src/Model/Item.php

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