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\Protocol\OStatus;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Map;
  42 use Friendica\Util\Network;
  43 use Friendica\Util\Security;
  44 use Friendica\Util\Strings;
  45 use Friendica\Util\XML;
  46 use Friendica\Worker\Delivery;
  47 use Text_LanguageDetect;
  48 use Friendica\Repository\PermissionSet as RepPermissionSet;
  49
  50 class Item
  51 {
  52         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  53         const PT_ARTICLE = 0;
  54         const PT_NOTE = 1;
  55         const PT_PAGE = 2;
  56         const PT_IMAGE = 16;
  57         const PT_AUDIO = 17;
  58         const PT_VIDEO = 18;
  59         const PT_DOCUMENT = 19;
  60         const PT_EVENT = 32;
  61         const PT_PERSONAL_NOTE = 128;
  62
  63         // Field list that is used to display the items
  64         const DISPLAY_FIELDLIST = [
  65                 'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  66                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  67                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  68                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  69                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  70                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  71                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  72                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  73                 'writable', 'self', 'cid', 'alias', 'pinned',
  74                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  75                 'event-summary', 'event-desc', 'event-location', 'event-type',
  76                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  77                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  78         ];
  79
  80         // Field list that is used to deliver items via the protocols
  81         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  82                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  83                         'private', 'title', 'body', 'location', 'coord', 'app',
  84                         'attach', 'deleted', 'extid', 'post-type',
  85                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  86                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  87                         'signed_text', 'signature', 'signer', 'network'];
  88
  89         // Field list for "item-content" table that is mixed with the item table
  90         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  91                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  92                         'object-type', 'object', 'target-type', 'target', 'plink'];
  93
  94         // Field list for "item-content" table that is not present in the "item" table
  95         const CONTENT_FIELDLIST = ['language'];
  96
  97         // All fields in the item table
  98         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
  99                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id',
 100                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
 101                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 102                         'postopts', 'plink', 'resource-id', 'event-id', 'attach', 'inform',
 103                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 104                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 105                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 106                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 107                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 108                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 109                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
 110
 111         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 112         // The item-activity table only stores the index and needs this array to know the matching activity.
 113         const ACTIVITIES = [
 114                 Activity::LIKE, Activity::DISLIKE,
 115                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 116                 Activity::FOLLOW,
 117                 Activity::ANNOUNCE];
 118
 119         const PUBLIC = 0;
 120         const PRIVATE = 1;
 121         const UNLISTED = 2;
 122
 123         private static $legacy_mode = null;
 124
 125         public static function isLegacyMode()
 126         {
 127                 if (is_null(self::$legacy_mode)) {
 128                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 129                 }
 130
 131                 return self::$legacy_mode;
 132         }
 133
 134         /**
 135          * Set the pinned state of an item
 136          *
 137          * @param integer $iid    Item ID
 138          * @param integer $uid    User ID
 139          * @param boolean $pinned Pinned state
 140          */
 141         public static function setPinned(int $iid, int $uid, bool $pinned)
 142         {
 143                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 144         }
 145
 146         /**
 147          * Get the pinned state
 148          *
 149          * @param integer $iid Item ID
 150          * @param integer $uid User ID
 151          *
 152          * @return boolean pinned state
 153          */
 154         public static function getPinned(int $iid, int $uid)
 155         {
 156                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 157                 if (!DBA::isResult($useritem)) {
 158                         return false;
 159                 }
 160                 return (bool)$useritem['pinned'];
 161         }
 162
 163         /**
 164          * Select pinned rows from the item table for a given user
 165          *
 166          * @param integer $uid       User ID
 167          * @param array   $selected  Array of selected fields, empty for all
 168          * @param array   $condition Array of fields for condition
 169          * @param array   $params    Array of several parameters
 170          *
 171          * @return boolean|object
 172          * @throws \Exception
 173          */
 174         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 175         {
 176                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 177                 if (!DBA::isResult($useritems)) {
 178                         return $useritems;
 179                 }
 180
 181                 $pinned = [];
 182                 while ($useritem = DBA::fetch($useritems)) {
 183                         $pinned[] = $useritem['iid'];
 184                 }
 185                 DBA::close($useritems);
 186
 187                 if (empty($pinned)) {
 188                         return [];
 189                 }
 190
 191                 if (empty($condition) || !is_array($condition)) {
 192                         $condition = ['iid' => $pinned];
 193                 } else {
 194                         reset($condition);
 195                         $first_key = key($condition);
 196                         if (!is_int($first_key)) {
 197                                 $condition['iid'] = $pinned;
 198                         } else {
 199                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 200                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 201                                 $condition = array_merge($condition, $pinned);
 202                         }
 203                 }
 204
 205                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 206         }
 207
 208         /**
 209          * returns an activity index from an activity string
 210          *
 211          * @param string $activity activity string
 212          * @return integer Activity index
 213          */
 214         public static function activityToIndex($activity)
 215         {
 216                 $index = array_search($activity, self::ACTIVITIES);
 217
 218                 if (is_bool($index)) {
 219                         $index = -1;
 220                 }
 221
 222                 return $index;
 223         }
 224
 225         /**
 226          * returns an activity string from an activity index
 227          *
 228          * @param integer $index activity index
 229          * @return string Activity string
 230          */
 231         private static function indexToActivity($index)
 232         {
 233                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 234                         return '';
 235                 }
 236
 237                 return self::ACTIVITIES[$index];
 238         }
 239
 240         /**
 241          * Fetch a single item row
 242          *
 243          * @param mixed $stmt statement object
 244          * @return array current row
 245          */
 246         public static function fetch($stmt)
 247         {
 248                 $row = DBA::fetch($stmt);
 249
 250                 if (is_bool($row)) {
 251                         return $row;
 252                 }
 253
 254                 // ---------------------- Transform item structure data ----------------------
 255
 256                 // We prefer the data from the user's contact over the public one
 257                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 258                         ($row['author-link'] == $row['contact-link'])) {
 259                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 260                                 $row['author-avatar'] = $row['contact-avatar'];
 261                         }
 262                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 263                                 $row['author-name'] = $row['contact-name'];
 264                         }
 265                 }
 266
 267                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 268                         ($row['owner-link'] == $row['contact-link'])) {
 269                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 270                                 $row['owner-avatar'] = $row['contact-avatar'];
 271                         }
 272                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 273                                 $row['owner-name'] = $row['contact-name'];
 274                         }
 275                 }
 276
 277                 // We can always comment on posts from these networks
 278                 if (array_key_exists('writable', $row) &&
 279                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 280                         $row['writable'] = true;
 281                 }
 282
 283                 // ---------------------- Transform item content data ----------------------
 284
 285                 // Fetch data from the item-content table whenever there is content there
 286                 if (self::isLegacyMode()) {
 287                         $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 288                         foreach ($legacy_fields as $field) {
 289                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 290                                         $row[$field] = $row['internal-item-' . $field];
 291                                 }
 292                                 unset($row['internal-item-' . $field]);
 293                         }
 294                 }
 295
 296                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 297                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 298                         if (array_key_exists('title', $row)) {
 299                                 $row['title'] = '';
 300                         }
 301                         if (array_key_exists('body', $row)) {
 302                                 $row['body'] = $row['verb'];
 303                         }
 304                         if (array_key_exists('object', $row)) {
 305                                 $row['object'] = '';
 306                         }
 307                         if (array_key_exists('object-type', $row)) {
 308                                 $row['object-type'] = Activity\ObjectType::NOTE;
 309                         }
 310                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 311                         // Posts don't have a target - but having tags or files.
 312                         // We safe some performance by building tag and file strings only here.
 313                         // We remove the target since they aren't used for this type.
 314                         // In mail posts we do store some mail header data in the object.
 315                         if (array_key_exists('target', $row)) {
 316                                 $row['target'] = '';
 317                         }
 318                 }
 319
 320                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 321                         // Build the file string out of the term entries
 322                         if (array_key_exists('file', $row) && empty($row['file'])) {
 323                                 $row['file'] = Category::getTextByURIId($row['internal-uri-id'], $row['internal-uid']);
 324                         }
 325                 }
 326
 327                 if ($row['internal-psid'] == RepPermissionSet::PUBLIC) {
 328                         if (array_key_exists('allow_cid', $row)) {
 329                                 $row['allow_cid'] = '';
 330                         }
 331                         if (array_key_exists('allow_gid', $row)) {
 332                                 $row['allow_gid'] = '';
 333                         }
 334                         if (array_key_exists('deny_cid', $row)) {
 335                                 $row['deny_cid'] = '';
 336                         }
 337                         if (array_key_exists('deny_gid', $row)) {
 338                                 $row['deny_gid'] = '';
 339                         }
 340                 }
 341
 342                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 343                         $row['ignored'] = $row['internal-user-ignored'];
 344                 }
 345
 346                 // Remove internal fields
 347                 unset($row['internal-activity']);
 348                 unset($row['internal-network']);
 349                 unset($row['internal-uri-id']);
 350                 unset($row['internal-uid']);
 351                 unset($row['internal-psid']);
 352                 unset($row['internal-iaid']);
 353                 unset($row['internal-user-ignored']);
 354                 unset($row['interaction']);
 355
 356                 return $row;
 357         }
 358
 359         /**
 360          * Fills an array with data from an item query
 361          *
 362          * @param object $stmt statement object
 363          * @param bool   $do_close
 364          * @return array Data array
 365          */
 366         public static function inArray($stmt, $do_close = true) {
 367                 if (is_bool($stmt)) {
 368                         return $stmt;
 369                 }
 370
 371                 $data = [];
 372                 while ($row = self::fetch($stmt)) {
 373                         $data[] = $row;
 374                 }
 375                 if ($do_close) {
 376                         DBA::close($stmt);
 377                 }
 378                 return $data;
 379         }
 380
 381         /**
 382          * Check if item data exists
 383          *
 384          * @param array $condition array of fields for condition
 385          *
 386          * @return boolean Are there rows for that condition?
