src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Content\Text\BBCode;
  11 use Friendica\Content\Text\HTML;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\Hook;
  14 use Friendica\Core\L10n;
  15 use Friendica\Core\Lock;
  16 use Friendica\Core\Logger;
  17 use Friendica\Core\PConfig;
  18 use Friendica\Core\Protocol;
  19 use Friendica\Core\Renderer;
  20 use Friendica\Core\System;
  21 use Friendica\Core\Worker;
  22 use Friendica\Database\DBA;
  23 use Friendica\Protocol\Diaspora;
  24 use Friendica\Protocol\OStatus;
  25 use Friendica\Util\DateTimeFormat;
  26 use Friendica\Util\Map;
  27 use Friendica\Util\Network;
  28 use Friendica\Util\Security;
  29 use Friendica\Util\Strings;
  30 use Friendica\Util\XML;
  31 use Friendica\Worker\Delivery;
  32 use Text_LanguageDetect;
  33
  34 class Item extends BaseObject
  35 {
  36         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  37         const PT_ARTICLE = 0;
  38         const PT_NOTE = 1;
  39         const PT_PAGE = 2;
  40         const PT_IMAGE = 16;
  41         const PT_AUDIO = 17;
  42         const PT_VIDEO = 18;
  43         const PT_DOCUMENT = 19;
  44         const PT_EVENT = 32;
  45         const PT_PERSONAL_NOTE = 128;
  46
  47         // Field list that is used to display the items
  48         const DISPLAY_FIELDLIST = [
  49                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  50                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  51                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  52                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  53                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  54                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  55                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  56                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  57                 'writable', 'self', 'cid', 'alias',
  58                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  59                 'event-summary', 'event-desc', 'event-location', 'event-type',
  60                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  61                 'delivery_queue_count', 'delivery_queue_done'
  62         ];
  63
  64         // Field list that is used to deliver items via the protocols
  65         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  66                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  67                         'private', 'title', 'body', 'location', 'coord', 'app',
  68                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  69                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  70                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  71                         'signed_text', 'signature', 'signer', 'network'];
  72
  73         // Field list for "item-content" table that is mixed with the item table
  74         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  75                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  76                         'object-type', 'object', 'target-type', 'target', 'plink'];
  77
  78         // Field list for "item-content" table that is not present in the "item" table
  79         const CONTENT_FIELDLIST = ['language'];
  80
  81         // All fields in the item table
  82         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  83                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  84                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  85                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  86                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
  87                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  88                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  89                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  90                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  91                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  92                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  93
  94         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  95         // The item-activity table only stores the index and needs this array to know the matching activity.
  96         const ACTIVITIES = [ACTIVITY_LIKE, ACTIVITY_DISLIKE, ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE, ACTIVITY_FOLLOW, ACTIVITY2_ANNOUNCE];
  97
  98         private static $legacy_mode = null;
  99
 100         public static function isLegacyMode()
 101         {
 102                 if (is_null(self::$legacy_mode)) {
 103                         self::$legacy_mode = (Config::get("system", "post_update_version") < 1279);
 104                 }
 105
 106                 return self::$legacy_mode;
 107         }
 108
 109         /**
 110          * @brief returns an activity index from an activity string
 111          *
 112          * @param string $activity activity string
 113          * @return integer Activity index
 114          */
 115         public static function activityToIndex($activity)
 116         {
 117                 $index = array_search($activity, self::ACTIVITIES);
 118
 119                 if (is_bool($index)) {
 120                         $index = -1;
 121                 }
 122
 123                 return $index;
 124         }
 125
 126         /**
 127          * @brief returns an activity string from an activity index
 128          *
 129          * @param integer $index activity index
 130          * @return string Activity string
 131          */
 132         private static function indexToActivity($index)
 133         {
 134                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 135                         return '';
 136                 }
 137
 138                 return self::ACTIVITIES[$index];
 139         }
 140
 141         /**
 142          * @brief Fetch a single item row
 143          *
 144          * @param mixed $stmt statement object
 145          * @return array current row
 146          */
 147         public static function fetch($stmt)
 148         {
 149                 $row = DBA::fetch($stmt);
 150
 151                 if (is_bool($row)) {
 152                         return $row;
 153                 }
 154
 155                 // ---------------------- Transform item structure data ----------------------
 156
 157                 // We prefer the data from the user's contact over the public one
 158                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 159                         ($row['author-link'] == $row['contact-link'])) {
 160                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 161                                 $row['author-avatar'] = $row['contact-avatar'];
 162                         }
 163                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 164                                 $row['author-name'] = $row['contact-name'];
 165                         }
 166                 }
 167
 168                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 169                         ($row['owner-link'] == $row['contact-link'])) {
 170                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 171                                 $row['owner-avatar'] = $row['contact-avatar'];
 172                         }
 173                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 174                                 $row['owner-name'] = $row['contact-name'];
 175                         }
 176                 }
 177
 178                 // We can always comment on posts from these networks
 179                 if (array_key_exists('writable', $row) &&
 180                         in_array($row['internal-network'], [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS])) {
 181                         $row['writable'] = true;
 182                 }
 183
 184                 // ---------------------- Transform item content data ----------------------
 185
 186                 // Fetch data from the item-content table whenever there is content there
 187                 if (self::isLegacyMode()) {
 188                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 189                         foreach ($legacy_fields as $field) {
 190                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 191                                         $row[$field] = $row['internal-item-' . $field];
 192                                 }
 193                                 unset($row['internal-item-' . $field]);
 194                         }
 195                 }
 196
 197                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 198                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 199                         if (array_key_exists('title', $row)) {
 200                                 $row['title'] = '';
 201                         }
 202                         if (array_key_exists('body', $row)) {
 203                                 $row['body'] = $row['verb'];
 204                         }
 205                         if (array_key_exists('object', $row)) {
 206                                 $row['object'] = '';
 207                         }
 208                         if (array_key_exists('object-type', $row)) {
 209                                 $row['object-type'] = ACTIVITY_OBJ_NOTE;
 210                         }
 211                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', ACTIVITY_POST, ACTIVITY_SHARE])) {
 212                         // Posts don't have an object or target - but having tags or files.
 213                         // We safe some performance by building tag and file strings only here.
 214                         // We remove object and target since they aren't used for this type.
 215                         if (array_key_exists('object', $row)) {
 216                                 $row['object'] = '';
 217                         }
 218                         if (array_key_exists('target', $row)) {
 219                                 $row['target'] = '';
 220                         }
 221                 }
 222
 223                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', ACTIVITY_POST, ACTIVITY_SHARE])) {
 224                         // Build the tag string out of the term entries
 225                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 226                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 227                         }
 228
 229                         // Build the file string out of the term entries
 230                         if (array_key_exists('file', $row) && empty($row['file'])) {
 231                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 232                         }
 233                 }
 234
 235                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 236                         $row['signed_text'] = $row['interaction'];
 237                 }
 238
 239                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 240                         $row['ignored'] = $row['internal-user-ignored'];
 241                 }
 242
 243                 // Remove internal fields
 244                 unset($row['internal-activity']);
 245                 unset($row['internal-network']);
 246                 unset($row['internal-iid']);
 247                 unset($row['internal-iaid']);
 248                 unset($row['internal-icid']);
 249                 unset($row['internal-user-ignored']);
 250                 unset($row['interaction']);
 251
 252                 return $row;
 253         }
 254
 255         /**
 256          * @brief Fills an array with data from an item query
 257          *
 258          * @param object $stmt statement object
 259          * @param bool   $do_close
 260          * @return array Data array
 261          */
 262         public static function inArray($stmt, $do_close = true) {
 263                 if (is_bool($stmt)) {
 264                         return $stmt;
 265                 }
 266
 267                 $data = [];
 268                 while ($row = self::fetch($stmt)) {
 269                         $data[] = $row;
 270                 }
 271                 if ($do_close) {
 272                         DBA::close($stmt);
 273                 }
 274                 return $data;
 275         }
 276
 277         /**
 278          * @brief Check if item data exists
 279          *
 280          * @param array $condition array of fields for condition
 281          *
 282          * @return boolean Are there rows for that condition?
 283          * @throws \Exception
 284          */
 285         public static function exists($condition) {
 286                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 287
 288                 if (is_bool($stmt)) {
 289                         $retval = $stmt;
 290                 } else {
 291                         $retval = (DBA::numRows($stmt) > 0);
 292                 }
 293
 294                 DBA::close($stmt);
 295
 296                 return $retval;
 297         }
 298
 299         /**
 300          * Retrieve a single record from the item table for a given user and returns it in an associative array
 301          *
 302          * @brief Retrieve a single record from a table
 303          * @param integer $uid User ID
 304          * @param array   $selected
 305          * @param array   $condition
 306          * @param array   $params
 307          * @return bool|array
 308          * @throws \Exception
 309          * @see   DBA::select
 310          */
 311         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 312         {
 313                 $params['uid'] = $uid;
 314
 315                 if (empty($selected)) {
 316                         $selected = Item::DISPLAY_FIELDLIST;
 317                 }
 318
 319                 return self::selectFirst($selected, $condition, $params);
 320         }
 321
 322         /**
 323          * @brief Select rows from the item table for a given user
 324          *
 325          * @param integer $uid       User ID
 326          * @param array   $selected  Array of selected fields, empty for all
 327          * @param array   $condition Array of fields for condition
 328          * @param array   $params    Array of several parameters
 329          *
 330          * @return boolean|object
 331          * @throws \Exception
 332          */
 333         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 334         {
 335                 $params['uid'] = $uid;
 336
 337                 if (empty($selected)) {
 338                         $selected = Item::DISPLAY_FIELDLIST;
 339                 }
 340
 341                 return self::select($selected, $condition, $params);
 342         }
 343
 344         /**
 345          * Retrieve a single record from the item table and returns it in an associative array
 346          *
 347          * @brief Retrieve a single record from a table
 348          * @param array $fields
 349          * @param array $condition
 350          * @param array $params
 351          * @return bool|array
 352          * @throws \Exception
 353          * @see   DBA::select
 354          */
 355         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 356         {
 357                 $params['limit'] = 1;
 358
 359                 $result = self::select($fields, $condition, $params);
 360
 361                 if (is_bool($result)) {
 362                         return $result;
 363                 } else {
 364                         $row = self::fetch($result);
 365                         DBA::close($result);
 366                         return $row;
 367                 }
 368         }
 369
 370         /**
 371          * @brief Select rows from the item table
 372          *
 373          * @param array $selected  Array of selected fields, empty for all
 374          * @param array $condition Array of fields for condition
 375          * @param array $params    Array of several parameters
 376          *
 377          * @return boolean|object
 378          * @throws \Exception
 379          */
 380         public static function select(array $selected = [], array $condition = [], $params = [])
 381         {
 382                 $uid = 0;
 383                 $usermode = false;
 384
 385                 if (isset($params['uid'])) {
 386                         $uid = $params['uid'];
 387                         $usermode = true;
 388                 }
 389
 390                 $fields = self::fieldlist($usermode);
 391
 392                 $select_fields = self::constructSelectFields($fields, $selected);
 393
 394                 $condition_string = DBA::buildCondition($condition);
 395
 396                 $condition_string = self::addTablesToFields($condition_string, $fields);
 397
 398                 if ($usermode) {
 399                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 400                 }
 401
 402                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 403
 404                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 405
 406                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 407
 408                 return DBA::p($sql, $condition);
 409         }
 410
 411         /**
 412          * @brief Select rows from the starting post in the item table
 413          *
 414          * @param integer $uid       User ID
 415          * @param array   $selected
 416          * @param array   $condition Array of fields for condition
 417          * @param array   $params    Array of several parameters
 418          *
 419          * @return boolean|object
 420          * @throws \Exception
 421          */
 422         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 423         {
 424                 $params['uid'] = $uid;
 425
 426                 if (empty($selected)) {
 427                         $selected = Item::DISPLAY_FIELDLIST;
 428                 }
 429
 430                 return self::selectThread($selected, $condition, $params);
 431         }
 432
 433         /**
 434          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 435          *
 436          * @brief Retrieve a single record from a table
 437          * @param integer $uid User ID
 438          * @param array   $selected
 439          * @param array   $condition
 440          * @param array   $params
 441          * @return bool|array
 442          * @throws \Exception
 443          * @see   DBA::select
 444          */
 445         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 446         {
 447                 $params['uid'] = $uid;
 448
 449                 if (empty($selected)) {
 450                         $selected = Item::DISPLAY_FIELDLIST;
 451                 }
 452
 453                 return self::selectFirstThread($selected, $condition, $params);
 454         }
 455
 456         /**
 457          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 458          *
 459          * @brief Retrieve a single record from a table
 460          * @param array $fields
 461          * @param array $condition
 462          * @param array $params
 463          * @return bool|array
 464          * @throws \Exception
 465          * @see   DBA::select
 466          */
 467         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 468         {
 469                 $params['limit'] = 1;
 470                 $result = self::selectThread($fields, $condition, $params);
 471
 472                 if (is_bool($result)) {
 473                         return $result;
 474                 } else {
 475                         $row = self::fetch($result);
 476                         DBA::close($result);
 477                         return $row;
 478                 }
 479         }
 480
 481         /**
 482          * @brief Select rows from the starting post in the item table
 483          *
 484          * @param array $selected  Array of selected fields, empty for all
 485          * @param array $condition Array of fields for condition
 486          * @param array $params    Array of several parameters
 487          *
 488          * @return boolean|object
 489          * @throws \Exception
 490          */
 491         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 492         {
 493                 $uid = 0;
 494                 $usermode = false;
 495
 496                 if (isset($params['uid'])) {
 497                         $uid = $params['uid'];
 498                         $usermode = true;
 499                 }
