src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Core\Worker;
  33 use Friendica\Database\DBA;
  34 use Friendica\DI;
  35 use Friendica\Protocol\Activity;
  36 use Friendica\Protocol\ActivityPub;
  37 use Friendica\Protocol\Diaspora;
  38 use Friendica\Protocol\OStatus;
  39 use Friendica\Util\DateTimeFormat;
  40 use Friendica\Util\Map;
  41 use Friendica\Util\Network;
  42 use Friendica\Util\Security;
  43 use Friendica\Util\Strings;
  44 use Friendica\Util\XML;
  45 use Friendica\Worker\Delivery;
  46 use Text_LanguageDetect;
  47 use Friendica\Repository\PermissionSet as RepPermissionSet;
  48
  49 class Item
  50 {
  51         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  52         const PT_ARTICLE = 0;
  53         const PT_NOTE = 1;
  54         const PT_PAGE = 2;
  55         const PT_IMAGE = 16;
  56         const PT_AUDIO = 17;
  57         const PT_VIDEO = 18;
  58         const PT_DOCUMENT = 19;
  59         const PT_EVENT = 32;
  60         const PT_PERSONAL_NOTE = 128;
  61
  62         // Field list that is used to display the items
  63         const DISPLAY_FIELDLIST = [
  64                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  65                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  66                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  67                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  68                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  69                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  70                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  71                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  72                 'writable', 'self', 'cid', 'alias', 'pinned',
  73                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  74                 'event-summary', 'event-desc', 'event-location', 'event-type',
  75                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  76                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  77         ];
  78
  79         // Field list that is used to deliver items via the protocols
  80         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  81                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  82                         'private', 'title', 'body', 'location', 'coord', 'app',
  83                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  84                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  85                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  86                         'signed_text', 'signature', 'signer', 'network'];
  87
  88         // Field list for "item-content" table that is mixed with the item table
  89         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  90                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  91                         'object-type', 'object', 'target-type', 'target', 'plink'];
  92
  93         // Field list for "item-content" table that is not present in the "item" table
  94         const CONTENT_FIELDLIST = ['language'];
  95
  96         // All fields in the item table
  97         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  98                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  99                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 100                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
 101                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 102                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 103                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 104                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 105                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 106                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 107                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
 108
 109         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 110         // The item-activity table only stores the index and needs this array to know the matching activity.
 111         const ACTIVITIES = [
 112                 Activity::LIKE, Activity::DISLIKE,
 113                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 114                 Activity::FOLLOW,
 115                 Activity::ANNOUNCE];
 116
 117         const PUBLIC = 0;
 118         const PRIVATE = 1;
 119         const UNLISTED = 2;
 120
 121         private static $legacy_mode = null;
 122
 123         public static function isLegacyMode()
 124         {
 125                 if (is_null(self::$legacy_mode)) {
 126                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 127                 }
 128
 129                 return self::$legacy_mode;
 130         }
 131
 132         /**
 133          * Set the pinned state of an item
 134          *
 135          * @param integer $iid    Item ID
 136          * @param integer $uid    User ID
 137          * @param boolean $pinned Pinned state
 138          */
 139         public static function setPinned(int $iid, int $uid, bool $pinned)
 140         {
 141                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 142         }
 143
 144         /**
 145          * Get the pinned state
 146          *
 147          * @param integer $iid Item ID
 148          * @param integer $uid User ID
 149          *
 150          * @return boolean pinned state
 151          */
 152         public static function getPinned(int $iid, int $uid)
 153         {
 154                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 155                 if (!DBA::isResult($useritem)) {
 156                         return false;
 157                 }
 158                 return (bool)$useritem['pinned'];
 159         }
 160
 161         /**
 162          * Select pinned rows from the item table for a given user
 163          *
 164          * @param integer $uid       User ID
 165          * @param array   $selected  Array of selected fields, empty for all
 166          * @param array   $condition Array of fields for condition
 167          * @param array   $params    Array of several parameters
 168          *
 169          * @return boolean|object
 170          * @throws \Exception
 171          */
 172         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 173         {
 174                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 175                 if (!DBA::isResult($useritems)) {
 176                         return $useritems;
 177                 }
 178
 179                 $pinned = [];
 180                 while ($useritem = DBA::fetch($useritems)) {
 181                         $pinned[] = $useritem['iid'];
 182                 }
 183                 DBA::close($useritems);
 184
 185                 if (empty($pinned)) {
 186                         return [];
 187                 }
 188
 189                 if (empty($condition) || !is_array($condition)) {
 190                         $condition = ['iid' => $pinned];
 191                 } else {
 192                         reset($condition);
 193                         $first_key = key($condition);
 194                         if (!is_int($first_key)) {
 195                                 $condition['iid'] = $pinned;
 196                         } else {
 197                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 198                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 199                                 $condition = array_merge($condition, $pinned);
 200                         }
 201                 }
 202
 203                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 204         }
 205
 206         /**
 207          * returns an activity index from an activity string
 208          *
 209          * @param string $activity activity string
 210          * @return integer Activity index
 211          */
 212         public static function activityToIndex($activity)
 213         {
 214                 $index = array_search($activity, self::ACTIVITIES);
 215
 216                 if (is_bool($index)) {
 217                         $index = -1;
 218                 }
 219
 220                 return $index;
 221         }
 222
 223         /**
 224          * returns an activity string from an activity index
 225          *
 226          * @param integer $index activity index
 227          * @return string Activity string
 228          */
 229         private static function indexToActivity($index)
 230         {
 231                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 232                         return '';
 233                 }
 234
 235                 return self::ACTIVITIES[$index];
 236         }
 237
 238         /**
 239          * Fetch a single item row
 240          *
 241          * @param mixed $stmt statement object
 242          * @return array current row
 243          */
 244         public static function fetch($stmt)
 245         {
 246                 $row = DBA::fetch($stmt);
 247
 248                 if (is_bool($row)) {
 249                         return $row;
 250                 }
 251
 252                 // ---------------------- Transform item structure data ----------------------
 253
 254                 // We prefer the data from the user's contact over the public one
 255                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 256                         ($row['author-link'] == $row['contact-link'])) {
 257                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 258                                 $row['author-avatar'] = $row['contact-avatar'];
 259                         }
 260                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 261                                 $row['author-name'] = $row['contact-name'];
 262                         }
 263                 }
 264
 265                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 266                         ($row['owner-link'] == $row['contact-link'])) {
 267                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 268                                 $row['owner-avatar'] = $row['contact-avatar'];
 269                         }
 270                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 271                                 $row['owner-name'] = $row['contact-name'];
 272                         }
 273                 }
 274
 275                 // We can always comment on posts from these networks
 276                 if (array_key_exists('writable', $row) &&
 277                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 278                         $row['writable'] = true;
 279                 }
 280
 281                 // ---------------------- Transform item content data ----------------------
 282
 283                 // Fetch data from the item-content table whenever there is content there
 284                 if (self::isLegacyMode()) {
 285                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 286                         foreach ($legacy_fields as $field) {
 287                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 288                                         $row[$field] = $row['internal-item-' . $field];
 289                                 }
 290                                 unset($row['internal-item-' . $field]);
 291                         }
 292                 }
 293
 294                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 295                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 296                         if (array_key_exists('title', $row)) {
 297                                 $row['title'] = '';
 298                         }
 299                         if (array_key_exists('body', $row)) {
 300                                 $row['body'] = $row['verb'];
 301                         }
 302                         if (array_key_exists('object', $row)) {
 303                                 $row['object'] = '';
 304                         }
 305                         if (array_key_exists('object-type', $row)) {
 306                                 $row['object-type'] = Activity\ObjectType::NOTE;
 307                         }
 308                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 309                         // Posts don't have a target - but having tags or files.
 310                         // We safe some performance by building tag and file strings only here.
 311                         // We remove the target since they aren't used for this type.
 312                         // In mail posts we do store some mail header data in the object.
 313                         if (array_key_exists('target', $row)) {
 314                                 $row['target'] = '';
 315                         }
 316                 }
 317
 318                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 319                         // Build the tag string out of the term entries
 320                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 321                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 322                         }
 323
 324                         // Build the file string out of the term entries
 325                         if (array_key_exists('file', $row) && empty($row['file'])) {
 326                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 327                         }
 328                 }
 329
 330                 if ($row['internal-psid'] == RepPermissionSet::PUBLIC) {
 331                         if (array_key_exists('allow_cid', $row)) {
 332                                 $row['allow_cid'] = '';
 333                         }
 334                         if (array_key_exists('allow_gid', $row)) {
 335                                 $row['allow_gid'] = '';
 336                         }
 337                         if (array_key_exists('deny_cid', $row)) {
 338                                 $row['deny_cid'] = '';
 339                         }
 340                         if (array_key_exists('deny_gid', $row)) {
 341                                 $row['deny_gid'] = '';
 342                         }
 343                 }
 344
 345                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 346                         $row['ignored'] = $row['internal-user-ignored'];
 347                 }
 348
 349                 // Remove internal fields
 350                 unset($row['internal-activity']);
 351                 unset($row['internal-network']);
 352                 unset($row['internal-iid']);
 353                 unset($row['internal-psid']);
 354                 unset($row['internal-iaid']);
 355                 unset($row['internal-user-ignored']);
 356                 unset($row['interaction']);
 357
 358                 return $row;
 359         }
 360
 361         /**
 362          * Fills an array with data from an item query
 363          *
 364          * @param object $stmt statement object
 365          * @param bool   $do_close
 366          * @return array Data array
 367          */
 368         public static function inArray($stmt, $do_close = true) {
 369                 if (is_bool($stmt)) {
 370                         return $stmt;
 371                 }
 372
 373                 $data = [];
 374                 while ($row = self::fetch($stmt)) {
 375                         $data[] = $row;
 376                 }
 377                 if ($do_close) {
 378                         DBA::close($stmt);
 379                 }
 380                 return $data;
 381         }
 382
 383         /**
 384          * Check if item data exists
 385          *
 386          * @param array $condition array of fields for condition
 387          *
 388          * @return boolean Are there rows for that condition?
