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\Model\Tag;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\Database\DBStructure;
  36 use Friendica\DI;
  37 use Friendica\Model\Post;
  38 use Friendica\Protocol\Activity;
  39 use Friendica\Protocol\ActivityPub;
  40 use Friendica\Protocol\Diaspora;
  41 use Friendica\Util\DateTimeFormat;
  42 use Friendica\Util\Map;
  43 use Friendica\Util\Network;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use Friendica\Repository\PermissionSet as RepPermissionSet;
  47 use LanguageDetection\Language;
  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_TAG = 64;
  61         const PT_TO = 65;
  62         const PT_CC = 66;
  63         const PT_BTO = 67;
  64         const PT_BCC = 68;
  65         const PT_FOLLOWER = 69;
  66         const PT_ANNOUNCEMENT = 70;
  67         const PT_COMMENT = 71;
  68         const PT_STORED = 72;
  69         const PT_GLOBAL = 73;
  70         const PT_RELAY = 74;
  71         const PT_FETCHED = 75;
  72         const PT_PERSONAL_NOTE = 128;
  73
  74         // Field list that is used to display the items
  75         const DISPLAY_FIELDLIST = [
  76                 'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  77                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  78                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'language',
  79                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  80                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  81                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  82                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  83                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type',
  84                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  85                 'writable', 'self', 'cid', 'alias', 'pinned',
  86                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  87                 'event-summary', 'event-desc', 'event-location', 'event-type',
  88                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  89                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  90         ];
  91
  92         // Field list that is used to deliver items via the protocols
  93         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  94                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  95                         'private', 'title', 'body', 'location', 'coord', 'app',
  96                         'deleted', 'extid', 'post-type', 'gravity',
  97                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  98                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  99                         'signed_text', 'signature', 'signer', 'network'];
 100
 101         // Field list for "item-content" table that is mixed with the item table
 102         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
 103                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
 104                         'object-type', 'object', 'target-type', 'target', 'plink'];
 105
 106         // Field list for "item-content" table that is not present in the "item" table
 107         const CONTENT_FIELDLIST = ['language', 'raw-body'];
 108
 109         // All fields in the item table
 110         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 111                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 112                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'psid',
 113                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 114                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 115                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 116                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 117                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 118                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 119                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 120                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 121                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 122
 123         // List of all verbs that don't need additional content data.
 124         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 125         const ACTIVITIES = [
 126                 Activity::LIKE, Activity::DISLIKE,
 127                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 128                 Activity::FOLLOW,
 129                 Activity::ANNOUNCE];
 130
 131         const PUBLIC = 0;
 132         const PRIVATE = 1;
 133         const UNLISTED = 2;
 134
 135         const TABLES = ['item', 'user-item', 'item-content', 'post-delivery-data', 'diaspora-interaction'];
 136
 137         private static $legacy_mode = null;
 138
 139         private static function getItemFields()
 140         {
 141                 $definition = DBStructure::definition('', false);
 142
 143                 $postfields = [];
 144                 foreach (self::TABLES as $table) {
 145                         $postfields[$table] = array_keys($definition[$table]['fields']);
 146                 }
 147
 148                 return $postfields;
 149         }
 150
 151         public static function isLegacyMode()
 152         {
 153                 if (is_null(self::$legacy_mode)) {
 154                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 155                 }
 156
 157                 return self::$legacy_mode;
 158         }
 159
 160         /**
 161          * Set the pinned state of an item
 162          *
 163          * @param integer $iid    Item ID
 164          * @param integer $uid    User ID
 165          * @param boolean $pinned Pinned state
 166          */
 167         public static function setPinned(int $iid, int $uid, bool $pinned)
 168         {
 169                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 170         }
 171
 172         /**
 173          * Get the pinned state
 174          *
 175          * @param integer $iid Item ID
 176          * @param integer $uid User ID
 177          *
 178          * @return boolean pinned state
 179          */
 180         public static function getPinned(int $iid, int $uid)
 181         {
 182                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 183                 if (!DBA::isResult($useritem)) {
 184                         return false;
 185                 }
 186                 return (bool)$useritem['pinned'];
 187         }
 188
 189         /**
 190          * Select pinned rows from the item table for a given user
 191          *
 192          * @param integer $uid       User ID
 193          * @param array   $selected  Array of selected fields, empty for all
 194          * @param array   $condition Array of fields for condition
 195          * @param array   $params    Array of several parameters
 196          *
 197          * @return boolean|object
 198          * @throws \Exception
 199          */
 200         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 201         {
 202                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 203                 if (!DBA::isResult($useritems)) {
 204                         return $useritems;
 205                 }
 206
 207                 $pinned = [];
 208                 while ($useritem = DBA::fetch($useritems)) {
 209                         $pinned[] = $useritem['iid'];
 210                 }
 211                 DBA::close($useritems);
 212
 213                 if (empty($pinned)) {
 214                         return [];
 215                 }
 216
 217                 $condition = DBA::mergeConditions(['iid' => $pinned], $condition);
 218
 219                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 220         }
 221
 222         /**
 223          * Fetch a single item row
 224          *
 225          * @param mixed $stmt statement object
 226          * @return array current row
 227          */
 228         public static function fetch($stmt)
 229         {
 230                 $row = DBA::fetch($stmt);
 231
 232                 if (is_bool($row)) {
 233                         return $row;
 234                 }
 235
 236                 $row = DBA::castFields('item', $row);
 237
 238                 // ---------------------- Transform item structure data ----------------------
 239
 240                 // We prefer the data from the user's contact over the public one
 241                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 242                         ($row['author-link'] == $row['contact-link'])) {
 243                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 244                                 $row['author-avatar'] = $row['contact-avatar'];
 245                         }
 246                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 247                                 $row['author-name'] = $row['contact-name'];
 248                         }
 249                 }
 250
 251                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 252                         ($row['owner-link'] == $row['contact-link'])) {
 253                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 254                                 $row['owner-avatar'] = $row['contact-avatar'];
 255                         }
 256                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 257                                 $row['owner-name'] = $row['contact-name'];
 258                         }
 259                 }
 260
 261                 // We can always comment on posts from these networks
 262                 if (array_key_exists('writable', $row) &&
 263                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 264                         $row['writable'] = true;
 265                 }
 266
 267                 // ---------------------- Transform item content data ----------------------
 268
 269                 // Fetch data from the item-content table whenever there is content there
 270                 if (self::isLegacyMode()) {
 271                         $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 272                         foreach ($legacy_fields as $field) {
 273                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 274                                         $row[$field] = $row['internal-item-' . $field];
 275                                 }
 276                                 unset($row['internal-item-' . $field]);
 277                         }
 278                 }
 279
 280                 if (array_key_exists('verb', $row)) {
 281                         if (!is_null($row['internal-verb'])) {
 282                                 $row['verb'] = $row['internal-verb'];
 283                         }
 284
 285                         if (in_array($row['verb'], self::ACTIVITIES)) {
 286                                 if (array_key_exists('title', $row)) {
 287                                         $row['title'] = '';
 288                                 }
 289                                 if (array_key_exists('body', $row)) {
 290                                         $row['body'] = $row['verb'];
 291                                 }
 292                                 if (array_key_exists('object', $row)) {
 293                                         $row['object'] = '';
 294                                 }
 295                                 if (array_key_exists('object-type', $row)) {
 296                                         $row['object-type'] = Activity\ObjectType::NOTE;
 297                                 }
 298                         } elseif (in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 299                                 // Posts don't have a target - but having tags or files.
 300                                 if (array_key_exists('target', $row)) {
 301                                         $row['target'] = '';
 302                                 }
 303                         }
 304                 }
 305
 306                 if (array_key_exists('vid', $row) && is_null($row['vid']) && !empty($row['verb'])) {
 307                         $row['vid'] = Verb::getID($row['verb']);
 308                 }
 309
 310                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 311                         // Build the file string out of the term entries
 312                         if (array_key_exists('file', $row) && empty($row['file'])) {
 313                                 $row['file'] = Post\Category::getTextByURIId($row['internal-uri-id'], $row['internal-uid']);
 314                         }
 315                 }
 316
 317                 if ($row['internal-psid'] == RepPermissionSet::PUBLIC) {
 318                         if (array_key_exists('allow_cid', $row)) {
 319                                 $row['allow_cid'] = '';
 320                         }
 321                         if (array_key_exists('allow_gid', $row)) {
 322                                 $row['allow_gid'] = '';
 323                         }
 324                         if (array_key_exists('deny_cid', $row)) {
 325                                 $row['deny_cid'] = '';
 326                         }
 327                         if (array_key_exists('deny_gid', $row)) {
 328                                 $row['deny_gid'] = '';
 329                         }
 330                 }
 331
 332                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 333                         $row['ignored'] = $row['internal-user-ignored'];
 334                 }
 335
 336                 // Remove internal fields
 337                 unset($row['internal-network']);
 338                 unset($row['internal-uri-id']);
 339                 unset($row['internal-uid']);
 340                 unset($row['internal-psid']);
 341                 unset($row['internal-verb']);
 342                 unset($row['internal-user-ignored']);
 343                 unset($row['interaction']);
 344
 345                 return $row;
 346         }
 347
 348         /**
 349          * Fills an array with data from an item query
 350          *
 351          * @param object $stmt statement object
 352          * @param bool   $do_close
 353          * @return array Data array
 354          */
 355         public static function inArray($stmt, $do_close = true) {
 356                 if (is_bool($stmt)) {
 357                         return $stmt;
 358                 }
 359
 360                 $data = [];
 361                 while ($row = self::fetch($stmt)) {
 362                         $data[] = $row;
 363                 }
 364                 if ($do_close) {
 365                         DBA::close($stmt);
 366                 }
 367                 return $data;
 368         }
 369
 370         /**
 371          * Check if item data exists
 372          *
 373          * @param array $condition array of fields for condition
 374          *
 375          * @return boolean Are there rows for that condition?