 500
 501                 $fields = self::fieldlist($usermode);
 502
 503                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 504
 505                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 506                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 507                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 508                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 509
 510                 $select_fields = self::constructSelectFields($fields, $selected);
 511
 512                 $condition_string = DBA::buildCondition($condition);
 513
 514                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 515                 $condition_string = self::addTablesToFields($condition_string, $fields);
 516
 517                 if ($usermode) {
 518                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 519                 }
 520
 521                 $param_string = DBA::buildParameter($params);
 522                 $param_string = self::addTablesToFields($param_string, $threadfields);
 523                 $param_string = self::addTablesToFields($param_string, $fields);
 524
 525                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 526
 527                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 528
 529                 return DBA::p($sql, $condition);
 530         }
 531
 532         /**
 533          * @brief Returns a list of fields that are associated with the item table
 534          *
 535          * @param $usermode
 536          * @return array field list
 537          */
 538         private static function fieldlist($usermode)
 539         {
 540                 $fields = [];
 541
 542                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 543                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 544                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 545                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 546                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 547                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 548                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 549                         'network' => 'internal-network', 'icid' => 'internal-icid',
 550                         'iaid' => 'internal-iaid'];
 551
 552                 if ($usermode) {
 553                         $fields['user-item'] = ['ignored' => 'internal-user-ignored'];
 554                 }
 555
 556                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 557
 558                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 559
 560                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 561
 562                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 563
 564                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 565                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 566
 567                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 568                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 569
 570                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 571                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 572                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 573
 574                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 575
 576                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 577
 578                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 579                         'start' => 'event-start','finish' => 'event-finish',
 580                         'summary' => 'event-summary','desc' => 'event-desc',
 581                         'location' => 'event-location', 'type' => 'event-type',
 582                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 583                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 584
 585                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 586
 587                 $fields['diaspora-interaction'] = ['interaction'];
 588
 589                 return $fields;
 590         }
 591
 592         /**
 593          * @brief Returns SQL condition for the "select" functions
 594          *
 595          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 596          *
 597          * @return string SQL condition
 598          */
 599         private static function condition($thread_mode)
 600         {
 601                 if ($thread_mode) {
 602                         $master_table = "`thread`";
 603                 } else {
 604                         $master_table = "`item`";
 605                 }
 606                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 607                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 608                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 609                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 610                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 611                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 612                         GRAVITY_PARENT, GRAVITY_PARENT);
 613         }
 614
 615         /**
 616          * @brief Returns all needed "JOIN" commands for the "select" functions
 617          *
 618          * @param integer $uid          User ID
 619          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 620          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 621          *
 622          * @param         $user_mode
 623          * @return string The SQL joins for the "select" functions
 624          */
 625         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 626         {
 627                 if ($thread_mode) {
 628                         $master_table = "`thread`";
 629                         $master_table_key = "`thread`.`iid`";
 630                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 631                 } else {
 632                         $master_table = "`item`";
 633                         $master_table_key = "`item`.`id`";
 634                         $joins = '';
 635                 }
 636
 637                 if ($user_mode) {
 638                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 639                                 AND NOT `contact`.`blocked`
 640                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 641                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 642                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 643                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 644                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 645                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 646                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 647                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 648                 } else {
 649                         if (strpos($sql_commands, "`contact`.") !== false) {
 650                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 651                         }
 652                         if (strpos($sql_commands, "`author`.") !== false) {
 653                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 654                         }
 655                         if (strpos($sql_commands, "`owner`.") !== false) {
 656                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 657                         }
 658                 }
 659
 660                 if (strpos($sql_commands, "`group_member`.") !== false) {
 661                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 662                 }
 663
 664                 if (strpos($sql_commands, "`user`.") !== false) {
 665                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 666                 }
 667
 668                 if (strpos($sql_commands, "`event`.") !== false) {
 669                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 670                 }
 671
 672                 if (strpos($sql_commands, "`sign`.") !== false) {
 673                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 674                 }
 675
 676                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 677                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 678                 }
 679
 680                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 681                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 682                 }
 683
 684                 if (strpos($sql_commands, "`item-content`.") !== false) {
 685                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 686                 }
 687
 688                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 689                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 690                 }
 691
 692                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 693                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 694                 }
 695
 696                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 697                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 698                 }
 699
 700                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 701                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 702                 }
 703
 704                 return $joins;
 705         }
 706
 707         /**
 708          * @brief Add the field list for the "select" functions
 709          *
 710          * @param array $fields The field definition array
 711          * @param array $selected The array with the selected fields from the "select" functions
 712          *
 713          * @return string The field list
 714          */
 715         private static function constructSelectFields($fields, $selected)
 716         {
 717                 if (!empty($selected)) {
 718                         $selected[] = 'internal-iid';
 719                         $selected[] = 'internal-iaid';
 720                         $selected[] = 'internal-icid';
 721                         $selected[] = 'internal-network';
 722                 }
 723
 724                 if (in_array('verb', $selected)) {
 725                         $selected[] = 'internal-activity';
 726                 }
 727
 728                 if (in_array('ignored', $selected)) {
 729                         $selected[] = 'internal-user-ignored';
 730                 }
 731
 732                 if (in_array('signed_text', $selected)) {
 733                         $selected[] = 'interaction';
 734                 }
 735
 736                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 737
 738                 $selection = [];
 739                 foreach ($fields as $table => $table_fields) {
 740                         foreach ($table_fields as $field => $select) {
 741                                 if (empty($selected) || in_array($select, $selected)) {
 742                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 743                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 744                                         }
 745                                         if (is_int($field)) {
 746                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 747                                         } else {
 748                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 749                                         }
 750                                 }
 751                         }
 752                 }
 753                 return implode(", ", $selection);
 754         }
 755
 756         /**
 757          * @brief add table definition to fields in an SQL query
 758          *
 759          * @param string $query SQL query
 760          * @param array $fields The field definition array
 761          *
 762          * @return string the changed SQL query
 763          */
 764         private static function addTablesToFields($query, $fields)
 765         {
 766                 foreach ($fields as $table => $table_fields) {
 767                         foreach ($table_fields as $alias => $field) {
 768                                 if (is_int($alias)) {
 769                                         $replace_field = $field;
 770                                 } else {
 771                                         $replace_field = $alias;
 772                                 }
 773
 774                                 $search = "/([^\.])`" . $field . "`/i";
 775                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 776                                 $query = preg_replace($search, $replace, $query);
 777                         }
 778                 }
 779                 return $query;
 780         }
 781
 782         /**
 783          * @brief Update existing item entries
 784          *
 785          * @param array $fields    The fields that are to be changed
 786          * @param array $condition The condition for finding the item entries
 787          *
 788          * In the future we may have to change permissions as well.
 789          * Then we had to add the user id as third parameter.
 790          *
 791          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 792          *
 793          * @return integer|boolean number of affected rows - or "false" if there was an error
 794          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 795          */
 796         public static function update(array $fields, array $condition)
 797         {
 798                 if (empty($condition) || empty($fields)) {
 799                         return false;
 800                 }
 801
 802                 // To ensure the data integrity we do it in an transaction
 803                 DBA::transaction();
 804
 805                 // We cannot simply expand the condition to check for origin entries
 806                 // The condition needn't to be a simple array but could be a complex condition.
 807                 // And we have to execute this query before the update to ensure to fetch the same data.
 808                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 809
 810                 $content_fields = [];
 811                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 812                         if (isset($fields[$field])) {
 813                                 $content_fields[$field] = $fields[$field];
 814                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 815                                         unset($fields[$field]);
 816                                 } else {
 817                                         $fields[$field] = null;
 818                                 }
 819                         }
 820                 }
 821
 822                 $delivery_data = ItemDeliveryData::extractFields($fields);
 823
 824                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 825                 foreach ($clear_fields as $field) {
 826                         if (array_key_exists($field, $fields)) {
 827                                 $fields[$field] = null;
 828                         }
 829                 }
 830
 831                 if (array_key_exists('tag', $fields)) {
 832                         $tags = $fields['tag'];
 833                         $fields['tag'] = null;
 834                 } else {
 835                         $tags = null;
 836                 }
 837
 838                 if (array_key_exists('file', $fields)) {
 839                         $files = $fields['file'];
 840                         $fields['file'] = null;
 841                 } else {
 842                         $files = null;
 843                 }
 844
 845                 if (!empty($fields)) {
 846                         $success = DBA::update('item', $fields, $condition);
 847
 848                         if (!$success) {
 849                                 DBA::close($items);
 850                                 DBA::rollback();
 851                                 return false;
 852                         }
 853                 }
 854
 855                 // When there is no content for the "old" item table, this will count the fetched items
 856                 $rows = DBA::affectedRows();
 857
 858                 while ($item = DBA::fetch($items)) {
 859                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 860                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 861
 862                                 if (empty($item['iaid'])) {
 863                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 864                                         if (DBA::isResult($item_activity)) {
 865                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 866                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 867                                                         if (self::isLegacyMode()) {
 868                                                                 $item_fields[$field] = null;
 869                                                         } else {
 870                                                                 unset($item_fields[$field]);
 871                                                         }
 872                                                 }
 873                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 874
 875                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 876                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 877                                                 }
 878                                         }
 879                                 } elseif (!empty($item['icid'])) {
 880                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 881
 882                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 883                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 884                                         }
 885                                 }
 886                         } else {
 887                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 888
 889                                 if (empty($item['icid'])) {
 890                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 891                                         if (DBA::isResult($item_content)) {
 892                                                 $item_fields = ['icid' => $item_content['id']];
 893                                                 // Clear all fields in the item table that have a content in the item-content table
 894                                                 foreach ($item_content as $field => $content) {
 895                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
 896                                                                 if (self::isLegacyMode()) {
 897                                                                         $item_fields[$field] = null;
 898                                                                 } else {
 899                                                                         unset($item_fields[$field]);
 900                                                                 }
 901                                                         }
 902                                                 }
 903                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 904                                         }
 905                                 }
 906                         }
 907
 908                         if (!is_null($tags)) {
 909                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
 910                                 if (!empty($item['tag'])) {
 911                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
 912                                 }
 913                         }
 914
 915                         if (!is_null($files)) {
 916                                 Term::insertFromFileFieldByItemId($item['id'], $files);
 917                                 if (!empty($item['file'])) {
 918                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
 919                                 }
 920                         }
 921
 922                         ItemDeliveryData::update($item['id'], $delivery_data);
 923
 924                         self::updateThread($item['id']);
 925
 926                         // We only need to notfiy others when it is an original entry from us.
 927                         // Only call the notifier when the item has some content relevant change.