 387          * @throws \Exception
 388          */
 389         public static function exists($condition) {
 390                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 391
 392                 if (is_bool($stmt)) {
 393                         $retval = $stmt;
 394                 } else {
 395                         $retval = (DBA::numRows($stmt) > 0);
 396                 }
 397
 398                 DBA::close($stmt);
 399
 400                 return $retval;
 401         }
 402
 403         /**
 404          * Retrieve a single record from the item table for a given user and returns it in an associative array
 405          *
 406          * @param integer $uid User ID
 407          * @param array   $selected
 408          * @param array   $condition
 409          * @param array   $params
 410          * @return bool|array
 411          * @throws \Exception
 412          * @see   DBA::select
 413          */
 414         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 415         {
 416                 $params['uid'] = $uid;
 417
 418                 if (empty($selected)) {
 419                         $selected = Item::DISPLAY_FIELDLIST;
 420                 }
 421
 422                 return self::selectFirst($selected, $condition, $params);
 423         }
 424
 425         /**
 426          * Select rows from the item table for a given user
 427          *
 428          * @param integer $uid       User ID
 429          * @param array   $selected  Array of selected fields, empty for all
 430          * @param array   $condition Array of fields for condition
 431          * @param array   $params    Array of several parameters
 432          *
 433          * @return boolean|object
 434          * @throws \Exception
 435          */
 436         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 437         {
 438                 $params['uid'] = $uid;
 439
 440                 if (empty($selected)) {
 441                         $selected = Item::DISPLAY_FIELDLIST;
 442                 }
 443
 444                 return self::select($selected, $condition, $params);
 445         }
 446
 447         /**
 448          * Retrieve a single record from the item table and returns it in an associative array
 449          *
 450          * @param array $fields
 451          * @param array $condition
 452          * @param array $params
 453          * @return bool|array
 454          * @throws \Exception
 455          * @see   DBA::select
 456          */
 457         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 458         {
 459                 $params['limit'] = 1;
 460
 461                 $result = self::select($fields, $condition, $params);
 462
 463                 if (is_bool($result)) {
 464                         return $result;
 465                 } else {
 466                         $row = self::fetch($result);
 467                         DBA::close($result);
 468                         return $row;
 469                 }
 470         }
 471
 472         /**
 473          * Select rows from the item table and returns them as an array
 474          *
 475          * @param array $selected  Array of selected fields, empty for all
 476          * @param array $condition Array of fields for condition
 477          * @param array $params    Array of several parameters
 478          *
 479          * @return array
 480          * @throws \Exception
 481          */
 482         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 483         {
 484                 $result = self::select($fields, $condition, $params);
 485
 486                 if (is_bool($result)) {
 487                         return [];
 488                 }
 489
 490                 $data = [];
 491                 while ($row = self::fetch($result)) {
 492                         $data[] = $row;
 493                 }
 494                 DBA::close($result);
 495
 496                 return $data;
 497         }
 498
 499         /**
 500          * Select rows from the item table
 501          *
 502          * @param array $selected  Array of selected fields, empty for all
 503          * @param array $condition Array of fields for condition
 504          * @param array $params    Array of several parameters
 505          *
 506          * @return boolean|object
 507          * @throws \Exception
 508          */
 509         public static function select(array $selected = [], array $condition = [], $params = [])
 510         {
 511                 $uid = 0;
 512                 $usermode = false;
 513
 514                 if (isset($params['uid'])) {
 515                         $uid = $params['uid'];
 516                         $usermode = true;
 517                 }
 518
 519                 $fields = self::fieldlist($usermode);
 520
 521                 $select_fields = self::constructSelectFields($fields, $selected);
 522
 523                 $condition_string = DBA::buildCondition($condition);
 524
 525                 $condition_string = self::addTablesToFields($condition_string, $fields);
 526
 527                 if ($usermode) {
 528                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 529                 }
 530
 531                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 532
 533                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 534
 535                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 536
 537                 return DBA::p($sql, $condition);
 538         }
 539
 540         /**
 541          * Select rows from the starting post in the item table
 542          *
 543          * @param integer $uid       User ID
 544          * @param array   $selected
 545          * @param array   $condition Array of fields for condition
 546          * @param array   $params    Array of several parameters
 547          *
 548          * @return boolean|object
 549          * @throws \Exception
 550          */
 551         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 552         {
 553                 $params['uid'] = $uid;
 554
 555                 if (empty($selected)) {
 556                         $selected = Item::DISPLAY_FIELDLIST;
 557                 }
 558
 559                 return self::selectThread($selected, $condition, $params);
 560         }
 561
 562         /**
 563          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 564          *
 565          * @param integer $uid User ID
 566          * @param array   $selected
 567          * @param array   $condition
 568          * @param array   $params
 569          * @return bool|array
 570          * @throws \Exception
 571          * @see   DBA::select
 572          */
 573         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 574         {
 575                 $params['uid'] = $uid;
 576
 577                 if (empty($selected)) {
 578                         $selected = Item::DISPLAY_FIELDLIST;
 579                 }
 580
 581                 return self::selectFirstThread($selected, $condition, $params);
 582         }
 583
 584         /**
 585          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 586          *
 587          * @param array $fields
 588          * @param array $condition
 589          * @param array $params
 590          * @return bool|array
 591          * @throws \Exception
 592          * @see   DBA::select
 593          */
 594         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 595         {
 596                 $params['limit'] = 1;
 597                 $result = self::selectThread($fields, $condition, $params);
 598
 599                 if (is_bool($result)) {
 600                         return $result;
 601                 } else {
 602                         $row = self::fetch($result);
 603                         DBA::close($result);
 604                         return $row;
 605                 }
 606         }
 607
 608         /**
 609          * Select rows from the starting post in the item table
 610          *
 611          * @param array $selected  Array of selected fields, empty for all
 612          * @param array $condition Array of fields for condition
 613          * @param array $params    Array of several parameters
 614          *
 615          * @return boolean|object
 616          * @throws \Exception
 617          */
 618         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 619         {
 620                 $uid = 0;
 621                 $usermode = false;
 622
 623                 if (isset($params['uid'])) {
 624                         $uid = $params['uid'];
 625                         $usermode = true;
 626                 }
 627
 628                 $fields = self::fieldlist($usermode);
 629
 630                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 631
 632                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 633                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 634                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 635                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 636
 637                 $select_fields = self::constructSelectFields($fields, $selected);
 638
 639                 $condition_string = DBA::buildCondition($condition);
 640
 641                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 642                 $condition_string = self::addTablesToFields($condition_string, $fields);
 643
 644                 if ($usermode) {
 645                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 646                 }
 647
 648                 $param_string = DBA::buildParameter($params);
 649                 $param_string = self::addTablesToFields($param_string, $threadfields);
 650                 $param_string = self::addTablesToFields($param_string, $fields);
 651
 652                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 653
 654                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 655
 656                 return DBA::p($sql, $condition);
 657         }
 658
 659         /**
 660          * Returns a list of fields that are associated with the item table
 661          *
 662          * @param $usermode
 663          * @return array field list
 664          */
 665         private static function fieldlist($usermode)
 666         {
 667                 $fields = [];
 668
 669                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 670                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id',
 671                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 672                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 673                         'resource-id', 'event-id', 'attach', 'post-type', 'file',
 674                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 675                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 676                         'id' => 'item_id', 'network', 'icid', 'iaid',
 677                         'uri-id' => 'internal-uri-id', 'uid' => 'internal-uid',
 678                         'network' => 'internal-network', 'iaid' => 'internal-iaid', 'psid' => 'internal-psid'];
 679
 680                 if ($usermode) {
 681                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 682                 }
 683
 684                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 685
 686                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 687
 688                 $fields['post-delivery-data'] = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, Post\DeliveryData::FIELD_LIST);
 689
 690                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 691
 692                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 693                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 694
 695                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 696                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 697
 698                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 699                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 700                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 701
 702                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 703
 704                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 705
 706                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 707                         'start' => 'event-start','finish' => 'event-finish',
 708                         'summary' => 'event-summary','desc' => 'event-desc',
 709                         'location' => 'event-location', 'type' => 'event-type',
 710                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 711                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 712
 713                 $fields['diaspora-interaction'] = ['interaction', 'interaction' => 'signed_text'];
 714
 715                 return $fields;
 716         }
 717
 718         /**
 719          * Returns SQL condition for the "select" functions
 720          *
 721          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 722          *
 723          * @return string SQL condition
 724          */
 725         private static function condition($thread_mode)
 726         {
 727                 if ($thread_mode) {
 728                         $master_table = "`thread`";
 729                 } else {
 730                         $master_table = "`item`";
 731                 }
 732                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 733                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 734                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 735                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 736                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 737                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 738                         GRAVITY_PARENT, GRAVITY_PARENT);
 739         }
 740
 741         /**
 742          * Returns all needed "JOIN" commands for the "select" functions
 743          *
 744          * @param integer $uid          User ID
 745          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 746          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 747          *
 748          * @param         $user_mode
 749          * @return string The SQL joins for the "select" functions
 750          */
 751         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 752         {
 753                 if ($thread_mode) {
 754                         $master_table = "`thread`";
 755                         $master_table_key = "`thread`.`iid`";
 756                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 757                 } else {
 758                         $master_table = "`item`";
 759                         $master_table_key = "`item`.`id`";
 760                         $joins = '';
 761                 }
 762
 763                 if ($user_mode) {
 764                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 765                                 AND NOT `contact`.`blocked`
 766                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 767                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 768                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 769                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 770                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 771                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 772                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 773                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 774                 } else {
 775                         if (strpos($sql_commands, "`contact`.") !== false) {
 776                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 777                         }
 778                         if (strpos($sql_commands, "`author`.") !== false) {
 779                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 780                         }
 781                         if (strpos($sql_commands, "`owner`.") !== false) {
 782                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 783                         }
 784                 }
 785
 786                 if (strpos($sql_commands, "`group_member`.") !== false) {
 787                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 788                 }
 789
 790                 if (strpos($sql_commands, "`user`.") !== false) {
 791                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 792                 }
 793
 794                 if (strpos($sql_commands, "`event`.") !== false) {
 795                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 796                 }
 797
 798                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 799                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 800                 }
 801
 802                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 803                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 804                 }
 805
 806                 if (strpos($sql_commands, "`item-content`.") !== false) {
 807                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 808                 }
 809
 810                 if (strpos($sql_commands, "`post-delivery-data`.") !== false) {
 811                         $joins .= " LEFT JOIN `post-delivery-data` ON `post-delivery-data`.`uri-id` = `item`.`uri-id` AND `item`.`origin`";
 812                 }
 813
 814                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 815                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 816                 }
 817
 818                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 819                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 820                 }
 821
 822                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 823                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 824                 }
 825
 826                 return $joins;
 827         }
 828
 829         /**
 830          * Add the field list for the "select" functions
 831          *
 832          * @param array $fields The field definition array
 833          * @param array $selected The array with the selected fields from the "select" functions
 834          *
 835          * @return string The field list
 836          */
 837         private static function constructSelectFields(array $fields, array $selected)
 838         {
 839                 if (!empty($selected)) {
 840                         $selected = array_merge($selected, ['internal-uri-id', 'internal-uid', 'internal-psid', 'internal-iaid', 'internal-network']);
 841                 }
 842
 843                 if (in_array('verb', $selected)) {
 844                         $selected[] = 'internal-activity';
 845                 }
 846
 847                 if (in_array('ignored', $selected)) {
 848                         $selected[] = 'internal-user-ignored';
 849                 }
 850
 851                 $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 852
 853                 $selection = [];
 854                 foreach ($fields as $table => $table_fields) {
 855                         foreach ($table_fields as $field => $select) {
 856                                 if (empty($selected) || in_array($select, $selected)) {
 857                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 858                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 859                                         }
 860                                         if (is_int($field)) {
 861                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 862                                         } else {
 863                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 864                                         }
 865                                 }
 866                         }
 867                 }
 868                 return implode(", ", $selection);
 869         }
 870
 871         /**
 872          * add table definition to fields in an SQL query
 873          *
 874          * @param string $query SQL query
 875          * @param array $fields The field definition array
 876          *
 877          * @return string the changed SQL query
 878          */
 879         private static function addTablesToFields($query, $fields)
 880         {
 881                 foreach ($fields as $table => $table_fields) {
 882                         foreach ($table_fields as $alias => $field) {
 883                                 if (is_int($alias)) {
 884                                         $replace_field = $field;
 885                                 } else {
 886                                         $replace_field = $alias;
 887                                 }
 888
 889                                 $search = "/([^\.])`" . $field . "`/i";
 890                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 891                                 $query = preg_replace($search, $replace, $query);
 892                         }
 893                 }
 894                 return $query;
 895         }
 896
 897         /**
 898          * Update existing item entries
 899          *
 900          * @param array $fields    The fields that are to be changed
 901          * @param array $condition The condition for finding the item entries
 902          *
 903          * In the future we may have to change permissions as well.
 904          * Then we had to add the user id as third parameter.
 905          *
 906          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 907          *
 908          * @return integer|boolean number of affected rows - or "false" if there was an error
 909          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 910          */
 911         public static function update(array $fields, array $condition)
 912         {
 913                 if (empty($condition) || empty($fields)) {
 914                         return false;
 915                 }
 916
 917                 // To ensure the data integrity we do it in an transaction
 918                 DBA::transaction();
 919
 920                 // We cannot simply expand the condition to check for origin entries
 921                 // The condition needn't to be a simple array but could be a complex condition.
 922                 // And we have to execute this query before the update to ensure to fetch the same data.
 923                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'uid', 'file'], $condition);
 924
 925                 $content_fields = [];
 926                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 927                         if (isset($fields[$field])) {
 928                                 $content_fields[$field] = $fields[$field];
 929                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 930                                         unset($fields[$field]);
 931                                 } else {
 932                                         $fields[$field] = null;
 933                                 }
 934                         }
 935                 }
 936
 937                 $delivery_data = Post\DeliveryData::extractFields($fields);
 938
 939                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 940                 foreach ($clear_fields as $field) {
 941                         if (array_key_exists($field, $fields)) {
 942                                 $fields[$field] = null;
 943                         }
 944                 }
 945
 946                 if (array_key_exists('file', $fields)) {
 947                         $files = $fields['file'];
 948                         $fields['file'] = null;
 949                 } else {
 950                         $files = null;
 951                 }
 952
 953                 if (!empty($fields)) {
 954                         $success = DBA::update('item', $fields, $condition);
 955
 956                         if (!$success) {
 957                                 DBA::close($items);
 958                                 DBA::rollback();
 959                                 return false;
 960                         }
 961                 }
 962
 963                 // When there is no content for the "old" item table, this will count the fetched items
 964                 $rows = DBA::affectedRows();
 965
 966                 $notify_items = [];
 967
 968                 while ($item = DBA::fetch($items)) {
 969                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 970                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 971
 972                                 if (empty($item['iaid'])) {
 973                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 974                                         if (DBA::isResult($item_activity)) {
 975                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 976                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 977                                                         if (self::isLegacyMode()) {
 978                                                                 $item_fields[$field] = null;
 979                                                         } else {
 980                                                                 unset($item_fields[$field]);
 981                                                         }
 982                                                 }
 983                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 984
 985                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 986                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 987                                                 }
 988                                         }
 989                                 } elseif (!empty($item['icid'])) {
 990                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 991
 992                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 993                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 994                                         }
 995                                 }
 996                         } else {
 997                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 998
 999                                 if (empty($item['icid'])) {
1000                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
1001                                         if (DBA::isResult($item_content)) {
1002                                                 $item_fields = ['icid' => $item_content['id']];
1003                                                 // Clear all fields in the item table that have a content in the item-content table
1004                                                 foreach ($item_content as $field => $content) {
1005                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1006                                                                 if (self::isLegacyMode()) {
1007                                                                         $item_fields[$field] = null;
1008                                                                 } else {
1009                                                                         unset($item_fields[$field]);
1010                                                                 }
1011                                                         }
1012                                                 }
1013                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1014                                         }
1015                                 }
1016                         }
1017
1018                         if (!is_null($files)) {
1019                                 Category::storeTextByURIId($item['uri-id'], $item['uid'], $files);
1020                                 if (!empty($item['file'])) {
1021                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1022                                 }
1023                         }
1024
1025                         Post\DeliveryData::update($item['uri-id'], $delivery_data);
1026
1027                         self::updateThread($item['id']);
1028
1029                         // We only need to notfiy others when it is an original entry from us.
