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], $priority);
1187
1188                         // send the notification upstream/downstream
1189                         if ($priority) {
1190                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1191                         }
1192                 } elseif ($item['uid'] != 0) {
1193                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
1194
1195                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1196                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1197                         if (DBA::isResult($global_item)) {
1198                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1199                         }
1200                 }
1201
1202                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1203
1204                 return true;
1205         }
1206
1207
1208         private static function guid($item, $notify)
1209         {
1210                 if (!empty($item['guid'])) {
1211                         return Strings::escapeTags(trim($item['guid']));
1212                 }
1213
1214                 if ($notify) {
1215                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1216                         // We add the hash of our own host because our host is the original creator of the post.
1217                         $prefix_host = DI::baseUrl()->getHostname();
1218                 } else {
1219                         $prefix_host = '';
1220
1221                         // We are only storing the post so we create a GUID from the original hostname.
1222                         if (!empty($item['author-link'])) {
1223                                 $parsed = parse_url($item['author-link']);
1224                                 if (!empty($parsed['host'])) {
1225                                         $prefix_host = $parsed['host'];
1226                                 }
1227                         }
1228
1229                         if (empty($prefix_host) && !empty($item['plink'])) {
1230                                 $parsed = parse_url($item['plink']);
1231                                 if (!empty($parsed['host'])) {
1232                                         $prefix_host = $parsed['host'];
1233                                 }
1234                         }
1235
1236                         if (empty($prefix_host) && !empty($item['uri'])) {
1237                                 $parsed = parse_url($item['uri']);
1238                                 if (!empty($parsed['host'])) {
1239                                         $prefix_host = $parsed['host'];
1240                                 }
1241                         }
1242
1243                         // Is it in the format data@host.tld? - Used for mail contacts
1244                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1245                                 $mailparts = explode('@', $item['author-link']);
1246                                 $prefix_host = array_pop($mailparts);
1247                         }
1248                 }
1249
1250                 if (!empty($item['plink'])) {
1251                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1252                 } elseif (!empty($item['uri'])) {
1253                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1254                 } else {
1255                         $guid = System::createUUID(hash('crc32', $prefix_host));
1256                 }
1257
1258                 return $guid;
1259         }
1260
1261         private static function contactId($item)
1262         {
1263                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1264                         return $item['contact-id'];
1265                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1266                         return $item['contact-id'];
1267                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1268                         return $item['author-id'];
1269                 } elseif (!empty($item['contact-id'])) {
1270                         return $item['contact-id'];
1271                 } else {
1272                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1273                         if (!empty($contact_id)) {
1274                                 return $contact_id;
1275                         }
1276                 }
1277                 return $item['author-id'];
1278         }
1279
1280         // This function will finally cover most of the preparation functionality in mod/item.php
1281         public static function prepare(&$item)
1282         {
1283                 /*
1284                  * @TODO: Unused code triggering inspection errors
1285                  *
1286                 $data = BBCode::getAttachmentData($item['body']);
1287                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1288                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1289                         $posttype = Item::PT_PAGE;
1290                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1291                 }
1292                  */
1293         }
1294
1295         /**
1296          * Write an item array into a spool file to be inserted later.
1297          * This command is called whenever there are issues storing an item.
1298          *
1299          * @param array $item The item fields that are to be inserted
1300          * @throws \Exception
1301          */
1302         private static function spool($orig_item)
1303         {
1304                 // Now we store the data in the spool directory
1305                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1306                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1307
1308                 $spoolpath = get_spoolpath();
1309                 if ($spoolpath != "") {
1310                         $spool = $spoolpath . '/' . $file;
1311
1312                         file_put_contents($spool, json_encode($orig_item));
1313                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1314                 }
1315         }
1316
1317         /**
1318          * Check if the item array is a duplicate
1319          *
1320          * @param array $item
1321          * @return boolean is it a duplicate?
1322          */
1323         private static function isDuplicate(array $item)
1324         {
1325                 // Checking if there is already an item with the same guid
1326                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1327                 if (self::exists($condition)) {
1328                         Logger::notice('Found already existing item', [
1329                                 'guid' => $item['guid'],
1330                                 'uid' => $item['uid'],
1331                                 'network' => $item['network']
1332                         ]);
1333                         return true;
1334                 }
1335
1336                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1337                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1338                 if (self::exists($condition)) {
1339                         Logger::notice('duplicated item with the same uri found.', $item);
1340                         return true;
1341                 }
1342
1343                 // On Friendica and Diaspora the GUID is unique
1344                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1345                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1346                         if (self::exists($condition)) {
1347                                 Logger::notice('duplicated item with the same guid found.', $item);
1348                                 return true;
1349                         }
1350                 } elseif ($item['network'] == Protocol::OSTATUS) {
1351                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1352                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1353                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1354                         if (self::exists($condition)) {
1355                                 Logger::notice('duplicated item with the same body found.', $item);
1356                                 return true;
1357                         }
1358                 }
1359
1360                 /*
1361                  * Check for already added items.
1362                  * There is a timing issue here that sometimes creates double postings.
1363                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1364                  */
1365                 if (($item['uid'] == 0) && self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1366                         Logger::notice('Global item already stored.', ['uri' => $item['uri'], 'network' => $item['network']]);
1367                         return true;
1368                 }
1369
1370                 return false;
1371         }
1372
1373         /**
1374          * Check if the item array is valid
1375          *
1376          * @param array $item
1377          * @return boolean item is valid
1378          */
1379         public static function isValid(array $item)
1380         {
1381                 // When there is no content then we don't post it
1382                 if ($item['body'] . $item['title'] == '') {
1383                         Logger::notice('No body, no title.');
1384                         return false;
1385                 }
1386
1387                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
1388                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1389                         return false;
1390                 }
1391
1392                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1393                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1394                         return false;
1395                 }
1396
1397                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
1398                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1399                         return false;
1400                 }
1401
1402                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1403                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1404                         return false;
1405                 }
1406
1407                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
1408                         return false;
1409                 }
1410
1411                 if ($item['verb'] == Activity::FOLLOW) {
1412                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
1413                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1414                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
1415                                 return false;
1416                         }
1417
1418                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1419                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1420                         if (self::exists($condition)) {
1421                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1422                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
1423                                 return false;
1424                         }
1425                 }
1426
1427                 return true;
1428         }
1429
1430         /**
1431          * Check if the item array is too old
1432          *
1433          * @param array $item
1434          * @return boolean item is too old
1435          */
1436         public static function isTooOld(array $item)
1437         {
1438                 // check for create date and expire time
1439                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1440
1441                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
1442                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1443                         $expire_interval = $user['expire'];
1444                 }
1445
1446                 if (($expire_interval > 0) && !empty($item['created'])) {
1447                         $expire_date = time() - ($expire_interval * 86400);
1448                         $created_date = strtotime($item['created']);
1449                         if ($created_date < $expire_date) {
1450                                 Logger::notice('Item created before expiration interval.', [
1451                                         'created' => date('c', $created_date),
1452                                         'expired' => date('c', $expire_date),
1453                                         '$item' => $item
1454                                 ]);
1455                                 return true;
1456                         }
1457                 }
1458
1459                 return false;
1460         }
1461
1462         /**
1463          * Return the id of the given item array if it has been stored before
1464          *
1465          * @param array $item
1466          * @return integer item id
1467          */
1468         private static function getDuplicateID(array $item)
1469         {
1470                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1471                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1472                                 trim($item['uri']), $item['uid'],
1473                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1474                         $existing = self::selectFirst(['id', 'network'], $condition);
1475                         if (DBA::isResult($existing)) {
1476                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1477                                 if ($item['uid'] != 0) {
1478                                         Logger::notice('Item already existed for user', [
1479                                                 'uri' => $item['uri'],
1480                                                 'uid' => $item['uid'],
1481                                                 'network' => $item['network'],
1482                                                 'existing_id' => $existing["id"],
1483                                                 'existing_network' => $existing["network"]
1484                                         ]);
1485                                 }
1486
1487                                 return $existing["id"];
1488                         }
1489                 }
1490                 return 0;
1491         }
1492
1493         /**
1494          * Fetch top-level parent data for the given item array
1495          *
1496          * @param array $item
1497          * @return array item array with parent data
1498          * @throws \Exception
1499          */
1500         private static function getTopLevelParent(array $item)
1501         {
1502                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
1503                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1504                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1505                 $condition = ['uri' => $item['thr-parent'], 'uid' => $item['uid']];
1506                 $params = ['order' => ['id' => false]];
1507                 $parent = self::selectFirst($fields, $condition, $params);
1508
1509                 if (!DBA::isResult($parent)) {
1510                         Logger::notice('item parent was not found - ignoring item', ['thr-parent' => $item['thr-parent'], 'uid' => $item['uid']]);
1511                         return [];
1512                 }
1513
1514                 if ($parent['uri'] == $parent['parent-uri']) {
1515                         return $parent;
1516                 }
1517
1518                 $condition = ['uri' => $parent['parent-uri'],
1519                         'parent-uri' => $parent['parent-uri'],
1520                         'uid' => $parent['uid']];
1521                 $params = ['order' => ['id' => false]];
1522                 $toplevel_parent = self::selectFirst($fields, $condition, $params);
1523                 if (!DBA::isResult($toplevel_parent)) {
1524                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri' => $parent['parent-uri'], 'uid' => $parent['uid']]);
1525                         return [];
1526                 }
1527
1528                 return $toplevel_parent;
1529         }
1530
1531         /**
1532          * Get the gravity for the given item array
1533          *
1534          * @param array $item
1535          * @return integer gravity
1536          */
1537         private static function getGravity(array $item)
1538         {
1539                 $activity = DI::activity();
1540
1541                 if (isset($item['gravity'])) {
1542                         return intval($item['gravity']);
1543                 } elseif ($item['parent-uri'] === $item['uri']) {
1544                         return GRAVITY_PARENT;
1545                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1546                         return GRAVITY_COMMENT;
1547                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1548                         return GRAVITY_ACTIVITY;
1549                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
1550                         return GRAVITY_ACTIVITY;
1551                 }
1552                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
1553                 return GRAVITY_UNKNOWN;   // Should not happen
1554         }
1555
1556         public static function insert($item, $notify = false, $dontcache = false)
1557         {
1558                 $structure = self::getItemFields();
1559
1560                 $orig_item = $item;
1561
1562                 $priority = PRIORITY_HIGH;
1563
1564                 // If it is a posting where users should get notifications, then define it as wall posting
1565                 if ($notify) {
1566                         $item['wall'] = 1;
1567                         $item['origin'] = 1;
1568                         $item['network'] = Protocol::DFRN;
1569                         $item['protocol'] = Conversation::PARCEL_DIRECT;
1570
1571                         if (is_int($notify)) {
1572                                 $priority = $notify;
1573                         }
1574                 } else {
1575                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1576                 }
1577
1578                 $uid = intval($item['uid']);
1579
1580                 $item['guid'] = self::guid($item, $notify);
1581                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
1582
1583                 // Store URI data
1584                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1585
1586                 // Backward compatibility: parent-uri used to be the direct parent uri.
