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                         $item['gravity'] = GRAVITY_COMMENT;
1318                 } elseif (activity_match($item['verb'], ACTIVITY_FOLLOW)) {
1319                         $item['gravity'] = GRAVITY_ACTIVITY;
1320                 } else {
1321                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1322                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1323                 }
1324
1325                 $uid = intval($item['uid']);
1326
1327                 // check for create date and expire time
1328                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1329
1330                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1331                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1332                         $expire_interval = $user['expire'];
1333                 }
1334
1335                 if (($expire_interval > 0) && !empty($item['created'])) {
1336                         $expire_date = time() - ($expire_interval * 86400);
1337                         $created_date = strtotime($item['created']);
1338                         if ($created_date < $expire_date) {
1339                                 Logger::notice('Item created before expiration interval.', [
1340                                         'created' => date('c', $created_date),
1341                                         'expired' => date('c', $expire_date),
1342                                         '$item' => $item
1343                                 ]);
1344                                 return 0;
1345                         }
1346                 }
1347
1348                 /*
1349                  * Do we already have this item?
1350                  * We have to check several networks since Friendica posts could be repeated
1351                  * via OStatus (maybe Diasporsa as well)
1352                  */
1353                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS, ""])) {
1354                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1355                                 trim($item['uri']), $item['uid'],
1356                                 Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1357                         $existing = self::selectFirst(['id', 'network'], $condition);
1358                         if (DBA::isResult($existing)) {
1359                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1360                                 if ($uid != 0) {
1361                                         Logger::notice('Item already existed for user', [
1362                                                 'uri' => $item['uri'],
1363                                                 'uid' => $uid,
1364                                                 'network' => $item['network'],
1365                                                 'existing_id' => $existing["id"],
1366                                                 'existing_network' => $existing["network"]
1367                                         ]);
1368                                 }
1369
1370                                 return $existing["id"];
1371                         }
1372                 }
1373
1374                 $item['wall']          = intval(defaults($item, 'wall', 0));
1375                 $item['extid']         = trim(defaults($item, 'extid', ''));
1376                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1377                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1378                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1379                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1380                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1381                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1382                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1383                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1384                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1385                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1386                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1387                 $item['title']         = trim(defaults($item, 'title', ''));
1388                 $item['location']      = trim(defaults($item, 'location', ''));
1389                 $item['coord']         = trim(defaults($item, 'coord', ''));
1390                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1391                 $item['deleted']       = 0;
1392                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1393                 $item['post-type']     = defaults($item, 'post-type', self::PT_ARTICLE);
1394                 $item['verb']          = trim(defaults($item, 'verb', ''));
1395                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1396                 $item['object']        = trim(defaults($item, 'object', ''));
1397                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1398                 $item['target']        = trim(defaults($item, 'target', ''));
1399                 $item['plink']         = trim(defaults($item, 'plink', ''));
1400                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1401                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1402                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1403                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1404                 $item['private']       = intval(defaults($item, 'private', 0));
1405                 $item['body']          = trim(defaults($item, 'body', ''));
1406                 $item['tag']           = trim(defaults($item, 'tag', ''));
1407                 $item['attach']        = trim(defaults($item, 'attach', ''));
1408                 $item['app']           = trim(defaults($item, 'app', ''));
1409                 $item['origin']        = intval(defaults($item, 'origin', 0));
1410                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1411                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1412                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1413                 $item['inform']        = trim(defaults($item, 'inform', ''));
1414                 $item['file']          = trim(defaults($item, 'file', ''));
1415
1416                 // When there is no content then we don't post it
1417                 if ($item['body'].$item['title'] == '') {
1418                         Logger::notice('No body, no title.');
1419                         return 0;
1420                 }
1421
1422                 self::addLanguageToItemArray($item);
1423
1424                 // Items cannot be stored before they happen ...
1425                 if ($item['created'] > DateTimeFormat::utcNow()) {
1426                         $item['created'] = DateTimeFormat::utcNow();
1427                 }
1428
1429                 // We haven't invented time travel by now.
1430                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1431                         $item['edited'] = DateTimeFormat::utcNow();
1432                 }
1433
1434                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1435
1436                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1437                 $item["contact-id"] = self::contactId($item);
1438
1439                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1440                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1441
1442                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1443
1444                 if (Contact::isBlocked($item["author-id"])) {
1445                         Logger::notice('Author is blocked node-wide', ['author-link' => $item["author-link"], 'item-uri' => $item["uri"]]);
1446                         return 0;
1447                 }
1448
1449                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1450                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1451
1452                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1453
1454                 if (Contact::isBlocked($item["owner-id"])) {
1455                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item["owner-link"], 'item-uri' => $item["uri"]]);
1456                         return 0;
1457                 }
1458
1459                 if ($item['network'] == Protocol::PHANTOM) {
1460                         $item['network'] = Protocol::DFRN;
1461                         Logger::notice('Missing network, setting to {network}.', [
1462                                 'uri' => $item["uri"],
1463                                 'network' => $item['network'],
1464                                 'callstack' => System::callstack()
1465                         ]);
1466                 }
1467
1468                 // Checking if there is already an item with the same guid
1469                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1470                 if (self::exists($condition)) {
1471                         Logger::notice('Found already existing item', [
1472                                 'guid' => $item['guid'],
1473                                 'uid' => $item['uid'],
1474                                 'network' => $item['network']
1475                         ]);
1476                         return 0;
1477                 }
1478
1479                 if ($item['verb'] == ACTIVITY_FOLLOW) {
1480                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1481                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1482                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1483                                 return 0;
1484                         }
1485
1486                         $condition = ['verb' => ACTIVITY_FOLLOW, 'uid' => $item['uid'],
1487                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1488                         if (self::exists($condition)) {
1489                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1490                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1491                                 return 0;
1492                         }
1493                 }
1494
1495                 // Check for hashtags in the body and repair or add hashtag links
1496                 self::setHashtags($item);
1497
1498                 $item['thr-parent'] = $item['parent-uri'];
1499
1500                 $notify_type = '';
1501                 $allow_cid = '';
1502                 $allow_gid = '';
1503                 $deny_cid  = '';
1504                 $deny_gid  = '';
1505
1506                 if ($item['parent-uri'] === $item['uri']) {
1507                         $parent_id = 0;
1508                         $parent_deleted = 0;
1509                         $allow_cid = $item['allow_cid'];
1510                         $allow_gid = $item['allow_gid'];
1511                         $deny_cid  = $item['deny_cid'];
1512                         $deny_gid  = $item['deny_gid'];
1513                         $notify_type = 'wall-new';
1514                 } else {
1515                         // find the parent and snarf the item id and ACLs
1516                         // and anything else we need to inherit
1517
1518                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1519                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1520                                 'wall', 'private', 'forum_mode', 'origin'];
1521                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1522                         $params = ['order' => ['id' => false]];
1523                         $parent = self::selectFirst($fields, $condition, $params);
1524
1525                         if (DBA::isResult($parent)) {
1526                                 // is the new message multi-level threaded?
1527                                 // even though we don't support it now, preserve the info
1528                                 // and re-attach to the conversation parent.
1529
1530                                 if ($parent['uri'] != $parent['parent-uri']) {
1531                                         $item['parent-uri'] = $parent['parent-uri'];
1532
1533                                         $condition = ['uri' => $item['parent-uri'],
1534                                                 'parent-uri' => $item['parent-uri'],
1535                                                 'uid' => $item['uid']];
1536                                         $params = ['order' => ['id' => false]];
1537                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1538
1539                                         if (DBA::isResult($toplevel_parent)) {
1540                                                 $parent = $toplevel_parent;
1541                                         }
1542                                 }
1543
1544                                 $parent_id      = $parent['id'];
1545                                 $parent_deleted = $parent['deleted'];
1546                                 $allow_cid      = $parent['allow_cid'];
1547                                 $allow_gid      = $parent['allow_gid'];
1548                                 $deny_cid       = $parent['deny_cid'];
1549                                 $deny_gid       = $parent['deny_gid'];
1550                                 $item['wall']    = $parent['wall'];
1551                                 $notify_type    = 'comment-new';
1552
1553                                 /*
1554                                  * If the parent is private, force privacy for the entire conversation
1555                                  * This differs from the above settings as it subtly allows comments from
1556                                  * email correspondents to be private even if the overall thread is not.
1557                                  */
1558                                 if ($parent['private']) {
1559                                         $item['private'] = $parent['private'];
1560                                 }
1561
1562                                 /*
1563                                  * Edge case. We host a public forum that was originally posted to privately.
