src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Core\Worker;
  33 use Friendica\Database\DBA;
  34 use Friendica\DI;
  35 use Friendica\Protocol\Activity;
  36 use Friendica\Protocol\ActivityPub;
  37 use Friendica\Protocol\Diaspora;
  38 use Friendica\Protocol\OStatus;
  39 use Friendica\Util\DateTimeFormat;
  40 use Friendica\Util\Map;
  41 use Friendica\Util\Network;
  42 use Friendica\Util\Security;
  43 use Friendica\Util\Strings;
  44 use Friendica\Util\XML;
  45 use Friendica\Worker\Delivery;
  46 use Text_LanguageDetect;
  47 use Friendica\Repository\PermissionSet as RepPermissionSet;
  48
  49 class Item
  50 {
  51         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  52         const PT_ARTICLE = 0;
  53         const PT_NOTE = 1;
  54         const PT_PAGE = 2;
  55         const PT_IMAGE = 16;
  56         const PT_AUDIO = 17;
  57         const PT_VIDEO = 18;
  58         const PT_DOCUMENT = 19;
  59         const PT_EVENT = 32;
  60         const PT_PERSONAL_NOTE = 128;
  61
  62         // Field list that is used to display the items
  63         const DISPLAY_FIELDLIST = [
  64                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  65                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  66                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  67                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  68                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  69                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  70                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  71                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  72                 'writable', 'self', 'cid', 'alias', 'pinned',
  73                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  74                 'event-summary', 'event-desc', 'event-location', 'event-type',
  75                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  76                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  77         ];
  78
  79         // Field list that is used to deliver items via the protocols
  80         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  81                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  82                         'private', 'title', 'body', 'location', 'coord', 'app',
  83                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  84                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  85                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  86                         'signed_text', 'signature', 'signer', 'network'];
  87
  88         // Field list for "item-content" table that is mixed with the item table
  89         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  90                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  91                         'object-type', 'object', 'target-type', 'target', 'plink'];
  92
  93         // Field list for "item-content" table that is not present in the "item" table
  94         const CONTENT_FIELDLIST = ['language'];
  95
  96         // All fields in the item table
  97         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  98                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  99                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 100                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
 101                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 102                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 103                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 104                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 105                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 106                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 107                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
 108
 109         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 110         // The item-activity table only stores the index and needs this array to know the matching activity.
 111         const ACTIVITIES = [
 112                 Activity::LIKE, Activity::DISLIKE,
 113                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 114                 Activity::FOLLOW,
 115                 Activity::ANNOUNCE];
 116
 117         const PUBLIC = 0;
 118         const PRIVATE = 1;
 119         const UNLISTED = 2;
 120
 121         private static $legacy_mode = null;
 122
 123         public static function isLegacyMode()
 124         {
 125                 if (is_null(self::$legacy_mode)) {
 126                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 127                 }
 128
 129                 return self::$legacy_mode;
 130         }
 131
 132         /**
 133          * Set the pinned state of an item
 134          *
 135          * @param integer $iid    Item ID
 136          * @param integer $uid    User ID
 137          * @param boolean $pinned Pinned state
 138          */
 139         public static function setPinned(int $iid, int $uid, bool $pinned)
 140         {
 141                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 142         }
 143
 144         /**
 145          * Get the pinned state
 146          *
 147          * @param integer $iid Item ID
 148          * @param integer $uid User ID
 149          *
 150          * @return boolean pinned state
 151          */
 152         public static function getPinned(int $iid, int $uid)
 153         {
 154                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 155                 if (!DBA::isResult($useritem)) {
 156                         return false;
 157                 }
 158                 return (bool)$useritem['pinned'];
 159         }
 160
 161         /**
 162          * Select pinned rows from the item table for a given user
 163          *
 164          * @param integer $uid       User ID
 165          * @param array   $selected  Array of selected fields, empty for all
 166          * @param array   $condition Array of fields for condition
 167          * @param array   $params    Array of several parameters
 168          *
 169          * @return boolean|object
 170          * @throws \Exception
 171          */
 172         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 173         {
 174                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 175                 if (!DBA::isResult($useritems)) {
 176                         return $useritems;
 177                 }
 178
 179                 $pinned = [];
 180                 while ($useritem = DBA::fetch($useritems)) {
 181                         $pinned[] = $useritem['iid'];
 182                 }
 183                 DBA::close($useritems);
 184
 185                 if (empty($pinned)) {
 186                         return [];
 187                 }
 188
 189                 if (empty($condition) || !is_array($condition)) {
 190                         $condition = ['iid' => $pinned];
 191                 } else {
 192                         reset($condition);
 193                         $first_key = key($condition);
 194                         if (!is_int($first_key)) {
 195                                 $condition['iid'] = $pinned;
 196                         } else {
 197                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 198                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 199                                 $condition = array_merge($condition, $pinned);
 200                         }
 201                 }
 202
 203                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 204         }
 205
 206         /**
 207          * returns an activity index from an activity string
 208          *
 209          * @param string $activity activity string
 210          * @return integer Activity index
 211          */
 212         public static function activityToIndex($activity)
 213         {
 214                 $index = array_search($activity, self::ACTIVITIES);
 215
 216                 if (is_bool($index)) {
 217                         $index = -1;
 218                 }
 219
 220                 return $index;
 221         }
 222
 223         /**
 224          * returns an activity string from an activity index
 225          *
 226          * @param integer $index activity index
 227          * @return string Activity string
 228          */
 229         private static function indexToActivity($index)
 230         {
 231                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 232                         return '';
 233                 }
 234
 235                 return self::ACTIVITIES[$index];
 236         }
 237
 238         /**
 239          * Fetch a single item row
 240          *
 241          * @param mixed $stmt statement object
 242          * @return array current row
 243          */
 244         public static function fetch($stmt)
 245         {
 246                 $row = DBA::fetch($stmt);
 247
 248                 if (is_bool($row)) {
 249                         return $row;
 250                 }
 251
 252                 // ---------------------- Transform item structure data ----------------------
 253
 254                 // We prefer the data from the user's contact over the public one
 255                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 256                         ($row['author-link'] == $row['contact-link'])) {
 257                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 258                                 $row['author-avatar'] = $row['contact-avatar'];
 259                         }
 260                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 261                                 $row['author-name'] = $row['contact-name'];
 262                         }
 263                 }
 264
 265                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 266                         ($row['owner-link'] == $row['contact-link'])) {
 267                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 268                                 $row['owner-avatar'] = $row['contact-avatar'];
 269                         }
 270                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 271                                 $row['owner-name'] = $row['contact-name'];
 272                         }
 273                 }
 274
 275                 // We can always comment on posts from these networks
 276                 if (array_key_exists('writable', $row) &&
 277                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 278                         $row['writable'] = true;
 279                 }
 280
 281                 // ---------------------- Transform item content data ----------------------
 282
 283                 // Fetch data from the item-content table whenever there is content there
 284                 if (self::isLegacyMode()) {
 285                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 286                         foreach ($legacy_fields as $field) {
 287                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 288                                         $row[$field] = $row['internal-item-' . $field];
 289                                 }
 290                                 unset($row['internal-item-' . $field]);
 291                         }
 292                 }
 293
 294                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 295                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 296                         if (array_key_exists('title', $row)) {
 297                                 $row['title'] = '';
 298                         }
 299                         if (array_key_exists('body', $row)) {
 300                                 $row['body'] = $row['verb'];
 301                         }
 302                         if (array_key_exists('object', $row)) {
 303                                 $row['object'] = '';
 304                         }
 305                         if (array_key_exists('object-type', $row)) {
 306                                 $row['object-type'] = Activity\ObjectType::NOTE;
 307                         }
 308                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 309                         // Posts don't have a target - but having tags or files.
 310                         // We safe some performance by building tag and file strings only here.
 311                         // We remove the target since they aren't used for this type.
 312                         // In mail posts we do store some mail header data in the object.
 313                         if (array_key_exists('target', $row)) {
 314                                 $row['target'] = '';
 315                         }
 316                 }
 317
 318                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 319                         // Build the tag string out of the term entries
 320                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 321                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 322                         }
 323
 324                         // Build the file string out of the term entries
 325                         if (array_key_exists('file', $row) && empty($row['file'])) {
 326                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 327                         }
 328                 }
 329
 330                 if ($row['internal-psid'] == RepPermissionSet::PUBLIC) {
 331                         if (array_key_exists('allow_cid', $row)) {
 332                                 $row['allow_cid'] = '';
 333                         }
 334                         if (array_key_exists('allow_gid', $row)) {
 335                                 $row['allow_gid'] = '';
 336                         }
 337                         if (array_key_exists('deny_cid', $row)) {
 338                                 $row['deny_cid'] = '';
 339                         }
 340                         if (array_key_exists('deny_gid', $row)) {
 341                                 $row['deny_gid'] = '';
 342                         }
 343                 }
 344
 345                 if (array_key_exists('interaction', $row)) {
 346                         $row['signed_text'] = $row['interaction'];
 347                 }
 348
 349                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 350                         $row['ignored'] = $row['internal-user-ignored'];
 351                 }
 352
 353                 // Remove internal fields
 354                 unset($row['internal-activity']);
 355                 unset($row['internal-network']);
 356                 unset($row['internal-iid']);
 357                 unset($row['internal-psid']);
 358                 unset($row['internal-iaid']);
 359                 unset($row['internal-user-ignored']);
 360                 unset($row['interaction']);
 361
 362                 return $row;
 363         }
 364
 365         /**
 366          * Fills an array with data from an item query
 367          *
 368          * @param object $stmt statement object
 369          * @param bool   $do_close
 370          * @return array Data array
 371          */
 372         public static function inArray($stmt, $do_close = true) {
 373                 if (is_bool($stmt)) {
 374                         return $stmt;
 375                 }
 376
 377                 $data = [];
 378                 while ($row = self::fetch($stmt)) {
 379                         $data[] = $row;
 380                 }
 381                 if ($do_close) {
 382                         DBA::close($stmt);
 383                 }
 384                 return $data;
 385         }
 386
 387         /**
 388          * Check if item data exists
 389          *
 390          * @param array $condition array of fields for condition
 391          *
 392          * @return boolean Are there rows for that condition?
