src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Model\Tag;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\Database\DBStructure;
  36 use Friendica\DI;
  37 use Friendica\Model\Post;
  38 use Friendica\Protocol\Activity;
  39 use Friendica\Protocol\ActivityPub;
  40 use Friendica\Protocol\Diaspora;
  41 use Friendica\Util\DateTimeFormat;
  42 use Friendica\Util\Map;
  43 use Friendica\Util\Network;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use Friendica\Repository\PermissionSet as RepPermissionSet;
  47 use LanguageDetection\Language;
  48
  49 class Item
  50 {
  51         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  52         const PT_ARTICLE = 0;
  53         const PT_NOTE = 1;
  54         const PT_PAGE = 2;
  55         const PT_IMAGE = 16;
  56         const PT_AUDIO = 17;
  57         const PT_VIDEO = 18;
  58         const PT_DOCUMENT = 19;
  59         const PT_EVENT = 32;
  60         const PT_TAG = 64;
  61         const PT_TO = 65;
  62         const PT_CC = 66;
  63         const PT_BTO = 67;
  64         const PT_BCC = 68;
  65         const PT_FOLLOWER = 69;
  66         const PT_ANNOUNCEMENT = 70;
  67         const PT_COMMENT = 71;
  68         const PT_STORED = 72;
  69         const PT_GLOBAL = 73;
  70         const PT_RELAY = 74;
  71         const PT_FETCHED = 75;
  72         const PT_PERSONAL_NOTE = 128;
  73
  74         // Field list that is used to display the items
  75         const DISPLAY_FIELDLIST = [
  76                 'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  77                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  78                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'language',
  79                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  80                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  81                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  82                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  83                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type',
  84                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  85                 'writable', 'self', 'cid', 'alias',
  86                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  87                 'event-summary', 'event-desc', 'event-location', 'event-type',
  88                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  89                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  90         ];
  91
  92         // Field list that is used to deliver items via the protocols
  93         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  94                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  95                         'private', 'title', 'body', 'location', 'coord', 'app',
  96                         'deleted', 'extid', 'post-type', 'gravity',
  97                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  98                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  99                         'signed_text', 'network'];
 100
 101         // Field list for "item-content" table that is mixed with the item table
 102         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
 103                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
 104                         'object-type', 'object', 'target-type', 'target', 'plink'];
 105
 106         // Field list for "item-content" table that is not present in the "item" table
 107         const CONTENT_FIELDLIST = ['language', 'raw-body'];
 108
 109         // All fields in the item table
 110         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 111                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 112                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'psid',
 113                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 114                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 115                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 116                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 117                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 118                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 119                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 120                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 121                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 122
 123         // List of all verbs that don't need additional content data.
 124         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 125         const ACTIVITIES = [
 126                 Activity::LIKE, Activity::DISLIKE,
 127                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 128                 Activity::FOLLOW,
 129                 Activity::ANNOUNCE];
 130
 131         const PUBLIC = 0;
 132         const PRIVATE = 1;
 133         const UNLISTED = 2;
 134
 135         const TABLES = ['item', 'user-item', 'item-content', 'post-delivery-data', 'diaspora-interaction'];
 136
 137         private static $legacy_mode = null;
 138
 139         private static function getItemFields()
 140         {
 141                 $definition = DBStructure::definition('', false);
 142
 143                 $postfields = [];
 144                 foreach (self::TABLES as $table) {
 145                         $postfields[$table] = array_keys($definition[$table]['fields']);
 146                 }
 147
 148                 return $postfields;
 149         }
 150
 151         /**
 152          * Set the pinned state of an item
 153          *
 154          * @param integer $iid    Item ID
 155          * @param integer $uid    User ID
 156          * @param boolean $pinned Pinned state
 157          */
 158         public static function setPinned(int $iid, int $uid, bool $pinned)
 159         {
 160                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 161         }
 162
 163         /**
 164          * Get the pinned state
 165          *
 166          * @param integer $iid Item ID
 167          * @param integer $uid User ID
 168          *
 169          * @return boolean pinned state
 170          */
 171         public static function getPinned(int $iid, int $uid)
 172         {
 173                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 174                 if (!DBA::isResult($useritem)) {
 175                         return false;
 176                 }
 177                 return (bool)$useritem['pinned'];
 178         }
 179
 180         /**
 181          * Select pinned rows from the item table for a given user
 182          *
 183          * @param integer $uid       User ID
 184          * @param array   $selected  Array of selected fields, empty for all
 185          * @param array   $condition Array of fields for condition
 186          * @param array   $params    Array of several parameters
 187          *
 188          * @return boolean|object
 189          * @throws \Exception
 190          */
 191         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 192         {
 193                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 194                 if (!DBA::isResult($useritems)) {
 195                         return $useritems;
 196                 }
 197
 198                 $pinned = [];
 199                 while ($useritem = DBA::fetch($useritems)) {
 200                         $pinned[] = $useritem['iid'];
 201                 }
 202                 DBA::close($useritems);
 203
 204                 if (empty($pinned)) {
 205                         return [];
 206                 }
 207
 208                 $condition = DBA::mergeConditions(['iid' => $pinned], $condition);
 209
 210                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 211         }
 212
 213         /**
 214          * Fetch a single item row
 215          *
 216          * @param mixed $stmt statement object
 217          * @return array|false current row or false
 218          * @throws \Exception
 219          */
 220         public static function fetch($stmt)
 221         {
 222                 $row = DBA::fetch($stmt);
 223
 224                 if (!is_array($row)) {
 225                         return $row;
 226                 }
 227
 228                 $row = DBA::castFields('item', $row);
 229
 230                 // ---------------------- Transform item structure data ----------------------
 231
 232                 // We prefer the data from the user's contact over the public one
 233                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 234                         ($row['author-link'] == $row['contact-link'])) {
 235                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 236                                 $row['author-avatar'] = $row['contact-avatar'];
 237                         }
 238                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 239                                 $row['author-name'] = $row['contact-name'];
 240                         }
 241                 }
 242
 243                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 244                         ($row['owner-link'] == $row['contact-link'])) {
 245                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 246                                 $row['owner-avatar'] = $row['contact-avatar'];
 247                         }
 248                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 249                                 $row['owner-name'] = $row['contact-name'];
 250                         }
 251                 }
 252
 253                 // We can always comment on posts from these networks
 254                 if (array_key_exists('writable', $row) &&
 255                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 256                         $row['writable'] = 1;
 257                 }
 258
 259                 // ---------------------- Transform item content data ----------------------
 260
 261                 if (array_key_exists('verb', $row)) {
 262                         if (!is_null($row['internal-verb'])) {
 263                                 $row['verb'] = $row['internal-verb'];
 264                         }
 265
 266                         if (in_array($row['verb'], self::ACTIVITIES)) {
 267                                 if (array_key_exists('title', $row)) {
 268                                         $row['title'] = '';
 269                                 }
 270                                 if (array_key_exists('body', $row)) {
 271                                         $row['body'] = $row['verb'];
 272                                 }
 273                                 if (array_key_exists('object', $row)) {
 274                                         $row['object'] = '';
 275                                 }
 276                                 if (array_key_exists('object-type', $row)) {
 277                                         $row['object-type'] = Activity\ObjectType::NOTE;
 278                                 }
 279                         } elseif (in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 280                                 // Posts don't have a target - but having tags or files.
 281                                 if (array_key_exists('target', $row)) {
 282                                         $row['target'] = '';
 283                                 }
 284                         }
 285                 }
 286
 287                 if (array_key_exists('vid', $row) && is_null($row['vid']) && !empty($row['verb'])) {
 288                         $row['vid'] = Verb::getID($row['verb']);
 289                 }
 290
 291                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 292                         // Build the file string out of the term entries
 293                         if (array_key_exists('file', $row) && empty($row['file'])) {
 294                                 $row['file'] = Post\Category::getTextByURIId($row['internal-uri-id'], $row['internal-uid']);
 295                         }
 296                 }
 297
 298                 if ($row['internal-psid'] == RepPermissionSet::PUBLIC) {
 299                         if (array_key_exists('allow_cid', $row)) {
 300                                 $row['allow_cid'] = '';
 301                         }
 302                         if (array_key_exists('allow_gid', $row)) {
 303                                 $row['allow_gid'] = '';
 304                         }
 305                         if (array_key_exists('deny_cid', $row)) {
 306                                 $row['deny_cid'] = '';
 307                         }
 308                         if (array_key_exists('deny_gid', $row)) {
 309                                 $row['deny_gid'] = '';
 310                         }
 311                 }
 312
 313                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 314                         $row['ignored'] = $row['internal-user-ignored'];
 315                 }
 316
 317                 // Remove internal fields
 318                 unset($row['internal-network']);
 319                 unset($row['internal-uri-id']);
 320                 unset($row['internal-uid']);
 321                 unset($row['internal-psid']);
 322                 unset($row['internal-verb']);
 323                 unset($row['internal-user-ignored']);
 324                 unset($row['interaction']);
 325
 326                 return $row;
 327         }
 328
 329         /**
 330          * Fills an array with data from an item query
 331          *
 332          * @param object $stmt statement object
 333          * @param bool   $do_close
 334          * @return array Data array
 335          */
 336         public static function toArray($stmt, $do_close = true) {
 337                 if (is_bool($stmt)) {
 338                         return $stmt;
 339                 }
 340
 341                 $data = [];
 342                 while ($row = self::fetch($stmt)) {
 343                         $data[] = $row;
 344                 }
 345                 if ($do_close) {
 346                         DBA::close($stmt);
 347                 }
 348                 return $data;
 349         }
 350
 351         /**
 352          * Check if item data exists
 353          *
 354          * @param array $condition array of fields for condition
 355          *
 356          * @return boolean Are there rows for that condition?
