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