 393          * @throws \Exception
 394          */
 395         public static function exists($condition) {
 396                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 397
 398                 if (is_bool($stmt)) {
 399                         $retval = $stmt;
 400                 } else {
 401                         $retval = (DBA::numRows($stmt) > 0);
 402                 }
 403
 404                 DBA::close($stmt);
 405
 406                 return $retval;
 407         }
 408
 409         /**
 410          * Retrieve a single record from the item table for a given user and returns it in an associative array
 411          *
 412          * @param integer $uid User ID
 413          * @param array   $selected
 414          * @param array   $condition
 415          * @param array   $params
 416          * @return bool|array
 417          * @throws \Exception
 418          * @see   DBA::select
 419          */
 420         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 421         {
 422                 $params['uid'] = $uid;
 423
 424                 if (empty($selected)) {
 425                         $selected = Item::DISPLAY_FIELDLIST;
 426                 }
 427
 428                 return self::selectFirst($selected, $condition, $params);
 429         }
 430
 431         /**
 432          * Select rows from the item table for a given user
 433          *
 434          * @param integer $uid       User ID
 435          * @param array   $selected  Array of selected fields, empty for all
 436          * @param array   $condition Array of fields for condition
 437          * @param array   $params    Array of several parameters
 438          *
 439          * @return boolean|object
 440          * @throws \Exception
 441          */
 442         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 443         {
 444                 $params['uid'] = $uid;
 445
 446                 if (empty($selected)) {
 447                         $selected = Item::DISPLAY_FIELDLIST;
 448                 }
 449
 450                 return self::select($selected, $condition, $params);
 451         }
 452
 453         /**
 454          * Retrieve a single record from the item table and returns it in an associative array
 455          *
 456          * @param array $fields
 457          * @param array $condition
 458          * @param array $params
 459          * @return bool|array
 460          * @throws \Exception
 461          * @see   DBA::select
 462          */
 463         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 464         {
 465                 $params['limit'] = 1;
 466
 467                 $result = self::select($fields, $condition, $params);
 468
 469                 if (is_bool($result)) {
 470                         return $result;
 471                 } else {
 472                         $row = self::fetch($result);
 473                         DBA::close($result);
 474                         return $row;
 475                 }
 476         }
 477
 478         /**
 479          * Select rows from the item table and returns them as an array
 480          *
 481          * @param array $selected  Array of selected fields, empty for all
 482          * @param array $condition Array of fields for condition
 483          * @param array $params    Array of several parameters
 484          *
 485          * @return array
 486          * @throws \Exception
 487          */
 488         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 489         {
 490                 $result = self::select($fields, $condition, $params);
 491
 492                 if (is_bool($result)) {
 493                         return [];
 494                 }
 495
 496                 $data = [];
 497                 while ($row = self::fetch($result)) {
 498                         $data[] = $row;
 499                 }
 500                 DBA::close($result);
 501
 502                 return $data;
 503         }
 504
 505         /**
 506          * Select rows from the item table
 507          *
 508          * @param array $selected  Array of selected fields, empty for all
 509          * @param array $condition Array of fields for condition
 510          * @param array $params    Array of several parameters
 511          *
 512          * @return boolean|object
 513          * @throws \Exception
 514          */
 515         public static function select(array $selected = [], array $condition = [], $params = [])
 516         {
 517                 $uid = 0;
 518                 $usermode = false;
 519
 520                 if (isset($params['uid'])) {
 521                         $uid = $params['uid'];
 522                         $usermode = true;
 523                 }
 524
 525                 $fields = self::fieldlist($usermode);
 526
 527                 $select_fields = self::constructSelectFields($fields, $selected);
 528
 529                 $condition_string = DBA::buildCondition($condition);
 530
 531                 $condition_string = self::addTablesToFields($condition_string, $fields);
 532
 533                 if ($usermode) {
 534                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 535                 }
 536
 537                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 538
 539                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 540
 541                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 542
 543                 return DBA::p($sql, $condition);
 544         }
 545
 546         /**
 547          * Select rows from the starting post in the item table
 548          *
 549          * @param integer $uid       User ID
 550          * @param array   $selected
 551          * @param array   $condition Array of fields for condition
 552          * @param array   $params    Array of several parameters
 553          *
 554          * @return boolean|object
 555          * @throws \Exception
 556          */
 557         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 558         {
 559                 $params['uid'] = $uid;
 560
 561                 if (empty($selected)) {
 562                         $selected = Item::DISPLAY_FIELDLIST;
 563                 }
 564
 565                 return self::selectThread($selected, $condition, $params);
 566         }
 567
 568         /**
 569          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 570          *
 571          * @param integer $uid User ID
 572          * @param array   $selected
 573          * @param array   $condition
 574          * @param array   $params
 575          * @return bool|array
 576          * @throws \Exception
 577          * @see   DBA::select
 578          */
 579         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 580         {
 581                 $params['uid'] = $uid;
 582
 583                 if (empty($selected)) {
 584                         $selected = Item::DISPLAY_FIELDLIST;
 585                 }
 586
 587                 return self::selectFirstThread($selected, $condition, $params);
 588         }
 589
 590         /**
 591          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 592          *
 593          * @param array $fields
 594          * @param array $condition
 595          * @param array $params
 596          * @return bool|array
 597          * @throws \Exception
 598          * @see   DBA::select
 599          */
 600         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 601         {
 602                 $params['limit'] = 1;
 603                 $result = self::selectThread($fields, $condition, $params);
 604
 605                 if (is_bool($result)) {
 606                         return $result;
 607                 } else {
 608                         $row = self::fetch($result);
 609                         DBA::close($result);
 610                         return $row;
 611                 }
 612         }
 613
 614         /**
 615          * Select rows from the starting post in the item table
 616          *
 617          * @param array $selected  Array of selected fields, empty for all
 618          * @param array $condition Array of fields for condition
 619          * @param array $params    Array of several parameters
 620          *
 621          * @return boolean|object
 622          * @throws \Exception
 623          */
 624         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 625         {
 626                 $uid = 0;
 627                 $usermode = false;
 628
 629                 if (isset($params['uid'])) {
 630                         $uid = $params['uid'];
 631                         $usermode = true;
 632                 }
 633
 634                 $fields = self::fieldlist($usermode);
 635
 636                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 637
 638                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 639                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 640                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 641                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 642
 643                 $select_fields = self::constructSelectFields($fields, $selected);
 644
 645                 $condition_string = DBA::buildCondition($condition);
 646
 647                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 648                 $condition_string = self::addTablesToFields($condition_string, $fields);
 649
 650                 if ($usermode) {
 651                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 652                 }
 653
 654                 $param_string = DBA::buildParameter($params);
 655                 $param_string = self::addTablesToFields($param_string, $threadfields);
 656                 $param_string = self::addTablesToFields($param_string, $fields);
 657
 658                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 659
 660                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 661
 662                 return DBA::p($sql, $condition);
 663         }
 664
 665         /**
 666          * Returns a list of fields that are associated with the item table
 667          *
 668          * @param $usermode
 669          * @return array field list
 670          */
 671         private static function fieldlist($usermode)
 672         {
 673                 $fields = [];
 674
 675                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 676                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id',
 677                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 678                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 679                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 680                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 681                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 682                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 683                         'network' => 'internal-network', 'iaid' => 'internal-iaid', 'psid' => 'internal-psid'];
 684
 685                 if ($usermode) {
 686                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 687                 }
 688
 689                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 690
 691                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 692
 693                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 694
 695                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 696
 697                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 698                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 699
 700                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 701                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 702
 703                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 704                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 705                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 706
 707                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 708
 709                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 710
 711                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 712                         'start' => 'event-start','finish' => 'event-finish',
 713                         'summary' => 'event-summary','desc' => 'event-desc',
 714                         'location' => 'event-location', 'type' => 'event-type',
 715                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 716                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 717
 718                 $fields['diaspora-interaction'] = ['interaction'];
 719
 720                 return $fields;
 721         }
 722
 723         /**
 724          * Returns SQL condition for the "select" functions
 725          *
 726          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 727          *
 728          * @return string SQL condition
 729          */
 730         private static function condition($thread_mode)
 731         {
 732                 if ($thread_mode) {
 733                         $master_table = "`thread`";
 734                 } else {
 735                         $master_table = "`item`";
 736                 }
 737                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 738                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 739                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 740                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 741                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 742                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 743                         GRAVITY_PARENT, GRAVITY_PARENT);
 744         }
 745
 746         /**
 747          * Returns all needed "JOIN" commands for the "select" functions
 748          *
 749          * @param integer $uid          User ID
 750          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 751          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 752          *
 753          * @param         $user_mode
 754          * @return string The SQL joins for the "select" functions
 755          */
 756         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 757         {
 758                 if ($thread_mode) {
 759                         $master_table = "`thread`";
 760                         $master_table_key = "`thread`.`iid`";
 761                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 762                 } else {
 763                         $master_table = "`item`";
 764                         $master_table_key = "`item`.`id`";
 765                         $joins = '';
 766                 }
 767
 768                 if ($user_mode) {
 769                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 770                                 AND NOT `contact`.`blocked`
 771                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 772                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 773                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 774                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 775                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 776                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 777                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 778                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 779                 } else {
 780                         if (strpos($sql_commands, "`contact`.") !== false) {
 781                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 782                         }
 783                         if (strpos($sql_commands, "`author`.") !== false) {
 784                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 785                         }
 786                         if (strpos($sql_commands, "`owner`.") !== false) {
 787                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 788                         }
 789                 }
 790
 791                 if (strpos($sql_commands, "`group_member`.") !== false) {
 792                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 793                 }
 794
 795                 if (strpos($sql_commands, "`user`.") !== false) {
 796                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 797                 }
 798
 799                 if (strpos($sql_commands, "`event`.") !== false) {
 800                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 801                 }
 802
 803                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 804                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 805                 }
 806
 807                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 808                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 809                 }
 810
 811                 if (strpos($sql_commands, "`item-content`.") !== false) {
 812                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 813                 }
 814
 815                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 816                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 817                 }
 818
 819                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 820                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 821                 }
 822
 823                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 824                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 825                 }
 826
 827                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 828                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 829                 }
 830
 831                 return $joins;
 832         }
 833
 834         /**
 835          * Add the field list for the "select" functions
 836          *
 837          * @param array $fields The field definition array
 838          * @param array $selected The array with the selected fields from the "select" functions
 839          *
 840          * @return string The field list
 841          */
 842         private static function constructSelectFields(array $fields, array $selected)
 843         {
 844                 if (!empty($selected)) {
 845                         $selected = array_merge($selected, ['internal-iid', 'internal-psid', 'internal-iaid', 'internal-network']);
 846                 }
 847
 848                 if (in_array('verb', $selected)) {
 849                         $selected[] = 'internal-activity';
 850                 }
 851
 852                 if (in_array('ignored', $selected)) {
 853                         $selected[] = 'internal-user-ignored';
 854                 }
 855
 856                 if (in_array('signed_text', $selected)) {
 857                         $selected[] = 'interaction';
 858                 }
 859
 860                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 861
 862                 $selection = [];
 863                 foreach ($fields as $table => $table_fields) {
 864                         foreach ($table_fields as $field => $select) {
 865                                 if (empty($selected) || in_array($select, $selected)) {
 866                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 867                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 868                                         }
 869                                         if (is_int($field)) {
 870                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 871                                         } else {
 872                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 873                                         }
 874                                 }
 875                         }
 876                 }
 877                 return implode(", ", $selection);
 878         }
 879
 880         /**
 881          * add table definition to fields in an SQL query
 882          *
 883          * @param string $query SQL query
 884          * @param array $fields The field definition array
 885          *
 886          * @return string the changed SQL query
 887          */
 888         private static function addTablesToFields($query, $fields)
 889         {
 890                 foreach ($fields as $table => $table_fields) {
 891                         foreach ($table_fields as $alias => $field) {
 892                                 if (is_int($alias)) {
 893                                         $replace_field = $field;
 894                                 } else {
 895                                         $replace_field = $alias;
 896                                 }
 897
 898                                 $search = "/([^\.])`" . $field . "`/i";
 899                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 900                                 $query = preg_replace($search, $replace, $query);
 901                         }
 902                 }
 903                 return $query;
 904         }
 905
 906         /**
 907          * Update existing item entries
 908          *
 909          * @param array $fields    The fields that are to be changed
 910          * @param array $condition The condition for finding the item entries
 911          *
 912          * In the future we may have to change permissions as well.
 913          * Then we had to add the user id as third parameter.
 914          *
 915          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 916          *
 917          * @return integer|boolean number of affected rows - or "false" if there was an error
 918          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 919          */
 920         public static function update(array $fields, array $condition)
 921         {
 922                 if (empty($condition) || empty($fields)) {
 923                         return false;
 924                 }
 925
 926                 // To ensure the data integrity we do it in an transaction
 927                 DBA::transaction();
 928
 929                 // We cannot simply expand the condition to check for origin entries
 930                 // The condition needn't to be a simple array but could be a complex condition.
 931                 // And we have to execute this query before the update to ensure to fetch the same data.
 932                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 933
 934                 $content_fields = [];
 935                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 936                         if (isset($fields[$field])) {
 937                                 $content_fields[$field] = $fields[$field];
 938                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 939                                         unset($fields[$field]);
 940                                 } else {
 941                                         $fields[$field] = null;
 942                                 }
 943                         }
 944                 }
 945
 946                 $delivery_data = ItemDeliveryData::extractFields($fields);
 947
 948                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 949                 foreach ($clear_fields as $field) {
 950                         if (array_key_exists($field, $fields)) {
 951                                 $fields[$field] = null;
 952                         }
 953                 }
 954
 955                 if (array_key_exists('tag', $fields)) {
 956                         $tags = $fields['tag'];
 957                         $fields['tag'] = null;
 958                 } else {
 959                         $tags = null;
 960                 }
 961
 962                 if (array_key_exists('file', $fields)) {
 963                         $files = $fields['file'];
 964                         $fields['file'] = null;
 965                 } else {
 966                         $files = null;
 967                 }
 968
 969                 if (!empty($fields)) {
 970                         $success = DBA::update('item', $fields, $condition);
 971
 972                         if (!$success) {
 973                                 DBA::close($items);
 974                                 DBA::rollback();
 975                                 return false;
 976                         }
 977                 }
 978
 979                 // When there is no content for the "old" item table, this will count the fetched items
 980                 $rows = DBA::affectedRows();
 981
 982                 $notify_items = [];
 983
 984                 while ($item = DBA::fetch($items)) {
 985                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 986                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 987
 988                                 if (empty($item['iaid'])) {
 989                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 990                                         if (DBA::isResult($item_activity)) {
 991                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 992                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 993                                                         if (self::isLegacyMode()) {
 994                                                                 $item_fields[$field] = null;
 995                                                         } else {
 996                                                                 unset($item_fields[$field]);
 997                                                         }
 998                                                 }
 999                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1000
1001                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
1002                                                         DBA::delete('item-content', ['id' => $item['icid']]);
1003                                                 }
1004                                         }
1005                                 } elseif (!empty($item['icid'])) {
1006                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
1007
1008                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
1009                                                 DBA::delete('item-content', ['id' => $item['icid']]);
1010                                         }
1011                                 }
1012                         } else {
1013                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
1014
1015                                 if (empty($item['icid'])) {
1016                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
1017                                         if (DBA::isResult($item_content)) {
1018                                                 $item_fields = ['icid' => $item_content['id']];
1019                                                 // Clear all fields in the item table that have a content in the item-content table
1020                                                 foreach ($item_content as $field => $content) {
1021                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1022                                                                 if (self::isLegacyMode()) {
1023                                                                         $item_fields[$field] = null;
1024                                                                 } else {
1025                                                                         unset($item_fields[$field]);
1026                                                                 }
1027                                                         }
1028                                                 }
1029                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1030                                         }
1031                                 }
1032                         }
1033
1034                         if (!is_null($tags)) {
1035                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1036                                 if (!empty($item['tag'])) {
1037                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1038                                 }
1039                         }
1040
1041                         if (!is_null($files)) {
1042                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1043                                 if (!empty($item['file'])) {
1044                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1045                                 }
1046                         }
1047
1048                         ItemDeliveryData::update($item['id'], $delivery_data);
1049
1050                         self::updateThread($item['id']);
1051
1052                         // We only need to notfiy others when it is an original entry from us.
1053                         // Only call the notifier when the item has some content relevant change.
