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