-uri']) ||
3699                         $item['origin']) {
3700                         return false;
3701                 }
3702
3703                 return Contact::isForum($item['contact-id']);
3704         }
3705
3706         /**
3707          * Search item id for given URI or plink
3708          *
3709          * @param string $uri
3710          * @param integer $uid
3711          *
3712          * @return integer item id
3713          */
3714         public static function searchByLink($uri, $uid = 0)
3715         {
3716                 $ssl_uri = str_replace('http://', 'https://', $uri);
3717                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3718
3719                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3720                 if (DBA::isResult($item)) {
3721                         return $item['id'];
3722                 }
3723
3724                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3725                 if (!DBA::isResult($itemcontent)) {
3726                         return 0;
3727                 }
3728
3729                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3730                 if (!DBA::isResult($itemuri)) {
3731                         return 0;
3732                 }
3733
3734                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3735                 if (DBA::isResult($item)) {
3736                         return $item['id'];
3737                 }
3738
3739                 return 0;
3740         }
3741
3742         /**
3743          * Fetches item for given URI or plink
3744          *
3745          * @param string $uri
3746          * @param integer $uid
3747          *
3748          * @return integer item id
3749          */
3750         public static function fetchByLink($uri, $uid = 0)
3751         {
3752                 $item_id = self::searchByLink($uri, $uid);
3753                 if (!empty($item_id)) {
3754                         return $item_id;
3755                 }
3756
3757                 if (ActivityPub\Processor::fetchMissingActivity($uri)) {
3758                         $item_id = self::searchByLink($uri, $uid);
3759                 } else {
3760                         $item_id = Diaspora::fetchByURL($uri);
3761                 }
3762
3763                 if (!empty($item_id)) {
3764                         return $item_id;
3765                 }
3766
3767                 return 0;
3768         }
3769
3770         /**
3771          * Return share data from an item array (if the item is shared item)
3772          * We are providing the complete Item array, because at some time in the future
3773          * we hopefully will define these values not in the body anymore but in some item fields.
3774          * This function is meant to replace all similar functions in the system.
3775          *
3776          * @param array $item
3777          *
3778          * @return array with share information
3779          */
3780         public static function getShareArray($item)
3781         {
3782                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3783                         return [];
3784                 }
3785
3786                 $attribute_string = $matches[2];
3787                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3788                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3789                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3790                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3791                         }
3792                 }
3793                 return $attributes;
3794         }
3795
3796         /**
3797          * Fetch item information for shared items from the original items and adds it.
3798          *
3799          * @param array $item
3800          *
3801          * @return array item array with data from the original item
3802          */
3803         public static function addShareDataFromOriginal($item)
3804         {
3805                 $shared = self::getShareArray($item);
3806                 if (empty($shared)) {
3807                         return $item;
3808                 }
3809
3810                 // Real reshares always have got a GUID.
3811                 if (empty($shared['guid'])) {
3812                         return $item;
3813                 }
3814
3815                 $uid = $item['uid'] ?? 0;
3816
3817                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3818                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3819                 if (!DBA::isResult($shared_item)) {
3820                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3821                         $id = self::fetchByLink($shared['link'], $uid);
3822                         if (empty($id)) {
3823                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3824                                 return $item;
3825                         }
3826
3827                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3828                         if (!DBA::isResult($shared_item)) {
3829                                 return $item;
3830                         }
3831                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3832                 } else {
3833                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3834                 }
3835
3836                 if (!empty($shared_item['title'])) {
3837                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3838                         unset($shared_item['title']);
3839                 } else {
3840                         $body = $shared_item['body'];
3841                 }
3842
3843                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3844                 unset($shared_item['body']);
3845
3846                 return array_merge($item, $shared_item);
3847         }
3848 }