1564                                  * The original author commented, but as this is a comment, the permissions
1565                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1566                                  */
1567                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1568                                         $item['private'] = 0;
1569                                 }
1570
1571                                 // If its a post that originated here then tag the thread as "mention"
1572                                 if ($item['origin'] && $item['uid']) {
1573                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1574                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1575                                 }
1576                         } else {
1577                                 /*
1578                                  * Allow one to see reply tweets from status.net even when
1579                                  * we don't have or can't see the original post.
1580                                  */
1581                                 if ($force_parent) {
1582                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1583                                         $parent_id = 0;
1584                                         $item['parent-uri'] = $item['uri'];
1585                                         $item['gravity'] = GRAVITY_PARENT;
1586                                 } else {
1587                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1588                                         return 0;
1589                                 }
1590
1591                                 $parent_deleted = 0;
1592                         }
1593                 }
1594
1595                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1596                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1597
1598                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1599                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1600                 if (self::exists($condition)) {
1601                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1602                         return 0;
1603                 }
1604
1605                 // On Friendica and Diaspora the GUID is unique
1606                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1607                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1608                         if (self::exists($condition)) {
1609                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1610                                 return 0;
1611                         }
1612                 } else {
1613                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1614                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1615                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1616                         if (self::exists($condition)) {
1617                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1618                                 return 0;
1619                         }
1620                 }
1621
1622                 // Is this item available in the global items (with uid=0)?
1623                 if ($item["uid"] == 0) {
1624                         $item["global"] = true;
1625
1626                         // Set the global flag on all items if this was a global item entry
1627                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1628                 } else {
1629                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1630                 }
1631
1632                 // ACL settings
1633                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1634                         $private = 1;
1635                 } else {
1636                         $private = $item['private'];
1637                 }
1638
1639                 $item["allow_cid"] = $allow_cid;
1640                 $item["allow_gid"] = $allow_gid;
1641                 $item["deny_cid"] = $deny_cid;
1642                 $item["deny_gid"] = $deny_gid;
1643                 $item["private"] = $private;
1644                 $item["deleted"] = $parent_deleted;
1645
1646                 // Fill the cache field
1647                 self::putInCache($item);
1648
1649                 if ($notify) {
1650                         $item['edit'] = false;
1651                         $item['parent'] = $parent_id;
1652                         Hook::callAll('post_local', $item);
1653                         unset($item['edit']);
1654                         unset($item['parent']);
1655                 } else {
1656                         Hook::callAll('post_remote', $item);
1657                 }
1658
1659                 // This array field is used to trigger some automatic reactions
1660                 // It is mainly used in the "post_local" hook.
1661                 unset($item['api_source']);
1662
1663                 if (!empty($item['cancel'])) {
1664                         Logger::log('post cancelled by addon.');
1665                         return 0;
1666                 }
1667
1668                 /*
1669                  * Check for already added items.
1670                  * There is a timing issue here that sometimes creates double postings.
1671                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1672                  */
1673                 if ($item["uid"] == 0) {
1674                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1675                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1676                                 return 0;
1677                         }
1678                 }
1679
1680                 Logger::log('' . print_r($item,true), Logger::DATA);
1681
1682                 if (array_key_exists('tag', $item)) {
1683                         $tags = $item['tag'];
1684                         unset($item['tag']);
1685                 } else {
1686                         $tags = '';
1687                 }
1688
1689                 if (array_key_exists('file', $item)) {
1690                         $files = $item['file'];
1691                         unset($item['file']);
1692                 } else {
1693                         $files = '';
1694                 }
1695
1696                 // Creates or assigns the permission set
1697                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1698
1699                 // We are doing this outside of the transaction to avoid timing problems
1700                 if (!self::insertActivity($item)) {
1701                         self::insertContent($item);
1702                 }
1703
1704                 $delivery_data = ItemDeliveryData::extractFields($item);
1705
1706                 unset($item['postopts']);
1707                 unset($item['inform']);
1708
1709                 // These fields aren't stored anymore in the item table, they are fetched upon request
1710                 unset($item['author-link']);
1711                 unset($item['author-name']);
1712                 unset($item['author-avatar']);
1713
1714                 unset($item['owner-link']);
1715                 unset($item['owner-name']);
1716                 unset($item['owner-avatar']);
1717
1718                 DBA::transaction();
1719                 $ret = DBA::insert('item', $item);
1720
1721                 // When the item was successfully stored we fetch the ID of the item.
1722                 if (DBA::isResult($ret)) {
1723                         $current_post = DBA::lastInsertId();
1724                 } else {
1725                         // This can happen - for example - if there are locking timeouts.
1726                         DBA::rollback();
1727
1728                         // Store the data into a spool file so that we can try again later.
1729
1730                         // At first we restore the Diaspora signature that we removed above.
1731                         if (isset($encoded_signature)) {
1732                                 $item['dsprsig'] = $encoded_signature;
1733                         }
1734
1735                         // Now we store the data in the spool directory
1736                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1737                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1738
1739                         $spoolpath = get_spoolpath();
1740                         if ($spoolpath != "") {
1741                                 $spool = $spoolpath.'/'.$file;
1742
1743                                 file_put_contents($spool, json_encode($orig_item));
1744                                 Logger::log("Item wasn't stored - Item was spooled into file ".$file, Logger::DEBUG);
1745                         }
1746                         return 0;
1747                 }
1748
1749                 if ($current_post == 0) {
1750                         // This is one of these error messages that never should occur.
1751                         Logger::log("couldn't find created item - we better quit now.");
1752                         DBA::rollback();
1753                         return 0;
1754                 }
1755
1756                 // How much entries have we created?
1757                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1758                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1759
1760                 if ($entries > 1) {
1761                         // There are duplicates. We delete our just created entry.
1762                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1763
1764                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1765                         DBA::delete('item', ['id' => $current_post]);
1766                         DBA::commit();
1767                         return 0;
1768                 } elseif ($entries == 0) {
1769                         // This really should never happen since we quit earlier if there were problems.
1770                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1771                         DBA::rollback();
1772                         return 0;
1773                 }
1774
1775                 Logger::log('created item '.$current_post);
1776                 self::updateContact($item);
1777
1778                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1779                         $parent_id = $current_post;
1780                 }
1781
1782                 // Set parent id
1783                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1784
1785                 $item['id'] = $current_post;
1786                 $item['parent'] = $parent_id;
1787
1788                 // update the commented timestamp on the parent
1789                 // Only update "commented" if it is really a comment
1790                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1791                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1792                 } else {
1793                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1794                 }
1795
1796                 if ($dsprsig) {
1797                         /*
1798                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1799                          * We can check for this condition when we decode and encode the stuff again.
1800                          */
1801                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1802                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1803                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1804                         }
1805
1806                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1807                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1808                         } else {
1809                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1810                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1811                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1812                         }
1813                 }
1814
1815                 if (!empty($diaspora_signed_text)) {
1816                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1817                 }
1818
1819                 self::tagDeliver($item['uid'], $current_post);
1820
1821                 /*
1822                  * current post can be deleted if is for a community page and no mention are
1823                  * in it.
1824                  */
1825                 if (!$dontcache) {
1826                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1827                         if (DBA::isResult($posted_item)) {
1828                                 if ($notify) {
1829                                         Hook::callAll('post_local_end', $posted_item);
1830                                 } else {
1831                                         Hook::callAll('post_remote_end', $posted_item);
1832                                 }
1833                         } else {
1834                                 Logger::log('new item not found in DB, id ' . $current_post);
1835                         }
1836                 }
1837
1838                 if ($item['parent-uri'] === $item['uri']) {
1839                         self::addThread($current_post);
1840                 } else {
1841                         self::updateThread($parent_id);
1842                 }
1843
1844                 ItemDeliveryData::insert($current_post, $delivery_data);
1845
1846                 DBA::commit();
1847
1848                 /*
1849                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1850                  * This is not perfect - but a workable solution until we found the reason for the problem.