 389          * @throws \Exception
 390          */
 391         public static function exists($condition) {
 392                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 393
 394                 if (is_bool($stmt)) {
 395                         $retval = $stmt;
 396                 } else {
 397                         $retval = (DBA::numRows($stmt) > 0);
 398                 }
 399
 400                 DBA::close($stmt);
 401
 402                 return $retval;
 403         }
 404
 405         /**
 406          * Retrieve a single record from the item table for a given user and returns it in an associative array
 407          *
 408          * @param integer $uid User ID
 409          * @param array   $selected
 410          * @param array   $condition
 411          * @param array   $params
 412          * @return bool|array
 413          * @throws \Exception
 414          * @see   DBA::select
 415          */
 416         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 417         {
 418                 $params['uid'] = $uid;
 419
 420                 if (empty($selected)) {
 421                         $selected = Item::DISPLAY_FIELDLIST;
 422                 }
 423
 424                 return self::selectFirst($selected, $condition, $params);
 425         }
 426
 427         /**
 428          * Select rows from the item table for a given user
 429          *
 430          * @param integer $uid       User ID
 431          * @param array   $selected  Array of selected fields, empty for all
 432          * @param array   $condition Array of fields for condition
 433          * @param array   $params    Array of several parameters
 434          *
 435          * @return boolean|object
 436          * @throws \Exception
 437          */
 438         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 439         {
 440                 $params['uid'] = $uid;
 441
 442                 if (empty($selected)) {
 443                         $selected = Item::DISPLAY_FIELDLIST;
 444                 }
 445
 446                 return self::select($selected, $condition, $params);
 447         }
 448
 449         /**
 450          * Retrieve a single record from the item table and returns it in an associative array
 451          *
 452          * @param array $fields
 453          * @param array $condition
 454          * @param array $params
 455          * @return bool|array
 456          * @throws \Exception
 457          * @see   DBA::select
 458          */
 459         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 460         {
 461                 $params['limit'] = 1;
 462
 463                 $result = self::select($fields, $condition, $params);
 464
 465                 if (is_bool($result)) {
 466                         return $result;
 467                 } else {
 468                         $row = self::fetch($result);
 469                         DBA::close($result);
 470                         return $row;
 471                 }
 472         }
 473
 474         /**
 475          * Select rows from the item table and returns them as an array
 476          *
 477          * @param array $selected  Array of selected fields, empty for all
 478          * @param array $condition Array of fields for condition
 479          * @param array $params    Array of several parameters
 480          *
 481          * @return array
 482          * @throws \Exception
 483          */
 484         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 485         {
 486                 $result = self::select($fields, $condition, $params);
 487
 488                 if (is_bool($result)) {
 489                         return [];
 490                 }
 491
 492                 $data = [];
 493                 while ($row = self::fetch($result)) {
 494                         $data[] = $row;
 495                 }
 496                 DBA::close($result);
 497
 498                 return $data;
 499         }
 500
 501         /**
 502          * Select rows from the item table
 503          *
 504          * @param array $selected  Array of selected fields, empty for all
 505          * @param array $condition Array of fields for condition
 506          * @param array $params    Array of several parameters
 507          *
 508          * @return boolean|object
 509          * @throws \Exception
 510          */
 511         public static function select(array $selected = [], array $condition = [], $params = [])
 512         {
 513                 $uid = 0;
 514                 $usermode = false;
 515
 516                 if (isset($params['uid'])) {
 517                         $uid = $params['uid'];
 518                         $usermode = true;
 519                 }
 520
 521                 $fields = self::fieldlist($usermode);
 522
 523                 $select_fields = self::constructSelectFields($fields, $selected);
 524
 525                 $condition_string = DBA::buildCondition($condition);
 526
 527                 $condition_string = self::addTablesToFields($condition_string, $fields);
 528
 529                 if ($usermode) {
 530                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 531                 }
 532
 533                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 534
 535                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 536
 537                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 538
 539                 return DBA::p($sql, $condition);
 540         }
 541
 542         /**
 543          * Select rows from the starting post in the item table
 544          *
 545          * @param integer $uid       User ID
 546          * @param array   $selected
 547          * @param array   $condition Array of fields for condition
 548          * @param array   $params    Array of several parameters
 549          *
 550          * @return boolean|object
 551          * @throws \Exception
 552          */
 553         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 554         {
 555                 $params['uid'] = $uid;
 556
 557                 if (empty($selected)) {
 558                         $selected = Item::DISPLAY_FIELDLIST;
 559                 }
 560
 561                 return self::selectThread($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          * @param integer $uid User ID
 568          * @param array   $selected
 569          * @param array   $condition
 570          * @param array   $params
 571          * @return bool|array
 572          * @throws \Exception
 573          * @see   DBA::select
 574          */
 575         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 576         {
 577                 $params['uid'] = $uid;
 578
 579                 if (empty($selected)) {
 580                         $selected = Item::DISPLAY_FIELDLIST;
 581                 }
 582
 583                 return self::selectFirstThread($selected, $condition, $params);
 584         }
 585
 586         /**
 587          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 588          *
 589          * @param array $fields
 590          * @param array $condition
 591          * @param array $params
 592          * @return bool|array
 593          * @throws \Exception
 594          * @see   DBA::select
 595          */
 596         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 597         {
 598                 $params['limit'] = 1;
 599                 $result = self::selectThread($fields, $condition, $params);
 600
 601                 if (is_bool($result)) {
 602                         return $result;
 603                 } else {
 604                         $row = self::fetch($result);
 605                         DBA::close($result);
 606                         return $row;
 607                 }
 608         }
 609
 610         /**
 611          * Select rows from the starting post in the item table
 612          *
 613          * @param array $selected  Array of selected fields, empty for all
 614          * @param array $condition Array of fields for condition
 615          * @param array $params    Array of several parameters
 616          *
 617          * @return boolean|object
 618          * @throws \Exception
 619          */
 620         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 621         {
 622                 $uid = 0;
 623                 $usermode = false;
 624
 625                 if (isset($params['uid'])) {
 626                         $uid = $params['uid'];
 627                         $usermode = true;
 628                 }
 629
 630                 $fields = self::fieldlist($usermode);
 631
 632                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 633
 634                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 635                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 636                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 637                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 638
 639                 $select_fields = self::constructSelectFields($fields, $selected);
 640
 641                 $condition_string = DBA::buildCondition($condition);
 642
 643                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 644                 $condition_string = self::addTablesToFields($condition_string, $fields);
 645
 646                 if ($usermode) {
 647                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 648                 }
 649
 650                 $param_string = DBA::buildParameter($params);
 651                 $param_string = self::addTablesToFields($param_string, $threadfields);
 652                 $param_string = self::addTablesToFields($param_string, $fields);
 653
 654                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 655
 656                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 657
 658                 return DBA::p($sql, $condition);
 659         }
 660
 661         /**
 662          * Returns a list of fields that are associated with the item table
 663          *
 664          * @param $usermode
 665          * @return array field list
 666          */
 667         private static function fieldlist($usermode)
 668         {
 669                 $fields = [];
 670
 671                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 672                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id',
 673                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 674                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 675                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 676                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 677                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 678                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 679                         'network' => 'internal-network', 'iaid' => 'internal-iaid', 'psid' => 'internal-psid'];
 680
 681                 if ($usermode) {
 682                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 683                 }
 684
 685                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 686
 687                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 688
 689                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 690
 691                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 692
 693                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 694                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 695
 696                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 697                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 698
 699                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 700                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 701                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 702
 703                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 704
 705                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 706
 707                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 708                         'start' => 'event-start','finish' => 'event-finish',
 709                         'summary' => 'event-summary','desc' => 'event-desc',
 710                         'location' => 'event-location', 'type' => 'event-type',
 711                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 712                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 713
 714                 $fields['diaspora-interaction'] = ['interaction', 'interaction' => 'signed_text'];
 715
 716                 return $fields;
 717         }
 718
 719         /**
 720          * Returns SQL condition for the "select" functions
 721          *
 722          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 723          *
 724          * @return string SQL condition
 725          */
 726         private static function condition($thread_mode)
 727         {
 728                 if ($thread_mode) {
 729                         $master_table = "`thread`";
 730                 } else {
 731                         $master_table = "`item`";
 732                 }
 733                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 734                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 735                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 736                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 737                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 738                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 739                         GRAVITY_PARENT, GRAVITY_PARENT);
 740         }
 741
 742         /**
 743          * Returns all needed "JOIN" commands for the "select" functions
 744          *
 745          * @param integer $uid          User ID
 746          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 747          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 748          *
 749          * @param         $user_mode
 750          * @return string The SQL joins for the "select" functions
 751          */
 752         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 753         {
 754                 if ($thread_mode) {
 755                         $master_table = "`thread`";
 756                         $master_table_key = "`thread`.`iid`";
 757                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 758                 } else {
 759                         $master_table = "`item`";
 760                         $master_table_key = "`item`.`id`";
 761                         $joins = '';
 762                 }
 763
 764                 if ($user_mode) {
 765                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 766                                 AND NOT `contact`.`blocked`
 767                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 768                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 769                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 770                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 771                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 772                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 773                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 774                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 775                 } else {
 776                         if (strpos($sql_commands, "`contact`.") !== false) {
 777                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 778                         }
 779                         if (strpos($sql_commands, "`author`.") !== false) {
 780                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 781                         }
 782                         if (strpos($sql_commands, "`owner`.") !== false) {
 783                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 784                         }
 785                 }
 786
 787                 if (strpos($sql_commands, "`group_member`.") !== false) {
 788                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 789                 }
 790
 791                 if (strpos($sql_commands, "`user`.") !== false) {
 792                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 793                 }
 794
 795                 if (strpos($sql_commands, "`event`.") !== false) {
 796                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 797                 }
 798
 799                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 800                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 801                 }
 802
 803                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 804                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 805                 }
 806
 807                 if (strpos($sql_commands, "`item-content`.") !== false) {
 808                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 809                 }
 810
 811                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 812                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 813                 }
 814
 815                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 816                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 817                 }
 818
 819                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 820                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 821                 }
 822
 823                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 824                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 825                 }
 826
 827                 return $joins;
 828         }
 829
 830         /**
 831          * Add the field list for the "select" functions
 832          *
 833          * @param array $fields The field definition array
 834          * @param array $selected The array with the selected fields from the "select" functions
 835          *
 836          * @return string The field list
 837          */
 838         private static function constructSelectFields(array $fields, array $selected)
 839         {
 840                 if (!empty($selected)) {
 841                         $selected = array_merge($selected, ['internal-iid', 'internal-psid', 'internal-iaid', 'internal-network']);
 842                 }
 843
 844                 if (in_array('verb', $selected)) {
 845                         $selected[] = 'internal-activity';
 846                 }
 847
 848                 if (in_array('ignored', $selected)) {
 849                         $selected[] = 'internal-user-ignored';
 850                 }
 851
 852                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 853
 854                 $selection = [];
 855                 foreach ($fields as $table => $table_fields) {
 856                         foreach ($table_fields as $field => $select) {
 857                                 if (empty($selected) || in_array($select, $selected)) {
 858                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 859                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 860                                         }
 861                                         if (is_int($field)) {
 862                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 863                                         } else {
 864                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 865                                         }
 866                                 }
 867                         }
 868                 }
 869                 return implode(", ", $selection);
 870         }
 871
 872         /**
 873          * add table definition to fields in an SQL query
 874          *
 875          * @param string $query SQL query
 876          * @param array $fields The field definition array
 877          *
 878          * @return string the changed SQL query
 879          */
 880         private static function addTablesToFields($query, $fields)
 881         {
 882                 foreach ($fields as $table => $table_fields) {
 883                         foreach ($table_fields as $alias => $field) {
 884                                 if (is_int($alias)) {
 885                                         $replace_field = $field;
 886                                 } else {
 887                                         $replace_field = $alias;
 888                                 }
 889
 890                                 $search = "/([^\.])`" . $field . "`/i";
 891                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 892                                 $query = preg_replace($search, $replace, $query);
 893                         }
 894                 }
 895                 return $query;
 896         }
 897
 898         /**
 899          * Update existing item entries
 900          *
 901          * @param array $fields    The fields that are to be changed
 902          * @param array $condition The condition for finding the item entries
 903          *
 904          * In the future we may have to change permissions as well.
 905          * Then we had to add the user id as third parameter.
 906          *
 907          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 908          *
 909          * @return integer|boolean number of affected rows - or "false" if there was an error
 910          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 911          */
 912         public static function update(array $fields, array $condition)
 913         {
 914                 if (empty($condition) || empty($fields)) {
 915                         return false;
 916                 }
 917
 918                 // To ensure the data integrity we do it in an transaction
 919                 DBA::transaction();
 920
 921                 // We cannot simply expand the condition to check for origin entries
 922                 // The condition needn't to be a simple array but could be a complex condition.
 923                 // And we have to execute this query before the update to ensure to fetch the same data.
 924                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 925
 926                 $content_fields = [];
 927                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 928                         if (isset($fields[$field])) {
 929                                 $content_fields[$field] = $fields[$field];
 930                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 931                                         unset($fields[$field]);
 932                                 } else {
 933                                         $fields[$field] = null;
 934                                 }
 935                         }
 936                 }
 937
 938                 $delivery_data = ItemDeliveryData::extractFields($fields);
 939
 940                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 941                 foreach ($clear_fields as $field) {
 942                         if (array_key_exists($field, $fields)) {
 943                                 $fields[$field] = null;
 944                         }
 945                 }
 946
 947                 if (array_key_exists('tag', $fields)) {
 948                         $tags = $fields['tag'];
 949                         $fields['tag'] = null;
 950                 } else {
 951                         $tags = null;
 952                 }
 953
 954                 if (array_key_exists('file', $fields)) {
 955                         $files = $fields['file'];
 956                         $fields['file'] = null;
 957                 } else {
 958                         $files = null;
 959                 }
 960
 961                 if (!empty($fields)) {
 962                         $success = DBA::update('item', $fields, $condition);
 963
 964                         if (!$success) {
 965                                 DBA::close($items);
 966                                 DBA::rollback();
 967                                 return false;
 968                         }
 969                 }
 970
 971                 // When there is no content for the "old" item table, this will count the fetched items
 972                 $rows = DBA::affectedRows();
 973
 974                 $notify_items = [];
 975
 976                 while ($item = DBA::fetch($items)) {
 977                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 978                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 979
 980                                 if (empty($item['iaid'])) {
 981                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 982                                         if (DBA::isResult($item_activity)) {
 983                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 984                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 985                                                         if (self::isLegacyMode()) {
 986                                                                 $item_fields[$field] = null;
 987                                                         } else {
 988                                                                 unset($item_fields[$field]);
 989                                                         }
 990                                                 }
 991                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 992
 993                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 994                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 995                                                 }
 996                                         }
 997                                 } elseif (!empty($item['icid'])) {
 998                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 999
1000                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
1001                                                 DBA::delete('item-content', ['id' => $item['icid']]);
1002                                         }
1003                                 }
1004                         } else {
1005                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
1006
1007                                 if (empty($item['icid'])) {
1008                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
1009                                         if (DBA::isResult($item_content)) {
1010                                                 $item_fields = ['icid' => $item_content['id']];
1011                                                 // Clear all fields in the item table that have a content in the item-content table
1012                                                 foreach ($item_content as $field => $content) {
1013                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1014                                                                 if (self::isLegacyMode()) {
1015                                                                         $item_fields[$field] = null;
1016                                                                 } else {
1017                                                                         unset($item_fields[$field]);
1018                                                                 }
1019                                                         }
1020                                                 }
1021                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1022                                         }
1023                                 }
1024                         }
1025
1026                         if (!is_null($tags)) {
1027                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1028                                 if (!empty($item['tag'])) {
1029                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1030                                 }
1031                         }
1032
1033                         if (!is_null($files)) {
1034                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1035                                 if (!empty($item['file'])) {
1036                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1037                                 }
1038                         }
1039
1040                         ItemDeliveryData::update($item['id'], $delivery_data);
1041
1042                         self::updateThread($item['id']);
1043
1044                         // We only need to notfiy others when it is an original entry from us.
1045                         // Only call the notifier when the item has some content relevant change.
