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\Database;
  35 use Friendica\Database\DBA;
  36 use Friendica\Database\DBStructure;
  37 use Friendica\DI;
  38 use Friendica\Model\Post;
  39 use Friendica\Protocol\Activity;
  40 use Friendica\Protocol\ActivityPub;
  41 use Friendica\Protocol\Diaspora;
  42 use Friendica\Util\DateTimeFormat;
  43 use Friendica\Util\Map;
  44 use Friendica\Util\Network;
  45 use Friendica\Util\Strings;
  46 use Friendica\Worker\Delivery;
  47 use LanguageDetection\Language;
  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_FETCHED = 75;
  72         const PT_PERSONAL_NOTE = 128;
  73
  74         // Field list that is used to display the items
  75         const DISPLAY_FIELDLIST = [
  76                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  77                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri',
  78                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  79                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'language',
  80                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  81                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  82                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  83                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  84                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type',
  85                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  86                 'writable', 'self', 'cid', 'alias',
  87                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  88                 'event-summary', 'event-desc', 'event-location', 'event-type',
  89                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  90                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  91         ];
  92
  93         // Field list that is used to deliver items via the protocols
  94         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  95                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  96                         'private', 'title', 'body', 'location', 'coord', 'app',
  97                         'deleted', 'extid', 'post-type', 'gravity',
  98                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  99                         'author-id', 'author-link', 'owner-link', 'contact-uid',
 100                         'signed_text', 'network'];
 101
 102         // Field list for "item-content" table that is mixed with the item table
 103         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
 104                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
 105                         'object-type', 'object', 'target-type', 'target', 'plink'];
 106
 107         // Field list for "item-content" table that is not present in the "item" table
 108         const CONTENT_FIELDLIST = ['language', 'raw-body'];
 109
 110         // All fields in the item table
 111         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 112                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 113                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'psid',
 114                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 115                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 116                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 117                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 118                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 119                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 120                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 121                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 122                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 123
 124         // List of all verbs that don't need additional content data.
 125         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 126         const ACTIVITIES = [
 127                 Activity::LIKE, Activity::DISLIKE,
 128                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 129                 Activity::FOLLOW,
 130                 Activity::ANNOUNCE];
 131
 132         const PUBLIC = 0;
 133         const PRIVATE = 1;
 134         const UNLISTED = 2;
 135
 136         const TABLES = ['item', 'user-item', 'item-content', 'post-delivery-data', 'diaspora-interaction'];
 137
 138         private static function getItemFields()
 139         {
 140                 $definition = DBStructure::definition('', false);
 141
 142                 $postfields = [];
 143                 foreach (self::TABLES as $table) {
 144                         $postfields[$table] = array_keys($definition[$table]['fields']);
 145                 }
 146
 147                 return $postfields;
 148         }
 149
 150         /**
 151          * Set the pinned state of an item
 152          *
 153          * @param integer $iid    Item ID
 154          * @param integer $uid    User ID
 155          * @param boolean $pinned Pinned state
 156          */
 157         public static function setPinned(int $iid, int $uid, bool $pinned)
 158         {
 159                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 160         }
 161
 162         /**
 163          * Get the pinned state
 164          *
 165          * @param integer $iid Item ID
 166          * @param integer $uid User ID
 167          *
 168          * @return boolean pinned state
 169          */
 170         public static function getPinned(int $iid, int $uid)
 171         {
 172                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 173                 if (!DBA::isResult($useritem)) {
 174                         return false;
 175                 }
 176                 return (bool)$useritem['pinned'];
 177         }
 178
 179         /**
 180          * Update existing item entries
 181          *
 182          * @param array $fields    The fields that are to be changed
 183          * @param array $condition The condition for finding the item entries
 184          *
 185          * In the future we may have to change permissions as well.
 186          * Then we had to add the user id as third parameter.
 187          *
 188          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 189          *
 190          * @return integer|boolean number of affected rows - or "false" if there was an error
 191          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 192          */
 193         public static function update(array $fields, array $condition)
 194         {
 195                 if (empty($condition) || empty($fields)) {
 196                         return false;
 197                 }
 198
 199                 $data_fields = $fields;
 200
 201                 // To ensure the data integrity we do it in an transaction
 202                 DBA::transaction();
 203
 204                 // We cannot simply expand the condition to check for origin entries
 205                 // The condition needn't to be a simple array but could be a complex condition.
 206                 // And we have to execute this query before the update to ensure to fetch the same data.
 207                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'uid'], $condition);
 208
 209                 $content_fields = [];
 210                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 211                         if (isset($fields[$field])) {
 212                                 $content_fields[$field] = $fields[$field];
 213                                 unset($fields[$field]);
 214                         }
 215                 }
 216
 217                 $delivery_data = Post\DeliveryData::extractFields($fields);
 218
 219                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 220                 foreach ($clear_fields as $field) {
 221                         unset($fields[$field]);
 222                 }
 223
 224                 if (array_key_exists('file', $fields)) {
 225                         $files = $fields['file'];
 226                         unset($fields['file']);
 227                 } else {
 228                         $files = null;
 229                 }
 230
 231                 if (!empty($content_fields['verb'])) {
 232                         $fields['vid'] = Verb::getID($content_fields['verb']);
 233                 }
 234
 235                 if (!empty($fields)) {
 236                         $success = DBA::update('item', $fields, $condition);
 237
 238                         if (!$success) {
 239                                 DBA::close($items);
 240                                 DBA::rollback();
 241                                 return false;
 242                         }
 243                 }
 244
 245                 // When there is no content for the "old" item table, this will count the fetched items
 246                 $rows = DBA::affectedRows();
 247
 248                 $notify_items = [];
 249
 250                 while ($item = DBA::fetch($items)) {
 251                         Post\User::update($item['uri-id'], $item['uid'], $data_fields);
 252
 253                         if (empty($content_fields['verb']) || !in_array($content_fields['verb'], self::ACTIVITIES)) {
 254                                 if (!empty($content_fields['body'])) {
 255                                         $content_fields['raw-body'] = trim($content_fields['raw-body'] ?? $content_fields['body']);
 256
 257                                         // Remove all media attachments from the body and store them in the post-media table
 258                                         $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 259                                         $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 260                                 }
 261
 262                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 263                         }
 264
 265                         if (!is_null($files)) {
 266                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $files);
 267                         }
 268
 269                         if (!empty($fields['attach'])) {
 270                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 271                         }
 272
 273                         Post\DeliveryData::update($item['uri-id'], $delivery_data);
 274
 275                         self::updateThread($item['id']);
 276
 277                         // We only need to notfiy others when it is an original entry from us.
 278                         // Only call the notifier when the item has some content relevant change.
 279                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 280                                 $notify_items[] = $item['id'];
 281                         }
 282                 }
 283
 284                 DBA::close($items);
 285                 DBA::commit();
 286
 287                 foreach ($notify_items as $notify_item) {
 288                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
 289                 }
 290
 291                 return $rows;
 292         }
 293
 294         /**
 295          * Delete an item and notify others about it - if it was ours
 296          *
 297          * @param array   $condition The condition for finding the item entries
 298          * @param integer $priority  Priority for the notification
 299          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 300          */
 301         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 302         {
 303                 $items = Post::select(['id'], $condition);
 304                 while ($item = Post::fetch($items)) {
 305                         self::markForDeletionById($item['id'], $priority);
 306                 }
 307                 DBA::close($items);
 308         }
 309
 310         /**
 311          * Delete an item for an user and notify others about it - if it was ours
 312          *
 313          * @param array   $condition The condition for finding the item entries
 314          * @param integer $uid       User who wants to delete this item
 315          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 316          */
 317         public static function deleteForUser($condition, $uid)
 318         {
 319                 if ($uid == 0) {
 320                         return;
 321                 }
 322
 323                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 324                 while ($item = Post::fetch($items)) {
 325                         if (in_array($item['uid'], [$uid, 0])) {
 326                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 327                         }
 328
 329                         // "Deleting" global items just means hiding them
 330                         if ($item['uid'] == 0) {
 331                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 332                         } elseif ($item['uid'] == $uid) {
 333                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 334                         } else {
 335                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
 336                         }
 337                 }
 338                 DBA::close($items);
 339         }
 340
 341         /**
 342          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 343          *
 344          * @param integer $item_id
 345          * @param integer $priority Priority for the notification
 346          *
 347          * @return boolean success
 348          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 349          */
 350         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 351         {
 352                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 353                 // locate item to be deleted
 354                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 355                         'deleted', 'resource-id', 'event-id',
 356                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 357                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 358                 if (!DBA::isResult($item)) {
 359                         Logger::info('Item not found.', ['id' => $item_id]);
 360                         return false;
 361                 }
 362
 363                 if ($item['deleted']) {
 364                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 365                         return false;
 366                 }
 367
 368                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 369                 if (!DBA::isResult($parent)) {
 370                         $parent = ['origin' => false];
 371                 }
 372
 373                 // clean up categories and tags so they don't end up as orphans
 374                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 375
 376                 /*
 377                  * If item is a link to a photo resource, nuke all the associated photos
 378                  * (visitors will not have photo resources)
 379                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 380                  * generate a resource-id and therefore aren't intimately linked to the item.
 381                  */
 382                 /// @TODO: this should first check if photo is used elsewhere
 383                 if (strlen($item['resource-id'])) {
 384                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 385                 }
 386
 387                 // If item is a link to an event, delete the event.
 388                 if (intval($item['event-id'])) {
 389                         Event::delete($item['event-id']);
 390                 }
 391
 392                 // If item has attachments, drop them
 393                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 394                 foreach($attachments as $attachment) {
 395                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 396                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 397                         }
 398                 }
 399
 400                 // Set the item to "deleted"
 401                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 402                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 403
 404                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 405                 self::deleteThread($item['id'], $item['parent-uri-id']);
 406
 407                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 408                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 409                 }
 410
 411                 Post\DeliveryData::delete($item['uri-id']);
 412
 413                 // When the permission set will be used in photo and events as well,
 414                 // this query here needs to be extended.
 415                 // @todo Currently deactivated. We need the permission set in the deletion process.
 416                 // This is a reminder to add the removal somewhere else.
 417                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
 418                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
 419                 //}
 420
 421                 // If it's the parent of a comment thread, kill all the kids
 422                 if ($item['gravity'] == GRAVITY_PARENT) {
 423                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 424                 }
 425
 426                 // Is it our comment and/or our thread?
 427                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 428                         // When we delete the original post we will delete all existing copies on the server as well
 429                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 430
 431                         // send the notification upstream/downstream
 432                         if ($priority) {
 433                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
 434                         }
 435                 } elseif ($item['uid'] != 0) {
 436                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 437
 438                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 439                         $global_item = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false]);
 440                         if (DBA::isResult($global_item)) {
 441                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 442                         }
 443                 }
 444
 445                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 446
 447                 return true;
 448         }
 449
 450         private static function guid($item, $notify)
 451         {
 452                 if (!empty($item['guid'])) {
 453                         return Strings::escapeTags(trim($item['guid']));
 454                 }
 455
 456                 if ($notify) {
 457                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 458                         // We add the hash of our own host because our host is the original creator of the post.
 459                         $prefix_host = DI::baseUrl()->getHostname();
 460                 } else {
 461                         $prefix_host = '';
 462
 463                         // We are only storing the post so we create a GUID from the original hostname.