 376          * @throws \Exception
 377          */
 378         public static function exists($condition) {
 379                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 380
 381                 if (is_bool($stmt)) {
 382                         $retval = $stmt;
 383                 } else {
 384                         $retval = (DBA::numRows($stmt) > 0);
 385                 }
 386
 387                 DBA::close($stmt);
 388
 389                 return $retval;
 390         }
 391
 392         /**
 393          * Retrieve a single record from the item table for a given user and returns it in an associative array
 394          *
 395          * @param integer $uid User ID
 396          * @param array   $selected
 397          * @param array   $condition
 398          * @param array   $params
 399          * @return bool|array
 400          * @throws \Exception
 401          * @see   DBA::select
 402          */
 403         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 404         {
 405                 $params['uid'] = $uid;
 406
 407                 if (empty($selected)) {
 408                         $selected = Item::DISPLAY_FIELDLIST;
 409                 }
 410
 411                 return self::selectFirst($selected, $condition, $params);
 412         }
 413
 414         /**
 415          * Select rows from the item table for a given user
 416          *
 417          * @param integer $uid       User ID
 418          * @param array   $selected  Array of selected fields, empty for all
 419          * @param array   $condition Array of fields for condition
 420          * @param array   $params    Array of several parameters
 421          *
 422          * @return boolean|object
 423          * @throws \Exception
 424          */
 425         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 426         {
 427                 $params['uid'] = $uid;
 428
 429                 if (empty($selected)) {
 430                         $selected = Item::DISPLAY_FIELDLIST;
 431                 }
 432
 433                 return self::select($selected, $condition, $params);
 434         }
 435
 436         /**
 437          * Retrieve a single record from the item table and returns it in an associative array
 438          *
 439          * @param array $fields
 440          * @param array $condition
 441          * @param array $params
 442          * @return bool|array
 443          * @throws \Exception
 444          * @see   DBA::select
 445          */
 446         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 447         {
 448                 $params['limit'] = 1;
 449
 450                 $result = self::select($fields, $condition, $params);
 451
 452                 if (is_bool($result)) {
 453                         return $result;
 454                 } else {
 455                         $row = self::fetch($result);
 456                         DBA::close($result);
 457                         return $row;
 458                 }
 459         }
 460
 461         /**
 462          * Select rows from the item table and returns them as an array
 463          *
 464          * @param array $selected  Array of selected fields, empty for all
 465          * @param array $condition Array of fields for condition
 466          * @param array $params    Array of several parameters
 467          *
 468          * @return array
 469          * @throws \Exception
 470          */
 471         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 472         {
 473                 $result = self::select($fields, $condition, $params);
 474
 475                 if (is_bool($result)) {
 476                         return [];
 477                 }
 478
 479                 $data = [];
 480                 while ($row = self::fetch($result)) {
 481                         $data[] = $row;
 482                 }
 483                 DBA::close($result);
 484
 485                 return $data;
 486         }
 487
 488         /**
 489          * Select rows from the item table
 490          *
 491          * @param array $selected  Array of selected fields, empty for all
 492          * @param array $condition Array of fields for condition
 493          * @param array $params    Array of several parameters
 494          *
 495          * @return boolean|object
 496          * @throws \Exception
 497          */
 498         public static function select(array $selected = [], array $condition = [], $params = [])
 499         {
 500                 $uid = 0;
 501                 $usermode = false;
 502
 503                 if (isset($params['uid'])) {
 504                         $uid = $params['uid'];
 505                         $usermode = true;
 506                 }
 507
 508                 $fields = self::fieldlist($usermode);
 509
 510                 $select_fields = self::constructSelectFields($fields, $selected);
 511
 512                 $condition_string = DBA::buildCondition($condition);
 513
 514                 $condition_string = self::addTablesToFields($condition_string, $fields);
 515
 516                 if ($usermode) {
 517                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 518                 }
 519
 520                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 521
 522                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 523
 524                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 525
 526                 return DBA::p($sql, $condition);
 527         }
 528
 529         /**
 530          * Select rows from the starting post in the item table
 531          *
 532          * @param integer $uid       User ID
 533          * @param array   $selected
 534          * @param array   $condition Array of fields for condition
 535          * @param array   $params    Array of several parameters
 536          *
 537          * @return boolean|object
 538          * @throws \Exception
 539          */
 540         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 541         {
 542                 $params['uid'] = $uid;
 543
 544                 if (empty($selected)) {
 545                         $selected = Item::DISPLAY_FIELDLIST;
 546                 }
 547
 548                 return self::selectThread($selected, $condition, $params);
 549         }
 550
 551         /**
 552          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 553          *
 554          * @param integer $uid User ID
 555          * @param array   $selected
 556          * @param array   $condition
 557          * @param array   $params
 558          * @return bool|array
 559          * @throws \Exception
 560          * @see   DBA::select
 561          */
 562         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 563         {
 564                 $params['uid'] = $uid;
 565
 566                 if (empty($selected)) {
 567                         $selected = Item::DISPLAY_FIELDLIST;
 568                 }
 569
 570                 return self::selectFirstThread($selected, $condition, $params);
 571         }
 572
 573         /**
 574          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 575          *
 576          * @param array $fields
 577          * @param array $condition
 578          * @param array $params
 579          * @return bool|array
 580          * @throws \Exception
 581          * @see   DBA::select
 582          */
 583         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 584         {
 585                 $params['limit'] = 1;
 586                 $result = self::selectThread($fields, $condition, $params);
 587
 588                 if (is_bool($result)) {
 589                         return $result;
 590                 } else {
 591                         $row = self::fetch($result);
 592                         DBA::close($result);
 593                         return $row;
 594                 }
 595         }
 596
 597         /**
 598          * Select rows from the starting post in the item table
 599          *
 600          * @param array $selected  Array of selected fields, empty for all
 601          * @param array $condition Array of fields for condition
 602          * @param array $params    Array of several parameters
 603          *
 604          * @return boolean|object
 605          * @throws \Exception
 606          */
 607         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 608         {
 609                 $uid = 0;
 610                 $usermode = false;
 611
 612                 if (isset($params['uid'])) {
 613                         $uid = $params['uid'];
 614                         $usermode = true;
 615                 }
 616
 617                 $fields = self::fieldlist($usermode);
 618
 619                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 620
 621                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 622                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 623                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 624                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 625
 626                 $select_fields = self::constructSelectFields($fields, $selected);
 627
 628                 $condition_string = DBA::buildCondition($condition);
 629
 630                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 631                 $condition_string = self::addTablesToFields($condition_string, $fields);
 632
 633                 if ($usermode) {
 634                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 635                 }
 636
 637                 $param_string = DBA::buildParameter($params);
 638                 $param_string = self::addTablesToFields($param_string, $threadfields);
 639                 $param_string = self::addTablesToFields($param_string, $fields);
 640
 641                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 642
 643                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 644
 645                 return DBA::p($sql, $condition);
 646         }
 647
 648         /**
 649          * Returns a list of fields that are associated with the item table
 650          *
 651          * @param $usermode
 652          * @return array field list
 653          */
 654         private static function fieldlist($usermode)
 655         {
 656                 $fields = [];
 657
 658                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 659                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid', 'causer-id',
 660                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 661                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 662                         'resource-id', 'event-id', 'post-type', 'file',
 663                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 664                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 665                         'id' => 'item_id', 'network', 'icid',
 666                         'uri-id' => 'internal-uri-id', 'uid' => 'internal-uid',
 667                         'network' => 'internal-network', 'psid' => 'internal-psid'];
 668
 669                 if ($usermode) {
 670                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 671                 }
 672
 673                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 674
 675                 $fields['post-delivery-data'] = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, Post\DeliveryData::FIELD_LIST);
 676
 677                 $fields['verb'] = ['name' => 'internal-verb'];
 678
 679                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 680
 681                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 682                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 683
 684                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 685                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 686
 687                 $fields['causer'] = ['url' => 'causer-link', 'name' => 'causer-name', 'addr' => 'causer-addr',
 688                         'thumb' => 'causer-avatar', 'nick' => 'causer-nick', 'network' => 'causer-network',
 689                         'contact-type' => 'causer-contact-type'];
 690
 691                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 692                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 693                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 694
 695                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network', 'author-id' => 'parent-author-id'];
 696
 697                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name',
 698                         'network' => 'parent-author-network'];
 699
 700                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 701                         'start' => 'event-start','finish' => 'event-finish',
 702                         'summary' => 'event-summary','desc' => 'event-desc',
 703                         'location' => 'event-location', 'type' => 'event-type',
 704                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 705                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 706
 707                 $fields['diaspora-interaction'] = ['interaction', 'interaction' => 'signed_text'];
 708
 709                 return $fields;
 710         }
 711
 712         /**
 713          * Returns SQL condition for the "select" functions
 714          *
 715          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 716          *
 717          * @return string SQL condition
 718          */
 719         private static function condition($thread_mode)
 720         {
 721                 if ($thread_mode) {
 722                         $master_table = "`thread`";
 723                 } else {
 724                         $master_table = "`item`";
 725                 }
 726                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 727                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 728                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 729                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 730                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 731                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 732                         GRAVITY_PARENT, GRAVITY_PARENT);
 733         }
 734
 735         /**
 736          * Returns all needed "JOIN" commands for the "select" functions
 737          *
 738          * @param integer $uid          User ID
 739          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 740          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 741          *
 742          * @param         $user_mode
 743          * @return string The SQL joins for the "select" functions
 744          */
 745         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 746         {
 747                 if ($thread_mode) {
 748                         $master_table = "`thread`";
 749                         $master_table_key = "`thread`.`iid`";
 750                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 751                 } else {
 752                         $master_table = "`item`";
 753                         $master_table_key = "`item`.`id`";
 754                         $joins = '';
 755                 }
 756
 757                 if ($user_mode) {
 758                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 759                                 AND NOT `contact`.`blocked`
 760                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 761                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 762                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 763                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 764                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 765                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 766                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 767                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 768                 } else {
 769                         if (strpos($sql_commands, "`contact`.") !== false) {
 770                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 771                         }
 772                         if (strpos($sql_commands, "`author`.") !== false) {
 773                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 774                         }
 775                         if (strpos($sql_commands, "`owner`.") !== false) {
 776                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 777                         }
 778                 }
 779                 if (strpos($sql_commands, "`causer`.") !== false) {
 780                         $joins .= " LEFT JOIN `contact` AS `causer` ON `causer`.`id` = `item`.`causer-id`";
 781                 }
 782
 783                 if (strpos($sql_commands, "`group_member`.") !== false) {
 784                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 785                 }
 786
 787                 if (strpos($sql_commands, "`user`.") !== false) {
 788                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 789                 }
 790
 791                 if (strpos($sql_commands, "`event`.") !== false) {
 792                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 793                 }
 794
 795                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 796                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 797                 }
 798
 799                 if (strpos($sql_commands, "`item-content`.") !== false) {
 800                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 801                 }
 802
 803                 if (strpos($sql_commands, "`post-delivery-data`.") !== false) {
 804                         $joins .= " LEFT JOIN `post-delivery-data` ON `post-delivery-data`.`uri-id` = `item`.`uri-id` AND `item`.`origin`";
 805                 }
 806
 807                 if (strpos($sql_commands, "`verb`.") !== false) {
 808                         $joins .= " LEFT JOIN `verb` ON `verb`.`id` = `item`.`vid`";
 809                 }
 810
 811                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 812                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 813                 }
 814
 815                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-item-author`.") !== false)) {
 816                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 817
 818                         if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 819                                 $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 820                         }
 821                 }
 822
 823                 return $joins;
 824         }
 825
 826         /**
 827          * Add the field list for the "select" functions
 828          *
 829          * @param array $fields The field definition array
 830          * @param array $selected The array with the selected fields from the "select" functions
 831          *
 832          * @return string The field list
 833          */
 834         private static function constructSelectFields(array $fields, array $selected)
 835         {
 836                 if (!empty($selected)) {
 837                         $selected = array_merge($selected, ['internal-uri-id', 'internal-uid', 'internal-psid', 'internal-network']);
 838                 }
 839
 840                 if (in_array('verb', $selected)) {
 841                         $selected = array_merge($selected, ['internal-verb']);
 842                 }
 843
 844                 if (in_array('ignored', $selected)) {
 845                         $selected[] = 'internal-user-ignored';
 846                 }
 847
 848                 $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 849
 850                 $selection = [];
 851                 foreach ($fields as $table => $table_fields) {
 852                         foreach ($table_fields as $field => $select) {
 853                                 if (empty($selected) || in_array($select, $selected)) {
 854                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 855                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 856                                         }
 857                                         if (is_int($field)) {
 858                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 859                                         } else {
 860                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 861                                         }
 862                                 }
 863                         }
 864                 }
 865                 return implode(", ", $selection);
 866         }
 867
 868         /**
 869          * add table definition to fields in an SQL query
 870          *
 871          * @param string $query SQL query
 872          * @param array $fields The field definition array
 873          *
 874          * @return string the changed SQL query
 875          */
 876         private static function addTablesToFields($query, $fields)
 877         {
 878                 foreach ($fields as $table => $table_fields) {
 879                         foreach ($table_fields as $alias => $field) {
 880                                 if (is_int($alias)) {
 881                                         $replace_field = $field;
 882                                 } else {
 883                                         $replace_field = $alias;
 884                                 }
 885
 886                                 $search = "/([^\.])`" . $field . "`/i";
 887                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 888                                 $query = preg_replace($search, $replace, $query);
 889                         }
 890                 }
 891                 return $query;
 892         }
 893
 894         /**
 895          * Update existing item entries
 896          *
 897          * @param array $fields    The fields that are to be changed
 898          * @param array $condition The condition for finding the item entries
 899          *
 900          * In the future we may have to change permissions as well.
 901          * Then we had to add the user id as third parameter.
 902          *
 903          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 904          *
 905          * @return integer|boolean number of affected rows - or "false" if there was an error
 906          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 907          */
 908         public static function update(array $fields, array $condition)
 909         {
 910                 if (empty($condition) || empty($fields)) {
 911                         return false;
 912                 }
 913
 914                 $data_fields = $fields;
 915
 916                 // To ensure the data integrity we do it in an transaction
 917                 DBA::transaction();
 918
 919                 // We cannot simply expand the condition to check for origin entries
 920                 // The condition needn't to be a simple array but could be a complex condition.
 921                 // And we have to execute this query before the update to ensure to fetch the same data.
 922                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'icid', 'uid', 'file'], $condition);
 923
 924                 $content_fields = [];
 925                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 926                         if (isset($fields[$field])) {
 927                                 $content_fields[$field] = $fields[$field];
 928                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 929                                         unset($fields[$field]);
 930                                 } else {
 931                                         $fields[$field] = null;
 932                                 }
 933                         }
 934                 }
 935
 936                 $delivery_data = Post\DeliveryData::extractFields($fields);
 937
 938                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 939                 foreach ($clear_fields as $field) {
 940                         if (array_key_exists($field, $fields)) {
 941                                 $fields[$field] = null;
 942                         }
 943                 }
 944
 945                 if (array_key_exists('file', $fields)) {
 946                         $files = $fields['file'];
 947                         $fields['file'] = null;
 948                 } else {
 949                         $files = null;
 950                 }
 951
 952                 if (!empty($content_fields['verb'])) {
 953                         $fields['vid'] = Verb::getID($content_fields['verb']);
 954                 }
 955
 956                 if (!empty($fields)) {
 957                         $success = DBA::update('item', $fields, $condition);
 958
 959                         if (!$success) {
 960                                 DBA::close($items);
 961                                 DBA::rollback();
 962                                 return false;
 963                         }
 964                 }
 965
 966                 // When there is no content for the "old" item table, this will count the fetched items
 967                 $rows = DBA::affectedRows();
 968
 969                 $notify_items = [];
 970
 971                 while ($item = DBA::fetch($items)) {
 972                         Post\User::update($item['uri-id'], $item['uid'], $data_fields);
 973
 974                         if (empty($content_fields['verb']) || !in_array($content_fields['verb'], self::ACTIVITIES)) {
 975                                 if (!empty($content_fields['body'])) {
 976                                         $content_fields['raw-body'] = trim($content_fields['raw-body'] ?? $content_fields['body']);
 977
 978                                         // Remove all media attachments from the body and store them in the post-media table
 979                                         $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 980                                         $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 981                                 }
 982
 983                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 984
 985                                 if (empty($item['icid'])) {
 986                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 987                                         if (DBA::isResult($item_content)) {
 988                                                 $item_fields = ['icid' => $item_content['id']];
 989                                                 // Clear all fields in the item table that have a content in the item-content table
 990                                                 if (self::isLegacyMode()) {
 991                                                         foreach ($item_content as $field => $content) {
 992                                                                 if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($content)) {
 993                                                                         $item_fields[$field] = null;
 994                                                                 }
 995                                                         }
 996                                                 }
 997                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 998                                         }
 999                                 }
1000                         }
1001
1002                         if (!is_null($files)) {
1003                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $files);
1004                                 if (!empty($item['file'])) {
1005                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1006                                 }
1007                         }
1008
1009                         if (!empty($fields['attach'])) {
1010                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
1011                         }
1012
1013                         Post\DeliveryData::update($item['uri-id'], $delivery_data);
1014
1015                         self::updateThread($item['id']);
1016
1017                         // We only need to notfiy others when it is an original entry from us.
1018                         // Only call the notifier when the item has some content relevant change.
