src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Core\Worker;
  33 use Friendica\Database\DBA;
  34 use Friendica\DI;
  35 use Friendica\Protocol\Activity;
  36 use Friendica\Protocol\ActivityPub;
  37 use Friendica\Protocol\Diaspora;
  38 use Friendica\Protocol\OStatus;
  39 use Friendica\Util\DateTimeFormat;
  40 use Friendica\Util\Map;
  41 use Friendica\Util\Network;
  42 use Friendica\Util\Security;
  43 use Friendica\Util\Strings;
  44 use Friendica\Util\XML;
  45 use Friendica\Worker\Delivery;
  46 use Text_LanguageDetect;
  47 use Friendica\Repository\PermissionSet as RepPermissionSet;
  48
  49 class Item
  50 {
  51         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  52         const PT_ARTICLE = 0;
  53         const PT_NOTE = 1;
  54         const PT_PAGE = 2;
  55         const PT_IMAGE = 16;
  56         const PT_AUDIO = 17;
  57         const PT_VIDEO = 18;
  58         const PT_DOCUMENT = 19;
  59         const PT_EVENT = 32;
  60         const PT_PERSONAL_NOTE = 128;
  61
  62         // Field list that is used to display the items
  63         const DISPLAY_FIELDLIST = [
  64                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  65                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  66                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  67                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  68                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  69                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  70                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  71                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  72                 'writable', 'self', 'cid', 'alias', 'pinned',
  73                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  74                 'event-summary', 'event-desc', 'event-location', 'event-type',
  75                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  76                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  77         ];
  78
  79         // Field list that is used to deliver items via the protocols
  80         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  81                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  82                         'private', 'title', 'body', 'location', 'coord', 'app',
  83                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  84                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  85                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  86                         'signed_text', 'signature', 'signer', 'network'];
  87
  88         // Field list for "item-content" table that is mixed with the item table
  89         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  90                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  91                         'object-type', 'object', 'target-type', 'target', 'plink'];
  92
  93         // Field list for "item-content" table that is not present in the "item" table
  94         const CONTENT_FIELDLIST = ['language'];
  95
  96         // All fields in the item table
  97         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  98                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  99                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 100                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
 101                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 102                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 103                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 104                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 105                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 106                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 107                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
 108
 109         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 110         // The item-activity table only stores the index and needs this array to know the matching activity.
 111         const ACTIVITIES = [
 112                 Activity::LIKE, Activity::DISLIKE,
 113                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 114                 Activity::FOLLOW,
 115                 Activity::ANNOUNCE];
 116
 117         const PUBLIC = 0;
 118         const PRIVATE = 1;
 119         const UNLISTED = 2;
 120
 121         private static $legacy_mode = null;
 122
 123         public static function isLegacyMode()
 124         {
 125                 if (is_null(self::$legacy_mode)) {
 126                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 127                 }
 128
 129                 return self::$legacy_mode;
 130         }
 131
 132         /**
 133          * Set the pinned state of an item
 134          *
 135          * @param integer $iid    Item ID
 136          * @param integer $uid    User ID
 137          * @param boolean $pinned Pinned state
 138          */
 139         public static function setPinned(int $iid, int $uid, bool $pinned)
 140         {
 141                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 142         }
 143
 144         /**
 145          * Get the pinned state
 146          *
 147          * @param integer $iid Item ID
 148          * @param integer $uid User ID
 149          *
 150          * @return boolean pinned state
 151          */
 152         public static function getPinned(int $iid, int $uid)
 153         {
 154                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 155                 if (!DBA::isResult($useritem)) {
 156                         return false;
 157                 }
 158                 return (bool)$useritem['pinned'];
 159         }
 160
 161         /**
 162          * Select pinned rows from the item table for a given user
 163          *
 164          * @param integer $uid       User ID
 165          * @param array   $selected  Array of selected fields, empty for all
 166          * @param array   $condition Array of fields for condition
 167          * @param array   $params    Array of several parameters
 168          *
 169          * @return boolean|object
 170          * @throws \Exception
 171          */
 172         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 173         {
 174                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 175                 if (!DBA::isResult($useritems)) {
 176                         return $useritems;
 177                 }
 178
 179                 $pinned = [];
 180                 while ($useritem = self::fetch($useritems)) {
 181                         $pinned[] = $useritem['iid'];
 182                 }
 183                 DBA::close($useritems);
 184
 185                 if (empty($pinned)) {
 186                         return [];
 187                 }
 188
 189                 if (empty($condition) || !is_array($condition)) {
 190                         $condition = ['iid' => $pinned];
 191                 } else {
 192                         reset($condition);
 193                         $first_key = key($condition);
 194                         if (!is_int($first_key)) {
 195                                 $condition['iid'] = $pinned;
 196                         } else {
 197                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 198                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 199                                 $condition = array_merge($condition, $pinned);
 200                         }
 201                 }
 202
 203                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 204         }
 205
 206         /**
 207          * returns an activity index from an activity string
 208          *
 209          * @param string $activity activity string
 210          * @return integer Activity index
 211          */
 212         public static function activityToIndex($activity)
 213         {
 214                 $index = array_search($activity, self::ACTIVITIES);
 215
 216                 if (is_bool($index)) {
 217                         $index = -1;
 218                 }
 219
 220                 return $index;
 221         }
 222
 223         /**
 224          * returns an activity string from an activity index
 225          *
 226          * @param integer $index activity index
 227          * @return string Activity string
 228          */
 229         private static function indexToActivity($index)
 230         {
 231                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 232                         return '';
 233                 }
 234
 235                 return self::ACTIVITIES[$index];
 236         }
 237
 238         /**
 239          * Fetch a single item row
 240          *
 241          * @param mixed $stmt statement object
 242          * @return array current row
 243          */
 244         public static function fetch($stmt)
 245         {
 246                 $row = DBA::fetch($stmt);
 247
 248                 if (is_bool($row)) {
 249                         return $row;
 250                 }
 251
 252                 // ---------------------- Transform item structure data ----------------------
 253
 254                 // We prefer the data from the user's contact over the public one
 255                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 256                         ($row['author-link'] == $row['contact-link'])) {
 257                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 258                                 $row['author-avatar'] = $row['contact-avatar'];
 259                         }
 260                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 261                                 $row['author-name'] = $row['contact-name'];
 262                         }
 263                 }
 264
 265                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 266                         ($row['owner-link'] == $row['contact-link'])) {
 267                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 268                                 $row['owner-avatar'] = $row['contact-avatar'];
 269                         }
 270                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 271                                 $row['owner-name'] = $row['contact-name'];
 272                         }
 273                 }
 274
 275                 // We can always comment on posts from these networks
 276                 if (array_key_exists('writable', $row) &&
 277                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 278                         $row['writable'] = true;
 279                 }
 280
 281                 // ---------------------- Transform item content data ----------------------
 282
 283                 // Fetch data from the item-content table whenever there is content there
 284                 if (self::isLegacyMode()) {
 285                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 286                         foreach ($legacy_fields as $field) {
 287                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 288                                         $row[$field] = $row['internal-item-' . $field];
 289                                 }
 290                                 unset($row['internal-item-' . $field]);
 291                         }
 292                 }
 293
 294                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 295                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 296                         if (array_key_exists('title', $row)) {
 297                                 $row['title'] = '';
 298                         }
 299                         if (array_key_exists('body', $row)) {
 300                                 $row['body'] = $row['verb'];
 301                         }
 302                         if (array_key_exists('object', $row)) {
 303                                 $row['object'] = '';
 304                         }
 305                         if (array_key_exists('object-type', $row)) {
 306                                 $row['object-type'] = Activity\ObjectType::NOTE;
 307                         }
 308                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 309                         // Posts don't have a target - but having tags or files.
 310                         // We safe some performance by building tag and file strings only here.
 311                         // We remove the target since they aren't used for this type.
 312                         // In mail posts we do store some mail header data in the object.
 313                         if (array_key_exists('target', $row)) {
 314                                 $row['target'] = '';
 315                         }
 316                 }
 317
 318                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 319                         // Build the tag string out of the term entries
 320                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 321                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 322                         }
 323
 324                         // Build the file string out of the term entries
 325                         if (array_key_exists('file', $row) && empty($row['file'])) {
 326                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 327                         }
 328                 }
 329
 330                 if ($row['internal-psid'] == RepPermissionSet::PUBLIC) {
 331                         if (array_key_exists('allow_cid', $row)) {
 332                                 $row['allow_cid'] = '';
 333                         }
 334                         if (array_key_exists('allow_gid', $row)) {
 335                                 $row['allow_gid'] = '';
 336                         }
 337                         if (array_key_exists('deny_cid', $row)) {
 338                                 $row['deny_cid'] = '';
 339                         }
 340                         if (array_key_exists('deny_gid', $row)) {
 341                                 $row['deny_gid'] = '';
 342                         }
 343                 }
 344
 345                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 346                         $row['signed_text'] = $row['interaction'];
 347                 }
 348
 349                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 350                         $row['ignored'] = $row['internal-user-ignored'];
 351                 }
 352
 353                 // Remove internal fields
 354                 unset($row['internal-activity']);
 355                 unset($row['internal-network']);
 356                 unset($row['internal-iid']);
 357                 unset($row['internal-psid']);
 358                 unset($row['internal-iaid']);
 359                 unset($row['internal-user-ignored']);
 360                 unset($row['interaction']);
 361
 362                 return $row;
 363         }
 364
 365         /**
 366          * Fills an array with data from an item query
 367          *
 368          * @param object $stmt statement object
 369          * @param bool   $do_close
 370          * @return array Data array
 371          */
 372         public static function inArray($stmt, $do_close = true) {
 373                 if (is_bool($stmt)) {
 374                         return $stmt;
 375                 }
 376
 377                 $data = [];
 378                 while ($row = self::fetch($stmt)) {
 379                         $data[] = $row;
 380                 }
 381                 if ($do_close) {
 382                         DBA::close($stmt);
 383                 }
 384                 return $data;
 385         }
 386
 387         /**
 388          * Check if item data exists
 389          *
 390          * @param array $condition array of fields for condition
 391          *
 392          * @return boolean Are there rows for that condition?