 464                         if (!empty($item['author-link'])) {
 465                                 $parsed = parse_url($item['author-link']);
 466                                 if (!empty($parsed['host'])) {
 467                                         $prefix_host = $parsed['host'];
 468                                 }
 469                         }
 470
 471                         if (empty($prefix_host) && !empty($item['plink'])) {
 472                                 $parsed = parse_url($item['plink']);
 473                                 if (!empty($parsed['host'])) {
 474                                         $prefix_host = $parsed['host'];
 475                                 }
 476                         }
 477
 478                         if (empty($prefix_host) && !empty($item['uri'])) {
 479                                 $parsed = parse_url($item['uri']);
 480                                 if (!empty($parsed['host'])) {
 481                                         $prefix_host = $parsed['host'];
 482                                 }
 483                         }
 484
 485                         // Is it in the format data@host.tld? - Used for mail contacts
 486                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 487                                 $mailparts = explode('@', $item['author-link']);
 488                                 $prefix_host = array_pop($mailparts);
 489                         }
 490                 }
 491
 492                 if (!empty($item['plink'])) {
 493                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 494                 } elseif (!empty($item['uri'])) {
 495                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 496                 } else {
 497                         $guid = System::createUUID(hash('crc32', $prefix_host));
 498                 }
 499
 500                 return $guid;
 501         }
 502
 503         private static function contactId($item)
 504         {
 505                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 506                         return $item['contact-id'];
 507                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 508                         return $item['contact-id'];
 509                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 510                         return $item['author-id'];
 511                 } elseif (!empty($item['contact-id'])) {
 512                         return $item['contact-id'];
 513                 } else {
 514                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 515                         if (!empty($contact_id)) {
 516                                 return $contact_id;
 517                         }
 518                 }
 519                 return $item['author-id'];
 520         }
 521
 522         /**
 523          * Write an item array into a spool file to be inserted later.
 524          * This command is called whenever there are issues storing an item.
 525          *
 526          * @param array $item The item fields that are to be inserted
 527          * @throws \Exception
 528          */
 529         private static function spool($orig_item)
 530         {
 531                 // Now we store the data in the spool directory
 532                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 533                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 534
 535                 $spoolpath = get_spoolpath();
 536                 if ($spoolpath != "") {
 537                         $spool = $spoolpath . '/' . $file;
 538
 539                         file_put_contents($spool, json_encode($orig_item));
 540                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 541                 }
 542         }
 543
 544         /**
 545          * Check if the item array is a duplicate
 546          *
 547          * @param array $item
 548          * @return boolean is it a duplicate?
 549          */
 550         private static function isDuplicate(array $item)
 551         {
 552                 // Checking if there is already an item with the same guid
 553                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 554                 if (Post::exists($condition)) {
 555                         Logger::notice('Found already existing item', [
 556                                 'guid' => $item['guid'],
 557                                 'uid' => $item['uid'],
 558                                 'network' => $item['network']
 559                         ]);
 560                         return true;
 561                 }
 562
 563                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 564                         'network' => [$item['network'], Protocol::DFRN]];
 565                 if (Post::exists($condition)) {
 566                         Logger::notice('duplicated item with the same uri found.', $item);
 567                         return true;
 568                 }
 569
 570                 // On Friendica and Diaspora the GUID is unique
 571                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 572                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 573                         if (Post::exists($condition)) {
 574                                 Logger::notice('duplicated item with the same guid found.', $item);
 575                                 return true;
 576                         }
 577                 } elseif ($item['network'] == Protocol::OSTATUS) {
 578                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 579                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 580                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 581                         if (Post::exists($condition)) {
 582                                 Logger::notice('duplicated item with the same body found.', $item);
 583                                 return true;
 584                         }
 585                 }
 586
 587                 /*
 588                  * Check for already added items.
 589                  * There is a timing issue here that sometimes creates double postings.
 590                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 591                  */
 592                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 593                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 594                         return true;
 595                 }
 596
 597                 return false;
 598         }
 599
 600         /**
 601          * Check if the item array is valid
 602          *
 603          * @param array $item
 604          * @return boolean item is valid
 605          */
 606         public static function isValid(array $item)
 607         {
 608                 // When there is no content then we don't post it
 609                 if ($item['body'] . $item['title'] == '') {
 610                         Logger::notice('No body, no title.');
 611                         return false;
 612                 }
 613
 614                 if (!empty($item['uid'])) {
 615                         $owner = User::getOwnerDataById($item['uid'], false);
 616                         if (!$owner) {
 617                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 618                                 return false;
 619                         }
 620
 621                         if ($owner['account_expired'] || $owner['account_removed']) {
 622                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 623                                 return false;
 624                         }
 625                 }
 626
 627                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 628                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 629                         return false;
 630                 }
 631
 632                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 633                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 634                         return false;
 635                 }
 636
 637                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 638                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 639                         return false;
 640                 }
 641
 642                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 643                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 644                         return false;
 645                 }
 646
 647                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 648                         return false;
 649                 }
 650
 651                 if ($item['verb'] == Activity::FOLLOW) {
 652                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 653                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 654                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 655                                 return false;
 656                         }
 657
 658                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 659                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 660                         if (Post::exists($condition)) {
 661                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 662                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 663                                 return false;
 664                         }
 665                 }
 666
 667                 return true;
 668         }
 669
 670         /**
 671          * Check if the item array is too old
 672          *
 673          * @param array $item
 674          * @return boolean item is too old
 675          */
 676         public static function isTooOld(array $item)
 677         {
 678                 // check for create date and expire time
 679                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 680
 681                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 682                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 683                         $expire_interval = $user['expire'];
 684                 }
 685
 686                 if (($expire_interval > 0) && !empty($item['created'])) {
 687                         $expire_date = time() - ($expire_interval * 86400);
 688                         $created_date = strtotime($item['created']);
 689                         if ($created_date < $expire_date) {
 690                                 Logger::notice('Item created before expiration interval.', [
 691                                         'created' => date('c', $created_date),
 692                                         'expired' => date('c', $expire_date),
 693                                         '$item' => $item
 694                                 ]);
 695                                 return true;
 696                         }
 697                 }
 698
 699                 return false;
 700         }
 701
 702         /**
 703          * Return the id of the given item array if it has been stored before
 704          *
 705          * @param array $item
 706          * @return integer item id
 707          */
 708         private static function getDuplicateID(array $item)
 709         {
 710                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 711                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 712                                 $item['uri-id'], $item['uid'],
 713                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 714                         $existing = Post::selectFirst(['id', 'network'], $condition);
 715                         if (DBA::isResult($existing)) {
 716                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 717                                 if ($item['uid'] != 0) {
 718                                         Logger::notice('Item already existed for user', [
 719                                                 'uri-id' => $item['uri-id'],
 720                                                 'uid' => $item['uid'],
 721                                                 'network' => $item['network'],
 722                                                 'existing_id' => $existing["id"],
 723                                                 'existing_network' => $existing["network"]
 724                                         ]);
 725                                 }
 726
 727                                 return $existing["id"];
 728                         }
 729                 }
 730                 return 0;
 731         }
 732
 733         /**
 734          * Fetch top-level parent data for the given item array
 735          *
 736          * @param array $item
 737          * @return array item array with parent data
 738          * @throws \Exception
 739          */
 740         private static function getTopLevelParent(array $item)
 741         {
 742                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 743                         'uri-id', 'parent-uri-id',
 744                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 745                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
 746                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 747                 $params = ['order' => ['id' => false]];
 748                 $parent = Post::selectFirst($fields, $condition, $params);
 749
 750                 if (!DBA::isResult($parent)) {
 751                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 752                         return [];
 753                 }
 754
 755                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 756                         return $parent;
 757                 }
 758
 759                 $condition = ['uri-id' => $parent['parent-uri-id'],
 760                         'parent-uri-id' => $parent['parent-uri-id'],
 761                         'uid' => $parent['uid']];
 762                 $params = ['order' => ['id' => false]];
 763                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 764                 if (!DBA::isResult($toplevel_parent)) {
 765                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 766                         return [];
 767                 }
 768
 769                 return $toplevel_parent;
 770         }
 771
 772         /**
 773          * Get the gravity for the given item array
 774          *
 775          * @param array $item
 776          * @return integer gravity
 777          */
 778         private static function getGravity(array $item)
 779         {
 780                 $activity = DI::activity();
 781
 782                 if (isset($item['gravity'])) {
 783                         return intval($item['gravity']);
 784                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 785                         return GRAVITY_PARENT;
 786                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 787                         return GRAVITY_COMMENT;
 788                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 789                         return GRAVITY_ACTIVITY;
 790                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 791                         return GRAVITY_ACTIVITY;
 792                 }
 793                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 794                 return GRAVITY_UNKNOWN;   // Should not happen
 795         }
 796
 797         public static function insert($item, $notify = false, $dontcache = false)
 798         {
 799                 $structure = self::getItemFields();
 800
 801                 $orig_item = $item;
 802
 803                 $priority = PRIORITY_HIGH;
 804
 805                 // If it is a posting where users should get notifications, then define it as wall posting
 806                 if ($notify) {
 807                         $item['wall'] = 1;
 808                         $item['origin'] = 1;
 809                         $item['network'] = Protocol::DFRN;
 810                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 811                         $item['direction'] = Conversation::PUSH;
 812
 813                         if (in_array($notify, PRIORITIES)) {
 814                                 $priority = $notify;
 815                         }
 816                 } else {
 817                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 818                 }
 819
 820                 $uid = intval($item['uid']);
 821
 822                 $item['guid'] = self::guid($item, $notify);
 823                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 824
 825                 // Store URI data
 826                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 827
 828                 // Backward compatibility: parent-uri used to be the direct parent uri.
 829                 // If it is provided without a thr-parent, it probably is the old behavior.
 830                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 831                 $item['parent-uri'] = $item['thr-parent'];
 832
 833                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 834
 835                 // Store conversation data
 836                 $item = Conversation::insert($item);
 837
 838                 /*
 839                  * Do we already have this item?
 840                  * We have to check several networks since Friendica posts could be repeated
 841                  * via OStatus (maybe Diasporsa as well)
 842                  */
 843                 $duplicate = self::getDuplicateID($item);
 844                 if ($duplicate) {
 845                         return $duplicate;
 846                 }
 847
 848                 // Additional duplicate checks
 849                 /// @todo Check why the first duplication check returns the item number and the second a 0
 850                 if (self::isDuplicate($item)) {
 851                         return 0;
 852                 }
 853
 854                 $item['wall']          = intval($item['wall'] ?? 0);
 855                 $item['extid']         = trim($item['extid'] ?? '');
 856                 $item['author-name']   = trim($item['author-name'] ?? '');
 857                 $item['author-link']   = trim($item['author-link'] ?? '');
 858                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 859                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 860                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 861                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 862                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 863                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 864                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 865                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 866                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 867                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 868                 $item['location']      = trim($item['location'] ?? '');
 869                 $item['coord']         = trim($item['coord'] ?? '');
 870                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 871                 $item['deleted']       = 0;
 872                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
 873                 $item['verb']          = trim($item['verb'] ?? '');
 874                 $item['object-type']   = trim($item['object-type'] ?? '');
 875                 $item['object']        = trim($item['object'] ?? '');
 876                 $item['target-type']   = trim($item['target-type'] ?? '');
 877                 $item['target']        = trim($item['target'] ?? '');
 878                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 879                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 880                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 881                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 882                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 883                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 884                 $item['body']          = trim($item['body'] ?? '');
 885                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 886                 $item['app']           = trim($item['app'] ?? '');
 887                 $item['origin']        = intval($item['origin'] ?? 0);
 888                 $item['postopts']      = trim($item['postopts'] ?? '');
 889                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 890                 $item['event-id']      = intval($item['event-id'] ?? 0);
 891                 $item['inform']        = trim($item['inform'] ?? '');
 892                 $item['file']          = trim($item['file'] ?? '');
 893
 894                 // Items cannot be stored before they happen ...