 357          * @throws \Exception
 358          */
 359         public static function exists($condition) {
 360                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 361
 362                 if (is_bool($stmt)) {
 363                         $retval = $stmt;
 364                 } else {
 365                         $retval = (DBA::numRows($stmt) > 0);
 366                 }
 367
 368                 DBA::close($stmt);
 369
 370                 return $retval;
 371         }
 372
 373         /**
 374          * Select rows from the item table and returns them as an array
 375          *
 376          * @param array $selected  Array of selected fields, empty for all
 377          * @param array $condition Array of fields for condition
 378          * @param array $params    Array of several parameters
 379          *
 380          * @return array
 381          * @throws \Exception
 382          */
 383         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 384         {
 385                 $result = self::select($fields, $condition, $params);
 386
 387                 if (is_bool($result)) {
 388                         return [];
 389                 }
 390
 391                 $data = [];
 392                 while ($row = self::fetch($result)) {
 393                         $data[] = $row;
 394                 }
 395                 DBA::close($result);
 396
 397                 return $data;
 398         }
 399
 400         /**
 401          * Select rows from the item table
 402          *
 403          * @param array $selected  Array of selected fields, empty for all
 404          * @param array $condition Array of fields for condition
 405          * @param array $params    Array of several parameters
 406          *
 407          * @return boolean|object
 408          * @throws \Exception
 409          */
 410         public static function select(array $selected = [], array $condition = [], $params = [])
 411         {
 412                 $uid = 0;
 413                 $usermode = false;
 414
 415                 if (isset($params['uid'])) {
 416                         $uid = $params['uid'];
 417                         $usermode = true;
 418                 }
 419
 420                 $fields = self::fieldlist($usermode);
 421
 422                 $select_fields = self::constructSelectFields($fields, $selected);
 423
 424                 $condition_string = DBA::buildCondition($condition);
 425
 426                 $condition_string = self::addTablesToFields($condition_string, $fields);
 427
 428                 if ($usermode) {
 429                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 430                 }
 431
 432                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 433
 434                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 435
 436                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 437
 438                 return DBA::p($sql, $condition);
 439         }
 440
 441         /**
 442          * Select rows from the starting post in the item table
 443          *
 444          * @param integer $uid       User ID
 445          * @param array   $selected
 446          * @param array   $condition Array of fields for condition
 447          * @param array   $params    Array of several parameters
 448          *
 449          * @return boolean|object
 450          * @throws \Exception
 451          */
 452         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 453         {
 454                 $params['uid'] = $uid;
 455
 456                 if (empty($selected)) {
 457                         $selected = self::DISPLAY_FIELDLIST;
 458                 }
 459
 460                 return self::selectThread($selected, $condition, $params);
 461         }
 462
 463         /**
 464          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 465          *
 466          * @param integer $uid User ID
 467          * @param array   $selected
 468          * @param array   $condition
 469          * @param array   $params
 470          * @return bool|array
 471          * @throws \Exception
 472          * @see   DBA::select
 473          */
 474         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 475         {
 476                 $params['uid'] = $uid;
 477
 478                 if (empty($selected)) {
 479                         $selected = self::DISPLAY_FIELDLIST;
 480                 }
 481
 482                 return self::selectFirstThread($selected, $condition, $params);
 483         }
 484
 485         /**
 486          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 487          *
 488          * @param array $fields
 489          * @param array $condition
 490          * @param array $params
 491          * @return bool|array
 492          * @throws \Exception
 493          * @see   DBA::select
 494          */
 495         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 496         {
 497                 $params['limit'] = 1;
 498                 $result = self::selectThread($fields, $condition, $params);
 499
 500                 if (is_bool($result)) {
 501                         return $result;
 502                 } else {
 503                         $row = self::fetch($result);
 504                         DBA::close($result);
 505                         return $row;
 506                 }
 507         }
 508
 509         /**
 510          * Select rows from the starting post in the item table
 511          *
 512          * @param array $selected  Array of selected fields, empty for all
 513          * @param array $condition Array of fields for condition
 514          * @param array $params    Array of several parameters
 515          *
 516          * @return boolean|object
 517          * @throws \Exception
 518          */
 519         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 520         {
 521                 $uid = 0;
 522                 $usermode = false;
 523
 524                 if (isset($params['uid'])) {
 525                         $uid = $params['uid'];
 526                         $usermode = true;
 527                 }
 528
 529                 $fields = self::fieldlist($usermode);
 530
 531                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 532
 533                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 534                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 535                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 536                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 537
 538                 $select_fields = self::constructSelectFields($fields, $selected);
 539
 540                 $condition_string = DBA::buildCondition($condition);
 541
 542                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 543                 $condition_string = self::addTablesToFields($condition_string, $fields);
 544
 545                 if ($usermode) {
 546                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 547                 }
 548
 549                 $param_string = DBA::buildParameter($params);
 550                 $param_string = self::addTablesToFields($param_string, $threadfields);
 551                 $param_string = self::addTablesToFields($param_string, $fields);
 552
 553                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 554
 555                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 556
 557                 return DBA::p($sql, $condition);
 558         }
 559
 560         /**
 561          * Returns a list of fields that are associated with the item table
 562          *
 563          * @param $usermode
 564          * @return array field list
 565          */
 566         private static function fieldlist($usermode)
 567         {
 568                 $fields = [];
 569
 570                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 571                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid', 'causer-id',
 572                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 573                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 574                         'resource-id', 'event-id', 'post-type', 'file',
 575                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 576                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 577                         'id' => 'item_id', 'network', 'icid', 'event-id',
 578                         'uri-id' => 'internal-uri-id', 'uid' => 'internal-uid',
 579                         'network' => 'internal-network', 'psid' => 'internal-psid'];
 580
 581                 if ($usermode) {
 582                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 583                 }
 584
 585                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 586
 587                 $fields['post-delivery-data'] = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, Post\DeliveryData::FIELD_LIST);
 588
 589                 $fields['verb'] = ['name' => 'internal-verb'];
 590
 591                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 592
 593                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 594                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 595
 596                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 597                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 598
 599                 $fields['causer'] = ['url' => 'causer-link', 'name' => 'causer-name', 'addr' => 'causer-addr',
 600                         'thumb' => 'causer-avatar', 'nick' => 'causer-nick', 'network' => 'causer-network',
 601                         'contact-type' => 'causer-contact-type'];
 602
 603                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 604                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 605                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 606
 607                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network', 'author-id' => 'parent-author-id'];
 608
 609                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name',
 610                         'network' => 'parent-author-network'];
 611
 612                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 613                         'start' => 'event-start','finish' => 'event-finish',
 614                         'summary' => 'event-summary','desc' => 'event-desc',
 615                         'location' => 'event-location', 'type' => 'event-type',
 616                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 617                         'ignore' => 'event-ignore'];
 618
 619                 $fields['diaspora-interaction'] = ['interaction', 'interaction' => 'signed_text'];
 620
 621                 return $fields;
 622         }
 623
 624         /**
 625          * Returns SQL condition for the "select" functions
 626          *
 627          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 628          *
 629          * @return string SQL condition
 630          */
 631         private static function condition($thread_mode)
 632         {
 633                 if ($thread_mode) {
 634                         $master_table = "`thread`";
 635                 } else {
 636                         $master_table = "`item`";
 637                 }
 638                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 639                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 640                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 641                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 642                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 643                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 644                         GRAVITY_PARENT, GRAVITY_PARENT);
 645         }
 646
 647         /**
 648          * Returns all needed "JOIN" commands for the "select" functions
 649          *
 650          * @param integer $uid          User ID
 651          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 652          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 653          *
 654          * @param         $user_mode
 655          * @return string The SQL joins for the "select" functions
 656          */
 657         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 658         {
 659                 if ($thread_mode) {
 660                         $master_table = "`thread`";
 661                         $master_table_key = "`thread`.`iid`";
 662                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 663                 } else {
 664                         $master_table = "`item`";
 665                         $master_table_key = "`item`.`id`";
 666                         $joins = '';
 667                 }
 668
 669                 if ($user_mode) {
 670                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 671                                 AND NOT `contact`.`blocked`
 672                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 673                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 674                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 675                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 676                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 677                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 678                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 679                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 680                 } else {
 681                         if (strpos($sql_commands, "`contact`.") !== false) {
 682                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 683                         }
 684                         if (strpos($sql_commands, "`author`.") !== false) {
 685                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 686                         }
 687                         if (strpos($sql_commands, "`owner`.") !== false) {
 688                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 689                         }
 690                 }
 691                 if (strpos($sql_commands, "`causer`.") !== false) {
 692                         $joins .= " LEFT JOIN `contact` AS `causer` ON `causer`.`id` = `item`.`causer-id`";
 693                 }
 694
 695                 if (strpos($sql_commands, "`group_member`.") !== false) {
 696                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 697                 }
 698
 699                 if (strpos($sql_commands, "`user`.") !== false) {
 700                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 701                 }
 702
 703                 if (strpos($sql_commands, "`event`.") !== false) {
 704                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 705                 }
 706
 707                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 708                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 709                 }
 710
 711                 if (strpos($sql_commands, "`item-content`.") !== false) {
 712                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 713                 }
 714
 715                 if (strpos($sql_commands, "`post-delivery-data`.") !== false) {
 716                         $joins .= " LEFT JOIN `post-delivery-data` ON `post-delivery-data`.`uri-id` = `item`.`uri-id` AND `item`.`origin`";
 717                 }
 718
 719                 if (strpos($sql_commands, "`verb`.") !== false) {
 720                         $joins .= " LEFT JOIN `verb` ON `verb`.`id` = `item`.`vid`";
 721                 }
 722
 723                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 724                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 725                 }
 726
 727                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-item-author`.") !== false)) {
 728                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 729
 730                         if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 731                                 $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 732                         }
 733                 }
 734
 735                 return $joins;
 736         }
 737
 738         /**
 739          * Add the field list for the "select" functions
 740          *
 741          * @param array $fields The field definition array
 742          * @param array $selected The array with the selected fields from the "select" functions
 743          *
 744          * @return string The field list
 745          */
 746         private static function constructSelectFields(array $fields, array $selected)
 747         {
 748                 if (!empty($selected)) {
 749                         $selected = array_merge($selected, ['internal-uri-id', 'internal-uid', 'internal-psid', 'internal-network']);
 750                 }
 751
 752                 if (in_array('verb', $selected)) {
 753                         $selected = array_merge($selected, ['internal-verb']);
 754                 }
 755
 756                 if (in_array('ignored', $selected)) {
 757                         $selected[] = 'internal-user-ignored';
 758                 }
 759
 760                 $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 761
 762                 $selection = [];
 763                 foreach ($fields as $table => $table_fields) {
 764                         foreach ($table_fields as $field => $select) {
 765                                 if (empty($selected) || in_array($select, $selected)) {
 766                                         if (is_int($field)) {
 767                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 768                                         } else {
 769                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 770                                         }
 771                                 }
 772                         }
 773                 }
 774                 return implode(", ", $selection);
 775         }
 776
 777         /**
 778          * add table definition to fields in an SQL query
 779          *
 780          * @param string $query SQL query
 781          * @param array $fields The field definition array
 782          *
 783          * @return string the changed SQL query
 784          */
 785         private static function addTablesToFields($query, $fields)
 786         {
 787                 foreach ($fields as $table => $table_fields) {
 788                         foreach ($table_fields as $alias => $field) {
 789                                 if (is_int($alias)) {
 790                                         $replace_field = $field;
 791                                 } else {
 792                                         $replace_field = $alias;
 793                                 }
 794
 795                                 $search = "/([^\.])`" . $field . "`/i";
 796                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 797                                 $query = preg_replace($search, $replace, $query);
 798                         }
 799                 }
 800                 return $query;
 801         }
 802
 803         /**
 804          * Update existing item entries
 805          *
 806          * @param array $fields    The fields that are to be changed
 807          * @param array $condition The condition for finding the item entries
 808          *
 809          * In the future we may have to change permissions as well.
 810          * Then we had to add the user id as third parameter.
 811          *
 812          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 813          *
 814          * @return integer|boolean number of affected rows - or "false" if there was an error
 815          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 816          */
 817         public static function update(array $fields, array $condition)
 818         {
 819                 if (empty($condition) || empty($fields)) {
 820                         return false;
 821                 }
 822
 823                 $data_fields = $fields;
 824
 825                 // To ensure the data integrity we do it in an transaction
 826                 DBA::transaction();
 827
 828                 // We cannot simply expand the condition to check for origin entries
 829                 // The condition needn't to be a simple array but could be a complex condition.
 830                 // And we have to execute this query before the update to ensure to fetch the same data.
 831                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'icid', 'uid', 'file'], $condition);
 832
 833                 $content_fields = [];
 834                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 835                         if (isset($fields[$field])) {
 836                                 $content_fields[$field] = $fields[$field];
 837                                 if (in_array($field, self::CONTENT_FIELDLIST)) {
 838                                         unset($fields[$field]);
 839                                 } else {
 840                                         $fields[$field] = null;
 841                                 }
 842                         }
 843                 }
 844
 845                 $delivery_data = Post\DeliveryData::extractFields($fields);
 846
 847                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 848                 foreach ($clear_fields as $field) {
 849                         if (array_key_exists($field, $fields)) {
 850                                 $fields[$field] = null;
 851                         }
 852                 }
 853
 854                 if (array_key_exists('file', $fields)) {
 855                         $files = $fields['file'];
 856                         $fields['file'] = null;
 857                 } else {
 858                         $files = null;
 859                 }
 860
 861                 if (!empty($content_fields['verb'])) {
 862                         $fields['vid'] = Verb::getID($content_fields['verb']);
 863                 }
 864
 865                 if (!empty($fields)) {
 866                         $success = DBA::update('item', $fields, $condition);
 867
 868                         if (!$success) {
 869                                 DBA::close($items);
 870                                 DBA::rollback();
 871                                 return false;
 872                         }
 873                 }
 874
 875                 // When there is no content for the "old" item table, this will count the fetched items
 876                 $rows = DBA::affectedRows();
 877
 878                 $notify_items = [];
 879
 880                 while ($item = DBA::fetch($items)) {
 881                         Post\User::update($item['uri-id'], $item['uid'], $data_fields);
 882
 883                         if (empty($content_fields['verb']) || !in_array($content_fields['verb'], self::ACTIVITIES)) {
 884                                 if (!empty($content_fields['body'])) {
 885                                         $content_fields['raw-body'] = trim($content_fields['raw-body'] ?? $content_fields['body']);
 886
 887                                         // Remove all media attachments from the body and store them in the post-media table
 888                                         $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 889                                         $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 890                                 }
 891
 892                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 893
 894                                 if (empty($item['icid'])) {
 895                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 896                                         if (DBA::isResult($item_content)) {
 897                                                 $item_fields = ['icid' => $item_content['id']];
 898                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 899                                         }
 900                                 }
 901                         }
 902
 903                         if (!is_null($files)) {
 904                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $files);
 905                                 if (!empty($item['file'])) {
 906                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
 907                                 }
 908                         }
 909
 910                         if (!empty($fields['attach'])) {
 911                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 912                         }
 913
 914                         Post\DeliveryData::update($item['uri-id'], $delivery_data);
 915
 916                         self::updateThread($item['id']);
 917
 918                         // We only need to notfiy others when it is an original entry from us.
 919                         // Only call the notifier when the item has some content relevant change.
 920                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 921                                 $notify_items[] = $item['id'];
 922                         }
 923                 }
 924
 925                 DBA::close($items);
 926                 DBA::commit();
 927
 928                 foreach ($notify_items as $notify_item) {
 929                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
 930                 }
 931
 932                 return $rows;
 933         }
 934
 935         /**
 936          * Delete an item and notify others about it - if it was ours
 937          *
 938          * @param array   $condition The condition for finding the item entries
 939          * @param integer $priority  Priority for the notification
 940          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 941          */
 942         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 943         {
 944                 $items = Post::select(['id'], $condition);
 945                 while ($item = Post::fetch($items)) {
 946                         self::markForDeletionById($item['id'], $priority);
 947                 }
 948                 DBA::close($items);
 949         }
 950
 951         /**
 952          * Delete an item for an user and notify others about it - if it was ours
 953          *
 954          * @param array   $condition The condition for finding the item entries
 955          * @param integer $uid       User who wants to delete this item
 956          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 957          */
 958         public static function deleteForUser($condition, $uid)
 959         {
 960                 if ($uid == 0) {
 961                         return;
 962                 }
 963
 964                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 965                 while ($item = Post::fetch($items)) {
 966                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 967
 968                         // "Deleting" global items just means hiding them
 969                         if ($item['uid'] == 0) {
 970                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 971                         } elseif ($item['uid'] == $uid) {
 972                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 973                         } else {
 974                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
 975                         }
 976                 }
 977                 DBA::close($items);
 978         }
 979
 980         /**
 981          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 982          *
 983          * @param integer $item_id
 984          * @param integer $priority Priority for the notification
 985          *
 986          * @return boolean success
 987          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 988          */
 989         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 990         {
 991                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 992                 // locate item to be deleted
 993                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri', 'origin',
 994                         'deleted', 'file', 'resource-id', 'event-id',
 995                         'verb', 'object-type', 'object', 'target', 'contact-id',
 996                         'icid', 'psid', 'gravity'];
 997                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 998                 if (!DBA::isResult($item)) {
 999                         Logger::info('Item not found.', ['id' => $item_id]);
1000                         return false;
1001                 }
1002
1003                 if ($item['deleted']) {
1004                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1005                         return false;
1006                 }
1007
1008                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
1009                 if (!DBA::isResult($parent)) {
1010                         $parent = ['origin' => false];
1011                 }
1012
1013                 // clean up categories and tags so they don't end up as orphans
1014
1015                 $matches = [];
1016                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1017
1018                 if ($cnt) {
1019                         foreach ($matches as $mtch) {
1020                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1021                         }
1022                 }
1023
1024                 $matches = [];
1025
1026                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1027
1028                 if ($cnt) {
1029                         foreach ($matches as $mtch) {
1030                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1031                         }
1032                 }
1033
1034                 /*
1035                  * If item is a link to a photo resource, nuke all the associated photos
1036                  * (visitors will not have photo resources)
1037                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1038                  * generate a resource-id and therefore aren't intimately linked to the item.