 393          * @throws \Exception
 394          */
 395         public static function exists($condition) {
 396                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 397
 398                 if (is_bool($stmt)) {
 399                         $retval = $stmt;
 400                 } else {
 401                         $retval = (DBA::numRows($stmt) > 0);
 402                 }
 403
 404                 DBA::close($stmt);
 405
 406                 return $retval;
 407         }
 408
 409         /**
 410          * Retrieve a single record from the item table for a given user and returns it in an associative array
 411          *
 412          * @param integer $uid User ID
 413          * @param array   $selected
 414          * @param array   $condition
 415          * @param array   $params
 416          * @return bool|array
 417          * @throws \Exception
 418          * @see   DBA::select
 419          */
 420         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 421         {
 422                 $params['uid'] = $uid;
 423
 424                 if (empty($selected)) {
 425                         $selected = Item::DISPLAY_FIELDLIST;
 426                 }
 427
 428                 return self::selectFirst($selected, $condition, $params);
 429         }
 430
 431         /**
 432          * Select rows from the item table for a given user
 433          *
 434          * @param integer $uid       User ID
 435          * @param array   $selected  Array of selected fields, empty for all
 436          * @param array   $condition Array of fields for condition
 437          * @param array   $params    Array of several parameters
 438          *
 439          * @return boolean|object
 440          * @throws \Exception
 441          */
 442         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 443         {
 444                 $params['uid'] = $uid;
 445
 446                 if (empty($selected)) {
 447                         $selected = Item::DISPLAY_FIELDLIST;
 448                 }
 449
 450                 return self::select($selected, $condition, $params);
 451         }
 452
 453         /**
 454          * Retrieve a single record from the item table and returns it in an associative array
 455          *
 456          * @param array $fields
 457          * @param array $condition
 458          * @param array $params
 459          * @return bool|array
 460          * @throws \Exception
 461          * @see   DBA::select
 462          */
 463         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 464         {
 465                 $params['limit'] = 1;
 466
 467                 $result = self::select($fields, $condition, $params);
 468
 469                 if (is_bool($result)) {
 470                         return $result;
 471                 } else {
 472                         $row = self::fetch($result);
 473                         DBA::close($result);
 474                         return $row;
 475                 }
 476         }
 477
 478         /**
 479          * Select rows from the item table and returns them as an array
 480          *
 481          * @param array $selected  Array of selected fields, empty for all
 482          * @param array $condition Array of fields for condition
 483          * @param array $params    Array of several parameters
 484          *
 485          * @return array
 486          * @throws \Exception
 487          */
 488         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 489         {
 490                 $result = self::select($fields, $condition, $params);
 491
 492                 if (is_bool($result)) {
 493                         return [];
 494                 }
 495
 496                 $data = [];
 497                 while ($row = self::fetch($result)) {
 498                         $data[] = $row;
 499                 }
 500                 DBA::close($result);
 501
 502                 return $data;
 503         }
 504
 505         /**
 506          * Select rows from the item table
 507          *
 508          * @param array $selected  Array of selected fields, empty for all
 509          * @param array $condition Array of fields for condition
 510          * @param array $params    Array of several parameters
 511          *
 512          * @return boolean|object
 513          * @throws \Exception
 514          */
 515         public static function select(array $selected = [], array $condition = [], $params = [])
 516         {
 517                 $uid = 0;
 518                 $usermode = false;
 519
 520                 if (isset($params['uid'])) {
 521                         $uid = $params['uid'];
 522                         $usermode = true;
 523                 }
 524
 525                 $fields = self::fieldlist($usermode);
 526
 527                 $select_fields = self::constructSelectFields($fields, $selected);
 528
 529                 $condition_string = DBA::buildCondition($condition);
 530
 531                 $condition_string = self::addTablesToFields($condition_string, $fields);
 532
 533                 if ($usermode) {
 534                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 535                 }
 536
 537                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 538
 539                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 540
 541                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 542
 543                 return DBA::p($sql, $condition);
 544         }
 545
 546         /**
 547          * Select rows from the starting post in the item table
 548          *
 549          * @param integer $uid       User ID
 550          * @param array   $selected
 551          * @param array   $condition Array of fields for condition
 552          * @param array   $params    Array of several parameters
 553          *
 554          * @return boolean|object
 555          * @throws \Exception
 556          */
 557         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 558         {
 559                 $params['uid'] = $uid;
 560
 561                 if (empty($selected)) {
 562                         $selected = Item::DISPLAY_FIELDLIST;
 563                 }
 564
 565                 return self::selectThread($selected, $condition, $params);
 566         }
 567
 568         /**
 569          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 570          *
 571          * @param integer $uid User ID
 572          * @param array   $selected
 573          * @param array   $condition
 574          * @param array   $params
 575          * @return bool|array
 576          * @throws \Exception
 577          * @see   DBA::select
 578          */
 579         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 580         {
 581                 $params['uid'] = $uid;
 582
 583                 if (empty($selected)) {
 584                         $selected = Item::DISPLAY_FIELDLIST;
 585                 }
 586
 587                 return self::selectFirstThread($selected, $condition, $params);
 588         }
 589
 590         /**
 591          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 592          *
 593          * @param array $fields
 594          * @param array $condition
 595          * @param array $params
 596          * @return bool|array
 597          * @throws \Exception
 598          * @see   DBA::select
 599          */
 600         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 601         {
 602                 $params['limit'] = 1;
 603                 $result = self::selectThread($fields, $condition, $params);
 604
 605                 if (is_bool($result)) {
 606                         return $result;
 607                 } else {
 608                         $row = self::fetch($result);
 609                         DBA::close($result);
 610                         return $row;
 611                 }
 612         }
 613
 614         /**
 615          * Select rows from the starting post in the item table
 616          *
 617          * @param array $selected  Array of selected fields, empty for all
 618          * @param array $condition Array of fields for condition
 619          * @param array $params    Array of several parameters
 620          *
 621          * @return boolean|object
 622          * @throws \Exception
 623          */
 624         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 625         {
 626                 $uid = 0;
 627                 $usermode = false;
 628
 629                 if (isset($params['uid'])) {
 630                         $uid = $params['uid'];
 631                         $usermode = true;
 632                 }
 633
 634                 $fields = self::fieldlist($usermode);
 635
 636                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 637
 638                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 639                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 640                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 641                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 642
 643                 $select_fields = self::constructSelectFields($fields, $selected);
 644
 645                 $condition_string = DBA::buildCondition($condition);
 646
 647                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 648                 $condition_string = self::addTablesToFields($condition_string, $fields);
 649
 650                 if ($usermode) {
 651                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 652                 }
 653
 654                 $param_string = DBA::buildParameter($params);
 655                 $param_string = self::addTablesToFields($param_string, $threadfields);
 656                 $param_string = self::addTablesToFields($param_string, $fields);
 657
 658                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 659
 660                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 661
 662                 return DBA::p($sql, $condition);
 663         }
 664
 665         /**
 666          * Returns a list of fields that are associated with the item table
 667          *
 668          * @param $usermode
 669          * @return array field list
 670          */
 671         private static function fieldlist($usermode)
 672         {
 673                 $fields = [];
 674
 675                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 676                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 677                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 678                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 679                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 680                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 681                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 682                         'network' => 'internal-network', 'iaid' => 'internal-iaid', 'psid' => 'internal-psid'];
 683
 684                 if ($usermode) {
 685                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 686                 }
 687
 688                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 689
 690                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 691
 692                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 693
 694                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 695
 696                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 697                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 698
 699                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 700                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 701
 702                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 703                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 704                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 705
 706                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 707
 708                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 709
 710                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 711                         'start' => 'event-start','finish' => 'event-finish',
 712                         'summary' => 'event-summary','desc' => 'event-desc',
 713                         'location' => 'event-location', 'type' => 'event-type',
 714                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 715                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 716
 717                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 718
 719                 $fields['diaspora-interaction'] = ['interaction'];
 720
 721                 return $fields;
 722         }
 723
 724         /**
 725          * Returns SQL condition for the "select" functions
 726          *
 727          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 728          *
 729          * @return string SQL condition
 730          */
 731         private static function condition($thread_mode)
 732         {
 733                 if ($thread_mode) {
 734                         $master_table = "`thread`";
 735                 } else {
 736                         $master_table = "`item`";
 737                 }
 738                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 739                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 740                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 741                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 742                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 743                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 744                         GRAVITY_PARENT, GRAVITY_PARENT);
 745         }
 746
 747         /**
 748          * Returns all needed "JOIN" commands for the "select" functions
 749          *
 750          * @param integer $uid          User ID
 751          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 752          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 753          *
 754          * @param         $user_mode
 755          * @return string The SQL joins for the "select" functions
 756          */
 757         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 758         {
 759                 if ($thread_mode) {
 760                         $master_table = "`thread`";
 761                         $master_table_key = "`thread`.`iid`";
 762                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 763                 } else {
 764                         $master_table = "`item`";
 765                         $master_table_key = "`item`.`id`";
 766                         $joins = '';
 767                 }
 768
 769                 if ($user_mode) {
 770                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 771                                 AND NOT `contact`.`blocked`
 772                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 773                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 774                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 775                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 776                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 777                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 778                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 779                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 780                 } else {
 781                         if (strpos($sql_commands, "`contact`.") !== false) {
 782                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 783                         }
 784                         if (strpos($sql_commands, "`author`.") !== false) {
 785                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 786                         }
 787                         if (strpos($sql_commands, "`owner`.") !== false) {
 788                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 789                         }
 790                 }
 791
 792                 if (strpos($sql_commands, "`group_member`.") !== false) {
 793                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 794                 }
 795
 796                 if (strpos($sql_commands, "`user`.") !== false) {
 797                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 798                 }
 799
 800                 if (strpos($sql_commands, "`event`.") !== false) {
 801                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 802                 }
 803
 804                 if (strpos($sql_commands, "`sign`.") !== false) {
 805                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 806                 }
 807
 808                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 809                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 810                 }
 811
 812                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 813                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 814                 }
 815
 816                 if (strpos($sql_commands, "`item-content`.") !== false) {
 817                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 818                 }
 819
 820                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 821                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 822                 }
 823
 824                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 825                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 826                 }
 827
 828                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 829                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 830                 }
 831
 832                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 833                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 834                 }
 835
 836                 return $joins;
 837         }
 838
 839         /**
 840          * Add the field list for the "select" functions
 841          *
 842          * @param array $fields The field definition array
 843          * @param array $selected The array with the selected fields from the "select" functions
 844          *
 845          * @return string The field list
 846          */
 847         private static function constructSelectFields(array $fields, array $selected)
 848         {
 849                 $selected = array_merge($selected, ['internal-iid', 'internal-psid', 'internal-iaid', 'internal-network']);
 850
 851                 if (in_array('verb', $selected)) {
 852                         $selected[] = 'internal-activity';
 853                 }
 854
 855                 if (in_array('ignored', $selected)) {
 856                         $selected[] = 'internal-user-ignored';
 857                 }
 858
 859                 if (in_array('signed_text', $selected)) {
 860                         $selected[] = 'interaction';
 861                 }
 862
 863                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 864
 865                 $selection = [];
 866                 foreach ($fields as $table => $table_fields) {
 867                         foreach ($table_fields as $field => $select) {
 868                                 if (empty($selected) || in_array($select, $selected)) {
 869                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 870                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 871                                         }
 872                                         if (is_int($field)) {
 873                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 874                                         } else {
 875                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 876                                         }
 877                                 }
 878                         }
 879                 }
 880                 return implode(", ", $selection);
 881         }
 882
 883         /**
 884          * add table definition to fields in an SQL query
 885          *
 886          * @param string $query SQL query
 887          * @param array $fields The field definition array
 888          *
 889          * @return string the changed SQL query
 890          */
 891         private static function addTablesToFields($query, $fields)
 892         {
 893                 foreach ($fields as $table => $table_fields) {
 894                         foreach ($table_fields as $alias => $field) {
 895                                 if (is_int($alias)) {
 896                                         $replace_field = $field;
 897                                 } else {
 898                                         $replace_field = $alias;
 899                                 }
 900
 901                                 $search = "/([^\.])`" . $field . "`/i";
 902                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 903                                 $query = preg_replace($search, $replace, $query);
 904                         }
 905                 }
 906                 return $query;
 907         }
 908
 909         /**
 910          * Update existing item entries
 911          *
 912          * @param array $fields    The fields that are to be changed
 913          * @param array $condition The condition for finding the item entries
 914          *
 915          * In the future we may have to change permissions as well.
 916          * Then we had to add the user id as third parameter.
 917          *
 918          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 919          *
 920          * @return integer|boolean number of affected rows - or "false" if there was an error
 921          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 922          */
 923         public static function update(array $fields, array $condition)
 924         {
 925                 if (empty($condition) || empty($fields)) {
 926                         return false;
 927                 }
 928
 929                 // To ensure the data integrity we do it in an transaction
 930                 DBA::transaction();
 931
 932                 // We cannot simply expand the condition to check for origin entries
 933                 // The condition needn't to be a simple array but could be a complex condition.
 934                 // And we have to execute this query before the update to ensure to fetch the same data.
 935                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 936
 937                 $content_fields = [];
 938                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 939                         if (isset($fields[$field])) {
 940                                 $content_fields[$field] = $fields[$field];
 941                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 942                                         unset($fields[$field]);
 943                                 } else {
 944                                         $fields[$field] = null;
 945                                 }
 946                         }
 947                 }
 948
 949                 $delivery_data = ItemDeliveryData::extractFields($fields);
 950
 951                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 952                 foreach ($clear_fields as $field) {
 953                         if (array_key_exists($field, $fields)) {
 954                                 $fields[$field] = null;
 955                         }
 956                 }
 957
 958                 if (array_key_exists('tag', $fields)) {
 959                         $tags = $fields['tag'];
 960                         $fields['tag'] = null;
 961                 } else {
 962                         $tags = null;
 963                 }
 964
 965                 if (array_key_exists('file', $fields)) {
 966                         $files = $fields['file'];
 967                         $fields['file'] = null;
 968                 } else {
 969                         $files = null;
 970                 }
 971
 972                 if (!empty($fields)) {
 973                         $success = DBA::update('item', $fields, $condition);
 974
 975                         if (!$success) {
 976                                 DBA::close($items);
 977                                 DBA::rollback();
 978                                 return false;
 979                         }
 980                 }
 981
 982                 // When there is no content for the "old" item table, this will count the fetched items
 983                 $rows = DBA::affectedRows();
 984
 985                 $notify_items = [];
 986
 987                 while ($item = DBA::fetch($items)) {
 988                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 989                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 990
 991                                 if (empty($item['iaid'])) {
 992                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 993                                         if (DBA::isResult($item_activity)) {
 994                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 995                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 996                                                         if (self::isLegacyMode()) {
 997                                                                 $item_fields[$field] = null;
 998                                                         } else {
 999                                                                 unset($item_fields[$field]);
1000                                                         }
1001                                                 }
1002                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1003
1004                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
1005                                                         DBA::delete('item-content', ['id' => $item['icid']]);
1006                                                 }
1007                                         }
1008                                 } elseif (!empty($item['icid'])) {
1009                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
1010
1011                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
1012                                                 DBA::delete('item-content', ['id' => $item['icid']]);
1013                                         }
1014                                 }
1015                         } else {
1016                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
1017
1018                                 if (empty($item['icid'])) {
1019                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
1020                                         if (DBA::isResult($item_content)) {
1021                                                 $item_fields = ['icid' => $item_content['id']];
1022                                                 // Clear all fields in the item table that have a content in the item-content table
1023                                                 foreach ($item_content as $field => $content) {
1024                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1025                                                                 if (self::isLegacyMode()) {
1026                                                                         $item_fields[$field] = null;
1027                                                                 } else {
1028                                                                         unset($item_fields[$field]);
1029                                                                 }
1030                                                         }
1031                                                 }
1032                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1033                                         }
1034                                 }
1035                         }
1036
1037                         if (!is_null($tags)) {
1038                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1039                                 if (!empty($item['tag'])) {
1040                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1041                                 }
1042                         }
1043
1044                         if (!is_null($files)) {
1045                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1046                                 if (!empty($item['file'])) {
1047                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1048                                 }
1049                         }
1050
1051                         ItemDeliveryData::update($item['id'], $delivery_data);
1052
1053                         self::updateThread($item['id']);
1054
1055                         // We only need to notfiy others when it is an original entry from us.
1056                         // Only call the notifier when the item has some content relevant change.
