src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Model\Tag;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\DI;
  36 use Friendica\Model\Post;
  37 use Friendica\Protocol\Activity;
  38 use Friendica\Protocol\ActivityPub;
  39 use Friendica\Protocol\Diaspora;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Map;
  42 use Friendica\Util\Network;
  43 use Friendica\Util\Proxy;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use LanguageDetection\Language;
  47
  48 class Item
  49 {
  50         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  51         const PT_ARTICLE = 0;
  52         const PT_NOTE = 1;
  53         const PT_PAGE = 2;
  54         const PT_IMAGE = 16;
  55         const PT_AUDIO = 17;
  56         const PT_VIDEO = 18;
  57         const PT_DOCUMENT = 19;
  58         const PT_EVENT = 32;
  59         const PT_PERSONAL_NOTE = 128;
  60
  61         // Posting reasons (Why had a post been stored for a user?)
  62         const PR_NONE = 0;
  63         const PR_TAG = 64;
  64         const PR_TO = 65;
  65         const PR_CC = 66;
  66         const PR_BTO = 67;
  67         const PR_BCC = 68;
  68         const PR_FOLLOWER = 69;
  69         const PR_ANNOUNCEMENT = 70;
  70         const PR_COMMENT = 71;
  71         const PR_STORED = 72;
  72         const PR_GLOBAL = 73;
  73         const PR_RELAY = 74;
  74         const PR_FETCHED = 75;
  75
  76         // Field list that is used to display the items
  77         const DISPLAY_FIELDLIST = [
  78                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  79                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri',
  80                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  81                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  82                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  83                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention',
  84                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  85                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type',
  86                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  87                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  88                 'writable', 'self', 'cid', 'alias',
  89                 'event-created', 'event-edited', 'event-start', 'event-finish',
  90                 'event-summary', 'event-desc', 'event-location', 'event-type',
  91                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  92                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  93         ];
  94
  95         // Field list that is used to deliver items via the protocols
  96         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  97                         'parent-guid', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  98                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
  99                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 100                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 101                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 102                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'forum_mode', 'origin',
 103                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 104                         'event-created', 'event-edited', 'event-start', 'event-finish',
 105                         'event-summary', 'event-desc', 'event-location', 'event-type',
 106                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
 107
 108         // All fields in the item table
 109         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 110                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 111                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 112                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 113                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 114                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 115                         'private', 'pubmail', 'visible', 'starred',
 116                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 117                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 118                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 119                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 120                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 121
 122         // List of all verbs that don't need additional content data.
 123         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 124         const ACTIVITIES = [
 125                 Activity::LIKE, Activity::DISLIKE,
 126                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 127                 Activity::FOLLOW,
 128                 Activity::ANNOUNCE];
 129
 130         const PUBLIC = 0;
 131         const PRIVATE = 1;
 132         const UNLISTED = 2;
 133
 134         /**
 135          * Update existing item entries
 136          *
 137          * @param array $fields    The fields that are to be changed
 138          * @param array $condition The condition for finding the item entries
 139          *
 140          * In the future we may have to change permissions as well.
 141          * Then we had to add the user id as third parameter.
