src/Model/Item.php

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