1019                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1020                                 $notify_items[] = $item['id'];
1021                         }
1022                 }
1023
1024                 DBA::close($items);
1025                 DBA::commit();
1026
1027                 foreach ($notify_items as $notify_item) {
1028                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1029                 }
1030
1031                 return $rows;
1032         }
1033
1034         /**
1035          * Delete an item and notify others about it - if it was ours
1036          *
1037          * @param array   $condition The condition for finding the item entries
1038          * @param integer $priority  Priority for the notification
1039          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1040          */
1041         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
1042         {
1043                 $items = self::select(['id'], $condition);
1044                 while ($item = self::fetch($items)) {
1045                         self::markForDeletionById($item['id'], $priority);
1046                 }
1047                 DBA::close($items);
1048         }
1049
1050         /**
1051          * Delete an item for an user and notify others about it - if it was ours
1052          *
1053          * @param array   $condition The condition for finding the item entries
1054          * @param integer $uid       User who wants to delete this item
1055          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1056          */
1057         public static function deleteForUser($condition, $uid)
1058         {
1059                 if ($uid == 0) {
1060                         return;
1061                 }
1062
1063                 $items = self::select(['id', 'uid', 'uri-id'], $condition);
1064                 while ($item = self::fetch($items)) {
1065                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
1066
1067                         // "Deleting" global items just means hiding them
1068                         if ($item['uid'] == 0) {
1069                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1070                         } elseif ($item['uid'] == $uid) {
1071                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
1072                         } else {
1073                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1074                         }
1075                 }
1076                 DBA::close($items);
1077         }
1078
1079         /**
1080          * Mark an item for deletion, delete related data and notify others about it - if it was ours
1081          *
1082          * @param integer $item_id
1083          * @param integer $priority Priority for the notification
1084          *
1085          * @return boolean success
1086          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1087          */
1088         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
1089         {
1090                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
1091                 // locate item to be deleted
1092                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri', 'origin',
1093                         'deleted', 'file', 'resource-id', 'event-id',
1094                         'verb', 'object-type', 'object', 'target', 'contact-id',
1095                         'icid', 'psid', 'gravity'];
1096                 $item = self::selectFirst($fields, ['id' => $item_id]);
1097                 if (!DBA::isResult($item)) {
1098                         Logger::info('Item not found.', ['id' => $item_id]);
1099                         return false;
1100                 }
1101
1102                 if ($item['deleted']) {
1103                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1104                         return false;
1105                 }
1106
1107                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1108                 if (!DBA::isResult($parent)) {
1109                         $parent = ['origin' => false];
1110                 }
1111
1112                 // clean up categories and tags so they don't end up as orphans
1113
1114                 $matches = [];
1115                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1116
1117                 if ($cnt) {
1118                         foreach ($matches as $mtch) {
1119                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1120                         }
1121                 }
1122
1123                 $matches = [];
1124
1125                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1126
1127                 if ($cnt) {
1128                         foreach ($matches as $mtch) {
1129                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1130                         }
1131                 }
1132
1133                 /*
1134                  * If item is a link to a photo resource, nuke all the associated photos
1135                  * (visitors will not have photo resources)
1136                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1137                  * generate a resource-id and therefore aren't intimately linked to the item.
1138                  */
1139                 /// @TODO: this should first check if photo is used elsewhere
1140                 if (strlen($item['resource-id'])) {
1141                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1142                 }
1143
1144                 // If item is a link to an event, delete the event.
1145                 if (intval($item['event-id'])) {
1146                         Event::delete($item['event-id']);
1147                 }
1148
1149                 // If item has attachments, drop them
1150                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
1151                 foreach($attachments as $attachment) {
1152                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
1153                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1154                         }
1155                 }
1156
1157                 // Set the item to "deleted"
1158                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1159                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1160
1161                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
1162                 self::deleteThread($item['id'], $item['parent-uri']);
1163
1164                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1165                         self::markForDeletion(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1166                 }
1167
1168                 Post\DeliveryData::delete($item['uri-id']);
1169
1170                 // When the permission set will be used in photo and events as well,
1171                 // this query here needs to be extended.
1172                 // @todo Currently deactivated. We need the permission set in the deletion process.
1173                 // This is a reminder to add the removal somewhere else.
1174                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1175                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1176                 //}
1177
1178                 // If it's the parent of a comment thread, kill all the kids
1179                 if ($item['gravity'] == GRAVITY_PARENT) {
1180                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1181                 }
1182
1183                 // Is it our comment and/or our thread?
1184                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
1185                         // When we delete the original post we will delete all existing copies on the server as well
1186                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1187
1188                         // send the notification upstream/downstream
1189                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1190                 } elseif ($item['uid'] != 0) {
1191                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
1192
1193                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1194                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1195                         if (DBA::isResult($global_item)) {
1196                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1197                         }
1198                 }
1199
1200                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1201
1202                 return true;
1203         }
1204
1205
1206         private static function guid($item, $notify)
1207         {
1208                 if (!empty($item['guid'])) {
1209                         return Strings::escapeTags(trim($item['guid']));
1210                 }
1211
1212                 if ($notify) {
1213                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1214                         // We add the hash of our own host because our host is the original creator of the post.
1215                         $prefix_host = DI::baseUrl()->getHostname();
1216                 } else {
1217                         $prefix_host = '';
1218
1219                         // We are only storing the post so we create a GUID from the original hostname.
1220                         if (!empty($item['author-link'])) {
1221                                 $parsed = parse_url($item['author-link']);
1222                                 if (!empty($parsed['host'])) {
1223                                         $prefix_host = $parsed['host'];
1224                                 }
1225                         }
1226
1227                         if (empty($prefix_host) && !empty($item['plink'])) {
1228                                 $parsed = parse_url($item['plink']);
1229                                 if (!empty($parsed['host'])) {
1230                                         $prefix_host = $parsed['host'];
1231                                 }
1232                         }
1233
1234                         if (empty($prefix_host) && !empty($item['uri'])) {
1235                                 $parsed = parse_url($item['uri']);
1236                                 if (!empty($parsed['host'])) {
1237                                         $prefix_host = $parsed['host'];
1238                                 }
1239                         }
1240
1241                         // Is it in the format data@host.tld? - Used for mail contacts
1242                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1243                                 $mailparts = explode('@', $item['author-link']);
1244                                 $prefix_host = array_pop($mailparts);
1245                         }
1246                 }
1247
1248                 if (!empty($item['plink'])) {
1249                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1250                 } elseif (!empty($item['uri'])) {
1251                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1252                 } else {
1253                         $guid = System::createUUID(hash('crc32', $prefix_host));
1254                 }
1255
1256                 return $guid;
1257         }
1258
1259         private static function contactId($item)
1260         {
1261                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1262                         return $item['contact-id'];
1263                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1264                         return $item['contact-id'];
1265                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1266                         return $item['author-id'];
1267                 } elseif (!empty($item['contact-id'])) {
1268                         return $item['contact-id'];
1269                 } else {
1270                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1271                         if (!empty($contact_id)) {
1272                                 return $contact_id;
1273                         }
1274                 }
1275                 return $item['author-id'];
1276         }
1277
1278         // This function will finally cover most of the preparation functionality in mod/item.php
1279         public static function prepare(&$item)
1280         {
1281                 /*
1282                  * @TODO: Unused code triggering inspection errors
1283                  *
1284                 $data = BBCode::getAttachmentData($item['body']);
1285                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1286                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1287                         $posttype = Item::PT_PAGE;
1288                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1289                 }
1290                  */
1291         }
1292
1293         /**
1294          * Write an item array into a spool file to be inserted later.
1295          * This command is called whenever there are issues storing an item.
1296          *
1297          * @param array $item The item fields that are to be inserted
1298          * @throws \Exception
1299          */
1300         private static function spool($orig_item)
1301         {
1302                 // Now we store the data in the spool directory
1303                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1304                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1305
1306                 $spoolpath = get_spoolpath();
1307                 if ($spoolpath != "") {
1308                         $spool = $spoolpath . '/' . $file;
1309
1310                         file_put_contents($spool, json_encode($orig_item));
1311                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1312                 }
1313         }
1314
1315         /**
1316          * Check if the item array is a duplicate
1317          *
1318          * @param array $item
1319          * @return boolean is it a duplicate?
1320          */
1321         private static function isDuplicate(array $item)
1322         {
1323                 // Checking if there is already an item with the same guid
1324                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1325                 if (self::exists($condition)) {
1326                         Logger::notice('Found already existing item', [
1327                                 'guid' => $item['guid'],
1328                                 'uid' => $item['uid'],
1329                                 'network' => $item['network']
1330                         ]);
1331                         return true;
1332                 }
1333
1334                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1335                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1336                 if (self::exists($condition)) {
1337                         Logger::notice('duplicated item with the same uri found.', $item);
1338                         return true;
1339                 }
1340
1341                 // On Friendica and Diaspora the GUID is unique
1342                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1343                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1344                         if (self::exists($condition)) {
1345                                 Logger::notice('duplicated item with the same guid found.', $item);
1346                                 return true;
1347                         }
1348                 } elseif ($item['network'] == Protocol::OSTATUS) {
1349                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1350                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1351                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1352                         if (self::exists($condition)) {
1353                                 Logger::notice('duplicated item with the same body found.', $item);
1354                                 return true;
1355                         }
1356                 }
1357
1358                 /*
1359                  * Check for already added items.
1360                  * There is a timing issue here that sometimes creates double postings.
1361                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1362                  */
1363                 if (($item['uid'] == 0) && self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1364                         Logger::notice('Global item already stored.', ['uri' => $item['uri'], 'network' => $item['network']]);
1365                         return true;
1366                 }
1367
1368                 return false;
1369         }
1370
1371         /**
1372          * Check if the item array is valid
1373          *
1374          * @param array $item
1375          * @return boolean item is valid
1376          */
1377         public static function isValid(array $item)
1378         {
1379                 // When there is no content then we don't post it
1380                 if ($item['body'] . $item['title'] == '') {
1381                         Logger::notice('No body, no title.');
1382                         return false;
1383                 }
1384
1385                 // check for create date and expire time
1386                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1387
1388                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
1389                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1390                         $expire_interval = $user['expire'];
1391                 }
1392
1393                 if (($expire_interval > 0) && !empty($item['created'])) {
1394                         $expire_date = time() - ($expire_interval * 86400);
1395                         $created_date = strtotime($item['created']);
1396                         if ($created_date < $expire_date) {
1397                                 Logger::notice('Item created before expiration interval.', [
1398                                         'created' => date('c', $created_date),
1399                                         'expired' => date('c', $expire_date),
1400                                         '$item' => $item
1401                                 ]);
1402                                 return false;
1403                         }
1404                 }
1405
1406                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
1407                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1408                         return false;
1409                 }
1410
1411                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1412                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1413                         return false;
1414                 }
1415
1416                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
1417                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1418                         return false;
1419                 }
1420
1421                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1422                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1423                         return false;
1424                 }
1425
1426                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
1427                         return false;
1428                 }
1429
1430                 if ($item['verb'] == Activity::FOLLOW) {
1431                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
1432                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1433                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
1434                                 return false;
1435                         }
1436
1437                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1438                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1439                         if (self::exists($condition)) {
1440                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1441                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
1442                                 return false;
1443                         }
1444                 }
1445
1446                 return true;
1447         }
1448
1449         /**
1450          * Return the id of the given item array if it has been stored before
1451          *
1452          * @param array $item
1453          * @return integer item id
1454          */
1455         private static function getDuplicateID(array $item)
1456         {
1457                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1458                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1459                                 trim($item['uri']), $item['uid'],
1460                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1461                         $existing = self::selectFirst(['id', 'network'], $condition);
1462                         if (DBA::isResult($existing)) {
1463                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1464                                 if ($item['uid'] != 0) {
1465                                         Logger::notice('Item already existed for user', [
1466                                                 'uri' => $item['uri'],
1467                                                 'uid' => $item['uid'],
1468                                                 'network' => $item['network'],
1469                                                 'existing_id' => $existing["id"],
1470                                                 'existing_network' => $existing["network"]
1471                                         ]);
1472                                 }
1473
1474                                 return $existing["id"];
1475                         }
1476                 }
1477                 return 0;
1478         }
1479
1480         /**
1481          * Fetch top-level parent data for the given item array
1482          *
1483          * @param array $item
1484          * @return array item array with parent data
1485          * @throws \Exception
1486          */
1487         private static function getTopLevelParent(array $item)
1488         {
1489                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
1490                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1491                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1492                 $condition = ['uri' => $item['thr-parent'], 'uid' => $item['uid']];
1493                 $params = ['order' => ['id' => false]];
1494                 $parent = self::selectFirst($fields, $condition, $params);
1495
1496                 if (!DBA::isResult($parent)) {
1497                         Logger::notice('item parent was not found - ignoring item', ['thr-parent' => $item['thr-parent'], 'uid' => $item['uid']]);
1498                         return [];
1499                 }
1500
1501                 if ($parent['uri'] == $parent['parent-uri']) {
1502                         return $parent;
1503                 }
1504
1505                 $condition = ['uri' => $parent['parent-uri'],
1506                         'parent-uri' => $parent['parent-uri'],
1507                         'uid' => $parent['uid']];
1508                 $params = ['order' => ['id' => false]];
1509                 $toplevel_parent = self::selectFirst($fields, $condition, $params);
1510                 if (!DBA::isResult($toplevel_parent)) {
1511                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri' => $parent['parent-uri'], 'uid' => $parent['uid']]);
1512                         return [];
1513                 }
1514
1515                 return $toplevel_parent;
1516         }
1517
1518         /**
1519          * Get the gravity for the given item array
1520          *
1521          * @param array $item
1522          * @return integer gravity
1523          */
1524         private static function getGravity(array $item)
1525         {
1526                 $activity = DI::activity();
1527
1528                 if (isset($item['gravity'])) {
1529                         return intval($item['gravity']);
1530                 } elseif ($item['parent-uri'] === $item['uri']) {
1531                         return GRAVITY_PARENT;
1532                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1533                         return GRAVITY_COMMENT;
1534                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1535                         return GRAVITY_ACTIVITY;
1536                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
1537                         return GRAVITY_ACTIVITY;
1538                 }
1539                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
1540                 return GRAVITY_UNKNOWN;   // Should not happen
1541         }
1542
1543         public static function insert($item, $notify = false, $dontcache = false)
1544         {
1545                 $structure = self::getItemFields();
1546
1547                 $orig_item = $item;
1548
1549                 $priority = PRIORITY_HIGH;
1550
1551                 // If it is a posting where users should get notifications, then define it as wall posting
1552                 if ($notify) {
1553                         $item['wall'] = 1;
1554                         $item['origin'] = 1;
1555                         $item['network'] = Protocol::DFRN;
1556                         $item['protocol'] = Conversation::PARCEL_DFRN;
1557
1558                         if (is_int($notify)) {
1559                                 $priority = $notify;
1560                         }
1561                 } else {
1562                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1563                 }
1564
1565                 $uid = intval($item['uid']);
1566
1567                 $item['guid'] = self::guid($item, $notify);
1568                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
1569
1570                 // Store URI data
1571                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1572
1573                 // Backward compatibility: parent-uri used to be the direct parent uri.