1030                         // Only call the notifier when the item has some content relevant change.
1031                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1032                                 $notify_items[] = $item['id'];
1033                         }
1034                 }
1035
1036                 DBA::close($items);
1037                 DBA::commit();
1038
1039                 foreach ($notify_items as $notify_item) {
1040                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1041                 }
1042
1043                 return $rows;
1044         }
1045
1046         /**
1047          * Delete an item and notify others about it - if it was ours
1048          *
1049          * @param array   $condition The condition for finding the item entries
1050          * @param integer $priority  Priority for the notification
1051          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1052          */
1053         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
1054         {
1055                 $items = self::select(['id'], $condition);
1056                 while ($item = self::fetch($items)) {
1057                         self::markForDeletionById($item['id'], $priority);
1058                 }
1059                 DBA::close($items);
1060         }
1061
1062         /**
1063          * Delete an item for an user and notify others about it - if it was ours
1064          *
1065          * @param array   $condition The condition for finding the item entries
1066          * @param integer $uid       User who wants to delete this item
1067          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1068          */
1069         public static function deleteForUser($condition, $uid)
1070         {
1071                 if ($uid == 0) {
1072                         return;
1073                 }
1074
1075                 $items = self::select(['id', 'uid'], $condition);
1076                 while ($item = self::fetch($items)) {
1077                         // "Deleting" global items just means hiding them
1078                         if ($item['uid'] == 0) {
1079                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1080
1081                                 // Delete notifications
1082                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1083                         } elseif ($item['uid'] == $uid) {
1084                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
1085                         } else {
1086                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1087                         }
1088                 }
1089                 DBA::close($items);
1090         }
1091
1092         /**
1093          * Mark an item for deletion, delete related data and notify others about it - if it was ours
1094          *
1095          * @param integer $item_id
1096          * @param integer $priority Priority for the notification
1097          *
1098          * @return boolean success
1099          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1100          */
1101         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
1102         {
1103                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
1104                 // locate item to be deleted
1105                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri', 'origin',
1106                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1107                         'verb', 'object-type', 'object', 'target', 'contact-id',
1108                         'icid', 'iaid', 'psid'];
1109                 $item = self::selectFirst($fields, ['id' => $item_id]);
1110                 if (!DBA::isResult($item)) {
1111                         Logger::info('Item not found.', ['id' => $item_id]);
1112                         return false;
1113                 }
1114
1115                 if ($item['deleted']) {
1116                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1117                         return false;
1118                 }
1119
1120                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1121                 if (!DBA::isResult($parent)) {
1122                         $parent = ['origin' => false];
1123                 }
1124
1125                 // clean up categories and tags so they don't end up as orphans
1126
1127                 $matches = false;
1128                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1129
1130                 if ($cnt) {
1131                         foreach ($matches as $mtch) {
1132                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1133                         }
1134                 }
1135
1136                 $matches = false;
1137
1138                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1139
1140                 if ($cnt) {
1141                         foreach ($matches as $mtch) {
1142                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1143                         }
1144                 }
1145
1146                 /*
1147                  * If item is a link to a photo resource, nuke all the associated photos
1148                  * (visitors will not have photo resources)
1149                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1150                  * generate a resource-id and therefore aren't intimately linked to the item.
1151                  */
1152                 /// @TODO: this should first check if photo is used elsewhere
1153                 if (strlen($item['resource-id'])) {
1154                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1155                 }
1156
1157                 // If item is a link to an event, delete the event.
1158                 if (intval($item['event-id'])) {
1159                         Event::delete($item['event-id']);
1160                 }
1161
1162                 // If item has attachments, drop them
1163                 /// @TODO: this should first check if attachment is used elsewhere
1164                 foreach (explode(",", $item['attach']) as $attach) {
1165                         preg_match("|attach/(\d+)|", $attach, $matches);
1166                         if (is_array($matches) && count($matches) > 1) {
1167                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1168                         }
1169                 }
1170
1171                 // Delete notifications
1172                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1173
1174                 // Set the item to "deleted"
1175                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1176                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1177
1178                 Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
1179                 self::deleteThread($item['id'], $item['parent-uri']);
1180
1181                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1182                         self::markForDeletion(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1183                 }
1184
1185                 Post\DeliveryData::delete($item['uri-id']);
1186
1187                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1188
1189                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1190                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1191                 }
1192                 // When the permission set will be used in photo and events as well,
1193                 // this query here needs to be extended.
1194                 // @todo Currently deactivated. We need the permission set in the deletion process.
1195                 // This is a reminder to add the removal somewhere else.
1196                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1197                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1198                 //}
1199
1200                 // If it's the parent of a comment thread, kill all the kids
1201                 if ($item['id'] == $item['parent']) {
1202                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1203                 }
1204
1205                 // Is it our comment and/or our thread?
1206                 if ($item['origin'] || $parent['origin']) {
1207                         // When we delete the original post we will delete all existing copies on the server as well
1208                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1209
1210                         // send the notification upstream/downstream
1211                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1212                 } elseif ($item['uid'] != 0) {
1213
1214                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1215                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1216                         if (DBA::isResult($global_item)) {
1217                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1218                         }
1219                 }
1220
1221                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1222
1223                 return true;
1224         }
1225
1226
1227         private static function guid($item, $notify)
1228         {
1229                 if (!empty($item['guid'])) {
1230                         return Strings::escapeTags(trim($item['guid']));
1231                 }
1232
1233                 if ($notify) {
1234                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1235                         // We add the hash of our own host because our host is the original creator of the post.
1236                         $prefix_host = DI::baseUrl()->getHostname();
1237                 } else {
1238                         $prefix_host = '';
1239
1240                         // We are only storing the post so we create a GUID from the original hostname.
1241                         if (!empty($item['author-link'])) {
1242                                 $parsed = parse_url($item['author-link']);
1243                                 if (!empty($parsed['host'])) {
1244                                         $prefix_host = $parsed['host'];
1245                                 }
1246                         }
1247
1248                         if (empty($prefix_host) && !empty($item['plink'])) {
1249                                 $parsed = parse_url($item['plink']);
1250                                 if (!empty($parsed['host'])) {
1251                                         $prefix_host = $parsed['host'];
1252                                 }
1253                         }
1254
1255                         if (empty($prefix_host) && !empty($item['uri'])) {
1256                                 $parsed = parse_url($item['uri']);
1257                                 if (!empty($parsed['host'])) {
1258                                         $prefix_host = $parsed['host'];
1259                                 }
1260                         }
1261
1262                         // Is it in the format data@host.tld? - Used for mail contacts
1263                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1264                                 $mailparts = explode('@', $item['author-link']);
1265                                 $prefix_host = array_pop($mailparts);
1266                         }
1267                 }
1268
1269                 if (!empty($item['plink'])) {
1270                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1271                 } elseif (!empty($item['uri'])) {
1272                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1273                 } else {
1274                         $guid = System::createUUID(hash('crc32', $prefix_host));
1275                 }
1276
1277                 return $guid;
1278         }
1279
1280         private static function contactId($item)
1281         {
1282                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1283                         return $item['contact-id'];
1284                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1285                         return $item['contact-id'];
1286                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1287                         return $item['author-id'];
1288                 } elseif (!empty($item['contact-id'])) {
1289                         return $item['contact-id'];
1290                 } else {
1291                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1292                         if (!empty($contact_id)) {
1293                                 return $contact_id;
1294                         }
1295                 }
1296                 return $item['author-id'];
1297         }
1298
1299         // This function will finally cover most of the preparation functionality in mod/item.php
1300         public static function prepare(&$item)
1301         {
1302                 /*
1303                  * @TODO: Unused code triggering inspection errors
1304                  *
1305                 $data = BBCode::getAttachmentData($item['body']);
1306                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1307                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1308                         $posttype = Item::PT_PAGE;
1309                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1310                 }
1311                  */
1312         }
1313
1314         /**
1315          * Write an item array into a spool file to be inserted later.
1316          * This command is called whenever there are issues storing an item.
1317          *
1318          * @param array $item The item fields that are to be inserted
1319          * @throws \Exception
1320          */
1321         private static function spool($orig_item)
1322         {
1323                 // Now we store the data in the spool directory
1324                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1325                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1326
1327                 $spoolpath = get_spoolpath();
1328                 if ($spoolpath != "") {
1329                         $spool = $spoolpath . '/' . $file;
1330
1331                         file_put_contents($spool, json_encode($orig_item));
1332                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1333                 }
1334         }
1335
1336         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1337         {
1338                 $orig_item = $item;
1339
1340                 $priority = PRIORITY_HIGH;
1341
1342                 // If it is a posting where users should get notifications, then define it as wall posting
1343                 if ($notify) {
1344                         $item['wall'] = 1;
1345                         $item['origin'] = 1;
1346                         $item['network'] = Protocol::DFRN;
1347                         $item['protocol'] = Conversation::PARCEL_DFRN;
1348
1349                         if (is_int($notify)) {
1350                                 $priority = $notify;
1351                         }
1352                 } else {
1353                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1354                 }
1355
1356                 $item['guid'] = self::guid($item, $notify);
1357                 $item['uri'] = substr(Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']))), 0, 255);
1358
1359                 // Store URI data
1360                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1361
1362                 // Store conversation data
1363                 $item = Conversation::insert($item);
1364
1365                 /*
1366                  * If a Diaspora signature structure was passed in, pull it out of the
1367                  * item array and set it aside for later storage.
1368                  */
1369
1370                 $dsprsig = null;
1371                 if (isset($item['dsprsig'])) {
1372                         $encoded_signature = $item['dsprsig'];
1373                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1374                         unset($item['dsprsig']);
1375                 }
1376
1377                 $diaspora_signed_text = '';
1378                 if (isset($item['diaspora_signed_text'])) {
1379                         $diaspora_signed_text = $item['diaspora_signed_text'];
1380                         unset($item['diaspora_signed_text']);
1381                 }
1382
1383                 // Converting the plink
1384                 /// @TODO Check if this is really still needed
1385                 if ($item['network'] == Protocol::OSTATUS) {
1386                         if (isset($item['plink'])) {
1387                                 $item['plink'] = OStatus::convertHref($item['plink']);
1388                         } elseif (isset($item['uri'])) {
1389                                 $item['plink'] = OStatus::convertHref($item['uri']);
1390                         }
1391                 }
1392
1393                 if (!empty($item['thr-parent'])) {
1394                         $item['parent-uri'] = $item['thr-parent'];
1395                 }
1396
1397                 $activity = DI::activity();
1398
1399                 if (isset($item['gravity'])) {
1400                         $item['gravity'] = intval($item['gravity']);
1401                 } elseif ($item['parent-uri'] === $item['uri']) {
1402                         $item['gravity'] = GRAVITY_PARENT;
1403                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1404                         $item['gravity'] = GRAVITY_COMMENT;
1405                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1406                         $item['gravity'] = GRAVITY_ACTIVITY;
1407                 } else {
1408                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1409                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1410                 }
1411
1412                 $uid = intval($item['uid']);
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' => $uid]);
1418                 if (DBA::isResult($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' => $item
1430                                 ]);
1431                                 return 0;
1432                         }
1433                 }
1434
1435                 /*
1436                  * Do we already have this item?
1437                  * We have to check several networks since Friendica posts could be repeated
1438                  * via OStatus (maybe Diasporsa as well)
1439                  */
1440                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1441                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1442                                 trim($item['uri']), $item['uid'],
1443                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1444                         $existing = self::selectFirst(['id', 'network'], $condition);
1445                         if (DBA::isResult($existing)) {
1446                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1447                                 if ($uid != 0) {
1448                                         Logger::notice('Item already existed for user', [
1449                                                 'uri' => $item['uri'],
1450                                                 'uid' => $uid,
1451                                                 'network' => $item['network'],
1452                                                 'existing_id' => $existing["id"],
1453                                                 'existing_network' => $existing["network"]
1454                                         ]);
1455                                 }
1456
1457                                 return $existing["id"];
1458                         }
1459                 }
1460
1461                 $item['wall']          = intval($item['wall'] ?? 0);
1462                 $item['extid']         = trim($item['extid'] ?? '');
1463                 $item['author-name']   = trim($item['author-name'] ?? '');
1464                 $item['author-link']   = trim($item['author-link'] ?? '');
1465                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1466                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1467                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1468                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1469                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1470                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1471                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1472                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1473                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1474                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
1475                 $item['location']      = trim($item['location'] ?? '');
1476                 $item['coord']         = trim($item['coord'] ?? '');
1477                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1478                 $item['deleted']       = 0;
1479                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1480                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1481                 $item['verb']          = trim($item['verb'] ?? '');
1482                 $item['object-type']   = trim($item['object-type'] ?? '');
1483                 $item['object']        = trim($item['object'] ?? '');
1484                 $item['target-type']   = trim($item['target-type'] ?? '');
1485                 $item['target']        = trim($item['target'] ?? '');
1486                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
1487                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1488                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1489                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1490                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1491                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1492                 $item['body']          = trim($item['body'] ?? '');
1493                 $item['attach']        = trim($item['attach'] ?? '');
1494                 $item['app']           = trim($item['app'] ?? '');
1495                 $item['origin']        = intval($item['origin'] ?? 0);
1496                 $item['postopts']      = trim($item['postopts'] ?? '');
1497                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1498                 $item['event-id']      = intval($item['event-id'] ?? 0);
1499                 $item['inform']        = trim($item['inform'] ?? '');
1500                 $item['file']          = trim($item['file'] ?? '');
1501
1502                 // When there is no content then we don't post it
1503                 if ($item['body'].$item['title'] == '') {
1504                         Logger::notice('No body, no title.');
1505                         return 0;
1506                 }
1507
1508                 self::addLanguageToItemArray($item);
1509
1510                 // Items cannot be stored before they happen ...