1851                  */
1852                 if (!empty($tags)) {
1853                         Term::insertFromTagFieldByItemId($current_post, $tags);
1854                 }
1855
1856                 if (!empty($files)) {
1857                         Term::insertFromFileFieldByItemId($current_post, $files);
1858                 }
1859
1860                 if ($item['parent-uri'] === $item['uri']) {
1861                         self::addShadow($current_post);
1862                 } else {
1863                         self::addShadowPost($current_post);
1864                 }
1865
1866                 check_user_notification($current_post);
1867
1868                 if ($notify) {
1869                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
1870                 } elseif ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin'])) {
1871                         if ($item['gravity'] == GRAVITY_ACTIVITY) {
1872                                 $cmd = $item['origin'] ? 'activity-new' : 'activity-import';
1873                         } elseif ($item['gravity'] == GRAVITY_COMMENT) {
1874                                 $cmd = $item['origin'] ? 'comment-new' : 'comment-import';
1875                         } else {
1876                                 $cmd = 'wall-new';
1877                         }
1878
1879                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $cmd, $current_post);
1880                 }
1881
1882                 return $current_post;
1883         }
1884
1885         /**
1886          * @brief Insert a new item content entry
1887          *
1888          * @param array $item The item fields that are to be inserted
1889          * @return bool
1890          * @throws \Exception
1891          */
1892         private static function insertActivity(&$item)
1893         {
1894                 $activity_index = self::activityToIndex($item['verb']);
1895
1896                 if ($activity_index < 0) {
1897                         return false;
1898                 }
1899
1900                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
1901
1902                 // We just remove everything that is content
1903                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1904                         unset($item[$field]);
1905                 }
1906
1907                 // To avoid timing problems, we are using locks.
1908                 $locked = Lock::acquire('item_insert_activity');
1909                 if (!$locked) {
1910                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1911                 }
1912
1913                 // Do we already have this content?
1914                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
1915                 if (DBA::isResult($item_activity)) {
1916                         $item['iaid'] = $item_activity['id'];
1917                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1918                 } elseif (DBA::insert('item-activity', $fields)) {
1919                         $item['iaid'] = DBA::lastInsertId();
1920                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1921                 } else {
1922                         // This shouldn't happen.
1923                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
1924                         Lock::release('item_insert_activity');
1925                         return false;
1926                 }
1927                 if ($locked) {
1928                         Lock::release('item_insert_activity');
1929                 }
1930                 return true;
1931         }
1932
1933         /**
1934          * @brief Insert a new item content entry
1935          *
1936          * @param array $item The item fields that are to be inserted
1937          * @throws \Exception
1938          */
1939         private static function insertContent(&$item)
1940         {
1941                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
1942
1943                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1944                         if (isset($item[$field])) {
1945                                 $fields[$field] = $item[$field];
1946                                 unset($item[$field]);
1947                         }
1948                 }
1949
1950                 // To avoid timing problems, we are using locks.
1951                 $locked = Lock::acquire('item_insert_content');
1952                 if (!$locked) {
1953                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1954                 }
1955
1956                 // Do we already have this content?
1957                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
1958                 if (DBA::isResult($item_content)) {
1959                         $item['icid'] = $item_content['id'];
1960                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1961                 } elseif (DBA::insert('item-content', $fields)) {
1962                         $item['icid'] = DBA::lastInsertId();
1963                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1964                 } else {
1965                         // This shouldn't happen.
1966                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
1967                 }
1968                 if ($locked) {
1969                         Lock::release('item_insert_content');
1970                 }
1971         }
1972
1973         /**
1974          * @brief Update existing item content entries
1975          *
1976          * @param array $item      The item fields that are to be changed
1977          * @param array $condition The condition for finding the item content entries
1978          * @return bool
1979          * @throws \Exception
1980          */
1981         private static function updateActivity($item, $condition)
1982         {
1983                 if (empty($item['verb'])) {
1984                         return false;
1985                 }
1986                 $activity_index = self::activityToIndex($item['verb']);
1987
1988                 if ($activity_index < 0) {
1989                         return false;
1990                 }
1991
1992                 $fields = ['activity' => $activity_index];
1993
1994                 Logger::log('Update activity for ' . json_encode($condition));
1995
1996                 DBA::update('item-activity', $fields, $condition, true);
1997
1998                 return true;
1999         }
2000
2001         /**
2002          * @brief Update existing item content entries
2003          *
2004          * @param array $item      The item fields that are to be changed
2005          * @param array $condition The condition for finding the item content entries
2006          * @throws \Exception
2007          */
2008         private static function updateContent($item, $condition)
2009         {
2010                 // We have to select only the fields from the "item-content" table
2011                 $fields = [];
2012                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2013                         if (isset($item[$field])) {
2014                                 $fields[$field] = $item[$field];
2015                         }
2016                 }
2017
2018                 if (empty($fields)) {
2019                         // when there are no fields at all, just use the condition
2020                         // This is to ensure that we always store content.
2021                         $fields = $condition;
2022                 }
2023
2024                 Logger::log('Update content for ' . json_encode($condition));
2025
2026                 DBA::update('item-content', $fields, $condition, true);
2027         }
2028
2029         /**
2030          * @brief Distributes public items to the receivers
2031          *
2032          * @param integer $itemid      Item ID that should be added
2033          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2034          * @throws \Exception
2035          */
2036         public static function distribute($itemid, $signed_text = '')
2037         {
2038                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2039                 $parent = self::selectFirst(['owner-id'], $condition);
2040                 if (!DBA::isResult($parent)) {
2041                         return;
2042                 }
2043
2044                 // Only distribute public items from native networks
2045                 $condition = ['id' => $itemid, 'uid' => 0,
2046                         'network' => [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS, ""],
2047                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2048                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2049                 if (!DBA::isResult($item)) {
2050                         return;
2051                 }
2052
2053                 $origin = $item['origin'];
2054
2055                 unset($item['id']);
2056                 unset($item['parent']);
2057                 unset($item['mention']);
2058                 unset($item['wall']);
2059                 unset($item['origin']);
2060                 unset($item['starred']);
2061
2062                 $users = [];
2063
2064                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2065                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2066                 if (!DBA::isResult($owner)) {
2067                         return;
2068                 }
2069
2070                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2071                 $contacts = DBA::select('contact', ['uid'], $condition);
2072                 while ($contact = DBA::fetch($contacts)) {
2073                         if ($contact['uid'] == 0) {
2074                                 continue;
2075                         }
2076
2077                         $users[$contact['uid']] = $contact['uid'];
2078                 }
2079                 DBA::close($contacts);
2080
2081                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2082                 $contacts = DBA::select('contact', ['uid'], $condition);
2083                 while ($contact = DBA::fetch($contacts)) {
2084                         if ($contact['uid'] == 0) {
2085                                 continue;
2086                         }
2087
2088                         $users[$contact['uid']] = $contact['uid'];
2089                 }
2090                 DBA::close($contacts);
2091
2092                 if (!empty($owner['alias'])) {
2093                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2094                         $contacts = DBA::select('contact', ['uid'], $condition);
2095                         while ($contact = DBA::fetch($contacts)) {
2096                                 if ($contact['uid'] == 0) {
2097                                         continue;
2098                                 }
2099
2100                                 $users[$contact['uid']] = $contact['uid'];
2101                         }
2102                         DBA::close($contacts);
2103                 }
2104
2105                 $origin_uid = 0;
2106
2107                 if ($item['uri'] != $item['parent-uri']) {
2108                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2109                         while ($parent = self::fetch($parents)) {
2110                                 $users[$parent['uid']] = $parent['uid'];
2111                                 if ($parent['origin'] && !$origin) {
2112                                         $origin_uid = $parent['uid'];
2113                                 }
2114                         }
2115                 }
2116
2117                 foreach ($users as $uid) {
2118                         if ($origin_uid == $uid) {
2119                                 $item['diaspora_signed_text'] = $signed_text;
2120                         }
2121                         self::storeForUser($itemid, $item, $uid);
2122                 }
2123         }
2124
2125         /**
2126          * @brief Store public items for the receivers
2127          *
2128          * @param integer $itemid Item ID that should be added
2129          * @param array   $item   The item entry that will be stored
2130          * @param integer $uid    The user that will receive the item entry
2131          * @throws \Exception
2132          */
2133         private static function storeForUser($itemid, $item, $uid)
2134         {
2135                 $item['uid'] = $uid;
2136                 $item['origin'] = 0;
2137                 $item['wall'] = 0;
2138                 if ($item['uri'] == $item['parent-uri']) {
2139                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2140                 } else {
2141                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2142                 }
2143
2144                 if (empty($item['contact-id'])) {
2145                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2146                         if (!DBA::isResult($self)) {
2147                                 return;
2148                         }
2149                         $item['contact-id'] = $self['id'];
2150                 }
2151
2152                 /// @todo Handling of "event-id"
2153
2154                 $notify = false;
2155                 if ($item['uri'] == $item['parent-uri']) {
2156                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2157                         if (DBA::isResult($contact)) {
2158                                 $notify = self::isRemoteSelf($contact, $item);
2159                         }
2160                 }
2161
2162                 $distributed = self::insert($item, false, $notify, true);
2163
2164                 if (!$distributed) {
2165                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2166                 } else {
2167                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2168                 }
2169         }
2170
2171         /**
2172          * @brief Add a shadow entry for a given item id that is a thread starter
2173          *
2174          * We store every public item entry additionally with the user id "0".
