src/Model/Item.php

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