 895                 if ($item['created'] > DateTimeFormat::utcNow()) {
 896                         $item['created'] = DateTimeFormat::utcNow();
 897                 }
 898
 899                 // We haven't invented time travel by now.
 900                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 901                         $item['edited'] = DateTimeFormat::utcNow();
 902                 }
 903
 904                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 905
 906                 $item['gravity'] = self::getGravity($item);
 907
 908                 $item['language'] = self::getLanguage($item);
 909
 910                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 911                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 912                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 913
 914                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 915                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 916                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 917
 918                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 919                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 920                         $item['post-type'] = self::PT_FOLLOWER;
 921                 }
 922
 923                 // Ensure that there is an avatar cache
 924                 Contact::checkAvatarCache($item['author-id']);
 925                 Contact::checkAvatarCache($item['owner-id']);
 926
 927                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 928                 $item["contact-id"] = self::contactId($item);
 929
 930                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 931                         self::isTooOld($item)) {
 932                         Logger::info('Item is too old', ['item' => $item]);
 933                         return 0;
 934                 }
 935
 936                 if (!self::isValid($item)) {
 937                         return 0;
 938                 }
 939
 940                 if ($item['gravity'] !== GRAVITY_PARENT) {
 941                         $toplevel_parent = self::getTopLevelParent($item);
 942                         if (empty($toplevel_parent)) {
 943                                 return 0;
 944                         }
 945
 946                         // If the thread originated from this node, we check the permission against the thread starter
 947                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 948                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 949                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 950                                 return 0;
 951                         }
 952
 953                         $parent_id             = $toplevel_parent['id'];
 954                         $item['parent-uri']    = $toplevel_parent['uri'];
 955                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 956                         $item['deleted']       = $toplevel_parent['deleted'];
 957                         $item['allow_cid']     = $toplevel_parent['allow_cid'];
 958                         $item['allow_gid']     = $toplevel_parent['allow_gid'];
 959                         $item['deny_cid']      = $toplevel_parent['deny_cid'];
 960                         $item['deny_gid']      = $toplevel_parent['deny_gid'];
 961                         $parent_origin         = $toplevel_parent['origin'];
 962
 963                         // Don't federate received participation messages
 964                         if ($item['verb'] != Activity::FOLLOW) {
 965                                 $item['wall'] = $toplevel_parent['wall'];
 966                         } else {
 967                                 $item['wall'] = false;
 968                         }
 969
 970                         /*
 971                          * If the parent is private, force privacy for the entire conversation
 972                          * This differs from the above settings as it subtly allows comments from
 973                          * email correspondents to be private even if the overall thread is not.
 974                          */
 975                         if ($toplevel_parent['private']) {
 976                                 $item['private'] = $toplevel_parent['private'];
 977                         }
 978
 979                         /*
 980                          * Edge case. We host a public forum that was originally posted to privately.
 981                          * The original author commented, but as this is a comment, the permissions
 982                          * weren't fixed up so it will still show the comment as private unless we fix it here.
 983                          */
 984                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
 985                                 $item['private'] = self::PUBLIC;
 986                         }
 987
 988                         // If its a post that originated here then tag the thread as "mention"
 989                         if ($item['origin'] && $item['uid']) {
 990                                 DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
 991                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'uid' => $item['uid']]);
 992                         }
 993
 994                         // Update the contact relations
 995                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 996
 997                         unset($item['parent_origin']);
 998                 } else {
 999                         $parent_id = 0;
1000                         $parent_origin = $item['origin'];
1001                 }
1002
1003                 // We don't store the causer link, only the id
1004                 unset($item['causer-link']);
1005
1006                 // We don't store these fields anymore in the item table
1007                 unset($item['author-link']);
1008                 unset($item['author-name']);
1009                 unset($item['author-avatar']);
1010                 unset($item['author-network']);
1011
1012                 unset($item['owner-link']);
1013                 unset($item['owner-name']);
1014                 unset($item['owner-avatar']);
1015
1016                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1017                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1018
1019                 // Is this item available in the global items (with uid=0)?
1020                 if ($item["uid"] == 0) {
1021                         $item["global"] = true;
1022
1023                         // Set the global flag on all items if this was a global item entry
1024                         DBA::update('item', ['global' => true], ['uri-id' => $item['uri-id']]);
1025                 } else {
1026                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1027                 }
1028
1029                 // ACL settings
1030                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
1031                         $item["private"] = self::PRIVATE;
1032                 }
1033
1034                 if ($notify) {
1035                         $item['edit'] = false;
1036                         $item['parent'] = $parent_id;
1037                         Hook::callAll('post_local', $item);
1038                         unset($item['edit']);
1039                 } else {
1040                         Hook::callAll('post_remote', $item);
1041                 }
1042
1043                 // Set after the insert because top-level posts are self-referencing
1044                 unset($item['parent']);
1045
1046                 if (!empty($item['cancel'])) {
1047                         Logger::log('post cancelled by addon.');
1048                         return 0;
1049                 }
1050
1051                 if (empty($item['vid']) && !empty($item['verb'])) {
1052                         $item['vid'] = Verb::getID($item['verb']);
1053                 }
1054
1055                 // Creates or assigns the permission set
1056                 $item['psid'] = PermissionSet::getIdFromACL(
1057                         $item['uid'],
1058                         $item['allow_cid'],
1059                         $item['allow_gid'],
1060                         $item['deny_cid'],
1061                         $item['deny_gid']
1062                 );
1063
1064                 unset($item['allow_cid']);
1065                 unset($item['allow_gid']);
1066                 unset($item['deny_cid']);
1067                 unset($item['deny_gid']);
1068
1069                 // This array field is used to trigger some automatic reactions
1070                 // It is mainly used in the "post_local" hook.
1071                 unset($item['api_source']);
1072
1073                 if ($item['verb'] == Activity::ANNOUNCE) {
1074                         self::setOwnerforResharedItem($item);
1075                 }
1076
1077                 // Remove all media attachments from the body and store them in the post-media table
1078                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1079                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1080
1081                 // Check for hashtags in the body and repair or add hashtag links
1082                 $item['body'] = self::setHashtags($item['body']);
1083
1084                 if (!empty($item['attach'])) {
1085                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1086                 }
1087
1088                 // Fill the cache field
1089                 self::putInCache($item);
1090
1091                 if (stristr($item['verb'], Activity::POKE)) {
1092                         $notify_type = Delivery::POKE;
1093                 } else {
1094                         $notify_type = Delivery::POST;
1095                 }
1096
1097                 if (!in_array($item['verb'], self::ACTIVITIES) && !self::insertContent($item)) {
1098                         // This shouldn't happen
1099                         Logger::warning('No content stored, quitting', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'causer-id' => ($item['causer-id'] ?? 0), 'post-type' => $item['post-type'], 'network' => $item['network']]);
1100                         return 0;
1101                 }
1102
1103                 $body = $item['body'];
1104                 $verb = $item['verb'];
1105
1106                 // We just remove everything that is content
1107                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1108                         unset($item[$field]);
1109                 }
1110
1111                 unset($item['activity']);
1112
1113                 // Filling item related side tables
1114
1115                 // Diaspora signature
1116                 if (!empty($item['diaspora_signed_text'])) {
1117                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1118                 }
1119
1120                 unset($item['diaspora_signed_text']);
1121
1122                 // Attached file links
1123                 if (!empty($item['file'])) {
1124                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1125                 }
1126
1127                 unset($item['file']);
1128
1129                 // Delivery relevant data
1130                 $delivery_data = Post\DeliveryData::extractFields($item);
1131                 unset($item['postopts']);
1132                 unset($item['inform']);
1133
1134                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1135                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1136                 }
1137
1138                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1139                 if (!Tag::existsForPost($item['uri-id'])) {
1140                         Tag::storeFromBody($item['uri-id'], $body);
1141                 }
1142
1143                 if (Post\User::insert($item['uri-id'], $item['uid'], $item)) {
1144                         // Remove all fields that aren't part of the item table
1145                         foreach ($item as $field => $value) {
1146                                 if (!in_array($field, $structure['item'])) {
1147                                         unset($item[$field]);
1148                                 }
1149                         }
1150
1151                         $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'network' => $item['network']];
1152                         if (Post::exists($condition)) {
1153                                 Logger::notice('Item is already inserted - aborting', $condition);
1154                                 return 0;
1155                         }
1156
1157                         $result = DBA::insert('item', $item);
1158
1159                         // When the item was successfully stored we fetch the ID of the item.
1160                         $current_post = DBA::lastInsertId();
1161                 } else {
1162                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1163                         return 0;
1164                 }
1165
1166                 if (empty($current_post) || !DBA::isResult($result)) {
1167                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1168                         Logger::warning('Could not store item. it will be spooled', ['result' => $result, 'id' => $current_post]);
1169                         self::spool($orig_item);
1170                         return 0;
1171                 }
1172
1173                 Logger::notice('created item', ['id' => $current_post, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1174
1175                 if (!$parent_id || ($item['gravity'] === GRAVITY_PARENT)) {
1176                         $parent_id = $current_post;
1177                 }
1178
1179                 // Set parent id
1180                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1181
1182                 $item['id'] = $current_post;
1183                 $item['parent'] = $parent_id;
1184
1185                 // update the commented timestamp on the parent
1186                 if (DI::config()->get('system', 'like_no_comment')) {
1187                         // Update when it is a comment
1188                         $update_commented = in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1189                 } else {
1190                         // Update when it isn't a follow or tag verb
1191                         $update_commented = !in_array($verb, [Activity::FOLLOW, Activity::TAG]);
1192                 }
1193
1194                 if ($update_commented) {
1195                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1196                 } else {
1197                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1198                 }
1199
1200                 if ($item['gravity'] === GRAVITY_PARENT) {
1201                         self::addThread($current_post);
1202                 } else {
1203                         self::updateThread($parent_id);
1204                 }
1205
1206                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1207                 if (self::tagDeliver($item['uid'], $current_post)) {
1208                         // Get the user information for the logging
1209                         $user = User::getById($uid);
1210
1211                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1212                         return 0;
1213                 }
1214
1215                 if (!$dontcache) {
1216                         $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1217                         if (DBA::isResult($posted_item)) {
1218                                 if ($notify) {
1219                                         Hook::callAll('post_local_end', $posted_item);
1220                                 } else {
1221                                         Hook::callAll('post_remote_end', $posted_item);
1222                                 }
1223                         } else {
1224                                 Logger::log('new item not found in DB, id ' . $current_post);
1225                         }
1226                 }
1227
1228                 if ($item['gravity'] === GRAVITY_PARENT) {
1229                         self::addShadow($current_post);
1230                 } else {
1231                         self::addShadowPost($current_post);
1232                 }
1233
1234                 self::updateContact($item);
1235
1236                 UserItem::setNotification($current_post);
1237
1238                 check_user_notification($current_post);
1239
1240                 // Distribute items to users who subscribed to their tags
1241                 self::distributeByTags($item);
1242
1243                 // Automatically reshare the item if the "remote_self" option is selected
1244                 self::autoReshare($item);
1245
1246                 $transmit = $notify || ($item['visible'] && ($parent_origin || $item['origin']));
1247
1248                 if ($transmit) {
1249                         $transmit_item = Post::selectFirst(['verb', 'origin'], ['id' => $item['id']]);
1250                         // Don't relay participation messages
1251                         if (($transmit_item['verb'] == Activity::FOLLOW) &&
1252                                 (!$transmit_item['origin'] || ($item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1253                                 Logger::info('Participation messages will not be relayed', ['item' => $item['id'], 'uri' => $item['uri'], 'verb' => $transmit_item['verb']]);
1254                                 $transmit = false;
1255                         }
1256                 }
1257
1258                 if ($transmit) {
1259                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
1260                 }
1261
1262                 return $current_post;
1263         }
1264
1265         /**
1266          * Change the owner of a parent item if it had been shared by a forum
1267          *
1268          * (public) forum posts in the new format consist of the regular post by the author
1269          * followed by an announce message sent from the forum account.