1057                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1058                                 $notify_items[] = $item['id'];
1059                         }
1060                 }
1061
1062                 DBA::close($items);
1063                 DBA::commit();
1064
1065                 foreach ($notify_items as $notify_item) {
1066                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1067                 }
1068
1069                 return $rows;
1070         }
1071
1072         /**
1073          * Delete an item and notify others about it - if it was ours
1074          *
1075          * @param array   $condition The condition for finding the item entries
1076          * @param integer $priority  Priority for the notification
1077          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1078          */
1079         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
1080         {
1081                 $items = self::select(['id'], $condition);
1082                 while ($item = self::fetch($items)) {
1083                         self::markForDeletionById($item['id'], $priority);
1084                 }
1085                 DBA::close($items);
1086         }
1087
1088         /**
1089          * Delete an item for an user and notify others about it - if it was ours
1090          *
1091          * @param array   $condition The condition for finding the item entries
1092          * @param integer $uid       User who wants to delete this item
1093          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1094          */
1095         public static function deleteForUser($condition, $uid)
1096         {
1097                 if ($uid == 0) {
1098                         return;
1099                 }
1100
1101                 $items = self::select(['id', 'uid'], $condition);
1102                 while ($item = self::fetch($items)) {
1103                         // "Deleting" global items just means hiding them
1104                         if ($item['uid'] == 0) {
1105                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1106
1107                                 // Delete notifications
1108                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1109                         } elseif ($item['uid'] == $uid) {
1110                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
1111                         } else {
1112                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1113                         }
1114                 }
1115                 DBA::close($items);
1116         }
1117
1118         /**
1119          * Mark an item for deletion, delete related data and notify others about it - if it was ours
1120          *
1121          * @param integer $item_id
1122          * @param integer $priority Priority for the notification
1123          *
1124          * @return boolean success
1125          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1126          */
1127         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
1128         {
1129                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
1130                 // locate item to be deleted
1131                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1132                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1133                         'verb', 'object-type', 'object', 'target', 'contact-id',
1134                         'icid', 'iaid', 'psid'];
1135                 $item = self::selectFirst($fields, ['id' => $item_id]);
1136                 if (!DBA::isResult($item)) {
1137                         Logger::info('Item not found.', ['id' => $item_id]);
1138                         return false;
1139                 }
1140
1141                 if ($item['deleted']) {
1142                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1143                         return false;
1144                 }
1145
1146                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1147                 if (!DBA::isResult($parent)) {
1148                         $parent = ['origin' => false];
1149                 }
1150
1151                 // clean up categories and tags so they don't end up as orphans
1152
1153                 $matches = false;
1154                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1155
1156                 if ($cnt) {
1157                         foreach ($matches as $mtch) {
1158                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1159                         }
1160                 }
1161
1162                 $matches = false;
1163
1164                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1165
1166                 if ($cnt) {
1167                         foreach ($matches as $mtch) {
1168                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1169                         }
1170                 }
1171
1172                 /*
1173                  * If item is a link to a photo resource, nuke all the associated photos
1174                  * (visitors will not have photo resources)
1175                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1176                  * generate a resource-id and therefore aren't intimately linked to the item.
1177                  */
1178                 /// @TODO: this should first check if photo is used elsewhere
1179                 if (strlen($item['resource-id'])) {
1180                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1181                 }
1182
1183                 // If item is a link to an event, delete the event.
1184                 if (intval($item['event-id'])) {
1185                         Event::delete($item['event-id']);
1186                 }
1187
1188                 // If item has attachments, drop them
1189                 /// @TODO: this should first check if attachment is used elsewhere
1190                 foreach (explode(",", $item['attach']) as $attach) {
1191                         preg_match("|attach/(\d+)|", $attach, $matches);
1192                         if (is_array($matches) && count($matches) > 1) {
1193                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1194                         }
1195                 }
1196
1197                 // Delete tags that had been attached to other items
1198                 self::deleteTagsFromItem($item);
1199
1200                 // Delete notifications
1201                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1202
1203                 // Set the item to "deleted"
1204                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1205                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1206
1207                 Term::insertFromTagFieldByItemId($item['id'], '');
1208                 Term::insertFromFileFieldByItemId($item['id'], '');
1209                 self::deleteThread($item['id'], $item['parent-uri']);
1210
1211                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1212                         self::markForDeletion(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1213                 }
1214
1215                 ItemDeliveryData::delete($item['id']);
1216
1217                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1218
1219                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1220                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1221                 }
1222                 // When the permission set will be used in photo and events as well,
1223                 // this query here needs to be extended.
1224                 // @todo Currently deactivated. We need the permission set in the deletion process.
1225                 // This is a reminder to add the removal somewhere else.
1226                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1227                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1228                 //}
1229
1230                 // If it's the parent of a comment thread, kill all the kids
1231                 if ($item['id'] == $item['parent']) {
1232                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1233                 }
1234
1235                 // Is it our comment and/or our thread?
1236                 if ($item['origin'] || $parent['origin']) {
1237                         // When we delete the original post we will delete all existing copies on the server as well
1238                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1239
1240                         // send the notification upstream/downstream
1241                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1242                 } elseif ($item['uid'] != 0) {
1243
1244                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1245                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1246                         if (DBA::isResult($global_item)) {
1247                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1248                         }
1249                 }
1250
1251                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1252
1253                 return true;
1254         }
1255
1256         private static function deleteTagsFromItem($item)
1257         {
1258                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1259                         return;
1260                 }
1261
1262                 $xo = XML::parseString($item["object"], false);
1263                 $xt = XML::parseString($item["target"], false);
1264
1265                 if ($xt->type != Activity\ObjectType::NOTE) {
1266                         return;
1267                 }
1268
1269                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1270                 if (!DBA::isResult($i)) {
1271                         return;
1272                 }
1273
1274                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1275                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1276                 $author_copy = $item["origin"];
1277
1278                 if (($owner_remove && $author_copy) || !$owner_remove) {
1279                         return;
1280                 }
1281
1282                 $tags = explode(',', $i["tag"]);
1283                 $newtags = [];
1284                 if (count($tags)) {
1285                         foreach ($tags as $tag) {
1286                                 if (trim($tag) !== trim($xo->body)) {
1287                                        $newtags[] = trim($tag);
1288                                 }
1289                         }
1290                 }
1291                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1292         }
1293
1294         private static function guid($item, $notify)
1295         {
1296                 if (!empty($item['guid'])) {
1297                         return Strings::escapeTags(trim($item['guid']));
1298                 }
1299
1300                 if ($notify) {
1301                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1302                         // We add the hash of our own host because our host is the original creator of the post.
1303                         $prefix_host = DI::baseUrl()->getHostname();
1304                 } else {
1305                         $prefix_host = '';
1306
1307                         // We are only storing the post so we create a GUID from the original hostname.
1308                         if (!empty($item['author-link'])) {
1309                                 $parsed = parse_url($item['author-link']);
1310                                 if (!empty($parsed['host'])) {
1311                                         $prefix_host = $parsed['host'];
1312                                 }
1313                         }
1314
1315                         if (empty($prefix_host) && !empty($item['plink'])) {
1316                                 $parsed = parse_url($item['plink']);
1317                                 if (!empty($parsed['host'])) {
1318                                         $prefix_host = $parsed['host'];
1319                                 }
1320                         }
1321
1322                         if (empty($prefix_host) && !empty($item['uri'])) {
1323                                 $parsed = parse_url($item['uri']);
1324                                 if (!empty($parsed['host'])) {
1325                                         $prefix_host = $parsed['host'];
1326                                 }
1327                         }
1328
1329                         // Is it in the format data@host.tld? - Used for mail contacts
1330                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1331                                 $mailparts = explode('@', $item['author-link']);
1332                                 $prefix_host = array_pop($mailparts);
1333                         }
1334                 }
1335
1336                 if (!empty($item['plink'])) {
1337                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1338                 } elseif (!empty($item['uri'])) {
1339                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1340                 } else {
1341                         $guid = System::createUUID(hash('crc32', $prefix_host));
1342                 }
1343
1344                 return $guid;
1345         }
1346
1347         private static function contactId($item)
1348         {
1349                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1350                         return $item['contact-id'];
1351                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1352                         return $item['contact-id'];
1353                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1354                         return $item['author-id'];
1355                 } elseif (!empty($item['contact-id'])) {
1356                         return $item['contact-id'];
1357                 } else {
1358                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1359                         if (!empty($contact_id)) {
1360                                 return $contact_id;
1361                         }
1362                 }
1363                 return $item['author-id'];
1364         }
1365
1366         // This function will finally cover most of the preparation functionality in mod/item.php
1367         public static function prepare(&$item)
1368         {
1369                 /*
1370                  * @TODO: Unused code triggering inspection errors
1371                  *
1372                 $data = BBCode::getAttachmentData($item['body']);
1373                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1374                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1375                         $posttype = Item::PT_PAGE;
1376                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1377                 }
1378                  */
1379         }
1380
1381         /**
1382          * Write an item array into a spool file to be inserted later.
1383          * This command is called whenever there are issues storing an item.
1384          *
1385          * @param array $item The item fields that are to be inserted
1386          * @throws \Exception
1387          */
1388         private static function spool($orig_item)
1389         {
1390                 // Now we store the data in the spool directory
1391                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1392                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1393
1394                 $spoolpath = get_spoolpath();
1395                 if ($spoolpath != "") {
1396                         $spool = $spoolpath . '/' . $file;
1397
1398                         file_put_contents($spool, json_encode($orig_item));
1399                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1400                 }
1401         }
1402
1403         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1404         {
1405                 $orig_item = $item;
1406
1407                 $priority = PRIORITY_HIGH;
1408
1409                 // If it is a posting where users should get notifications, then define it as wall posting
1410                 if ($notify) {
1411                         $item['wall'] = 1;
1412                         $item['origin'] = 1;
1413                         $item['network'] = Protocol::DFRN;
1414                         $item['protocol'] = Conversation::PARCEL_DFRN;
1415
1416                         if (is_int($notify)) {
1417                                 $priority = $notify;
1418                         }
1419                 } else {
1420                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1421                 }
1422
1423                 $item['guid'] = self::guid($item, $notify);
1424                 $item['uri'] = substr(Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']))), 0, 255);
1425
1426                 // Store URI data
1427                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1428
1429                 // Store conversation data
1430                 $item = Conversation::insert($item);
1431
1432                 /*
1433                  * If a Diaspora signature structure was passed in, pull it out of the
1434                  * item array and set it aside for later storage.
1435                  */
1436
1437                 $dsprsig = null;
1438                 if (isset($item['dsprsig'])) {
1439                         $encoded_signature = $item['dsprsig'];
1440                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1441                         unset($item['dsprsig']);
1442                 }
1443
1444                 $diaspora_signed_text = '';
1445                 if (isset($item['diaspora_signed_text'])) {
1446                         $diaspora_signed_text = $item['diaspora_signed_text'];
1447                         unset($item['diaspora_signed_text']);
1448                 }
1449
1450                 // Converting the plink
1451                 /// @TODO Check if this is really still needed
1452                 if ($item['network'] == Protocol::OSTATUS) {
1453                         if (isset($item['plink'])) {
1454                                 $item['plink'] = OStatus::convertHref($item['plink']);
1455                         } elseif (isset($item['uri'])) {
1456                                 $item['plink'] = OStatus::convertHref($item['uri']);
1457                         }
1458                 }
1459
1460                 if (!empty($item['thr-parent'])) {
1461                         $item['parent-uri'] = $item['thr-parent'];
1462                 }
1463
1464                 $activity = DI::activity();
1465
1466                 if (isset($item['gravity'])) {
1467                         $item['gravity'] = intval($item['gravity']);
1468                 } elseif ($item['parent-uri'] === $item['uri']) {
1469                         $item['gravity'] = GRAVITY_PARENT;
1470                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1471                         $item['gravity'] = GRAVITY_COMMENT;
1472                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1473                         $item['gravity'] = GRAVITY_ACTIVITY;
1474                 } else {
1475                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1476                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1477                 }
1478
1479                 $uid = intval($item['uid']);
1480
1481                 // check for create date and expire time
1482                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1483
1484                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1485                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1486                         $expire_interval = $user['expire'];
1487                 }
1488
1489                 if (($expire_interval > 0) && !empty($item['created'])) {
1490                         $expire_date = time() - ($expire_interval * 86400);
1491                         $created_date = strtotime($item['created']);
1492                         if ($created_date < $expire_date) {
1493                                 Logger::notice('Item created before expiration interval.', [
1494                                         'created' => date('c', $created_date),
1495                                         'expired' => date('c', $expire_date),
1496                                         '$item' => $item
1497                                 ]);
1498                                 return 0;
1499                         }
1500                 }
1501
1502                 /*
1503                  * Do we already have this item?