1587                 // If it is provided without a thr-parent, it probably is the old behavior.
1588                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
1589                 $item['parent-uri'] = $item['thr-parent'];
1590
1591                 // Store conversation data
1592                 $item = Conversation::insert($item);
1593
1594                 /*
1595                  * Do we already have this item?
1596                  * We have to check several networks since Friendica posts could be repeated
1597                  * via OStatus (maybe Diasporsa as well)
1598                  */
1599                 $duplicate = self::getDuplicateID($item);
1600                 if ($duplicate) {
1601                         return $duplicate;
1602                 }
1603
1604                 // Additional duplicate checks
1605                 /// @todo Check why the first duplication check returns the item number and the second a 0
1606                 if (self::isDuplicate($item)) {
1607                         return 0;
1608                 }
1609
1610                 $item['wall']          = intval($item['wall'] ?? 0);
1611                 $item['extid']         = trim($item['extid'] ?? '');
1612                 $item['author-name']   = trim($item['author-name'] ?? '');
1613                 $item['author-link']   = trim($item['author-link'] ?? '');
1614                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1615                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1616                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1617                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1618                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1619                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1620                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1621                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1622                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1623                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
1624                 $item['location']      = trim($item['location'] ?? '');
1625                 $item['coord']         = trim($item['coord'] ?? '');
1626                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1627                 $item['deleted']       = 0;
1628                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1629                 $item['verb']          = trim($item['verb'] ?? '');
1630                 $item['object-type']   = trim($item['object-type'] ?? '');
1631                 $item['object']        = trim($item['object'] ?? '');
1632                 $item['target-type']   = trim($item['target-type'] ?? '');
1633                 $item['target']        = trim($item['target'] ?? '');
1634                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
1635                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1636                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1637                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1638                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1639                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1640                 $item['body']          = trim($item['body'] ?? '');
1641                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
1642                 $item['app']           = trim($item['app'] ?? '');
1643                 $item['origin']        = intval($item['origin'] ?? 0);
1644                 $item['postopts']      = trim($item['postopts'] ?? '');
1645                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1646                 $item['event-id']      = intval($item['event-id'] ?? 0);
1647                 $item['inform']        = trim($item['inform'] ?? '');
1648                 $item['file']          = trim($item['file'] ?? '');
1649
1650                 // Items cannot be stored before they happen ...
1651                 if ($item['created'] > DateTimeFormat::utcNow()) {
1652                         $item['created'] = DateTimeFormat::utcNow();
1653                 }
1654
1655                 // We haven't invented time travel by now.
1656                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1657                         $item['edited'] = DateTimeFormat::utcNow();
1658                 }
1659
1660                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1661
1662                 $item['gravity'] = self::getGravity($item);
1663
1664                 $item['language'] = self::getLanguage($item);
1665
1666                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1667                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1668                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
1669
1670                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1671                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1672                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1673
1674                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1675                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1676                         $item['post-type'] = self::PT_FOLLOWER;
1677                 }
1678
1679                 // Ensure that there is an avatar cache
1680                 Contact::checkAvatarCache($item['author-id']);
1681                 Contact::checkAvatarCache($item['owner-id']);
1682
1683                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1684                 $item["contact-id"] = self::contactId($item);
1685
1686                 if (!self::isValid($item)) {
1687                         return 0;
1688                 }
1689
1690                 if ($item['gravity'] !== GRAVITY_PARENT) {
1691                         $toplevel_parent = self::getTopLevelParent($item);
1692                         if (empty($toplevel_parent)) {
1693                                 return 0;
1694                         }
1695
1696                         // If the thread originated from this node, we check the permission against the thread starter
1697                         $condition = ['uri' => $toplevel_parent['uri'], 'wall' => true];
1698                         $localTopLevelParent = self::selectFirst(['uid'], $condition);
1699                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
1700                                 return 0;
1701                         }
1702
1703                         $parent_id          = $toplevel_parent['id'];
1704                         $item['parent-uri'] = $toplevel_parent['uri'];
1705                         $item['deleted']    = $toplevel_parent['deleted'];
1706                         $item['allow_cid']  = $toplevel_parent['allow_cid'];
1707                         $item['allow_gid']  = $toplevel_parent['allow_gid'];
1708                         $item['deny_cid']   = $toplevel_parent['deny_cid'];
1709                         $item['deny_gid']   = $toplevel_parent['deny_gid'];
1710                         $parent_origin      = $toplevel_parent['origin'];
1711
1712                         // Don't federate received participation messages
1713                         if ($item['verb'] != Activity::FOLLOW) {
1714                                 $item['wall'] = $toplevel_parent['wall'];
1715                         } else {
1716                                 $item['wall'] = false;
1717                         }
1718
1719                         /*
1720                          * If the parent is private, force privacy for the entire conversation
1721                          * This differs from the above settings as it subtly allows comments from
1722                          * email correspondents to be private even if the overall thread is not.
1723                          */
1724                         if ($toplevel_parent['private']) {
1725                                 $item['private'] = $toplevel_parent['private'];
1726                         }
1727
1728                         /*
1729                          * Edge case. We host a public forum that was originally posted to privately.
1730                          * The original author commented, but as this is a comment, the permissions
1731                          * weren't fixed up so it will still show the comment as private unless we fix it here.
1732                          */
1733                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
1734                                 $item['private'] = self::PUBLIC;
1735                         }
1736
1737                         // If its a post that originated here then tag the thread as "mention"
1738                         if ($item['origin'] && $item['uid']) {
1739                                 DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1740                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'uid' => $item['uid']]);
1741                         }
1742
1743                         // Update the contact relations
1744                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1745
1746                         unset($item['parent_origin']);
1747                 } else {
1748                         $parent_id = 0;
1749                         $parent_origin = $item['origin'];
1750                 }
1751
1752                 // We don't store the causer link, only the id
1753                 unset($item['causer-link']);
1754
1755                 // We don't store these fields anymore in the item table
1756                 unset($item['author-link']);
1757                 unset($item['author-name']);
1758                 unset($item['author-avatar']);
1759                 unset($item['author-network']);
1760
1761                 unset($item['owner-link']);
1762                 unset($item['owner-name']);
1763                 unset($item['owner-avatar']);
1764
1765                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1766                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1767
1768                 // Is this item available in the global items (with uid=0)?
1769                 if ($item["uid"] == 0) {
1770                         $item["global"] = true;
1771
1772                         // Set the global flag on all items if this was a global item entry
1773                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1774                 } else {
1775                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1776                 }
1777
1778                 // ACL settings
1779                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
1780                         $item["private"] = self::PRIVATE;
1781                 }
1782
1783                 if ($notify) {
1784                         $item['edit'] = false;
1785                         $item['parent'] = $parent_id;
1786                         Hook::callAll('post_local', $item);
1787                         unset($item['edit']);
1788                 } else {
1789                         Hook::callAll('post_remote', $item);
1790                 }
1791
1792                 // Set after the insert because top-level posts are self-referencing
1793                 unset($item['parent']);
1794
1795                 if (!empty($item['cancel'])) {
1796                         Logger::log('post cancelled by addon.');
1797                         return 0;
1798                 }
1799
1800                 if (empty($item['vid']) && !empty($item['verb'])) {
1801                         $item['vid'] = Verb::getID($item['verb']);
1802                 }
1803
1804                 // Creates or assigns the permission set
1805                 $item['psid'] = PermissionSet::getIdFromACL(
1806                         $item['uid'],
1807                         $item['allow_cid'],
1808                         $item['allow_gid'],
1809                         $item['deny_cid'],
1810                         $item['deny_gid']
1811                 );
1812
1813                 unset($item['allow_cid']);
1814                 unset($item['allow_gid']);
1815                 unset($item['deny_cid']);
1816                 unset($item['deny_gid']);
1817
1818                 // This array field is used to trigger some automatic reactions
1819                 // It is mainly used in the "post_local" hook.