1511                 if ($item['created'] > DateTimeFormat::utcNow()) {
1512                         $item['created'] = DateTimeFormat::utcNow();
1513                 }
1514
1515                 // We haven't invented time travel by now.
1516                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1517                         $item['edited'] = DateTimeFormat::utcNow();
1518                 }
1519
1520                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1521
1522                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1523                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1524
1525                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1526
1527                 if (Contact::isBlocked($item['author-id'])) {
1528                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1529                         return 0;
1530                 }
1531
1532                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1533                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1534                         return 0;
1535                 }
1536
1537                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1538                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1539                         return 0;
1540                 }
1541
1542                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1543                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1544
1545                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1546
1547                 if (Contact::isBlocked($item['owner-id'])) {
1548                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1549                         return 0;
1550                 }
1551
1552                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1553                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1554                         return 0;
1555                 }
1556
1557                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1558                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1559                         return 0;
1560                 }
1561
1562                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1563                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1564                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1565                         return 0;
1566                 }
1567
1568                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1569                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1570                         return 0;
1571                 }
1572
1573                 // We don't store the causer, we only have it here for the checks above
1574                 unset($item['causer-id']);
1575                 unset($item['causer-link']);
1576
1577                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1578                 $item["contact-id"] = self::contactId($item);
1579
1580                 if ($item['network'] == Protocol::PHANTOM) {
1581                         $item['network'] = Protocol::DFRN;
1582                         Logger::notice('Missing network, setting to {network}.', [
1583                                 'uri' => $item["uri"],
1584                                 'network' => $item['network'],
1585                                 'callstack' => System::callstack()
1586                         ]);
1587                 }
1588
1589                 // Checking if there is already an item with the same guid
1590                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1591                 if (self::exists($condition)) {
1592                         Logger::notice('Found already existing item', [
1593                                 'guid' => $item['guid'],
1594                                 'uid' => $item['uid'],
1595                                 'network' => $item['network']
1596                         ]);
1597                         return 0;
1598                 }
1599
1600                 if ($item['verb'] == Activity::FOLLOW) {
1601                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1602                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1603                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1604                                 return 0;
1605                         }
1606
1607                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1608                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1609                         if (self::exists($condition)) {
1610                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1611                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1612                                 return 0;
1613                         }
1614                 }
1615
1616                 // Check for hashtags in the body and repair or add hashtag links
1617                 self::setHashtags($item);
1618
1619                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1620                 if (!Tag::existsForPost($item['uri-id'])) {
1621                         Tag::storeFromBody($item['uri-id'], $item['body']);
1622                 }
1623
1624                 $item['thr-parent'] = $item['parent-uri'];
1625
1626                 $notify_type = Delivery::POST;
1627                 $allow_cid = '';
1628                 $allow_gid = '';
1629                 $deny_cid  = '';
1630                 $deny_gid  = '';
1631
1632                 if ($item['parent-uri'] === $item['uri']) {
1633                         $parent_id = 0;
1634                         $parent_deleted = 0;
1635                         $allow_cid = $item['allow_cid'];
1636                         $allow_gid = $item['allow_gid'];
1637                         $deny_cid  = $item['deny_cid'];
1638                         $deny_gid  = $item['deny_gid'];
1639                 } else {
1640                         // find the parent and snarf the item id and ACLs
1641                         // and anything else we need to inherit
1642
1643                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1644                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1645                                 'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1646                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1647                         $params = ['order' => ['id' => false]];
1648                         $parent = self::selectFirst($fields, $condition, $params);
1649
1650                         if (DBA::isResult($parent)) {
1651                                 // is the new message multi-level threaded?
1652                                 // even though we don't support it now, preserve the info
1653                                 // and re-attach to the conversation parent.
1654
1655                                 if ($parent['uri'] != $parent['parent-uri']) {
1656                                         $item['parent-uri'] = $parent['parent-uri'];
1657
1658                                         $condition = ['uri' => $item['parent-uri'],
1659                                                 'parent-uri' => $item['parent-uri'],
1660                                                 'uid' => $item['uid']];
1661                                         $params = ['order' => ['id' => false]];
1662                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1663
1664                                         if (DBA::isResult($toplevel_parent)) {
1665                                                 $parent = $toplevel_parent;
1666                                         }
1667                                 }
1668
1669                                 $parent_id      = $parent['id'];
1670                                 $parent_deleted = $parent['deleted'];
1671                                 $allow_cid      = $parent['allow_cid'];
1672                                 $allow_gid      = $parent['allow_gid'];
1673                                 $deny_cid       = $parent['deny_cid'];
1674                                 $deny_gid       = $parent['deny_gid'];
1675                                 $item['wall']   = $parent['wall'];
1676
1677                                 /*
1678                                  * If the parent is private, force privacy for the entire conversation
1679                                  * This differs from the above settings as it subtly allows comments from
1680                                  * email correspondents to be private even if the overall thread is not.
1681                                  */
1682                                 if ($parent['private']) {
1683                                         $item['private'] = $parent['private'];
1684                                 }
1685
1686                                 /*
1687                                  * Edge case. We host a public forum that was originally posted to privately.
1688                                  * The original author commented, but as this is a comment, the permissions
1689                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1690                                  */
1691                                 if ((intval($parent['forum_mode']) == 1) && ($parent['private'] != self::PUBLIC)) {
1692                                         $item['private'] = self::PUBLIC;
1693                                 }
1694
1695                                 // If its a post that originated here then tag the thread as "mention"
1696                                 if ($item['origin'] && $item['uid']) {
1697                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1698                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1699                                 }
1700
1701                                 // Update the contact relations
1702                                 if ($item['author-id'] != $parent['author-id']) {
1703                                         DBA::update('contact-relation', ['last-interaction' => $item['created']], ['cid' => $parent['author-id'], 'relation-cid' => $item['author-id']], true);
1704                                 }
1705                         } else {
1706                                 /*
1707                                  * Allow one to see reply tweets from status.net even when
1708                                  * we don't have or can't see the original post.
1709                                  */
1710                                 if ($force_parent) {
1711                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1712                                         $parent_id = 0;
1713                                         $item['parent-uri'] = $item['uri'];
1714                                         $item['gravity'] = GRAVITY_PARENT;
1715                                 } else {
1716                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1717                                         return 0;
1718                                 }
1719
1720                                 $parent_deleted = 0;
1721                         }
1722                 }
1723
1724                 if (stristr($item['verb'], Activity::POKE)) {
1725                         $notify_type = Delivery::POKE;
1726                 }
1727
1728                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1729                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1730
1731                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1732                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1733                 if (self::exists($condition)) {
1734                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1735                         return 0;
1736                 }
1737
1738                 // On Friendica and Diaspora the GUID is unique
1739                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1740                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1741                         if (self::exists($condition)) {
1742                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1743                                 return 0;
1744                         }
1745                 } elseif ($item['network'] == Protocol::OSTATUS) {
1746                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1747                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1748                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1749                         if (self::exists($condition)) {
1750                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1751                                 return 0;
1752                         }
1753                 }
1754
1755                 // Is this item available in the global items (with uid=0)?
1756                 if ($item["uid"] == 0) {
1757                         $item["global"] = true;
1758
1759                         // Set the global flag on all items if this was a global item entry
1760                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1761                 } else {
1762                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1763                 }
1764
1765                 // ACL settings
1766                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1767                         $private = self::PRIVATE;
1768                 } else {
1769                         $private = $item['private'];
1770                 }
1771
1772                 $item["allow_cid"] = $allow_cid;
1773                 $item["allow_gid"] = $allow_gid;
1774                 $item["deny_cid"] = $deny_cid;
1775                 $item["deny_gid"] = $deny_gid;
1776                 $item["private"] = $private;
1777                 $item["deleted"] = $parent_deleted;
1778
1779                 // Fill the cache field
1780                 self::putInCache($item);
1781
1782                 if ($notify) {
1783                         $item['edit'] = false;
1784                         $item['parent'] = $parent_id;
1785                         Hook::callAll('post_local', $item);
1786                         unset($item['edit']);
1787                         unset($item['parent']);
1788                 } else {
1789                         Hook::callAll('post_remote', $item);
1790                 }
1791
1792                 // This array field is used to trigger some automatic reactions
1793                 // It is mainly used in the "post_local" hook.
1794                 unset($item['api_source']);
1795
1796                 if (!empty($item['cancel'])) {
1797                         Logger::log('post cancelled by addon.');
1798                         return 0;
1799                 }
1800
1801                 /*
1802                  * Check for already added items.
1803                  * There is a timing issue here that sometimes creates double postings.
1804                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1805                  */
1806                 if ($item["uid"] == 0) {
1807                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1808                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1809                                 return 0;
1810                         }
1811                 }
1812
1813                 Logger::log('' . print_r($item,true), Logger::DATA);
1814
1815                 if (array_key_exists('file', $item)) {
1816                         $files = $item['file'];
1817                         unset($item['file']);
1818                 } else {
1819                         $files = '';
1820                 }
1821
1822                 // Creates or assigns the permission set
1823                 $item['psid'] = PermissionSet::getIdFromACL(
1824                         $item['uid'],
1825                         $item['allow_cid'],
1826                         $item['allow_gid'],
1827                         $item['deny_cid'],
1828                         $item['deny_gid']
1829                 );
1830
1831                 $item['allow_cid'] = null;
1832                 $item['allow_gid'] = null;
1833                 $item['deny_cid'] = null;
1834                 $item['deny_gid'] = null;
1835
1836                 // We are doing this outside of the transaction to avoid timing problems
1837                 if (!self::insertActivity($item)) {
1838                         self::insertContent($item);
1839                 }
1840
1841                 $delivery_data = Post\DeliveryData::extractFields($item);
1842
1843                 unset($item['postopts']);
1844                 unset($item['inform']);
1845
1846                 // These fields aren't stored anymore in the item table, they are fetched upon request
1847                 unset($item['author-link']);
1848                 unset($item['author-name']);
1849                 unset($item['author-avatar']);
1850                 unset($item['author-network']);
1851
1852                 unset($item['owner-link']);
1853                 unset($item['owner-name']);
1854                 unset($item['owner-avatar']);
1855
1856                 $like_no_comment = DI::config()->get('system', 'like_no_comment');
1857
1858                 DBA::transaction();
1859                 $ret = DBA::insert('item', $item);
1860
1861                 // When the item was successfully stored we fetch the ID of the item.
1862                 if (DBA::isResult($ret)) {
1863                         $current_post = DBA::lastInsertId();
1864                 } else {
1865                         // This can happen - for example - if there are locking timeouts.
1866                         DBA::rollback();
1867
1868                         // Store the data into a spool file so that we can try again later.
1869                         self::spool($orig_item);
1870                         return 0;
1871                 }
1872
1873                 if ($current_post == 0) {
1874                         // This is one of these error messages that never should occur.
1875                         Logger::log("couldn't find created item - we better quit now.");
1876                         DBA::rollback();
1877                         return 0;
1878                 }
1879
1880                 // How much entries have we created?
1881                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1882                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1883
1884                 if ($entries > 1) {
1885                         // There are duplicates. We delete our just created entry.
1886                         Logger::info('Delete duplicated item', ['id' => $current_post, 'uri' => $item['uri'], 'uid' => $item['uid'], 'guid' => $item['guid']]);
1887
1888                         // Yes, we could do a rollback here - but we possibly are still having users with MyISAM.
1889                         DBA::delete('item', ['id' => $current_post]);
1890                         DBA::commit();
1891                         return 0;
1892                 } elseif ($entries == 0) {
1893                         // This really should never happen since we quit earlier if there were problems.
1894                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1895                         DBA::rollback();
1896                         return 0;
1897                 }
1898
1899                 Logger::log('created item '.$current_post);
1900
1901                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1902                         $parent_id = $current_post;
1903                 }
1904
1905                 // Set parent id
1906                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1907
1908                 $item['id'] = $current_post;
1909                 $item['parent'] = $parent_id;
1910
1911                 // update the commented timestamp on the parent
1912                 // Only update "commented" if it is really a comment
1913                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1914                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1915                 } else {
1916                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1917                 }
1918
1919                 if ($dsprsig) {
1920                         /*
1921                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1922                          * We can check for this condition when we decode and encode the stuff again.