1039                  */
1040                 /// @TODO: this should first check if photo is used elsewhere
1041                 if (strlen($item['resource-id'])) {
1042                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1043                 }
1044
1045                 // If item is a link to an event, delete the event.
1046                 if (intval($item['event-id'])) {
1047                         Event::delete($item['event-id']);
1048                 }
1049
1050                 // If item has attachments, drop them
1051                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
1052                 foreach($attachments as $attachment) {
1053                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
1054                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1055                         }
1056                 }
1057
1058                 // Set the item to "deleted"
1059                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1060                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1061
1062                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
1063                 self::deleteThread($item['id'], $item['parent-uri']);
1064
1065                 if (!Post::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1066                         self::markForDeletion(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1067                 }
1068
1069                 Post\DeliveryData::delete($item['uri-id']);
1070
1071                 // When the permission set will be used in photo and events as well,
1072                 // this query here needs to be extended.
1073                 // @todo Currently deactivated. We need the permission set in the deletion process.
1074                 // This is a reminder to add the removal somewhere else.
1075                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1076                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1077                 //}
1078
1079                 // If it's the parent of a comment thread, kill all the kids
1080                 if ($item['gravity'] == GRAVITY_PARENT) {
1081                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1082                 }
1083
1084                 // Is it our comment and/or our thread?
1085                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
1086                         // When we delete the original post we will delete all existing copies on the server as well
1087                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1088
1089                         // send the notification upstream/downstream
1090                         if ($priority) {
1091                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1092                         }
1093                 } elseif ($item['uid'] != 0) {
1094                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
1095
1096                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1097                         $global_item = Post::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1098                         if (DBA::isResult($global_item)) {
1099                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1100                         }
1101                 }
1102
1103                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1104
1105                 return true;
1106         }
1107
1108
1109         private static function guid($item, $notify)
1110         {
1111                 if (!empty($item['guid'])) {
1112                         return Strings::escapeTags(trim($item['guid']));
1113                 }
1114
1115                 if ($notify) {
1116                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1117                         // We add the hash of our own host because our host is the original creator of the post.
1118                         $prefix_host = DI::baseUrl()->getHostname();
1119                 } else {
1120                         $prefix_host = '';
1121
1122                         // We are only storing the post so we create a GUID from the original hostname.
1123                         if (!empty($item['author-link'])) {
1124                                 $parsed = parse_url($item['author-link']);
1125                                 if (!empty($parsed['host'])) {
1126                                         $prefix_host = $parsed['host'];
1127                                 }
1128                         }
1129
1130                         if (empty($prefix_host) && !empty($item['plink'])) {
1131                                 $parsed = parse_url($item['plink']);
1132                                 if (!empty($parsed['host'])) {
1133                                         $prefix_host = $parsed['host'];
1134                                 }
1135                         }
1136
1137                         if (empty($prefix_host) && !empty($item['uri'])) {
1138                                 $parsed = parse_url($item['uri']);
1139                                 if (!empty($parsed['host'])) {
1140                                         $prefix_host = $parsed['host'];
1141                                 }
1142                         }
1143
1144                         // Is it in the format data@host.tld? - Used for mail contacts
1145                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1146                                 $mailparts = explode('@', $item['author-link']);
1147                                 $prefix_host = array_pop($mailparts);
1148                         }
1149                 }
1150
1151                 if (!empty($item['plink'])) {
1152                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1153                 } elseif (!empty($item['uri'])) {
1154                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1155                 } else {
1156                         $guid = System::createUUID(hash('crc32', $prefix_host));
1157                 }
1158
1159                 return $guid;
1160         }
1161
1162         private static function contactId($item)
1163         {
1164                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1165                         return $item['contact-id'];
1166                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1167                         return $item['contact-id'];
1168                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1169                         return $item['author-id'];
1170                 } elseif (!empty($item['contact-id'])) {
1171                         return $item['contact-id'];
1172                 } else {
1173                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1174                         if (!empty($contact_id)) {
1175                                 return $contact_id;
1176                         }
1177                 }
1178                 return $item['author-id'];
1179         }
1180
1181         // This function will finally cover most of the preparation functionality in mod/item.php
1182         public static function prepare(&$item)
1183         {
1184                 /*
1185                  * @TODO: Unused code triggering inspection errors
1186                  *
1187                 $data = BBCode::getAttachmentData($item['body']);
1188                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1189                         && ($posttype != self::PT_PERSONAL_NOTE)) {
1190                         $posttype = self::PT_PAGE;
1191                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1192                 }
1193                  */
1194         }
1195
1196         /**
1197          * Write an item array into a spool file to be inserted later.
1198          * This command is called whenever there are issues storing an item.
1199          *
1200          * @param array $item The item fields that are to be inserted
1201          * @throws \Exception
1202          */
1203         private static function spool($orig_item)
1204         {
1205                 // Now we store the data in the spool directory
1206                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1207                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1208
1209                 $spoolpath = get_spoolpath();
1210                 if ($spoolpath != "") {
1211                         $spool = $spoolpath . '/' . $file;
1212
1213                         file_put_contents($spool, json_encode($orig_item));
1214                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1215                 }
1216         }
1217
1218         /**
1219          * Check if the item array is a duplicate
1220          *
1221          * @param array $item
1222          * @return boolean is it a duplicate?
1223          */
1224         private static function isDuplicate(array $item)
1225         {
1226                 // Checking if there is already an item with the same guid
1227                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1228                 if (Post::exists($condition)) {
1229                         Logger::notice('Found already existing item', [
1230                                 'guid' => $item['guid'],
1231                                 'uid' => $item['uid'],
1232                                 'network' => $item['network']
1233                         ]);
1234                         return true;
1235                 }
1236
1237                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1238                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1239                 if (Post::exists($condition)) {
1240                         Logger::notice('duplicated item with the same uri found.', $item);
1241                         return true;
1242                 }
1243
1244                 // On Friendica and Diaspora the GUID is unique
1245                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1246                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1247                         if (Post::exists($condition)) {
1248                                 Logger::notice('duplicated item with the same guid found.', $item);
1249                                 return true;
1250                         }
1251                 } elseif ($item['network'] == Protocol::OSTATUS) {
1252                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1253                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1254                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1255                         if (Post::exists($condition)) {
1256                                 Logger::notice('duplicated item with the same body found.', $item);
1257                                 return true;
1258                         }
1259                 }
1260
1261                 /*
1262                  * Check for already added items.
1263                  * There is a timing issue here that sometimes creates double postings.
1264                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1265                  */
1266                 if (($item['uid'] == 0) && Post::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1267                         Logger::notice('Global item already stored.', ['uri' => $item['uri'], 'network' => $item['network']]);
1268                         return true;
1269                 }
1270
1271                 return false;
1272         }
1273
1274         /**
1275          * Check if the item array is valid
1276          *
1277          * @param array $item
1278          * @return boolean item is valid
1279          */
1280         public static function isValid(array $item)
1281         {
1282                 // When there is no content then we don't post it
1283                 if ($item['body'] . $item['title'] == '') {
1284                         Logger::notice('No body, no title.');
1285                         return false;
1286                 }
1287
1288                 if (!empty($item['uid'])) {
1289                         $owner = User::getOwnerDataById($item['uid'], false);
1290                         if (!$owner) {
1291                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
1292                                 return false;
1293                         }
1294
1295                         if ($owner['account_expired'] || $owner['account_removed']) {
1296                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
1297                                 return false;
1298                         }
1299                 }
1300
1301                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
1302                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1303                         return false;
1304                 }
1305
1306                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1307                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1308                         return false;
1309                 }
1310
1311                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
1312                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1313                         return false;
1314                 }
1315
1316                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1317                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1318                         return false;
1319                 }
1320
1321                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
1322                         return false;
1323                 }
1324
1325                 if ($item['verb'] == Activity::FOLLOW) {
1326                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
1327                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1328                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
1329                                 return false;
1330                         }
1331
1332                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1333                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1334                         if (Post::exists($condition)) {
1335                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1336                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
1337                                 return false;
1338                         }
1339                 }
1340
1341                 return true;
1342         }
1343
1344         /**
1345          * Check if the item array is too old
1346          *
1347          * @param array $item
1348          * @return boolean item is too old
1349          */
1350         public static function isTooOld(array $item)
1351         {
1352                 // check for create date and expire time
1353                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1354
1355                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
1356                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1357                         $expire_interval = $user['expire'];
1358                 }
1359
1360                 if (($expire_interval > 0) && !empty($item['created'])) {
1361                         $expire_date = time() - ($expire_interval * 86400);
1362                         $created_date = strtotime($item['created']);
1363                         if ($created_date < $expire_date) {
1364                                 Logger::notice('Item created before expiration interval.', [
1365                                         'created' => date('c', $created_date),
1366                                         'expired' => date('c', $expire_date),
1367                                         '$item' => $item
1368                                 ]);
1369                                 return true;
1370                         }
1371                 }
1372
1373                 return false;
1374         }
1375
1376         /**
1377          * Return the id of the given item array if it has been stored before
1378          *
1379          * @param array $item
1380          * @return integer item id
1381          */
1382         private static function getDuplicateID(array $item)
1383         {
1384                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1385                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1386                                 trim($item['uri']), $item['uid'],
1387                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1388                         $existing = Post::selectFirst(['id', 'network'], $condition);
1389                         if (DBA::isResult($existing)) {
1390                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1391                                 if ($item['uid'] != 0) {
1392                                         Logger::notice('Item already existed for user', [
1393                                                 'uri' => $item['uri'],
1394                                                 'uid' => $item['uid'],
1395                                                 'network' => $item['network'],
1396                                                 'existing_id' => $existing["id"],
1397                                                 'existing_network' => $existing["network"]
1398                                         ]);
1399                                 }
1400
1401                                 return $existing["id"];
1402                         }
1403                 }
1404                 return 0;
1405         }
1406
1407         /**
1408          * Fetch top-level parent data for the given item array
1409          *
1410          * @param array $item
1411          * @return array item array with parent data
1412          * @throws \Exception
1413          */
1414         private static function getTopLevelParent(array $item)
1415         {
1416                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
1417                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1418                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1419                 $condition = ['uri' => $item['thr-parent'], 'uid' => $item['uid']];
1420                 $params = ['order' => ['id' => false]];
1421                 $parent = Post::selectFirst($fields, $condition, $params);
1422
1423                 if (!DBA::isResult($parent)) {
1424                         Logger::notice('item parent was not found - ignoring item', ['thr-parent' => $item['thr-parent'], 'uid' => $item['uid']]);
1425                         return [];
1426                 }
1427
1428                 if ($parent['uri'] == $parent['parent-uri']) {
1429                         return $parent;
1430                 }
1431
1432                 $condition = ['uri' => $parent['parent-uri'],
1433                         'parent-uri' => $parent['parent-uri'],
1434                         'uid' => $parent['uid']];
1435                 $params = ['order' => ['id' => false]];
1436                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
1437                 if (!DBA::isResult($toplevel_parent)) {
1438                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri' => $parent['parent-uri'], 'uid' => $parent['uid']]);
1439                         return [];
1440                 }
1441
1442                 return $toplevel_parent;
1443         }
1444
1445         /**
1446          * Get the gravity for the given item array
1447          *
1448          * @param array $item
1449          * @return integer gravity
1450          */
1451         private static function getGravity(array $item)
1452         {
1453                 $activity = DI::activity();
1454
1455                 if (isset($item['gravity'])) {
1456                         return intval($item['gravity']);
1457                 } elseif ($item['parent-uri'] === $item['uri']) {
1458                         return GRAVITY_PARENT;
1459                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1460                         return GRAVITY_COMMENT;
1461                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1462                         return GRAVITY_ACTIVITY;
1463                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
1464                         return GRAVITY_ACTIVITY;
1465                 }
1466                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
1467                 return GRAVITY_UNKNOWN;   // Should not happen
1468         }
1469
1470         public static function insert($item, $notify = false, $dontcache = false)
1471         {
1472                 $structure = self::getItemFields();
1473
1474                 $orig_item = $item;
1475
1476                 $priority = PRIORITY_HIGH;
1477
1478                 // If it is a posting where users should get notifications, then define it as wall posting
1479                 if ($notify) {
1480                         $item['wall'] = 1;
1481                         $item['origin'] = 1;
1482                         $item['network'] = Protocol::DFRN;
1483                         $item['protocol'] = Conversation::PARCEL_DIRECT;
1484                         $item['direction'] = Conversation::PUSH;
1485
1486                         if (in_array($notify, PRIORITIES)) {
1487                                 $priority = $notify;
1488                         }
1489                 } else {
1490                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1491                 }
1492
1493                 $uid = intval($item['uid']);
1494
1495                 $item['guid'] = self::guid($item, $notify);
1496                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
1497
1498                 // Store URI data
1499                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1500
1501                 // Backward compatibility: parent-uri used to be the direct parent uri.
1502                 // If it is provided without a thr-parent, it probably is the old behavior.
1503                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
1504                 $item['parent-uri'] = $item['thr-parent'];
1505
1506                 // Store conversation data
1507                 $item = Conversation::insert($item);
1508
1509                 /*
1510                  * Do we already have this item?