2175          * This is used for the community page and for the search.
2176          * It is planned that in the future we will store public item entries only once.
2177          *
2178          * @param integer $itemid Item ID that should be added
2179          * @throws \Exception
2180          */
2181         public static function addShadow($itemid)
2182         {
2183                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2184                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2185                 $item = self::selectFirst($fields, $condition);
2186
2187                 if (!DBA::isResult($item)) {
2188                         return;
2189                 }
2190
2191                 // is it already a copy?
2192                 if (($itemid == 0) || ($item['uid'] == 0)) {
2193                         return;
2194                 }
2195
2196                 // Is it a visible public post?
2197                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2198                         return;
2199                 }
2200
2201                 // is it an entry from a connector? Only add an entry for natively connected networks
2202                 if (!in_array($item["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS, ""])) {
2203                         return;
2204                 }
2205
2206                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2207                         return;
2208                 }
2209
2210                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2211
2212                 if (DBA::isResult($item)) {
2213                         // Preparing public shadow (removing user specific data)
2214                         $item['uid'] = 0;
2215                         unset($item['id']);
2216                         unset($item['parent']);
2217                         unset($item['wall']);
2218                         unset($item['mention']);
2219                         unset($item['origin']);
2220                         unset($item['starred']);
2221                         unset($item['postopts']);
2222                         unset($item['inform']);
2223                         if ($item['uri'] == $item['parent-uri']) {
2224                                 $item['contact-id'] = $item['owner-id'];
2225                         } else {
2226                                 $item['contact-id'] = $item['author-id'];
2227                         }
2228
2229                         $public_shadow = self::insert($item, false, false, true);
2230
2231                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2232                 }
2233         }
2234
2235         /**
2236          * @brief Add a shadow entry for a given item id that is a comment
2237          *
2238          * This function does the same like the function above - but for comments
2239          *
2240          * @param integer $itemid Item ID that should be added
2241          * @throws \Exception
2242          */
2243         public static function addShadowPost($itemid)
2244         {
2245                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2246                 if (!DBA::isResult($item)) {
2247                         return;
2248                 }
2249
2250                 // Is it a toplevel post?
2251                 if ($item['id'] == $item['parent']) {
2252                         self::addShadow($itemid);
2253                         return;
2254                 }
2255
2256                 // Is this a shadow entry?
2257                 if ($item['uid'] == 0) {
2258                         return;
2259                 }
2260
2261                 // Is there a shadow parent?
2262                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2263                         return;
2264                 }
2265
2266                 // Is there already a shadow entry?
2267                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2268                         return;
2269                 }
2270
2271                 // Save "origin" and "parent" state
2272                 $origin = $item['origin'];
2273                 $parent = $item['parent'];
2274
2275                 // Preparing public shadow (removing user specific data)
2276                 $item['uid'] = 0;
2277                 unset($item['id']);
2278                 unset($item['parent']);
2279                 unset($item['wall']);
2280                 unset($item['mention']);
2281                 unset($item['origin']);
2282                 unset($item['starred']);
2283                 unset($item['postopts']);
2284                 unset($item['inform']);
2285                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2286
2287                 $public_shadow = self::insert($item, false, false, true);
2288
2289                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2290
2291                 // If this was a comment to a Diaspora post we don't get our comment back.
2292                 // This means that we have to distribute the comment by ourselves.
2293                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2294                         self::distribute($public_shadow);
2295                 }
2296         }
2297
2298         /**
2299          * Adds a language specification in a "language" element of given $arr.
2300          * Expects "body" element to exist in $arr.
2301          *
2302          * @param $item
2303          * @throws \Text_LanguageDetect_Exception
2304          */
2305         private static function addLanguageToItemArray(&$item)
2306         {
2307                 $naked_body = BBCode::toPlaintext($item['body'], false);
2308
2309                 $ld = new Text_LanguageDetect();
2310                 $ld->setNameMode(2);
2311                 $languages = $ld->detect($naked_body, 3);
2312
2313                 if (is_array($languages)) {
2314                         $item['language'] = json_encode($languages);
2315                 }
2316         }
2317
2318         /**
2319          * @brief Creates an unique guid out of a given uri
2320          *
2321          * @param string $uri uri of an item entry
2322          * @param string $host hostname for the GUID prefix
2323          * @return string unique guid
2324          */
2325         public static function guidFromUri($uri, $host)
2326         {
2327                 // Our regular guid routine is using this kind of prefix as well
2328                 // We have to avoid that different routines could accidentally create the same value
2329                 $parsed = parse_url($uri);
2330
2331                 // We use a hash of the hostname as prefix for the guid
2332                 $guid_prefix = hash("crc32", $host);
2333
2334                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2335                 unset($parsed["scheme"]);
2336
2337                 // Glue it together to be able to make a hash from it
2338                 $host_id = implode("/", $parsed);
2339
2340                 // We could use any hash algorithm since it isn't a security issue
2341                 $host_hash = hash("ripemd128", $host_id);
2342
2343                 return $guid_prefix.$host_hash;
2344         }
2345
2346         /**
2347          * generate an unique URI
2348          *
2349          * @param integer $uid  User id
2350          * @param string  $guid An existing GUID (Otherwise it will be generated)
2351          *
2352          * @return string
2353          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2354          */
2355         public static function newURI($uid, $guid = "")
2356         {
2357                 if ($guid == "") {
2358                         $guid = System::createUUID();
2359                 }
2360
2361                 return self::getApp()->getBaseURL() . '/objects/' . $guid;
2362         }
2363
2364         /**
2365          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2366          *
2367          * This can be used to filter for inactive contacts.
2368          * Only do this for public postings to avoid privacy problems, since poco data is public.
2369          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2370          *
2371          * @param array $arr Contains the just posted item record
2372          * @throws \Exception
2373          */
2374         private static function updateContact($arr)
2375         {
2376                 // Unarchive the author
2377                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2378                 if (DBA::isResult($contact)) {
2379                         Contact::unmarkForArchival($contact);
2380                 }
2381
2382                 // Unarchive the contact if it's not our own contact
2383                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2384                 if (DBA::isResult($contact)) {
2385                         Contact::unmarkForArchival($contact);
2386                 }
2387
2388                 $update = (!$arr['private'] && ((defaults($arr, 'author-link', '') === defaults($arr, 'owner-link', '')) || ($arr["parent-uri"] === $arr["uri"])));
2389
2390                 // Is it a forum? Then we don't care about the rules from above
2391                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2392                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2393                                 $update = true;
2394                         }
2395                 }
2396
2397                 if ($update) {
2398                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2399                                 ['id' => $arr['contact-id']]);
2400                 }
2401                 // Now do the same for the system wide contacts with uid=0
2402                 if (!$arr['private']) {
2403                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2404                                 ['id' => $arr['owner-id']]);
2405
2406                         if ($arr['owner-id'] != $arr['author-id']) {
2407                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2408                                         ['id' => $arr['author-id']]);
2409                         }
2410                 }
2411         }
2412
2413         public static function setHashtags(&$item)
2414         {
2415                 $tags = BBCode::getTags($item["body"]);
2416
2417                 // No hashtags?
2418                 if (!count($tags)) {
2419                         return false;
2420                 }
2421
2422                 // What happens in [code], stays in [code]!