1820                 unset($item['api_source']);
1821
1822                 if ($item['verb'] == Activity::ANNOUNCE) {
1823                         self::setOwnerforResharedItem($item);
1824                 }
1825
1826                 // Remove all media attachments from the body and store them in the post-media table
1827                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1828                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1829
1830                 // Check for hashtags in the body and repair or add hashtag links
1831                 $item['body'] = self::setHashtags($item['body']);
1832
1833                 if (!empty($item['attach'])) {
1834                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1835                 }
1836
1837                 // Fill the cache field
1838                 self::putInCache($item);
1839
1840                 if (stristr($item['verb'], Activity::POKE)) {
1841                         $notify_type = Delivery::POKE;
1842                 } else {
1843                         $notify_type = Delivery::POST;
1844                 }
1845
1846                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1847                         $item['icid'] = self::insertContent($item);
1848                         if (empty($item['icid'])) {
1849                                 // This shouldn't happen
1850                                 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']]);
1851                                 return 0;
1852                         }
1853                 }
1854
1855                 $body = $item['body'];
1856                 $verb = $item['verb'];
1857
1858                 // We just remove everything that is content
1859                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1860                         unset($item[$field]);
1861                 }
1862
1863                 unset($item['activity']);
1864
1865                 // Filling item related side tables
1866
1867                 // Diaspora signature
1868                 if (!empty($item['diaspora_signed_text'])) {
1869                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1870                 }
1871
1872                 unset($item['diaspora_signed_text']);
1873
1874                 // Attached file links
1875                 if (!empty($item['file'])) {
1876                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1877                 }
1878
1879                 unset($item['file']);
1880
1881                 // Delivery relevant data
1882                 $delivery_data = Post\DeliveryData::extractFields($item);
1883                 unset($item['postopts']);
1884                 unset($item['inform']);
1885
1886                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1887                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1888                 }
1889
1890                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1891                 if (!Tag::existsForPost($item['uri-id'])) {
1892                         Tag::storeFromBody($item['uri-id'], $body);
1893                 }
1894
1895                 if (Post\User::insert($item['uri-id'], $item['uid'], $item)) {
1896                         // Remove all fields that aren't part of the item table
1897                         foreach ($item as $field => $value) {
1898                                 if (!in_array($field, $structure['item'])) {
1899                                         unset($item[$field]);
1900                                 }
1901                         }
1902
1903                         $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'network' => $item['network']];
1904                         if (DBA::exists('item', $condition)) {
1905                                 Logger::notice('Item is already inserted - aborting', $condition);
1906                                 return 0;
1907                         }
1908
1909                         $result = DBA::insert('item', $item);
1910
1911                         // When the item was successfully stored we fetch the ID of the item.
1912                         $current_post = DBA::lastInsertId();
1913                 } else {
1914                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1915                         return 0;
1916                 }
1917
1918                 if (empty($current_post) || !DBA::isResult($result)) {
1919                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1920                         Logger::warning('Could not store item. it will be spooled', ['result' => $result, 'id' => $current_post]);
1921                         self::spool($orig_item);
1922                         return 0;
1923                 }
1924
1925                 Logger::notice('created item', ['id' => $current_post, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1926
1927                 if (!$parent_id || ($item['gravity'] === GRAVITY_PARENT)) {
1928                         $parent_id = $current_post;
1929                 }
1930
1931                 // Set parent id
1932                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1933
1934                 $item['id'] = $current_post;
1935                 $item['parent'] = $parent_id;
1936
1937                 // update the commented timestamp on the parent
1938                 if (DI::config()->get('system', 'like_no_comment')) {
1939                         // Update when it is a comment
1940                         $update_commented = in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1941                 } else {
1942                         // Update when it isn't a follow or tag verb
1943                         $update_commented = !in_array($verb, [Activity::FOLLOW, Activity::TAG]);
1944                 }
1945
1946                 if ($update_commented) {
1947                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1948                 } else {
1949                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1950                 }
1951
1952                 if ($item['gravity'] === GRAVITY_PARENT) {
1953                         self::addThread($current_post);
1954                 } else {
1955                         self::updateThread($parent_id);
1956                 }
1957
1958                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1959                 if (self::tagDeliver($item['uid'], $current_post)) {
1960                         // Get the user information for the logging
1961                         $user = User::getById($uid);
1962
1963                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1964                         return 0;
1965                 }
1966
1967                 if (!$dontcache) {
1968                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1969                         if (DBA::isResult($posted_item)) {
1970                                 if ($notify) {
1971                                         Hook::callAll('post_local_end', $posted_item);
1972                                 } else {
1973                                         Hook::callAll('post_remote_end', $posted_item);
1974                                 }
1975                         } else {
1976                                 Logger::log('new item not found in DB, id ' . $current_post);
1977                         }
1978                 }
1979
1980                 if ($item['gravity'] === GRAVITY_PARENT) {
1981                         self::addShadow($current_post);
1982                 } else {
1983                         self::addShadowPost($current_post);
1984                 }
1985
1986                 self::updateContact($item);
1987
1988                 UserItem::setNotification($current_post);
1989
1990                 check_user_notification($current_post);
1991
1992                 // Distribute items to users who subscribed to their tags
1993                 self::distributeByTags($item);
1994
1995                 // Automatically reshare the item if the "remote_self" option is selected
1996                 self::autoReshare($item);
1997
1998                 $transmit = $notify || ($item['visible'] && ($parent_origin || $item['origin']));
1999
2000                 if ($transmit) {
2001                         $transmit_item = Item::selectFirst(['verb', 'origin'], ['id' => $item['id']]);
2002                         // Don't relay participation messages
2003                         if (($transmit_item['verb'] == Activity::FOLLOW) &&
2004                                 (!$transmit_item['origin'] || ($item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
2005                                 Logger::info('Participation messages will not be relayed', ['item' => $item['id'], 'uri' => $item['uri'], 'verb' => $transmit_item['verb']]);
2006                                 $transmit = false;
2007                         }
2008                 }
2009
2010                 if ($transmit) {
2011                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2012                 }
2013
2014                 return $current_post;
2015         }
2016
2017         /**
2018          * Change the owner of a parent item if it had been shared by a forum
2019          *
2020          * (public) forum posts in the new format consist of the regular post by the author
2021          * followed by an announce message sent from the forum account.
2022          * Changing the owner helps in grouping forum posts.
2023          *
2024          * @param array $item
2025          * @return void
2026          */
2027         private static function setOwnerforResharedItem(array $item)
2028         {
2029                 $parent = self::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-type'],
2030                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2031                 if (!DBA::isResult($parent)) {
2032                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2033                         return;
2034                 }
2035
2036                 $author = Contact::selectFirst(['url', 'contact-type'], ['id' => $item['author-id']]);
2037                 if (!DBA::isResult($author)) {
2038                         Logger::error('Author not found', ['id' => $item['author-id']]);
2039                         return;
2040                 }
2041
2042                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
2043                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
2044                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid']]);
2045                         return;
2046                 }
2047
2048                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
2049                         if ($parent['post-type'] == self::PT_ANNOUNCEMENT) {
2050                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
2051                                 return;
2052                         }
2053
2054                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
2055                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
2056                                 return;
2057                         }
2058                         self::update(['post-type' => self::PT_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
2059                         Logger::info('Set announcement post-type', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2060                         return;
2061                 }
2062
2063                 self::update(['owner-id' => $item['author-id'], 'contact-id' => $cid], ['id' => $parent['id']]);
2064                 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]);
2065         }
2066
2067         /**
2068          * Distribute the given item to users who subscribed to their tags
2069          *
2070          * @param array $item     Processed item
2071          */
2072         private static function distributeByTags(array $item)
2073         {
2074                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
2075                         return;
2076                 }
2077
2078                 $uids = Tag::getUIDListByURIId($item['uri-id']);
2079                 foreach ($uids as $uid) {
2080                         if (Contact::isSharing($item['author-id'], $uid)) {
2081                                 $fields = [];
2082                         } else {
2083                                 $fields = ['post-type' => self::PT_TAG];
2084                         }
2085
2086                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
2087                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
2088                 }
2089         }
2090
2091         /**
2092          * Insert a new item content entry
2093          *
2094          * @param array $item The item fields that are to be inserted
2095          * @throws \Exception
2096          */
2097         private static function insertContent(array $item)
2098         {
2099                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2100
2101                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2102                         if (isset($item[$field])) {
2103                                 $fields[$field] = $item[$field];
2104                         }
2105                 }
2106
2107                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2108                 if (DBA::isResult($item_content)) {
2109                         $icid = $item_content['id'];
2110                         Logger::info('Existing content found', ['icid' => $icid, 'uri' => $item['uri']]);
2111                         return $icid;
2112                 }
2113
2114                 DBA::replace('item-content', $fields);
2115
2116                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2117                 if (DBA::isResult($item_content)) {
2118                         $icid = $item_content['id'];
2119                         Logger::notice('Content inserted', ['icid' => $icid, 'uri' => $item['uri']]);
2120                         return $icid;
2121                 }
2122
2123                 // This shouldn't happen.