1054                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1055                                 $notify_items[] = $item['id'];
1056                         }
1057                 }
1058
1059                 DBA::close($items);
1060                 DBA::commit();
1061
1062                 foreach ($notify_items as $notify_item) {
1063                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1064                 }
1065
1066                 return $rows;
1067         }
1068
1069         /**
1070          * Delete an item and notify others about it - if it was ours
1071          *
1072          * @param array   $condition The condition for finding the item entries
1073          * @param integer $priority  Priority for the notification
1074          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1075          */
1076         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
1077         {
1078                 $items = self::select(['id'], $condition);
1079                 while ($item = self::fetch($items)) {
1080                         self::markForDeletionById($item['id'], $priority);
1081                 }
1082                 DBA::close($items);
1083         }
1084
1085         /**
1086          * Delete an item for an user and notify others about it - if it was ours
1087          *
1088          * @param array   $condition The condition for finding the item entries
1089          * @param integer $uid       User who wants to delete this item
1090          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1091          */
1092         public static function deleteForUser($condition, $uid)
1093         {
1094                 if ($uid == 0) {
1095                         return;
1096                 }
1097
1098                 $items = self::select(['id', 'uid'], $condition);
1099                 while ($item = self::fetch($items)) {
1100                         // "Deleting" global items just means hiding them
1101                         if ($item['uid'] == 0) {
1102                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1103
1104                                 // Delete notifications
1105                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1106                         } elseif ($item['uid'] == $uid) {
1107                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
1108                         } else {
1109                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1110                         }
1111                 }
1112                 DBA::close($items);
1113         }
1114
1115         /**
1116          * Mark an item for deletion, delete related data and notify others about it - if it was ours
1117          *
1118          * @param integer $item_id
1119          * @param integer $priority Priority for the notification
1120          *
1121          * @return boolean success
1122          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1123          */
1124         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
1125         {
1126                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
1127                 // locate item to be deleted
1128                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1129                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1130                         'verb', 'object-type', 'object', 'target', 'contact-id',
1131                         'icid', 'iaid', 'psid'];
1132                 $item = self::selectFirst($fields, ['id' => $item_id]);
1133                 if (!DBA::isResult($item)) {
1134                         Logger::info('Item not found.', ['id' => $item_id]);
1135                         return false;
1136                 }
1137
1138                 if ($item['deleted']) {
1139                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1140                         return false;
1141                 }
1142
1143                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1144                 if (!DBA::isResult($parent)) {
1145                         $parent = ['origin' => false];
1146                 }
1147
1148                 // clean up categories and tags so they don't end up as orphans
1149
1150                 $matches = false;
1151                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1152
1153                 if ($cnt) {
1154                         foreach ($matches as $mtch) {
1155                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1156                         }
1157                 }
1158
1159                 $matches = false;
1160
1161                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1162
1163                 if ($cnt) {
1164                         foreach ($matches as $mtch) {
1165                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1166                         }
1167                 }
1168
1169                 /*
1170                  * If item is a link to a photo resource, nuke all the associated photos
1171                  * (visitors will not have photo resources)
1172                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1173                  * generate a resource-id and therefore aren't intimately linked to the item.
1174                  */
1175                 /// @TODO: this should first check if photo is used elsewhere
1176                 if (strlen($item['resource-id'])) {
1177                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1178                 }
1179
1180                 // If item is a link to an event, delete the event.
1181                 if (intval($item['event-id'])) {
1182                         Event::delete($item['event-id']);
1183                 }
1184
1185                 // If item has attachments, drop them
1186                 /// @TODO: this should first check if attachment is used elsewhere
1187                 foreach (explode(",", $item['attach']) as $attach) {
1188                         preg_match("|attach/(\d+)|", $attach, $matches);
1189                         if (is_array($matches) && count($matches) > 1) {
1190                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1191                         }
1192                 }
1193
1194                 // Delete tags that had been attached to other items
1195                 self::deleteTagsFromItem($item);
1196
1197                 // Delete notifications
1198                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1199
1200                 // Set the item to "deleted"
1201                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1202                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1203
1204                 Term::insertFromTagFieldByItemId($item['id'], '');
1205                 Term::insertFromFileFieldByItemId($item['id'], '');
1206                 self::deleteThread($item['id'], $item['parent-uri']);
1207
1208                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1209                         self::markForDeletion(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1210                 }
1211
1212                 ItemDeliveryData::delete($item['id']);
1213
1214                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1215
1216                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1217                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1218                 }
1219                 // When the permission set will be used in photo and events as well,
1220                 // this query here needs to be extended.
1221                 // @todo Currently deactivated. We need the permission set in the deletion process.
1222                 // This is a reminder to add the removal somewhere else.
1223                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1224                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1225                 //}
1226
1227                 // If it's the parent of a comment thread, kill all the kids
1228                 if ($item['id'] == $item['parent']) {
1229                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1230                 }
1231
1232                 // Is it our comment and/or our thread?
1233                 if ($item['origin'] || $parent['origin']) {
1234                         // When we delete the original post we will delete all existing copies on the server as well
1235                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1236
1237                         // send the notification upstream/downstream
1238                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1239                 } elseif ($item['uid'] != 0) {
1240
1241                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1242                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1243                         if (DBA::isResult($global_item)) {
1244                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1245                         }
1246                 }
1247
1248                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1249
1250                 return true;
1251         }
1252
1253         private static function deleteTagsFromItem($item)
1254         {
1255                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1256                         return;
1257                 }
1258
1259                 $xo = XML::parseString($item["object"], false);
1260                 $xt = XML::parseString($item["target"], false);
1261
1262                 if ($xt->type != Activity\ObjectType::NOTE) {
1263                         return;
1264                 }
1265
1266                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1267                 if (!DBA::isResult($i)) {
1268                         return;
1269                 }
1270
1271                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1272                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1273                 $author_copy = $item["origin"];
1274
1275                 if (($owner_remove && $author_copy) || !$owner_remove) {
1276                         return;
1277                 }
1278
1279                 $tags = explode(',', $i["tag"]);
1280                 $newtags = [];
1281                 if (count($tags)) {
1282                         foreach ($tags as $tag) {
1283                                 if (trim($tag) !== trim($xo->body)) {
1284                                        $newtags[] = trim($tag);
1285                                 }
1286                         }
1287                 }
1288                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1289         }
1290
1291         private static function guid($item, $notify)
1292         {
1293                 if (!empty($item['guid'])) {
1294                         return Strings::escapeTags(trim($item['guid']));
1295                 }
1296
1297                 if ($notify) {
1298                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1299                         // We add the hash of our own host because our host is the original creator of the post.
1300                         $prefix_host = DI::baseUrl()->getHostname();
1301                 } else {
1302                         $prefix_host = '';
1303
1304                         // We are only storing the post so we create a GUID from the original hostname.
1305                         if (!empty($item['author-link'])) {
1306                                 $parsed = parse_url($item['author-link']);
1307                                 if (!empty($parsed['host'])) {
1308                                         $prefix_host = $parsed['host'];
1309                                 }
1310                         }
1311
1312                         if (empty($prefix_host) && !empty($item['plink'])) {
1313                                 $parsed = parse_url($item['plink']);
1314                                 if (!empty($parsed['host'])) {
1315                                         $prefix_host = $parsed['host'];
1316                                 }
1317                         }
1318
1319                         if (empty($prefix_host) && !empty($item['uri'])) {
1320                                 $parsed = parse_url($item['uri']);
1321                                 if (!empty($parsed['host'])) {
1322                                         $prefix_host = $parsed['host'];
1323                                 }
1324                         }
1325
1326                         // Is it in the format data@host.tld? - Used for mail contacts
1327                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1328                                 $mailparts = explode('@', $item['author-link']);
1329                                 $prefix_host = array_pop($mailparts);
1330                         }
1331                 }
1332
1333                 if (!empty($item['plink'])) {
1334                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1335                 } elseif (!empty($item['uri'])) {
1336                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1337                 } else {
1338                         $guid = System::createUUID(hash('crc32', $prefix_host));
1339                 }
1340
1341                 return $guid;
1342         }
1343
1344         private static function contactId($item)
1345         {
1346                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1347                         return $item['contact-id'];
1348                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1349                         return $item['contact-id'];
1350                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1351                         return $item['author-id'];
1352                 } elseif (!empty($item['contact-id'])) {
1353                         return $item['contact-id'];
1354                 } else {
1355                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1356                         if (!empty($contact_id)) {
1357                                 return $contact_id;
1358                         }
1359                 }
1360                 return $item['author-id'];
1361         }
1362
1363         // This function will finally cover most of the preparation functionality in mod/item.php
1364         public static function prepare(&$item)
1365         {
1366                 /*
1367                  * @TODO: Unused code triggering inspection errors
1368                  *
1369                 $data = BBCode::getAttachmentData($item['body']);
1370                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1371                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1372                         $posttype = Item::PT_PAGE;
1373                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1374                 }
1375                  */
1376         }
1377
1378         /**
1379          * Write an item array into a spool file to be inserted later.
1380          * This command is called whenever there are issues storing an item.
1381          *
1382          * @param array $item The item fields that are to be inserted
1383          * @throws \Exception
1384          */
1385         private static function spool($orig_item)
1386         {
1387                 // Now we store the data in the spool directory
1388                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1389                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1390
1391                 $spoolpath = get_spoolpath();
1392                 if ($spoolpath != "") {
1393                         $spool = $spoolpath . '/' . $file;
1394
1395                         file_put_contents($spool, json_encode($orig_item));
1396                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1397                 }
1398         }
1399
1400         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1401         {
1402                 $orig_item = $item;
1403
1404                 $priority = PRIORITY_HIGH;
1405
1406                 // If it is a posting where users should get notifications, then define it as wall posting
1407                 if ($notify) {
1408                         $item['wall'] = 1;
1409                         $item['origin'] = 1;
1410                         $item['network'] = Protocol::DFRN;
1411                         $item['protocol'] = Conversation::PARCEL_DFRN;
1412
1413                         if (is_int($notify)) {
1414                                 $priority = $notify;
1415                         }
1416                 } else {
1417                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1418                 }
1419
1420                 $item['guid'] = self::guid($item, $notify);
1421                 $item['uri'] = substr(Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']))), 0, 255);
1422
1423                 // Store URI data
1424                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1425
1426                 // Store conversation data
1427                 $item = Conversation::insert($item);
1428
1429                 /*
1430                  * If a Diaspora signature structure was passed in, pull it out of the
1431                  * item array and set it aside for later storage.
1432                  */
1433
1434                 $dsprsig = null;
1435                 if (isset($item['dsprsig'])) {
1436                         $encoded_signature = $item['dsprsig'];
1437                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1438                         unset($item['dsprsig']);
1439                 }
1440
1441                 $diaspora_signed_text = '';
1442                 if (isset($item['diaspora_signed_text'])) {
1443                         $diaspora_signed_text = $item['diaspora_signed_text'];
1444                         unset($item['diaspora_signed_text']);
1445                 }
1446
1447                 // Converting the plink
1448                 /// @TODO Check if this is really still needed
1449                 if ($item['network'] == Protocol::OSTATUS) {
1450                         if (isset($item['plink'])) {
1451                                 $item['plink'] = OStatus::convertHref($item['plink']);
1452                         } elseif (isset($item['uri'])) {
1453                                 $item['plink'] = OStatus::convertHref($item['uri']);
1454                         }
1455                 }
1456
1457                 if (!empty($item['thr-parent'])) {
1458                         $item['parent-uri'] = $item['thr-parent'];
1459                 }
1460
1461                 $activity = DI::activity();
1462
1463                 if (isset($item['gravity'])) {
1464                         $item['gravity'] = intval($item['gravity']);
1465                 } elseif ($item['parent-uri'] === $item['uri']) {
1466                         $item['gravity'] = GRAVITY_PARENT;
1467                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1468                         $item['gravity'] = GRAVITY_COMMENT;
1469                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1470                         $item['gravity'] = GRAVITY_ACTIVITY;
1471                 } else {
1472                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1473                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1474                 }
1475
1476                 $uid = intval($item['uid']);
1477
1478                 // check for create date and expire time
1479                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1480
1481                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1482                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1483                         $expire_interval = $user['expire'];
1484                 }
1485
1486                 if (($expire_interval > 0) && !empty($item['created'])) {
1487                         $expire_date = time() - ($expire_interval * 86400);
1488                         $created_date = strtotime($item['created']);
1489                         if ($created_date < $expire_date) {
1490                                 Logger::notice('Item created before expiration interval.', [
1491                                         'created' => date('c', $created_date),
1492                                         'expired' => date('c', $expire_date),
1493                                         '$item' => $item
1494                                 ]);
1495                                 return 0;
1496                         }
1497                 }
1498
1499                 /*
1500                  * Do we already have this item?
