src/Model/Item.php

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