1574                 // If it is provided without a thr-parent, it probably is the old behavior.
1575                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
1576                 $item['parent-uri'] = $item['thr-parent'];
1577
1578                 // Store conversation data
1579                 $item = Conversation::insert($item);
1580
1581                 /*
1582                  * Do we already have this item?
1583                  * We have to check several networks since Friendica posts could be repeated
1584                  * via OStatus (maybe Diasporsa as well)
1585                  */
1586                 $duplicate = self::getDuplicateID($item);
1587                 if ($duplicate) {
1588                         return $duplicate;
1589                 }
1590
1591                 // Additional duplicate checks
1592                 /// @todo Check why the first duplication check returns the item number and the second a 0
1593                 if (self::isDuplicate($item)) {
1594                         return 0;
1595                 }
1596
1597                 $item['wall']          = intval($item['wall'] ?? 0);
1598                 $item['extid']         = trim($item['extid'] ?? '');
1599                 $item['author-name']   = trim($item['author-name'] ?? '');
1600                 $item['author-link']   = trim($item['author-link'] ?? '');
1601                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1602                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1603                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1604                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1605                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1606                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1607                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1608                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1609                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1610                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
1611                 $item['location']      = trim($item['location'] ?? '');
1612                 $item['coord']         = trim($item['coord'] ?? '');
1613                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1614                 $item['deleted']       = 0;
1615                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1616                 $item['verb']          = trim($item['verb'] ?? '');
1617                 $item['object-type']   = trim($item['object-type'] ?? '');
1618                 $item['object']        = trim($item['object'] ?? '');
1619                 $item['target-type']   = trim($item['target-type'] ?? '');
1620                 $item['target']        = trim($item['target'] ?? '');
1621                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
1622                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1623                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1624                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1625                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1626                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1627                 $item['body']          = trim($item['body'] ?? '');
1628                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
1629                 $item['app']           = trim($item['app'] ?? '');
1630                 $item['origin']        = intval($item['origin'] ?? 0);
1631                 $item['postopts']      = trim($item['postopts'] ?? '');
1632                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1633                 $item['event-id']      = intval($item['event-id'] ?? 0);
1634                 $item['inform']        = trim($item['inform'] ?? '');
1635                 $item['file']          = trim($item['file'] ?? '');
1636
1637                 // Items cannot be stored before they happen ...
1638                 if ($item['created'] > DateTimeFormat::utcNow()) {
1639                         $item['created'] = DateTimeFormat::utcNow();
1640                 }
1641
1642                 // We haven't invented time travel by now.
1643                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1644                         $item['edited'] = DateTimeFormat::utcNow();
1645                 }
1646
1647                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1648
1649                 $item['gravity'] = self::getGravity($item);
1650
1651                 $item['language'] = self::getLanguage($item);
1652
1653                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1654                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1655                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
1656
1657                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1658                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1659                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1660
1661                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1662                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1663                         $item['post-type'] = self::PT_FOLLOWER;
1664                 }
1665
1666                 // Ensure that there is an avatar cache
1667                 Contact::checkAvatarCache($item['author-id']);
1668                 Contact::checkAvatarCache($item['owner-id']);
1669
1670                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1671                 $item["contact-id"] = self::contactId($item);
1672
1673                 if (!self::isValid($item)) {
1674                         return 0;
1675                 }
1676
1677                 if ($item['gravity'] !== GRAVITY_PARENT) {
1678                         $toplevel_parent = self::getTopLevelParent($item);
1679                         if (empty($toplevel_parent)) {
1680                                 return 0;
1681                         }
1682
1683                         // If the thread originated from this node, we check the permission against the thread starter
1684                         $condition = ['uri' => $toplevel_parent['uri'], 'wall' => true];
1685                         $localTopLevelParent = self::selectFirst(['uid'], $condition);
1686                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
1687                                 return 0;
1688                         }
1689
1690                         $parent_id          = $toplevel_parent['id'];
1691                         $item['parent-uri'] = $toplevel_parent['uri'];
1692                         $item['deleted']    = $toplevel_parent['deleted'];
1693                         $item['allow_cid']  = $toplevel_parent['allow_cid'];
1694                         $item['allow_gid']  = $toplevel_parent['allow_gid'];
1695                         $item['deny_cid']   = $toplevel_parent['deny_cid'];
1696                         $item['deny_gid']   = $toplevel_parent['deny_gid'];
1697                         $parent_origin      = $toplevel_parent['origin'];
1698
1699                         // Don't federate received participation messages
1700                         if ($item['verb'] != Activity::FOLLOW) {
1701                                 $item['wall'] = $toplevel_parent['wall'];
1702                         } else {
1703                                 $item['wall'] = false;
1704                         }
1705
1706                         /*
1707                          * If the parent is private, force privacy for the entire conversation
1708                          * This differs from the above settings as it subtly allows comments from
1709                          * email correspondents to be private even if the overall thread is not.
1710                          */
1711                         if ($toplevel_parent['private']) {
1712                                 $item['private'] = $toplevel_parent['private'];
1713                         }
1714
1715                         /*
1716                          * Edge case. We host a public forum that was originally posted to privately.
1717                          * The original author commented, but as this is a comment, the permissions
1718                          * weren't fixed up so it will still show the comment as private unless we fix it here.
1719                          */
1720                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
1721                                 $item['private'] = self::PUBLIC;
1722                         }
1723
1724                         // If its a post that originated here then tag the thread as "mention"
1725                         if ($item['origin'] && $item['uid']) {
1726                                 DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1727                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'uid' => $item['uid']]);
1728                         }
1729
1730                         // Update the contact relations
1731                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1732
1733                         unset($item['parent_origin']);
1734                 } else {
1735                         $parent_id = 0;
1736                         $parent_origin = $item['origin'];
1737                 }
1738
1739                 // We don't store the causer link, only the id
1740                 unset($item['causer-link']);
1741
1742                 // We don't store these fields anymore in the item table
1743                 unset($item['author-link']);
1744                 unset($item['author-name']);
1745                 unset($item['author-avatar']);
1746                 unset($item['author-network']);
1747
1748                 unset($item['owner-link']);
1749                 unset($item['owner-name']);
1750                 unset($item['owner-avatar']);
1751
1752                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1753                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1754
1755                 // Is this item available in the global items (with uid=0)?
1756                 if ($item["uid"] == 0) {
1757                         $item["global"] = true;
1758
1759                         // Set the global flag on all items if this was a global item entry
1760                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1761                 } else {
1762                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1763                 }
1764
1765                 // ACL settings
1766                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
1767                         $item["private"] = self::PRIVATE;
1768                 }
1769
1770                 if ($notify) {
1771                         $item['edit'] = false;
1772                         $item['parent'] = $parent_id;
1773                         Hook::callAll('post_local', $item);
1774                         unset($item['edit']);
1775                 } else {
1776                         Hook::callAll('post_remote', $item);
1777                 }
1778
1779                 // Set after the insert because top-level posts are self-referencing
1780                 unset($item['parent']);
1781
1782                 if (!empty($item['cancel'])) {
1783                         Logger::log('post cancelled by addon.');
1784                         return 0;
1785                 }
1786
1787                 if (empty($item['vid']) && !empty($item['verb'])) {
1788                         $item['vid'] = Verb::getID($item['verb']);
1789                 }
1790
1791                 // Creates or assigns the permission set
1792                 $item['psid'] = PermissionSet::getIdFromACL(
1793                         $item['uid'],
1794                         $item['allow_cid'],
1795                         $item['allow_gid'],
1796                         $item['deny_cid'],
1797                         $item['deny_gid']
1798                 );
1799
1800                 unset($item['allow_cid']);
1801                 unset($item['allow_gid']);
1802                 unset($item['deny_cid']);
1803                 unset($item['deny_gid']);
1804
1805                 // This array field is used to trigger some automatic reactions
1806                 // It is mainly used in the "post_local" hook.
1807                 unset($item['api_source']);
1808
1809                 if ($item['verb'] == Activity::ANNOUNCE) {
1810                         self::setOwnerforResharedItem($item);
1811                 }
1812
1813                 // Remove all media attachments from the body and store them in the post-media table
1814                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1815                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1816
1817                 // Check for hashtags in the body and repair or add hashtag links
1818                 $item['body'] = self::setHashtags($item['body']);
1819
1820                 if (!empty($item['attach'])) {
1821                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1822                 }
1823
1824                 // Fill the cache field
1825                 self::putInCache($item);
1826
1827                 if (stristr($item['verb'], Activity::POKE)) {
1828                         $notify_type = Delivery::POKE;
1829                 } else {
1830                         $notify_type = Delivery::POST;
1831                 }
1832
1833                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1834                         $item['icid'] = self::insertContent($item);
1835                         if (empty($item['icid'])) {
1836                                 // This shouldn't happen
1837                                 Logger::warning('No content stored, quitting', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'causer-id' => ($item['causer-id'] ?? 0), 'post-type' => $item['post-type'], 'network' => $item['network']]);
1838                                 return 0;
1839                         }
1840                 }
1841
1842                 $body = $item['body'];
1843                 $verb = $item['verb'];
1844
1845                 // We just remove everything that is content
1846                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1847                         unset($item[$field]);
1848                 }
1849
1850                 unset($item['activity']);
1851
1852                 // Filling item related side tables
1853
1854                 // Diaspora signature
1855                 if (!empty($item['diaspora_signed_text'])) {
1856                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1857                 }
1858
1859                 unset($item['diaspora_signed_text']);
1860
1861                 // Attached file links
1862                 if (!empty($item['file'])) {
1863                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1864                 }
1865
1866                 unset($item['file']);
1867
1868                 // Delivery relevant data
1869                 $delivery_data = Post\DeliveryData::extractFields($item);
1870                 unset($item['postopts']);
1871                 unset($item['inform']);
1872
1873                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1874                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1875                 }
1876
1877                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1878                 if (!Tag::existsForPost($item['uri-id'])) {
1879                         Tag::storeFromBody($item['uri-id'], $body);
1880                 }
1881
1882                 // Remove all fields that aren't part of the item table
1883                 foreach ($item as $field => $value) {
1884                         if (!in_array($field, $structure['item'])) {
1885                                 unset($item[$field]);
1886                         }
1887                 }
1888
1889                 if (Post\User::insert($item['uri-id'], $item['uid'], $item)) {
1890                         $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'network' => $item['network']];
1891                         if (DBA::exists('item', $condition)) {
1892                                 Logger::notice('Item is already inserted - aborting', $condition);
1893                                 return 0;
1894                         }
1895
1896                         $result = DBA::insert('item', $item);
1897
1898                         // When the item was successfully stored we fetch the ID of the item.
1899                         $current_post = DBA::lastInsertId();
1900                 } else {
1901                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1902                         return 0;
1903                 }
1904
1905                 if (empty($current_post) || !DBA::isResult($result)) {
1906                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1907                         Logger::warning('Could not store item. it will be spooled', ['result' => $result, 'id' => $current_post]);
1908                         self::spool($orig_item);
1909                         return 0;
1910                 }
1911
1912                 Logger::notice('created item', ['id' => $current_post, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1913
1914                 if (!$parent_id || ($item['gravity'] === GRAVITY_PARENT)) {
1915                         $parent_id = $current_post;
1916                 }
1917
1918                 // Set parent id
1919                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1920
1921                 $item['id'] = $current_post;
1922                 $item['parent'] = $parent_id;
1923
1924                 // update the commented timestamp on the parent
1925                 if (DI::config()->get('system', 'like_no_comment')) {
1926                         // Update when it is a comment
1927                         $update_commented = in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1928                 } else {
1929                         // Update when it isn't a follow or tag verb
1930                         $update_commented = !in_array($verb, [Activity::FOLLOW, Activity::TAG]);
1931                 }
1932
1933                 if ($update_commented) {
1934                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1935                 } else {
1936                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1937                 }
1938
1939                 if ($item['gravity'] === GRAVITY_PARENT) {
1940                         self::addThread($current_post);
1941                 } else {
1942                         self::updateThread($parent_id);
1943                 }
1944
1945                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1946                 if (self::tagDeliver($item['uid'], $current_post)) {
1947                         // Get the user information for the logging
1948                         $user = User::getById($uid);
1949
1950                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1951                         return 0;
1952                 }
1953
1954                 if (!$dontcache) {
1955                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1956                         if (DBA::isResult($posted_item)) {
1957                                 if ($notify) {
1958                                         Hook::callAll('post_local_end', $posted_item);
1959                                 } else {
1960                                         Hook::callAll('post_remote_end', $posted_item);
1961                                 }
1962                         } else {
1963                                 Logger::log('new item not found in DB, id ' . $current_post);
1964                         }
1965                 }
1966
1967                 if ($item['gravity'] === GRAVITY_PARENT) {
1968                         self::addShadow($current_post);
1969                 } else {
1970                         self::addShadowPost($current_post);
1971                 }
1972
1973                 self::updateContact($item);
1974
1975                 UserItem::setNotification($current_post);
1976
1977                 check_user_notification($current_post);
1978
1979                 // Distribute items to users who subscribed to their tags
1980                 self::distributeByTags($item);
1981
1982                 // Automatically reshare the item if the "remote_self" option is selected
1983                 self::autoReshare($item);
1984
1985                 $transmit = $notify || ($item['visible'] && ($parent_origin || $item['origin']));
1986
1987                 if ($transmit) {
1988                         $transmit_item = Item::selectFirst(['verb', 'origin'], ['id' => $item['id']]);
1989                         // Don't relay participation messages
1990                         if (($transmit_item['verb'] == Activity::FOLLOW) &&
1991                                 (!$transmit_item['origin'] || ($item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1992                                 Logger::info('Participation messages will not be relayed', ['item' => $item['id'], 'uri' => $item['uri'], 'verb' => $transmit_item['verb']]);
1993                                 $transmit = false;
1994                         }
1995                 }
1996
1997                 if ($transmit) {
1998                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
1999                 }
2000
2001                 return $current_post;
2002         }
2003
2004         /**
2005          * Change the owner of a parent item if it had been shared by a forum
2006          *
2007          * (public) forum posts in the new format consist of the regular post by the author
2008          * followed by an announce message sent from the forum account.