1270          * Changing the owner helps in grouping forum posts.
1271          *
1272          * @param array $item
1273          * @return void
1274          */
1275         private static function setOwnerforResharedItem(array $item)
1276         {
1277                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-type'],
1278                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1279                 if (!DBA::isResult($parent)) {
1280                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1281                         return;
1282                 }
1283
1284                 $author = Contact::selectFirst(['url', 'contact-type'], ['id' => $item['author-id']]);
1285                 if (!DBA::isResult($author)) {
1286                         Logger::error('Author not found', ['id' => $item['author-id']]);
1287                         return;
1288                 }
1289
1290                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1291                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1292                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid']]);
1293                         return;
1294                 }
1295
1296                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1297                         if ($parent['post-type'] == self::PT_ANNOUNCEMENT) {
1298                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1299                                 return;
1300                         }
1301
1302                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1303                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1304                                 return;
1305                         }
1306                         self::update(['post-type' => self::PT_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1307                         Logger::info('Set announcement post-type', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1308                         return;
1309                 }
1310
1311                 self::update(['owner-id' => $item['author-id'], 'contact-id' => $cid], ['id' => $parent['id']]);
1312                 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]);
1313         }
1314
1315         /**
1316          * Distribute the given item to users who subscribed to their tags
1317          *
1318          * @param array $item     Processed item
1319          */
1320         private static function distributeByTags(array $item)
1321         {
1322                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1323                         return;
1324                 }
1325
1326                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1327                 foreach ($uids as $uid) {
1328                         if (Contact::isSharing($item['author-id'], $uid)) {
1329                                 $fields = [];
1330                         } else {
1331                                 $fields = ['post-type' => self::PT_TAG];
1332                         }
1333
1334                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1335                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1336                 }
1337         }
1338
1339         /**
1340          * Insert a new item content entry
1341          *
1342          * @param array $item The item fields that are to be inserted
1343          * @return bool "true" if content was inserted or already existed
1344          * @throws \Exception
1345          */
1346         private static function insertContent(array $item)
1347         {
1348                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
1349
1350                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1351                         if (isset($item[$field])) {
1352                                 $fields[$field] = $item[$field];
1353                         }
1354                 }
1355
1356                 $found = DBA::exists('item-content', ['uri-id' => $item['uri-id']]);
1357                 if ($found) {
1358                         Logger::info('Existing content found', ['uri-id' => $item['uri-id'], 'uri' => $item['uri']]);
1359                         return true;
1360                 }
1361
1362                 DBA::insert('item-content', $fields, Database::INSERT_IGNORE);
1363
1364                 $found = DBA::exists('item-content', ['uri-id' => $item['uri-id']]);
1365                 if ($found) {
1366                         Logger::notice('Content inserted', ['uri-id' => $item['uri-id'], 'uri' => $item['uri']]);
1367                         return true;
1368                 }
1369
1370                 // This shouldn't happen.
1371                 Logger::error("Content wasn't inserted", $item);
1372                 return false;
1373         }
1374
1375         /**
1376          * Update existing item content entries
1377          *
1378          * @param array $item      The item fields that are to be changed
1379          * @param array $condition The condition for finding the item content entries
1380          * @throws \Exception
1381          */
1382         private static function updateContent($item, $condition)
1383         {
1384                 // We have to select only the fields from the "item-content" table
1385                 $fields = [];
1386                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1387                         if (isset($item[$field])) {
1388                                 $fields[$field] = $item[$field];
1389                         }
1390                 }
1391
1392                 if (empty($fields)) {
1393                         return;
1394                 }
1395
1396                 DBA::update('item-content', $fields, $condition, true);
1397                 Logger::info('Updated content', ['condition' => $condition]);
1398         }
1399
1400         /**
1401          * Distributes public items to the receivers
1402          *
1403          * @param integer $itemid      Item ID that should be added
1404          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1405          * @throws \Exception
1406          */
1407         public static function distribute($itemid, $signed_text = '')
1408         {
1409                 $condition = ["`id` IN (SELECT `parent` FROM `post-view` WHERE `id` = ?)", $itemid];
1410                 $parent = Post::selectFirst(['owner-id'], $condition);
1411                 if (!DBA::isResult($parent)) {
1412                         return;
1413                 }
1414
1415                 // Only distribute public items from native networks
1416                 $condition = ['id' => $itemid, 'uid' => 0,
1417                         'network' => array_merge(Protocol::FEDERATED ,['']),
1418                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1419                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1420                 if (!DBA::isResult($item)) {
1421                         return;
1422                 }
1423
1424                 $origin = $item['origin'];
1425
1426                 $users = [];
1427
1428                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1429                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1430                 if (!DBA::isResult($owner)) {
1431                         return;
1432                 }
1433
1434                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1435                 $contacts = DBA::select('contact', ['uid'], $condition);
1436                 while ($contact = DBA::fetch($contacts)) {
1437                         if ($contact['uid'] == 0) {
1438                                 continue;
1439                         }
1440
1441                         $users[$contact['uid']] = $contact['uid'];
1442                 }
1443                 DBA::close($contacts);
1444
1445                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1446                 $contacts = DBA::select('contact', ['uid'], $condition);
1447                 while ($contact = DBA::fetch($contacts)) {
1448                         if ($contact['uid'] == 0) {
1449                                 continue;
1450                         }
1451
1452                         $users[$contact['uid']] = $contact['uid'];
1453                 }
1454                 DBA::close($contacts);
1455
1456                 if (!empty($owner['alias'])) {
1457                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1458                         $contacts = DBA::select('contact', ['uid'], $condition);
1459                         while ($contact = DBA::fetch($contacts)) {
1460                                 if ($contact['uid'] == 0) {
1461                                         continue;
1462                                 }
1463
1464                                 $users[$contact['uid']] = $contact['uid'];
1465                         }
1466                         DBA::close($contacts);
1467                 }
1468
1469                 $origin_uid = 0;
1470
1471                 if ($item['uri-id'] != $item['parent-uri-id']) {
1472                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1473                         while ($parent = Post::fetch($parents)) {
1474                                 $users[$parent['uid']] = $parent['uid'];
1475                                 if ($parent['origin'] && !$origin) {
1476                                         $origin_uid = $parent['uid'];
1477                                 }
1478                         }
1479                         DBA::close($parents);
1480                 }
1481
1482                 foreach ($users as $uid) {
1483                         if ($origin_uid == $uid) {
1484                                 $item['diaspora_signed_text'] = $signed_text;
1485                         }
1486                         self::storeForUser($item, $uid);
1487                 }
1488         }
1489
1490         /**
1491          * Store a public item defined by their URI-ID for the given users
1492          *
1493          * @param integer $uri_id URI-ID of the given item
1494          * @param integer $uid    The user that will receive the item entry
1495          * @param array   $fields Additional fields to be stored
1496          * @return integer stored item id
1497          */
1498         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [])
1499         {
1500                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => 0]);
1501                 if (!DBA::isResult($item)) {
1502                         return 0;
1503                 }
1504
1505                 if (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED)) {
1506                         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']]);
1507                         return 0;
1508                 }
1509
1510                 $item['post-type'] = self::PT_STORED;
1511
1512                 $item = array_merge($item, $fields);
1513
1514                 $stored = self::storeForUser($item, $uid);
1515                 Logger::info('Public item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1516                 return $stored;
1517         }
1518
1519         /**
1520          * Store a public item array for the given users
1521          *
1522          * @param array   $item   The item entry that will be stored
1523          * @param integer $uid    The user that will receive the item entry
1524          * @return integer stored item id
1525          * @throws \Exception
1526          */
1527         private static function storeForUser(array $item, int $uid)
1528         {
1529                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1530                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1531                         return 0;
1532                 }
1533
1534                 unset($item['id']);
1535                 unset($item['parent']);
1536                 unset($item['mention']);
1537                 unset($item['starred']);
1538                 unset($item['unseen']);
1539                 unset($item['psid']);
1540
1541                 $item['uid'] = $uid;
1542                 $item['origin'] = 0;
1543                 $item['wall'] = 0;
1544
1545                 if ($item['gravity'] == GRAVITY_PARENT) {
1546                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1547                 } else {
1548                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1549                 }
1550
1551                 if (!empty($contact['id'])) {
1552                         $item['contact-id'] = $contact['id'];
1553                 } else {
1554                         // Shouldn't happen at all
1555                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1556                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1557                         if (!DBA::isResult($self)) {
1558                                 // Shouldn't happen even less
1559                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1560                                 return 0;
1561                         }
1562                         $item['contact-id'] = $self['id'];
1563                 }
1564
1565                 /// @todo Handling of "event-id"
1566
1567                 $notify = false;
1568                 if ($item['gravity'] == GRAVITY_PARENT) {
1569                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1570                         if (DBA::isResult($contact)) {
1571                                 $notify = self::isRemoteSelf($contact, $item);
1572                         }
1573                 }
1574
1575                 $distributed = self::insert($item, $notify, true);
1576
1577                 if (!$distributed) {
1578                         Logger::info("Distributed public item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1579                 } else {
1580                         Logger::info('Distributed public item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1581                 }
1582                 return $distributed;
1583         }
1584
1585         /**
1586          * Add a shadow entry for a given item id that is a thread starter
1587          *
1588          * We store every public item entry additionally with the user id "0".
1589          * This is used for the community page and for the search.
1590          * It is planned that in the future we will store public item entries only once.
1591          *
1592          * @param integer $itemid Item ID that should be added
1593          * @throws \Exception
1594          */
1595         private static function addShadow($itemid)
1596         {
1597                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri-id'];
1598                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1599                 $item = Post::selectFirst($fields, $condition);
1600
1601                 if (!DBA::isResult($item)) {
1602                         return;
1603                 }
1604
1605                 // is it already a copy?
1606                 if (($itemid == 0) || ($item['uid'] == 0)) {
1607                         return;
1608                 }
1609
1610                 // Is it a visible public post?