 928                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 929                                 Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $item['id']);
 930                         }
 931                 }
 932
 933                 DBA::close($items);
 934                 DBA::commit();
 935                 return $rows;
 936         }
 937
 938         /**
 939          * @brief Delete an item and notify others about it - if it was ours
 940          *
 941          * @param array   $condition The condition for finding the item entries
 942          * @param integer $priority  Priority for the notification
 943          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 944          */
 945         public static function delete($condition, $priority = PRIORITY_HIGH)
 946         {
 947                 $items = self::select(['id'], $condition);
 948                 while ($item = self::fetch($items)) {
 949                         self::deleteById($item['id'], $priority);
 950                 }
 951                 DBA::close($items);
 952         }
 953
 954         /**
 955          * @brief Delete an item for an user and notify others about it - if it was ours
 956          *
 957          * @param array   $condition The condition for finding the item entries
 958          * @param integer $uid       User who wants to delete this item
 959          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 960          */
 961         public static function deleteForUser($condition, $uid)
 962         {
 963                 if ($uid == 0) {
 964                         return;
 965                 }
 966
 967                 $items = self::select(['id', 'uid'], $condition);
 968                 while ($item = self::fetch($items)) {
 969                         // "Deleting" global items just means hiding them
 970                         if ($item['uid'] == 0) {
 971                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 972                         } elseif ($item['uid'] == $uid) {
 973                                 self::deleteById($item['id'], PRIORITY_HIGH);
 974                         } else {
 975                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
 976                         }
 977                 }
 978                 DBA::close($items);
 979         }
 980
 981         /**
 982          * @brief Delete an item and notify others about it - if it was ours
 983          *
 984          * @param integer $item_id  Item ID that should be delete
 985          * @param integer $priority Priority for the notification
 986          *
 987          * @return boolean success
 988          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 989          */
 990         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
 991         {
 992                 // locate item to be deleted
 993                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 994                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 995                         'verb', 'object-type', 'object', 'target', 'contact-id',
 996                         'icid', 'iaid', 'psid'];
 997                 $item = self::selectFirst($fields, ['id' => $item_id]);
 998                 if (!DBA::isResult($item)) {
 999                         Logger::log('Item with ID ' . $item_id . " hasn't been found.", Logger::DEBUG);
1000                         return false;
1001                 }
1002
1003                 if ($item['deleted']) {
1004                         Logger::log('Item with ID ' . $item_id . ' has already been deleted.', Logger::DEBUG);
1005                         return false;
1006                 }
1007
1008                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1009                 if (!DBA::isResult($parent)) {
1010                         $parent = ['origin' => false];
1011                 }
1012
1013                 // clean up categories and tags so they don't end up as orphans
1014
1015                 $matches = false;
1016                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1017
1018                 if ($cnt) {
1019                         foreach ($matches as $mtch) {
1020                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1021                         }
1022                 }
1023
1024                 $matches = false;
1025
1026                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1027
1028                 if ($cnt) {
1029                         foreach ($matches as $mtch) {
1030                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1031                         }
1032                 }
1033
1034                 /*
1035                  * If item is a link to a photo resource, nuke all the associated photos
1036                  * (visitors will not have photo resources)
1037                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1038                  * generate a resource-id and therefore aren't intimately linked to the item.
1039                  */
1040                 /// @TODO: this should first check if photo is used elsewhere
1041                 if (strlen($item['resource-id'])) {
1042                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1043                 }
1044
1045                 // If item is a link to an event, delete the event.
1046                 if (intval($item['event-id'])) {
1047                         Event::delete($item['event-id']);
1048                 }
1049
1050                 // If item has attachments, drop them
1051                 /// @TODO: this should first check if attachment is used elsewhere
1052                 foreach (explode(",", $item['attach']) as $attach) {
1053                         preg_match("|attach/(\d+)|", $attach, $matches);
1054                         if (is_array($matches) && count($matches) > 1) {
1055                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1056                         }
1057                 }
1058
1059                 // Delete tags that had been attached to other items
1060                 self::deleteTagsFromItem($item);
1061
1062                 // Set the item to "deleted"
1063                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1064                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1065
1066                 Term::insertFromTagFieldByItemId($item['id'], '');
1067                 Term::insertFromFileFieldByItemId($item['id'], '');
1068                 self::deleteThread($item['id'], $item['parent-uri']);
1069
1070                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1071                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1072                 }
1073
1074                 ItemDeliveryData::delete($item['id']);
1075
1076                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1077
1078                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1079                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1080                 }
1081                 // When the permission set will be used in photo and events as well,
1082                 // this query here needs to be extended.
1083                 if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1084                         DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1085                 }
1086
1087                 // If it's the parent of a comment thread, kill all the kids
1088                 if ($item['id'] == $item['parent']) {
1089                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1090                 }
1091
1092                 // Is it our comment and/or our thread?
1093                 if ($item['origin'] || $parent['origin']) {
1094
1095                         // When we delete the original post we will delete all existing copies on the server as well
1096                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1097
1098                         // send the notification upstream/downstream
1099                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1100                 } elseif ($item['uid'] != 0) {
1101
1102                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1103                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1104                         if (DBA::isResult($global_item)) {
1105                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1106                         }
1107                 }
1108
1109                 Logger::log('Item with ID ' . $item_id . " has been deleted.", Logger::DEBUG);
1110
1111                 return true;
1112         }
1113
1114         private static function deleteTagsFromItem($item)
1115         {
1116                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
1117                         return;
1118                 }
1119
1120                 $xo = XML::parseString($item["object"], false);
1121                 $xt = XML::parseString($item["target"], false);
1122
1123                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
1124                         return;
1125                 }
1126
1127                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1128                 if (!DBA::isResult($i)) {
1129                         return;
1130                 }
1131
1132                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1133                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1134                 $author_copy = $item["origin"];
1135
1136                 if (($owner_remove && $author_copy) || !$owner_remove) {
1137                         return;
1138                 }
1139
1140                 $tags = explode(',', $i["tag"]);
1141                 $newtags = [];
1142                 if (count($tags)) {
1143                         foreach ($tags as $tag) {
1144                                 if (trim($tag) !== trim($xo->body)) {
1145                                        $newtags[] = trim($tag);
1146                                 }
1147                         }
1148                 }
1149                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1150         }
1151
1152         private static function guid($item, $notify)
1153         {
1154                 if (!empty($item['guid'])) {
1155                         return Strings::escapeTags(trim($item['guid']));
1156                 }
1157
1158                 if ($notify) {
1159                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1160                         // We add the hash of our own host because our host is the original creator of the post.
1161                         $prefix_host = \get_app()->getHostName();
1162                 } else {
1163                         $prefix_host = '';
1164
1165                         // We are only storing the post so we create a GUID from the original hostname.
1166                         if (!empty($item['author-link'])) {
1167                                 $parsed = parse_url($item['author-link']);
1168                                 if (!empty($parsed['host'])) {
1169                                         $prefix_host = $parsed['host'];
1170                                 }
1171                         }
1172
1173                         if (empty($prefix_host) && !empty($item['plink'])) {
1174                                 $parsed = parse_url($item['plink']);
1175                                 if (!empty($parsed['host'])) {
1176                                         $prefix_host = $parsed['host'];
1177                                 }
1178                         }
1179
1180                         if (empty($prefix_host) && !empty($item['uri'])) {
1181                                 $parsed = parse_url($item['uri']);
1182                                 if (!empty($parsed['host'])) {
1183                                         $prefix_host = $parsed['host'];
1184                                 }
1185                         }
1186
1187                         // Is it in the format data@host.tld? - Used for mail contacts
1188                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1189                                 $mailparts = explode('@', $item['author-link']);
1190                                 $prefix_host = array_pop($mailparts);
1191                         }
1192                 }
1193
1194                 if (!empty($item['plink'])) {
1195                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1196                 } elseif (!empty($item['uri'])) {
1197                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1198                 } else {
1199                         $guid = System::createUUID(hash('crc32', $prefix_host));
1200                 }
1201
1202                 return $guid;
1203         }
1204
1205         private static function contactId($item)
1206         {
1207                 $contact_id = (int)$item["contact-id"];
1208
1209                 if (!empty($contact_id)) {
1210                         return $contact_id;
1211                 }
1212                 Logger::log('Missing contact-id. Called by: '.System::callstack(), Logger::DEBUG);
1213                 /*
1214                  * First we are looking for a suitable contact that matches with the author of the post
1215                  * This is done only for comments
1216                  */
1217                 if ($item['parent-uri'] != $item['uri']) {
1218                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1219                 }
1220
1221                 // If not present then maybe the owner was found
1222                 if ($contact_id == 0) {
1223                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
1224                 }
1225
1226                 // Still missing? Then use the "self" contact of the current user
1227                 if ($contact_id == 0) {
1228                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
1229                         if (DBA::isResult($self)) {
1230                                 $contact_id = $self["id"];
1231                         }
1232                 }
1233                 Logger::log("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, Logger::DEBUG);
1234
1235                 return $contact_id;
1236         }
1237
1238         // This function will finally cover most of the preparation functionality in mod/item.php
1239         public static function prepare(&$item)
1240         {
1241                 /*
1242                  * @TODO: Unused code triggering inspection errors
1243                  *
1244                 $data = BBCode::getAttachmentData($item['body']);
1245                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1246                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1247                         $posttype = Item::PT_PAGE;
1248                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1249                 }
1250                  */
1251         }
1252
1253         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1254         {
1255                 $orig_item = $item;
1256
1257                 $priority = PRIORITY_HIGH;
1258
1259                 // If it is a posting where users should get notifications, then define it as wall posting
1260                 if ($notify) {
1261                         $item['wall'] = 1;
1262                         $item['origin'] = 1;
1263                         $item['network'] = Protocol::DFRN;
1264                         $item['protocol'] = Conversation::PARCEL_DFRN;
1265
1266                         if (is_int($notify)) {
1267                                 $priority = $notify;
1268                         }
1269                 } else {
1270                         $item['network'] = trim(defaults($item, 'network', Protocol::PHANTOM));
1271                 }
1272
1273                 $item['guid'] = self::guid($item, $notify);
1274                 $item['uri'] = Strings::escapeTags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
1275
1276                 // Store URI data
1277                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1278
1279                 // Store conversation data
1280                 $item = Conversation::insert($item);
1281
1282                 /*
1283                  * If a Diaspora signature structure was passed in, pull it out of the
1284                  * item array and set it aside for later storage.
1285                  */
1286
1287                 $dsprsig = null;
1288                 if (isset($item['dsprsig'])) {
1289                         $encoded_signature = $item['dsprsig'];
1290                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1291                         unset($item['dsprsig']);
1292                 }
1293
1294                 $diaspora_signed_text = '';
1295                 if (isset($item['diaspora_signed_text'])) {
1296                         $diaspora_signed_text = $item['diaspora_signed_text'];
1297                         unset($item['diaspora_signed_text']);
1298                 }
1299
1300                 // Converting the plink
1301                 /// @TODO Check if this is really still needed
1302                 if ($item['network'] == Protocol::OSTATUS) {
1303                         if (isset($item['plink'])) {
1304                                 $item['plink'] = OStatus::convertHref($item['plink']);
1305                         } elseif (isset($item['uri'])) {
1306                                 $item['plink'] = OStatus::convertHref($item['uri']);
1307                         }
1308                 }
1309
1310                 if (!empty($item['thr-parent'])) {
1311                         $item['parent-uri'] = $item['thr-parent'];
1312                 }
1313
1314                 if (isset($item['gravity'])) {
1315                         $item['gravity'] = intval($item['gravity']);
1316                 } elseif ($item['parent-uri'] === $item['uri']) {
1317                         $item['gravity'] = GRAVITY_PARENT;
1318                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1319                         $item['gravity'] = GRAVITY_COMMENT;
1320                 } elseif (activity_match($item['verb'], ACTIVITY_FOLLOW)) {
1321                         $item['gravity'] = GRAVITY_ACTIVITY;
1322                 } else {
1323                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1324                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1325                 }
1326
1327                 $uid = intval($item['uid']);
1328
1329                 // check for create date and expire time
1330                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1331
1332                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1333                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1334                         $expire_interval = $user['expire'];
1335                 }
1336
1337                 if (($expire_interval > 0) && !empty($item['created'])) {
1338                         $expire_date = time() - ($expire_interval * 86400);
1339                         $created_date = strtotime($item['created']);
1340                         if ($created_date < $expire_date) {
1341                                 Logger::notice('Item created before expiration interval.', [
1342                                         'created' => date('c', $created_date),
1343                                         'expired' => date('c', $expire_date),
1344                                         '$item' => $item
1345                                 ]);
1346                                 return 0;
1347                         }
1348                 }
1349
1350                 /*
1351                  * Do we already have this item?
1352                  * We have to check several networks since Friendica posts could be repeated
1353                  * via OStatus (maybe Diasporsa as well)
1354                  */
1355                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS, ""])) {
1356                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1357                                 trim($item['uri']), $item['uid'],
1358                                 Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1359                         $existing = self::selectFirst(['id', 'network'], $condition);
1360                         if (DBA::isResult($existing)) {
1361                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1362                                 if ($uid != 0) {
1363                                         Logger::notice('Item already existed for user', [
1364                                                 'uri' => $item['uri'],
1365                                                 'uid' => $uid,
1366                                                 'network' => $item['network'],
1367                                                 'existing_id' => $existing["id"],
1368                                                 'existing_network' => $existing["network"]
1369                                         ]);
1370                                 }
1371
1372                                 return $existing["id"];
1373                         }
1374                 }
1375
1376                 $item['wall']          = intval(defaults($item, 'wall', 0));
1377                 $item['extid']         = trim(defaults($item, 'extid', ''));
1378                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1379                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1380                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1381                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1382                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1383                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1384                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1385                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1386                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1387                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1388                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1389                 $item['title']         = trim(defaults($item, 'title', ''));
1390                 $item['location']      = trim(defaults($item, 'location', ''));
1391                 $item['coord']         = trim(defaults($item, 'coord', ''));
1392                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1393                 $item['deleted']       = 0;
1394                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1395                 $item['post-type']     = defaults($item, 'post-type', self::PT_ARTICLE);
1396                 $item['verb']          = trim(defaults($item, 'verb', ''));
1397                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1398                 $item['object']        = trim(defaults($item, 'object', ''));
1399                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1400                 $item['target']        = trim(defaults($item, 'target', ''));
1401                 $item['plink']         = trim(defaults($item, 'plink', ''));
1402                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1403                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1404                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1405                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1406                 $item['private']       = intval(defaults($item, 'private', 0));
1407                 $item['body']          = trim(defaults($item, 'body', ''));
1408                 $item['tag']           = trim(defaults($item, 'tag', ''));
1409                 $item['attach']        = trim(defaults($item, 'attach', ''));
1410                 $item['app']           = trim(defaults($item, 'app', ''));
1411                 $item['origin']        = intval(defaults($item, 'origin', 0));
1412                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1413                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1414                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1415                 $item['inform']        = trim(defaults($item, 'inform', ''));
1416                 $item['file']          = trim(defaults($item, 'file', ''));
1417
1418                 // When there is no content then we don't post it
1419                 if ($item['body'].$item['title'] == '') {
1420                         Logger::notice('No body, no title.');
1421                         return 0;
1422                 }
1423
1424                 self::addLanguageToItemArray($item);
1425
1426                 // Items cannot be stored before they happen ...