2009          * Changing the owner helps in grouping forum posts.
2010          *
2011          * @param array $item
2012          * @return void
2013          */
2014         private static function setOwnerforResharedItem(array $item)
2015         {
2016                 $parent = self::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-type'],
2017                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2018                 if (!DBA::isResult($parent)) {
2019                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2020                         return;
2021                 }
2022
2023                 $author = Contact::selectFirst(['url', 'contact-type'], ['id' => $item['author-id']]);
2024                 if (!DBA::isResult($author)) {
2025                         Logger::error('Author not found', ['id' => $item['author-id']]);
2026                         return;
2027                 }
2028
2029                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
2030                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
2031                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid']]);
2032                         return;
2033                 }
2034
2035                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
2036                         if ($parent['post-type'] == self::PT_ANNOUNCEMENT) {
2037                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
2038                                 return;
2039                         }
2040
2041                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
2042                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
2043                                 return;
2044                         }
2045                         self::update(['post-type' => self::PT_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
2046                         Logger::info('Set announcement post-type', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2047                         return;
2048                 }
2049
2050                 self::update(['owner-id' => $item['author-id'], 'contact-id' => $cid], ['id' => $parent['id']]);
2051                 Logger::info('Change owner of the parent', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'owner-id' => $item['author-id'], 'contact-id' => $cid]);
2052         }
2053
2054         /**
2055          * Distribute the given item to users who subscribed to their tags
2056          *
2057          * @param array $item     Processed item
2058          */
2059         private static function distributeByTags(array $item)
2060         {
2061                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
2062                         return;
2063                 }
2064
2065                 $uids = Tag::getUIDListByURIId($item['uri-id']);
2066                 foreach ($uids as $uid) {
2067                         if (Contact::isSharing($item['author-id'], $uid)) {
2068                                 $fields = [];
2069                         } else {
2070                                 $fields = ['post-type' => self::PT_TAG];
2071                         }
2072
2073                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
2074                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
2075                 }
2076         }
2077
2078         /**
2079          * Insert a new item content entry
2080          *
2081          * @param array $item The item fields that are to be inserted
2082          * @throws \Exception
2083          */
2084         private static function insertContent(array $item)
2085         {
2086                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2087
2088                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2089                         if (isset($item[$field])) {
2090                                 $fields[$field] = $item[$field];
2091                         }
2092                 }
2093
2094                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2095                 if (DBA::isResult($item_content)) {
2096                         $icid = $item_content['id'];
2097                         Logger::info('Existing content found', ['icid' => $icid, 'uri' => $item['uri']]);
2098                         return $icid;
2099                 }
2100
2101                 DBA::replace('item-content', $fields);
2102
2103                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2104                 if (DBA::isResult($item_content)) {
2105                         $icid = $item_content['id'];
2106                         Logger::notice('Content inserted', ['icid' => $icid, 'uri' => $item['uri']]);
2107                         return $icid;
2108                 }
2109
2110                 // This shouldn't happen.
2111                 Logger::error("Content wasn't inserted", $item);
2112                 return null;
2113         }
2114
2115         /**
2116          * Update existing item content entries
2117          *
2118          * @param array $item      The item fields that are to be changed
2119          * @param array $condition The condition for finding the item content entries
2120          * @throws \Exception
2121          */
2122         private static function updateContent($item, $condition)
2123         {
2124                 // We have to select only the fields from the "item-content" table
2125                 $fields = [];
2126                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2127                         if (isset($item[$field])) {
2128                                 $fields[$field] = $item[$field];
2129                         }
2130                 }
2131
2132                 if (empty($fields)) {
2133                         return;
2134                 }
2135
2136                 DBA::update('item-content', $fields, $condition, true);
2137                 Logger::info('Updated content', ['condition' => $condition]);
2138         }
2139
2140         /**
2141          * Distributes public items to the receivers
2142          *
2143          * @param integer $itemid      Item ID that should be added
2144          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2145          * @throws \Exception
2146          */
2147         public static function distribute($itemid, $signed_text = '')
2148         {
2149                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2150                 $parent = self::selectFirst(['owner-id'], $condition);
2151                 if (!DBA::isResult($parent)) {
2152                         return;
2153                 }
2154
2155                 // Only distribute public items from native networks
2156                 $condition = ['id' => $itemid, 'uid' => 0,
2157                         'network' => array_merge(Protocol::FEDERATED ,['']),
2158                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2159                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2160                 if (!DBA::isResult($item)) {
2161                         return;
2162                 }
2163
2164                 $origin = $item['origin'];
2165
2166                 $users = [];
2167
2168                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2169                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2170                 if (!DBA::isResult($owner)) {
2171                         return;
2172                 }
2173
2174                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2175                 $contacts = DBA::select('contact', ['uid'], $condition);
2176                 while ($contact = DBA::fetch($contacts)) {
2177                         if ($contact['uid'] == 0) {
2178                                 continue;
2179                         }
2180
2181                         $users[$contact['uid']] = $contact['uid'];
2182                 }
2183                 DBA::close($contacts);
2184
2185                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2186                 $contacts = DBA::select('contact', ['uid'], $condition);
2187                 while ($contact = DBA::fetch($contacts)) {
2188                         if ($contact['uid'] == 0) {
2189                                 continue;
2190                         }
2191
2192                         $users[$contact['uid']] = $contact['uid'];
2193                 }
2194                 DBA::close($contacts);
2195
2196                 if (!empty($owner['alias'])) {
2197                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
2198                         $contacts = DBA::select('contact', ['uid'], $condition);
2199                         while ($contact = DBA::fetch($contacts)) {
2200                                 if ($contact['uid'] == 0) {
2201                                         continue;
2202                                 }
2203
2204                                 $users[$contact['uid']] = $contact['uid'];
2205                         }
2206                         DBA::close($contacts);
2207                 }
2208
2209                 $origin_uid = 0;
2210
2211                 if ($item['uri'] != $item['parent-uri']) {
2212                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2213                         while ($parent = self::fetch($parents)) {
2214                                 $users[$parent['uid']] = $parent['uid'];
2215                                 if ($parent['origin'] && !$origin) {
2216                                         $origin_uid = $parent['uid'];
2217                                 }
2218                         }
2219                 }
2220
2221                 foreach ($users as $uid) {
2222                         if ($origin_uid == $uid) {
2223                                 $item['diaspora_signed_text'] = $signed_text;
2224                         }
2225                         self::storeForUser($item, $uid);
2226                 }
2227         }
2228
2229         /**
2230          * Store a public item defined by their URI-ID for the given users
2231          *
2232          * @param integer $uri_id URI-ID of the given item
2233          * @param integer $uid    The user that will receive the item entry
2234          * @param array   $fields Additional fields to be stored
2235          * @return integer stored item id
2236          */
2237         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [])
2238         {
2239                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => 0]);
2240                 if (!DBA::isResult($item)) {
2241                         return 0;
2242                 }
2243
2244                 if (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED)) {
2245                         Logger::notice('Item is private or not from a federated network. It will not be stored for the user.', ['uri-id' => $uri_id, 'uid' => $uid, 'private' => $item['private'], 'network' => $item['network']]);
2246                         return 0;
2247                 }
2248
2249                 $item['post-type'] = self::PT_STORED;
2250
2251                 $item = array_merge($item, $fields);
2252
2253                 $stored = self::storeForUser($item, $uid);
2254                 Logger::info('Public item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
2255                 return $stored;
2256         }
2257
2258         /**
2259          * Store a public item array for the given users
2260          *
2261          * @param array   $item   The item entry that will be stored
2262          * @param integer $uid    The user that will receive the item entry
2263          * @return integer stored item id
2264          * @throws \Exception
2265          */
2266         private static function storeForUser(array $item, int $uid)
2267         {
2268                 if (self::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
2269                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
2270                         return 0;
2271                 }
2272
2273                 unset($item['id']);
2274                 unset($item['parent']);
2275                 unset($item['mention']);
2276                 unset($item['starred']);
2277                 unset($item['unseen']);
2278                 unset($item['psid']);
2279
2280                 $item['uid'] = $uid;
2281                 $item['origin'] = 0;
2282                 $item['wall'] = 0;
2283
2284                 if ($item['gravity'] == GRAVITY_PARENT) {
2285                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
2286                 } else {
2287                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
2288                 }
2289
2290                 if (!empty($contact['id'])) {
2291                         $item['contact-id'] = $contact['id'];
2292                 } else {
2293                         // Shouldn't happen at all
2294                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
2295                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2296                         if (!DBA::isResult($self)) {
2297                                 // Shouldn't happen even less
2298                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
2299                                 return 0;
2300                         }
2301                         $item['contact-id'] = $self['id'];
2302                 }
2303
2304                 /// @todo Handling of "event-id"
2305
2306                 $notify = false;
2307                 if ($item['gravity'] == GRAVITY_PARENT) {
2308                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2309                         if (DBA::isResult($contact)) {
2310                                 $notify = self::isRemoteSelf($contact, $item);
2311                         }
2312                 }
2313
2314                 $distributed = self::insert($item, $notify, true);
2315
2316                 if (!$distributed) {
2317                         Logger::info("Distributed public item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
2318                 } else {
2319                         Logger::info('Distributed public item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
2320                 }
2321                 return $distributed;
2322         }
2323
2324         /**
2325          * Add a shadow entry for a given item id that is a thread starter
2326          *
2327          * We store every public item entry additionally with the user id "0".
2328          * This is used for the community page and for the search.
2329          * It is planned that in the future we will store public item entries only once.
2330          *
2331          * @param integer $itemid Item ID that should be added
2332          * @throws \Exception
2333          */
2334         private static function addShadow($itemid)
2335         {
2336                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2337                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2338                 $item = self::selectFirst($fields, $condition);
2339
2340                 if (!DBA::isResult($item)) {
2341                         return;
2342                 }
2343
2344                 // is it already a copy?
2345                 if (($itemid == 0) || ($item['uid'] == 0)) {
2346                         return;
2347                 }
2348
2349                 // Is it a visible public post?
2350                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2351                         return;
2352                 }
2353
2354                 // is it an entry from a connector? Only add an entry for natively connected networks
2355                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2356                         return;
2357                 }
2358
2359                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2360                         return;
2361                 }
2362
2363                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2364
2365                 if (DBA::isResult($item)) {
2366                         // Preparing public shadow (removing user specific data)
2367                         $item['uid'] = 0;
2368                         unset($item['id']);
2369                         unset($item['parent']);
2370                         unset($item['wall']);
2371                         unset($item['mention']);
2372                         unset($item['origin']);
2373                         unset($item['starred']);
2374                         unset($item['postopts']);
2375                         unset($item['inform']);
2376                         unset($item['post-type']);
2377                         if ($item['uri'] == $item['parent-uri']) {
2378                                 $item['contact-id'] = $item['owner-id'];
2379                         } else {
2380                                 $item['contact-id'] = $item['author-id'];
2381                         }
2382
2383                         $public_shadow = self::insert($item, false, true);
2384
2385                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
2386                 }
2387         }
2388
2389         /**
2390          * Add a shadow entry for a given item id that is a comment
2391          *
2392          * This function does the same like the function above - but for comments
2393          *
2394          * @param integer $itemid Item ID that should be added
2395          * @throws \Exception
2396          */
2397         private static function addShadowPost($itemid)
2398         {
2399                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2400                 if (!DBA::isResult($item)) {
2401                         return;
2402                 }
2403
2404                 // Is it a toplevel post?
2405                 if ($item['gravity'] == GRAVITY_PARENT) {
2406                         self::addShadow($itemid);
2407                         return;
2408                 }
2409
2410                 // Is this a shadow entry?
2411                 if ($item['uid'] == 0) {
2412                         return;
2413                 }
2414
2415                 // Is there a shadow parent?
2416                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2417                         return;
2418                 }
2419
2420                 // Is there already a shadow entry?