1046                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1047                                 $notify_items[] = $item['id'];
1048                         }
1049                 }
1050
1051                 DBA::close($items);
1052                 DBA::commit();
1053
1054                 foreach ($notify_items as $notify_item) {
1055                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1056                 }
1057
1058                 return $rows;
1059         }
1060
1061         /**
1062          * Delete an item and notify others about it - if it was ours
1063          *
1064          * @param array   $condition The condition for finding the item entries
1065          * @param integer $priority  Priority for the notification
1066          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1067          */
1068         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
1069         {
1070                 $items = self::select(['id'], $condition);
1071                 while ($item = self::fetch($items)) {
1072                         self::markForDeletionById($item['id'], $priority);
1073                 }
1074                 DBA::close($items);
1075         }
1076
1077         /**
1078          * Delete an item for an user and notify others about it - if it was ours
1079          *
1080          * @param array   $condition The condition for finding the item entries
1081          * @param integer $uid       User who wants to delete this item
1082          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1083          */
1084         public static function deleteForUser($condition, $uid)
1085         {
1086                 if ($uid == 0) {
1087                         return;
1088                 }
1089
1090                 $items = self::select(['id', 'uid'], $condition);
1091                 while ($item = self::fetch($items)) {
1092                         // "Deleting" global items just means hiding them
1093                         if ($item['uid'] == 0) {
1094                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1095
1096                                 // Delete notifications
1097                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1098                         } elseif ($item['uid'] == $uid) {
1099                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
1100                         } else {
1101                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1102                         }
1103                 }
1104                 DBA::close($items);
1105         }
1106
1107         /**
1108          * Mark an item for deletion, delete related data and notify others about it - if it was ours
1109          *
1110          * @param integer $item_id
1111          * @param integer $priority Priority for the notification
1112          *
1113          * @return boolean success
1114          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1115          */
1116         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
1117         {
1118                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
1119                 // locate item to be deleted
1120                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1121                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1122                         'verb', 'object-type', 'object', 'target', 'contact-id',
1123                         'icid', 'iaid', 'psid'];
1124                 $item = self::selectFirst($fields, ['id' => $item_id]);
1125                 if (!DBA::isResult($item)) {
1126                         Logger::info('Item not found.', ['id' => $item_id]);
1127                         return false;
1128                 }
1129
1130                 if ($item['deleted']) {
1131                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1132                         return false;
1133                 }
1134
1135                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1136                 if (!DBA::isResult($parent)) {
1137                         $parent = ['origin' => false];
1138                 }
1139
1140                 // clean up categories and tags so they don't end up as orphans
1141
1142                 $matches = false;
1143                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1144
1145                 if ($cnt) {
1146                         foreach ($matches as $mtch) {
1147                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1148                         }
1149                 }
1150
1151                 $matches = false;
1152
1153                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1154
1155                 if ($cnt) {
1156                         foreach ($matches as $mtch) {
1157                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1158                         }
1159                 }
1160
1161                 /*
1162                  * If item is a link to a photo resource, nuke all the associated photos
1163                  * (visitors will not have photo resources)
1164                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1165                  * generate a resource-id and therefore aren't intimately linked to the item.
1166                  */
1167                 /// @TODO: this should first check if photo is used elsewhere
1168                 if (strlen($item['resource-id'])) {
1169                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1170                 }
1171
1172                 // If item is a link to an event, delete the event.
1173                 if (intval($item['event-id'])) {
1174                         Event::delete($item['event-id']);
1175                 }
1176
1177                 // If item has attachments, drop them
1178                 /// @TODO: this should first check if attachment is used elsewhere
1179                 foreach (explode(",", $item['attach']) as $attach) {
1180                         preg_match("|attach/(\d+)|", $attach, $matches);
1181                         if (is_array($matches) && count($matches) > 1) {
1182                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1183                         }
1184                 }
1185
1186                 // Delete tags that had been attached to other items
1187                 self::deleteTagsFromItem($item);
1188
1189                 // Delete notifications
1190                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1191
1192                 // Set the item to "deleted"
1193                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1194                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1195
1196                 Term::insertFromTagFieldByItemId($item['id'], '');
1197                 Term::insertFromFileFieldByItemId($item['id'], '');
1198                 self::deleteThread($item['id'], $item['parent-uri']);
1199
1200                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1201                         self::markForDeletion(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1202                 }
1203
1204                 ItemDeliveryData::delete($item['id']);
1205
1206                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1207
1208                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1209                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1210                 }
1211                 // When the permission set will be used in photo and events as well,
1212                 // this query here needs to be extended.
1213                 // @todo Currently deactivated. We need the permission set in the deletion process.
1214                 // This is a reminder to add the removal somewhere else.
1215                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1216                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1217                 //}
1218
1219                 // If it's the parent of a comment thread, kill all the kids
1220                 if ($item['id'] == $item['parent']) {
1221                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1222                 }
1223
1224                 // Is it our comment and/or our thread?
1225                 if ($item['origin'] || $parent['origin']) {
1226                         // When we delete the original post we will delete all existing copies on the server as well
1227                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1228
1229                         // send the notification upstream/downstream
1230                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1231                 } elseif ($item['uid'] != 0) {
1232
1233                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1234                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1235                         if (DBA::isResult($global_item)) {
1236                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1237                         }
1238                 }
1239
1240                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1241
1242                 return true;
1243         }
1244
1245         private static function deleteTagsFromItem($item)
1246         {
1247                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1248                         return;
1249                 }
1250
1251                 $xo = XML::parseString($item["object"], false);
1252                 $xt = XML::parseString($item["target"], false);
1253
1254                 if ($xt->type != Activity\ObjectType::NOTE) {
1255                         return;
1256                 }
1257
1258                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1259                 if (!DBA::isResult($i)) {
1260                         return;
1261                 }
1262
1263                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1264                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1265                 $author_copy = $item["origin"];
1266
1267                 if (($owner_remove && $author_copy) || !$owner_remove) {
1268                         return;
1269                 }
1270
1271                 $tags = explode(',', $i["tag"]);
1272                 $newtags = [];
1273                 if (count($tags)) {
1274                         foreach ($tags as $tag) {
1275                                 if (trim($tag) !== trim($xo->body)) {
1276                                        $newtags[] = trim($tag);
1277                                 }
1278                         }
1279                 }
1280                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1281         }
1282
1283         private static function guid($item, $notify)
1284         {
1285                 if (!empty($item['guid'])) {
1286                         return Strings::escapeTags(trim($item['guid']));
1287                 }
1288
1289                 if ($notify) {
1290                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1291                         // We add the hash of our own host because our host is the original creator of the post.
1292                         $prefix_host = DI::baseUrl()->getHostname();
1293                 } else {
1294                         $prefix_host = '';
1295
1296                         // We are only storing the post so we create a GUID from the original hostname.
1297                         if (!empty($item['author-link'])) {
1298                                 $parsed = parse_url($item['author-link']);
1299                                 if (!empty($parsed['host'])) {
1300                                         $prefix_host = $parsed['host'];
1301                                 }
1302                         }
1303
1304                         if (empty($prefix_host) && !empty($item['plink'])) {
1305                                 $parsed = parse_url($item['plink']);
1306                                 if (!empty($parsed['host'])) {
1307                                         $prefix_host = $parsed['host'];
1308                                 }
1309                         }
1310
1311                         if (empty($prefix_host) && !empty($item['uri'])) {
1312                                 $parsed = parse_url($item['uri']);
1313                                 if (!empty($parsed['host'])) {
1314                                         $prefix_host = $parsed['host'];
1315                                 }
1316                         }
1317
1318                         // Is it in the format data@host.tld? - Used for mail contacts
1319                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1320                                 $mailparts = explode('@', $item['author-link']);
1321                                 $prefix_host = array_pop($mailparts);
1322                         }
1323                 }
1324
1325                 if (!empty($item['plink'])) {
1326                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1327                 } elseif (!empty($item['uri'])) {
1328                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1329                 } else {
1330                         $guid = System::createUUID(hash('crc32', $prefix_host));
1331                 }
1332
1333                 return $guid;
1334         }
1335
1336         private static function contactId($item)
1337         {
1338                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1339                         return $item['contact-id'];
1340                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1341                         return $item['contact-id'];
1342                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1343                         return $item['author-id'];
1344                 } elseif (!empty($item['contact-id'])) {
1345                         return $item['contact-id'];
1346                 } else {
1347                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1348                         if (!empty($contact_id)) {
1349                                 return $contact_id;
1350                         }
1351                 }
1352                 return $item['author-id'];
1353         }
1354
1355         // This function will finally cover most of the preparation functionality in mod/item.php
1356         public static function prepare(&$item)
1357         {
1358                 /*
1359                  * @TODO: Unused code triggering inspection errors
1360                  *
1361                 $data = BBCode::getAttachmentData($item['body']);
1362                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1363                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1364                         $posttype = Item::PT_PAGE;
1365                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1366                 }
1367                  */
1368         }
1369
1370         /**
1371          * Write an item array into a spool file to be inserted later.
1372          * This command is called whenever there are issues storing an item.
1373          *
1374          * @param array $item The item fields that are to be inserted
1375          * @throws \Exception
1376          */
1377         private static function spool($orig_item)
1378         {
1379                 // Now we store the data in the spool directory
1380                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1381                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1382
1383                 $spoolpath = get_spoolpath();
1384                 if ($spoolpath != "") {
1385                         $spool = $spoolpath . '/' . $file;
1386
1387                         file_put_contents($spool, json_encode($orig_item));
1388                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1389                 }
1390         }
1391
1392         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1393         {
1394                 $orig_item = $item;
1395
1396                 $priority = PRIORITY_HIGH;
1397
1398                 // If it is a posting where users should get notifications, then define it as wall posting
1399                 if ($notify) {
1400                         $item['wall'] = 1;
1401                         $item['origin'] = 1;
1402                         $item['network'] = Protocol::DFRN;
1403                         $item['protocol'] = Conversation::PARCEL_DFRN;
1404
1405                         if (is_int($notify)) {
1406                                 $priority = $notify;
1407                         }
1408                 } else {
1409                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1410                 }
1411
1412                 $item['guid'] = self::guid($item, $notify);
1413                 $item['uri'] = substr(Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']))), 0, 255);
1414
1415                 // Store URI data
1416                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1417
1418                 // Store conversation data
1419                 $item = Conversation::insert($item);
1420
1421                 /*
1422                  * If a Diaspora signature structure was passed in, pull it out of the
1423                  * item array and set it aside for later storage.
1424                  */
1425
1426                 $dsprsig = null;
1427                 if (isset($item['dsprsig'])) {
1428                         $encoded_signature = $item['dsprsig'];
1429                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1430                         unset($item['dsprsig']);
1431                 }
1432
1433                 $diaspora_signed_text = '';
1434                 if (isset($item['diaspora_signed_text'])) {
1435                         $diaspora_signed_text = $item['diaspora_signed_text'];
1436                         unset($item['diaspora_signed_text']);
1437                 }
1438
1439                 // Converting the plink
1440                 /// @TODO Check if this is really still needed
1441                 if ($item['network'] == Protocol::OSTATUS) {
1442                         if (isset($item['plink'])) {
1443                                 $item['plink'] = OStatus::convertHref($item['plink']);
1444                         } elseif (isset($item['uri'])) {
1445                                 $item['plink'] = OStatus::convertHref($item['uri']);
1446                         }
1447                 }
1448
1449                 if (!empty($item['thr-parent'])) {
1450                         $item['parent-uri'] = $item['thr-parent'];
1451                 }
1452
1453                 $activity = DI::activity();
1454
1455                 if (isset($item['gravity'])) {
1456                         $item['gravity'] = intval($item['gravity']);
1457                 } elseif ($item['parent-uri'] === $item['uri']) {
1458                         $item['gravity'] = GRAVITY_PARENT;
1459                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1460                         $item['gravity'] = GRAVITY_COMMENT;
1461                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1462                         $item['gravity'] = GRAVITY_ACTIVITY;
1463                 } else {
1464                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1465                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1466                 }
1467
1468                 $uid = intval($item['uid']);
1469
1470                 // check for create date and expire time
1471                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1472
1473                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1474                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1475                         $expire_interval = $user['expire'];
1476                 }
1477
1478                 if (($expire_interval > 0) && !empty($item['created'])) {
1479                         $expire_date = time() - ($expire_interval * 86400);
1480                         $created_date = strtotime($item['created']);
1481                         if ($created_date < $expire_date) {
1482                                 Logger::notice('Item created before expiration interval.', [
1483                                         'created' => date('c', $created_date),
1484                                         'expired' => date('c', $expire_date),
1485                                         '$item' => $item
1486                                 ]);
1487                                 return 0;
1488                         }
1489                 }
1490
1491                 /*
1492                  * Do we already have this item?