1427                 if ($item['created'] > DateTimeFormat::utcNow()) {
1428                         $item['created'] = DateTimeFormat::utcNow();
1429                 }
1430
1431                 // We haven't invented time travel by now.
1432                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1433                         $item['edited'] = DateTimeFormat::utcNow();
1434                 }
1435
1436                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1437
1438                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1439                 $item["contact-id"] = self::contactId($item);
1440
1441                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1442                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1443
1444                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item['author-link'], 0, false, $default));
1445
1446                 if (Contact::isBlocked($item['author-id'])) {
1447                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1448                         return 0;
1449                 }
1450
1451                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1452                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1453                         return 0;
1454                 }
1455
1456                 if (!empty($uid) && Contact::isBlockedByUser($item['author-link'], $uid)) {
1457                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1458                         return 0;
1459                 }
1460
1461                 if (!empty($uid) && ($item['parent-uri'] === $item['uri']) && Contact::isIgnoredByUser($item['author-link'], $uid)) {
1462                         Logger::notice('Author is ignored by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1463                         return 0;
1464                 }
1465
1466                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1467                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1468
1469                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item['owner-link'], 0, false, $default));
1470
1471                 if (Contact::isBlocked($item['owner-id'])) {
1472                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1473                         return 0;
1474                 }
1475
1476                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1477                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1478                         return 0;
1479                 }
1480
1481                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-link'], $uid)) {
1482                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1483                         return 0;
1484                 }
1485
1486                 if (!empty($uid) && ($item['parent-uri'] === $item['uri']) && Contact::isIgnoredByUser($item['owner-link'], $uid)) {
1487                         Logger::notice('Owner is ignored by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1488                         return 0;
1489                 }
1490
1491                 if ($item['network'] == Protocol::PHANTOM) {
1492                         $item['network'] = Protocol::DFRN;
1493                         Logger::notice('Missing network, setting to {network}.', [
1494                                 'uri' => $item["uri"],
1495                                 'network' => $item['network'],
1496                                 'callstack' => System::callstack()
1497                         ]);
1498                 }
1499
1500                 // Checking if there is already an item with the same guid
1501                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1502                 if (self::exists($condition)) {
1503                         Logger::notice('Found already existing item', [
1504                                 'guid' => $item['guid'],
1505                                 'uid' => $item['uid'],
1506                                 'network' => $item['network']
1507                         ]);
1508                         return 0;
1509                 }
1510
1511                 if ($item['verb'] == ACTIVITY_FOLLOW) {
1512                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1513                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1514                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1515                                 return 0;
1516                         }
1517
1518                         $condition = ['verb' => ACTIVITY_FOLLOW, 'uid' => $item['uid'],
1519                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1520                         if (self::exists($condition)) {
1521                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1522                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1523                                 return 0;
1524                         }
1525                 }
1526
1527                 // Check for hashtags in the body and repair or add hashtag links
1528                 self::setHashtags($item);
1529
1530                 $item['thr-parent'] = $item['parent-uri'];
1531
1532                 $notify_type = Delivery::POST;
1533                 $allow_cid = '';
1534                 $allow_gid = '';
1535                 $deny_cid  = '';
1536                 $deny_gid  = '';
1537
1538                 if ($item['parent-uri'] === $item['uri']) {
1539                         $parent_id = 0;
1540                         $parent_deleted = 0;
1541                         $allow_cid = $item['allow_cid'];
1542                         $allow_gid = $item['allow_gid'];
1543                         $deny_cid  = $item['deny_cid'];
1544                         $deny_gid  = $item['deny_gid'];
1545                 } else {
1546                         // find the parent and snarf the item id and ACLs
1547                         // and anything else we need to inherit
1548
1549                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1550                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1551                                 'wall', 'private', 'forum_mode', 'origin'];
1552                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1553                         $params = ['order' => ['id' => false]];
1554                         $parent = self::selectFirst($fields, $condition, $params);
1555
1556                         if (DBA::isResult($parent)) {
1557                                 // is the new message multi-level threaded?
1558                                 // even though we don't support it now, preserve the info
1559                                 // and re-attach to the conversation parent.
1560
1561                                 if ($parent['uri'] != $parent['parent-uri']) {
1562                                         $item['parent-uri'] = $parent['parent-uri'];
1563
1564                                         $condition = ['uri' => $item['parent-uri'],
1565                                                 'parent-uri' => $item['parent-uri'],
1566                                                 'uid' => $item['uid']];
1567                                         $params = ['order' => ['id' => false]];
1568                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1569
1570                                         if (DBA::isResult($toplevel_parent)) {
1571                                                 $parent = $toplevel_parent;
1572                                         }
1573                                 }
1574
1575                                 $parent_id      = $parent['id'];
1576                                 $parent_deleted = $parent['deleted'];
1577                                 $allow_cid      = $parent['allow_cid'];
1578                                 $allow_gid      = $parent['allow_gid'];
1579                                 $deny_cid       = $parent['deny_cid'];
1580                                 $deny_gid       = $parent['deny_gid'];
1581                                 $item['wall']   = $parent['wall'];
1582
1583                                 /*
1584                                  * If the parent is private, force privacy for the entire conversation
1585                                  * This differs from the above settings as it subtly allows comments from
1586                                  * email correspondents to be private even if the overall thread is not.
1587                                  */
1588                                 if ($parent['private']) {
1589                                         $item['private'] = $parent['private'];
1590                                 }
1591
1592                                 /*
1593                                  * Edge case. We host a public forum that was originally posted to privately.
1594                                  * The original author commented, but as this is a comment, the permissions
1595                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1596                                  */
1597                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1598                                         $item['private'] = 0;
1599                                 }
1600
1601                                 // If its a post that originated here then tag the thread as "mention"
1602                                 if ($item['origin'] && $item['uid']) {
1603                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1604                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1605                                 }
1606                         } else {
1607                                 /*
1608                                  * Allow one to see reply tweets from status.net even when
1609                                  * we don't have or can't see the original post.
1610                                  */
1611                                 if ($force_parent) {
1612                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1613                                         $parent_id = 0;
1614                                         $item['parent-uri'] = $item['uri'];
1615                                         $item['gravity'] = GRAVITY_PARENT;
1616                                 } else {
1617                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1618                                         return 0;
1619                                 }
1620
1621                                 $parent_deleted = 0;
1622                         }
1623                 }
1624
1625                 if (stristr($item['verb'], ACTIVITY_POKE)) {
1626                         $notify_type = Delivery::POKE;
1627                 }
1628
1629                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1630                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1631
1632                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1633                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1634                 if (self::exists($condition)) {
1635                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1636                         return 0;
1637                 }
1638
1639                 // On Friendica and Diaspora the GUID is unique
1640                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1641                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1642                         if (self::exists($condition)) {
1643                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1644                                 return 0;
1645                         }
1646                 } else {
1647                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1648                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1649                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1650                         if (self::exists($condition)) {
1651                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1652                                 return 0;
1653                         }
1654                 }
1655
1656                 // Is this item available in the global items (with uid=0)?
1657                 if ($item["uid"] == 0) {
1658                         $item["global"] = true;
1659
1660                         // Set the global flag on all items if this was a global item entry
1661                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1662                 } else {
1663                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1664                 }
1665
1666                 // ACL settings
1667                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1668                         $private = 1;
1669                 } else {
1670                         $private = $item['private'];
1671                 }
1672
1673                 $item["allow_cid"] = $allow_cid;
1674                 $item["allow_gid"] = $allow_gid;
1675                 $item["deny_cid"] = $deny_cid;
1676                 $item["deny_gid"] = $deny_gid;
1677                 $item["private"] = $private;
1678                 $item["deleted"] = $parent_deleted;
1679
1680                 // Fill the cache field
1681                 self::putInCache($item);
1682
1683                 if ($notify) {
1684                         $item['edit'] = false;
1685                         $item['parent'] = $parent_id;
1686                         Hook::callAll('post_local', $item);
1687                         unset($item['edit']);
1688                         unset($item['parent']);
1689                 } else {
1690                         Hook::callAll('post_remote', $item);
1691                 }
1692
1693                 // This array field is used to trigger some automatic reactions
1694                 // It is mainly used in the "post_local" hook.
1695                 unset($item['api_source']);
1696
1697                 if (!empty($item['cancel'])) {
1698                         Logger::log('post cancelled by addon.');
1699                         return 0;
1700                 }
1701
1702                 /*
1703                  * Check for already added items.
1704                  * There is a timing issue here that sometimes creates double postings.
1705                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1706                  */
1707                 if ($item["uid"] == 0) {
1708                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1709                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1710                                 return 0;
1711                         }
1712                 }
1713
1714                 Logger::log('' . print_r($item,true), Logger::DATA);
1715
1716                 if (array_key_exists('tag', $item)) {
1717                         $tags = $item['tag'];
1718                         unset($item['tag']);
1719                 } else {
1720                         $tags = '';
1721                 }
1722
1723                 if (array_key_exists('file', $item)) {
1724                         $files = $item['file'];
1725                         unset($item['file']);
1726                 } else {
1727                         $files = '';
1728                 }
1729
1730                 // Creates or assigns the permission set
1731                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1732
1733                 // We are doing this outside of the transaction to avoid timing problems
1734                 if (!self::insertActivity($item)) {
1735                         self::insertContent($item);
1736                 }
1737
1738                 $delivery_data = ItemDeliveryData::extractFields($item);
1739
1740                 unset($item['postopts']);
1741                 unset($item['inform']);
1742
1743                 // These fields aren't stored anymore in the item table, they are fetched upon request
1744                 unset($item['author-link']);
1745                 unset($item['author-name']);
1746                 unset($item['author-avatar']);
1747                 unset($item['author-network']);
1748
1749                 unset($item['owner-link']);
1750                 unset($item['owner-name']);
1751                 unset($item['owner-avatar']);
1752
1753                 DBA::transaction();
1754                 $ret = DBA::insert('item', $item);
1755
1756                 // When the item was successfully stored we fetch the ID of the item.
1757                 if (DBA::isResult($ret)) {
1758                         $current_post = DBA::lastInsertId();
1759                 } else {
1760                         // This can happen - for example - if there are locking timeouts.
1761                         DBA::rollback();
1762
1763                         // Store the data into a spool file so that we can try again later.
1764
1765                         // At first we restore the Diaspora signature that we removed above.
1766                         if (isset($encoded_signature)) {
1767                                 $item['dsprsig'] = $encoded_signature;
1768                         }
1769
1770                         // Now we store the data in the spool directory
1771                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1772                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1773
1774                         $spoolpath = get_spoolpath();
1775                         if ($spoolpath != "") {
1776                                 $spool = $spoolpath.'/'.$file;
1777
1778                                 file_put_contents($spool, json_encode($orig_item));
1779                                 Logger::log("Item wasn't stored - Item was spooled into file ".$file, Logger::DEBUG);
1780                         }
1781                         return 0;
1782                 }
1783
1784                 if ($current_post == 0) {
1785                         // This is one of these error messages that never should occur.
1786                         Logger::log("couldn't find created item - we better quit now.");
1787                         DBA::rollback();
1788                         return 0;
1789                 }
1790
1791                 // How much entries have we created?
1792                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1793                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1794
1795                 if ($entries > 1) {
1796                         // There are duplicates. We delete our just created entry.
1797                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1798
1799                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1800                         DBA::delete('item', ['id' => $current_post]);
1801                         DBA::commit();
1802                         return 0;
1803                 } elseif ($entries == 0) {
1804                         // This really should never happen since we quit earlier if there were problems.