1501                  * We have to check several networks since Friendica posts could be repeated
1502                  * via OStatus (maybe Diasporsa as well)
1503                  */
1504                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1505                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1506                                 trim($item['uri']), $item['uid'],
1507                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1508                         $existing = self::selectFirst(['id', 'network'], $condition);
1509                         if (DBA::isResult($existing)) {
1510                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1511                                 if ($uid != 0) {
1512                                         Logger::notice('Item already existed for user', [
1513                                                 'uri' => $item['uri'],
1514                                                 'uid' => $uid,
1515                                                 'network' => $item['network'],
1516                                                 'existing_id' => $existing["id"],
1517                                                 'existing_network' => $existing["network"]
1518                                         ]);
1519                                 }
1520
1521                                 return $existing["id"];
1522                         }
1523                 }
1524
1525                 $item['wall']          = intval($item['wall'] ?? 0);
1526                 $item['extid']         = trim($item['extid'] ?? '');
1527                 $item['author-name']   = trim($item['author-name'] ?? '');
1528                 $item['author-link']   = trim($item['author-link'] ?? '');
1529                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1530                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1531                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1532                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1533                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1534                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1535                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1536                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1537                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1538                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
1539                 $item['location']      = trim($item['location'] ?? '');
1540                 $item['coord']         = trim($item['coord'] ?? '');
1541                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1542                 $item['deleted']       = 0;
1543                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1544                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1545                 $item['verb']          = trim($item['verb'] ?? '');
1546                 $item['object-type']   = trim($item['object-type'] ?? '');
1547                 $item['object']        = trim($item['object'] ?? '');
1548                 $item['target-type']   = trim($item['target-type'] ?? '');
1549                 $item['target']        = trim($item['target'] ?? '');
1550                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
1551                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1552                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1553                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1554                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1555                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1556                 $item['body']          = trim($item['body'] ?? '');
1557                 $item['tag']           = trim($item['tag'] ?? '');
1558                 $item['attach']        = trim($item['attach'] ?? '');
1559                 $item['app']           = trim($item['app'] ?? '');
1560                 $item['origin']        = intval($item['origin'] ?? 0);
1561                 $item['postopts']      = trim($item['postopts'] ?? '');
1562                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1563                 $item['event-id']      = intval($item['event-id'] ?? 0);
1564                 $item['inform']        = trim($item['inform'] ?? '');
1565                 $item['file']          = trim($item['file'] ?? '');
1566
1567                 // When there is no content then we don't post it
1568                 if ($item['body'].$item['title'] == '') {
1569                         Logger::notice('No body, no title.');
1570                         return 0;
1571                 }
1572
1573                 self::addLanguageToItemArray($item);
1574
1575                 // Items cannot be stored before they happen ...
1576                 if ($item['created'] > DateTimeFormat::utcNow()) {
1577                         $item['created'] = DateTimeFormat::utcNow();
1578                 }
1579
1580                 // We haven't invented time travel by now.
1581                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1582                         $item['edited'] = DateTimeFormat::utcNow();
1583                 }
1584
1585                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1586
1587                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1588                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1589
1590                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1591
1592                 if (Contact::isBlocked($item['author-id'])) {
1593                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1594                         return 0;
1595                 }
1596
1597                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1598                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1599                         return 0;
1600                 }
1601
1602                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1603                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1604                         return 0;
1605                 }
1606
1607                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1608                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1609
1610                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1611
1612                 if (Contact::isBlocked($item['owner-id'])) {
1613                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1614                         return 0;
1615                 }
1616
1617                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1618                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1619                         return 0;
1620                 }
1621
1622                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1623                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1624                         return 0;
1625                 }
1626
1627                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1628                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1629                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1630                         return 0;
1631                 }
1632
1633                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1634                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1635                         return 0;
1636                 }
1637
1638                 // We don't store the causer, we only have it here for the checks above
1639                 unset($item['causer-id']);
1640                 unset($item['causer-link']);
1641
1642                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1643                 $item["contact-id"] = self::contactId($item);
1644
1645                 if ($item['network'] == Protocol::PHANTOM) {
1646                         $item['network'] = Protocol::DFRN;
1647                         Logger::notice('Missing network, setting to {network}.', [
1648                                 'uri' => $item["uri"],
1649                                 'network' => $item['network'],
1650                                 'callstack' => System::callstack()
1651                         ]);
1652                 }
1653
1654                 // Checking if there is already an item with the same guid
1655                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1656                 if (self::exists($condition)) {
1657                         Logger::notice('Found already existing item', [
1658                                 'guid' => $item['guid'],
1659                                 'uid' => $item['uid'],
1660                                 'network' => $item['network']
1661                         ]);
1662                         return 0;
1663                 }
1664
1665                 if ($item['verb'] == Activity::FOLLOW) {
1666                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1667                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1668                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1669                                 return 0;
1670                         }
1671
1672                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1673                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1674                         if (self::exists($condition)) {
1675                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1676                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1677                                 return 0;
1678                         }
1679                 }
1680
1681                 // Check for hashtags in the body and repair or add hashtag links
1682                 self::setHashtags($item);
1683
1684                 $item['thr-parent'] = $item['parent-uri'];
1685
1686                 $notify_type = Delivery::POST;
1687                 $allow_cid = '';
1688                 $allow_gid = '';
1689                 $deny_cid  = '';
1690                 $deny_gid  = '';
1691
1692                 if ($item['parent-uri'] === $item['uri']) {
1693                         $parent_id = 0;
1694                         $parent_deleted = 0;
1695                         $allow_cid = $item['allow_cid'];
1696                         $allow_gid = $item['allow_gid'];
1697                         $deny_cid  = $item['deny_cid'];
1698                         $deny_gid  = $item['deny_gid'];
1699                 } else {
1700                         // find the parent and snarf the item id and ACLs
1701                         // and anything else we need to inherit
1702
1703                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1704                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1705                                 'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1706                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1707                         $params = ['order' => ['id' => false]];
1708                         $parent = self::selectFirst($fields, $condition, $params);
1709
1710                         if (DBA::isResult($parent)) {
1711                                 // is the new message multi-level threaded?
1712                                 // even though we don't support it now, preserve the info
1713                                 // and re-attach to the conversation parent.
1714
1715                                 if ($parent['uri'] != $parent['parent-uri']) {
1716                                         $item['parent-uri'] = $parent['parent-uri'];
1717
1718                                         $condition = ['uri' => $item['parent-uri'],
1719                                                 'parent-uri' => $item['parent-uri'],
1720                                                 'uid' => $item['uid']];
1721                                         $params = ['order' => ['id' => false]];
1722                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1723
1724                                         if (DBA::isResult($toplevel_parent)) {
1725                                                 $parent = $toplevel_parent;
1726                                         }
1727                                 }
1728
1729                                 $parent_id      = $parent['id'];
1730                                 $parent_deleted = $parent['deleted'];
1731                                 $allow_cid      = $parent['allow_cid'];
1732                                 $allow_gid      = $parent['allow_gid'];
1733                                 $deny_cid       = $parent['deny_cid'];
1734                                 $deny_gid       = $parent['deny_gid'];
1735                                 $item['wall']   = $parent['wall'];
1736
1737                                 /*
1738                                  * If the parent is private, force privacy for the entire conversation
1739                                  * This differs from the above settings as it subtly allows comments from
1740                                  * email correspondents to be private even if the overall thread is not.
1741                                  */
1742                                 if ($parent['private']) {
1743                                         $item['private'] = $parent['private'];
1744                                 }
1745
1746                                 /*
1747                                  * Edge case. We host a public forum that was originally posted to privately.
1748                                  * The original author commented, but as this is a comment, the permissions
1749                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1750                                  */
1751                                 if ((intval($parent['forum_mode']) == 1) && ($parent['private'] != self::PUBLIC)) {
1752                                         $item['private'] = self::PUBLIC;
1753                                 }
1754
1755                                 // If its a post that originated here then tag the thread as "mention"
1756                                 if ($item['origin'] && $item['uid']) {
1757                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1758                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1759                                 }
1760
1761                                 // Update the contact relations
1762                                 if ($item['author-id'] != $parent['author-id']) {
1763                                         DBA::update('contact-relation', ['last-interaction' => $item['created']], ['cid' => $parent['author-id'], 'relation-cid' => $item['author-id']], true);
1764                                 }
1765                         } else {
1766                                 /*
1767                                  * Allow one to see reply tweets from status.net even when
1768                                  * we don't have or can't see the original post.
1769                                  */
1770                                 if ($force_parent) {
1771                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1772                                         $parent_id = 0;
1773                                         $item['parent-uri'] = $item['uri'];
1774                                         $item['gravity'] = GRAVITY_PARENT;
1775                                 } else {
1776                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1777                                         return 0;
1778                                 }
1779
1780                                 $parent_deleted = 0;
1781                         }
1782                 }
1783
1784                 if (stristr($item['verb'], Activity::POKE)) {
1785                         $notify_type = Delivery::POKE;
1786                 }
1787
1788                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1789                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1790
1791                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1792                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1793                 if (self::exists($condition)) {
1794                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1795                         return 0;
1796                 }
1797
1798                 // On Friendica and Diaspora the GUID is unique
1799                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1800                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1801                         if (self::exists($condition)) {
1802                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1803                                 return 0;
1804                         }
1805                 } elseif ($item['network'] == Protocol::OSTATUS) {
1806                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1807                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1808                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1809                         if (self::exists($condition)) {
1810                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1811                                 return 0;
1812                         }
1813                 }
1814
1815                 // Is this item available in the global items (with uid=0)?
1816                 if ($item["uid"] == 0) {
1817                         $item["global"] = true;
1818
1819                         // Set the global flag on all items if this was a global item entry
1820                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1821                 } else {
1822                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1823                 }
1824
1825                 // ACL settings
1826                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1827                         $private = self::PRIVATE;
1828                 } else {
1829                         $private = $item['private'];
1830                 }
1831
1832                 $item["allow_cid"] = $allow_cid;
1833                 $item["allow_gid"] = $allow_gid;
1834                 $item["deny_cid"] = $deny_cid;
1835                 $item["deny_gid"] = $deny_gid;
1836                 $item["private"] = $private;
1837                 $item["deleted"] = $parent_deleted;
1838
1839                 // Fill the cache field
1840                 self::putInCache($item);
1841
1842                 if ($notify) {
1843                         $item['edit'] = false;
1844                         $item['parent'] = $parent_id;
1845                         Hook::callAll('post_local', $item);
1846                         unset($item['edit']);
1847                         unset($item['parent']);
1848                 } else {
1849                         Hook::callAll('post_remote', $item);
1850                 }
1851
1852                 // This array field is used to trigger some automatic reactions
1853                 // It is mainly used in the "post_local" hook.
1854                 unset($item['api_source']);
1855
1856                 if (!empty($item['cancel'])) {
1857                         Logger::log('post cancelled by addon.');
1858                         return 0;
1859                 }
1860
1861                 /*
1862                  * Check for already added items.
1863                  * There is a timing issue here that sometimes creates double postings.
1864                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1865                  */
1866                 if ($item["uid"] == 0) {
1867                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1868                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1869                                 return 0;
1870                         }
1871                 }
1872
1873                 Logger::log('' . print_r($item,true), Logger::DATA);
1874
1875                 if (array_key_exists('tag', $item)) {
1876                         $tags = $item['tag'];
1877                         unset($item['tag']);
1878                 } else {
1879                         $tags = '';
1880                 }
1881
1882                 if (array_key_exists('file', $item)) {
1883                         $files = $item['file'];
1884                         unset($item['file']);
1885                 } else {
1886                         $files = '';
1887                 }
1888
1889                 // Creates or assigns the permission set
1890                 $item['psid'] = PermissionSet::getIdFromACL(
1891                         $item['uid'],
1892                         $item['allow_cid'],
1893                         $item['allow_gid'],
1894                         $item['deny_cid'],
1895                         $item['deny_gid']
1896                 );
1897
1898                 $item['allow_cid'] = null;
1899                 $item['allow_gid'] = null;
1900                 $item['deny_cid'] = null;
1901                 $item['deny_gid'] = null;
1902
1903                 // We are doing this outside of the transaction to avoid timing problems
1904                 if (!self::insertActivity($item)) {
1905                         self::insertContent($item);
1906                 }
1907
1908                 $delivery_data = ItemDeliveryData::extractFields($item);
1909
1910                 unset($item['postopts']);
1911                 unset($item['inform']);
1912
1913                 // These fields aren't stored anymore in the item table, they are fetched upon request
1914                 unset($item['author-link']);
1915                 unset($item['author-name']);
1916                 unset($item['author-avatar']);
1917                 unset($item['author-network']);
1918
1919                 unset($item['owner-link']);
1920                 unset($item['owner-name']);
1921                 unset($item['owner-avatar']);
1922
1923                 $like_no_comment = DI::config()->get('system', 'like_no_comment');
1924
1925                 DBA::transaction();
1926                 $ret = DBA::insert('item', $item);
1927
1928                 // When the item was successfully stored we fetch the ID of the item.
1929                 if (DBA::isResult($ret)) {
1930                         $current_post = DBA::lastInsertId();
1931                 } else {
1932                         // This can happen - for example - if there are locking timeouts.
1933                         DBA::rollback();
1934
1935                         // Store the data into a spool file so that we can try again later.
1936                         self::spool($orig_item);
1937                         return 0;
1938                 }
1939
1940                 if ($current_post == 0) {
1941                         // This is one of these error messages that never should occur.
1942                         Logger::log("couldn't find created item - we better quit now.");
1943                         DBA::rollback();
1944                         return 0;
1945                 }
1946
1947                 // How much entries have we created?
1948                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1949                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1950
1951                 if ($entries > 1) {
1952                         // There are duplicates. We delete our just created entry.
1953                         Logger::info('Delete duplicated item', ['id' => $current_post, 'uri' => $item['uri'], 'uid' => $item['uid'], 'guid' => $item['guid']]);
1954
1955                         // Yes, we could do a rollback here - but we possibly are still having users with MyISAM.
