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