1493                  * We have to check several networks since Friendica posts could be repeated
1494                  * via OStatus (maybe Diasporsa as well)
1495                  */
1496                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1497                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1498                                 trim($item['uri']), $item['uid'],
1499                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1500                         $existing = self::selectFirst(['id', 'network'], $condition);
1501                         if (DBA::isResult($existing)) {
1502                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1503                                 if ($uid != 0) {
1504                                         Logger::notice('Item already existed for user', [
1505                                                 'uri' => $item['uri'],
1506                                                 'uid' => $uid,
1507                                                 'network' => $item['network'],
1508                                                 'existing_id' => $existing["id"],
1509                                                 'existing_network' => $existing["network"]
1510                                         ]);
1511                                 }
1512
1513                                 return $existing["id"];
1514                         }
1515                 }
1516
1517                 $item['wall']          = intval($item['wall'] ?? 0);
1518                 $item['extid']         = trim($item['extid'] ?? '');
1519                 $item['author-name']   = trim($item['author-name'] ?? '');
1520                 $item['author-link']   = trim($item['author-link'] ?? '');
1521                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1522                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1523                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1524                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1525                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1526                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1527                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1528                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1529                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1530                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
1531                 $item['location']      = trim($item['location'] ?? '');
1532                 $item['coord']         = trim($item['coord'] ?? '');
1533                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1534                 $item['deleted']       = 0;
1535                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1536                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1537                 $item['verb']          = trim($item['verb'] ?? '');
1538                 $item['object-type']   = trim($item['object-type'] ?? '');
1539                 $item['object']        = trim($item['object'] ?? '');
1540                 $item['target-type']   = trim($item['target-type'] ?? '');
1541                 $item['target']        = trim($item['target'] ?? '');
1542                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
1543                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1544                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1545                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1546                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1547                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1548                 $item['body']          = trim($item['body'] ?? '');
1549                 $item['tag']           = trim($item['tag'] ?? '');
1550                 $item['attach']        = trim($item['attach'] ?? '');
1551                 $item['app']           = trim($item['app'] ?? '');
1552                 $item['origin']        = intval($item['origin'] ?? 0);
1553                 $item['postopts']      = trim($item['postopts'] ?? '');
1554                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1555                 $item['event-id']      = intval($item['event-id'] ?? 0);
1556                 $item['inform']        = trim($item['inform'] ?? '');
1557                 $item['file']          = trim($item['file'] ?? '');
1558
1559                 // When there is no content then we don't post it
1560                 if ($item['body'].$item['title'] == '') {
1561                         Logger::notice('No body, no title.');
1562                         return 0;
1563                 }
1564
1565                 self::addLanguageToItemArray($item);
1566
1567                 // Items cannot be stored before they happen ...
1568                 if ($item['created'] > DateTimeFormat::utcNow()) {
1569                         $item['created'] = DateTimeFormat::utcNow();
1570                 }
1571
1572                 // We haven't invented time travel by now.
1573                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1574                         $item['edited'] = DateTimeFormat::utcNow();
1575                 }
1576
1577                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1578
1579                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1580                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1581
1582                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1583
1584                 if (Contact::isBlocked($item['author-id'])) {
1585                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1586                         return 0;
1587                 }
1588
1589                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1590                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1591                         return 0;
1592                 }
1593
1594                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1595                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1596                         return 0;
1597                 }
1598
1599                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1600                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1601
1602                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1603
1604                 if (Contact::isBlocked($item['owner-id'])) {
1605                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1606                         return 0;
1607                 }
1608
1609                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1610                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1611                         return 0;
1612                 }
1613
1614                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1615                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1616                         return 0;
1617                 }
1618
1619                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1620                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1621                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1622                         return 0;
1623                 }
1624
1625                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1626                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1627                         return 0;
1628                 }
1629
1630                 // We don't store the causer, we only have it here for the checks above
1631                 unset($item['causer-id']);
1632                 unset($item['causer-link']);
1633
1634                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1635                 $item["contact-id"] = self::contactId($item);
1636
1637                 if ($item['network'] == Protocol::PHANTOM) {
1638                         $item['network'] = Protocol::DFRN;
1639                         Logger::notice('Missing network, setting to {network}.', [
1640                                 'uri' => $item["uri"],
1641                                 'network' => $item['network'],
1642                                 'callstack' => System::callstack()
1643                         ]);
1644                 }
1645
1646                 // Checking if there is already an item with the same guid
1647                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1648                 if (self::exists($condition)) {
1649                         Logger::notice('Found already existing item', [
1650                                 'guid' => $item['guid'],
1651                                 'uid' => $item['uid'],
1652                                 'network' => $item['network']
1653                         ]);
1654                         return 0;
1655                 }
1656
1657                 if ($item['verb'] == Activity::FOLLOW) {
1658                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1659                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1660                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1661                                 return 0;
1662                         }
1663
1664                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1665                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1666                         if (self::exists($condition)) {
1667                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1668                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1669                                 return 0;
1670                         }
1671                 }
1672
1673                 // Check for hashtags in the body and repair or add hashtag links
1674                 self::setHashtags($item);
1675
1676                 $item['thr-parent'] = $item['parent-uri'];
1677
1678                 $notify_type = Delivery::POST;
1679                 $allow_cid = '';
1680                 $allow_gid = '';
1681                 $deny_cid  = '';
1682                 $deny_gid  = '';
1683
1684                 if ($item['parent-uri'] === $item['uri']) {
1685                         $parent_id = 0;
1686                         $parent_deleted = 0;
1687                         $allow_cid = $item['allow_cid'];
1688                         $allow_gid = $item['allow_gid'];
1689                         $deny_cid  = $item['deny_cid'];
1690                         $deny_gid  = $item['deny_gid'];
1691                 } else {
1692                         // find the parent and snarf the item id and ACLs
1693                         // and anything else we need to inherit
1694
1695                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1696                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1697                                 'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1698                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1699                         $params = ['order' => ['id' => false]];
1700                         $parent = self::selectFirst($fields, $condition, $params);
1701
1702                         if (DBA::isResult($parent)) {
1703                                 // is the new message multi-level threaded?
1704                                 // even though we don't support it now, preserve the info
1705                                 // and re-attach to the conversation parent.
1706
1707                                 if ($parent['uri'] != $parent['parent-uri']) {
1708                                         $item['parent-uri'] = $parent['parent-uri'];
1709
1710                                         $condition = ['uri' => $item['parent-uri'],
1711                                                 'parent-uri' => $item['parent-uri'],
1712                                                 'uid' => $item['uid']];
1713                                         $params = ['order' => ['id' => false]];
1714                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1715
1716                                         if (DBA::isResult($toplevel_parent)) {
1717                                                 $parent = $toplevel_parent;
1718                                         }
1719                                 }
1720
1721                                 $parent_id      = $parent['id'];
1722                                 $parent_deleted = $parent['deleted'];
1723                                 $allow_cid      = $parent['allow_cid'];
1724                                 $allow_gid      = $parent['allow_gid'];
1725                                 $deny_cid       = $parent['deny_cid'];
1726                                 $deny_gid       = $parent['deny_gid'];
1727                                 $item['wall']   = $parent['wall'];
1728
1729                                 /*
1730                                  * If the parent is private, force privacy for the entire conversation
1731                                  * This differs from the above settings as it subtly allows comments from
1732                                  * email correspondents to be private even if the overall thread is not.
1733                                  */
1734                                 if ($parent['private']) {
1735                                         $item['private'] = $parent['private'];
1736                                 }
1737
1738                                 /*
1739                                  * Edge case. We host a public forum that was originally posted to privately.
1740                                  * The original author commented, but as this is a comment, the permissions
1741                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1742                                  */
1743                                 if ((intval($parent['forum_mode']) == 1) && ($parent['private'] != self::PUBLIC)) {
1744                                         $item['private'] = self::PUBLIC;
1745                                 }
1746
1747                                 // If its a post that originated here then tag the thread as "mention"
1748                                 if ($item['origin'] && $item['uid']) {
1749                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1750                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1751                                 }
1752
1753                                 // Update the contact relations
1754                                 if ($item['author-id'] != $parent['author-id']) {
1755                                         DBA::update('contact-relation', ['last-interaction' => $item['created']], ['cid' => $parent['author-id'], 'relation-cid' => $item['author-id']], true);
1756                                 }
1757                         } else {
1758                                 /*
1759                                  * Allow one to see reply tweets from status.net even when
1760                                  * we don't have or can't see the original post.
1761                                  */
1762                                 if ($force_parent) {
1763                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1764                                         $parent_id = 0;
1765                                         $item['parent-uri'] = $item['uri'];
1766                                         $item['gravity'] = GRAVITY_PARENT;
1767                                 } else {
1768                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1769                                         return 0;
1770                                 }
1771
1772                                 $parent_deleted = 0;
1773                         }
1774                 }
1775
1776                 if (stristr($item['verb'], Activity::POKE)) {
1777                         $notify_type = Delivery::POKE;
1778                 }
1779
1780                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1781                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1782
1783                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1784                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1785                 if (self::exists($condition)) {
1786                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1787                         return 0;
1788                 }
1789
1790                 // On Friendica and Diaspora the GUID is unique
1791                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1792                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1793                         if (self::exists($condition)) {
1794                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1795                                 return 0;
1796                         }
1797                 } elseif ($item['network'] == Protocol::OSTATUS) {
1798                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1799                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1800                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1801                         if (self::exists($condition)) {
1802                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1803                                 return 0;
1804                         }
1805                 }
1806
1807                 // Is this item available in the global items (with uid=0)?
1808                 if ($item["uid"] == 0) {
1809                         $item["global"] = true;
1810
1811                         // Set the global flag on all items if this was a global item entry
1812                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1813                 } else {
1814                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1815                 }
1816
1817                 // ACL settings
1818                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1819                         $private = self::PRIVATE;
1820                 } else {
1821                         $private = $item['private'];
1822                 }
1823
1824                 $item["allow_cid"] = $allow_cid;
1825                 $item["allow_gid"] = $allow_gid;
1826                 $item["deny_cid"] = $deny_cid;
1827                 $item["deny_gid"] = $deny_gid;
1828                 $item["private"] = $private;
1829                 $item["deleted"] = $parent_deleted;
1830
1831                 // Fill the cache field
1832                 self::putInCache($item);
1833
1834                 if ($notify) {
1835                         $item['edit'] = false;
1836                         $item['parent'] = $parent_id;
1837                         Hook::callAll('post_local', $item);
1838                         unset($item['edit']);
1839                         unset($item['parent']);
1840                 } else {
1841                         Hook::callAll('post_remote', $item);
1842                 }
1843
1844                 // This array field is used to trigger some automatic reactions
1845                 // It is mainly used in the "post_local" hook.
1846                 unset($item['api_source']);
1847
1848                 if (!empty($item['cancel'])) {
1849                         Logger::log('post cancelled by addon.');
1850                         return 0;
1851                 }
1852
1853                 /*
1854                  * Check for already added items.
1855                  * There is a timing issue here that sometimes creates double postings.
1856                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1857                  */
1858                 if ($item["uid"] == 0) {
1859                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1860                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1861                                 return 0;
1862                         }
1863                 }
1864
1865                 Logger::log('' . print_r($item,true), Logger::DATA);
1866
1867                 if (array_key_exists('tag', $item)) {
1868                         $tags = $item['tag'];
1869                         unset($item['tag']);
1870                 } else {
1871                         $tags = '';
1872                 }
1873
1874                 if (array_key_exists('file', $item)) {
1875                         $files = $item['file'];
1876                         unset($item['file']);
1877                 } else {
1878                         $files = '';
1879                 }
1880
1881                 // Creates or assigns the permission set
1882                 $item['psid'] = PermissionSet::getIdFromACL(
1883                         $item['uid'],
1884                         $item['allow_cid'],
1885                         $item['allow_gid'],
1886                         $item['deny_cid'],
1887                         $item['deny_gid']
1888                 );
1889
1890                 $item['allow_cid'] = null;
1891                 $item['allow_gid'] = null;
1892                 $item['deny_cid'] = null;
1893                 $item['deny_gid'] = null;
1894
1895                 // We are doing this outside of the transaction to avoid timing problems
1896                 if (!self::insertActivity($item)) {
1897                         self::insertContent($item);
1898                 }
1899
1900                 $delivery_data = ItemDeliveryData::extractFields($item);
1901
1902                 unset($item['postopts']);
1903                 unset($item['inform']);
1904
1905                 // These fields aren't stored anymore in the item table, they are fetched upon request
1906                 unset($item['author-link']);
1907                 unset($item['author-name']);
1908                 unset($item['author-avatar']);
1909                 unset($item['author-network']);
1910
1911                 unset($item['owner-link']);
1912                 unset($item['owner-name']);
1913                 unset($item['owner-avatar']);
1914
1915                 $like_no_comment = DI::config()->get('system', 'like_no_comment');
1916
1917                 DBA::transaction();
1918                 $ret = DBA::insert('item', $item);
1919
1920                 // When the item was successfully stored we fetch the ID of the item.
1921                 if (DBA::isResult($ret)) {
1922                         $current_post = DBA::lastInsertId();
1923                 } else {
1924                         // This can happen - for example - if there are locking timeouts.
1925                         DBA::rollback();
1926
1927                         // Store the data into a spool file so that we can try again later.
1928                         self::spool($orig_item);
1929                         return 0;
1930                 }
1931
1932                 if ($current_post == 0) {
1933                         // This is one of these error messages that never should occur.
1934                         Logger::log("couldn't find created item - we better quit now.");
1935                         DBA::rollback();
1936                         return 0;
1937                 }
1938
1939                 // How much entries have we created?
1940                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1941                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1942
1943                 if ($entries > 1) {
1944                         // There are duplicates. We delete our just created entry.
1945                         Logger::info('Delete duplicated item', ['id' => $current_post, 'uri' => $item['uri'], 'uid' => $item['uid'], 'guid' => $item['guid']]);
1946
1947                         // Yes, we could do a rollback here - but we possibly are still having users with MyISAM.
1948                         DBA::delete('item', ['id' => $current_post]);
1949                         DBA::commit();
1950                         return 0;
1951                 } elseif ($entries == 0) {
1952                         // This really should never happen since we quit earlier if there were problems.