1504                  * We have to check several networks since Friendica posts could be repeated
1505                  * via OStatus (maybe Diasporsa as well)
1506                  */
1507                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1508                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1509                                 trim($item['uri']), $item['uid'],
1510                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1511                         $existing = self::selectFirst(['id', 'network'], $condition);
1512                         if (DBA::isResult($existing)) {
1513                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1514                                 if ($uid != 0) {
1515                                         Logger::notice('Item already existed for user', [
1516                                                 'uri' => $item['uri'],
1517                                                 'uid' => $uid,
1518                                                 'network' => $item['network'],
1519                                                 'existing_id' => $existing["id"],
1520                                                 'existing_network' => $existing["network"]
1521                                         ]);
1522                                 }
1523
1524                                 return $existing["id"];
1525                         }
1526                 }
1527
1528                 $item['wall']          = intval($item['wall'] ?? 0);
1529                 $item['extid']         = trim($item['extid'] ?? '');
1530                 $item['author-name']   = trim($item['author-name'] ?? '');
1531                 $item['author-link']   = trim($item['author-link'] ?? '');
1532                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1533                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1534                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1535                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1536                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1537                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1538                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1539                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1540                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1541                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
1542                 $item['location']      = trim($item['location'] ?? '');
1543                 $item['coord']         = trim($item['coord'] ?? '');
1544                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1545                 $item['deleted']       = 0;
1546                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1547                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1548                 $item['verb']          = trim($item['verb'] ?? '');
1549                 $item['object-type']   = trim($item['object-type'] ?? '');
1550                 $item['object']        = trim($item['object'] ?? '');
1551                 $item['target-type']   = trim($item['target-type'] ?? '');
1552                 $item['target']        = trim($item['target'] ?? '');
1553                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
1554                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1555                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1556                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1557                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1558                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1559                 $item['body']          = trim($item['body'] ?? '');
1560                 $item['tag']           = trim($item['tag'] ?? '');
1561                 $item['attach']        = trim($item['attach'] ?? '');
1562                 $item['app']           = trim($item['app'] ?? '');
1563                 $item['origin']        = intval($item['origin'] ?? 0);
1564                 $item['postopts']      = trim($item['postopts'] ?? '');
1565                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1566                 $item['event-id']      = intval($item['event-id'] ?? 0);
1567                 $item['inform']        = trim($item['inform'] ?? '');
1568                 $item['file']          = trim($item['file'] ?? '');
1569
1570                 // When there is no content then we don't post it
1571                 if ($item['body'].$item['title'] == '') {
1572                         Logger::notice('No body, no title.');
1573                         return 0;
1574                 }
1575
1576                 self::addLanguageToItemArray($item);
1577
1578                 // Items cannot be stored before they happen ...
1579                 if ($item['created'] > DateTimeFormat::utcNow()) {
1580                         $item['created'] = DateTimeFormat::utcNow();
1581                 }
1582
1583                 // We haven't invented time travel by now.
1584                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1585                         $item['edited'] = DateTimeFormat::utcNow();
1586                 }
1587
1588                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1589
1590                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1591                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1592
1593                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1594
1595                 if (Contact::isBlocked($item['author-id'])) {
1596                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1597                         return 0;
1598                 }
1599
1600                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1601                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1602                         return 0;
1603                 }
1604
1605                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1606                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1607                         return 0;
1608                 }
1609
1610                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1611                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1612
1613                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1614
1615                 if (Contact::isBlocked($item['owner-id'])) {
1616                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1617                         return 0;
1618                 }
1619
1620                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1621                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1622                         return 0;
1623                 }
1624
1625                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1626                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1627                         return 0;
1628                 }
1629
1630                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1631                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1632                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1633                         return 0;
1634                 }
1635
1636                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1637                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1638                         return 0;
1639                 }
1640
1641                 // We don't store the causer, we only have it here for the checks above
1642                 unset($item['causer-id']);
1643                 unset($item['causer-link']);
1644
1645                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1646                 $item["contact-id"] = self::contactId($item);
1647
1648                 if ($item['network'] == Protocol::PHANTOM) {
1649                         $item['network'] = Protocol::DFRN;
1650                         Logger::notice('Missing network, setting to {network}.', [
1651                                 'uri' => $item["uri"],
1652                                 'network' => $item['network'],
1653                                 'callstack' => System::callstack()
1654                         ]);
1655                 }
1656
1657                 // Checking if there is already an item with the same guid
1658                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1659                 if (self::exists($condition)) {
1660                         Logger::notice('Found already existing item', [
1661                                 'guid' => $item['guid'],
1662                                 'uid' => $item['uid'],
1663                                 'network' => $item['network']
1664                         ]);
1665                         return 0;
1666                 }
1667
1668                 if ($item['verb'] == Activity::FOLLOW) {
1669                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1670                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1671                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1672                                 return 0;
1673                         }
1674
1675                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1676                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1677                         if (self::exists($condition)) {
1678                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1679                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1680                                 return 0;
1681                         }
1682                 }
1683
1684                 // Check for hashtags in the body and repair or add hashtag links
1685                 self::setHashtags($item);
1686
1687                 $item['thr-parent'] = $item['parent-uri'];
1688
1689                 $notify_type = Delivery::POST;
1690                 $allow_cid = '';
1691                 $allow_gid = '';
1692                 $deny_cid  = '';
1693                 $deny_gid  = '';
1694
1695                 if ($item['parent-uri'] === $item['uri']) {
1696                         $parent_id = 0;
1697                         $parent_deleted = 0;
1698                         $allow_cid = $item['allow_cid'];
1699                         $allow_gid = $item['allow_gid'];
1700                         $deny_cid  = $item['deny_cid'];
1701                         $deny_gid  = $item['deny_gid'];
1702                 } else {
1703                         // find the parent and snarf the item id and ACLs
1704                         // and anything else we need to inherit
1705
1706                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1707                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1708                                 'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1709                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1710                         $params = ['order' => ['id' => false]];
1711                         $parent = self::selectFirst($fields, $condition, $params);
1712
1713                         if (DBA::isResult($parent)) {
1714                                 // is the new message multi-level threaded?
1715                                 // even though we don't support it now, preserve the info
1716                                 // and re-attach to the conversation parent.
1717
1718                                 if ($parent['uri'] != $parent['parent-uri']) {
1719                                         $item['parent-uri'] = $parent['parent-uri'];
1720
1721                                         $condition = ['uri' => $item['parent-uri'],
1722                                                 'parent-uri' => $item['parent-uri'],
1723                                                 'uid' => $item['uid']];
1724                                         $params = ['order' => ['id' => false]];
1725                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1726
1727                                         if (DBA::isResult($toplevel_parent)) {
1728                                                 $parent = $toplevel_parent;
1729                                         }
1730                                 }
1731
1732                                 $parent_id      = $parent['id'];
1733                                 $parent_deleted = $parent['deleted'];
1734                                 $allow_cid      = $parent['allow_cid'];
1735                                 $allow_gid      = $parent['allow_gid'];
1736                                 $deny_cid       = $parent['deny_cid'];
1737                                 $deny_gid       = $parent['deny_gid'];
1738                                 $item['wall']   = $parent['wall'];
1739
1740                                 /*
1741                                  * If the parent is private, force privacy for the entire conversation
1742                                  * This differs from the above settings as it subtly allows comments from
1743                                  * email correspondents to be private even if the overall thread is not.
1744                                  */
1745                                 if ($parent['private']) {
1746                                         $item['private'] = $parent['private'];
1747                                 }
1748
1749                                 /*
1750                                  * Edge case. We host a public forum that was originally posted to privately.
1751                                  * The original author commented, but as this is a comment, the permissions
1752                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1753                                  */
1754                                 if ((intval($parent['forum_mode']) == 1) && ($parent['private'] != self::PUBLIC)) {
1755                                         $item['private'] = self::PUBLIC;
1756                                 }
1757
1758                                 // If its a post that originated here then tag the thread as "mention"
1759                                 if ($item['origin'] && $item['uid']) {
1760                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1761                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1762                                 }
1763
1764                                 // Update the contact relations
1765                                 if ($item['author-id'] != $parent['author-id']) {
1766                                         DBA::update('contact-relation', ['last-interaction' => $item['created']], ['cid' => $parent['author-id'], 'relation-cid' => $item['author-id']], true);
1767                                 }
1768                         } else {
1769                                 /*
1770                                  * Allow one to see reply tweets from status.net even when
1771                                  * we don't have or can't see the original post.
1772                                  */
1773                                 if ($force_parent) {
1774                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1775                                         $parent_id = 0;
1776                                         $item['parent-uri'] = $item['uri'];
1777                                         $item['gravity'] = GRAVITY_PARENT;
1778                                 } else {
1779                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1780                                         return 0;
1781                                 }
1782
1783                                 $parent_deleted = 0;
1784                         }
1785                 }
1786
1787                 if (stristr($item['verb'], Activity::POKE)) {
1788                         $notify_type = Delivery::POKE;
1789                 }
1790
1791                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1792                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1793
1794                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1795                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1796                 if (self::exists($condition)) {
1797                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1798                         return 0;
1799                 }
1800
1801                 // On Friendica and Diaspora the GUID is unique
1802                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1803                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1804                         if (self::exists($condition)) {
1805                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1806                                 return 0;
1807                         }
1808                 } elseif ($item['network'] == Protocol::OSTATUS) {
1809                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1810                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1811                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1812                         if (self::exists($condition)) {
1813                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1814                                 return 0;
1815                         }
1816                 }
1817
1818                 // Is this item available in the global items (with uid=0)?
1819                 if ($item["uid"] == 0) {
1820                         $item["global"] = true;
1821
1822                         // Set the global flag on all items if this was a global item entry
1823                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1824                 } else {
1825                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1826                 }
1827
1828                 // ACL settings
1829                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1830                         $private = self::PRIVATE;
1831                 } else {
1832                         $private = $item['private'];
1833                 }
1834
1835                 $item["allow_cid"] = $allow_cid;
1836                 $item["allow_gid"] = $allow_gid;
1837                 $item["deny_cid"] = $deny_cid;
1838                 $item["deny_gid"] = $deny_gid;
1839                 $item["private"] = $private;
1840                 $item["deleted"] = $parent_deleted;
1841
1842                 // Fill the cache field
1843                 self::putInCache($item);
1844
1845                 if ($notify) {
1846                         $item['edit'] = false;
1847                         $item['parent'] = $parent_id;
1848                         Hook::callAll('post_local', $item);
1849                         unset($item['edit']);
1850                         unset($item['parent']);
1851                 } else {
1852                         Hook::callAll('post_remote', $item);
1853                 }
1854
1855                 // This array field is used to trigger some automatic reactions
1856                 // It is mainly used in the "post_local" hook.
1857                 unset($item['api_source']);
1858
1859                 if (!empty($item['cancel'])) {
1860                         Logger::log('post cancelled by addon.');
1861                         return 0;
1862                 }
1863
1864                 /*
1865                  * Check for already added items.
1866                  * There is a timing issue here that sometimes creates double postings.
1867                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1868                  */
1869                 if ($item["uid"] == 0) {
1870                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1871                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1872                                 return 0;
1873                         }
1874                 }
1875
1876                 Logger::log('' . print_r($item,true), Logger::DATA);
1877
1878                 if (array_key_exists('tag', $item)) {
1879                         $tags = $item['tag'];
1880                         unset($item['tag']);
1881                 } else {
1882                         $tags = '';
1883                 }
1884
1885                 if (array_key_exists('file', $item)) {
1886                         $files = $item['file'];
1887                         unset($item['file']);
1888                 } else {
1889                         $files = '';
1890                 }
1891
1892                 // Creates or assigns the permission set
1893                 $item['psid'] = PermissionSet::getIdFromACL(
1894                         $item['uid'],
1895                         $item['allow_cid'],
1896                         $item['allow_gid'],
1897                         $item['deny_cid'],
1898                         $item['deny_gid']
1899                 );
1900
1901                 $item['allow_cid'] = null;
1902                 $item['allow_gid'] = null;
1903                 $item['deny_cid'] = null;
1904                 $item['deny_gid'] = null;
1905
1906                 // We are doing this outside of the transaction to avoid timing problems
1907                 if (!self::insertActivity($item)) {
1908                         self::insertContent($item);
1909                 }
1910
1911                 $delivery_data = ItemDeliveryData::extractFields($item);
1912
1913                 unset($item['postopts']);
1914                 unset($item['inform']);
1915
1916                 // These fields aren't stored anymore in the item table, they are fetched upon request
1917                 unset($item['author-link']);
1918                 unset($item['author-name']);
1919                 unset($item['author-avatar']);
1920                 unset($item['author-network']);
1921
1922                 unset($item['owner-link']);
1923                 unset($item['owner-name']);
1924                 unset($item['owner-avatar']);
1925
1926                 $like_no_comment = DI::config()->get('system', 'like_no_comment');
1927
1928                 DBA::transaction();
1929                 $ret = DBA::insert('item', $item);
1930
1931                 // When the item was successfully stored we fetch the ID of the item.
1932                 if (DBA::isResult($ret)) {
1933                         $current_post = DBA::lastInsertId();
1934                 } else {
1935                         // This can happen - for example - if there are locking timeouts.
1936                         DBA::rollback();
1937
1938                         // Store the data into a spool file so that we can try again later.
1939                         self::spool($orig_item);
1940                         return 0;
1941                 }
1942
1943                 if ($current_post == 0) {
1944                         // This is one of these error messages that never should occur.
1945                         Logger::log("couldn't find created item - we better quit now.");
1946                         DBA::rollback();
1947                         return 0;
1948                 }
1949
1950                 // How much entries have we created?
1951                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1952                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1953
1954                 if ($entries > 1) {
1955                         // There are duplicates. We delete our just created entry.
1956                         Logger::info('Delete duplicated item', ['id' => $current_post, 'uri' => $item['uri'], 'uid' => $item['uid'], 'guid' => $item['guid']]);
1957
1958                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1959                         DBA::delete('item', ['id' => $current_post]);
1960                         DBA::commit();
1961                         return 0;
1962                 } elseif ($entries == 0) {
1963                         // This really should never happen since we quit earlier if there were problems.