2124                 Logger::error("Content wasn't inserted", $item);
2125                 return null;
2126         }
2127
2128         /**
2129          * Update existing item content entries
2130          *
2131          * @param array $item      The item fields that are to be changed
2132          * @param array $condition The condition for finding the item content entries
2133          * @throws \Exception
2134          */
2135         private static function updateContent($item, $condition)
2136         {
2137                 // We have to select only the fields from the "item-content" table
2138                 $fields = [];
2139                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2140                         if (isset($item[$field])) {
2141                                 $fields[$field] = $item[$field];
2142                         }
2143                 }
2144
2145                 if (empty($fields)) {
2146                         return;
2147                 }
2148
2149                 DBA::update('item-content', $fields, $condition, true);
2150                 Logger::info('Updated content', ['condition' => $condition]);
2151         }
2152
2153         /**
2154          * Distributes public items to the receivers
2155          *
2156          * @param integer $itemid      Item ID that should be added
2157          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2158          * @throws \Exception
2159          */
2160         public static function distribute($itemid, $signed_text = '')
2161         {
2162                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2163                 $parent = self::selectFirst(['owner-id'], $condition);
2164                 if (!DBA::isResult($parent)) {
2165                         return;
2166                 }
2167
2168                 // Only distribute public items from native networks
2169                 $condition = ['id' => $itemid, 'uid' => 0,
2170                         'network' => array_merge(Protocol::FEDERATED ,['']),
2171                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2172                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2173                 if (!DBA::isResult($item)) {
2174                         return;
2175                 }
2176
2177                 $origin = $item['origin'];
2178
2179                 $users = [];
2180
2181                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2182                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2183                 if (!DBA::isResult($owner)) {
2184                         return;
2185                 }
2186
2187                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2188                 $contacts = DBA::select('contact', ['uid'], $condition);
2189                 while ($contact = DBA::fetch($contacts)) {
2190                         if ($contact['uid'] == 0) {
2191                                 continue;
2192                         }
2193
2194                         $users[$contact['uid']] = $contact['uid'];
2195                 }
2196                 DBA::close($contacts);
2197
2198                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2199                 $contacts = DBA::select('contact', ['uid'], $condition);
2200                 while ($contact = DBA::fetch($contacts)) {
2201                         if ($contact['uid'] == 0) {
2202                                 continue;
2203                         }
2204
2205                         $users[$contact['uid']] = $contact['uid'];
2206                 }
2207                 DBA::close($contacts);
2208
2209                 if (!empty($owner['alias'])) {
2210                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
2211                         $contacts = DBA::select('contact', ['uid'], $condition);
2212                         while ($contact = DBA::fetch($contacts)) {
2213                                 if ($contact['uid'] == 0) {
2214                                         continue;
2215                                 }
2216
2217                                 $users[$contact['uid']] = $contact['uid'];
2218                         }
2219                         DBA::close($contacts);
2220                 }
2221
2222                 $origin_uid = 0;
2223
2224                 if ($item['uri'] != $item['parent-uri']) {
2225                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2226                         while ($parent = self::fetch($parents)) {
2227                                 $users[$parent['uid']] = $parent['uid'];
2228                                 if ($parent['origin'] && !$origin) {
2229                                         $origin_uid = $parent['uid'];
2230                                 }
2231                         }
2232                 }
2233
2234                 foreach ($users as $uid) {
2235                         if ($origin_uid == $uid) {
2236                                 $item['diaspora_signed_text'] = $signed_text;
2237                         }
2238                         self::storeForUser($item, $uid);
2239                 }
2240         }
2241
2242         /**
2243          * Store a public item defined by their URI-ID for the given users
2244          *
2245          * @param integer $uri_id URI-ID of the given item
2246          * @param integer $uid    The user that will receive the item entry
2247          * @param array   $fields Additional fields to be stored
2248          * @return integer stored item id
2249          */
2250         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [])
2251         {
2252                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => 0]);
2253                 if (!DBA::isResult($item)) {
2254                         return 0;
2255                 }
2256
2257                 if (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED)) {
2258                         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']]);
2259                         return 0;
2260                 }
2261
2262                 $item['post-type'] = self::PT_STORED;
2263
2264                 $item = array_merge($item, $fields);
2265
2266                 $stored = self::storeForUser($item, $uid);
2267                 Logger::info('Public item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
2268                 return $stored;
2269         }
2270
2271         /**
2272          * Store a public item array for the given users
2273          *
2274          * @param array   $item   The item entry that will be stored
2275          * @param integer $uid    The user that will receive the item entry
2276          * @return integer stored item id
2277          * @throws \Exception
2278          */
2279         private static function storeForUser(array $item, int $uid)
2280         {
2281                 if (self::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
2282                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
2283                         return 0;
2284                 }
2285
2286                 unset($item['id']);
2287                 unset($item['parent']);
2288                 unset($item['mention']);
2289                 unset($item['starred']);
2290                 unset($item['unseen']);
2291                 unset($item['psid']);
2292
2293                 $item['uid'] = $uid;
2294                 $item['origin'] = 0;
2295                 $item['wall'] = 0;
2296
2297                 if ($item['gravity'] == GRAVITY_PARENT) {
2298                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
2299                 } else {
2300                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
2301                 }
2302
2303                 if (!empty($contact['id'])) {
2304                         $item['contact-id'] = $contact['id'];
2305                 } else {
2306                         // Shouldn't happen at all
2307                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
2308                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2309                         if (!DBA::isResult($self)) {
2310                                 // Shouldn't happen even less
2311                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
2312                                 return 0;
2313                         }
2314                         $item['contact-id'] = $self['id'];
2315                 }
2316
2317                 /// @todo Handling of "event-id"
2318
2319                 $notify = false;
2320                 if ($item['gravity'] == GRAVITY_PARENT) {
2321                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2322                         if (DBA::isResult($contact)) {
2323                                 $notify = self::isRemoteSelf($contact, $item);
2324                         }
2325                 }
2326
2327                 $distributed = self::insert($item, $notify, true);
2328
2329                 if (!$distributed) {
2330                         Logger::info("Distributed public item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
2331                 } else {
2332                         Logger::info('Distributed public item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
2333                 }
2334                 return $distributed;
2335         }
2336
2337         /**
2338          * Add a shadow entry for a given item id that is a thread starter
2339          *
2340          * We store every public item entry additionally with the user id "0".
2341          * This is used for the community page and for the search.
2342          * It is planned that in the future we will store public item entries only once.
2343          *
2344          * @param integer $itemid Item ID that should be added
2345          * @throws \Exception
2346          */
2347         private static function addShadow($itemid)
2348         {
2349                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2350                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2351                 $item = self::selectFirst($fields, $condition);
2352
2353                 if (!DBA::isResult($item)) {
2354                         return;
2355                 }
2356
2357                 // is it already a copy?
2358                 if (($itemid == 0) || ($item['uid'] == 0)) {
2359                         return;
2360                 }
2361
2362                 // Is it a visible public post?
2363                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2364                         return;
2365                 }
2366
2367                 // is it an entry from a connector? Only add an entry for natively connected networks
2368                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2369                         return;
2370                 }
2371
2372                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2373                         return;
2374                 }
2375
2376                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2377
2378                 if (DBA::isResult($item)) {
2379                         // Preparing public shadow (removing user specific data)
2380                         $item['uid'] = 0;
2381                         unset($item['id']);
2382                         unset($item['parent']);
2383                         unset($item['wall']);
2384                         unset($item['mention']);
2385                         unset($item['origin']);
2386                         unset($item['starred']);
2387                         unset($item['postopts']);
2388                         unset($item['inform']);
2389                         unset($item['post-type']);
2390                         if ($item['uri'] == $item['parent-uri']) {
2391                                 $item['contact-id'] = $item['owner-id'];
2392                         } else {
2393                                 $item['contact-id'] = $item['author-id'];
2394                         }
2395
2396                         $public_shadow = self::insert($item, false, true);
2397
2398                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
2399                 }
2400         }
2401
2402         /**
2403          * Add a shadow entry for a given item id that is a comment
2404          *
2405          * This function does the same like the function above - but for comments
2406          *
2407          * @param integer $itemid Item ID that should be added
2408          * @throws \Exception
2409          */
2410         private static function addShadowPost($itemid)
2411         {
2412                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2413                 if (!DBA::isResult($item)) {
2414                         return;
2415                 }
2416
2417                 // Is it a toplevel post?
2418                 if ($item['gravity'] == GRAVITY_PARENT) {
2419                         self::addShadow($itemid);
2420                         return;
2421                 }
2422
2423                 // Is this a shadow entry?
2424                 if ($item['uid'] == 0) {
2425                         return;
2426                 }
2427
2428                 // Is there a shadow parent?
2429                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2430                         return;
2431                 }
2432
2433                 // Is there already a shadow entry?
2434                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2435                         return;
2436                 }
2437
2438                 // Save "origin" and "parent" state
2439                 $origin = $item['origin'];
2440                 $parent = $item['parent'];
2441
2442                 // Preparing public shadow (removing user specific data)
2443                 $item['uid'] = 0;
2444                 unset($item['id']);
2445                 unset($item['parent']);
2446                 unset($item['wall']);
2447                 unset($item['mention']);
2448                 unset($item['origin']);
2449                 unset($item['starred']);
2450                 unset($item['postopts']);
2451                 unset($item['inform']);
2452                 unset($item['post-type']);
2453                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2454
2455                 $public_shadow = self::insert($item, false, true);
2456
2457                 Logger::info('Stored public shadow', ['uri' => $item['uri'], 'id' => $public_shadow]);
2458
2459                 // If this was a comment to a Diaspora post we don't get our comment back.
2460                 // This means that we have to distribute the comment by ourselves.
2461                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2462                         self::distribute($public_shadow);
2463                 }
2464         }
2465
2466         /**
2467          * Adds a language specification in a "language" element of given $arr.
2468          * Expects "body" element to exist in $arr.
2469          *
2470          * @param array $item
2471          * @return string detected language
2472          * @throws \Text_LanguageDetect_Exception
2473          */
2474         private static function getLanguage(array $item)
2475         {
2476                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
2477                         return '';
2478                 }
2479
2480                 // Convert attachments to links
2481                 $naked_body = BBCode::removeAttachment($item['body']);
2482                 if (empty($naked_body)) {
2483                         return '';
2484                 }
2485
2486                 // Remove links and pictures
2487                 $naked_body = BBCode::removeLinks($naked_body);
2488
2489                 // Convert the title and the body to plain text
2490                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
2491
2492                 // Remove possibly remaining links
2493                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
2494
2495                 if (empty($naked_body)) {
2496                         return '';
2497                 }
2498
2499                 $ld = new Language(DI::l10n()->getAvailableLanguages());
2500                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
2501                 if (is_array($languages)) {
2502                         return json_encode($languages);
2503                 }
2504
2505                 return '';
2506         }
2507
2508         public static function getLanguageMessage(array $item)
2509         {
2510                 $iso639 = new \Matriphe\ISO639\ISO639;
2511
2512                 $used_languages = '';
2513                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2514                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
2515                 }
2516                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2517                 return $used_languages;
2518         }
2519
2520         /**
2521          * Creates an unique guid out of a given uri
2522          *
2523          * @param string $uri uri of an item entry
2524          * @param string $host hostname for the GUID prefix
2525          * @return string unique guid
2526          */
2527         public static function guidFromUri($uri, $host)
2528         {
2529                 // Our regular guid routine is using this kind of prefix as well
2530                 // We have to avoid that different routines could accidentally create the same value
2531                 $parsed = parse_url($uri);
2532
2533                 // We use a hash of the hostname as prefix for the guid
2534                 $guid_prefix = hash("crc32", $host);
2535
2536                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2537                 unset($parsed["scheme"]);
2538
2539                 // Glue it together to be able to make a hash from it
2540                 $host_id = implode("/", $parsed);
2541
2542                 // We could use any hash algorithm since it isn't a security issue
2543                 $host_hash = hash("ripemd128", $host_id);
2544
2545                 return $guid_prefix.$host_hash;
2546         }
2547
2548         /**
2549          * generate an unique URI
2550          *
2551          * @param integer $uid  User id
2552          * @param string  $guid An existing GUID (Otherwise it will be generated)
2553          *
2554          * @return string
2555          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2556          */
2557         public static function newURI($uid, $guid = "")
2558         {
2559                 if ($guid == "") {
2560                         $guid = System::createUUID();
2561                 }
2562
2563                 return DI::baseUrl()->get() . '/objects/' . $guid;
2564         }
2565
2566         /**
2567          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2568          *
2569          * This can be used to filter for inactive contacts.