1805                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1806                         DBA::rollback();
1807                         return 0;
1808                 }
1809
1810                 Logger::log('created item '.$current_post);
1811                 self::updateContact($item);
1812
1813                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1814                         $parent_id = $current_post;
1815                 }
1816
1817                 // Set parent id
1818                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1819
1820                 $item['id'] = $current_post;
1821                 $item['parent'] = $parent_id;
1822
1823                 // update the commented timestamp on the parent
1824                 // Only update "commented" if it is really a comment
1825                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1826                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1827                 } else {
1828                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1829                 }
1830
1831                 if ($dsprsig) {
1832                         /*
1833                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1834                          * We can check for this condition when we decode and encode the stuff again.
1835                          */
1836                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1837                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1838                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1839                         }
1840
1841                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1842                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1843                         } else {
1844                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1845                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1846                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1847                         }
1848                 }
1849
1850                 if (!empty($diaspora_signed_text)) {
1851                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1852                 }
1853
1854                 self::tagDeliver($item['uid'], $current_post);
1855
1856                 /*
1857                  * current post can be deleted if is for a community page and no mention are
1858                  * in it.
1859                  */
1860                 if (!$dontcache) {
1861                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1862                         if (DBA::isResult($posted_item)) {
1863                                 if ($notify) {
1864                                         Hook::callAll('post_local_end', $posted_item);
1865                                 } else {
1866                                         Hook::callAll('post_remote_end', $posted_item);
1867                                 }
1868                         } else {
1869                                 Logger::log('new item not found in DB, id ' . $current_post);
1870                         }
1871                 }
1872
1873                 if ($item['parent-uri'] === $item['uri']) {
1874                         self::addThread($current_post);
1875                 } else {
1876                         self::updateThread($parent_id);
1877                 }
1878
1879                 ItemDeliveryData::insert($current_post, $delivery_data);
1880
1881                 DBA::commit();
1882
1883                 /*
1884                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1885                  * This is not perfect - but a workable solution until we found the reason for the problem.
1886                  */
1887                 if (!empty($tags)) {
1888                         Term::insertFromTagFieldByItemId($current_post, $tags);
1889                 }
1890
1891                 if (!empty($files)) {
1892                         Term::insertFromFileFieldByItemId($current_post, $files);
1893                 }
1894
1895                 if ($item['parent-uri'] === $item['uri']) {
1896                         self::addShadow($current_post);
1897                 } else {
1898                         self::addShadowPost($current_post);
1899                 }
1900
1901                 check_user_notification($current_post);
1902
1903                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
1904                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
1905                 }
1906
1907                 return $current_post;
1908         }
1909
1910         /**
1911          * @brief Insert a new item content entry
1912          *
1913          * @param array $item The item fields that are to be inserted
1914          * @return bool
1915          * @throws \Exception
1916          */
1917         private static function insertActivity(&$item)
1918         {
1919                 $activity_index = self::activityToIndex($item['verb']);
1920
1921                 if ($activity_index < 0) {
1922                         return false;
1923                 }
1924
1925                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
1926
1927                 // We just remove everything that is content
1928                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1929                         unset($item[$field]);
1930                 }
1931
1932                 // To avoid timing problems, we are using locks.
1933                 $locked = Lock::acquire('item_insert_activity');
1934                 if (!$locked) {
1935                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1936                 }
1937
1938                 // Do we already have this content?
1939                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
1940                 if (DBA::isResult($item_activity)) {
1941                         $item['iaid'] = $item_activity['id'];
1942                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1943                 } elseif (DBA::insert('item-activity', $fields)) {
1944                         $item['iaid'] = DBA::lastInsertId();
1945                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1946                 } else {
1947                         // This shouldn't happen.
1948                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
1949                         Lock::release('item_insert_activity');
1950                         return false;
1951                 }
1952                 if ($locked) {
1953                         Lock::release('item_insert_activity');
1954                 }
1955                 return true;
1956         }
1957
1958         /**
1959          * @brief Insert a new item content entry
1960          *
1961          * @param array $item The item fields that are to be inserted
1962          * @throws \Exception
1963          */
1964         private static function insertContent(&$item)
1965         {
1966                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
1967
1968                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1969                         if (isset($item[$field])) {
1970                                 $fields[$field] = $item[$field];
1971                                 unset($item[$field]);
1972                         }
1973                 }
1974
1975                 // To avoid timing problems, we are using locks.
1976                 $locked = Lock::acquire('item_insert_content');
1977                 if (!$locked) {
1978                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1979                 }
1980
1981                 // Do we already have this content?
1982                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
1983                 if (DBA::isResult($item_content)) {
1984                         $item['icid'] = $item_content['id'];
1985                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1986                 } elseif (DBA::insert('item-content', $fields)) {
1987                         $item['icid'] = DBA::lastInsertId();
1988                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1989                 } else {
1990                         // This shouldn't happen.
1991                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
1992                 }
1993                 if ($locked) {
1994                         Lock::release('item_insert_content');
1995                 }
1996         }
1997
1998         /**
1999          * @brief Update existing item content entries
2000          *
2001          * @param array $item      The item fields that are to be changed
2002          * @param array $condition The condition for finding the item content entries
2003          * @return bool
2004          * @throws \Exception
2005          */
2006         private static function updateActivity($item, $condition)
2007         {
2008                 if (empty($item['verb'])) {
2009                         return false;
2010                 }
2011                 $activity_index = self::activityToIndex($item['verb']);
2012
2013                 if ($activity_index < 0) {
2014                         return false;
2015                 }
2016
2017                 $fields = ['activity' => $activity_index];
2018
2019                 Logger::log('Update activity for ' . json_encode($condition));
2020
2021                 DBA::update('item-activity', $fields, $condition, true);
2022
2023                 return true;
2024         }
2025
2026         /**
2027          * @brief Update existing item content entries
2028          *
2029          * @param array $item      The item fields that are to be changed
2030          * @param array $condition The condition for finding the item content entries
2031          * @throws \Exception
2032          */
2033         private static function updateContent($item, $condition)
2034         {
2035                 // We have to select only the fields from the "item-content" table
2036                 $fields = [];
2037                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2038                         if (isset($item[$field])) {
2039                                 $fields[$field] = $item[$field];
2040                         }
2041                 }
2042
2043                 if (empty($fields)) {
2044                         // when there are no fields at all, just use the condition
2045                         // This is to ensure that we always store content.
2046                         $fields = $condition;
2047                 }
2048
2049                 Logger::log('Update content for ' . json_encode($condition));
2050
2051                 DBA::update('item-content', $fields, $condition, true);
2052         }
2053
2054         /**
2055          * @brief Distributes public items to the receivers
2056          *
2057          * @param integer $itemid      Item ID that should be added
2058          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2059          * @throws \Exception
2060          */
2061         public static function distribute($itemid, $signed_text = '')
2062         {
2063                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2064                 $parent = self::selectFirst(['owner-id'], $condition);
2065                 if (!DBA::isResult($parent)) {
2066                         return;
2067                 }
2068
2069                 // Only distribute public items from native networks
2070                 $condition = ['id' => $itemid, 'uid' => 0,
2071                         'network' => [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS, ""],
2072                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2073                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2074                 if (!DBA::isResult($item)) {
2075                         return;
2076                 }
2077
2078                 $origin = $item['origin'];
2079
2080                 unset($item['id']);
2081                 unset($item['parent']);
2082                 unset($item['mention']);
2083                 unset($item['wall']);
2084                 unset($item['origin']);
2085                 unset($item['starred']);
2086
2087                 $users = [];
2088
2089                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2090                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2091                 if (!DBA::isResult($owner)) {
2092                         return;
2093                 }
2094
2095                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2096                 $contacts = DBA::select('contact', ['uid'], $condition);
2097                 while ($contact = DBA::fetch($contacts)) {
2098                         if ($contact['uid'] == 0) {
2099                                 continue;
2100                         }
2101
2102                         $users[$contact['uid']] = $contact['uid'];
2103                 }
2104                 DBA::close($contacts);
2105
2106                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2107                 $contacts = DBA::select('contact', ['uid'], $condition);
2108                 while ($contact = DBA::fetch($contacts)) {
2109                         if ($contact['uid'] == 0) {
2110                                 continue;
2111                         }
2112
2113                         $users[$contact['uid']] = $contact['uid'];
2114                 }
2115                 DBA::close($contacts);
2116
2117                 if (!empty($owner['alias'])) {
2118                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2119                         $contacts = DBA::select('contact', ['uid'], $condition);
2120                         while ($contact = DBA::fetch($contacts)) {
2121                                 if ($contact['uid'] == 0) {
2122                                         continue;
2123                                 }
2124
2125                                 $users[$contact['uid']] = $contact['uid'];
2126                         }
2127                         DBA::close($contacts);
2128                 }
2129
2130                 $origin_uid = 0;
2131
2132                 if ($item['uri'] != $item['parent-uri']) {
2133                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2134                         while ($parent = self::fetch($parents)) {
2135                                 $users[$parent['uid']] = $parent['uid'];
2136                                 if ($parent['origin'] && !$origin) {
2137                                         $origin_uid = $parent['uid'];
2138                                 }
2139                         }
2140                 }
2141
2142                 foreach ($users as $uid) {
2143                         if ($origin_uid == $uid) {
2144                                 $item['diaspora_signed_text'] = $signed_text;
2145                         }
2146                         self::storeForUser($itemid, $item, $uid);
2147                 }
2148         }
2149
2150         /**
2151          * @brief Store public items for the receivers
2152          *
2153          * @param integer $itemid Item ID that should be added
2154          * @param array   $item   The item entry that will be stored
2155          * @param integer $uid    The user that will receive the item entry
2156          * @throws \Exception
2157          */
2158         private static function storeForUser($itemid, $item, $uid)
2159         {
2160                 $item['uid'] = $uid;
2161                 $item['origin'] = 0;
2162                 $item['wall'] = 0;
2163                 if ($item['uri'] == $item['parent-uri']) {
2164                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2165                 } else {
2166                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2167                 }
2168
2169                 if (empty($item['contact-id'])) {
2170                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2171                         if (!DBA::isResult($self)) {
2172                                 return;
2173                         }
2174                         $item['contact-id'] = $self['id'];
2175                 }
2176
2177                 /// @todo Handling of "event-id"
2178
2179                 $notify = false;
2180                 if ($item['uri'] == $item['parent-uri']) {
2181                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2182                         if (DBA::isResult($contact)) {
2183                                 $notify = self::isRemoteSelf($contact, $item);
2184                         }
2185                 }
2186
2187                 $distributed = self::insert($item, false, $notify, true);
2188
2189                 if (!$distributed) {
2190                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2191                 } else {
2192                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2193                 }
2194         }
2195
2196         /**
2197          * @brief Add a shadow entry for a given item id that is a thread starter
2198          *
2199          * We store every public item entry additionally with the user id "0".
2200          * This is used for the community page and for the search.
2201          * It is planned that in the future we will store public item entries only once.
2202          *
2203          * @param integer $itemid Item ID that should be added
2204          * @throws \Exception
2205          */
2206         public static function addShadow($itemid)
2207         {
2208                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2209                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2210                 $item = self::selectFirst($fields, $condition);
2211
2212                 if (!DBA::isResult($item)) {
2213                         return;
2214                 }
2215
2216                 // is it already a copy?
2217                 if (($itemid == 0) || ($item['uid'] == 0)) {
2218                         return;
2219                 }
2220
2221                 // Is it a visible public post?
2222                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2223                         return;
2224                 }
2225
2226                 // is it an entry from a connector? Only add an entry for natively connected networks
2227                 if (!in_array($item["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS, ""])) {
2228                         return;
2229                 }
2230
2231                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2232                         return;
2233                 }
2234
2235                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2236
2237                 if (DBA::isResult($item)) {
2238                         // Preparing public shadow (removing user specific data)
2239                         $item['uid'] = 0;
2240                         unset($item['id']);
2241                         unset($item['parent']);
2242                         unset($item['wall']);
2243                         unset($item['mention']);
2244                         unset($item['origin']);
2245                         unset($item['starred']);
2246                         unset($item['postopts']);
2247                         unset($item['inform']);
2248                         if ($item['uri'] == $item['parent-uri']) {
2249                                 $item['contact-id'] = $item['owner-id'];
2250                         } else {
2251                                 $item['contact-id'] = $item['author-id'];
2252                         }
2253
2254                         $public_shadow = self::insert($item, false, false, true);
2255
2256                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2257                 }
2258         }
2259
2260         /**
2261          * @brief Add a shadow entry for a given item id that is a comment
2262          *
2263          * This function does the same like the function above - but for comments
2264          *
2265          * @param integer $itemid Item ID that should be added
2266          * @throws \Exception
2267          */
2268         public static function addShadowPost($itemid)
2269         {
2270                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2271                 if (!DBA::isResult($item)) {
2272                         return;
2273                 }
2274
2275                 // Is it a toplevel post?