1511                  * We have to check several networks since Friendica posts could be repeated
1512                  * via OStatus (maybe Diasporsa as well)
1513                  */
1514                 $duplicate = self::getDuplicateID($item);
1515                 if ($duplicate) {
1516                         return $duplicate;
1517                 }
1518
1519                 // Additional duplicate checks
1520                 /// @todo Check why the first duplication check returns the item number and the second a 0
1521                 if (self::isDuplicate($item)) {
1522                         return 0;
1523                 }
1524
1525                 $item['wall']          = intval($item['wall'] ?? 0);
1526                 $item['extid']         = trim($item['extid'] ?? '');
1527                 $item['author-name']   = trim($item['author-name'] ?? '');
1528                 $item['author-link']   = trim($item['author-link'] ?? '');
1529                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1530                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1531                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1532                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1533                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1534                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1535                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1536                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1537                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1538                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
1539                 $item['location']      = trim($item['location'] ?? '');
1540                 $item['coord']         = trim($item['coord'] ?? '');
1541                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1542                 $item['deleted']       = 0;
1543                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1544                 $item['verb']          = trim($item['verb'] ?? '');
1545                 $item['object-type']   = trim($item['object-type'] ?? '');
1546                 $item['object']        = trim($item['object'] ?? '');
1547                 $item['target-type']   = trim($item['target-type'] ?? '');
1548                 $item['target']        = trim($item['target'] ?? '');
1549                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
1550                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1551                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1552                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1553                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1554                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1555                 $item['body']          = trim($item['body'] ?? '');
1556                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
1557                 $item['app']           = trim($item['app'] ?? '');
1558                 $item['origin']        = intval($item['origin'] ?? 0);
1559                 $item['postopts']      = trim($item['postopts'] ?? '');
1560                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1561                 $item['event-id']      = intval($item['event-id'] ?? 0);
1562                 $item['inform']        = trim($item['inform'] ?? '');
1563                 $item['file']          = trim($item['file'] ?? '');
1564
1565                 // Items cannot be stored before they happen ...
1566                 if ($item['created'] > DateTimeFormat::utcNow()) {
1567                         $item['created'] = DateTimeFormat::utcNow();
1568                 }
1569
1570                 // We haven't invented time travel by now.
1571                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1572                         $item['edited'] = DateTimeFormat::utcNow();
1573                 }
1574
1575                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1576
1577                 $item['gravity'] = self::getGravity($item);
1578
1579                 $item['language'] = self::getLanguage($item);
1580
1581                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1582                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1583                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
1584
1585                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1586                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1587                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1588
1589                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1590                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1591                         $item['post-type'] = self::PT_FOLLOWER;
1592                 }
1593
1594                 // Ensure that there is an avatar cache
1595                 Contact::checkAvatarCache($item['author-id']);
1596                 Contact::checkAvatarCache($item['owner-id']);
1597
1598                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1599                 $item["contact-id"] = self::contactId($item);
1600
1601                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
1602                         self::isTooOld($item)) {
1603                         Logger::info('Item is too old', ['item' => $item]);
1604                         return 0;
1605                 }
1606
1607                 if (!self::isValid($item)) {
1608                         return 0;
1609                 }
1610
1611                 if ($item['gravity'] !== GRAVITY_PARENT) {
1612                         $toplevel_parent = self::getTopLevelParent($item);
1613                         if (empty($toplevel_parent)) {
1614                                 return 0;
1615                         }
1616
1617                         // If the thread originated from this node, we check the permission against the thread starter
1618                         $condition = ['uri' => $toplevel_parent['uri'], 'wall' => true];
1619                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
1620                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
1621                                 return 0;
1622                         }
1623
1624                         $parent_id          = $toplevel_parent['id'];
1625                         $item['parent-uri'] = $toplevel_parent['uri'];
1626                         $item['deleted']    = $toplevel_parent['deleted'];
1627                         $item['allow_cid']  = $toplevel_parent['allow_cid'];
1628                         $item['allow_gid']  = $toplevel_parent['allow_gid'];
1629                         $item['deny_cid']   = $toplevel_parent['deny_cid'];
1630                         $item['deny_gid']   = $toplevel_parent['deny_gid'];
1631                         $parent_origin      = $toplevel_parent['origin'];
1632
1633                         // Don't federate received participation messages
1634                         if ($item['verb'] != Activity::FOLLOW) {
1635                                 $item['wall'] = $toplevel_parent['wall'];
1636                         } else {
1637                                 $item['wall'] = false;
1638                         }
1639
1640                         /*
1641                          * If the parent is private, force privacy for the entire conversation
1642                          * This differs from the above settings as it subtly allows comments from
1643                          * email correspondents to be private even if the overall thread is not.
1644                          */
1645                         if ($toplevel_parent['private']) {
1646                                 $item['private'] = $toplevel_parent['private'];
1647                         }
1648
1649                         /*
1650                          * Edge case. We host a public forum that was originally posted to privately.
1651                          * The original author commented, but as this is a comment, the permissions
1652                          * weren't fixed up so it will still show the comment as private unless we fix it here.
1653                          */
1654                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
1655                                 $item['private'] = self::PUBLIC;
1656                         }
1657
1658                         // If its a post that originated here then tag the thread as "mention"
1659                         if ($item['origin'] && $item['uid']) {
1660                                 DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1661                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'uid' => $item['uid']]);
1662                         }
1663
1664                         // Update the contact relations
1665                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1666
1667                         unset($item['parent_origin']);
1668                 } else {
1669                         $parent_id = 0;
1670                         $parent_origin = $item['origin'];
1671                 }
1672
1673                 // We don't store the causer link, only the id
1674                 unset($item['causer-link']);
1675
1676                 // We don't store these fields anymore in the item table
1677                 unset($item['author-link']);
1678                 unset($item['author-name']);
1679                 unset($item['author-avatar']);
1680                 unset($item['author-network']);
1681
1682                 unset($item['owner-link']);
1683                 unset($item['owner-name']);
1684                 unset($item['owner-avatar']);
1685
1686                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1687                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1688
1689                 // Is this item available in the global items (with uid=0)?
1690                 if ($item["uid"] == 0) {
1691                         $item["global"] = true;
1692
1693                         // Set the global flag on all items if this was a global item entry
1694                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1695                 } else {
1696                         $item["global"] = Post::exists(['uid' => 0, 'uri' => $item["uri"]]);
1697                 }
1698
1699                 // ACL settings
1700                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
1701                         $item["private"] = self::PRIVATE;
1702                 }
1703
1704                 if ($notify) {
1705                         $item['edit'] = false;
1706                         $item['parent'] = $parent_id;
1707                         Hook::callAll('post_local', $item);
1708                         unset($item['edit']);
1709                 } else {
1710                         Hook::callAll('post_remote', $item);
1711                 }
1712
1713                 // Set after the insert because top-level posts are self-referencing
1714                 unset($item['parent']);
1715
1716                 if (!empty($item['cancel'])) {
1717                         Logger::log('post cancelled by addon.');
1718                         return 0;
1719                 }
1720
1721                 if (empty($item['vid']) && !empty($item['verb'])) {
1722                         $item['vid'] = Verb::getID($item['verb']);
1723                 }
1724
1725                 // Creates or assigns the permission set
1726                 $item['psid'] = PermissionSet::getIdFromACL(
1727                         $item['uid'],
1728                         $item['allow_cid'],
1729                         $item['allow_gid'],
1730                         $item['deny_cid'],
1731                         $item['deny_gid']
1732                 );
1733
1734                 unset($item['allow_cid']);
1735                 unset($item['allow_gid']);
1736                 unset($item['deny_cid']);
1737                 unset($item['deny_gid']);
1738
1739                 // This array field is used to trigger some automatic reactions
1740                 // It is mainly used in the "post_local" hook.
1741                 unset($item['api_source']);
1742
1743                 if ($item['verb'] == Activity::ANNOUNCE) {
1744                         self::setOwnerforResharedItem($item);
1745                 }
1746
1747                 // Remove all media attachments from the body and store them in the post-media table
1748                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1749                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1750
1751                 // Check for hashtags in the body and repair or add hashtag links
1752                 $item['body'] = self::setHashtags($item['body']);
1753
1754                 if (!empty($item['attach'])) {
1755                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1756                 }
1757
1758                 // Fill the cache field
1759                 self::putInCache($item);
1760
1761                 if (stristr($item['verb'], Activity::POKE)) {
1762                         $notify_type = Delivery::POKE;
1763                 } else {
1764                         $notify_type = Delivery::POST;
1765                 }
1766
1767                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1768                         $item['icid'] = self::insertContent($item);
1769                         if (empty($item['icid'])) {
1770                                 // This shouldn't happen
1771                                 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']]);
1772                                 return 0;
1773                         }
1774                 }
1775
1776                 $body = $item['body'];
1777                 $verb = $item['verb'];
1778
1779                 // We just remove everything that is content
1780                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1781                         unset($item[$field]);
1782                 }
1783
1784                 unset($item['activity']);
1785
1786                 // Filling item related side tables
1787
1788                 // Diaspora signature
1789                 if (!empty($item['diaspora_signed_text'])) {
1790                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1791                 }
1792
1793                 unset($item['diaspora_signed_text']);
1794
1795                 // Attached file links
1796                 if (!empty($item['file'])) {
1797                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1798                 }
1799
1800                 unset($item['file']);
1801
1802                 // Delivery relevant data
1803                 $delivery_data = Post\DeliveryData::extractFields($item);
1804                 unset($item['postopts']);
1805                 unset($item['inform']);
1806
1807                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1808                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1809                 }
1810
1811                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1812                 if (!Tag::existsForPost($item['uri-id'])) {
1813                         Tag::storeFromBody($item['uri-id'], $body);
1814                 }
1815
1816                 if (Post\User::insert($item['uri-id'], $item['uid'], $item)) {
1817                         // Remove all fields that aren't part of the item table
1818                         foreach ($item as $field => $value) {
1819                                 if (!in_array($field, $structure['item'])) {
1820                                         unset($item[$field]);
1821                                 }
1822                         }
1823
1824                         $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'network' => $item['network']];
1825                         if (DBA::exists('item', $condition)) {
1826                                 Logger::notice('Item is already inserted - aborting', $condition);
1827                                 return 0;
1828                         }
1829
1830                         $result = DBA::insert('item', $item);
1831
1832                         // When the item was successfully stored we fetch the ID of the item.
1833                         $current_post = DBA::lastInsertId();
1834                 } else {
1835                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1836                         return 0;
1837                 }
1838
1839                 if (empty($current_post) || !DBA::isResult($result)) {
1840                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1841                         Logger::warning('Could not store item. it will be spooled', ['result' => $result, 'id' => $current_post]);
1842                         self::spool($orig_item);
1843                         return 0;
1844                 }
1845
1846                 Logger::notice('created item', ['id' => $current_post, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1847
1848                 if (!$parent_id || ($item['gravity'] === GRAVITY_PARENT)) {
1849                         $parent_id = $current_post;
1850                 }
1851
1852                 // Set parent id
1853                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1854
1855                 $item['id'] = $current_post;
1856                 $item['parent'] = $parent_id;
1857
1858                 // update the commented timestamp on the parent
1859                 if (DI::config()->get('system', 'like_no_comment')) {
1860                         // Update when it is a comment
1861                         $update_commented = in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1862                 } else {
1863                         // Update when it isn't a follow or tag verb
1864                         $update_commented = !in_array($verb, [Activity::FOLLOW, Activity::TAG]);
1865                 }
1866
1867                 if ($update_commented) {
1868                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1869                 } else {
1870                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1871                 }
1872
1873                 if ($item['gravity'] === GRAVITY_PARENT) {
1874                         self::addThread($current_post);
1875                 } else {
1876                         self::updateThread($parent_id);
1877                 }
1878
1879                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1880                 if (self::tagDeliver($item['uid'], $current_post)) {
1881                         // Get the user information for the logging
1882                         $user = User::getById($uid);
1883
1884                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1885                         return 0;
1886                 }
1887
1888                 if (!$dontcache) {
1889                         $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1890                         if (DBA::isResult($posted_item)) {
1891                                 if ($notify) {
1892                                         Hook::callAll('post_local_end', $posted_item);
1893                                 } else {
1894                                         Hook::callAll('post_remote_end', $posted_item);
1895                                 }
1896                         } else {
1897                                 Logger::log('new item not found in DB, id ' . $current_post);
1898                         }
1899                 }
1900
1901                 if ($item['gravity'] === GRAVITY_PARENT) {
1902                         self::addShadow($current_post);
1903                 } else {
1904                         self::addShadowPost($current_post);
1905                 }
1906
1907                 self::updateContact($item);
1908
1909                 UserItem::setNotification($current_post);
1910
1911                 check_user_notification($current_post);
1912
1913                 // Distribute items to users who subscribed to their tags
1914                 self::distributeByTags($item);
1915
1916                 // Automatically reshare the item if the "remote_self" option is selected
1917                 self::autoReshare($item);
1918
1919                 $transmit = $notify || ($item['visible'] && ($parent_origin || $item['origin']));
1920
1921                 if ($transmit) {
1922                         $transmit_item = Post::selectFirst(['verb', 'origin'], ['id' => $item['id']]);
1923                         // Don't relay participation messages
1924                         if (($transmit_item['verb'] == Activity::FOLLOW) &&
1925                                 (!$transmit_item['origin'] || ($item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1926                                 Logger::info('Participation messages will not be relayed', ['item' => $item['id'], 'uri' => $item['uri'], 'verb' => $transmit_item['verb']]);
1927                                 $transmit = false;
1928                         }
1929                 }
1930
1931                 if ($transmit) {
1932                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
1933                 }
1934
1935                 return $current_post;
1936         }
1937
1938         /**
1939          * Change the owner of a parent item if it had been shared by a forum
1940          *
1941          * (public) forum posts in the new format consist of the regular post by the author
1942          * followed by an announce message sent from the forum account.
1943          * Changing the owner helps in grouping forum posts.