2423                 // escape the # and the [
2424                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2425                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2426                         function ($match) {
2427                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2428                                 $find = ['#', '['];
2429                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2430                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2431                         }, $item["body"]);
2432
2433                 // This sorting is important when there are hashtags that are part of other hashtags
2434                 // Otherwise there could be problems with hashtags like #test and #test2
2435                 rsort($tags);
2436
2437                 $URLSearchString = "^\[\]";
2438
2439                 // All hashtags should point to the home server if "local_tags" is activated
2440                 if (Config::get('system', 'local_tags')) {
2441                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2442                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2443
2444                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2445                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2446                 }
2447
2448                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2449                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2450                         function ($match) {
2451                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2452                         }, $item["body"]);
2453
2454                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2455                         function ($match) {
2456                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2457                         }, $item["body"]);
2458
2459                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2460                         function ($match) {
2461                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2462                         }, $item["body"]);
2463
2464                 // Repair recursive urls
2465                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2466                                 "&num;$2", $item["body"]);
2467
2468                 foreach ($tags as $tag) {
2469                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || $tag[1] == '#') {
2470                                 continue;
2471                         }
2472
2473                         $basetag = str_replace('_',' ',substr($tag,1));
2474                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2475
2476                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2477
2478                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2479                                 if (strlen($item["tag"])) {
2480                                         $item["tag"] = ',' . $item["tag"];
2481                                 }
2482                                 $item["tag"] = $newtag . $item["tag"];
2483                         }
2484                 }
2485
2486                 // Convert back the masked hashtags
2487                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2488
2489                 // Remember! What happens in [code], stays in [code]
2490                 // roleback the # and [
2491                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2492                         function ($match) {
2493                                 // we truly unESCape all sharp and leftsquarebracket
2494                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2495                                 $replace = ['#', '['];
2496                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2497                         }, $item["body"]);
2498         }
2499
2500         public static function getGuidById($id)
2501         {
2502                 $item = self::selectFirst(['guid'], ['id' => $id]);
2503                 if (DBA::isResult($item)) {
2504                         return $item['guid'];
2505                 } else {
2506                         return '';
2507                 }
2508         }
2509
2510         /**
2511          * This function is only used for the old Friendica app on Android that doesn't like paths with guid
2512          *
2513          * @param string $guid item guid
2514          * @param int    $uid  user id
2515          * @return array with id and nick of the item with the given guid
2516          * @throws \Exception
2517          */
2518         public static function getIdAndNickByGuid($guid, $uid = 0)
2519         {
2520                 $nick = "";
2521                 $id = 0;
2522
2523                 if ($uid == 0) {
2524                         $uid = local_user();
2525                 }
2526
2527                 // Does the given user have this item?
2528                 if ($uid) {
2529                         $item = self::selectFirst(['id'], ['guid' => $guid, 'uid' => $uid]);
2530                         if (DBA::isResult($item)) {
2531                                 $user = DBA::selectFirst('user', ['nickname'], ['uid' => $uid]);
2532                                 if (!DBA::isResult($user)) {
2533                                         return;
2534                                 }
2535                                 $id = $item['id'];
2536                                 $nick = $user['nickname'];
2537                         }
2538                 }
2539
2540                 // Or is it anywhere on the server?
2541                 if ($nick == "") {
2542                         $condition = ["`guid` = ? AND `uid` != 0", $guid];
2543                         $item = self::selectFirst(['id', 'uid'], $condition);
2544                         if (DBA::isResult($item)) {
2545                                 $user = DBA::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
2546                                 if (!DBA::isResult($user)) {
2547                                         return;
2548                                 }
2549                                 $id = $item['id'];
2550                                 $nick = $user['nickname'];
2551                         }
2552                 }
2553                 return ["nick" => $nick, "id" => $id];
2554         }
2555
2556         /**
2557          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2558          *
2559          * @param int $uid
2560          * @param int $item_id
2561          * @return void true if item was deleted, else false
2562          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2563          * @throws \ImagickException
2564          */
2565         private static function tagDeliver($uid, $item_id)
2566         {
2567                 $mention = false;
2568
2569                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2570                 if (!DBA::isResult($user)) {
2571                         return;
2572                 }
2573
2574                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2575                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2576
2577                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2578                 if (!DBA::isResult($item)) {
2579                         return;
2580                 }
2581
2582                 $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
2583
2584                 /*
2585                  * Diaspora uses their own hardwired link URL in @-tags
2586                  * instead of the one we supply with webfinger
2587                  */
2588                 $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['nickname']);
2589
2590                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2591                 if ($cnt) {
2592                         foreach ($matches as $mtch) {
2593                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2594                                         $mention = true;
2595                                         Logger::log('mention found: ' . $mtch[2]);
2596                                 }
2597                         }
2598                 }
2599
2600                 if (!$mention) {
2601                         if (($community_page || $prvgroup) &&
2602                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2603                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2604                                 // delete it!
2605                                 Logger::log("no-mention top-level post to community or private group. delete.");
2606                                 DBA::delete('item', ['id' => $item_id]);
2607                                 return true;
2608                         }
2609                         return;
2610                 }
2611
2612                 $arr = ['item' => $item, 'user' => $user];
2613
2614                 Hook::callAll('tagged', $arr);
2615
2616                 if (!$community_page && !$prvgroup) {
2617                         return;
2618                 }
2619
2620                 /*
2621                  * tgroup delivery - setup a second delivery chain
2622                  * prevent delivery looping - only proceed
2623                  * if the message originated elsewhere and is a top-level post
2624                  */
2625                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2626                         return;
2627                 }
2628
2629                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2630                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2631                 if (!DBA::isResult($self)) {
2632                         return;
2633                 }
2634
2635                 $owner_id = Contact::getIdForURL($self['url']);
2636
2637                 // also reset all the privacy bits to the forum default permissions
2638
2639                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2640
2641                 $psid = PermissionSet::fetchIDForPost($user);
2642
2643                 $forum_mode = ($prvgroup ? 2 : 1);
2644
2645                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2646                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2647                 self::update($fields, ['id' => $item_id]);
2648
2649                 self::updateThread($item_id);
2650
2651                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2652         }
2653
2654         public static function isRemoteSelf($contact, &$datarray)
2655         {
2656                 $a = \get_app();
2657
2658                 if (!$contact['remote_self']) {
2659                         return false;
2660                 }
2661
2662                 // Prevent the forwarding of posts that are forwarded
2663                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2664                         Logger::log('Already forwarded', Logger::DEBUG);
2665                         return false;
2666                 }
2667
2668                 // Prevent to forward already forwarded posts
2669                 if ($datarray["app"] == $a->getHostName()) {
2670                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2671                         return false;
2672                 }
2673
2674                 // Only forward posts
2675                 if ($datarray["verb"] != ACTIVITY_POST) {
2676                         Logger::log('No post', Logger::DEBUG);
2677                         return false;
2678                 }
2679
2680                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2681                         Logger::log('Not public', Logger::DEBUG);
2682                         return false;
2683                 }
2684
2685                 $datarray2 = $datarray;
2686                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2687                 if ($contact['remote_self'] == 2) {
2688                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2689                                         ['uid' => $contact['uid'], 'self' => true]);
2690                         if (DBA::isResult($self)) {
2691                                 $datarray['contact-id'] = $self["id"];
2692
2693                                 $datarray['owner-name'] = $self["name"];
2694                                 $datarray['owner-link'] = $self["url"];
2695                                 $datarray['owner-avatar'] = $self["thumb"];
2696
2697                                 $datarray['author-name']   = $datarray['owner-name'];
2698                                 $datarray['author-link']   = $datarray['owner-link'];
2699                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2700
2701                                 unset($datarray['created']);
2702                                 unset($datarray['edited']);
2703
2704                                 unset($datarray['network']);
2705                                 unset($datarray['owner-id']);
2706                                 unset($datarray['author-id']);
2707                         }
2708
2709                         if ($contact['network'] != Protocol::FEED) {
2710                                 $datarray["guid"] = System::createUUID();
2711                                 unset($datarray["plink"]);
2712                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2713                                 $datarray["parent-uri"] = $datarray["uri"];
2714                                 $datarray["thr-parent"] = $datarray["uri"];
2715                                 $datarray["extid"] = Protocol::DFRN;
2716                                 $urlpart = parse_url($datarray2['author-link']);
2717                                 $datarray["app"] = $urlpart["host"];
2718                         } else {
2719                                 $datarray['private'] = 0;
2720                         }
2721                 }
2722
2723                 if ($contact['network'] != Protocol::FEED) {
2724                         // Store the original post
2725                         $result = self::insert($datarray2, false, false);
2726                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2727                 } else {
2728                         $datarray["app"] = "Feed";
2729                         $result = true;
2730                 }
2731
2732                 // Trigger automatic reactions for addons
2733                 $datarray['api_source'] = true;
2734
2735                 // We have to tell the hooks who we are - this really should be improved
2736                 $_SESSION["authenticated"] = true;
2737                 $_SESSION["uid"] = $contact['uid'];
2738
2739                 return $result;
2740         }
2741
2742         /**
2743          *
2744          * @param string $s
2745          * @param int    $uid
2746          * @param array  $item
2747          * @param int    $cid
2748          * @return string
2749          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2750          * @throws \ImagickException
2751          */
2752         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2753         {
2754                 if (Config::get('system', 'disable_embedded')) {
2755                         return $s;
2756                 }
2757
2758                 Logger::log('check for photos', Logger::DEBUG);
2759                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2760
2761                 $orig_body = $s;
2762                 $new_body = '';
2763
2764                 $img_start = strpos($orig_body, '[img');
2765                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2766                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2767
2768                 while (($img_st_close !== false) && ($img_len !== false)) {
2769                         $img_st_close++; // make it point to AFTER the closing bracket
2770                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2771
2772                         Logger::log('found photo ' . $image, Logger::DEBUG);
2773
2774                         if (stristr($image, $site . '/photo/')) {
2775                                 // Only embed locally hosted photos
2776                                 $replace = false;
2777                                 $i = basename($image);
2778                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2779                                 $x = strpos($i, '-');
2780
2781                                 if ($x) {
2782                                         $res = substr($i, $x + 1);
2783                                         $i = substr($i, 0, $x);
2784                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2785                                         if (DBA::isResult($photo)) {
2786                                                 /*
2787                                                  * Check to see if we should replace this photo link with an embedded image
2788                                                  * 1. No need to do so if the photo is public
2789                                                  * 2. If there's a contact-id provided, see if they're in the access list
2790                                                  *    for the photo. If so, embed it.