2570          * Only do this for public postings to avoid privacy problems, since poco data is public.
2571          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2572          *
2573          * @param array $arr Contains the just posted item record
2574          * @throws \Exception
2575          */
2576         private static function updateContact($arr)
2577         {
2578                 // Unarchive the author
2579                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2580                 if (DBA::isResult($contact)) {
2581                         Contact::unmarkForArchival($contact);
2582                 }
2583
2584                 // Unarchive the contact if it's not our own contact
2585                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2586                 if (DBA::isResult($contact)) {
2587                         Contact::unmarkForArchival($contact);
2588                 }
2589
2590                 /// @todo On private posts we could obfuscate the date
2591                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2592
2593                 // Is it a forum? Then we don't care about the rules from above
2594                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2595                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2596                                 $update = true;
2597                         }
2598                 }
2599
2600                 if ($update) {
2601                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2602                         // So we have to ensure to only update the last item when it had been our own post,
2603                         // or it had been done by a "regular" contact.
2604                         if (!empty($arr['wall'])) {
2605                                 $condition = ['id' => $arr['contact-id']];
2606                         } else {
2607                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2608                         }
2609                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2610                 }
2611                 // Now do the same for the system wide contacts with uid=0
2612                 if ($arr['private'] != self::PRIVATE) {
2613                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2614                                 ['id' => $arr['owner-id']]);
2615
2616                         if ($arr['owner-id'] != $arr['author-id']) {
2617                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2618                                         ['id' => $arr['author-id']]);
2619                         }
2620                 }
2621         }
2622
2623         public static function setHashtags($body)
2624         {
2625                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code'], function ($body) {
2626                         $tags = BBCode::getTags($body);
2627
2628                         // No hashtags?
2629                         if (!count($tags)) {
2630                                 return $body;
2631                         }
2632
2633                         // This sorting is important when there are hashtags that are part of other hashtags
2634                         // Otherwise there could be problems with hashtags like #test and #test2
2635                         // Because of this we are sorting from the longest to the shortest tag.
2636                         usort($tags, function ($a, $b) {
2637                                 return strlen($b) <=> strlen($a);
2638                         });
2639
2640                         $URLSearchString = "^\[\]";
2641
2642                         // All hashtags should point to the home server if "local_tags" is activated
2643                         if (DI::config()->get('system', 'local_tags')) {
2644                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2645                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2646                         }
2647
2648                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2649                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2650                                 function ($match) {
2651                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2652                                 }, $body);
2653
2654                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2655                                 function ($match) {
2656                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2657                                 }, $body);
2658
2659                         $body = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2660                                 function ($match) {
2661                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2662                                 }, $body);
2663
2664                         // Repair recursive urls
2665                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2666                                 "&num;$2", $body);
2667
2668                         foreach ($tags as $tag) {
2669                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2670                                         continue;
2671                                 }
2672
2673                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2674                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2675
2676                                 $body = str_replace($tag, $newtag, $body);
2677                         }
2678
2679                         // Convert back the masked hashtags
2680                         $body = str_replace("&num;", "#", $body);
2681
2682                         return $body;
2683                 });
2684
2685                 return $body;
2686         }
2687
2688         /**
2689          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2690          *
2691          * @param int $uid
2692          * @param int $item_id
2693          * @return boolean true if item was deleted, else false
2694          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2695          * @throws \ImagickException
2696          */
2697         private static function tagDeliver($uid, $item_id)
2698         {
2699                 $mention = false;
2700
2701                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2702                 if (!DBA::isResult($user)) {
2703                         return false;
2704                 }
2705
2706                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2707                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2708
2709                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2710                 if (!DBA::isResult($item)) {
2711                         return false;
2712                 }
2713
2714                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2715
2716                 /*
2717                  * Diaspora uses their own hardwired link URL in @-tags
2718                  * instead of the one we supply with webfinger
2719                  */
2720                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2721
2722                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2723                 if ($cnt) {
2724                         foreach ($matches as $mtch) {
2725                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2726                                         $mention = true;
2727                                         Logger::log('mention found: ' . $mtch[2]);
2728                                 }
2729                         }
2730                 }
2731
2732                 if (!$mention) {
2733                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
2734                         foreach ($tags as $tag) {
2735                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
2736                                         $mention = true;
2737                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
2738                                 }
2739                         }
2740                 }
2741
2742                 if (!$mention) {
2743                         if (($community_page || $prvgroup) &&
2744                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
2745                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2746                                 DBA::delete('item', ['id' => $item_id]);
2747                                 return true;
2748                         }
2749                         return false;
2750                 }
2751
2752                 $arr = ['item' => $item, 'user' => $user];
2753
2754                 Hook::callAll('tagged', $arr);
2755
2756                 if (!$community_page && !$prvgroup) {
2757                         return false;
2758                 }
2759
2760                 /*
2761                  * tgroup delivery - setup a second delivery chain
2762                  * prevent delivery looping - only proceed
2763                  * if the message originated elsewhere and is a top-level post
2764                  */
2765                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2766                         return false;
2767                 }
2768
2769                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2770                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2771                 if (!DBA::isResult($self)) {
2772                         return false;
2773                 }
2774
2775                 $owner_id = Contact::getIdForURL($self['url']);
2776
2777                 // also reset all the privacy bits to the forum default permissions
2778
2779                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2780
2781                 $psid = PermissionSet::getIdFromACL(
2782                         $user['uid'],
2783                         $user['allow_cid'],
2784                         $user['allow_gid'],
2785                         $user['deny_cid'],
2786                         $user['deny_gid']
2787                 );
2788
2789                 $forum_mode = ($prvgroup ? 2 : 1);
2790
2791                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2792                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2793                 self::update($fields, ['id' => $item_id]);
2794
2795                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2796
2797                 Item::performActivity($item_id, 'announce', $uid);
2798
2799                 return false;
2800         }
2801
2802         /**
2803          * Automatically reshare the item if the "remote_self" option is selected
2804          *
2805          * @param array $item
2806          * @return void
2807          */
2808         private static function autoReshare(array $item)
2809         {
2810                 if ($item['gravity'] != GRAVITY_PARENT) {
2811                         return;
2812                 }
2813
2814                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2815                         return;
2816                 }
2817
2818                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2819                         return;
2820                 }
2821
2822                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2823
2824                 Item::performActivity($item['id'], 'announce', $item['uid']);
2825         }
2826
2827         public static function isRemoteSelf($contact, &$datarray)
2828         {
2829                 if (!$contact['remote_self']) {
2830                         return false;
2831                 }
2832
2833                 // Prevent the forwarding of posts that are forwarded
2834                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2835                         Logger::info('Already forwarded');
2836                         return false;
2837                 }
2838
2839                 // Prevent to forward already forwarded posts
2840                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2841                         Logger::info('Already forwarded (second test)');
2842                         return false;
2843                 }
2844
2845                 // Only forward posts
2846                 if ($datarray["verb"] != Activity::POST) {
2847                         Logger::info('No post');
2848                         return false;
2849                 }
2850
2851                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2852                         Logger::info('Not public');
2853                         return false;
2854                 }
2855
2856                 $datarray2 = $datarray;
2857                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2858                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2859                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2860                                         ['uid' => $contact['uid'], 'self' => true]);
2861                         if (DBA::isResult($self)) {
2862                                 $datarray['contact-id'] = $self["id"];
2863
2864                                 $datarray['owner-name'] = $self["name"];
2865                                 $datarray['owner-link'] = $self["url"];
2866                                 $datarray['owner-avatar'] = $self["thumb"];
2867
2868                                 $datarray['author-name']   = $datarray['owner-name'];
2869                                 $datarray['author-link']   = $datarray['owner-link'];
2870                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2871
2872                                 unset($datarray['edited']);
2873
2874                                 unset($datarray['network']);
2875                                 unset($datarray['owner-id']);
2876                                 unset($datarray['author-id']);
2877                         }
2878
2879                         if ($contact['network'] != Protocol::FEED) {
2880                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2881                                 $datarray["guid"] = System::createUUID();
2882                                 unset($datarray["plink"]);
2883                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2884                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2885                                 $datarray["extid"] = Protocol::DFRN;
2886                                 $urlpart = parse_url($datarray2['author-link']);
2887                                 $datarray["app"] = $urlpart["host"];
2888                                 if (!empty($old_uri_id)) {
2889                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2890                                 }
2891
2892                                 unset($datarray["parent-uri"]);
2893                                 unset($datarray["thr-parent"]);
2894                         } else {
2895                                 $datarray['private'] = self::PUBLIC;
2896                         }
2897                 }
2898
2899                 if ($contact['network'] != Protocol::FEED) {
2900                         // Store the original post
2901                         $result = self::insert($datarray2);
2902                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2903                 } else {
2904                         $datarray["app"] = "Feed";
2905                         $result = true;
2906                 }
2907
2908                 // Trigger automatic reactions for addons
2909                 $datarray['api_source'] = true;
2910
2911                 // We have to tell the hooks who we are - this really should be improved
2912                 $_SESSION["authenticated"] = true;
2913                 $_SESSION["uid"] = $contact['uid'];
2914
2915                 return $result;
2916         }
2917
2918         /**
2919          *
2920          * @param string $s
2921          * @param int    $uid
2922          * @param array  $item
2923          * @param int    $cid
2924          * @return string
2925          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2926          * @throws \ImagickException
2927          */
2928         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2929         {
2930                 if (DI::config()->get('system', 'disable_embedded')) {
2931                         return $s;
2932                 }
2933
2934                 Logger::info('check for photos');
2935                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2936
2937                 $orig_body = $s;
2938                 $new_body = '';
2939
2940                 $img_start = strpos($orig_body, '[img');
2941                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2942                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2943
2944                 while (($img_st_close !== false) && ($img_len !== false)) {
2945                         $img_st_close++; // make it point to AFTER the closing bracket
2946                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2947
2948                         Logger::info('found photo', ['image' => $image]);
2949
2950                         if (stristr($image, $site . '/photo/')) {
2951                                 // Only embed locally hosted photos
2952                                 $replace = false;
2953                                 $i = basename($image);
2954                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2955                                 $x = strpos($i, '-');
2956
2957                                 if ($x) {
2958                                         $res = substr($i, $x + 1);
2959                                         $i = substr($i, 0, $x);
2960                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2961                                         if (DBA::isResult($photo)) {
2962                                                 /*
2963                                                  * Check to see if we should replace this photo link with an embedded image
2964                                                  * 1. No need to do so if the photo is public
2965                                                  * 2. If there's a contact-id provided, see if they're in the access list
2966                                                  *    for the photo. If so, embed it.