1953                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1954                         DBA::rollback();
1955                         return 0;
1956                 }
1957
1958                 Logger::log('created item '.$current_post);
1959
1960                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1961                         $parent_id = $current_post;
1962                 }
1963
1964                 // Set parent id
1965                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1966
1967                 $item['id'] = $current_post;
1968                 $item['parent'] = $parent_id;
1969
1970                 // update the commented timestamp on the parent
1971                 // Only update "commented" if it is really a comment
1972                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1973                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1974                 } else {
1975                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1976                 }
1977
1978                 if ($dsprsig) {
1979                         /*
1980                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1981                          * We can check for this condition when we decode and encode the stuff again.
1982                          */
1983                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1984                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1985                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1986                         }
1987
1988                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1989                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1990                         }
1991                 }
1992
1993                 if (!empty($diaspora_signed_text)) {
1994                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1995                 }
1996
1997                 if ($item['parent-uri'] === $item['uri']) {
1998                         self::addThread($current_post);
1999                 } else {
2000                         self::updateThread($parent_id);
2001                 }
2002
2003                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
2004                         ItemDeliveryData::insert($current_post, $delivery_data);
2005                 }
2006
2007                 DBA::commit();
2008
2009                 /*
2010                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
2011                  * This is not perfect - but a workable solution until we found the reason for the problem.
2012                  */
2013                 if (!empty($tags)) {
2014                         Term::insertFromTagFieldByItemId($current_post, $tags);
2015                 }
2016
2017                 if (!empty($files)) {
2018                         Term::insertFromFileFieldByItemId($current_post, $files);
2019                 }
2020
2021                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
2022                 if (self::tagDeliver($item['uid'], $current_post)) {
2023                         // Get the user information for the logging
2024                         $user = User::getById($uid);
2025
2026                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
2027                         return 0;
2028                 }
2029
2030                 if (!$dontcache) {
2031                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2032                         if (DBA::isResult($posted_item)) {
2033                                 if ($notify) {
2034                                         Hook::callAll('post_local_end', $posted_item);
2035                                 } else {
2036                                         Hook::callAll('post_remote_end', $posted_item);
2037                                 }
2038                         } else {
2039                                 Logger::log('new item not found in DB, id ' . $current_post);
2040                         }
2041                 }
2042
2043                 if ($item['parent-uri'] === $item['uri']) {
2044                         self::addShadow($current_post);
2045                 } else {
2046                         self::addShadowPost($current_post);
2047                 }
2048
2049                 self::updateContact($item);
2050
2051                 UserItem::setNotification($current_post);
2052
2053                 check_user_notification($current_post);
2054
2055                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2056                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2057                 }
2058
2059                 return $current_post;
2060         }
2061
2062         /**
2063          * Insert a new item content entry
2064          *
2065          * @param array $item The item fields that are to be inserted
2066          * @return bool
2067          * @throws \Exception
2068          */
2069         private static function insertActivity(&$item)
2070         {
2071                 $activity_index = self::activityToIndex($item['verb']);
2072
2073                 if ($activity_index < 0) {
2074                         return false;
2075                 }
2076
2077                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2078
2079                 // We just remove everything that is content
2080                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2081                         unset($item[$field]);
2082                 }
2083
2084                 // To avoid timing problems, we are using locks.
2085                 $locked = DI::lock()->acquire('item_insert_activity');
2086                 if (!$locked) {
2087                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2088                 }
2089
2090                 // Do we already have this content?
2091                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2092                 if (DBA::isResult($item_activity)) {
2093                         $item['iaid'] = $item_activity['id'];
2094                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2095                 } elseif (DBA::insert('item-activity', $fields)) {
2096                         $item['iaid'] = DBA::lastInsertId();
2097                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2098                 } else {
2099                         // This shouldn't happen.
2100                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2101                         DI::lock()->release('item_insert_activity');
2102                         return false;
2103                 }
2104                 if ($locked) {
2105                         DI::lock()->release('item_insert_activity');
2106                 }
2107                 return true;
2108         }
2109
2110         /**
2111          * Insert a new item content entry
2112          *
2113          * @param array $item The item fields that are to be inserted
2114          * @throws \Exception
2115          */
2116         private static function insertContent(&$item)
2117         {
2118                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2119
2120                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2121                         if (isset($item[$field])) {
2122                                 $fields[$field] = $item[$field];
2123                                 unset($item[$field]);
2124                         }
2125                 }
2126
2127                 // To avoid timing problems, we are using locks.
2128                 $locked = DI::lock()->acquire('item_insert_content');
2129                 if (!$locked) {
2130                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2131                 }
2132
2133                 // Do we already have this content?
2134                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2135                 if (DBA::isResult($item_content)) {
2136                         $item['icid'] = $item_content['id'];
2137                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2138                 } elseif (DBA::insert('item-content', $fields)) {
2139                         $item['icid'] = DBA::lastInsertId();
2140                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2141                 } else {
2142                         // This shouldn't happen.
2143                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2144                 }
2145                 if ($locked) {
2146                         DI::lock()->release('item_insert_content');
2147                 }
2148         }
2149
2150         /**
2151          * Update existing item content entries
2152          *
2153          * @param array $item      The item fields that are to be changed
2154          * @param array $condition The condition for finding the item content entries
2155          * @return bool
2156          * @throws \Exception
2157          */
2158         private static function updateActivity($item, $condition)
2159         {
2160                 if (empty($item['verb'])) {
2161                         return false;
2162                 }
2163                 $activity_index = self::activityToIndex($item['verb']);
2164
2165                 if ($activity_index < 0) {
2166                         return false;
2167                 }
2168
2169                 $fields = ['activity' => $activity_index];
2170
2171                 Logger::log('Update activity for ' . json_encode($condition));
2172
2173                 DBA::update('item-activity', $fields, $condition, true);
2174
2175                 return true;
2176         }
2177
2178         /**
2179          * Update existing item content entries
2180          *
2181          * @param array $item      The item fields that are to be changed
2182          * @param array $condition The condition for finding the item content entries
2183          * @throws \Exception
2184          */
2185         private static function updateContent($item, $condition)
2186         {
2187                 // We have to select only the fields from the "item-content" table
2188                 $fields = [];
2189                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2190                         if (isset($item[$field])) {
2191                                 $fields[$field] = $item[$field];
2192                         }
2193                 }
2194
2195                 if (empty($fields)) {
2196                         // when there are no fields at all, just use the condition
2197                         // This is to ensure that we always store content.
2198                         $fields = $condition;
2199                 }
2200
2201                 Logger::log('Update content for ' . json_encode($condition));
2202
2203                 DBA::update('item-content', $fields, $condition, true);
2204         }
2205
2206         /**
2207          * Distributes public items to the receivers
2208          *
2209          * @param integer $itemid      Item ID that should be added
2210          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2211          * @throws \Exception
2212          */
2213         public static function distribute($itemid, $signed_text = '')
2214         {
2215                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2216                 $parent = self::selectFirst(['owner-id'], $condition);
2217                 if (!DBA::isResult($parent)) {
2218                         return;
2219                 }
2220
2221                 // Only distribute public items from native networks
2222                 $condition = ['id' => $itemid, 'uid' => 0,
2223                         'network' => array_merge(Protocol::FEDERATED ,['']),
2224                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2225                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2226                 if (!DBA::isResult($item)) {
2227                         return;
2228                 }
2229
2230                 $origin = $item['origin'];
2231
2232                 unset($item['id']);
2233                 unset($item['parent']);
2234                 unset($item['mention']);
2235                 unset($item['wall']);
2236                 unset($item['origin']);
2237                 unset($item['starred']);
2238
2239                 $users = [];
2240
2241                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2242                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2243                 if (!DBA::isResult($owner)) {
2244                         return;
2245                 }
2246
2247                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2248                 $contacts = DBA::select('contact', ['uid'], $condition);
2249                 while ($contact = DBA::fetch($contacts)) {
2250                         if ($contact['uid'] == 0) {
2251                                 continue;
2252                         }
2253
2254                         $users[$contact['uid']] = $contact['uid'];
2255                 }
2256                 DBA::close($contacts);
2257
2258                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2259                 $contacts = DBA::select('contact', ['uid'], $condition);
2260                 while ($contact = DBA::fetch($contacts)) {
2261                         if ($contact['uid'] == 0) {
2262                                 continue;
2263                         }
2264
2265                         $users[$contact['uid']] = $contact['uid'];
2266                 }
2267                 DBA::close($contacts);
2268
2269                 if (!empty($owner['alias'])) {
2270                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2271                         $contacts = DBA::select('contact', ['uid'], $condition);
2272                         while ($contact = DBA::fetch($contacts)) {
2273                                 if ($contact['uid'] == 0) {
2274                                         continue;
2275                                 }
2276
2277                                 $users[$contact['uid']] = $contact['uid'];
2278                         }
2279                         DBA::close($contacts);
2280                 }
2281
2282                 $origin_uid = 0;
2283
2284                 if ($item['uri'] != $item['parent-uri']) {
2285                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2286                         while ($parent = self::fetch($parents)) {
2287                                 $users[$parent['uid']] = $parent['uid'];
2288                                 if ($parent['origin'] && !$origin) {
2289                                         $origin_uid = $parent['uid'];
2290                                 }
2291                         }
2292                 }
2293
2294                 foreach ($users as $uid) {
2295                         if ($origin_uid == $uid) {
2296                                 $item['diaspora_signed_text'] = $signed_text;
2297                         }
2298                         self::storeForUser($itemid, $item, $uid);
2299                 }
2300         }
2301
2302         /**
2303          * Store public items for the receivers
2304          *
2305          * @param integer $itemid Item ID that should be added
2306          * @param array   $item   The item entry that will be stored
2307          * @param integer $uid    The user that will receive the item entry
2308          * @throws \Exception
2309          */
2310         private static function storeForUser($itemid, $item, $uid)
2311         {
2312                 $item['uid'] = $uid;
2313                 $item['origin'] = 0;
2314                 $item['wall'] = 0;
2315                 if ($item['uri'] == $item['parent-uri']) {
2316                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2317                 } else {
2318                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2319                 }
2320
2321                 if (empty($item['contact-id'])) {
2322                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2323                         if (!DBA::isResult($self)) {
2324                                 return;
2325                         }
2326                         $item['contact-id'] = $self['id'];
2327                 }
2328
2329                 /// @todo Handling of "event-id"
2330
2331                 $notify = false;
2332                 if ($item['uri'] == $item['parent-uri']) {
2333                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2334                         if (DBA::isResult($contact)) {
2335                                 $notify = self::isRemoteSelf($contact, $item);
2336                         }
2337                 }
2338
2339                 $distributed = self::insert($item, false, $notify, true);
2340
2341                 if (!$distributed) {
2342                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2343                 } else {
2344                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2345                 }
2346         }
2347
2348         /**
2349          * Add a shadow entry for a given item id that is a thread starter
2350          *
2351          * We store every public item entry additionally with the user id "0".
2352          * This is used for the community page and for the search.
2353          * It is planned that in the future we will store public item entries only once.
2354          *
2355          * @param integer $itemid Item ID that should be added
2356          * @throws \Exception
2357          */
2358         public static function addShadow($itemid)
2359         {
2360                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2361                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2362                 $item = self::selectFirst($fields, $condition);
2363
2364                 if (!DBA::isResult($item)) {
2365                         return;
2366                 }
2367
2368                 // is it already a copy?
2369                 if (($itemid == 0) || ($item['uid'] == 0)) {
2370                         return;
2371                 }
2372
2373                 // Is it a visible public post?
2374                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2375                         return;
2376                 }
2377
2378                 // is it an entry from a connector? Only add an entry for natively connected networks
2379                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2380                         return;
2381                 }
2382
2383                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2384                         return;
2385                 }
2386
2387                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2388
2389                 if (DBA::isResult($item)) {
2390                         // Preparing public shadow (removing user specific data)
2391                         $item['uid'] = 0;
2392                         unset($item['id']);
2393                         unset($item['parent']);
2394                         unset($item['wall']);
2395                         unset($item['mention']);
2396                         unset($item['origin']);
2397                         unset($item['starred']);
2398                         unset($item['postopts']);
2399                         unset($item['inform']);
2400                         if ($item['uri'] == $item['parent-uri']) {
2401                                 $item['contact-id'] = $item['owner-id'];
2402                         } else {
2403                                 $item['contact-id'] = $item['author-id'];
2404                         }
2405
2406                         $public_shadow = self::insert($item, false, false, true);
2407
2408                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2409                 }
2410         }
2411
2412         /**
2413          * Add a shadow entry for a given item id that is a comment
2414          *
2415          * This function does the same like the function above - but for comments
2416          *
2417          * @param integer $itemid Item ID that should be added
2418          * @throws \Exception
2419          */
2420         public static function addShadowPost($itemid)
2421         {
2422                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2423                 if (!DBA::isResult($item)) {
2424                         return;
2425                 }
2426
2427                 // Is it a toplevel post?
2428                 if ($item['id'] == $item['parent']) {
2429                         self::addShadow($itemid);
2430                         return;
2431                 }
2432
2433                 // Is this a shadow entry?
2434                 if ($item['uid'] == 0) {
2435                         return;
2436                 }
2437
2438                 // Is there a shadow parent?