1923                          */
1924                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1925                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1926                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1927                         }
1928
1929                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1930                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1931                         }
1932                 }
1933
1934                 if (!empty($diaspora_signed_text)) {
1935                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1936                 }
1937
1938                 if ($item['parent-uri'] === $item['uri']) {
1939                         self::addThread($current_post);
1940                 } else {
1941                         self::updateThread($parent_id);
1942                 }
1943
1944                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1945                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1946                 }
1947
1948                 DBA::commit();
1949
1950                 /*
1951                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1952                  * This is not perfect - but a workable solution until we found the reason for the problem.
1953                  */
1954                 if (!empty($files)) {
1955                         Category::storeTextByURIId($item['uri-id'], $item['uid'], $files);
1956                 }
1957
1958                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1959                 if (self::tagDeliver($item['uid'], $current_post)) {
1960                         // Get the user information for the logging
1961                         $user = User::getById($uid);
1962
1963                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1964                         return 0;
1965                 }
1966
1967                 if (!$dontcache) {
1968                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1969                         if (DBA::isResult($posted_item)) {
1970                                 if ($notify) {
1971                                         Hook::callAll('post_local_end', $posted_item);
1972                                 } else {
1973                                         Hook::callAll('post_remote_end', $posted_item);
1974                                 }
1975                         } else {
1976                                 Logger::log('new item not found in DB, id ' . $current_post);
1977                         }
1978                 }
1979
1980                 if ($item['parent-uri'] === $item['uri']) {
1981                         self::addShadow($current_post);
1982                 } else {
1983                         self::addShadowPost($current_post);
1984                 }
1985
1986                 self::updateContact($item);
1987
1988                 UserItem::setNotification($current_post);
1989
1990                 check_user_notification($current_post);
1991
1992                 $transmit = $notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']));
1993
1994                 if ($transmit) {
1995                         $transmit_item = Item::selectFirst(['verb', 'origin'], ['id' => $item['id']]);
1996                         // Don't relay participation messages
1997                         if (($transmit_item['verb'] == Activity::FOLLOW) &&
1998                                 (!$transmit_item['origin'] || ($item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1999                                 Logger::info('Participation messages will not be relayed', ['item' => $item['id'], 'uri' => $item['uri'], 'verb' => $transmit_item['verb']]);
2000                                 $transmit = false;
2001                         }
2002                 }
2003
2004                 if ($transmit) {
2005                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2006                 }
2007
2008                 return $current_post;
2009         }
2010
2011         /**
2012          * Insert a new item content entry
2013          *
2014          * @param array $item The item fields that are to be inserted
2015          * @return bool
2016          * @throws \Exception
2017          */
2018         private static function insertActivity(&$item)
2019         {
2020                 $activity_index = self::activityToIndex($item['verb']);
2021
2022                 if ($activity_index < 0) {
2023                         return false;
2024                 }
2025
2026                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2027
2028                 // We just remove everything that is content
2029                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2030                         unset($item[$field]);
2031                 }
2032
2033                 // To avoid timing problems, we are using locks.
2034                 $locked = DI::lock()->acquire('item_insert_activity');
2035                 if (!$locked) {
2036                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2037                 }
2038
2039                 // Do we already have this content?
2040                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2041                 if (DBA::isResult($item_activity)) {
2042                         $item['iaid'] = $item_activity['id'];
2043                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2044                 } elseif (DBA::insert('item-activity', $fields)) {
2045                         $item['iaid'] = DBA::lastInsertId();
2046                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2047                 } else {
2048                         // This shouldn't happen.
2049                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2050                         DI::lock()->release('item_insert_activity');
2051                         return false;
2052                 }
2053                 if ($locked) {
2054                         DI::lock()->release('item_insert_activity');
2055                 }
2056                 return true;
2057         }
2058
2059         /**
2060          * Insert a new item content entry
2061          *
2062          * @param array $item The item fields that are to be inserted
2063          * @throws \Exception
2064          */
2065         private static function insertContent(&$item)
2066         {
2067                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2068
2069                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2070                         if (isset($item[$field])) {
2071                                 $fields[$field] = $item[$field];
2072                                 unset($item[$field]);
2073                         }
2074                 }
2075
2076                 // To avoid timing problems, we are using locks.
2077                 $locked = DI::lock()->acquire('item_insert_content');
2078                 if (!$locked) {
2079                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2080                 }
2081
2082                 // Do we already have this content?
2083                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2084                 if (DBA::isResult($item_content)) {
2085                         $item['icid'] = $item_content['id'];
2086                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2087                 } elseif (DBA::insert('item-content', $fields)) {
2088                         $item['icid'] = DBA::lastInsertId();
2089                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2090                 } else {
2091                         // This shouldn't happen.
2092                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2093                 }
2094                 if ($locked) {
2095                         DI::lock()->release('item_insert_content');
2096                 }
2097         }
2098
2099         /**
2100          * Update existing item content entries
2101          *
2102          * @param array $item      The item fields that are to be changed
2103          * @param array $condition The condition for finding the item content entries
2104          * @return bool
2105          * @throws \Exception
2106          */
2107         private static function updateActivity($item, $condition)
2108         {
2109                 if (empty($item['verb'])) {
2110                         return false;
2111                 }
2112                 $activity_index = self::activityToIndex($item['verb']);
2113
2114                 if ($activity_index < 0) {
2115                         return false;
2116                 }
2117
2118                 $fields = ['activity' => $activity_index];
2119
2120                 Logger::log('Update activity for ' . json_encode($condition));
2121
2122                 DBA::update('item-activity', $fields, $condition, true);
2123
2124                 return true;
2125         }
2126
2127         /**
2128          * Update existing item content entries
2129          *
2130          * @param array $item      The item fields that are to be changed
2131          * @param array $condition The condition for finding the item content entries
2132          * @throws \Exception
2133          */
2134         private static function updateContent($item, $condition)
2135         {
2136                 // We have to select only the fields from the "item-content" table
2137                 $fields = [];
2138                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2139                         if (isset($item[$field])) {
2140                                 $fields[$field] = $item[$field];
2141                         }
2142                 }
2143
2144                 if (empty($fields)) {
2145                         // when there are no fields at all, just use the condition
2146                         // This is to ensure that we always store content.
2147                         $fields = $condition;
2148                 }
2149
2150                 Logger::log('Update content for ' . json_encode($condition));
2151
2152                 DBA::update('item-content', $fields, $condition, true);
2153         }
2154
2155         /**
2156          * Distributes public items to the receivers
2157          *
2158          * @param integer $itemid      Item ID that should be added
2159          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2160          * @throws \Exception
2161          */
2162         public static function distribute($itemid, $signed_text = '')
2163         {
2164                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2165                 $parent = self::selectFirst(['owner-id'], $condition);
2166                 if (!DBA::isResult($parent)) {
2167                         return;
2168                 }
2169
2170                 // Only distribute public items from native networks
2171                 $condition = ['id' => $itemid, 'uid' => 0,
2172                         'network' => array_merge(Protocol::FEDERATED ,['']),
2173                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2174                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2175                 if (!DBA::isResult($item)) {
2176                         return;
2177                 }
2178
2179                 $origin = $item['origin'];
2180
2181                 unset($item['id']);
2182                 unset($item['parent']);
2183                 unset($item['mention']);
2184                 unset($item['wall']);
2185                 unset($item['origin']);
2186                 unset($item['starred']);
2187
2188                 $users = [];
2189
2190                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2191                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2192                 if (!DBA::isResult($owner)) {
2193                         return;
2194                 }
2195
2196                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2197                 $contacts = DBA::select('contact', ['uid'], $condition);
2198                 while ($contact = DBA::fetch($contacts)) {
2199                         if ($contact['uid'] == 0) {
2200                                 continue;
2201                         }
2202
2203                         $users[$contact['uid']] = $contact['uid'];
2204                 }
2205                 DBA::close($contacts);
2206
2207                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2208                 $contacts = DBA::select('contact', ['uid'], $condition);
2209                 while ($contact = DBA::fetch($contacts)) {
2210                         if ($contact['uid'] == 0) {
2211                                 continue;
2212                         }
2213
2214                         $users[$contact['uid']] = $contact['uid'];
2215                 }
2216                 DBA::close($contacts);
2217
2218                 if (!empty($owner['alias'])) {
2219                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2220                         $contacts = DBA::select('contact', ['uid'], $condition);
2221                         while ($contact = DBA::fetch($contacts)) {
2222                                 if ($contact['uid'] == 0) {
2223                                         continue;
2224                                 }
2225
2226                                 $users[$contact['uid']] = $contact['uid'];
2227                         }
2228                         DBA::close($contacts);
2229                 }
2230
2231                 $origin_uid = 0;
2232
2233                 if ($item['uri'] != $item['parent-uri']) {
2234                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2235                         while ($parent = self::fetch($parents)) {
2236                                 $users[$parent['uid']] = $parent['uid'];
2237                                 if ($parent['origin'] && !$origin) {
2238                                         $origin_uid = $parent['uid'];
2239                                 }
2240                         }
2241                 }
2242
2243                 foreach ($users as $uid) {
2244                         if ($origin_uid == $uid) {
2245                                 $item['diaspora_signed_text'] = $signed_text;
2246                         }
2247                         self::storeForUser($itemid, $item, $uid);
2248                 }
2249         }
2250
2251         /**
2252          * Store public items for the receivers
2253          *
2254          * @param integer $itemid Item ID that should be added
2255          * @param array   $item   The item entry that will be stored
2256          * @param integer $uid    The user that will receive the item entry
2257          * @throws \Exception
2258          */
2259         private static function storeForUser($itemid, $item, $uid)
2260         {
2261                 $item['uid'] = $uid;
2262                 $item['origin'] = 0;
2263                 $item['wall'] = 0;
2264                 if ($item['uri'] == $item['parent-uri']) {
2265                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2266                 } else {
2267                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2268                 }
2269
2270                 if (empty($item['contact-id'])) {
2271                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2272                         if (!DBA::isResult($self)) {
2273                                 return;
2274                         }
2275                         $item['contact-id'] = $self['id'];
2276                 }
2277
2278                 /// @todo Handling of "event-id"
2279
2280                 $notify = false;
2281                 if ($item['uri'] == $item['parent-uri']) {
2282                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2283                         if (DBA::isResult($contact)) {
2284                                 $notify = self::isRemoteSelf($contact, $item);
2285                         }
2286                 }
2287
2288                 $distributed = self::insert($item, false, $notify, true);
2289
2290                 if (!$distributed) {
2291                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2292                 } else {
2293                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2294                 }
2295         }
2296
2297         /**
2298          * Add a shadow entry for a given item id that is a thread starter
2299          *
2300          * We store every public item entry additionally with the user id "0".
2301          * This is used for the community page and for the search.
2302          * It is planned that in the future we will store public item entries only once.
2303          *
2304          * @param integer $itemid Item ID that should be added
2305          * @throws \Exception
2306          */
2307         public static function addShadow($itemid)
2308         {
2309                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2310                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2311                 $item = self::selectFirst($fields, $condition);
2312
2313                 if (!DBA::isResult($item)) {
2314                         return;
2315                 }
2316
2317                 // is it already a copy?
2318                 if (($itemid == 0) || ($item['uid'] == 0)) {
2319                         return;
2320                 }
2321
2322                 // Is it a visible public post?
2323                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2324                         return;
2325                 }
2326
2327                 // is it an entry from a connector? Only add an entry for natively connected networks
2328                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2329                         return;
2330                 }
2331
2332                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2333                         return;
2334                 }
2335
2336                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2337
2338                 if (DBA::isResult($item)) {
2339                         // Preparing public shadow (removing user specific data)
2340                         $item['uid'] = 0;
2341                         unset($item['id']);
2342                         unset($item['parent']);
2343                         unset($item['wall']);
2344                         unset($item['mention']);
2345                         unset($item['origin']);
2346                         unset($item['starred']);
2347                         unset($item['postopts']);
2348                         unset($item['inform']);
2349                         if ($item['uri'] == $item['parent-uri']) {
2350                                 $item['contact-id'] = $item['owner-id'];
2351                         } else {
2352                                 $item['contact-id'] = $item['author-id'];
2353                         }
2354
2355                         $public_shadow = self::insert($item, false, false, true);
2356
2357                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2358                 }
2359         }
2360
2361         /**
2362          * Add a shadow entry for a given item id that is a comment
2363          *
2364          * This function does the same like the function above - but for comments
2365          *
2366          * @param integer $itemid Item ID that should be added
2367          * @throws \Exception
2368          */
2369         public static function addShadowPost($itemid)
2370         {
2371                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2372                 if (!DBA::isResult($item)) {
2373                         return;
2374                 }
2375
2376                 // Is it a toplevel post?
2377                 if ($item['id'] == $item['parent']) {
2378                         self::addShadow($itemid);
2379                         return;
2380                 }
2381
2382                 // Is this a shadow entry?
2383                 if ($item['uid'] == 0) {
2384                         return;
2385                 }
2386
2387                 // Is there a shadow parent?
2388                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2389                         return;
2390                 }
2391
2392                 // Is there already a shadow entry?