2967                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2968                                                  *    permissions, regardless of order but first check to see if they're an exact
2969                                                  *    match to save some processing overhead.
2970                                                  */
2971                                                 if (self::hasPermissions($photo)) {
2972                                                         if ($cid) {
2973                                                                 $recips = self::enumeratePermissions($photo);
2974                                                                 if (in_array($cid, $recips)) {
2975                                                                         $replace = true;
2976                                                                 }
2977                                                         } elseif ($item) {
2978                                                                 if (self::samePermissions($uid, $item, $photo)) {
2979                                                                         $replace = true;
2980                                                                 }
2981                                                         }
2982                                                 }
2983                                                 if ($replace) {
2984                                                         $photo_img = Photo::getImageForPhoto($photo);
2985                                                         // If a custom width and height were specified, apply before embedding
2986                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2987                                                                 Logger::info('scaling photo');
2988
2989                                                                 $width = intval($match[1]);
2990                                                                 $height = intval($match[2]);
2991
2992                                                                 $photo_img->scaleDown(max($width, $height));
2993                                                         }
2994
2995                                                         $data = $photo_img->asString();
2996                                                         $type = $photo_img->getType();
2997
2998                                                         Logger::info('replacing photo');
2999                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
3000                                                         Logger::debug('replaced', ['image' => $image]);
3001                                                 }
3002                                         }
3003                                 }
3004                         }
3005
3006                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
3007                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
3008                         if ($orig_body === false) {
3009                                 $orig_body = '';
3010                         }
3011
3012                         $img_start = strpos($orig_body, '[img');
3013                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
3014                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
3015                 }
3016
3017                 $new_body = $new_body . $orig_body;
3018
3019                 return $new_body;
3020         }
3021
3022         private static function hasPermissions($obj)
3023         {
3024                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
3025                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
3026         }
3027
3028         private static function samePermissions($uid, $obj1, $obj2)
3029         {
3030                 // first part is easy. Check that these are exactly the same.
3031                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
3032                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
3033                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
3034                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
3035                         return true;
3036                 }
3037
3038                 // This is harder. Parse all the permissions and compare the resulting set.
3039                 $recipients1 = self::enumeratePermissions($obj1);
3040                 $recipients2 = self::enumeratePermissions($obj2);
3041                 sort($recipients1);
3042                 sort($recipients2);
3043
3044                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
3045                 return ($recipients1 == $recipients2);
3046         }
3047
3048         /**
3049          * Returns an array of contact-ids that are allowed to see this object
3050          *
3051          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
3052          * @param bool  $check_dead Prunes unavailable contacts from the result
3053          * @return array
3054          * @throws \Exception
3055          */
3056         public static function enumeratePermissions(array $obj, bool $check_dead = false)
3057         {
3058                 $aclFormater = DI::aclFormatter();
3059
3060                 $allow_people = $aclFormater->expand($obj['allow_cid']);
3061                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
3062                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
3063                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
3064                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
3065                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
3066                 $recipients   = array_diff($recipients, $deny);
3067                 return $recipients;
3068         }
3069
3070         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
3071         {
3072                 if (!$uid || ($days < 1)) {
3073                         return;
3074                 }
3075
3076                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
3077                         $uid, GRAVITY_PARENT];
3078
3079                 /*
3080                  * $expire_network_only = save your own wall posts
3081                  * and just expire conversations started by others
3082                  */
3083                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3084
3085                 if ($expire_network_only) {
3086                         $condition[0] .= " AND NOT `wall`";
3087                 }
3088
3089                 if ($network != "") {
3090                         $condition[0] .= " AND `network` = ?";
3091                         $condition[] = $network;
3092                 }
3093
3094                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3095                 $condition[] = $days;
3096
3097                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3098
3099                 if (!DBA::isResult($items)) {
3100                         return;
3101                 }
3102
3103                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3104
3105                 // Forcing expiring of items - but not notes and marked items
3106                 if ($force) {
3107                         $expire_items = true;
3108                 }
3109
3110                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3111                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3112                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3113
3114                 $expired = 0;
3115
3116                 $priority = DI::config()->get('system', 'expire-notify-priority');
3117
3118                 while ($item = Item::fetch($items)) {
3119                         // don't expire filed items
3120
3121                         if (strpos($item['file'], '[') !== false) {
3122                                 continue;
3123                         }
3124
3125                         // Only expire posts, not photos and photo comments
3126
3127                         if (!$expire_photos && strlen($item['resource-id'])) {
3128                                 continue;
3129                         } elseif (!$expire_starred && intval($item['starred'])) {
3130                                 continue;
3131                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3132                                 continue;
3133                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3134                                 continue;
3135                         }
3136
3137                         self::markForDeletionById($item['id'], $priority);
3138
3139                         ++$expired;
3140                 }
3141                 DBA::close($items);
3142                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3143         }
3144
3145         public static function firstPostDate($uid, $wall = false)
3146         {
3147                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3148                 $params = ['order' => ['received' => false]];
3149                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3150                 if (DBA::isResult($thread)) {
3151                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3152                 }
3153                 return false;
3154         }
3155
3156         /**
3157          * add/remove activity to an item
3158          *
3159          * Toggle activities as like,dislike,attend of an item
3160          *
3161          * @param int $item_id
3162          * @param string $verb
3163          *            Activity verb. One of
3164          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3165          *            attendno, unattendno, attendmaybe, unattendmaybe,
3166          *            announce, unannouce
3167          * @return bool
3168          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3169          * @throws \ImagickException
3170          * @hook  'post_local_end'
3171          *            array $arr
3172          *            'post_id' => ID of posted item
3173          */
3174         public static function performActivity(int $item_id, string $verb, int $uid)
3175         {
3176                 if (empty($uid)) {
3177                         return false;
3178                 }
3179
3180                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
3181
3182                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
3183                 if (!DBA::isResult($item)) {
3184                         Logger::log('like: unknown item ' . $item_id);
3185                         return false;
3186                 }
3187
3188                 $item_uri = $item['uri'];
3189
3190                 if (!in_array($item['uid'], [0, $uid])) {
3191                         return false;
3192                 }
3193
3194                 if (!Item::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
3195                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
3196                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
3197                                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
3198                                 if (!DBA::isResult($item)) {
3199                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'item-uri' => $item_uri]);
3200                                         return false;
3201                                 }
3202                         }
3203                 }
3204
3205                 // Retrieves the local post owner
3206                 $owner = User::getOwnerDataById($uid);
3207                 if (empty($owner)) {
3208                         Logger::info('Empty owner for user', ['uid' => $uid]);
3209                         return false;
3210                 }
3211
3212                 // Retrieve the current logged in user's public contact
3213                 $author_id = Contact::getIdForURL($owner['url']);
3214                 if (empty($author_id)) {
3215                         Logger::info('Empty public contact');
3216                         return false;
3217                 }
3218
3219                 $activity = null;
3220                 switch ($verb) {
3221                         case 'like':
3222                         case 'unlike':
3223                                 $activity = Activity::LIKE;
3224                                 break;
3225                         case 'dislike':
3226                         case 'undislike':
3227                                 $activity = Activity::DISLIKE;
3228                                 break;
3229                         case 'attendyes':
3230                         case 'unattendyes':
3231                                 $activity = Activity::ATTEND;
3232                                 break;
3233                         case 'attendno':
3234                         case 'unattendno':
3235                                 $activity = Activity::ATTENDNO;
3236                                 break;
3237                         case 'attendmaybe':
3238                         case 'unattendmaybe':
3239                                 $activity = Activity::ATTENDMAYBE;
3240                                 break;
3241                         case 'follow':
3242                         case 'unfollow':
3243                                 $activity = Activity::FOLLOW;
3244                                 break;
3245                         case 'announce':
3246                         case 'unannounce':
3247                                 $activity = Activity::ANNOUNCE;
3248                                 break;
3249                         default:
3250                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
3251                                 return false;
3252                 }
3253
3254                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
3255
3256                 // Enable activity toggling instead of on/off
3257                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3258
3259                 // Look for an existing verb row
3260                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
3261                 if ($event_verb_flag) {
3262                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3263
3264                         // Translate to the index based activity index
3265                         $vids = [];
3266                         foreach ($verbs as $verb) {
3267                                 $vids[] = Verb::getID($verb);
3268                         }
3269                 } else {
3270                         $vids = Verb::getID($activity);
3271                 }
3272
3273                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3274                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3275                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3276
3277                 if (DBA::isResult($like_item)) {
3278                         /**
3279                          * Truth table for existing activities
3280                          *
3281                          * |          Inputs            ||      Outputs      |
3282                          * |----------------------------||-------------------|
3283                          * |  Mode  | Event | Same verb || Delete? | Return? |
3284                          * |--------|-------|-----------||---------|---------|
3285                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
3286                          * | create |  Yes  |    No     ||   Yes   |   No    |
3287                          * | create |  No   |    Yes    ||   No    |   Yes   |
3288                          * | create |  No   |    No     ||        N/A†       |
3289                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
3290                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
3291                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
3292                          * | delete |  No   |    No     ||        N/A†       |
3293                          * |--------|-------|-----------||---------|---------|
3294                          * |   A    |   B   |     C     || A xor C | !B or C |
3295                          *
3296                          * † Can't happen: It's impossible to find an existing non-event activity without
3297                          *                 the same verb because we are only looking for this single verb.