 142          *
 143          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 144          *
 145          * @return integer|boolean number of affected rows - or "false" if there was an error
 146          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 147          */
 148         public static function update(array $fields, array $condition)
 149         {
 150                 if (empty($condition) || empty($fields)) {
 151                         return false;
 152                 }
 153
 154                 if (isset($fields['extid'])) {
 155                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 156                 }
 157
 158                 if (!empty($fields['verb'])) {
 159                         $fields['vid'] = Verb::getID($fields['verb']);
 160                 }
 161
 162                 $rows = Post::update($fields, $condition);
 163                 if (is_bool($rows)) {
 164                         return $rows;
 165                 }
 166
 167                 // We only need to call the line by line update for specific fields
 168                 if (empty($fields['body']) && empty($fields['file']) &&
 169                         empty($fields['attach']) && empty($fields['edited'])) {
 170                         return $rows;
 171                 }
 172
 173                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 174
 175                 $items = Post::select(['id', 'origin', 'uri-id', 'uid'], $condition);
 176
 177                 $notify_items = [];
 178
 179                 while ($item = DBA::fetch($items)) {
 180                         if (!empty($fields['body'])) {
 181                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 182
 183                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 184
 185                                 // Remove all media attachments from the body and store them in the post-media table
 186                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 187                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 188                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 189                         }
 190
 191                         if (!empty($fields['file'])) {
 192                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 193                         }
 194
 195                         if (!empty($fields['attach'])) {
 196                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 197                         }
 198
 199                         // We only need to notfiy others when it is an original entry from us.
 200                         // Only call the notifier when the item has some content relevant change.
 201                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 202                                 $notify_items[] = $item['id'];
 203                         }
 204                 }
 205
 206                 DBA::close($items);
 207
 208                 foreach ($notify_items as $notify_item) {
 209                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 210                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 211                 }
 212
 213                 return $rows;
 214         }
 215
 216         /**
 217          * Delete an item and notify others about it - if it was ours
 218          *
 219          * @param array   $condition The condition for finding the item entries
 220          * @param integer $priority  Priority for the notification
 221          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 222          */
 223         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 224         {
 225                 $items = Post::select(['id'], $condition);
 226                 while ($item = Post::fetch($items)) {
 227                         self::markForDeletionById($item['id'], $priority);
 228                 }
 229                 DBA::close($items);
 230         }
 231
 232         /**
 233          * Delete an item for an user and notify others about it - if it was ours
 234          *
 235          * @param array   $condition The condition for finding the item entries
 236          * @param integer $uid       User who wants to delete this item
 237          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 238          */
 239         public static function deleteForUser($condition, $uid)
 240         {
 241                 if ($uid == 0) {
 242                         return;
 243                 }
 244
 245                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 246                 while ($item = Post::fetch($items)) {
 247                         if (in_array($item['uid'], [$uid, 0])) {
 248                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 249                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 250                         }
 251
 252                         if ($item['uid'] == $uid) {
 253                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 254                         } elseif ($item['uid'] != 0) {
 255                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 256                         }
 257                 }
 258                 DBA::close($items);
 259         }
 260
 261         /**
 262          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 263          *
 264          * @param integer $item_id
 265          * @param integer $priority Priority for the notification
 266          *
 267          * @return boolean success
 268          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 269          */
 270         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 271         {
 272                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 273                 // locate item to be deleted
 274                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 275                         'deleted', 'resource-id', 'event-id',
 276                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 277                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 278                 if (!DBA::isResult($item)) {
 279                         Logger::info('Item not found.', ['id' => $item_id]);
 280                         return false;
 281                 }
 282
 283                 if ($item['deleted']) {
 284                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 285                         return false;
 286                 }
 287
 288                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 289                 if (!DBA::isResult($parent)) {
 290                         $parent = ['origin' => false];
 291                 }
 292
 293                 // clean up categories and tags so they don't end up as orphans
 294                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 295
 296                 /*
 297                  * If item is a link to a photo resource, nuke all the associated photos
 298                  * (visitors will not have photo resources)
 299                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 300                  * generate a resource-id and therefore aren't intimately linked to the item.
 301                  */
 302                 /// @TODO: this should first check if photo is used elsewhere
 303                 if (strlen($item['resource-id'])) {
 304                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 305                 }
 306
 307                 // If item is a link to an event, delete the event.