2393                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2394                         return;
2395                 }
2396
2397                 // Save "origin" and "parent" state
2398                 $origin = $item['origin'];
2399                 $parent = $item['parent'];
2400
2401                 // Preparing public shadow (removing user specific data)
2402                 $item['uid'] = 0;
2403                 unset($item['id']);
2404                 unset($item['parent']);
2405                 unset($item['wall']);
2406                 unset($item['mention']);
2407                 unset($item['origin']);
2408                 unset($item['starred']);
2409                 unset($item['postopts']);
2410                 unset($item['inform']);
2411                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2412
2413                 $public_shadow = self::insert($item, false, false, true);
2414
2415                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2416
2417                 // If this was a comment to a Diaspora post we don't get our comment back.
2418                 // This means that we have to distribute the comment by ourselves.
2419                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2420                         self::distribute($public_shadow);
2421                 }
2422         }
2423
2424         /**
2425          * Adds a language specification in a "language" element of given $arr.
2426          * Expects "body" element to exist in $arr.
2427          *
2428          * @param $item
2429          * @throws \Text_LanguageDetect_Exception
2430          */
2431         private static function addLanguageToItemArray(&$item)
2432         {
2433                 $naked_body = BBCode::toPlaintext($item['body'], false);
2434
2435                 $ld = new Text_LanguageDetect();
2436                 $ld->setNameMode(2);
2437                 $languages = $ld->detect($naked_body, 3);
2438
2439                 if (is_array($languages)) {
2440                         $item['language'] = json_encode($languages);
2441                 }
2442         }
2443
2444         /**
2445          * Creates an unique guid out of a given uri
2446          *
2447          * @param string $uri uri of an item entry
2448          * @param string $host hostname for the GUID prefix
2449          * @return string unique guid
2450          */
2451         public static function guidFromUri($uri, $host)
2452         {
2453                 // Our regular guid routine is using this kind of prefix as well
2454                 // We have to avoid that different routines could accidentally create the same value
2455                 $parsed = parse_url($uri);
2456
2457                 // We use a hash of the hostname as prefix for the guid
2458                 $guid_prefix = hash("crc32", $host);
2459
2460                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2461                 unset($parsed["scheme"]);
2462
2463                 // Glue it together to be able to make a hash from it
2464                 $host_id = implode("/", $parsed);
2465
2466                 // We could use any hash algorithm since it isn't a security issue
2467                 $host_hash = hash("ripemd128", $host_id);
2468
2469                 return $guid_prefix.$host_hash;
2470         }
2471
2472         /**
2473          * generate an unique URI
2474          *
2475          * @param integer $uid  User id
2476          * @param string  $guid An existing GUID (Otherwise it will be generated)
2477          *
2478          * @return string
2479          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2480          */
2481         public static function newURI($uid, $guid = "")
2482         {
2483                 if ($guid == "") {
2484                         $guid = System::createUUID();
2485                 }
2486
2487                 return DI::baseUrl()->get() . '/objects/' . $guid;
2488         }
2489
2490         /**
2491          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2492          *
2493          * This can be used to filter for inactive contacts.
2494          * Only do this for public postings to avoid privacy problems, since poco data is public.
2495          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2496          *
2497          * @param array $arr Contains the just posted item record
2498          * @throws \Exception
2499          */
2500         private static function updateContact($arr)
2501         {
2502                 // Unarchive the author
2503                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2504                 if (DBA::isResult($contact)) {
2505                         Contact::unmarkForArchival($contact);
2506                 }
2507
2508                 // Unarchive the contact if it's not our own contact
2509                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2510                 if (DBA::isResult($contact)) {
2511                         Contact::unmarkForArchival($contact);
2512                 }
2513
2514                 /// @todo On private posts we could obfuscate the date
2515                 $update = ($arr['private'] != self::PRIVATE);
2516
2517                 // Is it a forum? Then we don't care about the rules from above
2518                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2519                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2520                                 $update = true;
2521                         }
2522                 }
2523
2524                 if ($update) {
2525                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2526                         // So we have to ensure to only update the last item when it had been our own post,
2527                         // or it had been done by a "regular" contact.
2528                         if (!empty($arr['wall'])) {
2529                                 $condition = ['id' => $arr['contact-id']];
2530                         } else {
2531                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2532                         }
2533                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2534                 }
2535                 // Now do the same for the system wide contacts with uid=0
2536                 if ($arr['private'] != self::PRIVATE) {
2537                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2538                                 ['id' => $arr['owner-id']]);
2539
2540                         if ($arr['owner-id'] != $arr['author-id']) {
2541                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2542                                         ['id' => $arr['author-id']]);
2543                         }
2544                 }
2545         }
2546
2547         public static function setHashtags(&$item)
2548         {
2549                 $tags = BBCode::getTags($item["body"]);
2550
2551                 // No hashtags?
2552                 if (!count($tags)) {
2553                         return false;
2554                 }
2555
2556                 // What happens in [code], stays in [code]!
2557                 // escape the # and the [
2558                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2559                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2560                         function ($match) {
2561                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2562                                 $find = ['#', '['];
2563                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2564                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2565                         }, $item["body"]);
2566
2567                 // This sorting is important when there are hashtags that are part of other hashtags
2568                 // Otherwise there could be problems with hashtags like #test and #test2
2569                 // Because of this we are sorting from the longest to the shortest tag.
2570                 usort($tags, function($a, $b) {
2571                         return strlen($b) <=> strlen($a);
2572                 });
2573
2574                 $URLSearchString = "^\[\]";
2575
2576                 // All hashtags should point to the home server if "local_tags" is activated
2577                 if (DI::config()->get('system', 'local_tags')) {
2578                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2579                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2580                 }
2581
2582                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2583                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2584                         function ($match) {
2585                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2586                         }, $item["body"]);
2587
2588                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2589                         function ($match) {
2590                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2591                         }, $item["body"]);
2592
2593                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2594                         function ($match) {
2595                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2596                         }, $item["body"]);
2597
2598                 // Repair recursive urls
2599                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2600                                 "&num;$2", $item["body"]);
2601
2602                 foreach ($tags as $tag) {
2603                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2604                                 continue;
2605                         }
2606
2607                         $basetag = str_replace('_',' ',substr($tag,1));
2608                         $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2609
2610                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2611                 }
2612
2613                 // Convert back the masked hashtags
2614                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2615
2616                 // Remember! What happens in [code], stays in [code]
2617                 // roleback the # and [
2618                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2619                         function ($match) {
2620                                 // we truly unESCape all sharp and leftsquarebracket
2621                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2622                                 $replace = ['#', '['];
2623                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2624                         }, $item["body"]);
2625         }
2626
2627         /**
2628          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2629          *
2630          * @param int $uid
2631          * @param int $item_id
2632          * @return boolean true if item was deleted, else false
2633          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2634          * @throws \ImagickException
2635          */
2636         private static function tagDeliver($uid, $item_id)
2637         {
2638                 $mention = false;
2639
2640                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2641                 if (!DBA::isResult($user)) {
2642                         return false;
2643                 }
2644
2645                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2646                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2647
2648                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2649                 if (!DBA::isResult($item)) {
2650                         return false;
2651                 }
2652
2653                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2654
2655                 /*
2656                  * Diaspora uses their own hardwired link URL in @-tags
2657                  * instead of the one we supply with webfinger
2658                  */
2659                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2660
2661                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2662                 if ($cnt) {
2663                         foreach ($matches as $mtch) {
2664                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2665                                         $mention = true;
2666                                         Logger::log('mention found: ' . $mtch[2]);
2667                                 }
2668                         }
2669                 }
2670
2671                 if (!$mention) {
2672                         if (($community_page || $prvgroup) &&
2673                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2674                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2675                                 DBA::delete('item', ['id' => $item_id]);
2676                                 return true;
2677                         }
2678                         return false;
2679                 }
2680
2681                 $arr = ['item' => $item, 'user' => $user];
2682
2683                 Hook::callAll('tagged', $arr);
2684
2685                 if (!$community_page && !$prvgroup) {
2686                         return false;
2687                 }
2688
2689                 /*
2690                  * tgroup delivery - setup a second delivery chain
2691                  * prevent delivery looping - only proceed
2692                  * if the message originated elsewhere and is a top-level post
2693                  */
2694                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2695                         return false;
2696                 }
2697
2698                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2699                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2700                 if (!DBA::isResult($self)) {
2701                         return false;
2702                 }
2703
2704                 $owner_id = Contact::getIdForURL($self['url']);
2705
2706                 // also reset all the privacy bits to the forum default permissions
2707
2708                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2709
2710                 $psid = PermissionSet::getIdFromACL(
2711                         $user['uid'],
2712                         $user['allow_cid'],
2713                         $user['allow_gid'],
2714                         $user['deny_cid'],
2715                         $user['deny_gid']
2716                 );
2717
2718                 $forum_mode = ($prvgroup ? 2 : 1);
2719
2720                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2721                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2722                 self::update($fields, ['id' => $item_id]);
2723
2724                 self::updateThread($item_id);
2725
2726                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2727
2728                 return false;
2729         }
2730
2731         public static function isRemoteSelf($contact, &$datarray)
2732         {
2733                 if (!$contact['remote_self']) {
2734                         return false;
2735                 }
2736
2737                 // Prevent the forwarding of posts that are forwarded
2738                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2739                         Logger::log('Already forwarded', Logger::DEBUG);
2740                         return false;
2741                 }
2742
2743                 // Prevent to forward already forwarded posts
2744                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2745                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2746                         return false;
2747                 }
2748
2749                 // Only forward posts
2750                 if ($datarray["verb"] != Activity::POST) {
2751                         Logger::log('No post', Logger::DEBUG);
2752                         return false;
2753                 }
2754
2755                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2756                         Logger::log('Not public', Logger::DEBUG);
2757                         return false;
2758                 }
2759
2760                 $datarray2 = $datarray;
2761                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2762                 if ($contact['remote_self'] == 2) {
2763                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2764                                         ['uid' => $contact['uid'], 'self' => true]);
2765                         if (DBA::isResult($self)) {
2766                                 $datarray['contact-id'] = $self["id"];
2767
2768                                 $datarray['owner-name'] = $self["name"];
2769                                 $datarray['owner-link'] = $self["url"];
2770                                 $datarray['owner-avatar'] = $self["thumb"];
2771
2772                                 $datarray['author-name']   = $datarray['owner-name'];
2773                                 $datarray['author-link']   = $datarray['owner-link'];
2774                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2775
2776                                 unset($datarray['edited']);
2777
2778                                 unset($datarray['network']);
2779                                 unset($datarray['owner-id']);
2780                                 unset($datarray['author-id']);
2781                         }
2782
2783                         if ($contact['network'] != Protocol::FEED) {
2784                                 $datarray["guid"] = System::createUUID();
2785                                 unset($datarray["plink"]);
2786                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2787                                 $datarray["parent-uri"] = $datarray["uri"];
2788                                 $datarray["thr-parent"] = $datarray["uri"];
2789                                 $datarray["extid"] = Protocol::DFRN;
2790                                 $urlpart = parse_url($datarray2['author-link']);
2791                                 $datarray["app"] = $urlpart["host"];
2792                         } else {
2793                                 $datarray['private'] = self::PUBLIC;
2794                         }
2795                 }
2796
2797                 if ($contact['network'] != Protocol::FEED) {
2798                         // Store the original post
2799                         $result = self::insert($datarray2, false, false);
2800                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2801                 } else {
2802                         $datarray["app"] = "Feed";
2803                         $result = true;
2804                 }
2805
2806                 // Trigger automatic reactions for addons
2807                 $datarray['api_source'] = true;
2808
2809                 // We have to tell the hooks who we are - this really should be improved
2810                 $_SESSION["authenticated"] = true;
2811                 $_SESSION["uid"] = $contact['uid'];
2812
2813                 return $result;
2814         }
2815
2816         /**
2817          *
2818          * @param string $s
2819          * @param int    $uid
2820          * @param array  $item
2821          * @param int    $cid
2822          * @return string
2823          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2824          * @throws \ImagickException
2825          */
2826         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2827         {
2828                 if (DI::config()->get('system', 'disable_embedded')) {
2829                         return $s;
2830                 }
2831
2832                 Logger::log('check for photos', Logger::DEBUG);
2833                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2834
2835                 $orig_body = $s;
2836                 $new_body = '';
2837
2838                 $img_start = strpos($orig_body, '[img');
2839                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2840                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2841
2842                 while (($img_st_close !== false) && ($img_len !== false)) {
2843                         $img_st_close++; // make it point to AFTER the closing bracket
2844                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2845
2846                         Logger::log('found photo ' . $image, Logger::DEBUG);
2847
2848                         if (stristr($image, $site . '/photo/')) {
2849                                 // Only embed locally hosted photos
2850                                 $replace = false;
2851                                 $i = basename($image);
2852                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2853                                 $x = strpos($i, '-');
2854
2855                                 if ($x) {
2856                                         $res = substr($i, $x + 1);
2857                                         $i = substr($i, 0, $x);
2858                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2859                                         if (DBA::isResult($photo)) {
2860                                                 /*
2861                                                  * Check to see if we should replace this photo link with an embedded image
2862                                                  * 1. No need to do so if the photo is public
2863                                                  * 2. If there's a contact-id provided, see if they're in the access list
2864                                                  *    for the photo. If so, embed it.