2276                 if ($item['id'] == $item['parent']) {
2277                         self::addShadow($itemid);
2278                         return;
2279                 }
2280
2281                 // Is this a shadow entry?
2282                 if ($item['uid'] == 0) {
2283                         return;
2284                 }
2285
2286                 // Is there a shadow parent?
2287                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2288                         return;
2289                 }
2290
2291                 // Is there already a shadow entry?
2292                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2293                         return;
2294                 }
2295
2296                 // Save "origin" and "parent" state
2297                 $origin = $item['origin'];
2298                 $parent = $item['parent'];
2299
2300                 // Preparing public shadow (removing user specific data)
2301                 $item['uid'] = 0;
2302                 unset($item['id']);
2303                 unset($item['parent']);
2304                 unset($item['wall']);
2305                 unset($item['mention']);
2306                 unset($item['origin']);
2307                 unset($item['starred']);
2308                 unset($item['postopts']);
2309                 unset($item['inform']);
2310                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2311
2312                 $public_shadow = self::insert($item, false, false, true);
2313
2314                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2315
2316                 // If this was a comment to a Diaspora post we don't get our comment back.
2317                 // This means that we have to distribute the comment by ourselves.
2318                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2319                         self::distribute($public_shadow);
2320                 }
2321         }
2322
2323         /**
2324          * Adds a language specification in a "language" element of given $arr.
2325          * Expects "body" element to exist in $arr.
2326          *
2327          * @param $item
2328          * @throws \Text_LanguageDetect_Exception
2329          */
2330         private static function addLanguageToItemArray(&$item)
2331         {
2332                 $naked_body = BBCode::toPlaintext($item['body'], false);
2333
2334                 $ld = new Text_LanguageDetect();
2335                 $ld->setNameMode(2);
2336                 $languages = $ld->detect($naked_body, 3);
2337
2338                 if (is_array($languages)) {
2339                         $item['language'] = json_encode($languages);
2340                 }
2341         }
2342
2343         /**
2344          * @brief Creates an unique guid out of a given uri
2345          *
2346          * @param string $uri uri of an item entry
2347          * @param string $host hostname for the GUID prefix
2348          * @return string unique guid
2349          */
2350         public static function guidFromUri($uri, $host)
2351         {
2352                 // Our regular guid routine is using this kind of prefix as well
2353                 // We have to avoid that different routines could accidentally create the same value
2354                 $parsed = parse_url($uri);
2355
2356                 // We use a hash of the hostname as prefix for the guid
2357                 $guid_prefix = hash("crc32", $host);
2358
2359                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2360                 unset($parsed["scheme"]);
2361
2362                 // Glue it together to be able to make a hash from it
2363                 $host_id = implode("/", $parsed);
2364
2365                 // We could use any hash algorithm since it isn't a security issue
2366                 $host_hash = hash("ripemd128", $host_id);
2367
2368                 return $guid_prefix.$host_hash;
2369         }
2370
2371         /**
2372          * generate an unique URI
2373          *
2374          * @param integer $uid  User id
2375          * @param string  $guid An existing GUID (Otherwise it will be generated)
2376          *
2377          * @return string
2378          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2379          */
2380         public static function newURI($uid, $guid = "")
2381         {
2382                 if ($guid == "") {
2383                         $guid = System::createUUID();
2384                 }
2385
2386                 return self::getApp()->getBaseURL() . '/objects/' . $guid;
2387         }
2388
2389         /**
2390          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2391          *
2392          * This can be used to filter for inactive contacts.
2393          * Only do this for public postings to avoid privacy problems, since poco data is public.
2394          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2395          *
2396          * @param array $arr Contains the just posted item record
2397          * @throws \Exception
2398          */
2399         private static function updateContact($arr)
2400         {
2401                 // Unarchive the author
2402                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2403                 if (DBA::isResult($contact)) {
2404                         Contact::unmarkForArchival($contact);
2405                 }
2406
2407                 // Unarchive the contact if it's not our own contact
2408                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2409                 if (DBA::isResult($contact)) {
2410                         Contact::unmarkForArchival($contact);
2411                 }
2412
2413                 $update = (!$arr['private'] && ((defaults($arr, 'author-link', '') === defaults($arr, 'owner-link', '')) || ($arr["parent-uri"] === $arr["uri"])));
2414
2415                 // Is it a forum? Then we don't care about the rules from above
2416                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2417                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2418                                 $update = true;
2419                         }
2420                 }
2421
2422                 if ($update) {
2423                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2424                                 ['id' => $arr['contact-id']]);
2425                 }
2426                 // Now do the same for the system wide contacts with uid=0
2427                 if (!$arr['private']) {
2428                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2429                                 ['id' => $arr['owner-id']]);
2430
2431                         if ($arr['owner-id'] != $arr['author-id']) {
2432                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2433                                         ['id' => $arr['author-id']]);
2434                         }
2435                 }
2436         }
2437
2438         public static function setHashtags(&$item)
2439         {
2440                 $tags = BBCode::getTags($item["body"]);
2441
2442                 // No hashtags?
2443                 if (!count($tags)) {
2444                         return false;
2445                 }
2446
2447                 // What happens in [code], stays in [code]!
2448                 // escape the # and the [
2449                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2450                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2451                         function ($match) {
2452                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2453                                 $find = ['#', '['];
2454                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2455                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2456                         }, $item["body"]);
2457
2458                 // This sorting is important when there are hashtags that are part of other hashtags
2459                 // Otherwise there could be problems with hashtags like #test and #test2
2460                 rsort($tags);
2461
2462                 $URLSearchString = "^\[\]";
2463
2464                 // All hashtags should point to the home server if "local_tags" is activated
2465                 if (Config::get('system', 'local_tags')) {
2466                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2467                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2468
2469                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2470                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2471                 }
2472
2473                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2474                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2475                         function ($match) {
2476                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2477                         }, $item["body"]);
2478
2479                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2480                         function ($match) {
2481                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2482                         }, $item["body"]);
2483
2484                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2485                         function ($match) {
2486                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2487                         }, $item["body"]);
2488
2489                 // Repair recursive urls
2490                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2491                                 "&num;$2", $item["body"]);
2492
2493                 foreach ($tags as $tag) {
2494                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || $tag[1] == '#') {
2495                                 continue;
2496                         }
2497
2498                         $basetag = str_replace('_',' ',substr($tag,1));
2499                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2500
2501                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2502
2503                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2504                                 if (strlen($item["tag"])) {
2505                                         $item["tag"] = ',' . $item["tag"];
2506                                 }
2507                                 $item["tag"] = $newtag . $item["tag"];
2508                         }
2509                 }
2510
2511                 // Convert back the masked hashtags
2512                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2513
2514                 // Remember! What happens in [code], stays in [code]
2515                 // roleback the # and [
2516                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2517                         function ($match) {
2518                                 // we truly unESCape all sharp and leftsquarebracket
2519                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2520                                 $replace = ['#', '['];
2521                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2522                         }, $item["body"]);
2523         }
2524
2525         /**
2526          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2527          *
2528          * @param int $uid
2529          * @param int $item_id
2530          * @return void true if item was deleted, else false
2531          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2532          * @throws \ImagickException
2533          */
2534         private static function tagDeliver($uid, $item_id)
2535         {
2536                 $mention = false;
2537
2538                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2539                 if (!DBA::isResult($user)) {
2540                         return;
2541                 }
2542
2543                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2544                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2545
2546                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2547                 if (!DBA::isResult($item)) {
2548                         return;
2549                 }
2550
2551                 $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
2552
2553                 /*
2554                  * Diaspora uses their own hardwired link URL in @-tags
2555                  * instead of the one we supply with webfinger
2556                  */
2557                 $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['nickname']);
2558
2559                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2560                 if ($cnt) {
2561                         foreach ($matches as $mtch) {
2562                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2563                                         $mention = true;
2564                                         Logger::log('mention found: ' . $mtch[2]);
2565                                 }
2566                         }
2567                 }
2568
2569                 if (!$mention) {
2570                         if (($community_page || $prvgroup) &&
2571                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2572                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2573                                 // delete it!
2574                                 Logger::log("no-mention top-level post to community or private group. delete.");
2575                                 DBA::delete('item', ['id' => $item_id]);
2576                                 return true;
2577                         }
2578                         return;
2579                 }
2580
2581                 $arr = ['item' => $item, 'user' => $user];
2582
2583                 Hook::callAll('tagged', $arr);
2584
2585                 if (!$community_page && !$prvgroup) {
2586                         return;
2587                 }
2588
2589                 /*
2590                  * tgroup delivery - setup a second delivery chain
2591                  * prevent delivery looping - only proceed
2592                  * if the message originated elsewhere and is a top-level post
2593                  */
2594                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2595                         return;
2596                 }
2597
2598                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2599                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2600                 if (!DBA::isResult($self)) {
2601                         return;
2602                 }
2603
2604                 $owner_id = Contact::getIdForURL($self['url']);
2605
2606                 // also reset all the privacy bits to the forum default permissions
2607
2608                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2609
2610                 $psid = PermissionSet::fetchIDForPost($user);
2611
2612                 $forum_mode = ($prvgroup ? 2 : 1);
2613
2614                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2615                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2616                 self::update($fields, ['id' => $item_id]);
2617
2618                 self::updateThread($item_id);
2619
2620                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2621         }
2622
2623         public static function isRemoteSelf($contact, &$datarray)
2624         {
2625                 $a = \get_app();
2626
2627                 if (!$contact['remote_self']) {
2628                         return false;
2629                 }
2630
2631                 // Prevent the forwarding of posts that are forwarded
2632                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2633                         Logger::log('Already forwarded', Logger::DEBUG);
2634                         return false;
2635                 }
2636
2637                 // Prevent to forward already forwarded posts
2638                 if ($datarray["app"] == $a->getHostName()) {
2639                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2640                         return false;
2641                 }
2642
2643                 // Only forward posts
2644                 if ($datarray["verb"] != ACTIVITY_POST) {
2645                         Logger::log('No post', Logger::DEBUG);
2646                         return false;
2647                 }
2648
2649                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2650                         Logger::log('Not public', Logger::DEBUG);
2651                         return false;
2652                 }
2653
2654                 $datarray2 = $datarray;
2655                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2656                 if ($contact['remote_self'] == 2) {
2657                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2658                                         ['uid' => $contact['uid'], 'self' => true]);
2659                         if (DBA::isResult($self)) {
2660                                 $datarray['contact-id'] = $self["id"];
2661
2662                                 $datarray['owner-name'] = $self["name"];
2663                                 $datarray['owner-link'] = $self["url"];
2664                                 $datarray['owner-avatar'] = $self["thumb"];
2665
2666                                 $datarray['author-name']   = $datarray['owner-name'];
2667                                 $datarray['author-link']   = $datarray['owner-link'];
2668                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2669
2670                                 unset($datarray['edited']);
2671
2672                                 unset($datarray['network']);
2673                                 unset($datarray['owner-id']);
2674                                 unset($datarray['author-id']);
2675                         }
2676
2677                         if ($contact['network'] != Protocol::FEED) {
2678                                 $datarray["guid"] = System::createUUID();
2679                                 unset($datarray["plink"]);
2680                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2681                                 $datarray["parent-uri"] = $datarray["uri"];
2682                                 $datarray["thr-parent"] = $datarray["uri"];
2683                                 $datarray["extid"] = Protocol::DFRN;
2684                                 $urlpart = parse_url($datarray2['author-link']);
2685                                 $datarray["app"] = $urlpart["host"];
2686                         } else {
2687                                 $datarray['private'] = 0;
2688                         }
2689                 }
2690
2691                 if ($contact['network'] != Protocol::FEED) {
2692                         // Store the original post
2693                         $result = self::insert($datarray2, false, false);
2694                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2695                 } else {
2696                         $datarray["app"] = "Feed";
2697                         $result = true;
2698                 }
2699
2700                 // Trigger automatic reactions for addons
2701                 $datarray['api_source'] = true;
2702
2703                 // We have to tell the hooks who we are - this really should be improved
2704                 $_SESSION["authenticated"] = true;
2705                 $_SESSION["uid"] = $contact['uid'];
2706
2707                 return $result;
2708         }
2709
2710         /**
2711          *
2712          * @param string $s
2713          * @param int    $uid
2714          * @param array  $item
2715          * @param int    $cid
2716          * @return string
2717          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2718          * @throws \ImagickException
2719          */
2720         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2721         {
2722                 if (Config::get('system', 'disable_embedded')) {
2723                         return $s;
2724                 }
2725
2726                 Logger::log('check for photos', Logger::DEBUG);
2727                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2728
2729                 $orig_body = $s;
2730                 $new_body = '';
2731
2732                 $img_start = strpos($orig_body, '[img');
2733                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2734                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2735
2736                 while (($img_st_close !== false) && ($img_len !== false)) {
2737                         $img_st_close++; // make it point to AFTER the closing bracket
2738                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2739
2740                         Logger::log('found photo ' . $image, Logger::DEBUG);
2741
2742                         if (stristr($image, $site . '/photo/')) {
2743                                 // Only embed locally hosted photos
2744                                 $replace = false;
2745                                 $i = basename($image);
2746                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2747                                 $x = strpos($i, '-');
2748
2749                                 if ($x) {
2750                                         $res = substr($i, $x + 1);
2751                                         $i = substr($i, 0, $x);
2752                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2753                                         if (DBA::isResult($photo)) {
2754                                                 /*
2755                                                  * Check to see if we should replace this photo link with an embedded image
2756                                                  * 1. No need to do so if the photo is public
2757                                                  * 2. If there's a contact-id provided, see if they're in the access list
2758                                                  *    for the photo. If so, embed it.