1944          *
1945          * @param array $item
1946          * @return void
1947          */
1948         private static function setOwnerforResharedItem(array $item)
1949         {
1950                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-type'],
1951                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1952                 if (!DBA::isResult($parent)) {
1953                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1954                         return;
1955                 }
1956
1957                 $author = Contact::selectFirst(['url', 'contact-type'], ['id' => $item['author-id']]);
1958                 if (!DBA::isResult($author)) {
1959                         Logger::error('Author not found', ['id' => $item['author-id']]);
1960                         return;
1961                 }
1962
1963                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1964                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1965                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid']]);
1966                         return;
1967                 }
1968
1969                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1970                         if ($parent['post-type'] == self::PT_ANNOUNCEMENT) {
1971                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1972                                 return;
1973                         }
1974
1975                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1976                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1977                                 return;
1978                         }
1979                         self::update(['post-type' => self::PT_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1980                         Logger::info('Set announcement post-type', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1981                         return;
1982                 }
1983
1984                 self::update(['owner-id' => $item['author-id'], 'contact-id' => $cid], ['id' => $parent['id']]);
1985                 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]);
1986         }
1987
1988         /**
1989          * Distribute the given item to users who subscribed to their tags
1990          *
1991          * @param array $item     Processed item
1992          */
1993         private static function distributeByTags(array $item)
1994         {
1995                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1996                         return;
1997                 }
1998
1999                 $uids = Tag::getUIDListByURIId($item['uri-id']);
2000                 foreach ($uids as $uid) {
2001                         if (Contact::isSharing($item['author-id'], $uid)) {
2002                                 $fields = [];
2003                         } else {
2004                                 $fields = ['post-type' => self::PT_TAG];
2005                         }
2006
2007                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
2008                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
2009                 }
2010         }
2011
2012         /**
2013          * Insert a new item content entry
2014          *
2015          * @param array $item The item fields that are to be inserted
2016          * @throws \Exception
2017          */
2018         private static function insertContent(array $item)
2019         {
2020                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2021
2022                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2023                         if (isset($item[$field])) {
2024                                 $fields[$field] = $item[$field];
2025                         }
2026                 }
2027
2028                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2029                 if (DBA::isResult($item_content)) {
2030                         $icid = $item_content['id'];
2031                         Logger::info('Existing content found', ['icid' => $icid, 'uri' => $item['uri']]);
2032                         return $icid;
2033                 }
2034
2035                 DBA::replace('item-content', $fields);
2036
2037                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2038                 if (DBA::isResult($item_content)) {
2039                         $icid = $item_content['id'];
2040                         Logger::notice('Content inserted', ['icid' => $icid, 'uri' => $item['uri']]);
2041                         return $icid;
2042                 }
2043
2044                 // This shouldn't happen.
2045                 Logger::error("Content wasn't inserted", $item);
2046                 return null;
2047         }
2048
2049         /**
2050          * Update existing item content entries
2051          *
2052          * @param array $item      The item fields that are to be changed
2053          * @param array $condition The condition for finding the item content entries
2054          * @throws \Exception
2055          */
2056         private static function updateContent($item, $condition)
2057         {
2058                 // We have to select only the fields from the "item-content" table
2059                 $fields = [];
2060                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2061                         if (isset($item[$field])) {
2062                                 $fields[$field] = $item[$field];
2063                         }
2064                 }
2065
2066                 if (empty($fields)) {
2067                         return;
2068                 }
2069
2070                 DBA::update('item-content', $fields, $condition, true);
2071                 Logger::info('Updated content', ['condition' => $condition]);
2072         }
2073
2074         /**
2075          * Distributes public items to the receivers
2076          *
2077          * @param integer $itemid      Item ID that should be added
2078          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2079          * @throws \Exception
2080          */
2081         public static function distribute($itemid, $signed_text = '')
2082         {
2083                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2084                 $parent = Post::selectFirst(['owner-id'], $condition);
2085                 if (!DBA::isResult($parent)) {
2086                         return;
2087                 }
2088
2089                 // Only distribute public items from native networks
2090                 $condition = ['id' => $itemid, 'uid' => 0,
2091                         'network' => array_merge(Protocol::FEDERATED ,['']),
2092                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2093                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
2094                 if (!DBA::isResult($item)) {
2095                         return;
2096                 }
2097
2098                 $origin = $item['origin'];
2099
2100                 $users = [];
2101
2102                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2103                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2104                 if (!DBA::isResult($owner)) {
2105                         return;
2106                 }
2107
2108                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2109                 $contacts = DBA::select('contact', ['uid'], $condition);
2110                 while ($contact = DBA::fetch($contacts)) {
2111                         if ($contact['uid'] == 0) {
2112                                 continue;
2113                         }
2114
2115                         $users[$contact['uid']] = $contact['uid'];
2116                 }
2117                 DBA::close($contacts);
2118
2119                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2120                 $contacts = DBA::select('contact', ['uid'], $condition);
2121                 while ($contact = DBA::fetch($contacts)) {
2122                         if ($contact['uid'] == 0) {
2123                                 continue;
2124                         }
2125
2126                         $users[$contact['uid']] = $contact['uid'];
2127                 }
2128                 DBA::close($contacts);
2129
2130                 if (!empty($owner['alias'])) {
2131                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
2132                         $contacts = DBA::select('contact', ['uid'], $condition);
2133                         while ($contact = DBA::fetch($contacts)) {
2134                                 if ($contact['uid'] == 0) {
2135                                         continue;
2136                                 }
2137
2138                                 $users[$contact['uid']] = $contact['uid'];
2139                         }
2140                         DBA::close($contacts);
2141                 }
2142
2143                 $origin_uid = 0;
2144
2145                 if ($item['uri'] != $item['parent-uri']) {
2146                         $parents = Post::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2147                         while ($parent = Post::fetch($parents)) {
2148                                 $users[$parent['uid']] = $parent['uid'];
2149                                 if ($parent['origin'] && !$origin) {
2150                                         $origin_uid = $parent['uid'];
2151                                 }
2152                         }
2153                         DBA::close($parents);
2154                 }
2155
2156                 foreach ($users as $uid) {
2157                         if ($origin_uid == $uid) {
2158                                 $item['diaspora_signed_text'] = $signed_text;
2159                         }
2160                         self::storeForUser($item, $uid);
2161                 }
2162         }
2163
2164         /**
2165          * Store a public item defined by their URI-ID for the given users
2166          *
2167          * @param integer $uri_id URI-ID of the given item
2168          * @param integer $uid    The user that will receive the item entry
2169          * @param array   $fields Additional fields to be stored
2170          * @return integer stored item id
2171          */
2172         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [])
2173         {
2174                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => 0]);
2175                 if (!DBA::isResult($item)) {
2176                         return 0;
2177                 }
2178
2179                 if (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED)) {
2180                         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']]);
2181                         return 0;
2182                 }
2183
2184                 $item['post-type'] = self::PT_STORED;
2185
2186                 $item = array_merge($item, $fields);
2187
2188                 $stored = self::storeForUser($item, $uid);
2189                 Logger::info('Public item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
2190                 return $stored;
2191         }
2192
2193         /**
2194          * Store a public item array for the given users
2195          *
2196          * @param array   $item   The item entry that will be stored
2197          * @param integer $uid    The user that will receive the item entry
2198          * @return integer stored item id
2199          * @throws \Exception
2200          */
2201         private static function storeForUser(array $item, int $uid)
2202         {
2203                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
2204                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
2205                         return 0;
2206                 }
2207
2208                 unset($item['id']);
2209                 unset($item['parent']);
2210                 unset($item['mention']);
2211                 unset($item['starred']);
2212                 unset($item['unseen']);
2213                 unset($item['psid']);
2214
2215                 $item['uid'] = $uid;
2216                 $item['origin'] = 0;
2217                 $item['wall'] = 0;
2218
2219                 if ($item['gravity'] == GRAVITY_PARENT) {
2220                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
2221                 } else {
2222                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
2223                 }
2224
2225                 if (!empty($contact['id'])) {
2226                         $item['contact-id'] = $contact['id'];
2227                 } else {
2228                         // Shouldn't happen at all
2229                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
2230                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2231                         if (!DBA::isResult($self)) {
2232                                 // Shouldn't happen even less
2233                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
2234                                 return 0;
2235                         }
2236                         $item['contact-id'] = $self['id'];
2237                 }
2238
2239                 /// @todo Handling of "event-id"
2240
2241                 $notify = false;
2242                 if ($item['gravity'] == GRAVITY_PARENT) {
2243                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2244                         if (DBA::isResult($contact)) {
2245                                 $notify = self::isRemoteSelf($contact, $item);
2246                         }
2247                 }
2248
2249                 $distributed = self::insert($item, $notify, true);
2250
2251                 if (!$distributed) {
2252                         Logger::info("Distributed public item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
2253                 } else {
2254                         Logger::info('Distributed public item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
2255                 }
2256                 return $distributed;
2257         }
2258
2259         /**
2260          * Add a shadow entry for a given item id that is a thread starter
2261          *
2262          * We store every public item entry additionally with the user id "0".
2263          * This is used for the community page and for the search.
2264          * It is planned that in the future we will store public item entries only once.
2265          *
2266          * @param integer $itemid Item ID that should be added
2267          * @throws \Exception
2268          */
2269         private static function addShadow($itemid)
2270         {
2271                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2272                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2273                 $item = Post::selectFirst($fields, $condition);
2274
2275                 if (!DBA::isResult($item)) {
2276                         return;
2277                 }
2278
2279                 // is it already a copy?
2280                 if (($itemid == 0) || ($item['uid'] == 0)) {
2281                         return;
2282                 }
2283
2284                 // Is it a visible public post?
2285                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == self::PRIVATE)) {
2286                         return;
2287                 }
2288
2289                 // is it an entry from a connector? Only add an entry for natively connected networks
2290                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2291                         return;
2292                 }
2293
2294                 if (Post::exists(['uri' => $item['uri'], 'uid' => 0])) {
2295                         return;
2296                 }
2297
2298                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2299
2300                 if (DBA::isResult($item)) {
2301                         // Preparing public shadow (removing user specific data)
2302                         $item['uid'] = 0;
2303                         unset($item['id']);
2304                         unset($item['parent']);
2305                         unset($item['wall']);
2306                         unset($item['mention']);
2307                         unset($item['origin']);
2308                         unset($item['starred']);
2309                         unset($item['postopts']);
2310                         unset($item['inform']);
2311                         unset($item['post-type']);
2312                         if ($item['uri'] == $item['parent-uri']) {
2313                                 $item['contact-id'] = $item['owner-id'];
2314                         } else {
2315                                 $item['contact-id'] = $item['author-id'];
2316                         }
2317
2318                         $public_shadow = self::insert($item, false, true);
2319
2320                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
2321                 }
2322         }
2323
2324         /**
2325          * Add a shadow entry for a given item id that is a comment
2326          *
2327          * This function does the same like the function above - but for comments
2328          *
2329          * @param integer $itemid Item ID that should be added
2330          * @throws \Exception
2331          */
2332         private static function addShadowPost($itemid)
2333         {
2334                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2335                 if (!DBA::isResult($item)) {
2336                         return;
2337                 }
2338
2339                 // Is it a toplevel post?
2340                 if ($item['gravity'] == GRAVITY_PARENT) {
2341                         self::addShadow($itemid);
2342                         return;
2343                 }
2344
2345                 // Is this a shadow entry?
2346                 if ($item['uid'] == 0) {
2347                         return;
2348                 }
2349
2350                 // Is there a shadow parent?
2351                 if (!Post::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2352                         return;
2353                 }
2354
2355                 // Is there already a shadow entry?
2356                 if (Post::exists(['uri' => $item['uri'], 'uid' => 0])) {
2357                         return;
2358                 }
2359
2360                 // Save "origin" and "parent" state
2361                 $origin = $item['origin'];
2362                 $parent = $item['parent'];
2363
2364                 // Preparing public shadow (removing user specific data)
2365                 $item['uid'] = 0;
2366                 unset($item['id']);
2367                 unset($item['parent']);
2368                 unset($item['wall']);
2369                 unset($item['mention']);
2370                 unset($item['origin']);
2371                 unset($item['starred']);
2372                 unset($item['postopts']);
2373                 unset($item['inform']);
2374                 unset($item['post-type']);
2375                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2376
2377                 $public_shadow = self::insert($item, false, true);
2378
2379                 Logger::info('Stored public shadow', ['uri' => $item['uri'], 'id' => $public_shadow]);
2380
2381                 // If this was a comment to a Diaspora post we don't get our comment back.
2382                 // This means that we have to distribute the comment by ourselves.
2383                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2384                         self::distribute($public_shadow);
2385                 }
2386         }
2387
2388         /**
2389          * Adds a language specification in a "language" element of given $arr.
2390          * Expects "body" element to exist in $arr.