1956                         DBA::delete('item', ['id' => $current_post]);
1957                         DBA::commit();
1958                         return 0;
1959                 } elseif ($entries == 0) {
1960                         // This really should never happen since we quit earlier if there were problems.
1961                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1962                         DBA::rollback();
1963                         return 0;
1964                 }
1965
1966                 Logger::log('created item '.$current_post);
1967
1968                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1969                         $parent_id = $current_post;
1970                 }
1971
1972                 // Set parent id
1973                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1974
1975                 $item['id'] = $current_post;
1976                 $item['parent'] = $parent_id;
1977
1978                 // update the commented timestamp on the parent
1979                 // Only update "commented" if it is really a comment
1980                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1981                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1982                 } else {
1983                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1984                 }
1985
1986                 if ($dsprsig) {
1987                         /*
1988                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1989                          * We can check for this condition when we decode and encode the stuff again.
1990                          */
1991                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1992                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1993                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1994                         }
1995
1996                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1997                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1998                         }
1999                 }
2000
2001                 if (!empty($diaspora_signed_text)) {
2002                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
2003                 }
2004
2005                 if ($item['parent-uri'] === $item['uri']) {
2006                         self::addThread($current_post);
2007                 } else {
2008                         self::updateThread($parent_id);
2009                 }
2010
2011                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
2012                         ItemDeliveryData::insert($current_post, $delivery_data);
2013                 }
2014
2015                 DBA::commit();
2016
2017                 /*
2018                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
2019                  * This is not perfect - but a workable solution until we found the reason for the problem.
2020                  */
2021                 if (!empty($tags)) {
2022                         Term::insertFromTagFieldByItemId($current_post, $tags);
2023                 }
2024
2025                 if (!empty($files)) {
2026                         Term::insertFromFileFieldByItemId($current_post, $files);
2027                 }
2028
2029                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
2030                 if (self::tagDeliver($item['uid'], $current_post)) {
2031                         // Get the user information for the logging
2032                         $user = User::getById($uid);
2033
2034                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
2035                         return 0;
2036                 }
2037
2038                 if (!$dontcache) {
2039                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2040                         if (DBA::isResult($posted_item)) {
2041                                 if ($notify) {
2042                                         Hook::callAll('post_local_end', $posted_item);
2043                                 } else {
2044                                         Hook::callAll('post_remote_end', $posted_item);
2045                                 }
2046                         } else {
2047                                 Logger::log('new item not found in DB, id ' . $current_post);
2048                         }
2049                 }
2050
2051                 if ($item['parent-uri'] === $item['uri']) {
2052                         self::addShadow($current_post);
2053                 } else {
2054                         self::addShadowPost($current_post);
2055                 }
2056
2057                 self::updateContact($item);
2058
2059                 UserItem::setNotification($current_post);
2060
2061                 check_user_notification($current_post);
2062
2063                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2064                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2065                 }
2066
2067                 return $current_post;
2068         }
2069
2070         /**
2071          * Insert a new item content entry
2072          *
2073          * @param array $item The item fields that are to be inserted
2074          * @return bool
2075          * @throws \Exception
2076          */
2077         private static function insertActivity(&$item)
2078         {
2079                 $activity_index = self::activityToIndex($item['verb']);
2080
2081                 if ($activity_index < 0) {
2082                         return false;
2083                 }
2084
2085                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2086
2087                 // We just remove everything that is content
2088                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2089                         unset($item[$field]);
2090                 }
2091
2092                 // To avoid timing problems, we are using locks.
2093                 $locked = DI::lock()->acquire('item_insert_activity');
2094                 if (!$locked) {
2095                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2096                 }
2097
2098                 // Do we already have this content?
2099                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2100                 if (DBA::isResult($item_activity)) {
2101                         $item['iaid'] = $item_activity['id'];
2102                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2103                 } elseif (DBA::insert('item-activity', $fields)) {
2104                         $item['iaid'] = DBA::lastInsertId();
2105                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2106                 } else {
2107                         // This shouldn't happen.
2108                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2109                         DI::lock()->release('item_insert_activity');
2110                         return false;
2111                 }
2112                 if ($locked) {
2113                         DI::lock()->release('item_insert_activity');
2114                 }
2115                 return true;
2116         }
2117
2118         /**
2119          * Insert a new item content entry
2120          *
2121          * @param array $item The item fields that are to be inserted
2122          * @throws \Exception
2123          */
2124         private static function insertContent(&$item)
2125         {
2126                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2127
2128                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2129                         if (isset($item[$field])) {
2130                                 $fields[$field] = $item[$field];
2131                                 unset($item[$field]);
2132                         }
2133                 }
2134
2135                 // To avoid timing problems, we are using locks.
2136                 $locked = DI::lock()->acquire('item_insert_content');
2137                 if (!$locked) {
2138                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2139                 }
2140
2141                 // Do we already have this content?
2142                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2143                 if (DBA::isResult($item_content)) {
2144                         $item['icid'] = $item_content['id'];
2145                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2146                 } elseif (DBA::insert('item-content', $fields)) {
2147                         $item['icid'] = DBA::lastInsertId();
2148                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2149                 } else {
2150                         // This shouldn't happen.
2151                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2152                 }
2153                 if ($locked) {
2154                         DI::lock()->release('item_insert_content');
2155                 }
2156         }
2157
2158         /**
2159          * Update existing item content entries
2160          *
2161          * @param array $item      The item fields that are to be changed
2162          * @param array $condition The condition for finding the item content entries
2163          * @return bool
2164          * @throws \Exception
2165          */
2166         private static function updateActivity($item, $condition)
2167         {
2168                 if (empty($item['verb'])) {
2169                         return false;
2170                 }
2171                 $activity_index = self::activityToIndex($item['verb']);
2172
2173                 if ($activity_index < 0) {
2174                         return false;
2175                 }
2176
2177                 $fields = ['activity' => $activity_index];
2178
2179                 Logger::log('Update activity for ' . json_encode($condition));
2180
2181                 DBA::update('item-activity', $fields, $condition, true);
2182
2183                 return true;
2184         }
2185
2186         /**
2187          * Update existing item content entries
2188          *
2189          * @param array $item      The item fields that are to be changed
2190          * @param array $condition The condition for finding the item content entries
2191          * @throws \Exception
2192          */
2193         private static function updateContent($item, $condition)
2194         {
2195                 // We have to select only the fields from the "item-content" table
2196                 $fields = [];
2197                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2198                         if (isset($item[$field])) {
2199                                 $fields[$field] = $item[$field];
2200                         }
2201                 }
2202
2203                 if (empty($fields)) {
2204                         // when there are no fields at all, just use the condition
2205                         // This is to ensure that we always store content.
2206                         $fields = $condition;
2207                 }
2208
2209                 Logger::log('Update content for ' . json_encode($condition));
2210
2211                 DBA::update('item-content', $fields, $condition, true);
2212         }
2213
2214         /**
2215          * Distributes public items to the receivers
2216          *
2217          * @param integer $itemid      Item ID that should be added
2218          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2219          * @throws \Exception
2220          */
2221         public static function distribute($itemid, $signed_text = '')
2222         {
2223                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2224                 $parent = self::selectFirst(['owner-id'], $condition);
2225                 if (!DBA::isResult($parent)) {
2226                         return;
2227                 }
2228
2229                 // Only distribute public items from native networks
2230                 $condition = ['id' => $itemid, 'uid' => 0,
2231                         'network' => array_merge(Protocol::FEDERATED ,['']),
2232                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2233                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2234                 if (!DBA::isResult($item)) {
2235                         return;
2236                 }
2237
2238                 $origin = $item['origin'];
2239
2240                 unset($item['id']);
2241                 unset($item['parent']);
2242                 unset($item['mention']);
2243                 unset($item['wall']);
2244                 unset($item['origin']);
2245                 unset($item['starred']);
2246
2247                 $users = [];
2248
2249                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2250                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2251                 if (!DBA::isResult($owner)) {
2252                         return;
2253                 }
2254
2255                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2256                 $contacts = DBA::select('contact', ['uid'], $condition);
2257                 while ($contact = DBA::fetch($contacts)) {
2258                         if ($contact['uid'] == 0) {
2259                                 continue;
2260                         }
2261
2262                         $users[$contact['uid']] = $contact['uid'];
2263                 }
2264                 DBA::close($contacts);
2265
2266                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2267                 $contacts = DBA::select('contact', ['uid'], $condition);
2268                 while ($contact = DBA::fetch($contacts)) {
2269                         if ($contact['uid'] == 0) {
2270                                 continue;
2271                         }
2272
2273                         $users[$contact['uid']] = $contact['uid'];
2274                 }
2275                 DBA::close($contacts);
2276
2277                 if (!empty($owner['alias'])) {
2278                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2279                         $contacts = DBA::select('contact', ['uid'], $condition);
2280                         while ($contact = DBA::fetch($contacts)) {
2281                                 if ($contact['uid'] == 0) {
2282                                         continue;
2283                                 }
2284
2285                                 $users[$contact['uid']] = $contact['uid'];
2286                         }
2287                         DBA::close($contacts);
2288                 }
2289
2290                 $origin_uid = 0;
2291
2292                 if ($item['uri'] != $item['parent-uri']) {
2293                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2294                         while ($parent = self::fetch($parents)) {
2295                                 $users[$parent['uid']] = $parent['uid'];
2296                                 if ($parent['origin'] && !$origin) {
2297                                         $origin_uid = $parent['uid'];
2298                                 }
2299                         }
2300                 }
2301
2302                 foreach ($users as $uid) {
2303                         if ($origin_uid == $uid) {
2304                                 $item['diaspora_signed_text'] = $signed_text;
2305                         }
2306                         self::storeForUser($itemid, $item, $uid);
2307                 }
2308         }
2309
2310         /**
2311          * Store public items for the receivers
2312          *
2313          * @param integer $itemid Item ID that should be added
2314          * @param array   $item   The item entry that will be stored
2315          * @param integer $uid    The user that will receive the item entry
2316          * @throws \Exception
2317          */
2318         private static function storeForUser($itemid, $item, $uid)
2319         {
2320                 $item['uid'] = $uid;
2321                 $item['origin'] = 0;
2322                 $item['wall'] = 0;
2323                 if ($item['uri'] == $item['parent-uri']) {
2324                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2325                 } else {
2326                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2327                 }
2328
2329                 if (empty($item['contact-id'])) {
2330                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2331                         if (!DBA::isResult($self)) {
2332                                 return;
2333                         }
2334                         $item['contact-id'] = $self['id'];
2335                 }
2336
2337                 /// @todo Handling of "event-id"
2338
2339                 $notify = false;
2340                 if ($item['uri'] == $item['parent-uri']) {
2341                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2342                         if (DBA::isResult($contact)) {
2343                                 $notify = self::isRemoteSelf($contact, $item);
2344                         }
2345                 }
2346
2347                 $distributed = self::insert($item, false, $notify, true);
2348
2349                 if (!$distributed) {
2350                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2351                 } else {
2352                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2353                 }
2354         }
2355
2356         /**
2357          * Add a shadow entry for a given item id that is a thread starter
2358          *
2359          * We store every public item entry additionally with the user id "0".
2360          * This is used for the community page and for the search.
2361          * It is planned that in the future we will store public item entries only once.
2362          *
2363          * @param integer $itemid Item ID that should be added
2364          * @throws \Exception
2365          */
2366         public static function addShadow($itemid)
2367         {
2368                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2369                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2370                 $item = self::selectFirst($fields, $condition);
2371
2372                 if (!DBA::isResult($item)) {
2373                         return;
2374                 }
2375
2376                 // is it already a copy?
2377                 if (($itemid == 0) || ($item['uid'] == 0)) {
2378                         return;
2379                 }
2380
2381                 // Is it a visible public post?
2382                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2383                         return;
2384                 }
2385
2386                 // is it an entry from a connector? Only add an entry for natively connected networks
2387                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2388                         return;
2389                 }
2390
2391                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2392                         return;
2393                 }
2394
2395                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2396
2397                 if (DBA::isResult($item)) {
2398                         // Preparing public shadow (removing user specific data)
2399                         $item['uid'] = 0;
2400                         unset($item['id']);
2401                         unset($item['parent']);
2402                         unset($item['wall']);
2403                         unset($item['mention']);
2404                         unset($item['origin']);
2405                         unset($item['starred']);
2406                         unset($item['postopts']);
2407                         unset($item['inform']);
2408                         if ($item['uri'] == $item['parent-uri']) {
2409                                 $item['contact-id'] = $item['owner-id'];
2410                         } else {
2411                                 $item['contact-id'] = $item['author-id'];
2412                         }
2413
2414                         $public_shadow = self::insert($item, false, false, true);
2415
2416                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2417                 }
2418         }
2419
2420         /**
2421          * Add a shadow entry for a given item id that is a comment
2422          *
2423          * This function does the same like the function above - but for comments
2424          *
2425          * @param integer $itemid Item ID that should be added
2426          * @throws \Exception
2427          */
2428         public static function addShadowPost($itemid)
2429         {
2430                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2431                 if (!DBA::isResult($item)) {
2432                         return;
2433                 }
2434
2435                 // Is it a toplevel post?
2436                 if ($item['id'] == $item['parent']) {
2437                         self::addShadow($itemid);
2438                         return;
2439                 }
2440
2441                 // Is this a shadow entry?