2439                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2440                         return;
2441                 }
2442
2443                 // Is there already a shadow entry?
2444                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2445                         return;
2446                 }
2447
2448                 // Save "origin" and "parent" state
2449                 $origin = $item['origin'];
2450                 $parent = $item['parent'];
2451
2452                 // Preparing public shadow (removing user specific data)
2453                 $item['uid'] = 0;
2454                 unset($item['id']);
2455                 unset($item['parent']);
2456                 unset($item['wall']);
2457                 unset($item['mention']);
2458                 unset($item['origin']);
2459                 unset($item['starred']);
2460                 unset($item['postopts']);
2461                 unset($item['inform']);
2462                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2463
2464                 $public_shadow = self::insert($item, false, false, true);
2465
2466                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2467
2468                 // If this was a comment to a Diaspora post we don't get our comment back.
2469                 // This means that we have to distribute the comment by ourselves.
2470                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2471                         self::distribute($public_shadow);
2472                 }
2473         }
2474
2475         /**
2476          * Adds a language specification in a "language" element of given $arr.
2477          * Expects "body" element to exist in $arr.
2478          *
2479          * @param $item
2480          * @throws \Text_LanguageDetect_Exception
2481          */
2482         private static function addLanguageToItemArray(&$item)
2483         {
2484                 $naked_body = BBCode::toPlaintext($item['body'], false);
2485
2486                 $ld = new Text_LanguageDetect();
2487                 $ld->setNameMode(2);
2488                 $languages = $ld->detect($naked_body, 3);
2489
2490                 if (is_array($languages)) {
2491                         $item['language'] = json_encode($languages);
2492                 }
2493         }
2494
2495         /**
2496          * Creates an unique guid out of a given uri
2497          *
2498          * @param string $uri uri of an item entry
2499          * @param string $host hostname for the GUID prefix
2500          * @return string unique guid
2501          */
2502         public static function guidFromUri($uri, $host)
2503         {
2504                 // Our regular guid routine is using this kind of prefix as well
2505                 // We have to avoid that different routines could accidentally create the same value
2506                 $parsed = parse_url($uri);
2507
2508                 // We use a hash of the hostname as prefix for the guid
2509                 $guid_prefix = hash("crc32", $host);
2510
2511                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2512                 unset($parsed["scheme"]);
2513
2514                 // Glue it together to be able to make a hash from it
2515                 $host_id = implode("/", $parsed);
2516
2517                 // We could use any hash algorithm since it isn't a security issue
2518                 $host_hash = hash("ripemd128", $host_id);
2519
2520                 return $guid_prefix.$host_hash;
2521         }
2522
2523         /**
2524          * generate an unique URI
2525          *
2526          * @param integer $uid  User id
2527          * @param string  $guid An existing GUID (Otherwise it will be generated)
2528          *
2529          * @return string
2530          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2531          */
2532         public static function newURI($uid, $guid = "")
2533         {
2534                 if ($guid == "") {
2535                         $guid = System::createUUID();
2536                 }
2537
2538                 return DI::baseUrl()->get() . '/objects/' . $guid;
2539         }
2540
2541         /**
2542          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2543          *
2544          * This can be used to filter for inactive contacts.
2545          * Only do this for public postings to avoid privacy problems, since poco data is public.
2546          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2547          *
2548          * @param array $arr Contains the just posted item record
2549          * @throws \Exception
2550          */
2551         private static function updateContact($arr)
2552         {
2553                 // Unarchive the author
2554                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2555                 if (DBA::isResult($contact)) {
2556                         Contact::unmarkForArchival($contact);
2557                 }
2558
2559                 // Unarchive the contact if it's not our own contact
2560                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2561                 if (DBA::isResult($contact)) {
2562                         Contact::unmarkForArchival($contact);
2563                 }
2564
2565                 $update = (($arr['private'] != self::PRIVATE) && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2566
2567                 // Is it a forum? Then we don't care about the rules from above
2568                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2569                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2570                                 $update = true;
2571                         }
2572                 }
2573
2574                 if ($update) {
2575                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2576                                 ['id' => $arr['contact-id']]);
2577                 }
2578                 // Now do the same for the system wide contacts with uid=0
2579                 if ($arr['private'] != self::PRIVATE) {
2580                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2581                                 ['id' => $arr['owner-id']]);
2582
2583                         if ($arr['owner-id'] != $arr['author-id']) {
2584                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2585                                         ['id' => $arr['author-id']]);
2586                         }
2587                 }
2588         }
2589
2590         public static function setHashtags(&$item)
2591         {
2592                 $tags = BBCode::getTags($item["body"]);
2593
2594                 // No hashtags?
2595                 if (!count($tags)) {
2596                         return false;
2597                 }
2598
2599                 // What happens in [code], stays in [code]!
2600                 // escape the # and the [
2601                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2602                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2603                         function ($match) {
2604                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2605                                 $find = ['#', '['];
2606                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2607                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2608                         }, $item["body"]);
2609
2610                 // This sorting is important when there are hashtags that are part of other hashtags
2611                 // Otherwise there could be problems with hashtags like #test and #test2
2612                 rsort($tags);
2613
2614                 $URLSearchString = "^\[\]";
2615
2616                 // All hashtags should point to the home server if "local_tags" is activated
2617                 if (DI::config()->get('system', 'local_tags')) {
2618                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2619                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2620
2621                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2622                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2623                 }
2624
2625                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2626                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2627                         function ($match) {
2628                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2629                         }, $item["body"]);
2630
2631                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2632                         function ($match) {
2633                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2634                         }, $item["body"]);
2635
2636                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2637                         function ($match) {
2638                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2639                         }, $item["body"]);
2640
2641                 // Repair recursive urls
2642                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2643                                 "&num;$2", $item["body"]);
2644
2645                 foreach ($tags as $tag) {
2646                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2647                                 continue;
2648                         }
2649
2650                         $basetag = str_replace('_',' ',substr($tag,1));
2651                         $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2652
2653                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2654
2655                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2656                                 if (strlen($item["tag"])) {
2657                                         $item["tag"] = ',' . $item["tag"];
2658                                 }
2659                                 $item["tag"] = $newtag . $item["tag"];
2660                         }
2661                 }
2662
2663                 // Convert back the masked hashtags
2664                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2665
2666                 // Remember! What happens in [code], stays in [code]
2667                 // roleback the # and [
2668                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2669                         function ($match) {
2670                                 // we truly unESCape all sharp and leftsquarebracket
2671                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2672                                 $replace = ['#', '['];
2673                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2674                         }, $item["body"]);
2675         }
2676
2677         /**
2678          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2679          *
2680          * @param int $uid
2681          * @param int $item_id
2682          * @return boolean true if item was deleted, else false
2683          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2684          * @throws \ImagickException
2685          */
2686         private static function tagDeliver($uid, $item_id)
2687         {
2688                 $mention = false;
2689
2690                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2691                 if (!DBA::isResult($user)) {
2692                         return false;
2693                 }
2694
2695                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2696                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2697
2698                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2699                 if (!DBA::isResult($item)) {
2700                         return false;
2701                 }
2702
2703                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2704
2705                 /*
2706                  * Diaspora uses their own hardwired link URL in @-tags
2707                  * instead of the one we supply with webfinger
2708                  */
2709                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2710
2711                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2712                 if ($cnt) {
2713                         foreach ($matches as $mtch) {
2714                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2715                                         $mention = true;
2716                                         Logger::log('mention found: ' . $mtch[2]);
2717                                 }
2718                         }
2719                 }
2720
2721                 if (!$mention) {
2722                         if (($community_page || $prvgroup) &&
2723                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2724                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2725                                 DBA::delete('item', ['id' => $item_id]);
2726                                 return true;
2727                         }
2728                         return false;
2729                 }
2730
2731                 $arr = ['item' => $item, 'user' => $user];
2732
2733                 Hook::callAll('tagged', $arr);
2734
2735                 if (!$community_page && !$prvgroup) {
2736                         return false;
2737                 }
2738
2739                 /*
2740                  * tgroup delivery - setup a second delivery chain
2741                  * prevent delivery looping - only proceed
2742                  * if the message originated elsewhere and is a top-level post
2743                  */
2744                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2745                         return false;
2746                 }
2747
2748                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2749                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2750                 if (!DBA::isResult($self)) {
2751                         return false;
2752                 }
2753
2754                 $owner_id = Contact::getIdForURL($self['url']);
2755
2756                 // also reset all the privacy bits to the forum default permissions
2757
2758                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2759
2760                 $psid = PermissionSet::getIdFromACL(
2761                         $user['uid'],
2762                         $user['allow_cid'],
2763                         $user['allow_gid'],
2764                         $user['deny_cid'],
2765                         $user['deny_gid']
2766                 );
2767
2768                 $forum_mode = ($prvgroup ? 2 : 1);
2769
2770                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2771                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2772                 self::update($fields, ['id' => $item_id]);
2773
2774                 self::updateThread($item_id);
2775
2776                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2777
2778                 return false;
2779         }
2780
2781         public static function isRemoteSelf($contact, &$datarray)
2782         {
2783                 if (!$contact['remote_self']) {
2784                         return false;
2785                 }
2786
2787                 // Prevent the forwarding of posts that are forwarded
2788                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2789                         Logger::log('Already forwarded', Logger::DEBUG);
2790                         return false;
2791                 }
2792
2793                 // Prevent to forward already forwarded posts
2794                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2795                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2796                         return false;
2797                 }
2798
2799                 // Only forward posts
2800                 if ($datarray["verb"] != Activity::POST) {
2801                         Logger::log('No post', Logger::DEBUG);
2802                         return false;
2803                 }
2804
2805                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2806                         Logger::log('Not public', Logger::DEBUG);
2807                         return false;
2808                 }
2809
2810                 $datarray2 = $datarray;
2811                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2812                 if ($contact['remote_self'] == 2) {
2813                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2814                                         ['uid' => $contact['uid'], 'self' => true]);
2815                         if (DBA::isResult($self)) {
2816                                 $datarray['contact-id'] = $self["id"];
2817
2818                                 $datarray['owner-name'] = $self["name"];
2819                                 $datarray['owner-link'] = $self["url"];
2820                                 $datarray['owner-avatar'] = $self["thumb"];
2821
2822                                 $datarray['author-name']   = $datarray['owner-name'];
2823                                 $datarray['author-link']   = $datarray['owner-link'];
2824                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2825
2826                                 unset($datarray['edited']);
2827
2828                                 unset($datarray['network']);
2829                                 unset($datarray['owner-id']);
2830                                 unset($datarray['author-id']);
2831                         }
2832
2833                         if ($contact['network'] != Protocol::FEED) {
2834                                 $datarray["guid"] = System::createUUID();
2835                                 unset($datarray["plink"]);
2836                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2837                                 $datarray["parent-uri"] = $datarray["uri"];
2838                                 $datarray["thr-parent"] = $datarray["uri"];
2839                                 $datarray["extid"] = Protocol::DFRN;
2840                                 $urlpart = parse_url($datarray2['author-link']);
2841                                 $datarray["app"] = $urlpart["host"];
2842                         } else {
2843                                 $datarray['private'] = self::PUBLIC;
2844                         }
2845                 }
2846
2847                 if ($contact['network'] != Protocol::FEED) {
2848                         // Store the original post
2849                         $result = self::insert($datarray2, false, false);
2850                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2851                 } else {
2852                         $datarray["app"] = "Feed";
2853                         $result = true;
2854                 }
2855
2856                 // Trigger automatic reactions for addons
2857                 $datarray['api_source'] = true;
2858
2859                 // We have to tell the hooks who we are - this really should be improved
2860                 $_SESSION["authenticated"] = true;
2861                 $_SESSION["uid"] = $contact['uid'];
2862
2863                 return $result;
2864         }
2865
2866         /**
2867          *
2868          * @param string $s
2869          * @param int    $uid
2870          * @param array  $item
2871          * @param int    $cid
2872          * @return string
2873          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2874          * @throws \ImagickException
2875          */
2876         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2877         {
2878                 if (DI::config()->get('system', 'disable_embedded')) {
2879                         return $s;
2880                 }
2881
2882                 Logger::log('check for photos', Logger::DEBUG);
2883                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2884
2885                 $orig_body = $s;
2886                 $new_body = '';
2887
2888                 $img_start = strpos($orig_body, '[img');
2889                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2890                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2891
2892                 while (($img_st_close !== false) && ($img_len !== false)) {
2893                         $img_st_close++; // make it point to AFTER the closing bracket
2894                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2895
2896                         Logger::log('found photo ' . $image, Logger::DEBUG);
2897
2898                         if (stristr($image, $site . '/photo/')) {
2899                                 // Only embed locally hosted photos
2900                                 $replace = false;
2901                                 $i = basename($image);
2902                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2903                                 $x = strpos($i, '-');
2904
2905                                 if ($x) {
2906                                         $res = substr($i, $x + 1);
2907                                         $i = substr($i, 0, $x);
2908                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2909                                         if (DBA::isResult($photo)) {
2910                                                 /*
2911                                                  * Check to see if we should replace this photo link with an embedded image
2912                                                  * 1. No need to do so if the photo is public
2913                                                  * 2. If there's a contact-id provided, see if they're in the access list
2914                                                  *    for the photo. If so, embed it.