2391          *
2392          * @param array $item
2393          * @return string detected language
2394          * @throws \Text_LanguageDetect_Exception
2395          */
2396         private static function getLanguage(array $item)
2397         {
2398                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
2399                         return '';
2400                 }
2401
2402                 // Convert attachments to links
2403                 $naked_body = BBCode::removeAttachment($item['body']);
2404                 if (empty($naked_body)) {
2405                         return '';
2406                 }
2407
2408                 // Remove links and pictures
2409                 $naked_body = BBCode::removeLinks($naked_body);
2410
2411                 // Convert the title and the body to plain text
2412                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
2413
2414                 // Remove possibly remaining links
2415                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
2416
2417                 if (empty($naked_body)) {
2418                         return '';
2419                 }
2420
2421                 $ld = new Language(DI::l10n()->getAvailableLanguages());
2422                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
2423                 if (is_array($languages)) {
2424                         return json_encode($languages);
2425                 }
2426
2427                 return '';
2428         }
2429
2430         public static function getLanguageMessage(array $item)
2431         {
2432                 $iso639 = new \Matriphe\ISO639\ISO639;
2433
2434                 $used_languages = '';
2435                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2436                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
2437                 }
2438                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2439                 return $used_languages;
2440         }
2441
2442         /**
2443          * Creates an unique guid out of a given uri
2444          *
2445          * @param string $uri uri of an item entry
2446          * @param string $host hostname for the GUID prefix
2447          * @return string unique guid
2448          */
2449         public static function guidFromUri($uri, $host)
2450         {
2451                 // Our regular guid routine is using this kind of prefix as well
2452                 // We have to avoid that different routines could accidentally create the same value
2453                 $parsed = parse_url($uri);
2454
2455                 // We use a hash of the hostname as prefix for the guid
2456                 $guid_prefix = hash("crc32", $host);
2457
2458                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2459                 unset($parsed["scheme"]);
2460
2461                 // Glue it together to be able to make a hash from it
2462                 $host_id = implode("/", $parsed);
2463
2464                 // We could use any hash algorithm since it isn't a security issue
2465                 $host_hash = hash("ripemd128", $host_id);
2466
2467                 return $guid_prefix.$host_hash;
2468         }
2469
2470         /**
2471          * generate an unique URI
2472          *
2473          * @param integer $uid  User id
2474          * @param string  $guid An existing GUID (Otherwise it will be generated)
2475          *
2476          * @return string
2477          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2478          */
2479         public static function newURI($uid, $guid = "")
2480         {
2481                 if ($guid == "") {
2482                         $guid = System::createUUID();
2483                 }
2484
2485                 return DI::baseUrl()->get() . '/objects/' . $guid;
2486         }
2487
2488         /**
2489          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2490          *
2491          * This can be used to filter for inactive contacts.
2492          * Only do this for public postings to avoid privacy problems, since poco data is public.
2493          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2494          *
2495          * @param array $arr Contains the just posted item record
2496          * @throws \Exception
2497          */
2498         private static function updateContact($arr)
2499         {
2500                 // Unarchive the author
2501                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2502                 if (DBA::isResult($contact)) {
2503                         Contact::unmarkForArchival($contact);
2504                 }
2505
2506                 // Unarchive the contact if it's not our own contact
2507                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2508                 if (DBA::isResult($contact)) {
2509                         Contact::unmarkForArchival($contact);
2510                 }
2511
2512                 /// @todo On private posts we could obfuscate the date
2513                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2514
2515                 // Is it a forum? Then we don't care about the rules from above
2516                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2517                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2518                                 $update = true;
2519                         }
2520                 }
2521
2522                 if ($update) {
2523                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2524                         // So we have to ensure to only update the last item when it had been our own post,
2525                         // or it had been done by a "regular" contact.
2526                         if (!empty($arr['wall'])) {
2527                                 $condition = ['id' => $arr['contact-id']];
2528                         } else {
2529                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2530                         }
2531                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2532                 }
2533                 // Now do the same for the system wide contacts with uid=0
2534                 if ($arr['private'] != self::PRIVATE) {
2535                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2536                                 ['id' => $arr['owner-id']]);
2537
2538                         if ($arr['owner-id'] != $arr['author-id']) {
2539                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2540                                         ['id' => $arr['author-id']]);
2541                         }
2542                 }
2543         }
2544
2545         public static function setHashtags($body)
2546         {
2547                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code'], function ($body) {
2548                         $tags = BBCode::getTags($body);
2549
2550                         // No hashtags?
2551                         if (!count($tags)) {
2552                                 return $body;
2553                         }
2554
2555                         // This sorting is important when there are hashtags that are part of other hashtags
2556                         // Otherwise there could be problems with hashtags like #test and #test2
2557                         // Because of this we are sorting from the longest to the shortest tag.
2558                         usort($tags, function ($a, $b) {
2559                                 return strlen($b) <=> strlen($a);
2560                         });
2561
2562                         $URLSearchString = "^\[\]";
2563
2564                         // All hashtags should point to the home server if "local_tags" is activated
2565                         if (DI::config()->get('system', 'local_tags')) {
2566                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2567                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2568                         }
2569
2570                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2571                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2572                                 function ($match) {
2573                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2574                                 }, $body);
2575
2576                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2577                                 function ($match) {
2578                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2579                                 }, $body);
2580
2581                         $body = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2582                                 function ($match) {
2583                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2584                                 }, $body);
2585
2586                         // Repair recursive urls
2587                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2588                                 "&num;$2", $body);
2589
2590                         foreach ($tags as $tag) {
2591                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2592                                         continue;
2593                                 }
2594
2595                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2596                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2597
2598                                 $body = str_replace($tag, $newtag, $body);
2599                         }
2600
2601                         // Convert back the masked hashtags
2602                         $body = str_replace("&num;", "#", $body);
2603
2604                         return $body;
2605                 });
2606
2607                 return $body;
2608         }
2609
2610         /**
2611          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2612          *
2613          * @param int $uid
2614          * @param int $item_id
2615          * @return boolean true if item was deleted, else false
2616          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2617          * @throws \ImagickException
2618          */
2619         private static function tagDeliver($uid, $item_id)
2620         {
2621                 $mention = false;
2622
2623                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2624                 if (!DBA::isResult($user)) {
2625                         return false;
2626                 }
2627
2628                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2629                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2630
2631                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2632                 if (!DBA::isResult($item)) {
2633                         return false;
2634                 }
2635
2636                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2637
2638                 /*
2639                  * Diaspora uses their own hardwired link URL in @-tags
2640                  * instead of the one we supply with webfinger
2641                  */
2642                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2643
2644                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2645                 if ($cnt) {
2646                         foreach ($matches as $mtch) {
2647                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2648                                         $mention = true;
2649                                         Logger::log('mention found: ' . $mtch[2]);
2650                                 }
2651                         }
2652                 }
2653
2654                 if (!$mention) {
2655                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
2656                         foreach ($tags as $tag) {
2657                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
2658                                         $mention = true;
2659                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
2660                                 }
2661                         }
2662                 }
2663
2664                 if (!$mention) {
2665                         if (($community_page || $prvgroup) &&
2666                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
2667                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2668                                 DBA::delete('item', ['id' => $item_id]);
2669                                 return true;
2670                         }
2671                         return false;
2672                 }
2673
2674                 $arr = ['item' => $item, 'user' => $user];
2675
2676                 Hook::callAll('tagged', $arr);
2677
2678                 if (!$community_page && !$prvgroup) {
2679                         return false;
2680                 }
2681
2682                 /*
2683                  * tgroup delivery - setup a second delivery chain
2684                  * prevent delivery looping - only proceed
2685                  * if the message originated elsewhere and is a top-level post
2686                  */
2687                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2688                         return false;
2689                 }
2690
2691                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2692                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2693                 if (!DBA::isResult($self)) {
2694                         return false;
2695                 }
2696
2697                 $owner_id = Contact::getIdForURL($self['url']);
2698
2699                 // also reset all the privacy bits to the forum default permissions
2700
2701                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2702
2703                 $psid = PermissionSet::getIdFromACL(
2704                         $user['uid'],
2705                         $user['allow_cid'],
2706                         $user['allow_gid'],
2707                         $user['deny_cid'],
2708                         $user['deny_gid']
2709                 );
2710
2711                 $forum_mode = ($prvgroup ? 2 : 1);
2712
2713                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2714                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2715                 self::update($fields, ['id' => $item_id]);
2716
2717                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2718
2719                 self::performActivity($item_id, 'announce', $uid);
2720
2721                 return false;
2722         }
2723
2724         /**
2725          * Automatically reshare the item if the "remote_self" option is selected
2726          *
2727          * @param array $item
2728          * @return void
2729          */
2730         private static function autoReshare(array $item)
2731         {
2732                 if ($item['gravity'] != GRAVITY_PARENT) {
2733                         return;
2734                 }
2735
2736                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2737                         return;
2738                 }
2739
2740                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2741                         return;
2742                 }
2743
2744                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2745
2746                 self::performActivity($item['id'], 'announce', $item['uid']);
2747         }
2748
2749         public static function isRemoteSelf($contact, &$datarray)
2750         {
2751                 if (!$contact['remote_self']) {
2752                         return false;
2753                 }
2754
2755                 // Prevent the forwarding of posts that are forwarded
2756                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2757                         Logger::info('Already forwarded');
2758                         return false;
2759                 }
2760
2761                 // Prevent to forward already forwarded posts
2762                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2763                         Logger::info('Already forwarded (second test)');
2764                         return false;
2765                 }
2766
2767                 // Only forward posts
2768                 if ($datarray["verb"] != Activity::POST) {
2769                         Logger::info('No post');
2770                         return false;
2771                 }
2772
2773                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2774                         Logger::info('Not public');
2775                         return false;
2776                 }
2777
2778                 $datarray2 = $datarray;
2779                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2780                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2781                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2782                                         ['uid' => $contact['uid'], 'self' => true]);
2783                         if (DBA::isResult($self)) {
2784                                 $datarray['contact-id'] = $self["id"];
2785
2786                                 $datarray['owner-name'] = $self["name"];
2787                                 $datarray['owner-link'] = $self["url"];
2788                                 $datarray['owner-avatar'] = $self["thumb"];
2789
2790                                 $datarray['author-name']   = $datarray['owner-name'];
2791                                 $datarray['author-link']   = $datarray['owner-link'];
2792                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2793
2794                                 unset($datarray['edited']);
2795
2796                                 unset($datarray['network']);
2797                                 unset($datarray['owner-id']);
2798                                 unset($datarray['author-id']);
2799                         }
2800
2801                         if ($contact['network'] != Protocol::FEED) {
2802                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2803                                 $datarray["guid"] = System::createUUID();
2804                                 unset($datarray["plink"]);
2805                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2806                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2807                                 $datarray["extid"] = Protocol::DFRN;
2808                                 $urlpart = parse_url($datarray2['author-link']);
2809                                 $datarray["app"] = $urlpart["host"];
2810                                 if (!empty($old_uri_id)) {
2811                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2812                                 }
2813
2814                                 unset($datarray["parent-uri"]);
2815                                 unset($datarray["thr-parent"]);
2816                         } else {
2817                                 $datarray['private'] = self::PUBLIC;
2818                         }
2819                 }
2820
2821                 if ($contact['network'] != Protocol::FEED) {
2822                         // Store the original post
2823                         $result = self::insert($datarray2);
2824                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2825                 } else {
2826                         $datarray["app"] = "Feed";
2827                         $result = true;
2828                 }
2829
2830                 // Trigger automatic reactions for addons
2831                 $datarray['api_source'] = true;
2832
2833                 // We have to tell the hooks who we are - this really should be improved
2834                 $_SESSION['authenticated'] = true;
2835                 $_SESSION['uid'] = $contact['uid'];
2836
2837                 return (bool)$result;
2838         }
2839
2840         /**
2841          *
2842          * @param string $s
2843          * @param int    $uid
2844          * @param array  $item
2845          * @param int    $cid
2846          * @return string
2847          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2848          * @throws \ImagickException
2849          */
2850         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2851         {
2852                 if (DI::config()->get('system', 'disable_embedded')) {
2853                         return $s;
2854                 }
2855
2856                 Logger::info('check for photos');
2857                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2858
2859                 $orig_body = $s;
2860                 $new_body = '';
2861
2862                 $img_start = strpos($orig_body, '[img');
2863                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2864                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2865
2866                 while (($img_st_close !== false) && ($img_len !== false)) {
2867                         $img_st_close++; // make it point to AFTER the closing bracket
2868                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2869
2870                         Logger::info('found photo', ['image' => $image]);
2871
2872                         if (stristr($image, $site . '/photo/')) {
2873                                 // Only embed locally hosted photos
2874                                 $replace = false;
2875                                 $i = basename($image);
2876                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2877                                 $x = strpos($i, '-');
2878
2879                                 if ($x) {
2880                                         $res = substr($i, $x + 1);
2881                                         $i = substr($i, 0, $x);
2882                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2883                                         if (DBA::isResult($photo)) {
2884                                                 /*
2885                                                  * Check to see if we should replace this photo link with an embedded image
2886                                                  * 1. No need to do so if the photo is public
2887                                                  * 2. If there's a contact-id provided, see if they're in the access list
2888                                                  *    for the photo. If so, embed it.
2889                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2890                                                  *    permissions, regardless of order but first check to see if they're an exact
2891                                                  *    match to save some processing overhead.
2892                                                  */
2893                                                 if (self::hasPermissions($photo)) {
2894                                                         if ($cid) {
2895                                                                 $recips = self::enumeratePermissions($photo);
2896                                                                 if (in_array($cid, $recips)) {
2897                                                                         $replace = true;
2898                                                                 }
2899                                                         } elseif ($item) {
2900                                                                 if (self::samePermissions($uid, $item, $photo)) {
2901                                                                         $replace = true;
2902                                                                 }
2903                                                         }
2904                                                 }
2905                                                 if ($replace) {
2906                                                         $photo_img = Photo::getImageForPhoto($photo);
2907                                                         // If a custom width and height were specified, apply before embedding
2908                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2909                                                                 Logger::info('scaling photo');
2910
2911                                                                 $width = intval($match[1]);
2912                                                                 $height = intval($match[2]);
2913
2914                                                                 $photo_img->scaleDown(max($width, $height));
2915                                                         }
2916
2917                                                         $data = $photo_img->asString();
2918                                                         $type = $photo_img->getType();
2919
2920                                                         Logger::info('replacing photo');
2921                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2922                                                         Logger::debug('replaced', ['image' => $image]);
2923                                                 }
2924                                         }
2925                                 }
2926                         }
2927
2928                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2929                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2930                         if ($orig_body === false) {
2931                                 $orig_body = '';
2932                         }
2933
2934                         $img_start = strpos($orig_body, '[img');
2935                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2936                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2937                 }
2938
2939                 $new_body = $new_body . $orig_body;
2940
2941                 return $new_body;
2942         }
2943
2944         private static function hasPermissions($obj)
2945         {
2946                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2947                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2948         }
2949
2950         private static function samePermissions($uid, $obj1, $obj2)
2951         {
2952                 // first part is easy. Check that these are exactly the same.