3298                          *
3299                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
3300                          */
3301                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
3302                                 self::markForDeletionById($like_item['id']);
3303                         }
3304
3305                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3306                                 return true;
3307                         }
3308                 }
3309
3310                 // No need to go further if we aren't creating anything
3311                 if ($mode == 'delete') {
3312                         return true;
3313                 }
3314
3315                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3316
3317                 $new_item = [
3318                         'guid'          => System::createUUID(),
3319                         'uri'           => self::newURI($item['uid']),
3320                         'uid'           => $item['uid'],
3321                         'contact-id'    => $owner['id'],
3322                         'wall'          => $item['wall'],
3323                         'origin'        => 1,
3324                         'network'       => Protocol::DFRN,
3325                         'gravity'       => GRAVITY_ACTIVITY,
3326                         'parent'        => $item['id'],
3327                         'thr-parent'    => $item['uri'],
3328                         'owner-id'      => $author_id,
3329                         'author-id'     => $author_id,
3330                         'body'          => $activity,
3331                         'verb'          => $activity,
3332                         'object-type'   => $objtype,
3333                         'allow_cid'     => $item['allow_cid'],
3334                         'allow_gid'     => $item['allow_gid'],
3335                         'deny_cid'      => $item['deny_cid'],
3336                         'deny_gid'      => $item['deny_gid'],
3337                         'visible'       => 1,
3338                         'unseen'        => 1,
3339                 ];
3340
3341                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3342                 if (!empty($signed)) {
3343                         $new_item['diaspora_signed_text'] = json_encode($signed);
3344                 }
3345
3346                 $new_item_id = self::insert($new_item);
3347
3348                 // If the parent item isn't visible then set it to visible
3349                 if (!$item['visible']) {
3350                         self::update(['visible' => true], ['id' => $item['id']]);
3351                 }
3352
3353                 $new_item['id'] = $new_item_id;
3354
3355                 Hook::callAll('post_local_end', $new_item);
3356
3357                 return true;
3358         }
3359
3360         private static function addThread($itemid, $onlyshadow = false)
3361         {
3362                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3363                         'moderated', 'visible', 'starred', 'contact-id', 'post-type', 'uri-id',
3364                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3365                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3366                 $item = self::selectFirst($fields, $condition);
3367
3368                 if (!DBA::isResult($item)) {
3369                         return;
3370                 }
3371
3372                 $item['iid'] = $itemid;
3373
3374                 if (!$onlyshadow) {
3375                         $result = DBA::replace('thread', $item);
3376
3377                         Logger::info('Add thread', ['item' => $itemid, 'result' => $result]);
3378                 }
3379         }
3380
3381         private static function updateThread($itemid, $setmention = false)
3382         {
3383                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3384                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id', 'uri-id',
3385                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3386
3387                 $item = self::selectFirst($fields, ['id' => $itemid, 'gravity' => GRAVITY_PARENT]);
3388                 if (!DBA::isResult($item)) {
3389                         return;
3390                 }
3391
3392                 if ($setmention) {
3393                         $item["mention"] = 1;
3394                 }
3395
3396                 $fields = [];
3397
3398                 foreach ($item as $field => $data) {
3399                         if (!in_array($field, ["guid"])) {
3400                                 $fields[$field] = $data;
3401                         }
3402                 }
3403
3404                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3405
3406                 Logger::info('Update thread', ['item' => $itemid, 'guid' => $item["guid"], 'result' => $result]);
3407         }
3408
3409         private static function deleteThread($itemid, $itemuri = "")
3410         {
3411                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3412                 if (!DBA::isResult($item)) {
3413                         Logger::info('No thread found', ['id' => $itemid]);
3414                         return;
3415                 }
3416
3417                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3418
3419                 Logger::info('Deleted thread', ['item' => $itemid, 'result' => $result]);
3420
3421                 if ($itemuri != "") {
3422                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3423                         if (!self::exists($condition)) {
3424                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3425                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3426                         }
3427                 }
3428         }
3429
3430         /**
3431          * Fetch the SQL condition for the given user id
3432          *
3433          * @param integer $owner_id User ID for which the permissions should be fetched
3434          * @return array condition
3435          */
3436         public static function getPermissionsConditionArrayByUserId(int $owner_id)
3437         {
3438                 $local_user = local_user();
3439                 $remote_user = Session::getRemoteContactID($owner_id);
3440
3441                 // default permissions - anonymous user
3442                 $condition = ["`private` != ?", self::PRIVATE];
3443
3444                 if ($local_user && ($local_user == $owner_id)) {
3445                         // Profile owner - everything is visible
3446                         $condition = [];
3447                 } elseif ($remote_user) {
3448                          // Authenticated visitor - fetch the matching permissionsets
3449                         $set = PermissionSet::get($owner_id, $remote_user);
3450                         if (!empty($set)) {
3451                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
3452                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
3453                                         Item::PRIVATE, Item::PRIVATE];
3454                                 $condition = array_merge($condition, $set);
3455                         }
3456                 }
3457
3458                 return $condition;
3459         }
3460
3461         public static function getPermissionsSQLByUserId($owner_id)
3462         {
3463                 $local_user = local_user();
3464                 $remote_user = Session::getRemoteContactID($owner_id);
3465
3466                 /*
3467                  * Construct permissions
3468                  *
3469                  * default permissions - anonymous user
3470                  */
3471                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3472
3473                 // Profile owner - everything is visible
3474                 if ($local_user && ($local_user == $owner_id)) {
3475                         $sql = '';
3476                 } elseif ($remote_user) {
3477                         /*
3478                          * Authenticated visitor. Unless pre-verified,
3479                          * check that the contact belongs to this $owner_id
3480                          * and load the groups the visitor belongs to.
3481                          * If pre-verified, the caller is expected to have already
3482                          * done this and passed the groups into this function.
3483                          */
3484                         $set = PermissionSet::get($owner_id, $remote_user);
3485
3486                         if (!empty($set)) {
3487                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3488                         } else {
3489                                 $sql_set = '';
3490                         }
3491
3492                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3493                 }
3494
3495                 return $sql;
3496         }
3497
3498         /**
3499          * get translated item type
3500          *
3501          * @param $item
3502          * @return string
3503          */
3504         public static function postType($item)
3505         {
3506                 if (!empty($item['event-id'])) {
3507                         return DI::l10n()->t('event');
3508                 } elseif (!empty($item['resource-id'])) {
3509                         return DI::l10n()->t('photo');
3510                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
3511                         return DI::l10n()->t('activity');
3512                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
3513                         return DI::l10n()->t('comment');
3514                 }
3515
3516                 return DI::l10n()->t('post');
3517         }
3518
3519         /**
3520          * Sets the "rendered-html" field of the provided item
3521          *
3522          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3523          *
3524          * @param array $item
3525          * @param bool  $update
3526          *
3527          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3528          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3529          */
3530         public static function putInCache(&$item, $update = false)
3531         {
3532                 // Save original body to prevent addons to modify it
3533                 $body = $item['body'];
3534
3535                 $rendered_hash = $item['rendered-hash'] ?? '';
3536                 $rendered_html = $item['rendered-html'] ?? '';
3537
3538                 if ($rendered_hash == ''
3539                         || $rendered_html == ''
3540                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
3541                         || DI::config()->get('system', 'ignore_cache')
3542                 ) {
3543                         self::addRedirToImageTags($item);
3544
3545                         $item['rendered-html'] = BBCode::convert($item['body']);
3546                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
3547
3548                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3549                         Hook::callAll('put_item_in_cache', $hook_data);
3550                         $item['rendered-html'] = $hook_data['rendered-html'];
3551                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3552                         unset($hook_data);
3553
3554                         // Force an update if the generated values differ from the existing ones
3555                         if ($rendered_hash != $item['rendered-hash']) {
3556                                 $update = true;
3557                         }
3558
3559                         // Only compare the HTML when we forcefully ignore the cache
3560                         if (DI::config()->get('system', 'ignore_cache') && ($rendered_html != $item['rendered-html'])) {
3561                                 $update = true;
3562                         }
3563
3564                         if ($update && !empty($item['id'])) {
3565                                 self::update(
3566                                         [
3567                                                 'rendered-html' => $item['rendered-html'],
3568                                                 'rendered-hash' => $item['rendered-hash']
3569                                         ],
3570                                         ['id' => $item['id']]
3571                                 );
3572                         }
3573                 }
3574
3575                 $item['body'] = $body;
3576         }
3577
3578         /**
3579          * Find any non-embedded images in private items and add redir links to them
3580          *
3581          * @param array &$item The field array of an item row
3582          */
3583         private static function addRedirToImageTags(array &$item)
3584         {
3585                 $app = DI::app();
3586
3587                 $matches = [];
3588                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3589                 if ($cnt) {
3590                         foreach ($matches as $mtch) {
3591                                 if (strpos($mtch[1], '/redir') !== false) {
3592                                         continue;
3593                                 }
3594
3595                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3596                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3597                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3598                                 }
3599                         }
3600                 }
3601         }
3602
3603         /**
3604          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3605          * If attach is true, also add icons for item attachments.
3606          *
3607          * @param array   $item
3608          * @param boolean $attach
3609          * @param boolean $is_preview
3610          * @return string item body html
3611          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3612          * @throws \ImagickException
3613          * @hook  prepare_body_init item array before any work
3614          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3615          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3616          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3617          */
3618         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3619         {
3620                 $a = DI::app();
3621                 Hook::callAll('prepare_body_init', $item);
3622
3623                 // In order to provide theme developers more possibilities, event items
3624                 // are treated differently.