2791                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2792                                                  *    permissions, regardless of order but first check to see if they're an exact
2793                                                  *    match to save some processing overhead.
2794                                                  */
2795                                                 if (self::hasPermissions($photo)) {
2796                                                         if ($cid) {
2797                                                                 $recips = self::enumeratePermissions($photo);
2798                                                                 if (in_array($cid, $recips)) {
2799                                                                         $replace = true;
2800                                                                 }
2801                                                         } elseif ($item) {
2802                                                                 if (self::samePermissions($item, $photo)) {
2803                                                                         $replace = true;
2804                                                                 }
2805                                                         }
2806                                                 }
2807                                                 if ($replace) {
2808                                                         $photo_img = Photo::getImageForPhoto($photo);
2809                                                         // If a custom width and height were specified, apply before embedding
2810                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2811                                                                 Logger::log('scaling photo', Logger::DEBUG);
2812
2813                                                                 $width = intval($match[1]);
2814                                                                 $height = intval($match[2]);
2815
2816                                                                 $photo_img->scaleDown(max($width, $height));
2817                                                         }
2818
2819                                                         $data = $photo_img->asString();
2820                                                         $type = $photo_img->getType();
2821
2822                                                         Logger::log('replacing photo', Logger::DEBUG);
2823                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2824                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2825                                                 }
2826                                         }
2827                                 }
2828                         }
2829
2830                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2831                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2832                         if ($orig_body === false) {
2833                                 $orig_body = '';
2834                         }
2835
2836                         $img_start = strpos($orig_body, '[img');
2837                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2838                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2839                 }
2840
2841                 $new_body = $new_body . $orig_body;
2842
2843                 return $new_body;
2844         }
2845
2846         private static function hasPermissions($obj)
2847         {
2848                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2849                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2850         }
2851
2852         private static function samePermissions($obj1, $obj2)
2853         {
2854                 // first part is easy. Check that these are exactly the same.
2855                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2856                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2857                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2858                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2859                         return true;
2860                 }
2861
2862                 // This is harder. Parse all the permissions and compare the resulting set.
2863                 $recipients1 = self::enumeratePermissions($obj1);
2864                 $recipients2 = self::enumeratePermissions($obj2);
2865                 sort($recipients1);
2866                 sort($recipients2);
2867
2868                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2869                 return ($recipients1 == $recipients2);
2870         }
2871
2872         // returns an array of contact-ids that are allowed to see this object
2873         public static function enumeratePermissions($obj)
2874         {
2875                 $allow_people = expand_acl($obj['allow_cid']);
2876                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2877                 $deny_people  = expand_acl($obj['deny_cid']);
2878                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2879                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2880                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2881                 $recipients   = array_diff($recipients, $deny);
2882                 return $recipients;
2883         }
2884
2885         public static function getFeedTags($item)
2886         {
2887                 $ret = [];
2888                 $matches = false;
2889                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2890                 if ($cnt) {
2891                         for ($x = 0; $x < $cnt; $x ++) {
2892                                 if ($matches[1][$x]) {
2893                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2894                                 }
2895                         }
2896                 }
2897                 $matches = false;
2898                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2899                 if ($cnt) {
2900                         for ($x = 0; $x < $cnt; $x ++) {
2901                                 if ($matches[1][$x]) {
2902                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2903                                 }
2904                         }
2905                 }
2906                 return $ret;
2907         }
2908
2909         public static function expire($uid, $days, $network = "", $force = false)
2910         {
2911                 if (!$uid || ($days < 1)) {
2912                         return;
2913                 }
2914
2915                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2916                         $uid, GRAVITY_PARENT];
2917
2918                 /*
2919                  * $expire_network_only = save your own wall posts
2920                  * and just expire conversations started by others
2921                  */
2922                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
2923
2924                 if ($expire_network_only) {
2925                         $condition[0] .= " AND NOT `wall`";
2926                 }
2927
2928                 if ($network != "") {
2929                         $condition[0] .= " AND `network` = ?";
2930                         $condition[] = $network;
2931
2932                         /*
2933                          * There is an index "uid_network_received" but not "uid_network_created"
2934                          * This avoids the creation of another index just for one purpose.
2935                          * And it doesn't really matter wether to look at "received" or "created"
2936                          */
2937                         $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2938                         $condition[] = $days;
2939                 } else {
2940                         $condition[0] .= " AND `created` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2941                         $condition[] = $days;
2942                 }
2943
2944                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
2945
2946                 if (!DBA::isResult($items)) {
2947                         return;
2948                 }
2949
2950                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
2951
2952                 // Forcing expiring of items - but not notes and marked items
2953                 if ($force) {
2954                         $expire_items = true;
2955                 }
2956
2957                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
2958                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
2959                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
2960
2961                 $expired = 0;
2962
2963                 while ($item = Item::fetch($items)) {
2964                         // don't expire filed items
2965
2966                         if (strpos($item['file'], '[') !== false) {
2967                                 continue;
2968                         }
2969
2970                         // Only expire posts, not photos and photo comments
2971
2972                         if (!$expire_photos && strlen($item['resource-id'])) {
2973                                 continue;
2974                         } elseif (!$expire_starred && intval($item['starred'])) {
2975                                 continue;
2976                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
2977                                 continue;
2978                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
2979                                 continue;
2980                         }
2981
2982                         self::deleteById($item['id'], PRIORITY_LOW);
2983
2984                         ++$expired;
2985                 }
2986                 DBA::close($items);
2987                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2988         }
2989
2990         public static function firstPostDate($uid, $wall = false)
2991         {
2992                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2993                 $params = ['order' => ['created' => false]];
2994                 $thread = DBA::selectFirst('thread', ['created'], $condition, $params);
2995                 if (DBA::isResult($thread)) {
2996                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2997                 }
2998                 return false;
2999         }
3000
3001         /**
3002          * @brief add/remove activity to an item
3003          *
3004          * Toggle activities as like,dislike,attend of an item
3005          *
3006          * @param string $item_id
3007          * @param string $verb
3008          *            Activity verb. One of
3009          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3010          *            attendno, unattendno, attendmaybe, unattendmaybe
3011          * @return bool
3012          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3013          * @throws \ImagickException
3014          * @hook  'post_local_end'
3015          *            array $arr
3016          *            'post_id' => ID of posted item
3017          */
3018         public static function performLike($item_id, $verb)
3019         {
3020                 if (!local_user() && !remote_user()) {
3021                         return false;
3022                 }
3023
3024                 switch ($verb) {
3025                         case 'like':
3026                         case 'unlike':
3027                                 $activity = ACTIVITY_LIKE;
3028                                 break;
3029                         case 'dislike':
3030                         case 'undislike':
3031                                 $activity = ACTIVITY_DISLIKE;
3032                                 break;
3033                         case 'attendyes':
3034                         case 'unattendyes':
3035                                 $activity = ACTIVITY_ATTEND;
3036                                 break;
3037                         case 'attendno':
3038                         case 'unattendno':
3039                                 $activity = ACTIVITY_ATTENDNO;
3040                                 break;
3041                         case 'attendmaybe':
3042                         case 'unattendmaybe':
3043                                 $activity = ACTIVITY_ATTENDMAYBE;
3044                                 break;
3045                         default:
3046                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3047                                 return false;
3048                 }
3049
3050                 // Enable activity toggling instead of on/off
3051                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
3052
3053                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3054
3055                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3056                 if (!DBA::isResult($item)) {
3057                         Logger::log('like: unknown item ' . $item_id);
3058                         return false;
3059                 }
3060
3061                 $item_uri = $item['uri'];
3062
3063                 $uid = $item['uid'];
3064                 if (($uid == 0) && local_user()) {
3065                         $uid = local_user();
3066                 }
3067
3068                 if (!Security::canWriteToUserWall($uid)) {
3069                         Logger::log('like: unable to write on wall ' . $uid);
3070                         return false;
3071                 }
3072
3073                 // Retrieves the local post owner
3074                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3075                 if (!DBA::isResult($owner_self_contact)) {
3076                         Logger::log('like: unknown owner ' . $uid);
3077                         return false;
3078                 }
3079
3080                 // Retrieve the current logged in user's public contact
3081                 $author_id = public_contact();
3082
3083                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3084                 if (!DBA::isResult($author_contact)) {
3085                         Logger::log('like: unknown author ' . $author_id);
3086                         return false;
3087                 }
3088
3089                 // Contact-id is the uid-dependant author contact
3090                 if (local_user() == $uid) {
3091                         $item_contact_id = $owner_self_contact['id'];
3092                 } else {
3093                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3094                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3095                         if (!DBA::isResult($item_contact)) {
3096                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3097                                 return false;
3098                         }
3099                 }
3100
3101                 // Look for an existing verb row
3102                 // event participation are essentially radio toggles. If you make a subsequent choice,
3103                 // we need to eradicate your first choice.
