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