1964                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1965                         DBA::rollback();
1966                         return 0;
1967                 }
1968
1969                 Logger::log('created item '.$current_post);
1970
1971                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1972                         $parent_id = $current_post;
1973                 }
1974
1975                 // Set parent id
1976                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1977
1978                 $item['id'] = $current_post;
1979                 $item['parent'] = $parent_id;
1980
1981                 // update the commented timestamp on the parent
1982                 // Only update "commented" if it is really a comment
1983                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1984                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1985                 } else {
1986                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1987                 }
1988
1989                 if ($dsprsig) {
1990                         /*
1991                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1992                          * We can check for this condition when we decode and encode the stuff again.
1993                          */
1994                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1995                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1996                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1997                         }
1998
1999                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
2000                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
2001                         } else {
2002                                 // The other fields are used by very old Friendica servers, so we currently store them differently
2003                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
2004                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
2005                         }
2006                 }
2007
2008                 if (!empty($diaspora_signed_text)) {
2009                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
2010                 }
2011
2012                 if ($item['parent-uri'] === $item['uri']) {
2013                         self::addThread($current_post);
2014                 } else {
2015                         self::updateThread($parent_id);
2016                 }
2017
2018                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
2019                         ItemDeliveryData::insert($current_post, $delivery_data);
2020                 }
2021
2022                 DBA::commit();
2023
2024                 /*
2025                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
2026                  * This is not perfect - but a workable solution until we found the reason for the problem.
2027                  */
2028                 if (!empty($tags)) {
2029                         Term::insertFromTagFieldByItemId($current_post, $tags);
2030                 }
2031
2032                 if (!empty($files)) {
2033                         Term::insertFromFileFieldByItemId($current_post, $files);
2034                 }
2035
2036                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
2037                 if (self::tagDeliver($item['uid'], $current_post)) {
2038                         // Get the user information for the logging
2039                         $user = User::getById($uid);
2040
2041                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
2042                         return 0;
2043                 }
2044
2045                 if (!$dontcache) {
2046                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2047                         if (DBA::isResult($posted_item)) {
2048                                 if ($notify) {
2049                                         Hook::callAll('post_local_end', $posted_item);
2050                                 } else {
2051                                         Hook::callAll('post_remote_end', $posted_item);
2052                                 }
2053                         } else {
2054                                 Logger::log('new item not found in DB, id ' . $current_post);
2055                         }
2056                 }
2057
2058                 if ($item['parent-uri'] === $item['uri']) {
2059                         self::addShadow($current_post);
2060                 } else {
2061                         self::addShadowPost($current_post);
2062                 }
2063
2064                 self::updateContact($item);
2065
2066                 UserItem::setNotification($current_post);
2067
2068                 check_user_notification($current_post);
2069
2070                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2071                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2072                 }
2073
2074                 return $current_post;
2075         }
2076
2077         /**
2078          * Insert a new item content entry
2079          *
2080          * @param array $item The item fields that are to be inserted
2081          * @return bool
2082          * @throws \Exception
2083          */
2084         private static function insertActivity(&$item)
2085         {
2086                 $activity_index = self::activityToIndex($item['verb']);
2087
2088                 if ($activity_index < 0) {
2089                         return false;
2090                 }
2091
2092                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2093
2094                 // We just remove everything that is content
2095                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2096                         unset($item[$field]);
2097                 }
2098
2099                 // To avoid timing problems, we are using locks.
2100                 $locked = DI::lock()->acquire('item_insert_activity');
2101                 if (!$locked) {
2102                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2103                 }
2104
2105                 // Do we already have this content?
2106                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2107                 if (DBA::isResult($item_activity)) {
2108                         $item['iaid'] = $item_activity['id'];
2109                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2110                 } elseif (DBA::insert('item-activity', $fields)) {
2111                         $item['iaid'] = DBA::lastInsertId();
2112                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2113                 } else {
2114                         // This shouldn't happen.
2115                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2116                         DI::lock()->release('item_insert_activity');
2117                         return false;
2118                 }
2119                 if ($locked) {
2120                         DI::lock()->release('item_insert_activity');
2121                 }
2122                 return true;
2123         }
2124
2125         /**
2126          * Insert a new item content entry
2127          *
2128          * @param array $item The item fields that are to be inserted
2129          * @throws \Exception
2130          */
2131         private static function insertContent(&$item)
2132         {
2133                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2134
2135                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2136                         if (isset($item[$field])) {
2137                                 $fields[$field] = $item[$field];
2138                                 unset($item[$field]);
2139                         }
2140                 }
2141
2142                 // To avoid timing problems, we are using locks.
2143                 $locked = DI::lock()->acquire('item_insert_content');
2144                 if (!$locked) {
2145                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2146                 }
2147
2148                 // Do we already have this content?
2149                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2150                 if (DBA::isResult($item_content)) {
2151                         $item['icid'] = $item_content['id'];
2152                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2153                 } elseif (DBA::insert('item-content', $fields)) {
2154                         $item['icid'] = DBA::lastInsertId();
2155                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2156                 } else {
2157                         // This shouldn't happen.
2158                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2159                 }
2160                 if ($locked) {
2161                         DI::lock()->release('item_insert_content');
2162                 }
2163         }
2164
2165         /**
2166          * Update existing item content entries
2167          *
2168          * @param array $item      The item fields that are to be changed
2169          * @param array $condition The condition for finding the item content entries
2170          * @return bool
2171          * @throws \Exception
2172          */
2173         private static function updateActivity($item, $condition)
2174         {
2175                 if (empty($item['verb'])) {
2176                         return false;
2177                 }
2178                 $activity_index = self::activityToIndex($item['verb']);
2179
2180                 if ($activity_index < 0) {
2181                         return false;
2182                 }
2183
2184                 $fields = ['activity' => $activity_index];
2185
2186                 Logger::log('Update activity for ' . json_encode($condition));
2187
2188                 DBA::update('item-activity', $fields, $condition, true);
2189
2190                 return true;
2191         }
2192
2193         /**
2194          * Update existing item content entries
2195          *
2196          * @param array $item      The item fields that are to be changed
2197          * @param array $condition The condition for finding the item content entries
2198          * @throws \Exception
2199          */
2200         private static function updateContent($item, $condition)
2201         {
2202                 // We have to select only the fields from the "item-content" table
2203                 $fields = [];
2204                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2205                         if (isset($item[$field])) {
2206                                 $fields[$field] = $item[$field];
2207                         }
2208                 }
2209
2210                 if (empty($fields)) {
2211                         // when there are no fields at all, just use the condition
2212                         // This is to ensure that we always store content.
2213                         $fields = $condition;
2214                 }
2215
2216                 Logger::log('Update content for ' . json_encode($condition));
2217
2218                 DBA::update('item-content', $fields, $condition, true);
2219         }
2220
2221         /**
2222          * Distributes public items to the receivers
2223          *
2224          * @param integer $itemid      Item ID that should be added
2225          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2226          * @throws \Exception
2227          */
2228         public static function distribute($itemid, $signed_text = '')
2229         {
2230                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2231                 $parent = self::selectFirst(['owner-id'], $condition);
2232                 if (!DBA::isResult($parent)) {
2233                         return;
2234                 }
2235
2236                 // Only distribute public items from native networks
2237                 $condition = ['id' => $itemid, 'uid' => 0,
2238                         'network' => array_merge(Protocol::FEDERATED ,['']),
2239                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2240                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2241                 if (!DBA::isResult($item)) {
2242                         return;
2243                 }
2244
2245                 $origin = $item['origin'];
2246
2247                 unset($item['id']);
2248                 unset($item['parent']);
2249                 unset($item['mention']);
2250                 unset($item['wall']);
2251                 unset($item['origin']);
2252                 unset($item['starred']);
2253
2254                 $users = [];
2255
2256                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2257                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2258                 if (!DBA::isResult($owner)) {
2259                         return;
2260                 }
2261
2262                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2263                 $contacts = DBA::select('contact', ['uid'], $condition);
2264                 while ($contact = DBA::fetch($contacts)) {
2265                         if ($contact['uid'] == 0) {
2266                                 continue;
2267                         }
2268
2269                         $users[$contact['uid']] = $contact['uid'];
2270                 }
2271                 DBA::close($contacts);
2272
2273                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2274                 $contacts = DBA::select('contact', ['uid'], $condition);
2275                 while ($contact = DBA::fetch($contacts)) {
2276                         if ($contact['uid'] == 0) {
2277                                 continue;
2278                         }
2279
2280                         $users[$contact['uid']] = $contact['uid'];
2281                 }
2282                 DBA::close($contacts);
2283
2284                 if (!empty($owner['alias'])) {
2285                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2286                         $contacts = DBA::select('contact', ['uid'], $condition);
2287                         while ($contact = DBA::fetch($contacts)) {
2288                                 if ($contact['uid'] == 0) {
2289                                         continue;
2290                                 }
2291
2292                                 $users[$contact['uid']] = $contact['uid'];
2293                         }
2294                         DBA::close($contacts);
2295                 }
2296
2297                 $origin_uid = 0;
2298
2299                 if ($item['uri'] != $item['parent-uri']) {
2300                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2301                         while ($parent = self::fetch($parents)) {
2302                                 $users[$parent['uid']] = $parent['uid'];
2303                                 if ($parent['origin'] && !$origin) {
2304                                         $origin_uid = $parent['uid'];
2305                                 }
2306                         }
2307                 }
2308
2309                 foreach ($users as $uid) {
2310                         if ($origin_uid == $uid) {
2311                                 $item['diaspora_signed_text'] = $signed_text;
2312                         }
2313                         self::storeForUser($itemid, $item, $uid);
2314                 }
2315         }
2316
2317         /**
2318          * Store public items for the receivers
2319          *
2320          * @param integer $itemid Item ID that should be added
2321          * @param array   $item   The item entry that will be stored
2322          * @param integer $uid    The user that will receive the item entry
2323          * @throws \Exception
2324          */
2325         private static function storeForUser($itemid, $item, $uid)
2326         {
2327                 $item['uid'] = $uid;
2328                 $item['origin'] = 0;
2329                 $item['wall'] = 0;
2330                 if ($item['uri'] == $item['parent-uri']) {
2331                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2332                 } else {
2333                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2334                 }
2335
2336                 if (empty($item['contact-id'])) {
2337                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2338                         if (!DBA::isResult($self)) {
2339                                 return;
2340                         }
2341                         $item['contact-id'] = $self['id'];
2342                 }
2343
2344                 /// @todo Handling of "event-id"
2345
2346                 $notify = false;
2347                 if ($item['uri'] == $item['parent-uri']) {
2348                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2349                         if (DBA::isResult($contact)) {
2350                                 $notify = self::isRemoteSelf($contact, $item);
2351                         }
2352                 }
2353
2354                 $distributed = self::insert($item, false, $notify, true);
2355
2356                 if (!$distributed) {
2357                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2358                 } else {
2359                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2360                 }
2361         }
2362
2363         /**
2364          * Add a shadow entry for a given item id that is a thread starter
2365          *
2366          * We store every public item entry additionally with the user id "0".
2367          * This is used for the community page and for the search.
2368          * It is planned that in the future we will store public item entries only once.
2369          *
2370          * @param integer $itemid Item ID that should be added
2371          * @throws \Exception
2372          */
2373         public static function addShadow($itemid)
2374         {
2375                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2376                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2377                 $item = self::selectFirst($fields, $condition);
2378
2379                 if (!DBA::isResult($item)) {
2380                         return;
2381                 }
2382
2383                 // is it already a copy?
2384                 if (($itemid == 0) || ($item['uid'] == 0)) {
2385                         return;
2386                 }
2387
2388                 // Is it a visible public post?
2389                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2390                         return;
2391                 }
2392
2393                 // is it an entry from a connector? Only add an entry for natively connected networks
2394                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2395                         return;
2396                 }
2397
2398                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2399                         return;
2400                 }
2401
2402                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2403
2404                 if (DBA::isResult($item)) {
2405                         // Preparing public shadow (removing user specific data)
2406                         $item['uid'] = 0;
2407                         unset($item['id']);
2408                         unset($item['parent']);
2409                         unset($item['wall']);
2410                         unset($item['mention']);
2411                         unset($item['origin']);
2412                         unset($item['starred']);
2413                         unset($item['postopts']);
2414                         unset($item['inform']);
2415                         if ($item['uri'] == $item['parent-uri']) {
2416                                 $item['contact-id'] = $item['owner-id'];
2417                         } else {
2418                                 $item['contact-id'] = $item['author-id'];
2419                         }
2420
2421                         $public_shadow = self::insert($item, false, false, true);
2422
2423                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2424                 }
2425         }
2426
2427         /**
2428          * Add a shadow entry for a given item id that is a comment
2429          *
2430          * This function does the same like the function above - but for comments
2431          *
2432          * @param integer $itemid Item ID that should be added
2433          * @throws \Exception
2434          */
2435         public static function addShadowPost($itemid)
2436         {
2437                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2438                 if (!DBA::isResult($item)) {
2439                         return;
2440                 }
2441
2442                 // Is it a toplevel post?
2443                 if ($item['id'] == $item['parent']) {
2444                         self::addShadow($itemid);
2445                         return;
2446                 }
2447
2448                 // Is this a shadow entry?