2421                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2422                         return;
2423                 }
2424
2425                 // Save "origin" and "parent" state
2426                 $origin = $item['origin'];
2427                 $parent = $item['parent'];
2428
2429                 // Preparing public shadow (removing user specific data)
2430                 $item['uid'] = 0;
2431                 unset($item['id']);
2432                 unset($item['parent']);
2433                 unset($item['wall']);
2434                 unset($item['mention']);
2435                 unset($item['origin']);
2436                 unset($item['starred']);
2437                 unset($item['postopts']);
2438                 unset($item['inform']);
2439                 unset($item['post-type']);
2440                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2441
2442                 $public_shadow = self::insert($item, false, true);
2443
2444                 Logger::info('Stored public shadow', ['uri' => $item['uri'], 'id' => $public_shadow]);
2445
2446                 // If this was a comment to a Diaspora post we don't get our comment back.
2447                 // This means that we have to distribute the comment by ourselves.
2448                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2449                         self::distribute($public_shadow);
2450                 }
2451         }
2452
2453         /**
2454          * Adds a language specification in a "language" element of given $arr.
2455          * Expects "body" element to exist in $arr.
2456          *
2457          * @param array $item
2458          * @return string detected language
2459          * @throws \Text_LanguageDetect_Exception
2460          */
2461         private static function getLanguage(array $item)
2462         {
2463                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
2464                         return '';
2465                 }
2466
2467                 // Convert attachments to links
2468                 $naked_body = BBCode::removeAttachment($item['body']);
2469                 if (empty($naked_body)) {
2470                         return '';
2471                 }
2472
2473                 // Remove links and pictures
2474                 $naked_body = BBCode::removeLinks($naked_body);
2475
2476                 // Convert the title and the body to plain text
2477                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
2478
2479                 // Remove possibly remaining links
2480                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
2481
2482                 if (empty($naked_body)) {
2483                         return '';
2484                 }
2485
2486                 $ld = new Language(DI::l10n()->getAvailableLanguages());
2487                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
2488                 if (is_array($languages)) {
2489                         return json_encode($languages);
2490                 }
2491
2492                 return '';
2493         }
2494
2495         public static function getLanguageMessage(array $item)
2496         {
2497                 $iso639 = new \Matriphe\ISO639\ISO639;
2498
2499                 $used_languages = '';
2500                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2501                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
2502                 }
2503                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2504                 return $used_languages;
2505         }
2506
2507         /**
2508          * Creates an unique guid out of a given uri
2509          *
2510          * @param string $uri uri of an item entry
2511          * @param string $host hostname for the GUID prefix
2512          * @return string unique guid
2513          */
2514         public static function guidFromUri($uri, $host)
2515         {
2516                 // Our regular guid routine is using this kind of prefix as well
2517                 // We have to avoid that different routines could accidentally create the same value
2518                 $parsed = parse_url($uri);
2519
2520                 // We use a hash of the hostname as prefix for the guid
2521                 $guid_prefix = hash("crc32", $host);
2522
2523                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2524                 unset($parsed["scheme"]);
2525
2526                 // Glue it together to be able to make a hash from it
2527                 $host_id = implode("/", $parsed);
2528
2529                 // We could use any hash algorithm since it isn't a security issue
2530                 $host_hash = hash("ripemd128", $host_id);
2531
2532                 return $guid_prefix.$host_hash;
2533         }
2534
2535         /**
2536          * generate an unique URI
2537          *
2538          * @param integer $uid  User id
2539          * @param string  $guid An existing GUID (Otherwise it will be generated)
2540          *
2541          * @return string
2542          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2543          */
2544         public static function newURI($uid, $guid = "")
2545         {
2546                 if ($guid == "") {
2547                         $guid = System::createUUID();
2548                 }
2549
2550                 return DI::baseUrl()->get() . '/objects/' . $guid;
2551         }
2552
2553         /**
2554          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2555          *
2556          * This can be used to filter for inactive contacts.
2557          * Only do this for public postings to avoid privacy problems, since poco data is public.
2558          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2559          *
2560          * @param array $arr Contains the just posted item record
2561          * @throws \Exception
2562          */
2563         private static function updateContact($arr)
2564         {
2565                 // Unarchive the author
2566                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2567                 if (DBA::isResult($contact)) {
2568                         Contact::unmarkForArchival($contact);
2569                 }
2570
2571                 // Unarchive the contact if it's not our own contact
2572                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2573                 if (DBA::isResult($contact)) {
2574                         Contact::unmarkForArchival($contact);
2575                 }
2576
2577                 /// @todo On private posts we could obfuscate the date
2578                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2579
2580                 // Is it a forum? Then we don't care about the rules from above
2581                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2582                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2583                                 $update = true;
2584                         }
2585                 }
2586
2587                 if ($update) {
2588                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2589                         // So we have to ensure to only update the last item when it had been our own post,
2590                         // or it had been done by a "regular" contact.
2591                         if (!empty($arr['wall'])) {
2592                                 $condition = ['id' => $arr['contact-id']];
2593                         } else {
2594                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2595                         }
2596                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2597                 }
2598                 // Now do the same for the system wide contacts with uid=0
2599                 if ($arr['private'] != self::PRIVATE) {
2600                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2601                                 ['id' => $arr['owner-id']]);
2602
2603                         if ($arr['owner-id'] != $arr['author-id']) {
2604                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2605                                         ['id' => $arr['author-id']]);
2606                         }
2607                 }
2608         }
2609
2610         public static function setHashtags($body)
2611         {
2612                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code'], function ($body) {
2613                         $tags = BBCode::getTags($body);
2614
2615                         // No hashtags?
2616                         if (!count($tags)) {
2617                                 return $body;
2618                         }
2619
2620                         // This sorting is important when there are hashtags that are part of other hashtags
2621                         // Otherwise there could be problems with hashtags like #test and #test2
2622                         // Because of this we are sorting from the longest to the shortest tag.
2623                         usort($tags, function ($a, $b) {
2624                                 return strlen($b) <=> strlen($a);
2625                         });
2626
2627                         $URLSearchString = "^\[\]";
2628
2629                         // All hashtags should point to the home server if "local_tags" is activated
2630                         if (DI::config()->get('system', 'local_tags')) {
2631                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2632                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2633                         }
2634
2635                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2636                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2637                                 function ($match) {
2638                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2639                                 }, $body);
2640
2641                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2642                                 function ($match) {
2643                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2644                                 }, $body);
2645
2646                         $body = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2647                                 function ($match) {
2648                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2649                                 }, $body);
2650
2651                         // Repair recursive urls
2652                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2653                                 "&num;$2", $body);
2654
2655                         foreach ($tags as $tag) {
2656                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2657                                         continue;
2658                                 }
2659
2660                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2661                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2662
2663                                 $body = str_replace($tag, $newtag, $body);
2664                         }
2665
2666                         // Convert back the masked hashtags
2667                         $body = str_replace("&num;", "#", $body);
2668
2669                         return $body;
2670                 });
2671
2672                 return $body;
2673         }
2674
2675         /**
2676          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2677          *
2678          * @param int $uid
2679          * @param int $item_id
2680          * @return boolean true if item was deleted, else false
2681          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2682          * @throws \ImagickException
2683          */
2684         private static function tagDeliver($uid, $item_id)
2685         {
2686                 $mention = false;
2687
2688                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2689                 if (!DBA::isResult($user)) {
2690                         return false;
2691                 }
2692
2693                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2694                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2695
2696                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2697                 if (!DBA::isResult($item)) {
2698                         return false;
2699                 }
2700
2701                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2702
2703                 /*
2704                  * Diaspora uses their own hardwired link URL in @-tags
2705                  * instead of the one we supply with webfinger
2706                  */
2707                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2708
2709                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2710                 if ($cnt) {
2711                         foreach ($matches as $mtch) {
2712                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2713                                         $mention = true;
2714                                         Logger::log('mention found: ' . $mtch[2]);
2715                                 }
2716                         }
2717                 }
2718
2719                 if (!$mention) {
2720                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
2721                         foreach ($tags as $tag) {
2722                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
2723                                         $mention = true;
2724                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
2725                                 }
2726                         }
2727                 }
2728
2729                 if (!$mention) {
2730                         if (($community_page || $prvgroup) &&
2731                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
2732                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2733                                 DBA::delete('item', ['id' => $item_id]);
2734                                 return true;
2735                         }
2736                         return false;
2737                 }
2738
2739                 $arr = ['item' => $item, 'user' => $user];
2740
2741                 Hook::callAll('tagged', $arr);
2742
2743                 if (!$community_page && !$prvgroup) {
2744                         return false;
2745                 }
2746
2747                 /*
2748                  * tgroup delivery - setup a second delivery chain
2749                  * prevent delivery looping - only proceed
2750                  * if the message originated elsewhere and is a top-level post
2751                  */
2752                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2753                         return false;
2754                 }
2755
2756                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2757                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2758                 if (!DBA::isResult($self)) {
2759                         return false;
2760                 }
2761
2762                 $owner_id = Contact::getIdForURL($self['url']);
2763
2764                 // also reset all the privacy bits to the forum default permissions
2765
2766                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2767
2768                 $psid = PermissionSet::getIdFromACL(
2769                         $user['uid'],
2770                         $user['allow_cid'],
2771                         $user['allow_gid'],
2772                         $user['deny_cid'],
2773                         $user['deny_gid']
2774                 );
2775
2776                 $forum_mode = ($prvgroup ? 2 : 1);
2777
2778                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2779                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2780                 self::update($fields, ['id' => $item_id]);
2781
2782                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2783
2784                 Item::performActivity($item_id, 'announce', $uid);
2785
2786                 return false;
2787         }
2788
2789         /**
2790          * Automatically reshare the item if the "remote_self" option is selected
2791          *
2792          * @param array $item
2793          * @return void
2794          */
2795         private static function autoReshare(array $item)
2796         {
2797                 if ($item['gravity'] != GRAVITY_PARENT) {
2798                         return;
2799                 }
2800
2801                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2802                         return;
2803                 }
2804
2805                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2806                         return;
2807                 }
2808
2809                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2810
2811                 Item::performActivity($item['id'], 'announce', $item['uid']);
2812         }
2813
2814         public static function isRemoteSelf($contact, &$datarray)
2815         {
2816                 if (!$contact['remote_self']) {
2817                         return false;
2818                 }
2819
2820                 // Prevent the forwarding of posts that are forwarded
2821                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2822                         Logger::info('Already forwarded');
2823                         return false;
2824                 }
2825
2826                 // Prevent to forward already forwarded posts
2827                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2828                         Logger::info('Already forwarded (second test)');
2829                         return false;
2830                 }
2831
2832                 // Only forward posts
2833                 if ($datarray["verb"] != Activity::POST) {
2834                         Logger::info('No post');
2835                         return false;
2836                 }
2837
2838                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2839                         Logger::info('Not public');
2840                         return false;
2841                 }
2842
2843                 $datarray2 = $datarray;
2844                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2845                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2846                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2847                                         ['uid' => $contact['uid'], 'self' => true]);
2848                         if (DBA::isResult($self)) {
2849                                 $datarray['contact-id'] = $self["id"];
2850
2851                                 $datarray['owner-name'] = $self["name"];
2852                                 $datarray['owner-link'] = $self["url"];
2853                                 $datarray['owner-avatar'] = $self["thumb"];
2854
2855                                 $datarray['author-name']   = $datarray['owner-name'];
2856                                 $datarray['author-link']   = $datarray['owner-link'];
2857                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2858
2859                                 unset($datarray['edited']);
2860
2861                                 unset($datarray['network']);
2862                                 unset($datarray['owner-id']);
2863                                 unset($datarray['author-id']);
2864                         }
2865
2866                         if ($contact['network'] != Protocol::FEED) {
2867                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2868                                 $datarray["guid"] = System::createUUID();
2869                                 unset($datarray["plink"]);
2870                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2871                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2872                                 $datarray["extid"] = Protocol::DFRN;
2873                                 $urlpart = parse_url($datarray2['author-link']);
2874                                 $datarray["app"] = $urlpart["host"];
2875                                 if (!empty($old_uri_id)) {
2876                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2877                                 }
2878
2879                                 unset($datarray["parent-uri"]);
2880                                 unset($datarray["thr-parent"]);
2881                         } else {
2882                                 $datarray['private'] = self::PUBLIC;
2883                         }
2884                 }
2885
2886                 if ($contact['network'] != Protocol::FEED) {
2887                         // Store the original post
2888                         $result = self::insert($datarray2);
2889                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2890                 } else {
2891                         $datarray["app"] = "Feed";
2892                         $result = true;
2893                 }
2894
2895                 // Trigger automatic reactions for addons
2896                 $datarray['api_source'] = true;
2897
2898                 // We have to tell the hooks who we are - this really should be improved
2899                 $_SESSION["authenticated"] = true;
2900                 $_SESSION["uid"] = $contact['uid'];
2901
2902                 return $result;
2903         }
2904
2905         /**
2906          *
2907          * @param string $s
2908          * @param int    $uid
2909          * @param array  $item
2910          * @param int    $cid
2911          * @return string
2912          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2913          * @throws \ImagickException
2914          */
2915         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2916         {
2917                 if (DI::config()->get('system', 'disable_embedded')) {
2918                         return $s;
2919                 }
2920
2921                 Logger::info('check for photos');
2922                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2923
2924                 $orig_body = $s;
2925                 $new_body = '';
2926
2927                 $img_start = strpos($orig_body, '[img');
2928                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2929                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2930
2931                 while (($img_st_close !== false) && ($img_len !== false)) {
2932                         $img_st_close++; // make it point to AFTER the closing bracket
2933                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2934
2935                         Logger::info('found photo', ['image' => $image]);
2936
2937                         if (stristr($image, $site . '/photo/')) {
2938                                 // Only embed locally hosted photos
2939                                 $replace = false;
2940                                 $i = basename($image);
2941                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2942                                 $x = strpos($i, '-');
2943
2944                                 if ($x) {
2945                                         $res = substr($i, $x + 1);
2946                                         $i = substr($i, 0, $x);
2947                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2948                                         if (DBA::isResult($photo)) {
2949                                                 /*
2950                                                  * Check to see if we should replace this photo link with an embedded image
2951                                                  * 1. No need to do so if the photo is public
2952                                                  * 2. If there's a contact-id provided, see if they're in the access list
2953                                                  *    for the photo. If so, embed it.