3104                 if ($event_verb_flag) {
3105                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
3106
3107                         // Translate to the index based activity index
3108                         $activities = [];
3109                         foreach ($verbs as $verb) {
3110                                 $activities[] = self::activityToIndex($verb);
3111                         }
3112                 } else {
3113                         $activities = self::activityToIndex($activity);
3114                 }
3115
3116                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3117                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3118
3119                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3120
3121                 // If it exists, mark it as deleted
3122                 if (DBA::isResult($like_item)) {
3123                         self::deleteById($like_item['id']);
3124
3125                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3126                                 return true;
3127                         }
3128                 }
3129
3130                 // Verb is "un-something", just trying to delete existing entries
3131                 if (strpos($verb, 'un') === 0) {
3132                         return true;
3133                 }
3134
3135                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE;
3136
3137                 $new_item = [
3138                         'guid'          => System::createUUID(),
3139                         'uri'           => self::newURI($item['uid']),
3140                         'uid'           => $item['uid'],
3141                         'contact-id'    => $item_contact_id,
3142                         'wall'          => $item['wall'],
3143                         'origin'        => 1,
3144                         'network'       => Protocol::DFRN,
3145                         'gravity'       => GRAVITY_ACTIVITY,
3146                         'parent'        => $item['id'],
3147                         'parent-uri'    => $item['uri'],
3148                         'thr-parent'    => $item['uri'],
3149                         'owner-id'      => $author_id,
3150                         'author-id'     => $author_id,
3151                         'body'          => $activity,
3152                         'verb'          => $activity,
3153                         'object-type'   => $objtype,
3154                         'allow_cid'     => $item['allow_cid'],
3155                         'allow_gid'     => $item['allow_gid'],
3156                         'deny_cid'      => $item['deny_cid'],
3157                         'deny_gid'      => $item['deny_gid'],
3158                         'visible'       => 1,
3159                         'unseen'        => 1,
3160                 ];
3161
3162                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3163                 if (!empty($signed)) {
3164                         $new_item['diaspora_signed_text'] = json_encode($signed);
3165                 }
3166
3167                 $new_item_id = self::insert($new_item);
3168
3169                 // If the parent item isn't visible then set it to visible
3170                 if (!$item['visible']) {
3171                         self::update(['visible' => true], ['id' => $item['id']]);
3172                 }
3173
3174                 $new_item['id'] = $new_item_id;
3175
3176                 Hook::callAll('post_local_end', $new_item);
3177
3178                 return true;
3179         }
3180
3181         private static function addThread($itemid, $onlyshadow = false)
3182         {
3183                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3184                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3185                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3186                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3187                 $item = self::selectFirst($fields, $condition);
3188
3189                 if (!DBA::isResult($item)) {
3190                         return;
3191                 }
3192
3193                 $item['iid'] = $itemid;
3194
3195                 if (!$onlyshadow) {
3196                         $result = DBA::insert('thread', $item);
3197
3198                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3199                 }
3200         }
3201
3202         private static function updateThread($itemid, $setmention = false)
3203         {
3204                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3205                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3206                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3207                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3208
3209                 $item = self::selectFirst($fields, $condition);
3210                 if (!DBA::isResult($item)) {
3211                         return;
3212                 }
3213
3214                 if ($setmention) {
3215                         $item["mention"] = 1;
3216                 }
3217
3218                 $fields = [];
3219
3220                 foreach ($item as $field => $data) {
3221                         if (!in_array($field, ["guid"])) {
3222                                 $fields[$field] = $data;
3223                         }
3224                 }
3225
3226                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3227
3228                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3229         }
3230
3231         private static function deleteThread($itemid, $itemuri = "")
3232         {
3233                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3234                 if (!DBA::isResult($item)) {
3235                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3236                         return;
3237                 }
3238
3239                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3240
3241                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3242
3243                 if ($itemuri != "") {
3244                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3245                         if (!self::exists($condition)) {
3246                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3247                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3248                         }
3249                 }
3250         }
3251
3252         public static function getPermissionsSQLByUserId($owner_id, $remote_verified = false, $groups = null, $remote_cid = null)
3253         {
3254                 $local_user = local_user();
3255                 $remote_user = remote_user();
3256
3257                 /*
3258                  * Construct permissions
3259                  *
3260                  * default permissions - anonymous user
3261                  */
3262                 $sql = " AND NOT `item`.`private`";
3263
3264                 // Profile owner - everything is visible
3265                 if ($local_user && ($local_user == $owner_id)) {
3266                         $sql = '';
3267                 } elseif ($remote_user) {
3268                         /*
3269                          * Authenticated visitor. Unless pre-verified,
3270                          * check that the contact belongs to this $owner_id
3271                          * and load the groups the visitor belongs to.
3272                          * If pre-verified, the caller is expected to have already
3273                          * done this and passed the groups into this function.
3274                          */
3275                         $set = PermissionSet::get($owner_id, $remote_cid, $groups);
3276
3277                         if (!empty($set)) {
3278                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3279                         } else {
3280                                 $sql_set = '';
3281                         }
3282
3283                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3284                 }
3285
3286                 return $sql;
3287         }
3288
3289         /**
3290          * get translated item type
3291          *
3292          * @param $item
3293          * @return string
3294          */
3295         public static function postType($item)
3296         {
3297                 if (!empty($item['event-id'])) {
3298                         return L10n::t('event');
3299                 } elseif (!empty($item['resource-id'])) {
3300                         return L10n::t('photo');
3301                 } elseif (!empty($item['verb']) && $item['verb'] !== ACTIVITY_POST) {
3302                         return L10n::t('activity');
3303                 } elseif ($item['id'] != $item['parent']) {
3304                         return L10n::t('comment');
3305                 }
3306
3307                 return L10n::t('post');
3308         }
3309
3310         /**
3311          * Sets the "rendered-html" field of the provided item
3312          *
3313          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3314          *
3315          * @param array $item
3316          * @param bool  $update
3317          *
3318          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3319          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3320          */
3321         public static function putInCache(&$item, $update = false)
3322         {
3323                 $body = $item["body"];
3324
3325                 $rendered_hash = defaults($item, 'rendered-hash', '');
3326                 $rendered_html = defaults($item, 'rendered-html', '');
3327
3328                 if ($rendered_hash == ''
3329                         || $rendered_html == ""
3330                         || $rendered_hash != hash("md5", $item["body"])
3331                         || Config::get("system", "ignore_cache")
3332                 ) {
3333                         $a = self::getApp();
3334                         redir_private_images($a, $item);
3335
3336                         $item["rendered-html"] = prepare_text($item["body"]);
3337                         $item["rendered-hash"] = hash("md5", $item["body"]);
3338
3339                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3340                         Hook::callAll('put_item_in_cache', $hook_data);
3341                         $item['rendered-html'] = $hook_data['rendered-html'];
3342                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3343                         unset($hook_data);
3344
3345                         // Force an update if the generated values differ from the existing ones
3346                         if ($rendered_hash != $item["rendered-hash"]) {
3347                                 $update = true;
3348                         }
3349
3350                         // Only compare the HTML when we forcefully ignore the cache
3351                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3352                                 $update = true;
3353                         }
3354
3355                         if ($update && !empty($item["id"])) {
3356                                 self::update(
3357                                         [
3358                                                 'rendered-html' => $item["rendered-html"],
3359                                                 'rendered-hash' => $item["rendered-hash"]
3360                                         ],
3361                                         ['id' => $item["id"]]
3362                                 );
3363                         }
3364                 }
3365
3366                 $item["body"] = $body;
3367         }
3368
3369         /**
3370          * @brief Given an item array, convert the body element from bbcode to html and add smilie icons.