2915                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2916                                                  *    permissions, regardless of order but first check to see if they're an exact
2917                                                  *    match to save some processing overhead.
2918                                                  */
2919                                                 if (self::hasPermissions($photo)) {
2920                                                         if ($cid) {
2921                                                                 $recips = self::enumeratePermissions($photo);
2922                                                                 if (in_array($cid, $recips)) {
2923                                                                         $replace = true;
2924                                                                 }
2925                                                         } elseif ($item) {
2926                                                                 if (self::samePermissions($uid, $item, $photo)) {
2927                                                                         $replace = true;
2928                                                                 }
2929                                                         }
2930                                                 }
2931                                                 if ($replace) {
2932                                                         $photo_img = Photo::getImageForPhoto($photo);
2933                                                         // If a custom width and height were specified, apply before embedding
2934                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2935                                                                 Logger::log('scaling photo', Logger::DEBUG);
2936
2937                                                                 $width = intval($match[1]);
2938                                                                 $height = intval($match[2]);
2939
2940                                                                 $photo_img->scaleDown(max($width, $height));
2941                                                         }
2942
2943                                                         $data = $photo_img->asString();
2944                                                         $type = $photo_img->getType();
2945
2946                                                         Logger::log('replacing photo', Logger::DEBUG);
2947                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2948                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2949                                                 }
2950                                         }
2951                                 }
2952                         }
2953
2954                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2955                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2956                         if ($orig_body === false) {
2957                                 $orig_body = '';
2958                         }
2959
2960                         $img_start = strpos($orig_body, '[img');
2961                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2962                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2963                 }
2964
2965                 $new_body = $new_body . $orig_body;
2966
2967                 return $new_body;
2968         }
2969
2970         private static function hasPermissions($obj)
2971         {
2972                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2973                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2974         }
2975
2976         private static function samePermissions($uid, $obj1, $obj2)
2977         {
2978                 // first part is easy. Check that these are exactly the same.
2979                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2980                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2981                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2982                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2983                         return true;
2984                 }
2985
2986                 // This is harder. Parse all the permissions and compare the resulting set.
2987                 $recipients1 = self::enumeratePermissions($obj1);
2988                 $recipients2 = self::enumeratePermissions($obj2);
2989                 sort($recipients1);
2990                 sort($recipients2);
2991
2992                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2993                 return ($recipients1 == $recipients2);
2994         }
2995
2996         /**
2997          * Returns an array of contact-ids that are allowed to see this object
2998          *
2999          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
3000          * @param bool  $check_dead Prunes unavailable contacts from the result
3001          * @return array
3002          * @throws \Exception
3003          */
3004         public static function enumeratePermissions(array $obj, bool $check_dead = false)
3005         {
3006                 $aclFormater = DI::aclFormatter();
3007
3008                 $allow_people = $aclFormater->expand($obj['allow_cid']);
3009                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
3010                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
3011                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
3012                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
3013                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
3014                 $recipients   = array_diff($recipients, $deny);
3015                 return $recipients;
3016         }
3017
3018         public static function getFeedTags($item)
3019         {
3020                 $ret = [];
3021                 $matches = false;
3022                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3023                 if ($cnt) {
3024                         for ($x = 0; $x < $cnt; $x ++) {
3025                                 if ($matches[1][$x]) {
3026                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
3027                                 }
3028                         }
3029                 }
3030                 $matches = false;
3031                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3032                 if ($cnt) {
3033                         for ($x = 0; $x < $cnt; $x ++) {
3034                                 if ($matches[1][$x]) {
3035                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3036                                 }
3037                         }
3038                 }
3039                 return $ret;
3040         }
3041
3042         public static function expire($uid, $days, $network = "", $force = false)
3043         {
3044                 if (!$uid || ($days < 1)) {
3045                         return;
3046                 }
3047
3048                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3049                         $uid, GRAVITY_PARENT];
3050
3051                 /*
3052                  * $expire_network_only = save your own wall posts
3053                  * and just expire conversations started by others
3054                  */
3055                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3056
3057                 if ($expire_network_only) {
3058                         $condition[0] .= " AND NOT `wall`";
3059                 }
3060
3061                 if ($network != "") {
3062                         $condition[0] .= " AND `network` = ?";
3063                         $condition[] = $network;
3064                 }
3065
3066                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3067                 $condition[] = $days;
3068
3069                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3070
3071                 if (!DBA::isResult($items)) {
3072                         return;
3073                 }
3074
3075                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3076
3077                 // Forcing expiring of items - but not notes and marked items
3078                 if ($force) {
3079                         $expire_items = true;
3080                 }
3081
3082                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3083                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3084                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3085
3086                 $expired = 0;
3087
3088                 while ($item = Item::fetch($items)) {
3089                         // don't expire filed items
3090
3091                         if (strpos($item['file'], '[') !== false) {
3092                                 continue;
3093                         }
3094
3095                         // Only expire posts, not photos and photo comments
3096
3097                         if (!$expire_photos && strlen($item['resource-id'])) {
3098                                 continue;
3099                         } elseif (!$expire_starred && intval($item['starred'])) {
3100                                 continue;
3101                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3102                                 continue;
3103                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3104                                 continue;
3105                         }
3106
3107                         self::markForDeletionById($item['id'], PRIORITY_LOW);
3108
3109                         ++$expired;
3110                 }
3111                 DBA::close($items);
3112                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3113         }
3114
3115         public static function firstPostDate($uid, $wall = false)
3116         {
3117                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3118                 $params = ['order' => ['received' => false]];
3119                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3120                 if (DBA::isResult($thread)) {
3121                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3122                 }
3123                 return false;
3124         }
3125
3126         /**
3127          * add/remove activity to an item
3128          *
3129          * Toggle activities as like,dislike,attend of an item
3130          *
3131          * @param string $item_id
3132          * @param string $verb
3133          *            Activity verb. One of
3134          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3135          *            attendno, unattendno, attendmaybe, unattendmaybe
3136          * @return bool
3137          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3138          * @throws \ImagickException
3139          * @hook  'post_local_end'
3140          *            array $arr
3141          *            'post_id' => ID of posted item
3142          */
3143         public static function performActivity($item_id, $verb)
3144         {
3145                 if (!Session::isAuthenticated()) {
3146                         return false;
3147                 }
3148
3149                 switch ($verb) {
3150                         case 'like':
3151                         case 'unlike':
3152                                 $activity = Activity::LIKE;
3153                                 break;
3154                         case 'dislike':
3155                         case 'undislike':
3156                                 $activity = Activity::DISLIKE;
3157                                 break;
3158                         case 'attendyes':
3159                         case 'unattendyes':
3160                                 $activity = Activity::ATTEND;
3161                                 break;
3162                         case 'attendno':
3163                         case 'unattendno':
3164                                 $activity = Activity::ATTENDNO;
3165                                 break;
3166                         case 'attendmaybe':
3167                         case 'unattendmaybe':
3168                                 $activity = Activity::ATTENDMAYBE;
3169                                 break;
3170                         case 'follow':
3171                         case 'unfollow':
3172                                 $activity = Activity::FOLLOW;
3173                                 break;
3174                         default:
3175                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3176                                 return false;
3177                 }
3178
3179                 // Enable activity toggling instead of on/off
3180                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3181
3182                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3183
3184                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3185                 if (!DBA::isResult($item)) {
3186                         Logger::log('like: unknown item ' . $item_id);
3187                         return false;
3188                 }
3189
3190                 $item_uri = $item['uri'];
3191
3192                 $uid = $item['uid'];
3193                 if (($uid == 0) && local_user()) {
3194                         $uid = local_user();
3195                 }
3196
3197                 if (!Security::canWriteToUserWall($uid)) {
3198                         Logger::log('like: unable to write on wall ' . $uid);
3199                         return false;
3200                 }
3201
3202                 // Retrieves the local post owner
3203                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3204                 if (!DBA::isResult($owner_self_contact)) {
3205                         Logger::log('like: unknown owner ' . $uid);
3206                         return false;
3207                 }
3208
3209                 // Retrieve the current logged in user's public contact
3210                 $author_id = public_contact();
3211
3212                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3213                 if (!DBA::isResult($author_contact)) {
3214                         Logger::log('like: unknown author ' . $author_id);
3215                         return false;
3216                 }
3217
3218                 // Contact-id is the uid-dependant author contact
3219                 if (local_user() == $uid) {
3220                         $item_contact_id = $owner_self_contact['id'];
3221                 } else {
3222                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3223                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3224                         if (!DBA::isResult($item_contact)) {
3225                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3226                                 return false;
3227                         }
3228                 }
3229
3230                 // Look for an existing verb row
3231                 // event participation are essentially radio toggles. If you make a subsequent choice,
3232                 // we need to eradicate your first choice.
3233                 if ($event_verb_flag) {
3234                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3235
3236                         // Translate to the index based activity index
3237                         $activities = [];
3238                         foreach ($verbs as $verb) {
3239                                 $activities[] = self::activityToIndex($verb);
3240                         }
3241                 } else {
3242                         $activities = self::activityToIndex($activity);
3243                 }
3244
3245                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3246                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3247
3248                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3249
3250                 // If it exists, mark it as deleted
3251                 if (DBA::isResult($like_item)) {
3252                         self::markForDeletionById($like_item['id']);
3253
3254                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3255                                 return true;
3256                         }
3257                 }
3258
3259                 // Verb is "un-something", just trying to delete existing entries
3260                 if (strpos($verb, 'un') === 0) {
3261                         return true;
3262                 }
3263
3264                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3265
3266                 $new_item = [
3267                         'guid'          => System::createUUID(),
3268                         'uri'           => self::newURI($item['uid']),
3269                         'uid'           => $item['uid'],
3270                         'contact-id'    => $item_contact_id,
3271                         'wall'          => $item['wall'],
3272                         'origin'        => 1,
3273                         'network'       => Protocol::DFRN,
3274                         'gravity'       => GRAVITY_ACTIVITY,
3275                         'parent'        => $item['id'],
3276                         'parent-uri'    => $item['uri'],
3277                         'thr-parent'    => $item['uri'],
3278                         'owner-id'      => $author_id,
3279                         'author-id'     => $author_id,
3280                         'body'          => $activity,
3281                         'verb'          => $activity,
3282                         'object-type'   => $objtype,
3283                         'allow_cid'     => $item['allow_cid'],
3284                         'allow_gid'     => $item['allow_gid'],
3285                         'deny_cid'      => $item['deny_cid'],
3286                         'deny_gid'      => $item['deny_gid'],
3287                         'visible'       => 1,
3288                         'unseen'        => 1,
3289                 ];
3290
3291                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3292                 if (!empty($signed)) {
3293                         $new_item['diaspora_signed_text'] = json_encode($signed);
3294                 }
3295
3296                 $new_item_id = self::insert($new_item);
3297
3298                 // If the parent item isn't visible then set it to visible
3299                 if (!$item['visible']) {
3300                         self::update(['visible' => true], ['id' => $item['id']]);
3301                 }
3302
3303                 $new_item['id'] = $new_item_id;
3304
3305                 Hook::callAll('post_local_end', $new_item);
3306
3307                 return true;
3308         }
3309
3310         private static function addThread($itemid, $onlyshadow = false)
3311         {
3312                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3313                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3314                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3315                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3316                 $item = self::selectFirst($fields, $condition);
3317
3318                 if (!DBA::isResult($item)) {
3319                         return;
3320                 }
3321
3322                 $item['iid'] = $itemid;
3323
3324                 if (!$onlyshadow) {
3325                         $result = DBA::insert('thread', $item);
3326
3327                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3328                 }
3329         }
3330
3331         private static function updateThread($itemid, $setmention = false)
3332         {
3333                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3334                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3335                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3336                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3337
3338                 $item = self::selectFirst($fields, $condition);
3339                 if (!DBA::isResult($item)) {
3340                         return;
3341                 }
3342
3343                 if ($setmention) {
3344                         $item["mention"] = 1;
3345                 }
3346
3347                 $fields = [];
3348
3349                 foreach ($item as $field => $data) {
3350                         if (!in_array($field, ["guid"])) {
3351                                 $fields[$field] = $data;
3352                         }
3353                 }
3354
3355                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3356
3357                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3358         }
3359
3360         private static function deleteThread($itemid, $itemuri = "")
3361         {
3362                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3363                 if (!DBA::isResult($item)) {
3364                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3365                         return;
3366                 }
3367
3368                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3369
3370                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3371
3372                 if ($itemuri != "") {
3373                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3374                         if (!self::exists($condition)) {
3375                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3376                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3377                         }
3378                 }
3379         }
3380
3381         public static function getPermissionsSQLByUserId($owner_id)
3382         {
3383                 $local_user = local_user();
3384                 $remote_user = Session::getRemoteContactID($owner_id);
3385
3386                 /*
3387                  * Construct permissions
3388                  *
3389                  * default permissions - anonymous user
3390                  */
3391                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3392
3393                 // Profile owner - everything is visible
3394                 if ($local_user && ($local_user == $owner_id)) {
3395                         $sql = '';
3396                 } elseif ($remote_user) {
3397                         /*
3398                          * Authenticated visitor. Unless pre-verified,
3399                          * check that the contact belongs to this $owner_id
3400                          * and load the groups the visitor belongs to.
3401                          * If pre-verified, the caller is expected to have already
3402                          * done this and passed the groups into this function.