2954                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2955                                                  *    permissions, regardless of order but first check to see if they're an exact
2956                                                  *    match to save some processing overhead.
2957                                                  */
2958                                                 if (self::hasPermissions($photo)) {
2959                                                         if ($cid) {
2960                                                                 $recips = self::enumeratePermissions($photo);
2961                                                                 if (in_array($cid, $recips)) {
2962                                                                         $replace = true;
2963                                                                 }
2964                                                         } elseif ($item) {
2965                                                                 if (self::samePermissions($uid, $item, $photo)) {
2966                                                                         $replace = true;
2967                                                                 }
2968                                                         }
2969                                                 }
2970                                                 if ($replace) {
2971                                                         $photo_img = Photo::getImageForPhoto($photo);
2972                                                         // If a custom width and height were specified, apply before embedding
2973                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2974                                                                 Logger::info('scaling photo');
2975
2976                                                                 $width = intval($match[1]);
2977                                                                 $height = intval($match[2]);
2978
2979                                                                 $photo_img->scaleDown(max($width, $height));
2980                                                         }
2981
2982                                                         $data = $photo_img->asString();
2983                                                         $type = $photo_img->getType();
2984
2985                                                         Logger::info('replacing photo');
2986                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2987                                                         Logger::debug('replaced', ['image' => $image]);
2988                                                 }
2989                                         }
2990                                 }
2991                         }
2992
2993                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2994                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2995                         if ($orig_body === false) {
2996                                 $orig_body = '';
2997                         }
2998
2999                         $img_start = strpos($orig_body, '[img');
3000                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
3001                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
3002                 }
3003
3004                 $new_body = $new_body . $orig_body;
3005
3006                 return $new_body;
3007         }
3008
3009         private static function hasPermissions($obj)
3010         {
3011                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
3012                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
3013         }
3014
3015         private static function samePermissions($uid, $obj1, $obj2)
3016         {
3017                 // first part is easy. Check that these are exactly the same.
3018                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
3019                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
3020                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
3021                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
3022                         return true;
3023                 }
3024
3025                 // This is harder. Parse all the permissions and compare the resulting set.
3026                 $recipients1 = self::enumeratePermissions($obj1);
3027                 $recipients2 = self::enumeratePermissions($obj2);
3028                 sort($recipients1);
3029                 sort($recipients2);
3030
3031                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
3032                 return ($recipients1 == $recipients2);
3033         }
3034
3035         /**
3036          * Returns an array of contact-ids that are allowed to see this object
3037          *
3038          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
3039          * @param bool  $check_dead Prunes unavailable contacts from the result
3040          * @return array
3041          * @throws \Exception
3042          */
3043         public static function enumeratePermissions(array $obj, bool $check_dead = false)
3044         {
3045                 $aclFormater = DI::aclFormatter();
3046
3047                 $allow_people = $aclFormater->expand($obj['allow_cid']);
3048                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
3049                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
3050                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
3051                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
3052                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
3053                 $recipients   = array_diff($recipients, $deny);
3054                 return $recipients;
3055         }
3056
3057         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
3058         {
3059                 if (!$uid || ($days < 1)) {
3060                         return;
3061                 }
3062
3063                 $condition = ["`uid` = ? AND NOT `deleted` 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 int $item_id
3147          * @param string $verb
3148          *            Activity verb. One of
3149          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3150          *            attendno, unattendno, attendmaybe, unattendmaybe,
3151          *            announce, unannouce
3152          * @return bool
3153          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3154          * @throws \ImagickException
3155          * @hook  'post_local_end'
3156          *            array $arr
3157          *            'post_id' => ID of posted item
3158          */
3159         public static function performActivity(int $item_id, string $verb, int $uid)
3160         {
3161                 if (empty($uid)) {
3162                         return false;
3163                 }
3164
3165                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
3166
3167                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
3168                 if (!DBA::isResult($item)) {
3169                         Logger::log('like: unknown item ' . $item_id);
3170                         return false;
3171                 }
3172
3173                 $item_uri = $item['uri'];
3174
3175                 if (!in_array($item['uid'], [0, $uid])) {
3176                         return false;
3177                 }
3178
3179                 if (!Item::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
3180                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
3181                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
3182                                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
3183                                 if (!DBA::isResult($item)) {
3184                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'item-uri' => $item_uri]);
3185                                         return false;
3186                                 }
3187                         }
3188                 }
3189
3190                 // Retrieves the local post owner
3191                 $owner = User::getOwnerDataById($uid);
3192                 if (empty($owner)) {
3193                         Logger::info('Empty owner for user', ['uid' => $uid]);
3194                         return false;
3195                 }
3196
3197                 // Retrieve the current logged in user's public contact
3198                 $author_id = Contact::getIdForURL($owner['url']);
3199                 if (empty($author_id)) {
3200                         Logger::info('Empty public contact');
3201                         return false;
3202                 }
3203
3204                 $activity = null;
3205                 switch ($verb) {
3206                         case 'like':
3207                         case 'unlike':
3208                                 $activity = Activity::LIKE;
3209                                 break;
3210                         case 'dislike':
3211                         case 'undislike':
3212                                 $activity = Activity::DISLIKE;
3213                                 break;
3214                         case 'attendyes':
3215                         case 'unattendyes':
3216                                 $activity = Activity::ATTEND;
3217                                 break;
3218                         case 'attendno':
3219                         case 'unattendno':
3220                                 $activity = Activity::ATTENDNO;
3221                                 break;
3222                         case 'attendmaybe':
3223                         case 'unattendmaybe':
3224                                 $activity = Activity::ATTENDMAYBE;
3225                                 break;
3226                         case 'follow':
3227                         case 'unfollow':
3228                                 $activity = Activity::FOLLOW;
3229                                 break;
3230                         case 'announce':
3231                         case 'unannounce':
3232                                 $activity = Activity::ANNOUNCE;
3233                                 break;
3234                         default:
3235                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
3236                                 return false;
3237                 }
3238
3239                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
3240
3241                 // Enable activity toggling instead of on/off
3242                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3243
3244                 // Look for an existing verb row
3245                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
3246                 if ($event_verb_flag) {
3247                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3248
3249                         // Translate to the index based activity index
3250                         $vids = [];
3251                         foreach ($verbs as $verb) {
3252                                 $vids[] = Verb::getID($verb);
3253                         }
3254                 } else {
3255                         $vids = Verb::getID($activity);
3256                 }
3257
3258                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3259                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3260                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3261
3262                 if (DBA::isResult($like_item)) {
3263                         /**
3264                          * Truth table for existing activities
3265                          *
3266                          * |          Inputs            ||      Outputs      |
3267                          * |----------------------------||-------------------|
3268                          * |  Mode  | Event | Same verb || Delete? | Return? |
3269                          * |--------|-------|-----------||---------|---------|
3270                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
3271                          * | create |  Yes  |    No     ||   Yes   |   No    |
3272                          * | create |  No   |    Yes    ||   No    |   Yes   |
3273                          * | create |  No   |    No     ||        N/A†       |
3274                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
3275                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
3276                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
3277                          * | delete |  No   |    No     ||        N/A†       |
3278                          * |--------|-------|-----------||---------|---------|
3279                          * |   A    |   B   |     C     || A xor C | !B or C |
3280                          *
3281                          * † Can't happen: It's impossible to find an existing non-event activity without
3282                          *                 the same verb because we are only looking for this single verb.
3283                          *
3284                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
3285                          */
3286                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
3287                                 self::markForDeletionById($like_item['id']);
3288                         }
3289
3290                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3291                                 return true;
3292                         }
3293                 }
3294
3295                 // No need to go further if we aren't creating anything
3296                 if ($mode == 'delete') {
3297                         return true;
3298                 }
3299
3300                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3301
3302                 $new_item = [
3303                         'guid'          => System::createUUID(),
3304                         'uri'           => self::newURI($item['uid']),
3305                         'uid'           => $item['uid'],
3306                         'contact-id'    => $owner['id'],
3307                         'wall'          => $item['wall'],
3308                         'origin'        => 1,
3309                         'network'       => Protocol::DFRN,
3310                         'gravity'       => GRAVITY_ACTIVITY,
3311                         'parent'        => $item['id'],
3312                         'thr-parent'    => $item['uri'],
3313                         'owner-id'      => $author_id,
3314                         'author-id'     => $author_id,
3315                         'body'          => $activity,
3316                         'verb'          => $activity,
3317                         'object-type'   => $objtype,
3318                         'allow_cid'     => $item['allow_cid'],
3319                         'allow_gid'     => $item['allow_gid'],
3320                         'deny_cid'      => $item['deny_cid'],
3321                         'deny_gid'      => $item['deny_gid'],
3322                         'visible'       => 1,
3323                         'unseen'        => 1,
3324                 ];
3325
3326                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3327                 if (!empty($signed)) {
3328                         $new_item['diaspora_signed_text'] = json_encode($signed);
3329                 }
3330
3331                 $new_item_id = self::insert($new_item);
3332
3333                 // If the parent item isn't visible then set it to visible
3334                 if (!$item['visible']) {
3335                         self::update(['visible' => true], ['id' => $item['id']]);
3336                 }
3337
3338                 $new_item['id'] = $new_item_id;
3339
3340                 Hook::callAll('post_local_end', $new_item);
3341
3342                 return true;
3343         }
3344
3345         private static function addThread($itemid, $onlyshadow = false)
3346         {
3347                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3348                         'moderated', 'visible', 'starred', 'contact-id', 'post-type', 'uri-id',
3349                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3350                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3351                 $item = self::selectFirst($fields, $condition);
3352
3353                 if (!DBA::isResult($item)) {
3354                         return;
3355                 }
3356
3357                 $item['iid'] = $itemid;
3358
3359                 if (!$onlyshadow) {
3360                         $result = DBA::replace('thread', $item);
3361
3362                         Logger::info('Add thread', ['item' => $itemid, 'result' => $result]);
3363                 }
3364         }
3365
3366         private static function updateThread($itemid, $setmention = false)
3367         {
3368                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3369                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id', 'uri-id',
3370                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3371
3372                 $item = self::selectFirst($fields, ['id' => $itemid, 'gravity' => GRAVITY_PARENT]);
3373                 if (!DBA::isResult($item)) {
3374                         return;
3375                 }
3376
3377                 if ($setmention) {
3378                         $item["mention"] = 1;
3379                 }
3380
3381                 $fields = [];
3382
3383                 foreach ($item as $field => $data) {
3384                         if (!in_array($field, ["guid"])) {
3385                                 $fields[$field] = $data;
3386                         }
3387                 }
3388
3389                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3390
3391                 Logger::info('Update thread', ['item' => $itemid, 'guid' => $item["guid"], 'result' => $result]);
3392         }
3393
3394         private static function deleteThread($itemid, $itemuri = "")
3395         {
3396                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3397                 if (!DBA::isResult($item)) {
3398                         Logger::info('No thread found', ['id' => $itemid]);
3399                         return;
3400                 }
3401
3402                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3403
3404                 Logger::info('Deleted thread', ['item' => $itemid, 'result' => $result]);
3405
3406                 if ($itemuri != "") {
3407                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3408                         if (!self::exists($condition)) {
3409                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3410                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3411                         }
3412                 }
3413         }
3414
3415         /**
3416          * Fetch the SQL condition for the given user id
3417          *
3418          * @param integer $owner_id User ID for which the permissions should be fetched
3419          * @return array condition
3420          */
3421         public static function getPermissionsConditionArrayByUserId(int $owner_id)
3422         {
3423                 $local_user = local_user();
3424                 $remote_user = Session::getRemoteContactID($owner_id);
3425
3426                 // default permissions - anonymous user
3427                 $condition = ["`private` != ?", self::PRIVATE];
3428
3429                 if ($local_user && ($local_user == $owner_id)) {
3430                         // Profile owner - everything is visible
3431                         $condition = [];
3432                 } elseif ($remote_user) {
3433                          // Authenticated visitor - fetch the matching permissionsets
3434                         $set = PermissionSet::get($owner_id, $remote_user);
3435                         if (!empty($set)) {
3436                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
3437                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
3438                                         Item::PRIVATE, Item::PRIVATE];
3439                                 $condition = array_merge($condition, $set);
3440                         }
3441                 }
3442
3443                 return $condition;
3444         }
3445
3446         public static function getPermissionsSQLByUserId($owner_id)
3447         {
3448                 $local_user = local_user();
3449                 $remote_user = Session::getRemoteContactID($owner_id);
3450
3451                 /*
3452                  * Construct permissions
3453                  *
3454                  * default permissions - anonymous user
3455                  */
3456                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3457
3458                 // Profile owner - everything is visible
3459                 if ($local_user && ($local_user == $owner_id)) {
3460                         $sql = '';
3461                 } elseif ($remote_user) {
3462                         /*
3463                          * Authenticated visitor. Unless pre-verified,
3464                          * check that the contact belongs to this $owner_id
3465                          * and load the groups the visitor belongs to.
3466                          * If pre-verified, the caller is expected to have already
3467                          * done this and passed the groups into this function.