2449                 if ($item['uid'] == 0) {
2450                         return;
2451                 }
2452
2453                 // Is there a shadow parent?
2454                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2455                         return;
2456                 }
2457
2458                 // Is there already a shadow entry?
2459                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2460                         return;
2461                 }
2462
2463                 // Save "origin" and "parent" state
2464                 $origin = $item['origin'];
2465                 $parent = $item['parent'];
2466
2467                 // Preparing public shadow (removing user specific data)
2468                 $item['uid'] = 0;
2469                 unset($item['id']);
2470                 unset($item['parent']);
2471                 unset($item['wall']);
2472                 unset($item['mention']);
2473                 unset($item['origin']);
2474                 unset($item['starred']);
2475                 unset($item['postopts']);
2476                 unset($item['inform']);
2477                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2478
2479                 $public_shadow = self::insert($item, false, false, true);
2480
2481                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2482
2483                 // If this was a comment to a Diaspora post we don't get our comment back.
2484                 // This means that we have to distribute the comment by ourselves.
2485                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2486                         self::distribute($public_shadow);
2487                 }
2488         }
2489
2490         /**
2491          * Adds a language specification in a "language" element of given $arr.
2492          * Expects "body" element to exist in $arr.
2493          *
2494          * @param $item
2495          * @throws \Text_LanguageDetect_Exception
2496          */
2497         private static function addLanguageToItemArray(&$item)
2498         {
2499                 $naked_body = BBCode::toPlaintext($item['body'], false);
2500
2501                 $ld = new Text_LanguageDetect();
2502                 $ld->setNameMode(2);
2503                 $languages = $ld->detect($naked_body, 3);
2504
2505                 if (is_array($languages)) {
2506                         $item['language'] = json_encode($languages);
2507                 }
2508         }
2509
2510         /**
2511          * Creates an unique guid out of a given uri
2512          *
2513          * @param string $uri uri of an item entry
2514          * @param string $host hostname for the GUID prefix
2515          * @return string unique guid
2516          */
2517         public static function guidFromUri($uri, $host)
2518         {
2519                 // Our regular guid routine is using this kind of prefix as well
2520                 // We have to avoid that different routines could accidentally create the same value
2521                 $parsed = parse_url($uri);
2522
2523                 // We use a hash of the hostname as prefix for the guid
2524                 $guid_prefix = hash("crc32", $host);
2525
2526                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2527                 unset($parsed["scheme"]);
2528
2529                 // Glue it together to be able to make a hash from it
2530                 $host_id = implode("/", $parsed);
2531
2532                 // We could use any hash algorithm since it isn't a security issue
2533                 $host_hash = hash("ripemd128", $host_id);
2534
2535                 return $guid_prefix.$host_hash;
2536         }
2537
2538         /**
2539          * generate an unique URI
2540          *
2541          * @param integer $uid  User id
2542          * @param string  $guid An existing GUID (Otherwise it will be generated)
2543          *
2544          * @return string
2545          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2546          */
2547         public static function newURI($uid, $guid = "")
2548         {
2549                 if ($guid == "") {
2550                         $guid = System::createUUID();
2551                 }
2552
2553                 return DI::baseUrl()->get() . '/objects/' . $guid;
2554         }
2555
2556         /**
2557          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2558          *
2559          * This can be used to filter for inactive contacts.
2560          * Only do this for public postings to avoid privacy problems, since poco data is public.
2561          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2562          *
2563          * @param array $arr Contains the just posted item record
2564          * @throws \Exception
2565          */
2566         private static function updateContact($arr)
2567         {
2568                 // Unarchive the author
2569                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2570                 if (DBA::isResult($contact)) {
2571                         Contact::unmarkForArchival($contact);
2572                 }
2573
2574                 // Unarchive the contact if it's not our own contact
2575                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2576                 if (DBA::isResult($contact)) {
2577                         Contact::unmarkForArchival($contact);
2578                 }
2579
2580                 $update = (($arr['private'] != self::PRIVATE) && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2581
2582                 // Is it a forum? Then we don't care about the rules from above
2583                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2584                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2585                                 $update = true;
2586                         }
2587                 }
2588
2589                 if ($update) {
2590                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2591                                 ['id' => $arr['contact-id']]);
2592                 }
2593                 // Now do the same for the system wide contacts with uid=0
2594                 if ($arr['private'] != self::PRIVATE) {
2595                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2596                                 ['id' => $arr['owner-id']]);
2597
2598                         if ($arr['owner-id'] != $arr['author-id']) {
2599                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2600                                         ['id' => $arr['author-id']]);
2601                         }
2602                 }
2603         }
2604
2605         public static function setHashtags(&$item)
2606         {
2607                 $tags = BBCode::getTags($item["body"]);
2608
2609                 // No hashtags?
2610                 if (!count($tags)) {
2611                         return false;
2612                 }
2613
2614                 // What happens in [code], stays in [code]!
2615                 // escape the # and the [
2616                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2617                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2618                         function ($match) {
2619                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2620                                 $find = ['#', '['];
2621                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2622                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2623                         }, $item["body"]);
2624
2625                 // This sorting is important when there are hashtags that are part of other hashtags
2626                 // Otherwise there could be problems with hashtags like #test and #test2
2627                 rsort($tags);
2628
2629                 $URLSearchString = "^\[\]";
2630
2631                 // All hashtags should point to the home server if "local_tags" is activated
2632                 if (DI::config()->get('system', 'local_tags')) {
2633                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2634                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2635
2636                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2637                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2638                 }
2639
2640                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2641                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2642                         function ($match) {
2643                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2644                         }, $item["body"]);
2645
2646                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2647                         function ($match) {
2648                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2649                         }, $item["body"]);
2650
2651                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2652                         function ($match) {
2653                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2654                         }, $item["body"]);
2655
2656                 // Repair recursive urls
2657                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2658                                 "&num;$2", $item["body"]);
2659
2660                 foreach ($tags as $tag) {
2661                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2662                                 continue;
2663                         }
2664
2665                         $basetag = str_replace('_',' ',substr($tag,1));
2666                         $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2667
2668                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2669
2670                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2671                                 if (strlen($item["tag"])) {
2672                                         $item["tag"] = ',' . $item["tag"];
2673                                 }
2674                                 $item["tag"] = $newtag . $item["tag"];
2675                         }
2676                 }
2677
2678                 // Convert back the masked hashtags
2679                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2680
2681                 // Remember! What happens in [code], stays in [code]
2682                 // roleback the # and [
2683                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2684                         function ($match) {
2685                                 // we truly unESCape all sharp and leftsquarebracket
2686                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2687                                 $replace = ['#', '['];
2688                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2689                         }, $item["body"]);
2690         }
2691
2692         /**
2693          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2694          *
2695          * @param int $uid
2696          * @param int $item_id
2697          * @return boolean true if item was deleted, else false
2698          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2699          * @throws \ImagickException
2700          */
2701         private static function tagDeliver($uid, $item_id)
2702         {
2703                 $mention = false;
2704
2705                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2706                 if (!DBA::isResult($user)) {
2707                         return false;
2708                 }
2709
2710                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2711                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2712
2713                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2714                 if (!DBA::isResult($item)) {
2715                         return false;
2716                 }
2717
2718                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2719
2720                 /*
2721                  * Diaspora uses their own hardwired link URL in @-tags
2722                  * instead of the one we supply with webfinger
2723                  */
2724                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2725
2726                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2727                 if ($cnt) {
2728                         foreach ($matches as $mtch) {
2729                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2730                                         $mention = true;
2731                                         Logger::log('mention found: ' . $mtch[2]);
2732                                 }
2733                         }
2734                 }
2735
2736                 if (!$mention) {
2737                         if (($community_page || $prvgroup) &&
2738                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2739                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2740                                 DBA::delete('item', ['id' => $item_id]);
2741                                 return true;
2742                         }
2743                         return false;
2744                 }
2745
2746                 $arr = ['item' => $item, 'user' => $user];
2747
2748                 Hook::callAll('tagged', $arr);
2749
2750                 if (!$community_page && !$prvgroup) {
2751                         return false;
2752                 }
2753
2754                 /*
2755                  * tgroup delivery - setup a second delivery chain
2756                  * prevent delivery looping - only proceed
2757                  * if the message originated elsewhere and is a top-level post
2758                  */
2759                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2760                         return false;
2761                 }
2762
2763                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2764                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2765                 if (!DBA::isResult($self)) {
2766                         return false;
2767                 }
2768
2769                 $owner_id = Contact::getIdForURL($self['url']);
2770
2771                 // also reset all the privacy bits to the forum default permissions
2772
2773                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2774
2775                 $psid = PermissionSet::getIdFromACL(
2776                         $user['uid'],
2777                         $user['allow_cid'],
2778                         $user['allow_gid'],
2779                         $user['deny_cid'],
2780                         $user['deny_gid']
2781                 );
2782
2783                 $forum_mode = ($prvgroup ? 2 : 1);
2784
2785                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2786                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2787                 self::update($fields, ['id' => $item_id]);
2788
2789                 self::updateThread($item_id);
2790
2791                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2792
2793                 return false;
2794         }
2795
2796         public static function isRemoteSelf($contact, &$datarray)
2797         {
2798                 if (!$contact['remote_self']) {
2799                         return false;
2800                 }
2801
2802                 // Prevent the forwarding of posts that are forwarded
2803                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2804                         Logger::log('Already forwarded', Logger::DEBUG);
2805                         return false;
2806                 }
2807
2808                 // Prevent to forward already forwarded posts
2809                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2810                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2811                         return false;
2812                 }
2813
2814                 // Only forward posts
2815                 if ($datarray["verb"] != Activity::POST) {
2816                         Logger::log('No post', Logger::DEBUG);
2817                         return false;
2818                 }
2819
2820                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2821                         Logger::log('Not public', Logger::DEBUG);
2822                         return false;
2823                 }
2824
2825                 $datarray2 = $datarray;
2826                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2827                 if ($contact['remote_self'] == 2) {
2828                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2829                                         ['uid' => $contact['uid'], 'self' => true]);
2830                         if (DBA::isResult($self)) {
2831                                 $datarray['contact-id'] = $self["id"];
2832
2833                                 $datarray['owner-name'] = $self["name"];
2834                                 $datarray['owner-link'] = $self["url"];
2835                                 $datarray['owner-avatar'] = $self["thumb"];
2836
2837                                 $datarray['author-name']   = $datarray['owner-name'];
2838                                 $datarray['author-link']   = $datarray['owner-link'];
2839                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2840
2841                                 unset($datarray['edited']);
2842
2843                                 unset($datarray['network']);
2844                                 unset($datarray['owner-id']);
2845                                 unset($datarray['author-id']);
2846                         }
2847
2848                         if ($contact['network'] != Protocol::FEED) {
2849                                 $datarray["guid"] = System::createUUID();
2850                                 unset($datarray["plink"]);
2851                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2852                                 $datarray["parent-uri"] = $datarray["uri"];
2853                                 $datarray["thr-parent"] = $datarray["uri"];
2854                                 $datarray["extid"] = Protocol::DFRN;
2855                                 $urlpart = parse_url($datarray2['author-link']);
2856                                 $datarray["app"] = $urlpart["host"];
2857                         } else {
2858                                 $datarray['private'] = self::PUBLIC;
2859                         }
2860                 }
2861
2862                 if ($contact['network'] != Protocol::FEED) {
2863                         // Store the original post
2864                         $result = self::insert($datarray2, false, false);
2865                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2866                 } else {
2867                         $datarray["app"] = "Feed";
2868                         $result = true;
2869                 }
2870
2871                 // Trigger automatic reactions for addons
2872                 $datarray['api_source'] = true;
2873
2874                 // We have to tell the hooks who we are - this really should be improved
2875                 $_SESSION["authenticated"] = true;
2876                 $_SESSION["uid"] = $contact['uid'];
2877
2878                 return $result;
2879         }
2880
2881         /**
2882          *
2883          * @param string $s
2884          * @param int    $uid
2885          * @param array  $item
2886          * @param int    $cid
2887          * @return string
2888          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2889          * @throws \ImagickException
2890          */
2891         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2892         {
2893                 if (DI::config()->get('system', 'disable_embedded')) {
2894                         return $s;
2895                 }
2896
2897                 Logger::log('check for photos', Logger::DEBUG);
2898                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2899
2900                 $orig_body = $s;
2901                 $new_body = '';
2902
2903                 $img_start = strpos($orig_body, '[img');
2904                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2905                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2906
2907                 while (($img_st_close !== false) && ($img_len !== false)) {
2908                         $img_st_close++; // make it point to AFTER the closing bracket
2909                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2910
2911                         Logger::log('found photo ' . $image, Logger::DEBUG);
2912
2913                         if (stristr($image, $site . '/photo/')) {
2914                                 // Only embed locally hosted photos
2915                                 $replace = false;
2916                                 $i = basename($image);
2917                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2918                                 $x = strpos($i, '-');
2919
2920                                 if ($x) {
2921                                         $res = substr($i, $x + 1);
2922                                         $i = substr($i, 0, $x);
2923                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2924                                         if (DBA::isResult($photo)) {
2925                                                 /*
2926                                                  * Check to see if we should replace this photo link with an embedded image
2927                                                  * 1. No need to do so if the photo is public
2928                                                  * 2. If there's a contact-id provided, see if they're in the access list
2929                                                  *    for the photo. If so, embed it.