1611                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == self::PRIVATE)) {
1612                         return;
1613                 }
1614
1615                 // is it an entry from a connector? Only add an entry for natively connected networks
1616                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1617                         return;
1618                 }
1619
1620                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1621                         return;
1622                 }
1623
1624                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1625
1626                 if (DBA::isResult($item)) {
1627                         // Preparing public shadow (removing user specific data)
1628                         $item['uid'] = 0;
1629                         unset($item['id']);
1630                         unset($item['parent']);
1631                         unset($item['wall']);
1632                         unset($item['mention']);
1633                         unset($item['origin']);
1634                         unset($item['starred']);
1635                         unset($item['postopts']);
1636                         unset($item['inform']);
1637                         unset($item['post-type']);
1638                         if ($item['uri-id'] == $item['parent-uri-id']) {
1639                                 $item['contact-id'] = $item['owner-id'];
1640                         } else {
1641                                 $item['contact-id'] = $item['author-id'];
1642                         }
1643
1644                         $public_shadow = self::insert($item, false, true);
1645
1646                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1647                 }
1648         }
1649
1650         /**
1651          * Add a shadow entry for a given item id that is a comment
1652          *
1653          * This function does the same like the function above - but for comments
1654          *
1655          * @param integer $itemid Item ID that should be added
1656          * @throws \Exception
1657          */
1658         private static function addShadowPost($itemid)
1659         {
1660                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1661                 if (!DBA::isResult($item)) {
1662                         return;
1663                 }
1664
1665                 // Is it a toplevel post?
1666                 if ($item['gravity'] == GRAVITY_PARENT) {
1667                         self::addShadow($itemid);
1668                         return;
1669                 }
1670
1671                 // Is this a shadow entry?
1672                 if ($item['uid'] == 0) {
1673                         return;
1674                 }
1675
1676                 // Is there a shadow parent?
1677                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1678                         return;
1679                 }
1680
1681                 // Is there already a shadow entry?
1682                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1683                         return;
1684                 }
1685
1686                 // Save "origin" and "parent" state
1687                 $origin = $item['origin'];
1688                 $parent = $item['parent'];
1689
1690                 // Preparing public shadow (removing user specific data)
1691                 $item['uid'] = 0;
1692                 unset($item['id']);
1693                 unset($item['parent']);
1694                 unset($item['wall']);
1695                 unset($item['mention']);
1696                 unset($item['origin']);
1697                 unset($item['starred']);
1698                 unset($item['postopts']);
1699                 unset($item['inform']);
1700                 unset($item['post-type']);
1701                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1702
1703                 $public_shadow = self::insert($item, false, true);
1704
1705                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1706
1707                 // If this was a comment to a Diaspora post we don't get our comment back.
1708                 // This means that we have to distribute the comment by ourselves.
1709                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1710                         self::distribute($public_shadow);
1711                 }
1712         }
1713
1714         /**
1715          * Adds a language specification in a "language" element of given $arr.
1716          * Expects "body" element to exist in $arr.
1717          *
1718          * @param array $item
1719          * @return string detected language
1720          * @throws \Text_LanguageDetect_Exception
1721          */
1722         private static function getLanguage(array $item)
1723         {
1724                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1725                         return '';
1726                 }
1727
1728                 // Convert attachments to links
1729                 $naked_body = BBCode::removeAttachment($item['body']);
1730                 if (empty($naked_body)) {
1731                         return '';
1732                 }
1733
1734                 // Remove links and pictures
1735                 $naked_body = BBCode::removeLinks($naked_body);
1736
1737                 // Convert the title and the body to plain text
1738                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1739
1740                 // Remove possibly remaining links
1741                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1742
1743                 if (empty($naked_body)) {
1744                         return '';
1745                 }
1746
1747                 $ld = new Language(DI::l10n()->getAvailableLanguages());
1748                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1749                 if (is_array($languages)) {
1750                         return json_encode($languages);
1751                 }
1752
1753                 return '';
1754         }
1755
1756         public static function getLanguageMessage(array $item)
1757         {
1758                 $iso639 = new \Matriphe\ISO639\ISO639;
1759
1760                 $used_languages = '';
1761                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1762                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1763                 }
1764                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1765                 return $used_languages;
1766         }
1767
1768         /**
1769          * Creates an unique guid out of a given uri
1770          *
1771          * @param string $uri uri of an item entry
1772          * @param string $host hostname for the GUID prefix
1773          * @return string unique guid
1774          */
1775         public static function guidFromUri($uri, $host)
1776         {
1777                 // Our regular guid routine is using this kind of prefix as well
1778                 // We have to avoid that different routines could accidentally create the same value
1779                 $parsed = parse_url($uri);
1780
1781                 // We use a hash of the hostname as prefix for the guid
1782                 $guid_prefix = hash("crc32", $host);
1783
1784                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1785                 unset($parsed["scheme"]);
1786
1787                 // Glue it together to be able to make a hash from it
1788                 $host_id = implode("/", $parsed);
1789
1790                 // We could use any hash algorithm since it isn't a security issue
1791                 $host_hash = hash("ripemd128", $host_id);
1792
1793                 return $guid_prefix.$host_hash;
1794         }
1795
1796         /**
1797          * generate an unique URI
1798          *
1799          * @param integer $uid  User id
1800          * @param string  $guid An existing GUID (Otherwise it will be generated)
1801          *
1802          * @return string
1803          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1804          */
1805         public static function newURI($uid, $guid = "")
1806         {
1807                 if ($guid == "") {
1808                         $guid = System::createUUID();
1809                 }
1810
1811                 return DI::baseUrl()->get() . '/objects/' . $guid;
1812         }
1813
1814         /**
1815          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1816          *
1817          * This can be used to filter for inactive contacts.
1818          * Only do this for public postings to avoid privacy problems, since poco data is public.
1819          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1820          *
1821          * @param array $arr Contains the just posted item record
1822          * @throws \Exception
1823          */
1824         private static function updateContact($arr)
1825         {
1826                 // Unarchive the author
1827                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1828                 if (DBA::isResult($contact)) {
1829                         Contact::unmarkForArchival($contact);
1830                 }
1831
1832                 // Unarchive the contact if it's not our own contact
1833                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1834                 if (DBA::isResult($contact)) {
1835                         Contact::unmarkForArchival($contact);
1836                 }
1837
1838                 /// @todo On private posts we could obfuscate the date
1839                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1840
1841                 // Is it a forum? Then we don't care about the rules from above
1842                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1843                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1844                                 $update = true;
1845                         }
1846                 }
1847
1848                 if ($update) {
1849                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1850                         // So we have to ensure to only update the last item when it had been our own post,
1851                         // or it had been done by a "regular" contact.
1852                         if (!empty($arr['wall'])) {
1853                                 $condition = ['id' => $arr['contact-id']];
1854                         } else {
1855                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1856                         }
1857                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1858                 }
1859                 // Now do the same for the system wide contacts with uid=0
1860                 if ($arr['private'] != self::PRIVATE) {
1861                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1862                                 ['id' => $arr['owner-id']]);
1863
1864                         if ($arr['owner-id'] != $arr['author-id']) {
1865                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1866                                         ['id' => $arr['author-id']]);
1867                         }
1868                 }
1869         }
1870
1871         public static function setHashtags($body)
1872         {
1873                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1874                         $tags = BBCode::getTags($body);
1875
1876                         // No hashtags?
1877                         if (!count($tags)) {
1878                                 return $body;
1879                         }
1880
1881                         // This sorting is important when there are hashtags that are part of other hashtags
1882                         // Otherwise there could be problems with hashtags like #test and #test2
1883                         // Because of this we are sorting from the longest to the shortest tag.
1884                         usort($tags, function ($a, $b) {
1885                                 return strlen($b) <=> strlen($a);
1886                         });
1887
1888                         $URLSearchString = "^\[\]";
1889
1890                         // All hashtags should point to the home server if "local_tags" is activated
1891                         if (DI::config()->get('system', 'local_tags')) {
1892                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1893                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1894                         }
1895
1896                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1897                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1898                                 function ($match) {
1899                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1900                                 }, $body);
1901
1902                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1903                                 function ($match) {
1904                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1905                                 }, $body);
1906
1907                         $body = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1908                                 function ($match) {
1909                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1910                                 }, $body);
1911
1912                         // Repair recursive urls
1913                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1914                                 "&num;$2", $body);
1915
1916                         foreach ($tags as $tag) {
1917                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1918                                         continue;
1919                                 }
1920
1921                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1922                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1923
1924                                 $body = str_replace($tag, $newtag, $body);
1925                         }
1926
1927                         // Convert back the masked hashtags
1928                         $body = str_replace("&num;", "#", $body);
1929
1930                         return $body;
1931                 });
1932
1933                 return $body;
1934         }
1935
1936         /**
1937          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1938          *
1939          * @param int $uid
1940          * @param int $item_id
1941          * @return boolean true if item was deleted, else false
1942          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1943          * @throws \ImagickException
1944          */
1945         private static function tagDeliver($uid, $item_id)
1946         {
1947                 $mention = false;
1948
1949                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
1950                 if (!DBA::isResult($user)) {
1951                         return false;
1952                 }
1953
1954                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
1955                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
1956
1957                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
1958                 if (!DBA::isResult($item)) {
1959                         return false;
1960                 }
1961
1962                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
1963
1964                 /*
1965                  * Diaspora uses their own hardwired link URL in @-tags
1966                  * instead of the one we supply with webfinger
1967                  */
1968                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
1969
1970                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1971                 if ($cnt) {
1972                         foreach ($matches as $mtch) {
1973                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
1974                                         $mention = true;
1975                                         Logger::log('mention found: ' . $mtch[2]);
1976                                 }
1977                         }
1978                 }
1979
1980                 if (!$mention) {
1981                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1982                         foreach ($tags as $tag) {
1983                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
1984                                         $mention = true;
1985                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
1986                                 }
1987                         }
1988                 }
1989
1990                 if (!$mention) {
1991                         if (($community_page || $prvgroup) &&
1992                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
1993                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
1994                                 DBA::delete('item', ['id' => $item_id]);
1995                                 return true;
1996                         }
1997                         return false;
1998                 }
1999
2000                 $arr = ['item' => $item, 'user' => $user];
2001
2002                 Hook::callAll('tagged', $arr);
2003
2004                 if (!$community_page && !$prvgroup) {
2005                         return false;
2006                 }
2007
2008                 /*
2009                  * tgroup delivery - setup a second delivery chain
2010                  * prevent delivery looping - only proceed
2011                  * if the message originated elsewhere and is a top-level post
2012                  */
2013                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2014                         return false;
2015                 }
2016
2017                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2018                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2019                 if (!DBA::isResult($self)) {
2020                         return false;
2021                 }
2022
2023                 $owner_id = Contact::getIdForURL($self['url']);
2024
2025                 // also reset all the privacy bits to the forum default permissions
2026
2027                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2028
2029                 $psid = PermissionSet::getIdFromACL(
2030                         $user['uid'],
2031                         $user['allow_cid'],
2032                         $user['allow_gid'],
2033                         $user['deny_cid'],
2034                         $user['deny_gid']
2035                 );
2036
2037                 $forum_mode = ($prvgroup ? 2 : 1);
2038
2039                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2040                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2041                 self::update($fields, ['id' => $item_id]);
2042
2043                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2044
2045                 self::performActivity($item_id, 'announce', $uid);
2046
2047                 return false;
2048         }
2049
2050         /**
2051          * Automatically reshare the item if the "remote_self" option is selected
2052          *
2053          * @param array $item
2054          * @return void
2055          */
2056         private static function autoReshare(array $item)
2057         {
2058                 if ($item['gravity'] != GRAVITY_PARENT) {
2059                         return;
2060                 }
2061
2062                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2063                         return;
2064                 }
2065
2066                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2067                         return;
2068                 }
2069
2070                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2071
2072                 self::performActivity($item['id'], 'announce', $item['uid']);
2073         }
2074
2075         public static function isRemoteSelf($contact, &$datarray)
2076         {
2077                 if (!$contact['remote_self']) {
2078                         return false;
2079                 }
2080
2081                 // Prevent the forwarding of posts that are forwarded
2082                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2083                         Logger::info('Already forwarded');
2084                         return false;
2085                 }
2086
2087                 // Prevent to forward already forwarded posts
2088                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2089                         Logger::info('Already forwarded (second test)');
2090                         return false;
2091                 }
2092
2093                 // Only forward posts
2094                 if ($datarray["verb"] != Activity::POST) {
2095                         Logger::info('No post');
2096                         return false;
2097                 }
2098
2099                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2100                         Logger::info('Not public');
2101                         return false;
2102                 }
2103
2104                 $datarray2 = $datarray;
2105                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2106                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2107                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2108                                         ['uid' => $contact['uid'], 'self' => true]);
2109                         if (DBA::isResult($self)) {
2110                                 $datarray['contact-id'] = $self["id"];
2111
2112                                 $datarray['owner-name'] = $self["name"];