2442                 if ($item['uid'] == 0) {
2443                         return;
2444                 }
2445
2446                 // Is there a shadow parent?
2447                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2448                         return;
2449                 }
2450
2451                 // Is there already a shadow entry?
2452                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2453                         return;
2454                 }
2455
2456                 // Save "origin" and "parent" state
2457                 $origin = $item['origin'];
2458                 $parent = $item['parent'];
2459
2460                 // Preparing public shadow (removing user specific data)
2461                 $item['uid'] = 0;
2462                 unset($item['id']);
2463                 unset($item['parent']);
2464                 unset($item['wall']);
2465                 unset($item['mention']);
2466                 unset($item['origin']);
2467                 unset($item['starred']);
2468                 unset($item['postopts']);
2469                 unset($item['inform']);
2470                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2471
2472                 $public_shadow = self::insert($item, false, false, true);
2473
2474                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2475
2476                 // If this was a comment to a Diaspora post we don't get our comment back.
2477                 // This means that we have to distribute the comment by ourselves.
2478                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2479                         self::distribute($public_shadow);
2480                 }
2481         }
2482
2483         /**
2484          * Adds a language specification in a "language" element of given $arr.
2485          * Expects "body" element to exist in $arr.
2486          *
2487          * @param $item
2488          * @throws \Text_LanguageDetect_Exception
2489          */
2490         private static function addLanguageToItemArray(&$item)
2491         {
2492                 $naked_body = BBCode::toPlaintext($item['body'], false);
2493
2494                 $ld = new Text_LanguageDetect();
2495                 $ld->setNameMode(2);
2496                 $languages = $ld->detect($naked_body, 3);
2497
2498                 if (is_array($languages)) {
2499                         $item['language'] = json_encode($languages);
2500                 }
2501         }
2502
2503         /**
2504          * Creates an unique guid out of a given uri
2505          *
2506          * @param string $uri uri of an item entry
2507          * @param string $host hostname for the GUID prefix
2508          * @return string unique guid
2509          */
2510         public static function guidFromUri($uri, $host)
2511         {
2512                 // Our regular guid routine is using this kind of prefix as well
2513                 // We have to avoid that different routines could accidentally create the same value
2514                 $parsed = parse_url($uri);
2515
2516                 // We use a hash of the hostname as prefix for the guid
2517                 $guid_prefix = hash("crc32", $host);
2518
2519                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2520                 unset($parsed["scheme"]);
2521
2522                 // Glue it together to be able to make a hash from it
2523                 $host_id = implode("/", $parsed);
2524
2525                 // We could use any hash algorithm since it isn't a security issue
2526                 $host_hash = hash("ripemd128", $host_id);
2527
2528                 return $guid_prefix.$host_hash;
2529         }
2530
2531         /**
2532          * generate an unique URI
2533          *
2534          * @param integer $uid  User id
2535          * @param string  $guid An existing GUID (Otherwise it will be generated)
2536          *
2537          * @return string
2538          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2539          */
2540         public static function newURI($uid, $guid = "")
2541         {
2542                 if ($guid == "") {
2543                         $guid = System::createUUID();
2544                 }
2545
2546                 return DI::baseUrl()->get() . '/objects/' . $guid;
2547         }
2548
2549         /**
2550          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2551          *
2552          * This can be used to filter for inactive contacts.
2553          * Only do this for public postings to avoid privacy problems, since poco data is public.
2554          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2555          *
2556          * @param array $arr Contains the just posted item record
2557          * @throws \Exception
2558          */
2559         private static function updateContact($arr)
2560         {
2561                 // Unarchive the author
2562                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2563                 if (DBA::isResult($contact)) {
2564                         Contact::unmarkForArchival($contact);
2565                 }
2566
2567                 // Unarchive the contact if it's not our own contact
2568                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2569                 if (DBA::isResult($contact)) {
2570                         Contact::unmarkForArchival($contact);
2571                 }
2572
2573                 $update = (($arr['private'] != self::PRIVATE) && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2574
2575                 // Is it a forum? Then we don't care about the rules from above
2576                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2577                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2578                                 $update = true;
2579                         }
2580                 }
2581
2582                 if ($update) {
2583                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2584                                 ['id' => $arr['contact-id']]);
2585                 }
2586                 // Now do the same for the system wide contacts with uid=0
2587                 if ($arr['private'] != self::PRIVATE) {
2588                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2589                                 ['id' => $arr['owner-id']]);
2590
2591                         if ($arr['owner-id'] != $arr['author-id']) {
2592                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2593                                         ['id' => $arr['author-id']]);
2594                         }
2595                 }
2596         }
2597
2598         public static function setHashtags(&$item)
2599         {
2600                 $tags = BBCode::getTags($item["body"]);
2601
2602                 // No hashtags?
2603                 if (!count($tags)) {
2604                         return false;
2605                 }
2606
2607                 // What happens in [code], stays in [code]!
2608                 // escape the # and the [
2609                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2610                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2611                         function ($match) {
2612                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2613                                 $find = ['#', '['];
2614                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2615                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2616                         }, $item["body"]);
2617
2618                 // This sorting is important when there are hashtags that are part of other hashtags
2619                 // Otherwise there could be problems with hashtags like #test and #test2
2620                 rsort($tags);
2621
2622                 $URLSearchString = "^\[\]";
2623
2624                 // All hashtags should point to the home server if "local_tags" is activated
2625                 if (DI::config()->get('system', 'local_tags')) {
2626                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2627                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2628
2629                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2630                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2631                 }
2632
2633                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2634                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2635                         function ($match) {
2636                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2637                         }, $item["body"]);
2638
2639                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2640                         function ($match) {
2641                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2642                         }, $item["body"]);
2643
2644                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2645                         function ($match) {
2646                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2647                         }, $item["body"]);
2648
2649                 // Repair recursive urls
2650                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2651                                 "&num;$2", $item["body"]);
2652
2653                 foreach ($tags as $tag) {
2654                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2655                                 continue;
2656                         }
2657
2658                         $basetag = str_replace('_',' ',substr($tag,1));
2659                         $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2660
2661                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2662
2663                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2664                                 if (strlen($item["tag"])) {
2665                                         $item["tag"] = ',' . $item["tag"];
2666                                 }
2667                                 $item["tag"] = $newtag . $item["tag"];
2668                         }
2669                 }
2670
2671                 // Convert back the masked hashtags
2672                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2673
2674                 // Remember! What happens in [code], stays in [code]
2675                 // roleback the # and [
2676                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2677                         function ($match) {
2678                                 // we truly unESCape all sharp and leftsquarebracket
2679                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2680                                 $replace = ['#', '['];
2681                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2682                         }, $item["body"]);
2683         }
2684
2685         /**
2686          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2687          *
2688          * @param int $uid
2689          * @param int $item_id
2690          * @return boolean true if item was deleted, else false
2691          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2692          * @throws \ImagickException
2693          */
2694         private static function tagDeliver($uid, $item_id)
2695         {
2696                 $mention = false;
2697
2698                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2699                 if (!DBA::isResult($user)) {
2700                         return false;
2701                 }
2702
2703                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2704                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2705
2706                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2707                 if (!DBA::isResult($item)) {
2708                         return false;
2709                 }
2710
2711                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2712
2713                 /*
2714                  * Diaspora uses their own hardwired link URL in @-tags
2715                  * instead of the one we supply with webfinger
2716                  */
2717                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2718
2719                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2720                 if ($cnt) {
2721                         foreach ($matches as $mtch) {
2722                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2723                                         $mention = true;
2724                                         Logger::log('mention found: ' . $mtch[2]);
2725                                 }
2726                         }
2727                 }
2728
2729                 if (!$mention) {
2730                         if (($community_page || $prvgroup) &&
2731                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2732                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2733                                 DBA::delete('item', ['id' => $item_id]);
2734                                 return true;
2735                         }
2736                         return false;
2737                 }
2738
2739                 $arr = ['item' => $item, 'user' => $user];
2740
2741                 Hook::callAll('tagged', $arr);
2742
2743                 if (!$community_page && !$prvgroup) {
2744                         return false;
2745                 }
2746
2747                 /*
2748                  * tgroup delivery - setup a second delivery chain
2749                  * prevent delivery looping - only proceed
2750                  * if the message originated elsewhere and is a top-level post
2751                  */
2752                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2753                         return false;
2754                 }
2755
2756                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2757                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2758                 if (!DBA::isResult($self)) {
2759                         return false;
2760                 }
2761
2762                 $owner_id = Contact::getIdForURL($self['url']);
2763
2764                 // also reset all the privacy bits to the forum default permissions
2765
2766                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2767
2768                 $psid = PermissionSet::getIdFromACL(
2769                         $user['uid'],
2770                         $user['allow_cid'],
2771                         $user['allow_gid'],
2772                         $user['deny_cid'],
2773                         $user['deny_gid']
2774                 );
2775
2776                 $forum_mode = ($prvgroup ? 2 : 1);
2777
2778                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2779                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2780                 self::update($fields, ['id' => $item_id]);
2781
2782                 self::updateThread($item_id);
2783
2784                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2785
2786                 return false;
2787         }
2788
2789         public static function isRemoteSelf($contact, &$datarray)
2790         {
2791                 if (!$contact['remote_self']) {
2792                         return false;
2793                 }
2794
2795                 // Prevent the forwarding of posts that are forwarded
2796                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2797                         Logger::log('Already forwarded', Logger::DEBUG);
2798                         return false;
2799                 }
2800
2801                 // Prevent to forward already forwarded posts
2802                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2803                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2804                         return false;
2805                 }
2806
2807                 // Only forward posts
2808                 if ($datarray["verb"] != Activity::POST) {
2809                         Logger::log('No post', Logger::DEBUG);
2810                         return false;
2811                 }
2812
2813                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2814                         Logger::log('Not public', Logger::DEBUG);
2815                         return false;
2816                 }
2817
2818                 $datarray2 = $datarray;
2819                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2820                 if ($contact['remote_self'] == 2) {
2821                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2822                                         ['uid' => $contact['uid'], 'self' => true]);
2823                         if (DBA::isResult($self)) {
2824                                 $datarray['contact-id'] = $self["id"];
2825
2826                                 $datarray['owner-name'] = $self["name"];
2827                                 $datarray['owner-link'] = $self["url"];
2828                                 $datarray['owner-avatar'] = $self["thumb"];
2829
2830                                 $datarray['author-name']   = $datarray['owner-name'];
2831                                 $datarray['author-link']   = $datarray['owner-link'];
2832                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2833
2834                                 unset($datarray['edited']);
2835
2836                                 unset($datarray['network']);
2837                                 unset($datarray['owner-id']);
2838                                 unset($datarray['author-id']);
2839                         }
2840
2841                         if ($contact['network'] != Protocol::FEED) {
2842                                 $datarray["guid"] = System::createUUID();
2843                                 unset($datarray["plink"]);
2844                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2845                                 $datarray["parent-uri"] = $datarray["uri"];
2846                                 $datarray["thr-parent"] = $datarray["uri"];
2847                                 $datarray["extid"] = Protocol::DFRN;
2848                                 $urlpart = parse_url($datarray2['author-link']);
2849                                 $datarray["app"] = $urlpart["host"];
2850                         } else {
2851                                 $datarray['private'] = self::PUBLIC;
2852                         }
2853                 }
2854
2855                 if ($contact['network'] != Protocol::FEED) {
2856                         // Store the original post
2857                         $result = self::insert($datarray2, false, false);
2858                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2859                 } else {
2860                         $datarray["app"] = "Feed";
2861                         $result = true;
2862                 }
2863
2864                 // Trigger automatic reactions for addons
2865                 $datarray['api_source'] = true;
2866
2867                 // We have to tell the hooks who we are - this really should be improved
2868                 $_SESSION["authenticated"] = true;
2869                 $_SESSION["uid"] = $contact['uid'];
2870
2871                 return $result;
2872         }
2873
2874         /**
2875          *
2876          * @param string $s
2877          * @param int    $uid
2878          * @param array  $item
2879          * @param int    $cid
2880          * @return string
2881          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2882          * @throws \ImagickException
2883          */
2884         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2885         {
2886                 if (DI::config()->get('system', 'disable_embedded')) {
2887                         return $s;
2888                 }
2889
2890                 Logger::log('check for photos', Logger::DEBUG);
2891                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2892
2893                 $orig_body = $s;
2894                 $new_body = '';
2895
2896                 $img_start = strpos($orig_body, '[img');
2897                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2898                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2899
2900                 while (($img_st_close !== false) && ($img_len !== false)) {
2901                         $img_st_close++; // make it point to AFTER the closing bracket
2902                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2903
2904                         Logger::log('found photo ' . $image, Logger::DEBUG);
2905
2906                         if (stristr($image, $site . '/photo/')) {
2907                                 // Only embed locally hosted photos
2908                                 $replace = false;
2909                                 $i = basename($image);
2910                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2911                                 $x = strpos($i, '-');
2912
2913                                 if ($x) {
2914                                         $res = substr($i, $x + 1);
2915                                         $i = substr($i, 0, $x);
2916                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2917                                         if (DBA::isResult($photo)) {
2918                                                 /*
2919                                                  * Check to see if we should replace this photo link with an embedded image
2920                                                  * 1. No need to do so if the photo is public
2921                                                  * 2. If there's a contact-id provided, see if they're in the access list
2922                                                  *    for the photo. If so, embed it.