2930                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2931                                                  *    permissions, regardless of order but first check to see if they're an exact
2932                                                  *    match to save some processing overhead.
2933                                                  */
2934                                                 if (self::hasPermissions($photo)) {
2935                                                         if ($cid) {
2936                                                                 $recips = self::enumeratePermissions($photo);
2937                                                                 if (in_array($cid, $recips)) {
2938                                                                         $replace = true;
2939                                                                 }
2940                                                         } elseif ($item) {
2941                                                                 if (self::samePermissions($uid, $item, $photo)) {
2942                                                                         $replace = true;
2943                                                                 }
2944                                                         }
2945                                                 }
2946                                                 if ($replace) {
2947                                                         $photo_img = Photo::getImageForPhoto($photo);
2948                                                         // If a custom width and height were specified, apply before embedding
2949                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2950                                                                 Logger::log('scaling photo', Logger::DEBUG);
2951
2952                                                                 $width = intval($match[1]);
2953                                                                 $height = intval($match[2]);
2954
2955                                                                 $photo_img->scaleDown(max($width, $height));
2956                                                         }
2957
2958                                                         $data = $photo_img->asString();
2959                                                         $type = $photo_img->getType();
2960
2961                                                         Logger::log('replacing photo', Logger::DEBUG);
2962                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2963                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2964                                                 }
2965                                         }
2966                                 }
2967                         }
2968
2969                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2970                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2971                         if ($orig_body === false) {
2972                                 $orig_body = '';
2973                         }
2974
2975                         $img_start = strpos($orig_body, '[img');
2976                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2977                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2978                 }
2979
2980                 $new_body = $new_body . $orig_body;
2981
2982                 return $new_body;
2983         }
2984
2985         private static function hasPermissions($obj)
2986         {
2987                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2988                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2989         }
2990
2991         private static function samePermissions($uid, $obj1, $obj2)
2992         {
2993                 // first part is easy. Check that these are exactly the same.
2994                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2995                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2996                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2997                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2998                         return true;
2999                 }
3000
3001                 // This is harder. Parse all the permissions and compare the resulting set.
3002                 $recipients1 = self::enumeratePermissions($obj1);
3003                 $recipients2 = self::enumeratePermissions($obj2);
3004                 sort($recipients1);
3005                 sort($recipients2);
3006
3007                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
3008                 return ($recipients1 == $recipients2);
3009         }
3010
3011         /**
3012          * Returns an array of contact-ids that are allowed to see this object
3013          *
3014          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
3015          * @param bool  $check_dead Prunes unavailable contacts from the result
3016          * @return array
3017          * @throws \Exception
3018          */
3019         public static function enumeratePermissions(array $obj, bool $check_dead = false)
3020         {
3021                 $aclFormater = DI::aclFormatter();
3022
3023                 $allow_people = $aclFormater->expand($obj['allow_cid']);
3024                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
3025                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
3026                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
3027                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
3028                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
3029                 $recipients   = array_diff($recipients, $deny);
3030                 return $recipients;
3031         }
3032
3033         public static function getFeedTags($item)
3034         {
3035                 $ret = [];
3036                 $matches = false;
3037                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3038                 if ($cnt) {
3039                         for ($x = 0; $x < $cnt; $x ++) {
3040                                 if ($matches[1][$x]) {
3041                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
3042                                 }
3043                         }
3044                 }
3045                 $matches = false;
3046                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3047                 if ($cnt) {
3048                         for ($x = 0; $x < $cnt; $x ++) {
3049                                 if ($matches[1][$x]) {
3050                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3051                                 }
3052                         }
3053                 }
3054                 return $ret;
3055         }
3056
3057         public static function expire($uid, $days, $network = "", $force = false)
3058         {
3059                 if (!$uid || ($days < 1)) {
3060                         return;
3061                 }
3062
3063                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3064                         $uid, GRAVITY_PARENT];
3065
3066                 /*
3067                  * $expire_network_only = save your own wall posts
3068                  * and just expire conversations started by others
3069                  */
3070                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3071
3072                 if ($expire_network_only) {
3073                         $condition[0] .= " AND NOT `wall`";
3074                 }
3075
3076                 if ($network != "") {
3077                         $condition[0] .= " AND `network` = ?";
3078                         $condition[] = $network;
3079                 }
3080
3081                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3082                 $condition[] = $days;
3083
3084                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3085
3086                 if (!DBA::isResult($items)) {
3087                         return;
3088                 }
3089
3090                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3091
3092                 // Forcing expiring of items - but not notes and marked items
3093                 if ($force) {
3094                         $expire_items = true;
3095                 }
3096
3097                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3098                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3099                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3100
3101                 $expired = 0;
3102
3103                 while ($item = Item::fetch($items)) {
3104                         // don't expire filed items
3105
3106                         if (strpos($item['file'], '[') !== false) {
3107                                 continue;
3108                         }
3109
3110                         // Only expire posts, not photos and photo comments
3111
3112                         if (!$expire_photos && strlen($item['resource-id'])) {
3113                                 continue;
3114                         } elseif (!$expire_starred && intval($item['starred'])) {
3115                                 continue;
3116                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3117                                 continue;
3118                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3119                                 continue;
3120                         }
3121
3122                         self::markForDeletionById($item['id'], PRIORITY_LOW);
3123
3124                         ++$expired;
3125                 }
3126                 DBA::close($items);
3127                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3128         }
3129
3130         public static function firstPostDate($uid, $wall = false)
3131         {
3132                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3133                 $params = ['order' => ['received' => false]];
3134                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3135                 if (DBA::isResult($thread)) {
3136                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3137                 }
3138                 return false;
3139         }
3140
3141         /**
3142          * add/remove activity to an item
3143          *
3144          * Toggle activities as like,dislike,attend of an item
3145          *
3146          * @param string $item_id
3147          * @param string $verb
3148          *            Activity verb. One of
3149          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3150          *            attendno, unattendno, attendmaybe, unattendmaybe
3151          * @return bool
3152          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3153          * @throws \ImagickException
3154          * @hook  'post_local_end'
3155          *            array $arr
3156          *            'post_id' => ID of posted item
3157          */
3158         public static function performActivity($item_id, $verb)
3159         {
3160                 if (!Session::isAuthenticated()) {
3161                         return false;
3162                 }
3163
3164                 switch ($verb) {
3165                         case 'like':
3166                         case 'unlike':
3167                                 $activity = Activity::LIKE;
3168                                 break;
3169                         case 'dislike':
3170                         case 'undislike':
3171                                 $activity = Activity::DISLIKE;
3172                                 break;
3173                         case 'attendyes':
3174                         case 'unattendyes':
3175                                 $activity = Activity::ATTEND;
3176                                 break;
3177                         case 'attendno':
3178                         case 'unattendno':
3179                                 $activity = Activity::ATTENDNO;
3180                                 break;
3181                         case 'attendmaybe':
3182                         case 'unattendmaybe':
3183                                 $activity = Activity::ATTENDMAYBE;
3184                                 break;
3185                         case 'follow':
3186                         case 'unfollow':
3187                                 $activity = Activity::FOLLOW;
3188                                 break;
3189                         default:
3190                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3191                                 return false;
3192                 }
3193
3194                 // Enable activity toggling instead of on/off
3195                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3196
3197                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3198
3199                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3200                 if (!DBA::isResult($item)) {
3201                         Logger::log('like: unknown item ' . $item_id);
3202                         return false;
3203                 }
3204
3205                 $item_uri = $item['uri'];
3206
3207                 $uid = $item['uid'];
3208                 if (($uid == 0) && local_user()) {
3209                         $uid = local_user();
3210                 }
3211
3212                 if (!Security::canWriteToUserWall($uid)) {
3213                         Logger::log('like: unable to write on wall ' . $uid);
3214                         return false;
3215                 }
3216
3217                 // Retrieves the local post owner
3218                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3219                 if (!DBA::isResult($owner_self_contact)) {
3220                         Logger::log('like: unknown owner ' . $uid);
3221                         return false;
3222                 }
3223
3224                 // Retrieve the current logged in user's public contact
3225                 $author_id = public_contact();
3226
3227                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3228                 if (!DBA::isResult($author_contact)) {
3229                         Logger::log('like: unknown author ' . $author_id);
3230                         return false;
3231                 }
3232
3233                 // Contact-id is the uid-dependant author contact
3234                 if (local_user() == $uid) {
3235                         $item_contact_id = $owner_self_contact['id'];
3236                 } else {
3237                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3238                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3239                         if (!DBA::isResult($item_contact)) {
3240                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3241                                 return false;
3242                         }
3243                 }
3244
3245                 // Look for an existing verb row
3246                 // event participation are essentially radio toggles. If you make a subsequent choice,
3247                 // we need to eradicate your first choice.
3248                 if ($event_verb_flag) {
3249                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3250
3251                         // Translate to the index based activity index
3252                         $activities = [];
3253                         foreach ($verbs as $verb) {
3254                                 $activities[] = self::activityToIndex($verb);
3255                         }
3256                 } else {
3257                         $activities = self::activityToIndex($activity);
3258                 }
3259
3260                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3261                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3262
3263                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3264
3265                 // If it exists, mark it as deleted
3266                 if (DBA::isResult($like_item)) {
3267                         self::markForDeletionById($like_item['id']);
3268
3269                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3270                                 return true;
3271                         }
3272                 }
3273
3274                 // Verb is "un-something", just trying to delete existing entries
3275                 if (strpos($verb, 'un') === 0) {
3276                         return true;
3277                 }
3278
3279                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3280
3281                 $new_item = [
3282                         'guid'          => System::createUUID(),
3283                         'uri'           => self::newURI($item['uid']),
3284                         'uid'           => $item['uid'],
3285                         'contact-id'    => $item_contact_id,
3286                         'wall'          => $item['wall'],
3287                         'origin'        => 1,
3288                         'network'       => Protocol::DFRN,
3289                         'gravity'       => GRAVITY_ACTIVITY,
3290                         'parent'        => $item['id'],
3291                         'parent-uri'    => $item['uri'],
3292                         'thr-parent'    => $item['uri'],
3293                         'owner-id'      => $author_id,
3294                         'author-id'     => $author_id,
3295                         'body'          => $activity,
3296                         'verb'          => $activity,
3297                         'object-type'   => $objtype,
3298                         'allow_cid'     => $item['allow_cid'],
3299                         'allow_gid'     => $item['allow_gid'],
3300                         'deny_cid'      => $item['deny_cid'],
3301                         'deny_gid'      => $item['deny_gid'],
3302                         'visible'       => 1,
3303                         'unseen'        => 1,
3304                 ];
3305
3306                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3307                 if (!empty($signed)) {
3308                         $new_item['diaspora_signed_text'] = json_encode($signed);
3309                 }
3310
3311                 $new_item_id = self::insert($new_item);
3312
3313                 // If the parent item isn't visible then set it to visible
3314                 if (!$item['visible']) {
3315                         self::update(['visible' => true], ['id' => $item['id']]);
3316                 }
3317
3318                 $new_item['id'] = $new_item_id;
3319
3320                 Hook::callAll('post_local_end', $new_item);
3321
3322                 return true;
3323         }
3324
3325         private static function addThread($itemid, $onlyshadow = false)
3326         {
3327                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3328                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3329                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3330                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3331                 $item = self::selectFirst($fields, $condition);
3332
3333                 if (!DBA::isResult($item)) {
3334                         return;
3335                 }
3336
3337                 $item['iid'] = $itemid;
3338
3339                 if (!$onlyshadow) {
3340                         $result = DBA::insert('thread', $item);
3341
3342                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3343                 }
3344         }
3345
3346         private static function updateThread($itemid, $setmention = false)
3347         {
3348                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3349                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3350                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3351                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3352
3353                 $item = self::selectFirst($fields, $condition);
3354                 if (!DBA::isResult($item)) {
3355                         return;
3356                 }
3357
3358                 if ($setmention) {
3359                         $item["mention"] = 1;
3360                 }
3361
3362                 $fields = [];
3363
3364                 foreach ($item as $field => $data) {
3365                         if (!in_array($field, ["guid"])) {
3366                                 $fields[$field] = $data;
3367                         }
3368                 }
3369
3370                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3371
3372                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3373         }
3374
3375         private static function deleteThread($itemid, $itemuri = "")
3376         {
3377                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3378                 if (!DBA::isResult($item)) {
3379                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3380                         return;
3381                 }
3382
3383                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3384
3385                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3386
3387                 if ($itemuri != "") {
3388                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3389                         if (!self::exists($condition)) {
3390                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3391                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3392                         }
3393                 }
3394         }
3395
3396         public static function getPermissionsSQLByUserId($owner_id)
3397         {
3398                 $local_user = local_user();
3399                 $remote_user = Session::getRemoteContactID($owner_id);
3400
3401                 /*
3402                  * Construct permissions
3403                  *
3404                  * default permissions - anonymous user
3405                  */
3406                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3407
3408                 // Profile owner - everything is visible
3409                 if ($local_user && ($local_user == $owner_id)) {
3410                         $sql = '';
3411                 } elseif ($remote_user) {
3412                         /*
3413                          * Authenticated visitor. Unless pre-verified,
3414                          * check that the contact belongs to this $owner_id
3415                          * and load the groups the visitor belongs to.