2113                                 $datarray['owner-link'] = $self["url"];
2114                                 $datarray['owner-avatar'] = $self["thumb"];
2115
2116                                 $datarray['author-name']   = $datarray['owner-name'];
2117                                 $datarray['author-link']   = $datarray['owner-link'];
2118                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2119
2120                                 unset($datarray['edited']);
2121
2122                                 unset($datarray['network']);
2123                                 unset($datarray['owner-id']);
2124                                 unset($datarray['author-id']);
2125                         }
2126
2127                         if ($contact['network'] != Protocol::FEED) {
2128                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2129                                 $datarray["guid"] = System::createUUID();
2130                                 unset($datarray["plink"]);
2131                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2132                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2133                                 $datarray["extid"] = Protocol::DFRN;
2134                                 $urlpart = parse_url($datarray2['author-link']);
2135                                 $datarray["app"] = $urlpart["host"];
2136                                 if (!empty($old_uri_id)) {
2137                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2138                                 }
2139
2140                                 unset($datarray["parent-uri"]);
2141                                 unset($datarray["thr-parent"]);
2142                         } else {
2143                                 $datarray['private'] = self::PUBLIC;
2144                         }
2145                 }
2146
2147                 if ($contact['network'] != Protocol::FEED) {
2148                         // Store the original post
2149                         $result = self::insert($datarray2);
2150                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2151                 } else {
2152                         $datarray["app"] = "Feed";
2153                         $result = true;
2154                 }
2155
2156                 // Trigger automatic reactions for addons
2157                 $datarray['api_source'] = true;
2158
2159                 // We have to tell the hooks who we are - this really should be improved
2160                 $_SESSION['authenticated'] = true;
2161                 $_SESSION['uid'] = $contact['uid'];
2162
2163                 return (bool)$result;
2164         }
2165
2166         /**
2167          *
2168          * @param string $s
2169          * @param int    $uid
2170          * @param array  $item
2171          * @param int    $cid
2172          * @return string
2173          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2174          * @throws \ImagickException
2175          */
2176         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2177         {
2178                 if (DI::config()->get('system', 'disable_embedded')) {
2179                         return $s;
2180                 }
2181
2182                 Logger::info('check for photos');
2183                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2184
2185                 $orig_body = $s;
2186                 $new_body = '';
2187
2188                 $img_start = strpos($orig_body, '[img');
2189                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2190                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2191
2192                 while (($img_st_close !== false) && ($img_len !== false)) {
2193                         $img_st_close++; // make it point to AFTER the closing bracket
2194                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2195
2196                         Logger::info('found photo', ['image' => $image]);
2197
2198                         if (stristr($image, $site . '/photo/')) {
2199                                 // Only embed locally hosted photos
2200                                 $replace = false;
2201                                 $i = basename($image);
2202                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2203                                 $x = strpos($i, '-');
2204
2205                                 if ($x) {
2206                                         $res = substr($i, $x + 1);
2207                                         $i = substr($i, 0, $x);
2208                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2209                                         if (DBA::isResult($photo)) {
2210                                                 /*
2211                                                  * Check to see if we should replace this photo link with an embedded image
2212                                                  * 1. No need to do so if the photo is public
2213                                                  * 2. If there's a contact-id provided, see if they're in the access list
2214                                                  *    for the photo. If so, embed it.
2215                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2216                                                  *    permissions, regardless of order but first check to see if they're an exact
2217                                                  *    match to save some processing overhead.
2218                                                  */
2219                                                 if (self::hasPermissions($photo)) {
2220                                                         if ($cid) {
2221                                                                 $recips = self::enumeratePermissions($photo);
2222                                                                 if (in_array($cid, $recips)) {
2223                                                                         $replace = true;
2224                                                                 }
2225                                                         } elseif ($item) {
2226                                                                 if (self::samePermissions($uid, $item, $photo)) {
2227                                                                         $replace = true;
2228                                                                 }
2229                                                         }
2230                                                 }
2231                                                 if ($replace) {
2232                                                         $photo_img = Photo::getImageForPhoto($photo);
2233                                                         // If a custom width and height were specified, apply before embedding
2234                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2235                                                                 Logger::info('scaling photo');
2236
2237                                                                 $width = intval($match[1]);
2238                                                                 $height = intval($match[2]);
2239
2240                                                                 $photo_img->scaleDown(max($width, $height));
2241                                                         }
2242
2243                                                         $data = $photo_img->asString();
2244                                                         $type = $photo_img->getType();
2245
2246                                                         Logger::info('replacing photo');
2247                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2248                                                         Logger::debug('replaced', ['image' => $image]);
2249                                                 }
2250                                         }
2251                                 }
2252                         }
2253
2254                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2255                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2256                         if ($orig_body === false) {
2257                                 $orig_body = '';
2258                         }
2259
2260                         $img_start = strpos($orig_body, '[img');
2261                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2262                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2263                 }
2264
2265                 $new_body = $new_body . $orig_body;
2266
2267                 return $new_body;
2268         }
2269
2270         private static function hasPermissions($obj)
2271         {
2272                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2273                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2274         }
2275
2276         private static function samePermissions($uid, $obj1, $obj2)
2277         {
2278                 // first part is easy. Check that these are exactly the same.
2279                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2280                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2281                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2282                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2283                         return true;
2284                 }
2285
2286                 // This is harder. Parse all the permissions and compare the resulting set.
2287                 $recipients1 = self::enumeratePermissions($obj1);
2288                 $recipients2 = self::enumeratePermissions($obj2);
2289                 sort($recipients1);
2290                 sort($recipients2);
2291
2292                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2293                 return ($recipients1 == $recipients2);
2294         }
2295
2296         /**
2297          * Returns an array of contact-ids that are allowed to see this object
2298          *
2299          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2300          * @param bool  $check_dead Prunes unavailable contacts from the result
2301          * @return array
2302          * @throws \Exception
2303          */
2304         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2305         {
2306                 $aclFormater = DI::aclFormatter();
2307
2308                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2309                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2310                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2311                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2312                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2313                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2314                 $recipients   = array_diff($recipients, $deny);
2315                 return $recipients;
2316         }
2317
2318         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2319         {
2320                 if (!$uid || ($days < 1)) {
2321                         return;
2322                 }
2323
2324                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2325                         $uid, GRAVITY_PARENT];
2326
2327                 /*
2328                  * $expire_network_only = save your own wall posts
2329                  * and just expire conversations started by others
2330                  */
2331                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2332
2333                 if ($expire_network_only) {
2334                         $condition[0] .= " AND NOT `wall`";
2335                 }
2336
2337                 if ($network != "") {
2338                         $condition[0] .= " AND `network` = ?";
2339                         $condition[] = $network;
2340                 }
2341
2342                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2343                 $condition[] = $days;
2344
2345                 $items = Post::select(['resource-id', 'starred', 'type', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2346
2347                 if (!DBA::isResult($items)) {
2348                         return;
2349                 }
2350
2351                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2352
2353                 // Forcing expiring of items - but not notes and marked items
2354                 if ($force) {
2355                         $expire_items = true;
2356                 }
2357
2358                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2359                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2360                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2361
2362                 $expired = 0;
2363
2364                 $priority = DI::config()->get('system', 'expire-notify-priority');
2365
2366                 while ($item = Post::fetch($items)) {
2367                         // don't expire filed items
2368                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2369                                 continue;
2370                         }
2371
2372                         // Only expire posts, not photos and photo comments
2373
2374                         if (!$expire_photos && strlen($item['resource-id'])) {
2375                                 continue;
2376                         } elseif (!$expire_starred && intval($item['starred'])) {
2377                                 continue;
2378                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == self::PT_PERSONAL_NOTE))) {
2379                                 continue;
2380                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2381                                 continue;
2382                         }
2383
2384                         self::markForDeletionById($item['id'], $priority);
2385
2386                         ++$expired;
2387                 }
2388                 DBA::close($items);
2389                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2390         }
2391
2392         public static function firstPostDate($uid, $wall = false)
2393         {
2394                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2395                 $params = ['order' => ['received' => false]];
2396                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
2397                 if (DBA::isResult($thread)) {
2398                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
2399                 }
2400                 return false;
2401         }
2402
2403         /**
2404          * add/remove activity to an item
2405          *
2406          * Toggle activities as like,dislike,attend of an item
2407          *
2408          * @param int $item_id
2409          * @param string $verb
2410          *            Activity verb. One of
2411          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2412          *            attendno, unattendno, attendmaybe, unattendmaybe,
2413          *            announce, unannouce
2414          * @return bool
2415          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2416          * @throws \ImagickException
2417          * @hook  'post_local_end'
2418          *            array $arr
2419          *            'post_id' => ID of posted item
2420          */
2421         public static function performActivity(int $item_id, string $verb, int $uid)
2422         {
2423                 if (empty($uid)) {
2424                         return false;
2425                 }
2426
2427                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2428
2429                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2430                 if (!DBA::isResult($item)) {
2431                         Logger::log('like: unknown item ' . $item_id);
2432                         return false;
2433                 }
2434
2435                 $uri_id = $item['uri-id'];
2436
2437                 if (!in_array($item['uid'], [0, $uid])) {
2438                         return false;
2439                 }
2440
2441                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2442                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2443                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2444                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2445                                 if (!DBA::isResult($item)) {
2446                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2447                                         return false;
2448                                 }
2449                         }
2450                 }
2451
2452                 // Retrieves the local post owner
2453                 $owner = User::getOwnerDataById($uid);
2454                 if (empty($owner)) {
2455                         Logger::info('Empty owner for user', ['uid' => $uid]);
2456                         return false;
2457                 }
2458
2459                 // Retrieve the current logged in user's public contact
2460                 $author_id = Contact::getIdForURL($owner['url']);
2461                 if (empty($author_id)) {
2462                         Logger::info('Empty public contact');
2463                         return false;
2464                 }
2465
2466                 $activity = null;
2467                 switch ($verb) {
2468                         case 'like':
2469                         case 'unlike':
2470                                 $activity = Activity::LIKE;
2471                                 break;
2472                         case 'dislike':
2473                         case 'undislike':
2474                                 $activity = Activity::DISLIKE;
2475                                 break;
2476                         case 'attendyes':
2477                         case 'unattendyes':
2478                                 $activity = Activity::ATTEND;
2479                                 break;
2480                         case 'attendno':
2481                         case 'unattendno':
2482                                 $activity = Activity::ATTENDNO;
2483                                 break;
2484                         case 'attendmaybe':
2485                         case 'unattendmaybe':
2486                                 $activity = Activity::ATTENDMAYBE;
2487                                 break;
2488                         case 'follow':
2489                         case 'unfollow':
2490                                 $activity = Activity::FOLLOW;
2491                                 break;
2492                         case 'announce':
2493                         case 'unannounce':
2494                                 $activity = Activity::ANNOUNCE;
2495                                 break;
2496                         default:
2497                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2498                                 return false;
2499                 }
2500
2501                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2502
2503                 // Enable activity toggling instead of on/off
2504                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2505
2506                 // Look for an existing verb row
2507                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2508                 if ($event_verb_flag) {
2509                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2510
2511                         // Translate to the index based activity index
2512                         $vids = [];
2513                         foreach ($verbs as $verb) {
2514                                 $vids[] = Verb::getID($verb);
2515                         }
2516                 } else {
2517                         $vids = Verb::getID($activity);
2518                 }
2519
2520                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2521                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2522                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2523
2524                 if (DBA::isResult($like_item)) {
2525                         /**
2526                          * Truth table for existing activities
2527                          *
2528                          * |          Inputs            ||      Outputs      |
2529                          * |----------------------------||-------------------|
2530                          * |  Mode  | Event | Same verb || Delete? | Return? |
2531                          * |--------|-------|-----------||---------|---------|
2532                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2533                          * | create |  Yes  |    No     ||   Yes   |   No    |
2534                          * | create |  No   |    Yes    ||   No    |   Yes   |
2535                          * | create |  No   |    No     ||        N/A†       |
2536                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2537                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2538                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2539                          * | delete |  No   |    No     ||        N/A†       |
2540                          * |--------|-------|-----------||---------|---------|
2541                          * |   A    |   B   |     C     || A xor C | !B or C |
2542                          *
2543                          * † Can't happen: It's impossible to find an existing non-event activity without
2544                          *                 the same verb because we are only looking for this single verb.