2759                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2760                                                  *    permissions, regardless of order but first check to see if they're an exact
2761                                                  *    match to save some processing overhead.
2762                                                  */
2763                                                 if (self::hasPermissions($photo)) {
2764                                                         if ($cid) {
2765                                                                 $recips = self::enumeratePermissions($photo);
2766                                                                 if (in_array($cid, $recips)) {
2767                                                                         $replace = true;
2768                                                                 }
2769                                                         } elseif ($item) {
2770                                                                 if (self::samePermissions($item, $photo)) {
2771                                                                         $replace = true;
2772                                                                 }
2773                                                         }
2774                                                 }
2775                                                 if ($replace) {
2776                                                         $photo_img = Photo::getImageForPhoto($photo);
2777                                                         // If a custom width and height were specified, apply before embedding
2778                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2779                                                                 Logger::log('scaling photo', Logger::DEBUG);
2780
2781                                                                 $width = intval($match[1]);
2782                                                                 $height = intval($match[2]);
2783
2784                                                                 $photo_img->scaleDown(max($width, $height));
2785                                                         }
2786
2787                                                         $data = $photo_img->asString();
2788                                                         $type = $photo_img->getType();
2789
2790                                                         Logger::log('replacing photo', Logger::DEBUG);
2791                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2792                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2793                                                 }
2794                                         }
2795                                 }
2796                         }
2797
2798                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2799                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2800                         if ($orig_body === false) {
2801                                 $orig_body = '';
2802                         }
2803
2804                         $img_start = strpos($orig_body, '[img');
2805                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2806                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2807                 }
2808
2809                 $new_body = $new_body . $orig_body;
2810
2811                 return $new_body;
2812         }
2813
2814         private static function hasPermissions($obj)
2815         {
2816                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2817                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2818         }
2819
2820         private static function samePermissions($obj1, $obj2)
2821         {
2822                 // first part is easy. Check that these are exactly the same.
2823                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2824                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2825                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2826                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2827                         return true;
2828                 }
2829
2830                 // This is harder. Parse all the permissions and compare the resulting set.
2831                 $recipients1 = self::enumeratePermissions($obj1);
2832                 $recipients2 = self::enumeratePermissions($obj2);
2833                 sort($recipients1);
2834                 sort($recipients2);
2835
2836                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2837                 return ($recipients1 == $recipients2);
2838         }
2839
2840         // returns an array of contact-ids that are allowed to see this object
2841         public static function enumeratePermissions($obj)
2842         {
2843                 $allow_people = expand_acl($obj['allow_cid']);
2844                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2845                 $deny_people  = expand_acl($obj['deny_cid']);
2846                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2847                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2848                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2849                 $recipients   = array_diff($recipients, $deny);
2850                 return $recipients;
2851         }
2852
2853         public static function getFeedTags($item)
2854         {
2855                 $ret = [];
2856                 $matches = false;
2857                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2858                 if ($cnt) {
2859                         for ($x = 0; $x < $cnt; $x ++) {
2860                                 if ($matches[1][$x]) {
2861                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2862                                 }
2863                         }
2864                 }
2865                 $matches = false;
2866                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2867                 if ($cnt) {
2868                         for ($x = 0; $x < $cnt; $x ++) {
2869                                 if ($matches[1][$x]) {
2870                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2871                                 }
2872                         }
2873                 }
2874                 return $ret;
2875         }
2876
2877         public static function expire($uid, $days, $network = "", $force = false)
2878         {
2879                 if (!$uid || ($days < 1)) {
2880                         return;
2881                 }
2882
2883                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2884                         $uid, GRAVITY_PARENT];
2885
2886                 /*
2887                  * $expire_network_only = save your own wall posts
2888                  * and just expire conversations started by others
2889                  */
2890                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
2891
2892                 if ($expire_network_only) {
2893                         $condition[0] .= " AND NOT `wall`";
2894                 }
2895
2896                 if ($network != "") {
2897                         $condition[0] .= " AND `network` = ?";
2898                         $condition[] = $network;
2899
2900                         /*
2901                          * There is an index "uid_network_received" but not "uid_network_created"
2902                          * This avoids the creation of another index just for one purpose.
2903                          * And it doesn't really matter wether to look at "received" or "created"
2904                          */
2905                         $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2906                         $condition[] = $days;
2907                 } else {
2908                         $condition[0] .= " AND `created` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2909                         $condition[] = $days;
2910                 }
2911
2912                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
2913
2914                 if (!DBA::isResult($items)) {
2915                         return;
2916                 }
2917
2918                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
2919
2920                 // Forcing expiring of items - but not notes and marked items
2921                 if ($force) {
2922                         $expire_items = true;
2923                 }
2924
2925                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
2926                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
2927                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
2928
2929                 $expired = 0;
2930
2931                 while ($item = Item::fetch($items)) {
2932                         // don't expire filed items
2933
2934                         if (strpos($item['file'], '[') !== false) {
2935                                 continue;
2936                         }
2937
2938                         // Only expire posts, not photos and photo comments
2939
2940                         if (!$expire_photos && strlen($item['resource-id'])) {
2941                                 continue;
2942                         } elseif (!$expire_starred && intval($item['starred'])) {
2943                                 continue;
2944                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
2945                                 continue;
2946                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
2947                                 continue;
2948                         }
2949
2950                         self::deleteById($item['id'], PRIORITY_LOW);
2951
2952                         ++$expired;
2953                 }
2954                 DBA::close($items);
2955                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2956         }
2957
2958         public static function firstPostDate($uid, $wall = false)
2959         {
2960                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2961                 $params = ['order' => ['created' => false]];
2962                 $thread = DBA::selectFirst('thread', ['created'], $condition, $params);
2963                 if (DBA::isResult($thread)) {
2964                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2965                 }
2966                 return false;
2967         }
2968
2969         /**
2970          * @brief add/remove activity to an item
2971          *
2972          * Toggle activities as like,dislike,attend of an item
2973          *
2974          * @param string $item_id
2975          * @param string $verb
2976          *            Activity verb. One of
2977          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2978          *            attendno, unattendno, attendmaybe, unattendmaybe
2979          * @return bool
2980          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2981          * @throws \ImagickException
2982          * @hook  'post_local_end'
2983          *            array $arr
2984          *            'post_id' => ID of posted item
2985          */
2986         public static function performLike($item_id, $verb)
2987         {
2988                 if (!local_user() && !remote_user()) {
2989                         return false;
2990                 }
2991
2992                 switch ($verb) {
2993                         case 'like':
2994                         case 'unlike':
2995                                 $activity = ACTIVITY_LIKE;
2996                                 break;
2997                         case 'dislike':
2998                         case 'undislike':
2999                                 $activity = ACTIVITY_DISLIKE;
3000                                 break;
3001                         case 'attendyes':
3002                         case 'unattendyes':
3003                                 $activity = ACTIVITY_ATTEND;
3004                                 break;
3005                         case 'attendno':
3006                         case 'unattendno':
3007                                 $activity = ACTIVITY_ATTENDNO;
3008                                 break;
3009                         case 'attendmaybe':
3010                         case 'unattendmaybe':
3011                                 $activity = ACTIVITY_ATTENDMAYBE;
3012                                 break;
3013                         default:
3014                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3015                                 return false;
3016                 }
3017
3018                 // Enable activity toggling instead of on/off
3019                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
3020
3021                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3022
3023                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3024                 if (!DBA::isResult($item)) {
3025                         Logger::log('like: unknown item ' . $item_id);
3026                         return false;
3027                 }
3028
3029                 $item_uri = $item['uri'];
3030
3031                 $uid = $item['uid'];
3032                 if (($uid == 0) && local_user()) {
3033                         $uid = local_user();
3034                 }
3035
3036                 if (!Security::canWriteToUserWall($uid)) {
3037                         Logger::log('like: unable to write on wall ' . $uid);
3038                         return false;
3039                 }
3040
3041                 // Retrieves the local post owner
3042                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3043                 if (!DBA::isResult($owner_self_contact)) {
3044                         Logger::log('like: unknown owner ' . $uid);
3045                         return false;
3046                 }
3047
3048                 // Retrieve the current logged in user's public contact
3049                 $author_id = public_contact();
3050
3051                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3052                 if (!DBA::isResult($author_contact)) {
3053                         Logger::log('like: unknown author ' . $author_id);
3054                         return false;
3055                 }
3056
3057                 // Contact-id is the uid-dependant author contact
3058                 if (local_user() == $uid) {
3059                         $item_contact_id = $owner_self_contact['id'];
3060                 } else {
3061                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3062                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3063                         if (!DBA::isResult($item_contact)) {
3064                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3065                                 return false;
3066                         }
3067                 }
3068
3069                 // Look for an existing verb row
3070                 // event participation are essentially radio toggles. If you make a subsequent choice,
3071                 // we need to eradicate your first choice.
3072                 if ($event_verb_flag) {
3073                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
3074
3075                         // Translate to the index based activity index
3076                         $activities = [];
3077                         foreach ($verbs as $verb) {
3078                                 $activities[] = self::activityToIndex($verb);
3079                         }
3080                 } else {
3081                         $activities = self::activityToIndex($activity);
3082                 }
3083
3084                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3085                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3086
3087                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3088
3089                 // If it exists, mark it as deleted
3090                 if (DBA::isResult($like_item)) {
3091                         self::deleteById($like_item['id']);
3092
3093                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3094                                 return true;
3095                         }
3096                 }
3097
3098                 // Verb is "un-something", just trying to delete existing entries
3099                 if (strpos($verb, 'un') === 0) {
3100                         return true;
3101                 }
3102
3103                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE;
3104
3105                 $new_item = [
3106                         'guid'          => System::createUUID(),
3107                         'uri'           => self::newURI($item['uid']),
3108                         'uid'           => $item['uid'],
3109                         'contact-id'    => $item_contact_id,
3110                         'wall'          => $item['wall'],
3111                         'origin'        => 1,
3112                         'network'       => Protocol::DFRN,
3113                         'gravity'       => GRAVITY_ACTIVITY,
3114                         'parent'        => $item['id'],
3115                         'parent-uri'    => $item['uri'],
3116                         'thr-parent'    => $item['uri'],
3117                         'owner-id'      => $author_id,
3118                         'author-id'     => $author_id,
3119                         'body'          => $activity,
3120                         'verb'          => $activity,
3121                         'object-type'   => $objtype,
3122                         'allow_cid'     => $item['allow_cid'],
3123                         'allow_gid'     => $item['allow_gid'],
3124                         'deny_cid'      => $item['deny_cid'],
3125                         'deny_gid'      => $item['deny_gid'],
3126                         'visible'       => 1,
3127                         'unseen'        => 1,
3128                 ];
3129
3130                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3131                 if (!empty($signed)) {
3132                         $new_item['diaspora_signed_text'] = json_encode($signed);
3133                 }
3134
3135                 $new_item_id = self::insert($new_item);
3136
3137                 // If the parent item isn't visible then set it to visible
3138                 if (!$item['visible']) {
3139                         self::update(['visible' => true], ['id' => $item['id']]);
3140                 }
3141
3142                 $new_item['id'] = $new_item_id;
3143
3144                 Hook::callAll('post_local_end', $new_item);
3145
3146                 return true;
3147         }
3148
3149         private static function addThread($itemid, $onlyshadow = false)
3150         {
3151                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3152                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3153                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3154                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3155                 $item = self::selectFirst($fields, $condition);
3156
3157                 if (!DBA::isResult($item)) {
3158                         return;
3159                 }
3160
3161                 $item['iid'] = $itemid;
3162
3163                 if (!$onlyshadow) {
3164                         $result = DBA::insert('thread', $item);
3165
3166                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3167                 }
3168         }
3169
3170         private static function updateThread($itemid, $setmention = false)
3171         {
3172                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3173                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3174                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3175                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3176
3177                 $item = self::selectFirst($fields, $condition);
3178                 if (!DBA::isResult($item)) {
3179                         return;
3180                 }
3181
3182                 if ($setmention) {
3183                         $item["mention"] = 1;
3184                 }
3185
3186                 $fields = [];
3187
3188                 foreach ($item as $field => $data) {
3189                         if (!in_array($field, ["guid"])) {
3190                                 $fields[$field] = $data;
3191                         }
3192                 }
3193
3194                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3195
3196                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3197         }
3198
3199         private static function deleteThread($itemid, $itemuri = "")
3200         {
3201                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3202                 if (!DBA::isResult($item)) {
3203                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3204                         return;
3205                 }
3206
3207                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3208
3209                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3210
3211                 if ($itemuri != "") {
3212                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3213                         if (!self::exists($condition)) {
3214                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3215                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3216                         }
3217                 }
3218         }
3219
3220         public static function getPermissionsSQLByUserId($owner_id, $remote_verified = false, $groups = null, $remote_cid = null)
3221         {
3222                 $local_user = local_user();
3223                 $remote_user = remote_user();
3224
3225                 /*
3226                  * Construct permissions
3227                  *
3228                  * default permissions - anonymous user
3229                  */
3230                 $sql = " AND NOT `item`.`private`";
3231
3232                 // Profile owner - everything is visible
3233                 if ($local_user && ($local_user == $owner_id)) {
3234                         $sql = '';
3235                 } elseif ($remote_user) {
3236                         /*
3237                          * Authenticated visitor. Unless pre-verified,
3238                          * check that the contact belongs to this $owner_id
3239                          * and load the groups the visitor belongs to.