2865                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2866                                                  *    permissions, regardless of order but first check to see if they're an exact
2867                                                  *    match to save some processing overhead.
2868                                                  */
2869                                                 if (self::hasPermissions($photo)) {
2870                                                         if ($cid) {
2871                                                                 $recips = self::enumeratePermissions($photo);
2872                                                                 if (in_array($cid, $recips)) {
2873                                                                         $replace = true;
2874                                                                 }
2875                                                         } elseif ($item) {
2876                                                                 if (self::samePermissions($uid, $item, $photo)) {
2877                                                                         $replace = true;
2878                                                                 }
2879                                                         }
2880                                                 }
2881                                                 if ($replace) {
2882                                                         $photo_img = Photo::getImageForPhoto($photo);
2883                                                         // If a custom width and height were specified, apply before embedding
2884                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2885                                                                 Logger::log('scaling photo', Logger::DEBUG);
2886
2887                                                                 $width = intval($match[1]);
2888                                                                 $height = intval($match[2]);
2889
2890                                                                 $photo_img->scaleDown(max($width, $height));
2891                                                         }
2892
2893                                                         $data = $photo_img->asString();
2894                                                         $type = $photo_img->getType();
2895
2896                                                         Logger::log('replacing photo', Logger::DEBUG);
2897                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2898                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2899                                                 }
2900                                         }
2901                                 }
2902                         }
2903
2904                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2905                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2906                         if ($orig_body === false) {
2907                                 $orig_body = '';
2908                         }
2909
2910                         $img_start = strpos($orig_body, '[img');
2911                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2912                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2913                 }
2914
2915                 $new_body = $new_body . $orig_body;
2916
2917                 return $new_body;
2918         }
2919
2920         private static function hasPermissions($obj)
2921         {
2922                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2923                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2924         }
2925
2926         private static function samePermissions($uid, $obj1, $obj2)
2927         {
2928                 // first part is easy. Check that these are exactly the same.
2929                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2930                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2931                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2932                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2933                         return true;
2934                 }
2935
2936                 // This is harder. Parse all the permissions and compare the resulting set.
2937                 $recipients1 = self::enumeratePermissions($obj1);
2938                 $recipients2 = self::enumeratePermissions($obj2);
2939                 sort($recipients1);
2940                 sort($recipients2);
2941
2942                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2943                 return ($recipients1 == $recipients2);
2944         }
2945
2946         /**
2947          * Returns an array of contact-ids that are allowed to see this object
2948          *
2949          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2950          * @param bool  $check_dead Prunes unavailable contacts from the result
2951          * @return array
2952          * @throws \Exception
2953          */
2954         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2955         {
2956                 $aclFormater = DI::aclFormatter();
2957
2958                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2959                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2960                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2961                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2962                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2963                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2964                 $recipients   = array_diff($recipients, $deny);
2965                 return $recipients;
2966         }
2967
2968         public static function expire($uid, $days, $network = "", $force = false)
2969         {
2970                 if (!$uid || ($days < 1)) {
2971                         return;
2972                 }
2973
2974                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2975                         $uid, GRAVITY_PARENT];
2976
2977                 /*
2978                  * $expire_network_only = save your own wall posts
2979                  * and just expire conversations started by others
2980                  */
2981                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2982
2983                 if ($expire_network_only) {
2984                         $condition[0] .= " AND NOT `wall`";
2985                 }
2986
2987                 if ($network != "") {
2988                         $condition[0] .= " AND `network` = ?";
2989                         $condition[] = $network;
2990                 }
2991
2992                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2993                 $condition[] = $days;
2994
2995                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
2996
2997                 if (!DBA::isResult($items)) {
2998                         return;
2999                 }
3000
3001                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3002
3003                 // Forcing expiring of items - but not notes and marked items
3004                 if ($force) {
3005                         $expire_items = true;
3006                 }
3007
3008                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3009                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3010                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3011
3012                 $expired = 0;
3013
3014                 while ($item = Item::fetch($items)) {
3015                         // don't expire filed items
3016
3017                         if (strpos($item['file'], '[') !== false) {
3018                                 continue;
3019                         }
3020
3021                         // Only expire posts, not photos and photo comments
3022
3023                         if (!$expire_photos && strlen($item['resource-id'])) {
3024                                 continue;
3025                         } elseif (!$expire_starred && intval($item['starred'])) {
3026                                 continue;
3027                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3028                                 continue;
3029                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3030                                 continue;
3031                         }
3032
3033                         self::markForDeletionById($item['id'], PRIORITY_LOW);
3034
3035                         ++$expired;
3036                 }
3037                 DBA::close($items);
3038                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3039         }
3040
3041         public static function firstPostDate($uid, $wall = false)
3042         {
3043                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3044                 $params = ['order' => ['received' => false]];
3045                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3046                 if (DBA::isResult($thread)) {
3047                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3048                 }
3049                 return false;
3050         }
3051
3052         /**
3053          * add/remove activity to an item
3054          *
3055          * Toggle activities as like,dislike,attend of an item
3056          *
3057          * @param string $item_id
3058          * @param string $verb
3059          *            Activity verb. One of
3060          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3061          *            attendno, unattendno, attendmaybe, unattendmaybe
3062          * @return bool
3063          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3064          * @throws \ImagickException
3065          * @hook  'post_local_end'
3066          *            array $arr
3067          *            'post_id' => ID of posted item
3068          */
3069         public static function performActivity($item_id, $verb)
3070         {
3071                 if (!Session::isAuthenticated()) {
3072                         return false;
3073                 }
3074
3075                 switch ($verb) {
3076                         case 'like':
3077                         case 'unlike':
3078                                 $activity = Activity::LIKE;
3079                                 break;
3080                         case 'dislike':
3081                         case 'undislike':
3082                                 $activity = Activity::DISLIKE;
3083                                 break;
3084                         case 'attendyes':
3085                         case 'unattendyes':
3086                                 $activity = Activity::ATTEND;
3087                                 break;
3088                         case 'attendno':
3089                         case 'unattendno':
3090                                 $activity = Activity::ATTENDNO;
3091                                 break;
3092                         case 'attendmaybe':
3093                         case 'unattendmaybe':
3094                                 $activity = Activity::ATTENDMAYBE;
3095                                 break;
3096                         case 'follow':
3097                         case 'unfollow':
3098                                 $activity = Activity::FOLLOW;
3099                                 break;
3100                         default:
3101                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3102                                 return false;
3103                 }
3104
3105                 // Enable activity toggling instead of on/off
3106                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3107
3108                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3109
3110                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3111                 if (!DBA::isResult($item)) {
3112                         Logger::log('like: unknown item ' . $item_id);
3113                         return false;
3114                 }
3115
3116                 $item_uri = $item['uri'];
3117
3118                 $uid = $item['uid'];
3119                 if (($uid == 0) && local_user()) {
3120                         $uid = local_user();
3121                 }
3122
3123                 if (!Security::canWriteToUserWall($uid)) {
3124                         Logger::log('like: unable to write on wall ' . $uid);
3125                         return false;
3126                 }
3127
3128                 // Retrieves the local post owner
3129                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3130                 if (!DBA::isResult($owner_self_contact)) {
3131                         Logger::log('like: unknown owner ' . $uid);
3132                         return false;
3133                 }
3134
3135                 // Retrieve the current logged in user's public contact
3136                 $author_id = public_contact();
3137
3138                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3139                 if (!DBA::isResult($author_contact)) {
3140                         Logger::log('like: unknown author ' . $author_id);
3141                         return false;
3142                 }
3143
3144                 // Contact-id is the uid-dependant author contact
3145                 if (local_user() == $uid) {
3146                         $item_contact_id = $owner_self_contact['id'];
3147                 } else {
3148                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3149                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3150                         if (!DBA::isResult($item_contact)) {
3151                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3152                                 return false;
3153                         }
3154                 }
3155
3156                 // Look for an existing verb row
3157                 // event participation are essentially radio toggles. If you make a subsequent choice,
3158                 // we need to eradicate your first choice.
3159                 if ($event_verb_flag) {
3160                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3161
3162                         // Translate to the index based activity index
3163                         $activities = [];
3164                         foreach ($verbs as $verb) {
3165                                 $activities[] = self::activityToIndex($verb);
3166                         }
3167                 } else {
3168                         $activities = self::activityToIndex($activity);
3169                 }
3170
3171                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3172                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3173
3174                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3175
3176                 // If it exists, mark it as deleted
3177                 if (DBA::isResult($like_item)) {
3178                         self::markForDeletionById($like_item['id']);
3179
3180                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3181                                 return true;
3182                         }
3183                 }
3184
3185                 // Verb is "un-something", just trying to delete existing entries
3186                 if (strpos($verb, 'un') === 0) {
3187                         return true;
3188                 }
3189
3190                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3191
3192                 $new_item = [
3193                         'guid'          => System::createUUID(),
3194                         'uri'           => self::newURI($item['uid']),
3195                         'uid'           => $item['uid'],
3196                         'contact-id'    => $item_contact_id,
3197                         'wall'          => $item['wall'],
3198                         'origin'        => 1,
3199                         'network'       => Protocol::DFRN,
3200                         'gravity'       => GRAVITY_ACTIVITY,
3201                         'parent'        => $item['id'],
3202                         'parent-uri'    => $item['uri'],
3203                         'thr-parent'    => $item['uri'],
3204                         'owner-id'      => $author_id,
3205                         'author-id'     => $author_id,
3206                         'body'          => $activity,
3207                         'verb'          => $activity,
3208                         'object-type'   => $objtype,
3209                         'allow_cid'     => $item['allow_cid'],
3210                         'allow_gid'     => $item['allow_gid'],
3211                         'deny_cid'      => $item['deny_cid'],
3212                         'deny_gid'      => $item['deny_gid'],
3213                         'visible'       => 1,
3214                         'unseen'        => 1,
3215                 ];
3216
3217                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3218                 if (!empty($signed)) {
3219                         $new_item['diaspora_signed_text'] = json_encode($signed);
3220                 }
3221
3222                 $new_item_id = self::insert($new_item);
3223
3224                 // If the parent item isn't visible then set it to visible
3225                 if (!$item['visible']) {
3226                         self::update(['visible' => true], ['id' => $item['id']]);
3227                 }
3228
3229                 $new_item['id'] = $new_item_id;
3230
3231                 Hook::callAll('post_local_end', $new_item);
3232
3233                 return true;
3234         }
3235
3236         private static function addThread($itemid, $onlyshadow = false)
3237         {
3238                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3239                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3240                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3241                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3242                 $item = self::selectFirst($fields, $condition);
3243
3244                 if (!DBA::isResult($item)) {
3245                         return;
3246                 }
3247
3248                 $item['iid'] = $itemid;
3249
3250                 if (!$onlyshadow) {
3251                         $result = DBA::insert('thread', $item);
3252
3253                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3254                 }
3255         }
3256
3257         private static function updateThread($itemid, $setmention = false)
3258         {
3259                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3260                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3261                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3262                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3263
3264                 $item = self::selectFirst($fields, $condition);
3265                 if (!DBA::isResult($item)) {
3266                         return;
3267                 }
3268
3269                 if ($setmention) {
3270                         $item["mention"] = 1;
3271                 }
3272
3273                 $fields = [];
3274
3275                 foreach ($item as $field => $data) {
3276                         if (!in_array($field, ["guid"])) {
3277                                 $fields[$field] = $data;
3278                         }
3279                 }
3280
3281                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3282
3283                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3284         }
3285
3286         private static function deleteThread($itemid, $itemuri = "")
3287         {
3288                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3289                 if (!DBA::isResult($item)) {
3290                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3291                         return;
3292                 }
3293
3294                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3295
3296                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3297
3298                 if ($itemuri != "") {
3299                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3300                         if (!self::exists($condition)) {
3301                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3302                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3303                         }
3304                 }
3305         }
3306
3307         public static function getPermissionsSQLByUserId($owner_id)
3308         {
3309                 $local_user = local_user();
3310                 $remote_user = Session::getRemoteContactID($owner_id);
3311
3312                 /*
3313                  * Construct permissions
3314                  *
3315                  * default permissions - anonymous user
3316                  */
3317                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3318
3319                 // Profile owner - everything is visible
3320                 if ($local_user && ($local_user == $owner_id)) {
3321                         $sql = '';
3322                 } elseif ($remote_user) {
3323                         /*
3324                          * Authenticated visitor. Unless pre-verified,
3325                          * check that the contact belongs to this $owner_id
3326                          * and load the groups the visitor belongs to.
3327                          * If pre-verified, the caller is expected to have already
3328                          * done this and passed the groups into this function.
