src/Model/Item.php

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