3468                          */
3469                         $set = PermissionSet::get($owner_id, $remote_user);
3470
3471                         if (!empty($set)) {
3472                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3473                         } else {
3474                                 $sql_set = '';
3475                         }
3476
3477                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3478                 }
3479
3480                 return $sql;
3481         }
3482
3483         /**
3484          * get translated item type
3485          *
3486          * @param $item
3487          * @return string
3488          */
3489         public static function postType($item)
3490         {
3491                 if (!empty($item['event-id'])) {
3492                         return DI::l10n()->t('event');
3493                 } elseif (!empty($item['resource-id'])) {
3494                         return DI::l10n()->t('photo');
3495                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
3496                         return DI::l10n()->t('activity');
3497                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
3498                         return DI::l10n()->t('comment');
3499                 }
3500
3501                 return DI::l10n()->t('post');
3502         }
3503
3504         /**
3505          * Sets the "rendered-html" field of the provided item
3506          *
3507          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3508          *
3509          * @param array $item
3510          * @param bool  $update
3511          *
3512          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3513          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3514          */
3515         public static function putInCache(&$item, $update = false)
3516         {
3517                 $body = $item["body"];
3518
3519                 $rendered_hash = $item['rendered-hash'] ?? '';
3520                 $rendered_html = $item['rendered-html'] ?? '';
3521
3522                 if ($rendered_hash == ''
3523                         || $rendered_html == ""
3524                         || $rendered_hash != hash("md5", $item["body"])
3525                         || DI::config()->get("system", "ignore_cache")
3526                 ) {
3527                         self::addRedirToImageTags($item);
3528
3529                         $item["rendered-html"] = BBCode::convert($item["body"]);
3530                         $item["rendered-hash"] = hash("md5", $item["body"]);
3531
3532                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3533                         Hook::callAll('put_item_in_cache', $hook_data);
3534                         $item['rendered-html'] = $hook_data['rendered-html'];
3535                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3536                         unset($hook_data);
3537
3538                         // Force an update if the generated values differ from the existing ones
3539                         if ($rendered_hash != $item["rendered-hash"]) {
3540                                 $update = true;
3541                         }
3542
3543                         // Only compare the HTML when we forcefully ignore the cache
3544                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3545                                 $update = true;
3546                         }
3547
3548                         if ($update && !empty($item["id"])) {
3549                                 self::update(
3550                                         [
3551                                                 'rendered-html' => $item["rendered-html"],
3552                                                 'rendered-hash' => $item["rendered-hash"]
3553                                         ],
3554                                         ['id' => $item["id"]]
3555                                 );
3556                         }
3557                 }
3558
3559                 $item["body"] = $body;
3560         }
3561
3562         /**
3563          * Find any non-embedded images in private items and add redir links to them
3564          *
3565          * @param array &$item The field array of an item row
3566          */
3567         private static function addRedirToImageTags(array &$item)
3568         {
3569                 $app = DI::app();
3570
3571                 $matches = [];
3572                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3573                 if ($cnt) {
3574                         foreach ($matches as $mtch) {
3575                                 if (strpos($mtch[1], '/redir') !== false) {
3576                                         continue;
3577                                 }
3578
3579                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3580                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3581                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3582                                 }
3583                         }
3584                 }
3585         }
3586
3587         /**
3588          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3589          * If attach is true, also add icons for item attachments.
3590          *
3591          * @param array   $item
3592          * @param boolean $attach
3593          * @param boolean $is_preview
3594          * @return string item body html
3595          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3596          * @throws \ImagickException
3597          * @hook  prepare_body_init item array before any work
3598          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3599          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3600          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3601          */
3602         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3603         {
3604                 $a = DI::app();
3605                 Hook::callAll('prepare_body_init', $item);
3606
3607                 // In order to provide theme developers more possibilities, event items
3608                 // are treated differently.
3609                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3610                         $ev = Event::getItemHTML($item);
3611                         return $ev;
3612                 }
3613
3614                 $tags = Tag::populateFromItem($item);
3615
3616                 $item['tags'] = $tags['tags'];
3617                 $item['hashtags'] = $tags['hashtags'];
3618                 $item['mentions'] = $tags['mentions'];
3619
3620                 // Compile eventual content filter reasons
3621                 $filter_reasons = [];
3622                 if (!$is_preview && public_contact() != $item['author-id']) {
3623                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3624                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3625                         }
3626
3627                         $hook_data = [
3628                                 'item' => $item,
3629                                 'filter_reasons' => $filter_reasons
3630                         ];
3631                         Hook::callAll('prepare_body_content_filter', $hook_data);
3632                         $filter_reasons = $hook_data['filter_reasons'];
3633                         unset($hook_data);
3634                 }
3635
3636                 // Update the cached values if there is no "zrl=..." on the links.
3637                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3638
3639                 // Or update it if the current viewer is the intented viewer.
3640                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3641                         $update = true;
3642                 }
3643
3644                 self::putInCache($item, $update);
3645                 $s = $item["rendered-html"];
3646
3647                 $hook_data = [
3648                         'item' => $item,
3649                         'html' => $s,
3650                         'preview' => $is_preview,
3651                         'filter_reasons' => $filter_reasons
3652                 ];
3653                 Hook::callAll('prepare_body', $hook_data);
3654                 $s = $hook_data['html'];
3655                 unset($hook_data);
3656
3657                 if (!$attach) {
3658                         // Replace the blockquotes with quotes that are used in mails.
3659                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3660                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3661                         return $s;
3662                 }
3663
3664                 $as = '';
3665                 $vhead = false;
3666                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT, Post\Media::TORRENT, Post\Media::UNKNOWN]) as $attachment) {
3667                         $mime = $attachment['mimetype'];
3668
3669                         $the_url = Contact::magicLinkById($item['author-id'], $attachment['url']);
3670
3671                         if (strpos($mime, 'video') !== false) {
3672                                 if (!$vhead) {
3673                                         $vhead = true;
3674                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3675                                 }
3676
3677                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3678                                         '$video' => [
3679                                                 'id'     => $item['author-id'],
3680                                                 'title'  => DI::l10n()->t('View Video'),
3681                                                 'src'    => $the_url,
3682                                                 'mime'   => $mime,
3683                                         ],
3684                                 ]);
3685                         }
3686
3687                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3688                         if ($filetype) {
3689                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3690                                 $filesubtype = str_replace('.', '-', $filesubtype);
3691                         } else {
3692                                 $filetype = 'unkn';
3693                                 $filesubtype = 'unkn';
3694                         }
3695
3696                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3697                         $title .= ' ' . ($attachment['size'] ?? 0) . ' ' . DI::l10n()->t('bytes');
3698
3699                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3700                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3701                 }
3702
3703                 if ($as != '') {
3704                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3705                 }
3706
3707                 // Map.
3708                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3709                         $x = Map::byCoordinates(trim($item['coord']));
3710                         if ($x) {
3711                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3712                         }
3713                 }
3714
3715                 // Replace friendica image url size with theme preference.
3716                 if (!empty($a->theme_info['item_image_size'])) {
3717                         $ps = $a->theme_info['item_image_size'];
3718                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3719                 }
3720
3721                 $s = HTML::applyContentFilter($s, $filter_reasons);
3722
3723                 $hook_data = ['item' => $item, 'html' => $s];
3724                 Hook::callAll('prepare_body_final', $hook_data);
3725
3726                 return $hook_data['html'];
3727         }
3728
3729         /**
3730          * get private link for item
3731          *
3732          * @param array $item
3733          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3734          * @throws \Exception
3735          */
3736         public static function getPlink($item)
3737         {
3738                 if (local_user()) {
3739                         $ret = [
3740                                 'href' => "display/" . $item['guid'],
3741                                 'orig' => "display/" . $item['guid'],
3742                                 'title' => DI::l10n()->t('View on separate page'),
3743                                 'orig_title' => DI::l10n()->t('view on separate page'),
3744                         ];
3745
3746                         if (!empty($item['plink'])) {
3747                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3748                                 $ret["title"] = DI::l10n()->t('link to source');
3749                         }
3750                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3751                         $ret = [
3752                                 'href' => $item['plink'],
3753                                 'orig' => $item['plink'],
3754                                 'title' => DI::l10n()->t('link to source'),
3755                         ];
3756                 } else {
3757                         $ret = [];
3758                 }
3759
3760                 return $ret;
3761         }
3762
3763         /**
3764          * Is the given item array a post that is sent as starting post to a forum?
3765          *
3766          * @param array $item
3767          * @param array $owner
3768          *
3769          * @return boolean "true" when it is a forum post
3770          */
3771         public static function isForumPost(array $item, array $owner = [])
3772         {
3773                 if (empty($owner)) {
3774                         $owner = User::getOwnerDataById($item['uid']);
3775                         if (empty($owner)) {
3776                                 return false;
3777                         }
3778                 }
3779
3780                 if (($item['author-id'] == $item['owner-id']) ||
3781                         ($owner['id'] == $item['contact-id']) ||
3782                         ($item['uri'] != $item['parent-uri']) ||
3783                         $item['origin']) {
3784                         return false;
3785                 }
3786
3787                 return Contact::isForum($item['contact-id']);
3788         }
3789
3790         /**
3791          * Search item id for given URI or plink
3792          *
3793          * @param string $uri
3794          * @param integer $uid
3795          *
3796          * @return integer item id
3797          */
3798         public static function searchByLink($uri, $uid = 0)
3799         {
3800                 $ssl_uri = str_replace('http://', 'https://', $uri);
3801                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3802
3803                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3804                 if (DBA::isResult($item)) {
3805                         return $item['id'];
3806                 }
3807
3808                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3809                 if (!DBA::isResult($itemcontent)) {
3810                         return 0;
3811                 }
3812
3813                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3814                 if (!DBA::isResult($itemuri)) {
3815                         return 0;
3816                 }
3817
3818                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3819                 if (DBA::isResult($item)) {
3820                         return $item['id'];
3821                 }
3822
3823                 return 0;
3824         }
3825
3826         /**
3827          * Return the URI for a link to the post
3828          *
3829          * @param string $uri URI or link to post
3830          *
3831          * @return string URI
3832          */
3833         public static function getURIByLink(string $uri)
3834         {
3835                 $ssl_uri = str_replace('http://', 'https://', $uri);
3836                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3837
3838                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3839                 if (DBA::isResult($item)) {
3840                         return $item['uri'];
3841                 }
3842
3843                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3844                 if (!DBA::isResult($itemcontent)) {
3845                         return '';
3846                 }
3847
3848                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3849                 if (DBA::isResult($itemuri)) {
3850                         return $itemuri['uri'];
3851                 }
3852
3853                 return '';
3854         }
3855
3856         /**
3857          * Fetches item for given URI or plink
3858          *
3859          * @param string $uri
3860          * @param integer $uid
3861          *
3862          * @return integer item id
3863          */
3864         public static function fetchByLink(string $uri, int $uid = 0)
3865         {
3866                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3867                 $item_id = self::searchByLink($uri, $uid);
3868                 if (!empty($item_id)) {
3869                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3870                         return $item_id;
3871                 }
3872
3873                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3874                         $item_id = self::searchByLink($fetched_uri, $uid);
3875                 } else {
3876                         $item_id = Diaspora::fetchByURL($uri);
3877                 }
3878
3879                 if (!empty($item_id)) {
3880                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3881                         return $item_id;
3882                 }
3883
3884                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3885                 return 0;
3886         }
3887
3888         /**
3889          * Return share data from an item array (if the item is shared item)
3890          * We are providing the complete Item array, because at some time in the future
3891          * we hopefully will define these values not in the body anymore but in some item fields.
3892          * This function is meant to replace all similar functions in the system.
3893          *
3894          * @param array $item
3895          *
3896          * @return array with share information
3897          */
3898         public static function getShareArray($item)
3899         {
3900                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3901                         return [];
3902                 }
3903
3904                 $attribute_string = $matches[2];
3905                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3906                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3907                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3908                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3909                         }
3910                 }
3911                 return $attributes;
3912         }
3913
3914         /**
3915          * Fetch item information for shared items from the original items and adds it.
3916          *
3917          * @param array $item
3918          *
3919          * @return array item array with data from the original item
3920          */
3921         public static function addShareDataFromOriginal(array $item)
3922         {
3923                 $shared = self::getShareArray($item);
3924                 if (empty($shared)) {
3925                         return $item;
3926                 }
3927
3928                 // Real reshares always have got a GUID.
3929                 if (empty($shared['guid'])) {
3930                         return $item;
3931                 }
3932
3933                 $uid = $item['uid'] ?? 0;
3934
3935                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3936                 $shared_item = self::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3937                 if (!DBA::isResult($shared_item)) {
3938                         if (empty($shared['link'])) {
3939                                 return $item;
3940                         }
3941
3942                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3943                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3944                         if (empty($id)) {
3945                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3946                                 return $item;
3947                         }
3948
3949                         $shared_item = self::selectFirst(['title', 'body'], ['id' => $id]);
3950                         if (!DBA::isResult($shared_item)) {
3951                                 return $item;
3952                         }
3953                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3954                 } else {
3955                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3956                 }
3957
3958                 if (!empty($shared_item['title'])) {
3959                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3960                         unset($shared_item['title']);
3961                 } else {
3962                         $body = $shared_item['body'];
3963                 }
3964
3965                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3966                 unset($shared_item['body']);
3967
3968                 return array_merge($item, $shared_item);
3969         }
3970
3971         /**
3972          * Check a prospective item array against user-level permissions
3973          *
3974          * @param array $item Expected keys: uri, gravity, and
3975          *                    author-link if is author-id is set,
3976          *                    owner-link if is owner-id is set,
3977          *                    causer-link if is causer-id is set.
3978          * @param int   $user_id Local user ID
3979          * @return bool
3980          * @throws \Exception
3981          */
3982         protected static function isAllowedByUser(array $item, int $user_id)
3983         {
3984                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3985                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3986                         return false;
3987                 }
3988
3989                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3990                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3991                         return false;
3992                 }
3993
3994                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3995                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3996                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3997                         return false;
3998                 }
3999
4000                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
4001                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4002                         return false;
4003                 }
4004
4005                 return true;
4006         }
4007 }