src/Model/Item.php

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