3403                          */
3404                         $set = PermissionSet::get($owner_id, $remote_user);
3405
3406                         if (!empty($set)) {
3407                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3408                         } else {
3409                                 $sql_set = '';
3410                         }
3411
3412                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3413                 }
3414
3415                 return $sql;
3416         }
3417
3418         /**
3419          * get translated item type
3420          *
3421          * @param $item
3422          * @return string
3423          */
3424         public static function postType($item)
3425         {
3426                 if (!empty($item['event-id'])) {
3427                         return DI::l10n()->t('event');
3428                 } elseif (!empty($item['resource-id'])) {
3429                         return DI::l10n()->t('photo');
3430                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3431                         return DI::l10n()->t('activity');
3432                 } elseif ($item['id'] != $item['parent']) {
3433                         return DI::l10n()->t('comment');
3434                 }
3435
3436                 return DI::l10n()->t('post');
3437         }
3438
3439         /**
3440          * Sets the "rendered-html" field of the provided item
3441          *
3442          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3443          *
3444          * @param array $item
3445          * @param bool  $update
3446          *
3447          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3448          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3449          */
3450         public static function putInCache(&$item, $update = false)
3451         {
3452                 $body = $item["body"];
3453
3454                 $rendered_hash = $item['rendered-hash'] ?? '';
3455                 $rendered_html = $item['rendered-html'] ?? '';
3456
3457                 if ($rendered_hash == ''
3458                         || $rendered_html == ""
3459                         || $rendered_hash != hash("md5", $item["body"])
3460                         || DI::config()->get("system", "ignore_cache")
3461                 ) {
3462                         self::addRedirToImageTags($item);
3463
3464                         $item["rendered-html"] = BBCode::convert($item["body"]);
3465                         $item["rendered-hash"] = hash("md5", $item["body"]);
3466
3467                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3468                         Hook::callAll('put_item_in_cache', $hook_data);
3469                         $item['rendered-html'] = $hook_data['rendered-html'];
3470                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3471                         unset($hook_data);
3472
3473                         // Force an update if the generated values differ from the existing ones
3474                         if ($rendered_hash != $item["rendered-hash"]) {
3475                                 $update = true;
3476                         }
3477
3478                         // Only compare the HTML when we forcefully ignore the cache
3479                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3480                                 $update = true;
3481                         }
3482
3483                         if ($update && !empty($item["id"])) {
3484                                 self::update(
3485                                         [
3486                                                 'rendered-html' => $item["rendered-html"],
3487                                                 'rendered-hash' => $item["rendered-hash"]
3488                                         ],
3489                                         ['id' => $item["id"]]
3490                                 );
3491                         }
3492                 }
3493
3494                 $item["body"] = $body;
3495         }
3496
3497         /**
3498          * Find any non-embedded images in private items and add redir links to them
3499          *
3500          * @param array &$item The field array of an item row
3501          */
3502         private static function addRedirToImageTags(array &$item)
3503         {
3504                 $app = DI::app();
3505
3506                 $matches = [];
3507                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3508                 if ($cnt) {
3509                         foreach ($matches as $mtch) {
3510                                 if (strpos($mtch[1], '/redir') !== false) {
3511                                         continue;
3512                                 }
3513
3514                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3515                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3516                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3517                                 }
3518                         }
3519                 }
3520         }
3521
3522         /**
3523          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3524          * If attach is true, also add icons for item attachments.
3525          *
3526          * @param array   $item
3527          * @param boolean $attach
3528          * @param boolean $is_preview
3529          * @return string item body html
3530          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3531          * @throws \ImagickException
3532          * @hook  prepare_body_init item array before any work
3533          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3534          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3535          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3536          */
3537         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3538         {
3539                 $a = DI::app();
3540                 Hook::callAll('prepare_body_init', $item);
3541
3542                 // In order to provide theme developers more possibilities, event items
3543                 // are treated differently.
3544                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3545                         $ev = Event::getItemHTML($item);
3546                         return $ev;
3547                 }
3548
3549                 $tags = Term::populateTagsFromItem($item);
3550
3551                 $item['tags'] = $tags['tags'];
3552                 $item['hashtags'] = $tags['hashtags'];
3553                 $item['mentions'] = $tags['mentions'];
3554
3555                 // Compile eventual content filter reasons
3556                 $filter_reasons = [];
3557                 if (!$is_preview && public_contact() != $item['author-id']) {
3558                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3559                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3560                         }
3561
3562                         $hook_data = [
3563                                 'item' => $item,
3564                                 'filter_reasons' => $filter_reasons
3565                         ];
3566                         Hook::callAll('prepare_body_content_filter', $hook_data);
3567                         $filter_reasons = $hook_data['filter_reasons'];
3568                         unset($hook_data);
3569                 }
3570
3571                 // Update the cached values if there is no "zrl=..." on the links.
3572                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3573
3574                 // Or update it if the current viewer is the intented viewer.
3575                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3576                         $update = true;
3577                 }
3578
3579                 self::putInCache($item, $update);
3580                 $s = $item["rendered-html"];
3581
3582                 $hook_data = [
3583                         'item' => $item,
3584                         'html' => $s,
3585                         'preview' => $is_preview,
3586                         'filter_reasons' => $filter_reasons
3587                 ];
3588                 Hook::callAll('prepare_body', $hook_data);
3589                 $s = $hook_data['html'];
3590                 unset($hook_data);
3591
3592                 if (!$attach) {
3593                         // Replace the blockquotes with quotes that are used in mails.
3594                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3595                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3596                         return $s;
3597                 }
3598
3599                 $as = '';
3600                 $vhead = false;
3601                 $matches = [];
3602                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3603                 foreach ($matches as $mtch) {
3604                         $mime = $mtch[3];
3605
3606                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3607
3608                         if (strpos($mime, 'video') !== false) {
3609                                 if (!$vhead) {
3610                                         $vhead = true;
3611                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3612                                 }
3613
3614                                 $url_parts = explode('/', $the_url);
3615                                 $id = end($url_parts);
3616                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3617                                         '$video' => [
3618                                                 'id'     => $id,
3619                                                 'title'  => DI::l10n()->t('View Video'),
3620                                                 'src'    => $the_url,
3621                                                 'mime'   => $mime,
3622                                         ],
3623                                 ]);
3624                         }
3625
3626                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3627                         if ($filetype) {
3628                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3629                                 $filesubtype = str_replace('.', '-', $filesubtype);
3630                         } else {
3631                                 $filetype = 'unkn';
3632                                 $filesubtype = 'unkn';
3633                         }
3634
3635                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3636                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3637
3638                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3639                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3640                 }
3641
3642                 if ($as != '') {
3643                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3644                 }
3645
3646                 // Map.
3647                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3648                         $x = Map::byCoordinates(trim($item['coord']));
3649                         if ($x) {
3650                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3651                         }
3652                 }
3653
3654                 // Replace friendica image url size with theme preference.
3655                 if (!empty($a->theme_info['item_image_size'])) {
3656                         $ps = $a->theme_info['item_image_size'];
3657                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3658                 }
3659
3660                 $s = HTML::applyContentFilter($s, $filter_reasons);
3661
3662                 $hook_data = ['item' => $item, 'html' => $s];
3663                 Hook::callAll('prepare_body_final', $hook_data);
3664
3665                 return $hook_data['html'];
3666         }
3667
3668         /**
3669          * get private link for item
3670          *
3671          * @param array $item
3672          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3673          * @throws \Exception
3674          */
3675         public static function getPlink($item)
3676         {
3677                 $a = DI::app();
3678
3679                 if ($a->user['nickname'] != "") {
3680                         $ret = [
3681                                 'href' => "display/" . $item['guid'],
3682                                 'orig' => "display/" . $item['guid'],
3683                                 'title' => DI::l10n()->t('View on separate page'),
3684                                 'orig_title' => DI::l10n()->t('view on separate page'),
3685                         ];
3686
3687                         if (!empty($item['plink'])) {
3688                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3689                                 $ret["title"] = DI::l10n()->t('link to source');
3690                         }
3691
3692                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3693                         $ret = [
3694                                 'href' => $item['plink'],
3695                                 'orig' => $item['plink'],
3696                                 'title' => DI::l10n()->t('link to source'),
3697                         ];
3698                 } else {
3699                         $ret = [];
3700                 }
3701
3702                 return $ret;
3703         }
3704
3705         /**
3706          * Is the given item array a post that is sent as starting post to a forum?
3707          *
3708          * @param array $item
3709          * @param array $owner
3710          *
3711          * @return boolean "true" when it is a forum post
3712          */
3713         public static function isForumPost(array $item, array $owner = [])
3714         {
3715                 if (empty($owner)) {
3716                         $owner = User::getOwnerDataById($item['uid']);
3717                         if (empty($owner)) {
3718                                 return false;
3719                         }
3720                 }
3721
3722                 if (($item['author-id'] == $item['owner-id']) ||
3723                         ($owner['id'] == $item['contact-id']) ||
3724                         ($item['uri'] != $item['parent-uri']) ||
3725                         $item['origin']) {
3726                         return false;
3727                 }
3728
3729                 return Contact::isForum($item['contact-id']);
3730         }
3731
3732         /**
3733          * Search item id for given URI or plink
3734          *
3735          * @param string $uri
3736          * @param integer $uid
3737          *
3738          * @return integer item id
3739          */
3740         public static function searchByLink($uri, $uid = 0)
3741         {
3742                 $ssl_uri = str_replace('http://', 'https://', $uri);
3743                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3744
3745                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3746                 if (DBA::isResult($item)) {
3747                         return $item['id'];
3748                 }
3749
3750                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3751                 if (!DBA::isResult($itemcontent)) {
3752                         return 0;
3753                 }
3754
3755                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3756                 if (!DBA::isResult($itemuri)) {
3757                         return 0;
3758                 }
3759
3760                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3761                 if (DBA::isResult($item)) {
3762                         return $item['id'];
3763                 }
3764
3765                 return 0;
3766         }
3767
3768         /**
3769          * Return the URI for a link to the post
3770          *
3771          * @param string $uri URI or link to post
3772          *
3773          * @return string URI
3774          */
3775         public static function getURIByLink(string $uri)
3776         {
3777                 $ssl_uri = str_replace('http://', 'https://', $uri);
3778                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3779
3780                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3781                 if (DBA::isResult($item)) {
3782                         return $item['uri'];
3783                 }
3784
3785                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3786                 if (!DBA::isResult($itemcontent)) {
3787                         return '';
3788                 }
3789
3790                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3791                 if (DBA::isResult($itemuri)) {
3792                         return $itemuri['uri'];
3793                 }
3794
3795                 return '';
3796         }
3797
3798         /**
3799          * Fetches item for given URI or plink
3800          *
3801          * @param string $uri
3802          * @param integer $uid
3803          *
3804          * @return integer item id
3805          */
3806         public static function fetchByLink($uri, $uid = 0)
3807         {
3808                 $item_id = self::searchByLink($uri, $uid);
3809                 if (!empty($item_id)) {
3810                         return $item_id;
3811                 }
3812
3813                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3814                         $item_id = self::searchByLink($fetched_uri, $uid);
3815                 } else {
3816                         $item_id = Diaspora::fetchByURL($uri);
3817                 }
3818
3819                 if (!empty($item_id)) {
3820                         return $item_id;
3821                 }
3822
3823                 return 0;
3824         }
3825
3826         /**
3827          * Return share data from an item array (if the item is shared item)
3828          * We are providing the complete Item array, because at some time in the future
3829          * we hopefully will define these values not in the body anymore but in some item fields.
3830          * This function is meant to replace all similar functions in the system.
3831          *
3832          * @param array $item
3833          *
3834          * @return array with share information
3835          */
3836         public static function getShareArray($item)
3837         {
3838                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3839                         return [];
3840                 }
3841
3842                 $attribute_string = $matches[2];
3843                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3844                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3845                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3846                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3847                         }
3848                 }
3849                 return $attributes;
3850         }
3851
3852         /**
3853          * Fetch item information for shared items from the original items and adds it.
3854          *
3855          * @param array $item
3856          *
3857          * @return array item array with data from the original item
3858          */
3859         public static function addShareDataFromOriginal($item)
3860         {
3861                 $shared = self::getShareArray($item);
3862                 if (empty($shared)) {
3863                         return $item;
3864                 }
3865
3866                 // Real reshares always have got a GUID.
3867                 if (empty($shared['guid'])) {
3868                         return $item;
3869                 }
3870
3871                 $uid = $item['uid'] ?? 0;
3872
3873                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3874                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3875                 if (!DBA::isResult($shared_item)) {
3876                         if (empty($shared['link'])) {
3877                                 return $item;
3878                         }
3879
3880                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3881                         $id = self::fetchByLink($shared['link'], $uid);
3882                         if (empty($id)) {
3883                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3884                                 return $item;
3885                         }
3886
3887                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3888                         if (!DBA::isResult($shared_item)) {
3889                                 return $item;
3890                         }
3891                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3892                 } else {
3893                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3894                 }
3895
3896                 if (!empty($shared_item['title'])) {
3897                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3898                         unset($shared_item['title']);
3899                 } else {
3900                         $body = $shared_item['body'];
3901                 }
3902
3903                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3904                 unset($shared_item['body']);
3905
3906                 return array_merge($item, $shared_item);
3907         }
3908 }