3329                          */
3330                         $set = PermissionSet::get($owner_id, $remote_user);
3331
3332                         if (!empty($set)) {
3333                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3334                         } else {
3335                                 $sql_set = '';
3336                         }
3337
3338                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3339                 }
3340
3341                 return $sql;
3342         }
3343
3344         /**
3345          * get translated item type
3346          *
3347          * @param $item
3348          * @return string
3349          */
3350         public static function postType($item)
3351         {
3352                 if (!empty($item['event-id'])) {
3353                         return DI::l10n()->t('event');
3354                 } elseif (!empty($item['resource-id'])) {
3355                         return DI::l10n()->t('photo');
3356                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3357                         return DI::l10n()->t('activity');
3358                 } elseif ($item['id'] != $item['parent']) {
3359                         return DI::l10n()->t('comment');
3360                 }
3361
3362                 return DI::l10n()->t('post');
3363         }
3364
3365         /**
3366          * Sets the "rendered-html" field of the provided item
3367          *
3368          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3369          *
3370          * @param array $item
3371          * @param bool  $update
3372          *
3373          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3374          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3375          */
3376         public static function putInCache(&$item, $update = false)
3377         {
3378                 $body = $item["body"];
3379
3380                 $rendered_hash = $item['rendered-hash'] ?? '';
3381                 $rendered_html = $item['rendered-html'] ?? '';
3382
3383                 if ($rendered_hash == ''
3384                         || $rendered_html == ""
3385                         || $rendered_hash != hash("md5", $item["body"])
3386                         || DI::config()->get("system", "ignore_cache")
3387                 ) {
3388                         self::addRedirToImageTags($item);
3389
3390                         $item["rendered-html"] = BBCode::convert($item["body"]);
3391                         $item["rendered-hash"] = hash("md5", $item["body"]);
3392
3393                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3394                         Hook::callAll('put_item_in_cache', $hook_data);
3395                         $item['rendered-html'] = $hook_data['rendered-html'];
3396                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3397                         unset($hook_data);
3398
3399                         // Force an update if the generated values differ from the existing ones
3400                         if ($rendered_hash != $item["rendered-hash"]) {
3401                                 $update = true;
3402                         }
3403
3404                         // Only compare the HTML when we forcefully ignore the cache
3405                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3406                                 $update = true;
3407                         }
3408
3409                         if ($update && !empty($item["id"])) {
3410                                 self::update(
3411                                         [
3412                                                 'rendered-html' => $item["rendered-html"],
3413                                                 'rendered-hash' => $item["rendered-hash"]
3414                                         ],
3415                                         ['id' => $item["id"]]
3416                                 );
3417                         }
3418                 }
3419
3420                 $item["body"] = $body;
3421         }
3422
3423         /**
3424          * Find any non-embedded images in private items and add redir links to them
3425          *
3426          * @param array &$item The field array of an item row
3427          */
3428         private static function addRedirToImageTags(array &$item)
3429         {
3430                 $app = DI::app();
3431
3432                 $matches = [];
3433                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3434                 if ($cnt) {
3435                         foreach ($matches as $mtch) {
3436                                 if (strpos($mtch[1], '/redir') !== false) {
3437                                         continue;
3438                                 }
3439
3440                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3441                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3442                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3443                                 }
3444                         }
3445                 }
3446         }
3447
3448         /**
3449          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3450          * If attach is true, also add icons for item attachments.
3451          *
3452          * @param array   $item
3453          * @param boolean $attach
3454          * @param boolean $is_preview
3455          * @return string item body html
3456          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3457          * @throws \ImagickException
3458          * @hook  prepare_body_init item array before any work
3459          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3460          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3461          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3462          */
3463         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3464         {
3465                 $a = DI::app();
3466                 Hook::callAll('prepare_body_init', $item);
3467
3468                 // In order to provide theme developers more possibilities, event items
3469                 // are treated differently.
3470                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3471                         $ev = Event::getItemHTML($item);
3472                         return $ev;
3473                 }
3474
3475                 $tags = Tag::populateFromItem($item);
3476
3477                 $item['tags'] = $tags['tags'];
3478                 $item['hashtags'] = $tags['hashtags'];
3479                 $item['mentions'] = $tags['mentions'];
3480
3481                 // Compile eventual content filter reasons
3482                 $filter_reasons = [];
3483                 if (!$is_preview && public_contact() != $item['author-id']) {
3484                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3485                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3486                         }
3487
3488                         $hook_data = [
3489                                 'item' => $item,
3490                                 'filter_reasons' => $filter_reasons
3491                         ];
3492                         Hook::callAll('prepare_body_content_filter', $hook_data);
3493                         $filter_reasons = $hook_data['filter_reasons'];
3494                         unset($hook_data);
3495                 }
3496
3497                 // Update the cached values if there is no "zrl=..." on the links.
3498                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3499
3500                 // Or update it if the current viewer is the intented viewer.
3501                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3502                         $update = true;
3503                 }
3504
3505                 self::putInCache($item, $update);
3506                 $s = $item["rendered-html"];
3507
3508                 $hook_data = [
3509                         'item' => $item,
3510                         'html' => $s,
3511                         'preview' => $is_preview,
3512                         'filter_reasons' => $filter_reasons
3513                 ];
3514                 Hook::callAll('prepare_body', $hook_data);
3515                 $s = $hook_data['html'];
3516                 unset($hook_data);
3517
3518                 if (!$attach) {
3519                         // Replace the blockquotes with quotes that are used in mails.
3520                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3521                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3522                         return $s;
3523                 }
3524
3525                 $as = '';
3526                 $vhead = false;
3527                 $matches = [];
3528                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3529                 foreach ($matches as $mtch) {
3530                         $mime = $mtch[3];
3531
3532                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3533
3534                         if (strpos($mime, 'video') !== false) {
3535                                 if (!$vhead) {
3536                                         $vhead = true;
3537                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3538                                 }
3539
3540                                 $url_parts = explode('/', $the_url);
3541                                 $id = end($url_parts);
3542                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3543                                         '$video' => [
3544                                                 'id'     => $id,
3545                                                 'title'  => DI::l10n()->t('View Video'),
3546                                                 'src'    => $the_url,
3547                                                 'mime'   => $mime,
3548                                         ],
3549                                 ]);
3550                         }
3551
3552                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3553                         if ($filetype) {
3554                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3555                                 $filesubtype = str_replace('.', '-', $filesubtype);
3556                         } else {
3557                                 $filetype = 'unkn';
3558                                 $filesubtype = 'unkn';
3559                         }
3560
3561                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3562                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3563
3564                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3565                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3566                 }
3567
3568                 if ($as != '') {
3569                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3570                 }
3571
3572                 // Map.
3573                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3574                         $x = Map::byCoordinates(trim($item['coord']));
3575                         if ($x) {
3576                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3577                         }
3578                 }
3579
3580                 // Replace friendica image url size with theme preference.
3581                 if (!empty($a->theme_info['item_image_size'])) {
3582                         $ps = $a->theme_info['item_image_size'];
3583                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3584                 }
3585
3586                 $s = HTML::applyContentFilter($s, $filter_reasons);
3587
3588                 $hook_data = ['item' => $item, 'html' => $s];
3589                 Hook::callAll('prepare_body_final', $hook_data);
3590
3591                 return $hook_data['html'];
3592         }
3593
3594         /**
3595          * get private link for item
3596          *
3597          * @param array $item
3598          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3599          * @throws \Exception
3600          */
3601         public static function getPlink($item)
3602         {
3603                 $a = DI::app();
3604
3605                 if ($a->user['nickname'] != "") {
3606                         $ret = [
3607                                 'href' => "display/" . $item['guid'],
3608                                 'orig' => "display/" . $item['guid'],
3609                                 'title' => DI::l10n()->t('View on separate page'),
3610                                 'orig_title' => DI::l10n()->t('view on separate page'),
3611                         ];
3612
3613                         if (!empty($item['plink'])) {
3614                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3615                                 $ret["title"] = DI::l10n()->t('link to source');
3616                         }
3617
3618                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3619                         $ret = [
3620                                 'href' => $item['plink'],
3621                                 'orig' => $item['plink'],
3622                                 'title' => DI::l10n()->t('link to source'),
3623                         ];
3624                 } else {
3625                         $ret = [];
3626                 }
3627
3628                 return $ret;
3629         }
3630
3631         /**
3632          * Is the given item array a post that is sent as starting post to a forum?
3633          *
3634          * @param array $item
3635          * @param array $owner
3636          *
3637          * @return boolean "true" when it is a forum post
3638          */
3639         public static function isForumPost(array $item, array $owner = [])
3640         {
3641                 if (empty($owner)) {
3642                         $owner = User::getOwnerDataById($item['uid']);
3643                         if (empty($owner)) {
3644                                 return false;
3645                         }
3646                 }
3647
3648                 if (($item['author-id'] == $item['owner-id']) ||
3649                         ($owner['id'] == $item['contact-id']) ||
3650                         ($item['uri'] != $item['parent-uri']) ||
3651                         $item['origin']) {
3652                         return false;
3653                 }
3654
3655                 return Contact::isForum($item['contact-id']);
3656         }
3657
3658         /**
3659          * Search item id for given URI or plink
3660          *
3661          * @param string $uri
3662          * @param integer $uid
3663          *
3664          * @return integer item id
3665          */
3666         public static function searchByLink($uri, $uid = 0)
3667         {
3668                 $ssl_uri = str_replace('http://', 'https://', $uri);
3669                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3670
3671                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3672                 if (DBA::isResult($item)) {
3673                         return $item['id'];
3674                 }
3675
3676                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3677                 if (!DBA::isResult($itemcontent)) {
3678                         return 0;
3679                 }
3680
3681                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3682                 if (!DBA::isResult($itemuri)) {
3683                         return 0;
3684                 }
3685
3686                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3687                 if (DBA::isResult($item)) {
3688                         return $item['id'];
3689                 }
3690
3691                 return 0;
3692         }
3693
3694         /**
3695          * Return the URI for a link to the post
3696          *
3697          * @param string $uri URI or link to post
3698          *
3699          * @return string URI
3700          */
3701         public static function getURIByLink(string $uri)
3702         {
3703                 $ssl_uri = str_replace('http://', 'https://', $uri);
3704                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3705
3706                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3707                 if (DBA::isResult($item)) {
3708                         return $item['uri'];
3709                 }
3710
3711                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3712                 if (!DBA::isResult($itemcontent)) {
3713                         return '';
3714                 }
3715
3716                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3717                 if (DBA::isResult($itemuri)) {
3718                         return $itemuri['uri'];
3719                 }
3720
3721                 return '';
3722         }
3723
3724         /**
3725          * Fetches item for given URI or plink
3726          *
3727          * @param string $uri
3728          * @param integer $uid
3729          *
3730          * @return integer item id
3731          */
3732         public static function fetchByLink($uri, $uid = 0)
3733         {
3734                 $item_id = self::searchByLink($uri, $uid);
3735                 if (!empty($item_id)) {
3736                         return $item_id;
3737                 }
3738
3739                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3740                         $item_id = self::searchByLink($fetched_uri, $uid);
3741                 } else {
3742                         $item_id = Diaspora::fetchByURL($uri);
3743                 }
3744
3745                 if (!empty($item_id)) {
3746                         return $item_id;
3747                 }
3748
3749                 return 0;
3750         }
3751
3752         /**
3753          * Return share data from an item array (if the item is shared item)
3754          * We are providing the complete Item array, because at some time in the future
3755          * we hopefully will define these values not in the body anymore but in some item fields.
3756          * This function is meant to replace all similar functions in the system.
3757          *
3758          * @param array $item
3759          *
3760          * @return array with share information
3761          */
3762         public static function getShareArray($item)
3763         {
3764                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3765                         return [];
3766                 }
3767
3768                 $attribute_string = $matches[2];
3769                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3770                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3771                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3772                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3773                         }
3774                 }
3775                 return $attributes;
3776         }
3777
3778         /**
3779          * Fetch item information for shared items from the original items and adds it.
3780          *
3781          * @param array $item
3782          *
3783          * @return array item array with data from the original item
3784          */
3785         public static function addShareDataFromOriginal($item)
3786         {
3787                 $shared = self::getShareArray($item);
3788                 if (empty($shared)) {
3789                         return $item;
3790                 }
3791
3792                 // Real reshares always have got a GUID.
3793                 if (empty($shared['guid'])) {
3794                         return $item;
3795                 }
3796
3797                 $uid = $item['uid'] ?? 0;
3798
3799                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3800                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3801                 if (!DBA::isResult($shared_item)) {
3802                         if (empty($shared['link'])) {
3803                                 return $item;
3804                         }
3805
3806                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3807                         $id = self::fetchByLink($shared['link'], $uid);
3808                         if (empty($id)) {
3809                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3810                                 return $item;
3811                         }
3812
3813                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3814                         if (!DBA::isResult($shared_item)) {
3815                                 return $item;
3816                         }
3817                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3818                 } else {
3819                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3820                 }
3821
3822                 if (!empty($shared_item['title'])) {
3823                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3824                         unset($shared_item['title']);
3825                 } else {
3826                         $body = $shared_item['body'];
3827                 }
3828
3829                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3830                 unset($shared_item['body']);
3831
3832                 return array_merge($item, $shared_item);
3833         }
3834 }