3416                          * If pre-verified, the caller is expected to have already
3417                          * done this and passed the groups into this function.
3418                          */
3419                         $set = PermissionSet::get($owner_id, $remote_user);
3420
3421                         if (!empty($set)) {
3422                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3423                         } else {
3424                                 $sql_set = '';
3425                         }
3426
3427                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3428                 }
3429
3430                 return $sql;
3431         }
3432
3433         /**
3434          * get translated item type
3435          *
3436          * @param $item
3437          * @return string
3438          */
3439         public static function postType($item)
3440         {
3441                 if (!empty($item['event-id'])) {
3442                         return DI::l10n()->t('event');
3443                 } elseif (!empty($item['resource-id'])) {
3444                         return DI::l10n()->t('photo');
3445                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3446                         return DI::l10n()->t('activity');
3447                 } elseif ($item['id'] != $item['parent']) {
3448                         return DI::l10n()->t('comment');
3449                 }
3450
3451                 return DI::l10n()->t('post');
3452         }
3453
3454         /**
3455          * Sets the "rendered-html" field of the provided item
3456          *
3457          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3458          *
3459          * @param array $item
3460          * @param bool  $update
3461          *
3462          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3463          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3464          */
3465         public static function putInCache(&$item, $update = false)
3466         {
3467                 $body = $item["body"];
3468
3469                 $rendered_hash = $item['rendered-hash'] ?? '';
3470                 $rendered_html = $item['rendered-html'] ?? '';
3471
3472                 if ($rendered_hash == ''
3473                         || $rendered_html == ""
3474                         || $rendered_hash != hash("md5", $item["body"])
3475                         || DI::config()->get("system", "ignore_cache")
3476                 ) {
3477                         self::addRedirToImageTags($item);
3478
3479                         $item["rendered-html"] = BBCode::convert($item["body"]);
3480                         $item["rendered-hash"] = hash("md5", $item["body"]);
3481
3482                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3483                         Hook::callAll('put_item_in_cache', $hook_data);
3484                         $item['rendered-html'] = $hook_data['rendered-html'];
3485                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3486                         unset($hook_data);
3487
3488                         // Force an update if the generated values differ from the existing ones
3489                         if ($rendered_hash != $item["rendered-hash"]) {
3490                                 $update = true;
3491                         }
3492
3493                         // Only compare the HTML when we forcefully ignore the cache
3494                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3495                                 $update = true;
3496                         }
3497
3498                         if ($update && !empty($item["id"])) {
3499                                 self::update(
3500                                         [
3501                                                 'rendered-html' => $item["rendered-html"],
3502                                                 'rendered-hash' => $item["rendered-hash"]
3503                                         ],
3504                                         ['id' => $item["id"]]
3505                                 );
3506                         }
3507                 }
3508
3509                 $item["body"] = $body;
3510         }
3511
3512         /**
3513          * Find any non-embedded images in private items and add redir links to them
3514          *
3515          * @param array &$item The field array of an item row
3516          */
3517         private static function addRedirToImageTags(array &$item)
3518         {
3519                 $app = DI::app();
3520
3521                 $matches = [];
3522                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3523                 if ($cnt) {
3524                         foreach ($matches as $mtch) {
3525                                 if (strpos($mtch[1], '/redir') !== false) {
3526                                         continue;
3527                                 }
3528
3529                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3530                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3531                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3532                                 }
3533                         }
3534                 }
3535         }
3536
3537         /**
3538          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3539          * If attach is true, also add icons for item attachments.
3540          *
3541          * @param array   $item
3542          * @param boolean $attach
3543          * @param boolean $is_preview
3544          * @return string item body html
3545          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3546          * @throws \ImagickException
3547          * @hook  prepare_body_init item array before any work
3548          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3549          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3550          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3551          */
3552         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3553         {
3554                 $a = DI::app();
3555                 Hook::callAll('prepare_body_init', $item);
3556
3557                 // In order to provide theme developers more possibilities, event items
3558                 // are treated differently.
3559                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3560                         $ev = Event::getItemHTML($item);
3561                         return $ev;
3562                 }
3563
3564                 $tags = Term::populateTagsFromItem($item);
3565
3566                 $item['tags'] = $tags['tags'];
3567                 $item['hashtags'] = $tags['hashtags'];
3568                 $item['mentions'] = $tags['mentions'];
3569
3570                 // Compile eventual content filter reasons
3571                 $filter_reasons = [];
3572                 if (!$is_preview && public_contact() != $item['author-id']) {
3573                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3574                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3575                         }
3576
3577                         $hook_data = [
3578                                 'item' => $item,
3579                                 'filter_reasons' => $filter_reasons
3580                         ];
3581                         Hook::callAll('prepare_body_content_filter', $hook_data);
3582                         $filter_reasons = $hook_data['filter_reasons'];
3583                         unset($hook_data);
3584                 }
3585
3586                 // Update the cached values if there is no "zrl=..." on the links.
3587                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3588
3589                 // Or update it if the current viewer is the intented viewer.
3590                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3591                         $update = true;
3592                 }
3593
3594                 self::putInCache($item, $update);
3595                 $s = $item["rendered-html"];
3596
3597                 $hook_data = [
3598                         'item' => $item,
3599                         'html' => $s,
3600                         'preview' => $is_preview,
3601                         'filter_reasons' => $filter_reasons
3602                 ];
3603                 Hook::callAll('prepare_body', $hook_data);
3604                 $s = $hook_data['html'];
3605                 unset($hook_data);
3606
3607                 if (!$attach) {
3608                         // Replace the blockquotes with quotes that are used in mails.
3609                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3610                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3611                         return $s;
3612                 }
3613
3614                 $as = '';
3615                 $vhead = false;
3616                 $matches = [];
3617                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3618                 foreach ($matches as $mtch) {
3619                         $mime = $mtch[3];
3620
3621                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3622
3623                         if (strpos($mime, 'video') !== false) {
3624                                 if (!$vhead) {
3625                                         $vhead = true;
3626                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3627                                 }
3628
3629                                 $url_parts = explode('/', $the_url);
3630                                 $id = end($url_parts);
3631                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3632                                         '$video' => [
3633                                                 'id'     => $id,
3634                                                 'title'  => DI::l10n()->t('View Video'),
3635                                                 'src'    => $the_url,
3636                                                 'mime'   => $mime,
3637                                         ],
3638                                 ]);
3639                         }
3640
3641                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3642                         if ($filetype) {
3643                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3644                                 $filesubtype = str_replace('.', '-', $filesubtype);
3645                         } else {
3646                                 $filetype = 'unkn';
3647                                 $filesubtype = 'unkn';
3648                         }
3649
3650                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3651                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3652
3653                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3654                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3655                 }
3656
3657                 if ($as != '') {
3658                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3659                 }
3660
3661                 // Map.
3662                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3663                         $x = Map::byCoordinates(trim($item['coord']));
3664                         if ($x) {
3665                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3666                         }
3667                 }
3668
3669                 // Replace friendica image url size with theme preference.
3670                 if (!empty($a->theme_info['item_image_size'])) {
3671                         $ps = $a->theme_info['item_image_size'];
3672                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3673                 }
3674
3675                 $s = HTML::applyContentFilter($s, $filter_reasons);
3676
3677                 $hook_data = ['item' => $item, 'html' => $s];
3678                 Hook::callAll('prepare_body_final', $hook_data);
3679
3680                 return $hook_data['html'];
3681         }
3682
3683         /**
3684          * get private link for item
3685          *
3686          * @param array $item
3687          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3688          * @throws \Exception
3689          */
3690         public static function getPlink($item)
3691         {
3692                 $a = DI::app();
3693
3694                 if ($a->user['nickname'] != "") {
3695                         $ret = [
3696                                 'href' => "display/" . $item['guid'],
3697                                 'orig' => "display/" . $item['guid'],
3698                                 'title' => DI::l10n()->t('View on separate page'),
3699                                 'orig_title' => DI::l10n()->t('view on separate page'),
3700                         ];
3701
3702                         if (!empty($item['plink'])) {
3703                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3704                                 $ret["title"] = DI::l10n()->t('link to source');
3705                         }
3706
3707                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3708                         $ret = [
3709                                 'href' => $item['plink'],
3710                                 'orig' => $item['plink'],
3711                                 'title' => DI::l10n()->t('link to source'),
3712                         ];
3713                 } else {
3714                         $ret = [];
3715                 }
3716
3717                 return $ret;
3718         }
3719
3720         /**
3721          * Is the given item array a post that is sent as starting post to a forum?
3722          *
3723          * @param array $item
3724          * @param array $owner
3725          *
3726          * @return boolean "true" when it is a forum post
3727          */
3728         public static function isForumPost(array $item, array $owner = [])
3729         {
3730                 if (empty($owner)) {
3731                         $owner = User::getOwnerDataById($item['uid']);
3732                         if (empty($owner)) {
3733                                 return false;
3734                         }
3735                 }
3736
3737                 if (($item['author-id'] == $item['owner-id']) ||
3738                         ($owner['id'] == $item['contact-id']) ||
3739                         ($item['uri'] != $item['parent-uri']) ||
3740                         $item['origin']) {
3741                         return false;
3742                 }
3743
3744                 return Contact::isForum($item['contact-id']);
3745         }
3746
3747         /**
3748          * Search item id for given URI or plink
3749          *
3750          * @param string $uri
3751          * @param integer $uid
3752          *
3753          * @return integer item id
3754          */
3755         public static function searchByLink($uri, $uid = 0)
3756         {
3757                 $ssl_uri = str_replace('http://', 'https://', $uri);
3758                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3759
3760                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3761                 if (DBA::isResult($item)) {
3762                         return $item['id'];
3763                 }
3764
3765                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3766                 if (!DBA::isResult($itemcontent)) {
3767                         return 0;
3768                 }
3769
3770                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3771                 if (!DBA::isResult($itemuri)) {
3772                         return 0;
3773                 }
3774
3775                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3776                 if (DBA::isResult($item)) {
3777                         return $item['id'];
3778                 }
3779
3780                 return 0;
3781         }
3782
3783         /**
3784          * Return the URI for a link to the post
3785          *
3786          * @param string $uri URI or link to post
3787          *
3788          * @return string URI
3789          */
3790         public static function getURIByLink(string $uri)
3791         {
3792                 $ssl_uri = str_replace('http://', 'https://', $uri);
3793                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3794
3795                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3796                 if (DBA::isResult($item)) {
3797                         return $item['uri'];
3798                 }
3799
3800                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3801                 if (!DBA::isResult($itemcontent)) {
3802                         return '';
3803                 }
3804
3805                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3806                 if (DBA::isResult($itemuri)) {
3807                         return $itemuri['uri'];
3808                 }
3809
3810                 return '';
3811         }
3812
3813         /**
3814          * Fetches item for given URI or plink
3815          *
3816          * @param string $uri
3817          * @param integer $uid
3818          *
3819          * @return integer item id
3820          */
3821         public static function fetchByLink($uri, $uid = 0)
3822         {
3823                 $item_id = self::searchByLink($uri, $uid);
3824                 if (!empty($item_id)) {
3825                         return $item_id;
3826                 }
3827
3828                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3829                         $item_id = self::searchByLink($fetched_uri, $uid);
3830                 } else {
3831                         $item_id = Diaspora::fetchByURL($uri);
3832                 }
3833
3834                 if (!empty($item_id)) {
3835                         return $item_id;
3836                 }
3837
3838                 return 0;
3839         }
3840
3841         /**
3842          * Return share data from an item array (if the item is shared item)
3843          * We are providing the complete Item array, because at some time in the future
3844          * we hopefully will define these values not in the body anymore but in some item fields.
3845          * This function is meant to replace all similar functions in the system.
3846          *
3847          * @param array $item
3848          *
3849          * @return array with share information
3850          */
3851         public static function getShareArray($item)
3852         {
3853                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3854                         return [];
3855                 }
3856
3857                 $attribute_string = $matches[2];
3858                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3859                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3860                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3861                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3862                         }
3863                 }
3864                 return $attributes;
3865         }
3866
3867         /**
3868          * Fetch item information for shared items from the original items and adds it.
3869          *
3870          * @param array $item
3871          *
3872          * @return array item array with data from the original item
3873          */
3874         public static function addShareDataFromOriginal($item)
3875         {
3876                 $shared = self::getShareArray($item);
3877                 if (empty($shared)) {
3878                         return $item;
3879                 }
3880
3881                 // Real reshares always have got a GUID.
3882                 if (empty($shared['guid'])) {
3883                         return $item;
3884                 }
3885
3886                 $uid = $item['uid'] ?? 0;
3887
3888                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3889                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3890                 if (!DBA::isResult($shared_item)) {
3891                         if (empty($shared['link'])) {
3892                                 return $item;
3893                         }
3894
3895                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3896                         $id = self::fetchByLink($shared['link'], $uid);
3897                         if (empty($id)) {
3898                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3899                                 return $item;
3900                         }
3901
3902                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3903                         if (!DBA::isResult($shared_item)) {
3904                                 return $item;
3905                         }
3906                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3907                 } else {
3908                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3909                 }
3910
3911                 if (!empty($shared_item['title'])) {
3912                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3913                         unset($shared_item['title']);
3914                 } else {
3915                         $body = $shared_item['body'];
3916                 }
3917
3918                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3919                 unset($shared_item['body']);
3920
3921                 return array_merge($item, $shared_item);
3922         }
3923 }