2923                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2924                                                  *    permissions, regardless of order but first check to see if they're an exact
2925                                                  *    match to save some processing overhead.
2926                                                  */
2927                                                 if (self::hasPermissions($photo)) {
2928                                                         if ($cid) {
2929                                                                 $recips = self::enumeratePermissions($photo);
2930                                                                 if (in_array($cid, $recips)) {
2931                                                                         $replace = true;
2932                                                                 }
2933                                                         } elseif ($item) {
2934                                                                 if (self::samePermissions($uid, $item, $photo)) {
2935                                                                         $replace = true;
2936                                                                 }
2937                                                         }
2938                                                 }
2939                                                 if ($replace) {
2940                                                         $photo_img = Photo::getImageForPhoto($photo);
2941                                                         // If a custom width and height were specified, apply before embedding
2942                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2943                                                                 Logger::log('scaling photo', Logger::DEBUG);
2944
2945                                                                 $width = intval($match[1]);
2946                                                                 $height = intval($match[2]);
2947
2948                                                                 $photo_img->scaleDown(max($width, $height));
2949                                                         }
2950
2951                                                         $data = $photo_img->asString();
2952                                                         $type = $photo_img->getType();
2953
2954                                                         Logger::log('replacing photo', Logger::DEBUG);
2955                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2956                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2957                                                 }
2958                                         }
2959                                 }
2960                         }
2961
2962                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2963                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2964                         if ($orig_body === false) {
2965                                 $orig_body = '';
2966                         }
2967
2968                         $img_start = strpos($orig_body, '[img');
2969                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2970                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2971                 }
2972
2973                 $new_body = $new_body . $orig_body;
2974
2975                 return $new_body;
2976         }
2977
2978         private static function hasPermissions($obj)
2979         {
2980                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2981                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2982         }
2983
2984         private static function samePermissions($uid, $obj1, $obj2)
2985         {
2986                 // first part is easy. Check that these are exactly the same.
2987                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2988                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2989                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2990                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2991                         return true;
2992                 }
2993
2994                 // This is harder. Parse all the permissions and compare the resulting set.
2995                 $recipients1 = self::enumeratePermissions($obj1);
2996                 $recipients2 = self::enumeratePermissions($obj2);
2997                 sort($recipients1);
2998                 sort($recipients2);
2999
3000                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
3001                 return ($recipients1 == $recipients2);
3002         }
3003
3004         /**
3005          * Returns an array of contact-ids that are allowed to see this object
3006          *
3007          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
3008          * @param bool  $check_dead Prunes unavailable contacts from the result
3009          * @return array
3010          * @throws \Exception
3011          */
3012         public static function enumeratePermissions(array $obj, bool $check_dead = false)
3013         {
3014                 $aclFormater = DI::aclFormatter();
3015
3016                 $allow_people = $aclFormater->expand($obj['allow_cid']);
3017                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
3018                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
3019                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
3020                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
3021                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
3022                 $recipients   = array_diff($recipients, $deny);
3023                 return $recipients;
3024         }
3025
3026         public static function getFeedTags($item)
3027         {
3028                 $ret = [];
3029                 $matches = false;
3030                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3031                 if ($cnt) {
3032                         for ($x = 0; $x < $cnt; $x ++) {
3033                                 if ($matches[1][$x]) {
3034                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
3035                                 }
3036                         }
3037                 }
3038                 $matches = false;
3039                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3040                 if ($cnt) {
3041                         for ($x = 0; $x < $cnt; $x ++) {
3042                                 if ($matches[1][$x]) {
3043                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3044                                 }
3045                         }
3046                 }
3047                 return $ret;
3048         }
3049
3050         public static function expire($uid, $days, $network = "", $force = false)
3051         {
3052                 if (!$uid || ($days < 1)) {
3053                         return;
3054                 }
3055
3056                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3057                         $uid, GRAVITY_PARENT];
3058
3059                 /*
3060                  * $expire_network_only = save your own wall posts
3061                  * and just expire conversations started by others
3062                  */
3063                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3064
3065                 if ($expire_network_only) {
3066                         $condition[0] .= " AND NOT `wall`";
3067                 }
3068
3069                 if ($network != "") {
3070                         $condition[0] .= " AND `network` = ?";
3071                         $condition[] = $network;
3072                 }
3073
3074                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3075                 $condition[] = $days;
3076
3077                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3078
3079                 if (!DBA::isResult($items)) {
3080                         return;
3081                 }
3082
3083                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3084
3085                 // Forcing expiring of items - but not notes and marked items
3086                 if ($force) {
3087                         $expire_items = true;
3088                 }
3089
3090                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3091                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3092                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3093
3094                 $expired = 0;
3095
3096                 while ($item = Item::fetch($items)) {
3097                         // don't expire filed items
3098
3099                         if (strpos($item['file'], '[') !== false) {
3100                                 continue;
3101                         }
3102
3103                         // Only expire posts, not photos and photo comments
3104
3105                         if (!$expire_photos && strlen($item['resource-id'])) {
3106                                 continue;
3107                         } elseif (!$expire_starred && intval($item['starred'])) {
3108                                 continue;
3109                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3110                                 continue;
3111                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3112                                 continue;
3113                         }
3114
3115                         self::markForDeletionById($item['id'], PRIORITY_LOW);
3116
3117                         ++$expired;
3118                 }
3119                 DBA::close($items);
3120                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3121         }
3122
3123         public static function firstPostDate($uid, $wall = false)
3124         {
3125                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3126                 $params = ['order' => ['received' => false]];
3127                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3128                 if (DBA::isResult($thread)) {
3129                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3130                 }
3131                 return false;
3132         }
3133
3134         /**
3135          * add/remove activity to an item
3136          *
3137          * Toggle activities as like,dislike,attend of an item
3138          *
3139          * @param string $item_id
3140          * @param string $verb
3141          *            Activity verb. One of
3142          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3143          *            attendno, unattendno, attendmaybe, unattendmaybe
3144          * @return bool
3145          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3146          * @throws \ImagickException
3147          * @hook  'post_local_end'
3148          *            array $arr
3149          *            'post_id' => ID of posted item
3150          */
3151         public static function performActivity($item_id, $verb)
3152         {
3153                 if (!Session::isAuthenticated()) {
3154                         return false;
3155                 }
3156
3157                 switch ($verb) {
3158                         case 'like':
3159                         case 'unlike':
3160                                 $activity = Activity::LIKE;
3161                                 break;
3162                         case 'dislike':
3163                         case 'undislike':
3164                                 $activity = Activity::DISLIKE;
3165                                 break;
3166                         case 'attendyes':
3167                         case 'unattendyes':
3168                                 $activity = Activity::ATTEND;
3169                                 break;
3170                         case 'attendno':
3171                         case 'unattendno':
3172                                 $activity = Activity::ATTENDNO;
3173                                 break;
3174                         case 'attendmaybe':
3175                         case 'unattendmaybe':
3176                                 $activity = Activity::ATTENDMAYBE;
3177                                 break;
3178                         case 'follow':
3179                         case 'unfollow':
3180                                 $activity = Activity::FOLLOW;
3181                                 break;
3182                         default:
3183                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3184                                 return false;
3185                 }
3186
3187                 // Enable activity toggling instead of on/off
3188                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3189
3190                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3191
3192                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3193                 if (!DBA::isResult($item)) {
3194                         Logger::log('like: unknown item ' . $item_id);
3195                         return false;
3196                 }
3197
3198                 $item_uri = $item['uri'];
3199
3200                 $uid = $item['uid'];
3201                 if (($uid == 0) && local_user()) {
3202                         $uid = local_user();
3203                 }
3204
3205                 if (!Security::canWriteToUserWall($uid)) {
3206                         Logger::log('like: unable to write on wall ' . $uid);
3207                         return false;
3208                 }
3209
3210                 // Retrieves the local post owner
3211                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3212                 if (!DBA::isResult($owner_self_contact)) {
3213                         Logger::log('like: unknown owner ' . $uid);
3214                         return false;
3215                 }
3216
3217                 // Retrieve the current logged in user's public contact
3218                 $author_id = public_contact();
3219
3220                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3221                 if (!DBA::isResult($author_contact)) {
3222                         Logger::log('like: unknown author ' . $author_id);
3223                         return false;
3224                 }
3225
3226                 // Contact-id is the uid-dependant author contact
3227                 if (local_user() == $uid) {
3228                         $item_contact_id = $owner_self_contact['id'];
3229                 } else {
3230                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3231                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3232                         if (!DBA::isResult($item_contact)) {
3233                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3234                                 return false;
3235                         }
3236                 }
3237
3238                 // Look for an existing verb row
3239                 // event participation are essentially radio toggles. If you make a subsequent choice,
3240                 // we need to eradicate your first choice.
3241                 if ($event_verb_flag) {
3242                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3243
3244                         // Translate to the index based activity index
3245                         $activities = [];
3246                         foreach ($verbs as $verb) {
3247                                 $activities[] = self::activityToIndex($verb);
3248                         }
3249                 } else {
3250                         $activities = self::activityToIndex($activity);
3251                 }
3252
3253                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3254                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3255
3256                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3257
3258                 // If it exists, mark it as deleted
3259                 if (DBA::isResult($like_item)) {
3260                         self::markForDeletionById($like_item['id']);
3261
3262                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3263                                 return true;
3264                         }
3265                 }
3266
3267                 // Verb is "un-something", just trying to delete existing entries
3268                 if (strpos($verb, 'un') === 0) {
3269                         return true;
3270                 }
3271
3272                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3273
3274                 $new_item = [
3275                         'guid'          => System::createUUID(),
3276                         'uri'           => self::newURI($item['uid']),
3277                         'uid'           => $item['uid'],
3278                         'contact-id'    => $item_contact_id,
3279                         'wall'          => $item['wall'],
3280                         'origin'        => 1,
3281                         'network'       => Protocol::DFRN,
3282                         'gravity'       => GRAVITY_ACTIVITY,
3283                         'parent'        => $item['id'],
3284                         'parent-uri'    => $item['uri'],
3285                         'thr-parent'    => $item['uri'],
3286                         'owner-id'      => $author_id,
3287                         'author-id'     => $author_id,
3288                         'body'          => $activity,
3289                         'verb'          => $activity,
3290                         'object-type'   => $objtype,
3291                         'allow_cid'     => $item['allow_cid'],
3292                         'allow_gid'     => $item['allow_gid'],
3293                         'deny_cid'      => $item['deny_cid'],
3294                         'deny_gid'      => $item['deny_gid'],
3295                         'visible'       => 1,
3296                         'unseen'        => 1,
3297                 ];
3298
3299                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3300                 if (!empty($signed)) {
3301                         $new_item['diaspora_signed_text'] = json_encode($signed);
3302                 }
3303
3304                 $new_item_id = self::insert($new_item);
3305
3306                 // If the parent item isn't visible then set it to visible
3307                 if (!$item['visible']) {
3308                         self::update(['visible' => true], ['id' => $item['id']]);
3309                 }
3310
3311                 $new_item['id'] = $new_item_id;
3312
3313                 Hook::callAll('post_local_end', $new_item);
3314
3315                 return true;
3316         }
3317
3318         private static function addThread($itemid, $onlyshadow = false)
3319         {
3320                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3321                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3322                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3323                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3324                 $item = self::selectFirst($fields, $condition);
3325
3326                 if (!DBA::isResult($item)) {
3327                         return;
3328                 }
3329
3330                 $item['iid'] = $itemid;
3331
3332                 if (!$onlyshadow) {
3333                         $result = DBA::insert('thread', $item);
3334
3335                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3336                 }
3337         }
3338
3339         private static function updateThread($itemid, $setmention = false)
3340         {
3341                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3342                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3343                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3344                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3345
3346                 $item = self::selectFirst($fields, $condition);
3347                 if (!DBA::isResult($item)) {
3348                         return;
3349                 }
3350
3351                 if ($setmention) {
3352                         $item["mention"] = 1;
3353                 }
3354
3355                 $fields = [];
3356
3357                 foreach ($item as $field => $data) {
3358                         if (!in_array($field, ["guid"])) {
3359                                 $fields[$field] = $data;
3360                         }
3361                 }
3362
3363                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3364
3365                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3366         }
3367
3368         private static function deleteThread($itemid, $itemuri = "")
3369         {
3370                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3371                 if (!DBA::isResult($item)) {
3372                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3373                         return;
3374                 }
3375
3376                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3377
3378                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3379
3380                 if ($itemuri != "") {
3381                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3382                         if (!self::exists($condition)) {
3383                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3384                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3385                         }
3386                 }
3387         }
3388
3389         public static function getPermissionsSQLByUserId($owner_id)
3390         {
3391                 $local_user = local_user();
3392                 $remote_user = Session::getRemoteContactID($owner_id);
3393
3394                 /*
3395                  * Construct permissions
3396                  *
3397                  * default permissions - anonymous user
3398                  */
3399                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3400
3401                 // Profile owner - everything is visible
3402                 if ($local_user && ($local_user == $owner_id)) {
3403                         $sql = '';
3404                 } elseif ($remote_user) {
3405                         /*
3406                          * Authenticated visitor. Unless pre-verified,
3407                          * check that the contact belongs to this $owner_id
3408                          * and load the groups the visitor belongs to.
3409                          * If pre-verified, the caller is expected to have already
3410                          * done this and passed the groups into this function.