3371          * If attach is true, also add icons for item attachments.
3372          *
3373          * @param array   $item
3374          * @param boolean $attach
3375          * @param boolean $is_preview
3376          * @return string item body html
3377          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3378          * @throws \ImagickException
3379          * @hook  prepare_body_init item array before any work
3380          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3381          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3382          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3383          */
3384         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3385         {
3386                 $a = self::getApp();
3387                 Hook::callAll('prepare_body_init', $item);
3388
3389                 // In order to provide theme developers more possibilities, event items
3390                 // are treated differently.
3391                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT && isset($item['event-id'])) {
3392                         $ev = Event::getItemHTML($item);
3393                         return $ev;
3394                 }
3395
3396                 $tags = Term::populateTagsFromItem($item);
3397
3398                 $item['tags'] = $tags['tags'];
3399                 $item['hashtags'] = $tags['hashtags'];
3400                 $item['mentions'] = $tags['mentions'];
3401
3402                 // Compile eventual content filter reasons
3403                 $filter_reasons = [];
3404                 if (!$is_preview && public_contact() != $item['author-id']) {
3405                         if (!empty($item['content-warning']) && (!local_user() || !PConfig::get(local_user(), 'system', 'disable_cw', false))) {
3406                                 $filter_reasons[] = L10n::t('Content warning: %s', $item['content-warning']);
3407                         }
3408
3409                         $hook_data = [
3410                                 'item' => $item,
3411                                 'filter_reasons' => $filter_reasons
3412                         ];
3413                         Hook::callAll('prepare_body_content_filter', $hook_data);
3414                         $filter_reasons = $hook_data['filter_reasons'];
3415                         unset($hook_data);
3416                 }
3417
3418                 // Update the cached values if there is no "zrl=..." on the links.
3419                 $update = (!local_user() && !remote_user() && ($item["uid"] == 0));
3420
3421                 // Or update it if the current viewer is the intented viewer.
3422                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3423                         $update = true;
3424                 }
3425
3426                 self::putInCache($item, $update);
3427                 $s = $item["rendered-html"];
3428
3429                 $hook_data = [
3430                         'item' => $item,
3431                         'html' => $s,
3432                         'preview' => $is_preview,
3433                         'filter_reasons' => $filter_reasons
3434                 ];
3435                 Hook::callAll('prepare_body', $hook_data);
3436                 $s = $hook_data['html'];
3437                 unset($hook_data);
3438
3439                 if (!$attach) {
3440                         // Replace the blockquotes with quotes that are used in mails.
3441                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3442                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3443                         return $s;
3444                 }
3445
3446                 $as = '';
3447                 $vhead = false;
3448                 $matches = [];
3449                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3450                 foreach ($matches as $mtch) {
3451                         $mime = $mtch[3];
3452
3453                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3454
3455                         if (strpos($mime, 'video') !== false) {
3456                                 if (!$vhead) {
3457                                         $vhead = true;
3458                                         $a->page['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'), [
3459                                                 '$baseurl' => System::baseUrl(),
3460                                         ]);
3461                                 }
3462
3463                                 $url_parts = explode('/', $the_url);
3464                                 $id = end($url_parts);
3465                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3466                                         '$video' => [
3467                                                 'id'     => $id,
3468                                                 'title'  => L10n::t('View Video'),
3469                                                 'src'    => $the_url,
3470                                                 'mime'   => $mime,
3471                                         ],
3472                                 ]);
3473                         }
3474
3475                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3476                         if ($filetype) {
3477                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3478                                 $filesubtype = str_replace('.', '-', $filesubtype);
3479                         } else {
3480                                 $filetype = 'unkn';
3481                                 $filesubtype = 'unkn';
3482                         }
3483
3484                         $title = Strings::escapeHtml(trim(defaults($mtch, 4, $mtch[1])));
3485                         $title .= ' ' . $mtch[2] . ' ' . L10n::t('bytes');
3486
3487                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3488                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3489                 }
3490
3491                 if ($as != '') {
3492                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3493                 }
3494
3495                 // Map.
3496                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3497                         $x = Map::byCoordinates(trim($item['coord']));
3498                         if ($x) {
3499                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3500                         }
3501                 }
3502
3503
3504                 // Look for spoiler.
3505                 $spoilersearch = '<blockquote class="spoiler">';
3506
3507                 // Remove line breaks before the spoiler.
3508                 while ((strpos($s, "\n" . $spoilersearch) !== false)) {
3509                         $s = str_replace("\n" . $spoilersearch, $spoilersearch, $s);
3510                 }
3511                 while ((strpos($s, "<br />" . $spoilersearch) !== false)) {
3512                         $s = str_replace("<br />" . $spoilersearch, $spoilersearch, $s);
3513                 }
3514
3515                 while ((strpos($s, $spoilersearch) !== false)) {
3516                         $pos = strpos($s, $spoilersearch);
3517                         $rnd = Strings::getRandomHex(8);
3518                         $spoilerreplace = '<br /> <span id="spoiler-wrap-' . $rnd . '" class="spoiler-wrap fakelink" onclick="openClose(\'spoiler-' . $rnd . '\');">' . L10n::t('Click to open/close') . '</span>'.
3519                                                 '<blockquote class="spoiler" id="spoiler-' . $rnd . '" style="display: none;">';
3520                         $s = substr($s, 0, $pos) . $spoilerreplace . substr($s, $pos + strlen($spoilersearch));
3521                 }
3522
3523                 // Look for quote with author.
3524                 $authorsearch = '<blockquote class="author">';
3525
3526                 while ((strpos($s, $authorsearch) !== false)) {
3527                         $pos = strpos($s, $authorsearch);
3528                         $rnd = Strings::getRandomHex(8);
3529                         $authorreplace = '<br /> <span id="author-wrap-' . $rnd . '" class="author-wrap fakelink" onclick="openClose(\'author-' . $rnd . '\');">' . L10n::t('Click to open/close') . '</span>'.
3530                                                 '<blockquote class="author" id="author-' . $rnd . '" style="display: block;">';
3531                         $s = substr($s, 0, $pos) . $authorreplace . substr($s, $pos + strlen($authorsearch));
3532                 }
3533
3534                 // Replace friendica image url size with theme preference.
3535                 if (!empty($a->theme_info['item_image_size'])) {
3536                         $ps = $a->theme_info['item_image_size'];
3537                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3538                 }
3539
3540                 $s = HTML::applyContentFilter($s, $filter_reasons);
3541
3542                 $hook_data = ['item' => $item, 'html' => $s];
3543                 Hook::callAll('prepare_body_final', $hook_data);
3544
3545                 return $hook_data['html'];
3546         }
3547
3548         /**
3549          * get private link for item
3550          *
3551          * @param array $item
3552          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3553          * @throws \Exception
3554          */
3555         public static function getPlink($item)
3556         {
3557                 $a = self::getApp();
3558
3559                 if ($a->user['nickname'] != "") {
3560                         $ret = [
3561                                 'href' => "display/" . $item['guid'],
3562                                 'orig' => "display/" . $item['guid'],
3563                                 'title' => L10n::t('View on separate page'),
3564                                 'orig_title' => L10n::t('view on separate page'),
3565                         ];
3566
3567                         if (!empty($item['plink'])) {
3568                                 $ret["href"] = $a->removeBaseURL($item['plink']);
3569                                 $ret["title"] = L10n::t('link to source');
3570                         }
3571
3572                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3573                         $ret = [
3574                                 'href' => $item['plink'],
3575                                 'orig' => $item['plink'],
3576                                 'title' => L10n::t('link to source'),
3577                         ];
3578                 } else {
3579                         $ret = [];
3580                 }
3581
3582                 return $ret;
3583         }
3584 }