2545                          *
2546                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2547                          */
2548                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2549                                 self::markForDeletionById($like_item['id']);
2550                         }
2551
2552                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2553                                 return true;
2554                         }
2555                 }
2556
2557                 // No need to go further if we aren't creating anything
2558                 if ($mode == 'delete') {
2559                         return true;
2560                 }
2561
2562                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2563
2564                 $new_item = [
2565                         'guid'          => System::createUUID(),
2566                         'uri'           => self::newURI($item['uid']),
2567                         'uid'           => $item['uid'],
2568                         'contact-id'    => $owner['id'],
2569                         'wall'          => $item['wall'],
2570                         'origin'        => 1,
2571                         'network'       => Protocol::DFRN,
2572                         'protocol'      => Conversation::PARCEL_DIRECT,
2573                         'direction'     => Conversation::PUSH,
2574                         'gravity'       => GRAVITY_ACTIVITY,
2575                         'parent'        => $item['id'],
2576                         'thr-parent'    => $item['uri'],
2577                         'owner-id'      => $author_id,
2578                         'author-id'     => $author_id,
2579                         'body'          => $activity,
2580                         'verb'          => $activity,
2581                         'object-type'   => $objtype,
2582                         'allow_cid'     => $item['allow_cid'],
2583                         'allow_gid'     => $item['allow_gid'],
2584                         'deny_cid'      => $item['deny_cid'],
2585                         'deny_gid'      => $item['deny_gid'],
2586                         'visible'       => 1,
2587                         'unseen'        => 1,
2588                 ];
2589
2590                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2591                 if (!empty($signed)) {
2592                         $new_item['diaspora_signed_text'] = json_encode($signed);
2593                 }
2594
2595                 $new_item_id = self::insert($new_item);
2596
2597                 // If the parent item isn't visible then set it to visible
2598                 if (!$item['visible']) {
2599                         self::update(['visible' => true], ['id' => $item['id']]);
2600                 }
2601
2602                 $new_item['id'] = $new_item_id;
2603
2604                 Hook::callAll('post_local_end', $new_item);
2605
2606                 return true;
2607         }
2608
2609         private static function addThread($itemid, $onlyshadow = false)
2610         {
2611                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2612                         'moderated', 'visible', 'starred', 'contact-id', 'post-type', 'uri-id',
2613                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2614                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2615                 $item = Post::selectFirst($fields, $condition);
2616
2617                 if (!DBA::isResult($item)) {
2618                         return;
2619                 }
2620
2621                 $item['iid'] = $itemid;
2622
2623                 if (!$onlyshadow) {
2624                         $result = DBA::replace('thread', $item);
2625
2626                         Logger::info('Add thread', ['item' => $itemid, 'result' => $result]);
2627                 }
2628         }
2629
2630         private static function updateThread($itemid, $setmention = false)
2631         {
2632                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
2633                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id', 'uri-id',
2634                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
2635
2636                 $item = Post::selectFirst($fields, ['id' => $itemid, 'gravity' => GRAVITY_PARENT]);
2637                 if (!DBA::isResult($item)) {
2638                         return;
2639                 }
2640
2641                 if ($setmention) {
2642                         $item["mention"] = 1;
2643                 }
2644
2645                 $fields = [];
2646
2647                 foreach ($item as $field => $data) {
2648                         if (!in_array($field, ["guid"])) {
2649                                 $fields[$field] = $data;
2650                         }
2651                 }
2652
2653                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
2654
2655                 Logger::info('Update thread', ['item' => $itemid, 'guid' => $item["guid"], 'result' => $result]);
2656         }
2657
2658         private static function deleteThread($itemid, $uri_id)
2659         {
2660                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2661                 if (!DBA::isResult($item)) {
2662                         Logger::info('No thread found', ['id' => $itemid]);
2663                         return;
2664                 }
2665
2666                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
2667
2668                 Logger::info('Deleted thread', ['item' => $itemid, 'result' => $result]);
2669
2670                 $condition = ["`uri-id` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $uri_id, $item["uid"]];
2671                 if (!Post::exists($condition)) {
2672                         DBA::delete('item', ['uri-id' => $uri_id, 'uid' => 0]);
2673                         Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri-id' => $uri_id]);
2674                 }
2675         }
2676
2677         /**
2678          * Fetch the SQL condition for the given user id
2679          *
2680          * @param integer $owner_id User ID for which the permissions should be fetched
2681          * @return array condition
2682          */
2683         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2684         {
2685                 $local_user = local_user();
2686                 $remote_user = Session::getRemoteContactID($owner_id);
2687
2688                 // default permissions - anonymous user
2689                 $condition = ["`private` != ?", self::PRIVATE];
2690
2691                 if ($local_user && ($local_user == $owner_id)) {
2692                         // Profile owner - everything is visible
2693                         $condition = [];
2694                 } elseif ($remote_user) {
2695                          // Authenticated visitor - fetch the matching permissionsets
2696                         $set = PermissionSet::get($owner_id, $remote_user);
2697                         if (!empty($set)) {
2698                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2699                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2700                                         self::PRIVATE, self::PRIVATE];
2701                                 $condition = array_merge($condition, $set);
2702                         }
2703                 }
2704
2705                 return $condition;
2706         }
2707
2708         /**
2709          * Get a permission SQL string for the given user
2710          *
2711          * @param int $owner_id
2712          * @param string $table
2713          * @return string
2714          */
2715         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2716         {
2717                 $local_user = local_user();
2718                 $remote_user = Session::getRemoteContactID($owner_id);
2719
2720                 if (!empty($table)) {
2721                         $table = DBA::quoteIdentifier($table) . '.';
2722                 }
2723
2724                 /*
2725                  * Construct permissions
2726                  *
2727                  * default permissions - anonymous user
2728                  */
2729                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2730
2731                 // Profile owner - everything is visible
2732                 if ($local_user && ($local_user == $owner_id)) {
2733                         $sql = '';
2734                 } elseif ($remote_user) {
2735                         /*
2736                          * Authenticated visitor. Unless pre-verified,
2737                          * check that the contact belongs to this $owner_id
2738                          * and load the groups the visitor belongs to.
2739                          * If pre-verified, the caller is expected to have already
2740                          * done this and passed the groups into this function.
2741                          */
2742                         $set = PermissionSet::get($owner_id, $remote_user);
2743
2744                         if (!empty($set)) {
2745                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
2746                         } else {
2747                                 $sql_set = '';
2748                         }
2749
2750                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2751                 }
2752
2753                 return $sql;
2754         }
2755
2756         /**
2757          * get translated item type
2758          *
2759          * @param $item
2760          * @return string
2761          */
2762         public static function postType($item)
2763         {
2764                 if (!empty($item['event-id'])) {
2765                         return DI::l10n()->t('event');
2766                 } elseif (!empty($item['resource-id'])) {
2767                         return DI::l10n()->t('photo');
2768                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2769                         return DI::l10n()->t('activity');
2770                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2771                         return DI::l10n()->t('comment');
2772                 }
2773
2774                 return DI::l10n()->t('post');
2775         }
2776
2777         /**
2778          * Sets the "rendered-html" field of the provided item
2779          *
2780          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2781          *
2782          * @param array $item
2783          * @param bool  $update
2784          *
2785          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2786          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2787          */
2788         public static function putInCache(&$item, $update = false)
2789         {
2790                 // Save original body to prevent addons to modify it
2791                 $body = $item['body'];
2792
2793                 $rendered_hash = $item['rendered-hash'] ?? '';
2794                 $rendered_html = $item['rendered-html'] ?? '';
2795
2796                 if ($rendered_hash == ''
2797                         || $rendered_html == ''
2798                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2799                         || DI::config()->get('system', 'ignore_cache')
2800                 ) {
2801                         self::addRedirToImageTags($item);
2802
2803                         $item['rendered-html'] = BBCode::convert($item['body']);
2804                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2805
2806                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2807                         Hook::callAll('put_item_in_cache', $hook_data);
2808                         $item['rendered-html'] = $hook_data['rendered-html'];
2809                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2810                         unset($hook_data);
2811
2812                         // Force an update if the generated values differ from the existing ones
2813                         if ($rendered_hash != $item['rendered-hash']) {
2814                                 $update = true;
2815                         }
2816
2817                         // Only compare the HTML when we forcefully ignore the cache
2818                         if (DI::config()->get('system', 'ignore_cache') && ($rendered_html != $item['rendered-html'])) {
2819                                 $update = true;
2820                         }
2821
2822                         if ($update && !empty($item['id'])) {
2823                                 self::update(
2824                                         [
2825                                                 'rendered-html' => $item['rendered-html'],
2826                                                 'rendered-hash' => $item['rendered-hash']
2827                                         ],
2828                                         ['id' => $item['id']]
2829                                 );
2830                         }
2831                 }
2832
2833                 $item['body'] = $body;
2834         }
2835
2836         /**
2837          * Find any non-embedded images in private items and add redir links to them
2838          *
2839          * @param array &$item The field array of an item row
2840          */
2841         private static function addRedirToImageTags(array &$item)
2842         {
2843                 $app = DI::app();
2844
2845                 $matches = [];
2846                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2847                 if ($cnt) {
2848                         foreach ($matches as $mtch) {
2849                                 if (strpos($mtch[1], '/redir') !== false) {
2850                                         continue;
2851                                 }
2852
2853                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
2854                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2855                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2856                                 }
2857                         }
2858                 }
2859         }
2860
2861         /**
2862          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2863          * If attach is true, also add icons for item attachments.