3411                          */
3412                         $set = PermissionSet::get($owner_id, $remote_user);
3413
3414                         if (!empty($set)) {
3415                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3416                         } else {
3417                                 $sql_set = '';
3418                         }
3419
3420                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3421                 }
3422
3423                 return $sql;
3424         }
3425
3426         /**
3427          * get translated item type
3428          *
3429          * @param $item
3430          * @return string
3431          */
3432         public static function postType($item)
3433         {
3434                 if (!empty($item['event-id'])) {
3435                         return DI::l10n()->t('event');
3436                 } elseif (!empty($item['resource-id'])) {
3437                         return DI::l10n()->t('photo');
3438                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3439                         return DI::l10n()->t('activity');
3440                 } elseif ($item['id'] != $item['parent']) {
3441                         return DI::l10n()->t('comment');
3442                 }
3443
3444                 return DI::l10n()->t('post');
3445         }
3446
3447         /**
3448          * Sets the "rendered-html" field of the provided item
3449          *
3450          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3451          *
3452          * @param array $item
3453          * @param bool  $update
3454          *
3455          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3456          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3457          */
3458         public static function putInCache(&$item, $update = false)
3459         {
3460                 $body = $item["body"];
3461
3462                 $rendered_hash = $item['rendered-hash'] ?? '';
3463                 $rendered_html = $item['rendered-html'] ?? '';
3464
3465                 if ($rendered_hash == ''
3466                         || $rendered_html == ""
3467                         || $rendered_hash != hash("md5", $item["body"])
3468                         || DI::config()->get("system", "ignore_cache")
3469                 ) {
3470                         self::addRedirToImageTags($item);
3471
3472                         $item["rendered-html"] = BBCode::convert($item["body"]);
3473                         $item["rendered-hash"] = hash("md5", $item["body"]);
3474
3475                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3476                         Hook::callAll('put_item_in_cache', $hook_data);
3477                         $item['rendered-html'] = $hook_data['rendered-html'];
3478                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3479                         unset($hook_data);
3480
3481                         // Force an update if the generated values differ from the existing ones
3482                         if ($rendered_hash != $item["rendered-hash"]) {
3483                                 $update = true;
3484                         }
3485
3486                         // Only compare the HTML when we forcefully ignore the cache
3487                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3488                                 $update = true;
3489                         }
3490
3491                         if ($update && !empty($item["id"])) {
3492                                 self::update(
3493                                         [
3494                                                 'rendered-html' => $item["rendered-html"],
3495                                                 'rendered-hash' => $item["rendered-hash"]
3496                                         ],
3497                                         ['id' => $item["id"]]
3498                                 );
3499                         }
3500                 }
3501
3502                 $item["body"] = $body;
3503         }
3504
3505         /**
3506          * Find any non-embedded images in private items and add redir links to them
3507          *
3508          * @param array &$item The field array of an item row
3509          */
3510         private static function addRedirToImageTags(array &$item)
3511         {
3512                 $app = DI::app();
3513
3514                 $matches = [];
3515                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3516                 if ($cnt) {
3517                         foreach ($matches as $mtch) {
3518                                 if (strpos($mtch[1], '/redir') !== false) {
3519                                         continue;
3520                                 }
3521
3522                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3523                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3524                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3525                                 }
3526                         }
3527                 }
3528         }
3529
3530         /**
3531          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3532          * If attach is true, also add icons for item attachments.
3533          *
3534          * @param array   $item
3535          * @param boolean $attach
3536          * @param boolean $is_preview
3537          * @return string item body html
3538          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3539          * @throws \ImagickException
3540          * @hook  prepare_body_init item array before any work
3541          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3542          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3543          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3544          */
3545         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3546         {
3547                 $a = DI::app();
3548                 Hook::callAll('prepare_body_init', $item);
3549
3550                 // In order to provide theme developers more possibilities, event items
3551                 // are treated differently.
3552                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3553                         $ev = Event::getItemHTML($item);
3554                         return $ev;
3555                 }
3556
3557                 $tags = Term::populateTagsFromItem($item);
3558
3559                 $item['tags'] = $tags['tags'];
3560                 $item['hashtags'] = $tags['hashtags'];
3561                 $item['mentions'] = $tags['mentions'];
3562
3563                 // Compile eventual content filter reasons
3564                 $filter_reasons = [];
3565                 if (!$is_preview && public_contact() != $item['author-id']) {
3566                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3567                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3568                         }
3569
3570                         $hook_data = [
3571                                 'item' => $item,
3572                                 'filter_reasons' => $filter_reasons
3573                         ];
3574                         Hook::callAll('prepare_body_content_filter', $hook_data);
3575                         $filter_reasons = $hook_data['filter_reasons'];
3576                         unset($hook_data);
3577                 }
3578
3579                 // Update the cached values if there is no "zrl=..." on the links.
3580                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3581
3582                 // Or update it if the current viewer is the intented viewer.
3583                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3584                         $update = true;
3585                 }
3586
3587                 self::putInCache($item, $update);
3588                 $s = $item["rendered-html"];
3589
3590                 $hook_data = [
3591                         'item' => $item,
3592                         'html' => $s,
3593                         'preview' => $is_preview,
3594                         'filter_reasons' => $filter_reasons
3595                 ];
3596                 Hook::callAll('prepare_body', $hook_data);
3597                 $s = $hook_data['html'];
3598                 unset($hook_data);
3599
3600                 if (!$attach) {
3601                         // Replace the blockquotes with quotes that are used in mails.
3602                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3603                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3604                         return $s;
3605                 }
3606
3607                 $as = '';
3608                 $vhead = false;
3609                 $matches = [];
3610                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3611                 foreach ($matches as $mtch) {
3612                         $mime = $mtch[3];
3613
3614                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3615
3616                         if (strpos($mime, 'video') !== false) {
3617                                 if (!$vhead) {
3618                                         $vhead = true;
3619                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3620                                 }
3621
3622                                 $url_parts = explode('/', $the_url);
3623                                 $id = end($url_parts);
3624                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3625                                         '$video' => [
3626                                                 'id'     => $id,
3627                                                 'title'  => DI::l10n()->t('View Video'),
3628                                                 'src'    => $the_url,
3629                                                 'mime'   => $mime,
3630                                         ],
3631                                 ]);
3632                         }
3633
3634                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3635                         if ($filetype) {
3636                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3637                                 $filesubtype = str_replace('.', '-', $filesubtype);
3638                         } else {
3639                                 $filetype = 'unkn';
3640                                 $filesubtype = 'unkn';
3641                         }
3642
3643                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3644                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3645
3646                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3647                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3648                 }
3649
3650                 if ($as != '') {
3651                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3652                 }
3653
3654                 // Map.
3655                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3656                         $x = Map::byCoordinates(trim($item['coord']));
3657                         if ($x) {
3658                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3659                         }
3660                 }
3661
3662                 // Replace friendica image url size with theme preference.
3663                 if (!empty($a->theme_info['item_image_size'])) {
3664                         $ps = $a->theme_info['item_image_size'];
3665                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3666                 }
3667
3668                 $s = HTML::applyContentFilter($s, $filter_reasons);
3669
3670                 $hook_data = ['item' => $item, 'html' => $s];
3671                 Hook::callAll('prepare_body_final', $hook_data);
3672
3673                 return $hook_data['html'];
3674         }
3675
3676         /**
3677          * get private link for item
3678          *
3679          * @param array $item
3680          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3681          * @throws \Exception
3682          */
3683         public static function getPlink($item)
3684         {
3685                 $a = DI::app();
3686
3687                 if ($a->user['nickname'] != "") {
3688                         $ret = [
3689                                 'href' => "display/" . $item['guid'],
3690                                 'orig' => "display/" . $item['guid'],
3691                                 'title' => DI::l10n()->t('View on separate page'),
3692                                 'orig_title' => DI::l10n()->t('view on separate page'),
3693                         ];
3694
3695                         if (!empty($item['plink'])) {
3696                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3697                                 $ret["title"] = DI::l10n()->t('link to source');
3698                         }
3699
3700                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3701                         $ret = [
3702                                 'href' => $item['plink'],
3703                                 'orig' => $item['plink'],
3704                                 'title' => DI::l10n()->t('link to source'),
3705                         ];
3706                 } else {
3707                         $ret = [];
3708                 }
3709
3710                 return $ret;
3711         }
3712
3713         /**
3714          * Is the given item array a post that is sent as starting post to a forum?
3715          *
3716          * @param array $item
3717          * @param array $owner
3718          *
3719          * @return boolean "true" when it is a forum post
3720          */
3721         public static function isForumPost(array $item, array $owner = [])
3722         {
3723                 if (empty($owner)) {
3724                         $owner = User::getOwnerDataById($item['uid']);
3725                         if (empty($owner)) {
3726                                 return false;
3727                         }
3728                 }
3729
3730                 if (($item['author-id'] == $item['owner-id']) ||
3731                         ($owner['id'] == $item['contact-id']) ||
3732                         ($item['uri'] != $item['parent-uri']) ||
3733                         $item['origin']) {
3734                         return false;
3735                 }
3736
3737                 return Contact::isForum($item['contact-id']);
3738         }
3739
3740         /**
3741          * Search item id for given URI or plink
3742          *
3743          * @param string $uri
3744          * @param integer $uid
3745          *
3746          * @return integer item id
3747          */
3748         public static function searchByLink($uri, $uid = 0)
3749         {
3750                 $ssl_uri = str_replace('http://', 'https://', $uri);
3751                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3752
3753                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3754                 if (DBA::isResult($item)) {
3755                         return $item['id'];
3756                 }
3757
3758                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3759                 if (!DBA::isResult($itemcontent)) {
3760                         return 0;
3761                 }
3762
3763                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3764                 if (!DBA::isResult($itemuri)) {
3765                         return 0;
3766                 }
3767
3768                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3769                 if (DBA::isResult($item)) {
3770                         return $item['id'];
3771                 }
3772
3773                 return 0;
3774         }
3775
3776         /**
3777          * Return the URI for a link to the post
3778          *
3779          * @param string $uri URI or link to post
3780          *
3781          * @return string URI
3782          */
3783         public static function getURIByLink(string $uri)
3784         {
3785                 $ssl_uri = str_replace('http://', 'https://', $uri);
3786                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3787
3788                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3789                 if (DBA::isResult($item)) {
3790                         return $item['uri'];
3791                 }
3792
3793                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3794                 if (!DBA::isResult($itemcontent)) {
3795                         return '';
3796                 }
3797
3798                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3799                 if (DBA::isResult($itemuri)) {
3800                         return $itemuri['uri'];
3801                 }
3802
3803                 return '';
3804         }
3805
3806         /**
3807          * Fetches item for given URI or plink
3808          *
3809          * @param string $uri
3810          * @param integer $uid
3811          *
3812          * @return integer item id
3813          */
3814         public static function fetchByLink($uri, $uid = 0)
3815         {
3816                 $item_id = self::searchByLink($uri, $uid);
3817                 if (!empty($item_id)) {
3818                         return $item_id;
3819                 }
3820
3821                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3822                         $item_id = self::searchByLink($fetched_uri, $uid);
3823                 } else {
3824                         $item_id = Diaspora::fetchByURL($uri);
3825                 }
3826
3827                 if (!empty($item_id)) {
3828                         return $item_id;
3829                 }
3830
3831                 return 0;
3832         }
3833
3834         /**
3835          * Return share data from an item array (if the item is shared item)
3836          * We are providing the complete Item array, because at some time in the future
3837          * we hopefully will define these values not in the body anymore but in some item fields.
3838          * This function is meant to replace all similar functions in the system.
3839          *
3840          * @param array $item
3841          *
3842          * @return array with share information
3843          */
3844         public static function getShareArray($item)
3845         {
3846                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3847                         return [];
3848                 }
3849
3850                 $attribute_string = $matches[2];
3851                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3852                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3853                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3854                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3855                         }
3856                 }
3857                 return $attributes;
3858         }
3859
3860         /**
3861          * Fetch item information for shared items from the original items and adds it.
3862          *
3863          * @param array $item
3864          *
3865          * @return array item array with data from the original item
3866          */
3867         public static function addShareDataFromOriginal($item)
3868         {
3869                 $shared = self::getShareArray($item);
3870                 if (empty($shared)) {
3871                         return $item;
3872                 }
3873
3874                 // Real reshares always have got a GUID.
3875                 if (empty($shared['guid'])) {
3876                         return $item;
3877                 }
3878
3879                 $uid = $item['uid'] ?? 0;
3880
3881                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3882                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3883                 if (!DBA::isResult($shared_item)) {
3884                         if (empty($shared['link'])) {
3885                                 return $item;
3886                         }
3887
3888                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3889                         $id = self::fetchByLink($shared['link'], $uid);
3890                         if (empty($id)) {
3891                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3892                                 return $item;
3893                         }
3894
3895                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3896                         if (!DBA::isResult($shared_item)) {
3897                                 return $item;
3898                         }
3899                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3900                 } else {
3901                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3902                 }
3903
3904                 if (!empty($shared_item['title'])) {
3905                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3906                         unset($shared_item['title']);
3907                 } else {
3908                         $body = $shared_item['body'];
3909                 }
3910
3911                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3912                 unset($shared_item['body']);
3913
3914                 return array_merge($item, $shared_item);
3915         }
3916 }