3625                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3626                         $ev = Event::getItemHTML($item);
3627                         return $ev;
3628                 }
3629
3630                 $tags = Tag::populateFromItem($item);
3631
3632                 $item['tags'] = $tags['tags'];
3633                 $item['hashtags'] = $tags['hashtags'];
3634                 $item['mentions'] = $tags['mentions'];
3635
3636                 // Compile eventual content filter reasons
3637                 $filter_reasons = [];
3638                 if (!$is_preview && public_contact() != $item['author-id']) {
3639                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3640                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3641                         }
3642
3643                         $hook_data = [
3644                                 'item' => $item,
3645                                 'filter_reasons' => $filter_reasons
3646                         ];
3647                         Hook::callAll('prepare_body_content_filter', $hook_data);
3648                         $filter_reasons = $hook_data['filter_reasons'];
3649                         unset($hook_data);
3650                 }
3651
3652                 // Update the cached values if there is no "zrl=..." on the links.
3653                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3654
3655                 // Or update it if the current viewer is the intented viewer.
3656                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3657                         $update = true;
3658                 }
3659
3660                 self::putInCache($item, $update);
3661                 $s = $item["rendered-html"];
3662
3663                 $hook_data = [
3664                         'item' => $item,
3665                         'html' => $s,
3666                         'preview' => $is_preview,
3667                         'filter_reasons' => $filter_reasons
3668                 ];
3669                 Hook::callAll('prepare_body', $hook_data);
3670                 $s = $hook_data['html'];
3671                 unset($hook_data);
3672
3673                 if (!$attach) {
3674                         // Replace the blockquotes with quotes that are used in mails.
3675                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3676                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3677                         return $s;
3678                 }
3679
3680                 $as = '';
3681                 $vhead = false;
3682                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT, Post\Media::TORRENT, Post\Media::UNKNOWN]) as $attachment) {
3683                         $mime = $attachment['mimetype'];
3684
3685                         $the_url = Contact::magicLinkById($item['author-id'], $attachment['url']);
3686
3687                         if (strpos($mime, 'video') !== false) {
3688                                 if (!$vhead) {
3689                                         $vhead = true;
3690                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3691                                 }
3692
3693                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3694                                         '$video' => [
3695                                                 'id'     => $item['author-id'],
3696                                                 'title'  => DI::l10n()->t('View Video'),
3697                                                 'src'    => $the_url,
3698                                                 'mime'   => $mime,
3699                                         ],
3700                                 ]);
3701                         }
3702
3703                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3704                         if ($filetype) {
3705                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3706                                 $filesubtype = str_replace('.', '-', $filesubtype);
3707                         } else {
3708                                 $filetype = 'unkn';
3709                                 $filesubtype = 'unkn';
3710                         }
3711
3712                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3713                         $title .= ' ' . ($attachment['size'] ?? 0) . ' ' . DI::l10n()->t('bytes');
3714
3715                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3716                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3717                 }
3718
3719                 if ($as != '') {
3720                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3721                 }
3722
3723                 // Map.
3724                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3725                         $x = Map::byCoordinates(trim($item['coord']));
3726                         if ($x) {
3727                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3728                         }
3729                 }
3730
3731                 // Replace friendica image url size with theme preference.
3732                 if (!empty($a->theme_info['item_image_size'])) {
3733                         $ps = $a->theme_info['item_image_size'];
3734                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3735                 }
3736
3737                 $s = HTML::applyContentFilter($s, $filter_reasons);
3738
3739                 $hook_data = ['item' => $item, 'html' => $s];
3740                 Hook::callAll('prepare_body_final', $hook_data);
3741
3742                 return $hook_data['html'];
3743         }
3744
3745         /**
3746          * get private link for item
3747          *
3748          * @param array $item
3749          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3750          * @throws \Exception
3751          */
3752         public static function getPlink($item)
3753         {
3754                 if (local_user()) {
3755                         $ret = [
3756                                 'href' => "display/" . $item['guid'],
3757                                 'orig' => "display/" . $item['guid'],
3758                                 'title' => DI::l10n()->t('View on separate page'),
3759                                 'orig_title' => DI::l10n()->t('view on separate page'),
3760                         ];
3761
3762                         if (!empty($item['plink'])) {
3763                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3764                                 $ret["title"] = DI::l10n()->t('link to source');
3765                         }
3766                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3767                         $ret = [
3768                                 'href' => $item['plink'],
3769                                 'orig' => $item['plink'],
3770                                 'title' => DI::l10n()->t('link to source'),
3771                         ];
3772                 } else {
3773                         $ret = [];
3774                 }
3775
3776                 return $ret;
3777         }
3778
3779         /**
3780          * Is the given item array a post that is sent as starting post to a forum?
3781          *
3782          * @param array $item
3783          * @param array $owner
3784          *
3785          * @return boolean "true" when it is a forum post
3786          */
3787         public static function isForumPost(array $item, array $owner = [])
3788         {
3789                 if (empty($owner)) {
3790                         $owner = User::getOwnerDataById($item['uid']);
3791                         if (empty($owner)) {
3792                                 return false;
3793                         }
3794                 }
3795
3796                 if (($item['author-id'] == $item['owner-id']) ||
3797                         ($owner['id'] == $item['contact-id']) ||
3798                         ($item['uri'] != $item['parent-uri']) ||
3799                         $item['origin']) {
3800                         return false;
3801                 }
3802
3803                 return Contact::isForum($item['contact-id']);
3804         }
3805
3806         /**
3807          * Search item id for given URI or plink
3808          *
3809          * @param string $uri
3810          * @param integer $uid
3811          *
3812          * @return integer item id
3813          */
3814         public static function searchByLink($uri, $uid = 0)
3815         {
3816                 $ssl_uri = str_replace('http://', 'https://', $uri);
3817                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3818
3819                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3820                 if (DBA::isResult($item)) {
3821                         return $item['id'];
3822                 }
3823
3824                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3825                 if (!DBA::isResult($itemcontent)) {
3826                         return 0;
3827                 }
3828
3829                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3830                 if (!DBA::isResult($itemuri)) {
3831                         return 0;
3832                 }
3833
3834                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3835                 if (DBA::isResult($item)) {
3836                         return $item['id'];
3837                 }
3838
3839                 return 0;
3840         }
3841
3842         /**
3843          * Return the URI for a link to the post
3844          *
3845          * @param string $uri URI or link to post
3846          *
3847          * @return string URI
3848          */
3849         public static function getURIByLink(string $uri)
3850         {
3851                 $ssl_uri = str_replace('http://', 'https://', $uri);
3852                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3853
3854                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3855                 if (DBA::isResult($item)) {
3856                         return $item['uri'];
3857                 }
3858
3859                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3860                 if (!DBA::isResult($itemcontent)) {
3861                         return '';
3862                 }
3863
3864                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3865                 if (DBA::isResult($itemuri)) {
3866                         return $itemuri['uri'];
3867                 }
3868
3869                 return '';
3870         }
3871
3872         /**
3873          * Fetches item for given URI or plink
3874          *
3875          * @param string $uri
3876          * @param integer $uid
3877          *
3878          * @return integer item id
3879          */
3880         public static function fetchByLink(string $uri, int $uid = 0)
3881         {
3882                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3883                 $item_id = self::searchByLink($uri, $uid);
3884                 if (!empty($item_id)) {
3885                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3886                         return $item_id;
3887                 }
3888
3889                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3890                         $item_id = self::searchByLink($fetched_uri, $uid);
3891                 } else {
3892                         $item_id = Diaspora::fetchByURL($uri);
3893                 }
3894
3895                 if (!empty($item_id)) {
3896                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3897                         return $item_id;
3898                 }
3899
3900                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3901                 return 0;
3902         }
3903
3904         /**
3905          * Return share data from an item array (if the item is shared item)
3906          * We are providing the complete Item array, because at some time in the future
3907          * we hopefully will define these values not in the body anymore but in some item fields.
3908          * This function is meant to replace all similar functions in the system.
3909          *
3910          * @param array $item
3911          *
3912          * @return array with share information
3913          */
3914         public static function getShareArray($item)
3915         {
3916                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3917                         return [];
3918                 }
3919
3920                 $attribute_string = $matches[2];
3921                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3922                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3923                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3924                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3925                         }
3926                 }
3927                 return $attributes;
3928         }
3929
3930         /**
3931          * Fetch item information for shared items from the original items and adds it.
3932          *
3933          * @param array $item
3934          *
3935          * @return array item array with data from the original item
3936          */
3937         public static function addShareDataFromOriginal(array $item)
3938         {
3939                 $shared = self::getShareArray($item);
3940                 if (empty($shared)) {
3941                         return $item;
3942                 }
3943
3944                 // Real reshares always have got a GUID.
3945                 if (empty($shared['guid'])) {
3946                         return $item;
3947                 }
3948
3949                 $uid = $item['uid'] ?? 0;
3950
3951                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3952                 $shared_item = self::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3953                 if (!DBA::isResult($shared_item)) {
3954                         if (empty($shared['link'])) {
3955                                 return $item;
3956                         }
3957
3958                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3959                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3960                         if (empty($id)) {
3961                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3962                                 return $item;
3963                         }
3964
3965                         $shared_item = self::selectFirst(['title', 'body'], ['id' => $id]);
3966                         if (!DBA::isResult($shared_item)) {
3967                                 return $item;
3968                         }
3969                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3970                 } else {
3971                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3972                 }
3973
3974                 if (!empty($shared_item['title'])) {
3975                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3976                         unset($shared_item['title']);
3977                 } else {
3978                         $body = $shared_item['body'];
3979                 }
3980
3981                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3982                 unset($shared_item['body']);
3983
3984                 return array_merge($item, $shared_item);
3985         }
3986
3987         /**
3988          * Check a prospective item array against user-level permissions
3989          *
3990          * @param array $item Expected keys: uri, gravity, and
3991          *                    author-link if is author-id is set,
3992          *                    owner-link if is owner-id is set,
3993          *                    causer-link if is causer-id is set.
3994          * @param int   $user_id Local user ID
3995          * @return bool
3996          * @throws \Exception
3997          */
3998         protected static function isAllowedByUser(array $item, int $user_id)
3999         {
4000                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
4001                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4002                         return false;
4003                 }
4004
4005                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
4006                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4007                         return false;
4008                 }
4009
4010                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
4011                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
4012                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4013                         return false;
4014                 }
4015
4016                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
4017                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4018                         return false;
4019                 }
4020
4021                 return true;
4022         }
4023 }