3240                          * If pre-verified, the caller is expected to have already
3241                          * done this and passed the groups into this function.
3242                          */
3243                         $set = PermissionSet::get($owner_id, $remote_cid, $groups);
3244
3245                         if (!empty($set)) {
3246                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3247                         } else {
3248                                 $sql_set = '';
3249                         }
3250
3251                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3252                 }
3253
3254                 return $sql;
3255         }
3256
3257         /**
3258          * get translated item type
3259          *
3260          * @param $item
3261          * @return string
3262          */
3263         public static function postType($item)
3264         {
3265                 if (!empty($item['event-id'])) {
3266                         return L10n::t('event');
3267                 } elseif (!empty($item['resource-id'])) {
3268                         return L10n::t('photo');
3269                 } elseif (!empty($item['verb']) && $item['verb'] !== ACTIVITY_POST) {
3270                         return L10n::t('activity');
3271                 } elseif ($item['id'] != $item['parent']) {
3272                         return L10n::t('comment');
3273                 }
3274
3275                 return L10n::t('post');
3276         }
3277
3278         /**
3279          * Sets the "rendered-html" field of the provided item
3280          *
3281          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3282          *
3283          * @param array $item
3284          * @param bool  $update
3285          *
3286          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3287          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3288          */
3289         public static function putInCache(&$item, $update = false)
3290         {
3291                 $body = $item["body"];
3292
3293                 $rendered_hash = defaults($item, 'rendered-hash', '');
3294                 $rendered_html = defaults($item, 'rendered-html', '');
3295
3296                 if ($rendered_hash == ''
3297                         || $rendered_html == ""
3298                         || $rendered_hash != hash("md5", $item["body"])
3299                         || Config::get("system", "ignore_cache")
3300                 ) {
3301                         $a = self::getApp();
3302                         redir_private_images($a, $item);
3303
3304                         $item["rendered-html"] = prepare_text($item["body"]);
3305                         $item["rendered-hash"] = hash("md5", $item["body"]);
3306
3307                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3308                         Hook::callAll('put_item_in_cache', $hook_data);
3309                         $item['rendered-html'] = $hook_data['rendered-html'];
3310                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3311                         unset($hook_data);
3312
3313                         // Force an update if the generated values differ from the existing ones
3314                         if ($rendered_hash != $item["rendered-hash"]) {
3315                                 $update = true;
3316                         }
3317
3318                         // Only compare the HTML when we forcefully ignore the cache
3319                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3320                                 $update = true;
3321                         }
3322
3323                         if ($update && !empty($item["id"])) {
3324                                 self::update(
3325                                         [
3326                                                 'rendered-html' => $item["rendered-html"],
3327                                                 'rendered-hash' => $item["rendered-hash"]
3328                                         ],
3329                                         ['id' => $item["id"]]
3330                                 );
3331                         }
3332                 }
3333
3334                 $item["body"] = $body;
3335         }
3336
3337         /**
3338          * @brief Given an item array, convert the body element from bbcode to html and add smilie icons.
3339          * If attach is true, also add icons for item attachments.
3340          *
3341          * @param array   $item
3342          * @param boolean $attach
3343          * @param boolean $is_preview
3344          * @return string item body html
3345          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3346          * @throws \ImagickException
3347          * @hook  prepare_body_init item array before any work
3348          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3349          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3350          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3351          */
3352         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3353         {
3354                 $a = self::getApp();
3355                 Hook::callAll('prepare_body_init', $item);
3356
3357                 // In order to provide theme developers more possibilities, event items
3358                 // are treated differently.
3359                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT && isset($item['event-id'])) {
3360                         $ev = Event::getItemHTML($item);
3361                         return $ev;
3362                 }
3363
3364                 $tags = Term::populateTagsFromItem($item);
3365
3366                 $item['tags'] = $tags['tags'];
3367                 $item['hashtags'] = $tags['hashtags'];
3368                 $item['mentions'] = $tags['mentions'];
3369
3370                 // Compile eventual content filter reasons
3371                 $filter_reasons = [];
3372                 if (!$is_preview && public_contact() != $item['author-id']) {
3373                         if (!empty($item['content-warning']) && (!local_user() || !PConfig::get(local_user(), 'system', 'disable_cw', false))) {
3374                                 $filter_reasons[] = L10n::t('Content warning: %s', $item['content-warning']);
3375                         }
3376
3377                         $hook_data = [
3378                                 'item' => $item,
3379                                 'filter_reasons' => $filter_reasons
3380                         ];
3381                         Hook::callAll('prepare_body_content_filter', $hook_data);
3382                         $filter_reasons = $hook_data['filter_reasons'];
3383                         unset($hook_data);
3384                 }
3385
3386                 // Update the cached values if there is no "zrl=..." on the links.
3387                 $update = (!local_user() && !remote_user() && ($item["uid"] == 0));
3388
3389                 // Or update it if the current viewer is the intented viewer.
3390                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3391                         $update = true;
3392                 }
3393
3394                 self::putInCache($item, $update);
3395                 $s = $item["rendered-html"];
3396
3397                 $hook_data = [
3398                         'item' => $item,
3399                         'html' => $s,
3400                         'preview' => $is_preview,
3401                         'filter_reasons' => $filter_reasons
3402                 ];
3403                 Hook::callAll('prepare_body', $hook_data);
3404                 $s = $hook_data['html'];
3405                 unset($hook_data);
3406
3407                 if (!$attach) {
3408                         // Replace the blockquotes with quotes that are used in mails.
3409                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3410                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3411                         return $s;
3412                 }
3413
3414                 $as = '';
3415                 $vhead = false;
3416                 $matches = [];
3417                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3418                 foreach ($matches as $mtch) {
3419                         $mime = $mtch[3];
3420
3421                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3422
3423                         if (strpos($mime, 'video') !== false) {
3424                                 if (!$vhead) {
3425                                         $vhead = true;
3426                                         $a->page['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3427                                 }
3428
3429                                 $url_parts = explode('/', $the_url);
3430                                 $id = end($url_parts);
3431                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3432                                         '$video' => [
3433                                                 'id'     => $id,
3434                                                 'title'  => L10n::t('View Video'),
3435                                                 'src'    => $the_url,
3436                                                 'mime'   => $mime,
3437                                         ],
3438                                 ]);
3439                         }
3440
3441                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3442                         if ($filetype) {
3443                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3444                                 $filesubtype = str_replace('.', '-', $filesubtype);
3445                         } else {
3446                                 $filetype = 'unkn';
3447                                 $filesubtype = 'unkn';
3448                         }
3449
3450                         $title = Strings::escapeHtml(trim(defaults($mtch, 4, $mtch[1])));
3451                         $title .= ' ' . $mtch[2] . ' ' . L10n::t('bytes');
3452
3453                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3454                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3455                 }
3456
3457                 if ($as != '') {
3458                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3459                 }
3460
3461                 // Map.
3462                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3463                         $x = Map::byCoordinates(trim($item['coord']));
3464                         if ($x) {
3465                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3466                         }
3467                 }
3468
3469
3470                 // Look for spoiler.
3471                 $spoilersearch = '<blockquote class="spoiler">';
3472
3473                 // Remove line breaks before the spoiler.
3474                 while ((strpos($s, "\n" . $spoilersearch) !== false)) {
3475                         $s = str_replace("\n" . $spoilersearch, $spoilersearch, $s);
3476                 }
3477                 while ((strpos($s, "<br />" . $spoilersearch) !== false)) {
3478                         $s = str_replace("<br />" . $spoilersearch, $spoilersearch, $s);
3479                 }
3480
3481                 while ((strpos($s, $spoilersearch) !== false)) {
3482                         $pos = strpos($s, $spoilersearch);
3483                         $rnd = Strings::getRandomHex(8);
3484                         $spoilerreplace = '<br /> <span id="spoiler-wrap-' . $rnd . '" class="spoiler-wrap fakelink" onclick="openClose(\'spoiler-' . $rnd . '\');">' . L10n::t('Click to open/close') . '</span>'.
3485                                                 '<blockquote class="spoiler" id="spoiler-' . $rnd . '" style="display: none;">';
3486                         $s = substr($s, 0, $pos) . $spoilerreplace . substr($s, $pos + strlen($spoilersearch));
3487                 }
3488
3489                 // Look for quote with author.
3490                 $authorsearch = '<blockquote class="author">';
3491
3492                 while ((strpos($s, $authorsearch) !== false)) {
3493                         $pos = strpos($s, $authorsearch);
3494                         $rnd = Strings::getRandomHex(8);
3495                         $authorreplace = '<br /> <span id="author-wrap-' . $rnd . '" class="author-wrap fakelink" onclick="openClose(\'author-' . $rnd . '\');">' . L10n::t('Click to open/close') . '</span>'.
3496                                                 '<blockquote class="author" id="author-' . $rnd . '" style="display: block;">';
3497                         $s = substr($s, 0, $pos) . $authorreplace . substr($s, $pos + strlen($authorsearch));
3498                 }
3499
3500                 // Replace friendica image url size with theme preference.
3501                 if (!empty($a->theme_info['item_image_size'])) {
3502                         $ps = $a->theme_info['item_image_size'];
3503                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3504                 }
3505
3506                 $s = HTML::applyContentFilter($s, $filter_reasons);
3507
3508                 $hook_data = ['item' => $item, 'html' => $s];
3509                 Hook::callAll('prepare_body_final', $hook_data);
3510
3511                 return $hook_data['html'];
3512         }
3513
3514         /**
3515          * get private link for item
3516          *
3517          * @param array $item
3518          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3519          * @throws \Exception
3520          */
3521         public static function getPlink($item)
3522         {
3523                 $a = self::getApp();
3524
3525                 if ($a->user['nickname'] != "") {
3526                         $ret = [
3527                                 'href' => "display/" . $item['guid'],
3528                                 'orig' => "display/" . $item['guid'],
3529                                 'title' => L10n::t('View on separate page'),
3530                                 'orig_title' => L10n::t('view on separate page'),
3531                         ];
3532
3533                         if (!empty($item['plink'])) {
3534                                 $ret["href"] = $a->removeBaseURL($item['plink']);
3535                                 $ret["title"] = L10n::t('link to source');
3536                         }
3537
3538                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3539                         $ret = [
3540                                 'href' => $item['plink'],
3541                                 'orig' => $item['plink'],
3542                                 'title' => L10n::t('link to source'),
3543                         ];
3544                 } else {
3545                         $ret = [];
3546                 }
3547
3548                 return $ret;
3549         }
3550
3551         /**
3552          * Is the given item array a post that is sent as starting post to a forum?
3553          *
3554          * @param array $item
3555          * @param array $owner
3556          *
3557          * @return boolean "true" when it is a forum post
3558          */
3559         public static function isForumPost(array $item, array $owner = [])
3560         {
3561                 if (empty($owner)) {
3562                         $owner = User::getOwnerDataById($item['uid']);
3563                         if (empty($owner)) {
3564                                 return false;
3565                         }
3566                 }
3567
3568                 if (($item['author-id'] == $item['owner-id']) ||
3569                         ($owner['id'] == $item['contact-id']) ||
3570                         ($item['uri'] != $item['parent-uri']) ||
3571                         $item['origin']) {
3572                         return false;
3573                 }
3574
3575                 return Contact::isForum($item['contact-id']);
3576         }
3577 }