2953                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2954                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2955                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2956                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2957                         return true;
2958                 }
2959
2960                 // This is harder. Parse all the permissions and compare the resulting set.
2961                 $recipients1 = self::enumeratePermissions($obj1);
2962                 $recipients2 = self::enumeratePermissions($obj2);
2963                 sort($recipients1);
2964                 sort($recipients2);
2965
2966                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2967                 return ($recipients1 == $recipients2);
2968         }
2969
2970         /**
2971          * Returns an array of contact-ids that are allowed to see this object
2972          *
2973          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2974          * @param bool  $check_dead Prunes unavailable contacts from the result
2975          * @return array
2976          * @throws \Exception
2977          */
2978         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2979         {
2980                 $aclFormater = DI::aclFormatter();
2981
2982                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2983                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2984                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2985                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2986                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2987                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2988                 $recipients   = array_diff($recipients, $deny);
2989                 return $recipients;
2990         }
2991
2992         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2993         {
2994                 if (!$uid || ($days < 1)) {
2995                         return;
2996                 }
2997
2998                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2999                         $uid, GRAVITY_PARENT];
3000
3001                 /*
3002                  * $expire_network_only = save your own wall posts
3003                  * and just expire conversations started by others
3004                  */
3005                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3006
3007                 if ($expire_network_only) {
3008                         $condition[0] .= " AND NOT `wall`";
3009                 }
3010
3011                 if ($network != "") {
3012                         $condition[0] .= " AND `network` = ?";
3013                         $condition[] = $network;
3014                 }
3015
3016                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3017                 $condition[] = $days;
3018
3019                 $items = Post::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3020
3021                 if (!DBA::isResult($items)) {
3022                         return;
3023                 }
3024
3025                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3026
3027                 // Forcing expiring of items - but not notes and marked items
3028                 if ($force) {
3029                         $expire_items = true;
3030                 }
3031
3032                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3033                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3034                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3035
3036                 $expired = 0;
3037
3038                 $priority = DI::config()->get('system', 'expire-notify-priority');
3039
3040                 while ($item = Post::fetch($items)) {
3041                         // don't expire filed items
3042
3043                         if (strpos($item['file'], '[') !== false) {
3044                                 continue;
3045                         }
3046
3047                         // Only expire posts, not photos and photo comments
3048
3049                         if (!$expire_photos && strlen($item['resource-id'])) {
3050                                 continue;
3051                         } elseif (!$expire_starred && intval($item['starred'])) {
3052                                 continue;
3053                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == self::PT_PERSONAL_NOTE))) {
3054                                 continue;
3055                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
3056                                 continue;
3057                         }
3058
3059                         self::markForDeletionById($item['id'], $priority);
3060
3061                         ++$expired;
3062                 }
3063                 DBA::close($items);
3064                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3065         }
3066
3067         public static function firstPostDate($uid, $wall = false)
3068         {
3069                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3070                 $params = ['order' => ['received' => false]];
3071                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3072                 if (DBA::isResult($thread)) {
3073                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3074                 }
3075                 return false;
3076         }
3077
3078         /**
3079          * add/remove activity to an item
3080          *
3081          * Toggle activities as like,dislike,attend of an item
3082          *
3083          * @param int $item_id
3084          * @param string $verb
3085          *            Activity verb. One of
3086          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3087          *            attendno, unattendno, attendmaybe, unattendmaybe,
3088          *            announce, unannouce
3089          * @return bool
3090          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3091          * @throws \ImagickException
3092          * @hook  'post_local_end'
3093          *            array $arr
3094          *            'post_id' => ID of posted item
3095          */
3096         public static function performActivity(int $item_id, string $verb, int $uid)
3097         {
3098                 if (empty($uid)) {
3099                         return false;
3100                 }
3101
3102                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
3103
3104                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
3105                 if (!DBA::isResult($item)) {
3106                         Logger::log('like: unknown item ' . $item_id);
3107                         return false;
3108                 }
3109
3110                 $item_uri = $item['uri'];
3111
3112                 if (!in_array($item['uid'], [0, $uid])) {
3113                         return false;
3114                 }
3115
3116                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
3117                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
3118                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
3119                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
3120                                 if (!DBA::isResult($item)) {
3121                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'item-uri' => $item_uri]);
3122                                         return false;
3123                                 }
3124                         }
3125                 }
3126
3127                 // Retrieves the local post owner
3128                 $owner = User::getOwnerDataById($uid);
3129                 if (empty($owner)) {
3130                         Logger::info('Empty owner for user', ['uid' => $uid]);
3131                         return false;
3132                 }
3133
3134                 // Retrieve the current logged in user's public contact
3135                 $author_id = Contact::getIdForURL($owner['url']);
3136                 if (empty($author_id)) {
3137                         Logger::info('Empty public contact');
3138                         return false;
3139                 }
3140
3141                 $activity = null;
3142                 switch ($verb) {
3143                         case 'like':
3144                         case 'unlike':
3145                                 $activity = Activity::LIKE;
3146                                 break;
3147                         case 'dislike':
3148                         case 'undislike':
3149                                 $activity = Activity::DISLIKE;
3150                                 break;
3151                         case 'attendyes':
3152                         case 'unattendyes':
3153                                 $activity = Activity::ATTEND;
3154                                 break;
3155                         case 'attendno':
3156                         case 'unattendno':
3157                                 $activity = Activity::ATTENDNO;
3158                                 break;
3159                         case 'attendmaybe':
3160                         case 'unattendmaybe':
3161                                 $activity = Activity::ATTENDMAYBE;
3162                                 break;
3163                         case 'follow':
3164                         case 'unfollow':
3165                                 $activity = Activity::FOLLOW;
3166                                 break;
3167                         case 'announce':
3168                         case 'unannounce':
3169                                 $activity = Activity::ANNOUNCE;
3170                                 break;
3171                         default:
3172                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
3173                                 return false;
3174                 }
3175
3176                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
3177
3178                 // Enable activity toggling instead of on/off
3179                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3180
3181                 // Look for an existing verb row
3182                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
3183                 if ($event_verb_flag) {
3184                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3185
3186                         // Translate to the index based activity index
3187                         $vids = [];
3188                         foreach ($verbs as $verb) {
3189                                 $vids[] = Verb::getID($verb);
3190                         }
3191                 } else {
3192                         $vids = Verb::getID($activity);
3193                 }
3194
3195                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3196                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3197                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
3198
3199                 if (DBA::isResult($like_item)) {
3200                         /**
3201                          * Truth table for existing activities
3202                          *
3203                          * |          Inputs            ||      Outputs      |
3204                          * |----------------------------||-------------------|
3205                          * |  Mode  | Event | Same verb || Delete? | Return? |
3206                          * |--------|-------|-----------||---------|---------|
3207                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
3208                          * | create |  Yes  |    No     ||   Yes   |   No    |
3209                          * | create |  No   |    Yes    ||   No    |   Yes   |
3210                          * | create |  No   |    No     ||        N/A†       |
3211                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
3212                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
3213                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
3214                          * | delete |  No   |    No     ||        N/A†       |
3215                          * |--------|-------|-----------||---------|---------|
3216                          * |   A    |   B   |     C     || A xor C | !B or C |
3217                          *
3218                          * † Can't happen: It's impossible to find an existing non-event activity without
3219                          *                 the same verb because we are only looking for this single verb.
3220                          *
3221                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
3222                          */
3223                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
3224                                 self::markForDeletionById($like_item['id']);
3225                         }
3226
3227                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3228                                 return true;
3229                         }
3230                 }
3231
3232                 // No need to go further if we aren't creating anything
3233                 if ($mode == 'delete') {
3234                         return true;
3235                 }
3236
3237                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3238
3239                 $new_item = [
3240                         'guid'          => System::createUUID(),
3241                         'uri'           => self::newURI($item['uid']),
3242                         'uid'           => $item['uid'],
3243                         'contact-id'    => $owner['id'],
3244                         'wall'          => $item['wall'],
3245                         'origin'        => 1,
3246                         'network'       => Protocol::DFRN,
3247                         'protocol'      => Conversation::PARCEL_DIRECT,
3248                         'direction'     => Conversation::PUSH,
3249                         'gravity'       => GRAVITY_ACTIVITY,
3250                         'parent'        => $item['id'],
3251                         'thr-parent'    => $item['uri'],
3252                         'owner-id'      => $author_id,
3253                         'author-id'     => $author_id,
3254                         'body'          => $activity,
3255                         'verb'          => $activity,
3256                         'object-type'   => $objtype,
3257                         'allow_cid'     => $item['allow_cid'],
3258                         'allow_gid'     => $item['allow_gid'],
3259                         'deny_cid'      => $item['deny_cid'],
3260                         'deny_gid'      => $item['deny_gid'],
3261                         'visible'       => 1,
3262                         'unseen'        => 1,
3263                 ];
3264
3265                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3266                 if (!empty($signed)) {
3267                         $new_item['diaspora_signed_text'] = json_encode($signed);
3268                 }
3269
3270                 $new_item_id = self::insert($new_item);
3271
3272                 // If the parent item isn't visible then set it to visible
3273                 if (!$item['visible']) {
3274                         self::update(['visible' => true], ['id' => $item['id']]);
3275                 }
3276
3277                 $new_item['id'] = $new_item_id;
3278
3279                 Hook::callAll('post_local_end', $new_item);
3280
3281                 return true;
3282         }
3283
3284         private static function addThread($itemid, $onlyshadow = false)
3285         {
3286                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3287                         'moderated', 'visible', 'starred', 'contact-id', 'post-type', 'uri-id',
3288                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3289                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3290                 $item = Post::selectFirst($fields, $condition);
3291
3292                 if (!DBA::isResult($item)) {
3293                         return;
3294                 }
3295
3296                 $item['iid'] = $itemid;
3297
3298                 if (!$onlyshadow) {
3299                         $result = DBA::replace('thread', $item);
3300
3301                         Logger::info('Add thread', ['item' => $itemid, 'result' => $result]);
3302                 }
3303         }
3304
3305         private static function updateThread($itemid, $setmention = false)
3306         {
3307                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3308                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id', 'uri-id',
3309                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3310
3311                 $item = Post::selectFirst($fields, ['id' => $itemid, 'gravity' => GRAVITY_PARENT]);
3312                 if (!DBA::isResult($item)) {
3313                         return;
3314                 }
3315
3316                 if ($setmention) {
3317                         $item["mention"] = 1;
3318                 }
3319
3320                 $fields = [];
3321
3322                 foreach ($item as $field => $data) {
3323                         if (!in_array($field, ["guid"])) {
3324                                 $fields[$field] = $data;
3325                         }
3326                 }
3327
3328                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3329
3330                 Logger::info('Update thread', ['item' => $itemid, 'guid' => $item["guid"], 'result' => $result]);
3331         }
3332
3333         private static function deleteThread($itemid, $itemuri = "")
3334         {
3335                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3336                 if (!DBA::isResult($item)) {
3337                         Logger::info('No thread found', ['id' => $itemid]);
3338                         return;
3339                 }
3340
3341                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3342
3343                 Logger::info('Deleted thread', ['item' => $itemid, 'result' => $result]);
3344
3345                 if ($itemuri != "") {
3346                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3347                         if (!Post::exists($condition)) {
3348                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3349                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3350                         }
3351                 }
3352         }
3353
3354         /**
3355          * Fetch the SQL condition for the given user id
3356          *
3357          * @param integer $owner_id User ID for which the permissions should be fetched
3358          * @return array condition
3359          */
3360         public static function getPermissionsConditionArrayByUserId(int $owner_id)
3361         {
3362                 $local_user = local_user();
3363                 $remote_user = Session::getRemoteContactID($owner_id);
3364
3365                 // default permissions - anonymous user
3366                 $condition = ["`private` != ?", self::PRIVATE];
3367
3368                 if ($local_user && ($local_user == $owner_id)) {
3369                         // Profile owner - everything is visible
3370                         $condition = [];
3371                 } elseif ($remote_user) {
3372                          // Authenticated visitor - fetch the matching permissionsets
3373                         $set = PermissionSet::get($owner_id, $remote_user);
3374                         if (!empty($set)) {
3375                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
3376                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
3377                                         self::PRIVATE, self::PRIVATE];
3378                                 $condition = array_merge($condition, $set);
3379                         }
3380                 }
3381
3382                 return $condition;
3383         }
3384
3385         public static function getPermissionsSQLByUserId($owner_id)
3386         {
3387                 $local_user = local_user();
3388                 $remote_user = Session::getRemoteContactID($owner_id);
3389
3390                 /*
3391                  * Construct permissions
3392                  *
3393                  * default permissions - anonymous user
3394                  */
3395                 $sql = sprintf(" AND `private` != %d", self::PRIVATE);
3396
3397                 // Profile owner - everything is visible
3398                 if ($local_user && ($local_user == $owner_id)) {
3399                         $sql = '';
3400                 } elseif ($remote_user) {
3401                         /*
3402                          * Authenticated visitor. Unless pre-verified,
3403                          * check that the contact belongs to this $owner_id
3404                          * and load the groups the visitor belongs to.
3405                          * If pre-verified, the caller is expected to have already
3406                          * done this and passed the groups into this function.