2864          *
2865          * @param array   $item
2866          * @param boolean $attach
2867          * @param boolean $is_preview
2868          * @return string item body html
2869          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2870          * @throws \ImagickException
2871          * @hook  prepare_body_init item array before any work
2872          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2873          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2874          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2875          */
2876         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2877         {
2878                 $a = DI::app();
2879                 Hook::callAll('prepare_body_init', $item);
2880
2881                 // In order to provide theme developers more possibilities, event items
2882                 // are treated differently.
2883                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2884                         $ev = Event::getItemHTML($item);
2885                         return $ev;
2886                 }
2887
2888                 $tags = Tag::populateFromItem($item);
2889
2890                 $item['tags'] = $tags['tags'];
2891                 $item['hashtags'] = $tags['hashtags'];
2892                 $item['mentions'] = $tags['mentions'];
2893
2894                 // Compile eventual content filter reasons
2895                 $filter_reasons = [];
2896                 if (!$is_preview && public_contact() != $item['author-id']) {
2897                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2898                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2899                         }
2900
2901                         $hook_data = [
2902                                 'item' => $item,
2903                                 'filter_reasons' => $filter_reasons
2904                         ];
2905                         Hook::callAll('prepare_body_content_filter', $hook_data);
2906                         $filter_reasons = $hook_data['filter_reasons'];
2907                         unset($hook_data);
2908                 }
2909
2910                 // Update the cached values if there is no "zrl=..." on the links.
2911                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
2912
2913                 // Or update it if the current viewer is the intented viewer.
2914                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
2915                         $update = true;
2916                 }
2917
2918                 self::putInCache($item, $update);
2919                 $s = $item["rendered-html"];
2920
2921                 $hook_data = [
2922                         'item' => $item,
2923                         'html' => $s,
2924                         'preview' => $is_preview,
2925                         'filter_reasons' => $filter_reasons
2926                 ];
2927                 Hook::callAll('prepare_body', $hook_data);
2928                 $s = $hook_data['html'];
2929                 unset($hook_data);
2930
2931                 if (!$attach) {
2932                         // Replace the blockquotes with quotes that are used in mails.
2933                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2934                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2935                         return $s;
2936                 }
2937
2938                 $as = '';
2939                 $vhead = false;
2940                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT, Post\Media::TORRENT, Post\Media::UNKNOWN]) as $attachment) {
2941                         $mime = $attachment['mimetype'];
2942
2943                         $the_url = Contact::magicLinkById($item['author-id'], $attachment['url']);
2944
2945                         if (strpos($mime, 'video') !== false) {
2946                                 if (!$vhead) {
2947                                         $vhead = true;
2948                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
2949                                 }
2950
2951                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2952                                         '$video' => [
2953                                                 'id'     => $item['author-id'],
2954                                                 'title'  => DI::l10n()->t('View Video'),
2955                                                 'src'    => $the_url,
2956                                                 'mime'   => $mime,
2957                                         ],
2958                                 ]);
2959                         }
2960
2961                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
2962                         if ($filetype) {
2963                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
2964                                 $filesubtype = str_replace('.', '-', $filesubtype);
2965                         } else {
2966                                 $filetype = 'unkn';
2967                                 $filesubtype = 'unkn';
2968                         }
2969
2970                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
2971                         $title .= ' ' . ($attachment['size'] ?? 0) . ' ' . DI::l10n()->t('bytes');
2972
2973                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
2974                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
2975                 }
2976
2977                 if ($as != '') {
2978                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
2979                 }
2980
2981                 // Map.
2982                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2983                         $x = Map::byCoordinates(trim($item['coord']));
2984                         if ($x) {
2985                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2986                         }
2987                 }
2988
2989                 // Replace friendica image url size with theme preference.
2990                 if (!empty($a->theme_info['item_image_size'])) {
2991                         $ps = $a->theme_info['item_image_size'];
2992                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2993                 }
2994
2995                 $s = HTML::applyContentFilter($s, $filter_reasons);
2996
2997                 $hook_data = ['item' => $item, 'html' => $s];
2998                 Hook::callAll('prepare_body_final', $hook_data);
2999
3000                 return $hook_data['html'];
3001         }
3002
3003         /**
3004          * get private link for item
3005          *
3006          * @param array $item
3007          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3008          * @throws \Exception
3009          */
3010         public static function getPlink($item)
3011         {
3012                 if (local_user()) {
3013                         $ret = [
3014                                 'href' => "display/" . $item['guid'],
3015                                 'orig' => "display/" . $item['guid'],
3016                                 'title' => DI::l10n()->t('View on separate page'),
3017                                 'orig_title' => DI::l10n()->t('view on separate page'),
3018                         ];
3019
3020                         if (!empty($item['plink'])) {
3021                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3022                                 $ret["title"] = DI::l10n()->t('link to source');
3023                         }
3024                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3025                         $ret = [
3026                                 'href' => $item['plink'],
3027                                 'orig' => $item['plink'],
3028                                 'title' => DI::l10n()->t('link to source'),
3029                         ];
3030                 } else {
3031                         $ret = [];
3032                 }
3033
3034                 return $ret;
3035         }
3036
3037         /**
3038          * Is the given item array a post that is sent as starting post to a forum?
3039          *
3040          * @param array $item
3041          * @param array $owner
3042          *
3043          * @return boolean "true" when it is a forum post
3044          */
3045         public static function isForumPost(array $item, array $owner = [])
3046         {
3047                 if (empty($owner)) {
3048                         $owner = User::getOwnerDataById($item['uid']);
3049                         if (empty($owner)) {
3050                                 return false;
3051                         }
3052                 }
3053
3054                 if (($item['author-id'] == $item['owner-id']) ||
3055                         ($owner['id'] == $item['contact-id']) ||
3056                         ($item['uri-id'] != $item['parent-uri-id']) ||
3057                         $item['origin']) {
3058                         return false;
3059                 }
3060
3061                 return Contact::isForum($item['contact-id']);
3062         }
3063
3064         /**
3065          * Search item id for given URI or plink
3066          *
3067          * @param string $uri
3068          * @param integer $uid
3069          *
3070          * @return integer item id
3071          */
3072         public static function searchByLink($uri, $uid = 0)
3073         {
3074                 $ssl_uri = str_replace('http://', 'https://', $uri);
3075                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3076
3077                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3078                 if (DBA::isResult($item)) {
3079                         return $item['id'];
3080                 }
3081
3082                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3083                 if (DBA::isResult($item)) {
3084                         return $item['id'];
3085                 }
3086
3087                 return 0;
3088         }
3089
3090         /**
3091          * Return the URI for a link to the post
3092          *
3093          * @param string $uri URI or link to post
3094          *
3095          * @return string URI
3096          */
3097         public static function getURIByLink(string $uri)
3098         {
3099                 $ssl_uri = str_replace('http://', 'https://', $uri);
3100                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3101
3102                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3103                 if (DBA::isResult($item)) {
3104                         return $item['uri'];
3105                 }
3106
3107                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3108                 if (DBA::isResult($item)) {
3109                         return $item['uri'];
3110                 }
3111
3112                 return '';
3113         }
3114
3115         /**
3116          * Fetches item for given URI or plink
3117          *
3118          * @param string $uri
3119          * @param integer $uid
3120          *
3121          * @return integer item id
3122          */
3123         public static function fetchByLink(string $uri, int $uid = 0)
3124         {
3125                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3126                 $item_id = self::searchByLink($uri, $uid);
3127                 if (!empty($item_id)) {
3128                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3129                         return $item_id;
3130                 }
3131
3132                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3133                         $item_id = self::searchByLink($fetched_uri, $uid);
3134                 } else {
3135                         $item_id = Diaspora::fetchByURL($uri);
3136                 }
3137
3138                 if (!empty($item_id)) {
3139                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3140                         return $item_id;
3141                 }
3142
3143                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3144                 return 0;
3145         }
3146
3147         /**
3148          * Return share data from an item array (if the item is shared item)
3149          * We are providing the complete Item array, because at some time in the future
3150          * we hopefully will define these values not in the body anymore but in some item fields.
3151          * This function is meant to replace all similar functions in the system.
3152          *
3153          * @param array $item
3154          *
3155          * @return array with share information
3156          */
3157         public static function getShareArray($item)
3158         {
3159                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3160                         return [];
3161                 }
3162
3163                 $attribute_string = $matches[2];
3164                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3165                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3166                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3167                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3168                         }
3169                 }
3170                 return $attributes;
3171         }
3172
3173         /**
3174          * Fetch item information for shared items from the original items and adds it.
3175          *
3176          * @param array $item
3177          *
3178          * @return array item array with data from the original item
3179          */
3180         public static function addShareDataFromOriginal(array $item)
3181         {
3182                 $shared = self::getShareArray($item);
3183                 if (empty($shared)) {
3184                         return $item;
3185                 }
3186
3187                 // Real reshares always have got a GUID.
3188                 if (empty($shared['guid'])) {
3189                         return $item;
3190                 }
3191
3192                 $uid = $item['uid'] ?? 0;
3193
3194                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3195                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3196                 if (!DBA::isResult($shared_item)) {
3197                         if (empty($shared['link'])) {
3198                                 return $item;
3199                         }
3200
3201                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3202                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3203                         if (empty($id)) {
3204                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3205                                 return $item;
3206                         }
3207
3208                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3209                         if (!DBA::isResult($shared_item)) {
3210                                 return $item;
3211                         }
3212                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3213                 } else {
3214                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3215                 }
3216
3217                 if (!empty($shared_item['title'])) {
3218                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3219                         unset($shared_item['title']);
3220                 } else {
3221                         $body = $shared_item['body'];
3222                 }
3223
3224                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3225                 unset($shared_item['body']);
3226
3227                 return array_merge($item, $shared_item);
3228         }
3229
3230         /**
3231          * Check a prospective item array against user-level permissions
3232          *
3233          * @param array $item Expected keys: uri, gravity, and
3234          *                    author-link if is author-id is set,
3235          *                    owner-link if is owner-id is set,
3236          *                    causer-link if is causer-id is set.
3237          * @param int   $user_id Local user ID
3238          * @return bool
3239          * @throws \Exception
3240          */
3241         protected static function isAllowedByUser(array $item, int $user_id)
3242         {
3243                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3244                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3245                         return false;
3246                 }
3247
3248                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3249                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3250                         return false;
3251                 }
3252
3253                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3254                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3255                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3256                         return false;
3257                 }
3258
3259                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3260                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3261                         return false;
3262                 }
3263
3264                 return true;
3265         }
3266 }