3407                          */
3408                         $set = PermissionSet::get($owner_id, $remote_user);
3409
3410                         if (!empty($set)) {
3411                                 $sql_set = sprintf(" OR (`private` = %d AND `wall` AND `psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3412                         } else {
3413                                 $sql_set = '';
3414                         }
3415
3416                         $sql = sprintf(" AND (`private` != %d", self::PRIVATE) . $sql_set . ")";
3417                 }
3418
3419                 return $sql;
3420         }
3421
3422         /**
3423          * get translated item type
3424          *
3425          * @param $item
3426          * @return string
3427          */
3428         public static function postType($item)
3429         {
3430                 if (!empty($item['event-id'])) {
3431                         return DI::l10n()->t('event');
3432                 } elseif (!empty($item['resource-id'])) {
3433                         return DI::l10n()->t('photo');
3434                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
3435                         return DI::l10n()->t('activity');
3436                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
3437                         return DI::l10n()->t('comment');
3438                 }
3439
3440                 return DI::l10n()->t('post');
3441         }
3442
3443         /**
3444          * Sets the "rendered-html" field of the provided item
3445          *
3446          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3447          *
3448          * @param array $item
3449          * @param bool  $update
3450          *
3451          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3452          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3453          */
3454         public static function putInCache(&$item, $update = false)
3455         {
3456                 // Save original body to prevent addons to modify it
3457                 $body = $item['body'];
3458
3459                 $rendered_hash = $item['rendered-hash'] ?? '';
3460                 $rendered_html = $item['rendered-html'] ?? '';
3461
3462                 if ($rendered_hash == ''
3463                         || $rendered_html == ''
3464                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
3465                         || DI::config()->get('system', 'ignore_cache')
3466                 ) {
3467                         self::addRedirToImageTags($item);
3468
3469                         $item['rendered-html'] = BBCode::convert($item['body']);
3470                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
3471
3472                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3473                         Hook::callAll('put_item_in_cache', $hook_data);
3474                         $item['rendered-html'] = $hook_data['rendered-html'];
3475                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3476                         unset($hook_data);
3477
3478                         // Force an update if the generated values differ from the existing ones
3479                         if ($rendered_hash != $item['rendered-hash']) {
3480                                 $update = true;
3481                         }
3482
3483                         // Only compare the HTML when we forcefully ignore the cache
3484                         if (DI::config()->get('system', 'ignore_cache') && ($rendered_html != $item['rendered-html'])) {
3485                                 $update = true;
3486                         }
3487
3488                         if ($update && !empty($item['id'])) {
3489                                 self::update(
3490                                         [
3491                                                 'rendered-html' => $item['rendered-html'],
3492                                                 'rendered-hash' => $item['rendered-hash']
3493                                         ],
3494                                         ['id' => $item['id']]
3495                                 );
3496                         }
3497                 }
3498
3499                 $item['body'] = $body;
3500         }
3501
3502         /**
3503          * Find any non-embedded images in private items and add redir links to them
3504          *
3505          * @param array &$item The field array of an item row
3506          */
3507         private static function addRedirToImageTags(array &$item)
3508         {
3509                 $app = DI::app();
3510
3511                 $matches = [];
3512                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3513                 if ($cnt) {
3514                         foreach ($matches as $mtch) {
3515                                 if (strpos($mtch[1], '/redir') !== false) {
3516                                         continue;
3517                                 }
3518
3519                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3520                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3521                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3522                                 }
3523                         }
3524                 }
3525         }
3526
3527         /**
3528          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3529          * If attach is true, also add icons for item attachments.
3530          *
3531          * @param array   $item
3532          * @param boolean $attach
3533          * @param boolean $is_preview
3534          * @return string item body html
3535          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3536          * @throws \ImagickException
3537          * @hook  prepare_body_init item array before any work
3538          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3539          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3540          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3541          */
3542         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3543         {
3544                 $a = DI::app();
3545                 Hook::callAll('prepare_body_init', $item);
3546
3547                 // In order to provide theme developers more possibilities, event items
3548                 // are treated differently.
3549                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3550                         $ev = Event::getItemHTML($item);
3551                         return $ev;
3552                 }
3553
3554                 $tags = Tag::populateFromItem($item);
3555
3556                 $item['tags'] = $tags['tags'];
3557                 $item['hashtags'] = $tags['hashtags'];
3558                 $item['mentions'] = $tags['mentions'];
3559
3560                 // Compile eventual content filter reasons
3561                 $filter_reasons = [];
3562                 if (!$is_preview && public_contact() != $item['author-id']) {
3563                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3564                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3565                         }
3566
3567                         $hook_data = [
3568                                 'item' => $item,
3569                                 'filter_reasons' => $filter_reasons
3570                         ];
3571                         Hook::callAll('prepare_body_content_filter', $hook_data);
3572                         $filter_reasons = $hook_data['filter_reasons'];
3573                         unset($hook_data);
3574                 }
3575
3576                 // Update the cached values if there is no "zrl=..." on the links.
3577                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3578
3579                 // Or update it if the current viewer is the intented viewer.
3580                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3581                         $update = true;
3582                 }
3583
3584                 self::putInCache($item, $update);
3585                 $s = $item["rendered-html"];
3586
3587                 $hook_data = [
3588                         'item' => $item,
3589                         'html' => $s,
3590                         'preview' => $is_preview,
3591                         'filter_reasons' => $filter_reasons
3592                 ];
3593                 Hook::callAll('prepare_body', $hook_data);
3594                 $s = $hook_data['html'];
3595                 unset($hook_data);
3596
3597                 if (!$attach) {
3598                         // Replace the blockquotes with quotes that are used in mails.
3599                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3600                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3601                         return $s;
3602                 }
3603
3604                 $as = '';
3605                 $vhead = false;
3606                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT, Post\Media::TORRENT, Post\Media::UNKNOWN]) as $attachment) {
3607                         $mime = $attachment['mimetype'];
3608
3609                         $the_url = Contact::magicLinkById($item['author-id'], $attachment['url']);
3610
3611                         if (strpos($mime, 'video') !== false) {
3612                                 if (!$vhead) {
3613                                         $vhead = true;
3614                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3615                                 }
3616
3617                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3618                                         '$video' => [
3619                                                 'id'     => $item['author-id'],
3620                                                 'title'  => DI::l10n()->t('View Video'),
3621                                                 'src'    => $the_url,
3622                                                 'mime'   => $mime,
3623                                         ],
3624                                 ]);
3625                         }
3626
3627                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3628                         if ($filetype) {
3629                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3630                                 $filesubtype = str_replace('.', '-', $filesubtype);
3631                         } else {
3632                                 $filetype = 'unkn';
3633                                 $filesubtype = 'unkn';
3634                         }
3635
3636                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3637                         $title .= ' ' . ($attachment['size'] ?? 0) . ' ' . DI::l10n()->t('bytes');
3638
3639                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3640                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3641                 }
3642
3643                 if ($as != '') {
3644                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3645                 }
3646
3647                 // Map.
3648                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3649                         $x = Map::byCoordinates(trim($item['coord']));
3650                         if ($x) {
3651                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3652                         }
3653                 }
3654
3655                 // Replace friendica image url size with theme preference.
3656                 if (!empty($a->theme_info['item_image_size'])) {
3657                         $ps = $a->theme_info['item_image_size'];
3658                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3659                 }
3660
3661                 $s = HTML::applyContentFilter($s, $filter_reasons);
3662
3663                 $hook_data = ['item' => $item, 'html' => $s];
3664                 Hook::callAll('prepare_body_final', $hook_data);
3665
3666                 return $hook_data['html'];
3667         }
3668
3669         /**
3670          * get private link for item
3671          *
3672          * @param array $item
3673          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3674          * @throws \Exception
3675          */
3676         public static function getPlink($item)
3677         {
3678                 if (local_user()) {
3679                         $ret = [
3680                                 'href' => "display/" . $item['guid'],
3681                                 'orig' => "display/" . $item['guid'],
3682                                 'title' => DI::l10n()->t('View on separate page'),
3683                                 'orig_title' => DI::l10n()->t('view on separate page'),
3684                         ];
3685
3686                         if (!empty($item['plink'])) {
3687                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3688                                 $ret["title"] = DI::l10n()->t('link to source');
3689                         }
3690                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3691                         $ret = [
3692                                 'href' => $item['plink'],
3693                                 'orig' => $item['plink'],
3694                                 'title' => DI::l10n()->t('link to source'),
3695                         ];
3696                 } else {
3697                         $ret = [];
3698                 }
3699
3700                 return $ret;
3701         }
3702
3703         /**
3704          * Is the given item array a post that is sent as starting post to a forum?
3705          *
3706          * @param array $item
3707          * @param array $owner
3708          *
3709          * @return boolean "true" when it is a forum post
3710          */
3711         public static function isForumPost(array $item, array $owner = [])
3712         {
3713                 if (empty($owner)) {
3714                         $owner = User::getOwnerDataById($item['uid']);
3715                         if (empty($owner)) {
3716                                 return false;
3717                         }
3718                 }
3719
3720                 if (($item['author-id'] == $item['owner-id']) ||
3721                         ($owner['id'] == $item['contact-id']) ||
3722                         ($item['uri'] != $item['parent-uri']) ||
3723                         $item['origin']) {
3724                         return false;
3725                 }
3726
3727                 return Contact::isForum($item['contact-id']);
3728         }
3729
3730         /**
3731          * Search item id for given URI or plink
3732          *
3733          * @param string $uri
3734          * @param integer $uid
3735          *
3736          * @return integer item id
3737          */
3738         public static function searchByLink($uri, $uid = 0)
3739         {
3740                 $ssl_uri = str_replace('http://', 'https://', $uri);
3741                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3742
3743                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3744                 if (DBA::isResult($item)) {
3745                         return $item['id'];
3746                 }
3747
3748                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3749                 if (!DBA::isResult($itemcontent)) {
3750                         return 0;
3751                 }
3752
3753                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3754                 if (!DBA::isResult($itemuri)) {
3755                         return 0;
3756                 }
3757
3758                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3759                 if (DBA::isResult($item)) {
3760                         return $item['id'];
3761                 }
3762
3763                 return 0;
3764         }
3765
3766         /**
3767          * Return the URI for a link to the post
3768          *
3769          * @param string $uri URI or link to post
3770          *
3771          * @return string URI
3772          */
3773         public static function getURIByLink(string $uri)
3774         {
3775                 $ssl_uri = str_replace('http://', 'https://', $uri);
3776                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3777
3778                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3779                 if (DBA::isResult($item)) {
3780                         return $item['uri'];
3781                 }
3782
3783                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3784                 if (!DBA::isResult($itemcontent)) {
3785                         return '';
3786                 }
3787
3788                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3789                 if (DBA::isResult($itemuri)) {
3790                         return $itemuri['uri'];
3791                 }
3792
3793                 return '';
3794         }
3795
3796         /**
3797          * Fetches item for given URI or plink
3798          *
3799          * @param string $uri
3800          * @param integer $uid
3801          *
3802          * @return integer item id
3803          */
3804         public static function fetchByLink(string $uri, int $uid = 0)
3805         {
3806                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3807                 $item_id = self::searchByLink($uri, $uid);
3808                 if (!empty($item_id)) {
3809                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3810                         return $item_id;
3811                 }
3812
3813                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3814                         $item_id = self::searchByLink($fetched_uri, $uid);
3815                 } else {
3816                         $item_id = Diaspora::fetchByURL($uri);
3817                 }
3818
3819                 if (!empty($item_id)) {
3820                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3821                         return $item_id;
3822                 }
3823
3824                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3825                 return 0;
3826         }
3827
3828         /**
3829          * Return share data from an item array (if the item is shared item)
3830          * We are providing the complete Item array, because at some time in the future
3831          * we hopefully will define these values not in the body anymore but in some item fields.
3832          * This function is meant to replace all similar functions in the system.
3833          *
3834          * @param array $item
3835          *
3836          * @return array with share information
3837          */
3838         public static function getShareArray($item)
3839         {
3840                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3841                         return [];
3842                 }
3843
3844                 $attribute_string = $matches[2];
3845                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3846                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3847                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3848                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3849                         }
3850                 }
3851                 return $attributes;
3852         }
3853
3854         /**
3855          * Fetch item information for shared items from the original items and adds it.
3856          *
3857          * @param array $item
3858          *
3859          * @return array item array with data from the original item
3860          */
3861         public static function addShareDataFromOriginal(array $item)
3862         {
3863                 $shared = self::getShareArray($item);
3864                 if (empty($shared)) {
3865                         return $item;
3866                 }
3867
3868                 // Real reshares always have got a GUID.
3869                 if (empty($shared['guid'])) {
3870                         return $item;
3871                 }
3872
3873                 $uid = $item['uid'] ?? 0;
3874
3875                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3876                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3877                 if (!DBA::isResult($shared_item)) {
3878                         if (empty($shared['link'])) {
3879                                 return $item;
3880                         }
3881
3882                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3883                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3884                         if (empty($id)) {
3885                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3886                                 return $item;
3887                         }
3888
3889                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3890                         if (!DBA::isResult($shared_item)) {
3891                                 return $item;
3892                         }
3893                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3894                 } else {
3895                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3896                 }
3897
3898                 if (!empty($shared_item['title'])) {
3899                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3900                         unset($shared_item['title']);
3901                 } else {
3902                         $body = $shared_item['body'];
3903                 }
3904
3905                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3906                 unset($shared_item['body']);
3907
3908                 return array_merge($item, $shared_item);
3909         }
3910
3911         /**
3912          * Check a prospective item array against user-level permissions
3913          *
3914          * @param array $item Expected keys: uri, gravity, and
3915          *                    author-link if is author-id is set,
3916          *                    owner-link if is owner-id is set,
3917          *                    causer-link if is causer-id is set.
3918          * @param int   $user_id Local user ID
3919          * @return bool
3920          * @throws \Exception
3921          */
3922         protected static function isAllowedByUser(array $item, int $user_id)
3923         {
3924                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3925                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3926                         return false;
3927                 }
3928
3929                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3930                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3931                         return false;
3932                 }
3933
3934                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3935                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3936                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3937                         return false;
3938                 }
3939
3940                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3941                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3942                         return false;
3943                 }
3944
3945                 return true;
3946         }
3947 }