 308                 if (intval($item['event-id'])) {
 309                         Event::delete($item['event-id']);
 310                 }
 311
 312                 // If item has attachments, drop them
 313                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 314                 foreach($attachments as $attachment) {
 315                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 316                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 317                         }
 318                 }
 319
 320                 // Set the item to "deleted"
 321                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 322                 Post::update($item_fields, ['id' => $item['id']]);
 323
 324                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 325
 326                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 327                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 328                 }
 329
 330                 Post\DeliveryData::delete($item['uri-id']);
 331
 332                 // If it's the parent of a comment thread, kill all the kids
 333                 if ($item['gravity'] == GRAVITY_PARENT) {
 334                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 335                 }
 336
 337                 // Is it our comment and/or our thread?
 338                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 339                         // When we delete the original post we will delete all existing copies on the server as well
 340                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 341
 342                         // send the notification upstream/downstream
 343                         if ($priority) {
 344                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 345                         }
 346                 } elseif ($item['uid'] != 0) {
 347                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 348                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 349                 }
 350
 351                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 352
 353                 return true;
 354         }
 355
 356         private static function guid($item, $notify)
 357         {
 358                 if (!empty($item['guid'])) {
 359                         return Strings::escapeTags(trim($item['guid']));
 360                 }
 361
 362                 if ($notify) {
 363                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 364                         // We add the hash of our own host because our host is the original creator of the post.
 365                         $prefix_host = DI::baseUrl()->getHostname();
 366                 } else {
 367                         $prefix_host = '';
 368
 369                         // We are only storing the post so we create a GUID from the original hostname.
 370                         if (!empty($item['author-link'])) {
 371                                 $parsed = parse_url($item['author-link']);
 372                                 if (!empty($parsed['host'])) {
 373                                         $prefix_host = $parsed['host'];
 374                                 }
 375                         }
 376
 377                         if (empty($prefix_host) && !empty($item['plink'])) {
 378                                 $parsed = parse_url($item['plink']);
 379                                 if (!empty($parsed['host'])) {
 380                                         $prefix_host = $parsed['host'];
 381                                 }
 382                         }
 383
 384                         if (empty($prefix_host) && !empty($item['uri'])) {
 385                                 $parsed = parse_url($item['uri']);
 386                                 if (!empty($parsed['host'])) {
 387                                         $prefix_host = $parsed['host'];
 388                                 }
 389                         }
 390
 391                         // Is it in the format data@host.tld? - Used for mail contacts
 392                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 393                                 $mailparts = explode('@', $item['author-link']);
 394                                 $prefix_host = array_pop($mailparts);
 395                         }
 396                 }
 397
 398                 if (!empty($item['plink'])) {
 399                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 400                 } elseif (!empty($item['uri'])) {
 401                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 402                 } else {
 403                         $guid = System::createUUID(hash('crc32', $prefix_host));
 404                 }
 405
 406                 return $guid;
 407         }
 408
 409         private static function contactId($item)
 410         {
 411                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 412                         return $item['contact-id'];
 413                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 414                         return $item['contact-id'];
 415                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 416                         return $item['author-id'];
 417                 } elseif (!empty($item['contact-id'])) {
 418                         return $item['contact-id'];
 419                 } else {
 420                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 421                         if (!empty($contact_id)) {
 422                                 return $contact_id;
 423                         }
 424                 }
 425                 return $item['author-id'];
 426         }
 427
 428         /**
 429          * Write an item array into a spool file to be inserted later.
 430          * This command is called whenever there are issues storing an item.
 431          *
 432          * @param array $item The item fields that are to be inserted
 433          * @throws \Exception
 434          */
 435         private static function spool($orig_item)
 436         {
 437                 // Now we store the data in the spool directory
 438                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 439                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 440
 441                 $spoolpath = get_spoolpath();
 442                 if ($spoolpath != "") {
 443                         $spool = $spoolpath . '/' . $file;
 444
 445                         file_put_contents($spool, json_encode($orig_item));
 446                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 447                 }
 448         }
 449
 450         /**
 451          * Check if the item array is a duplicate
 452          *
 453          * @param array $item
 454          * @return boolean is it a duplicate?
 455          */
 456         private static function isDuplicate(array $item)
 457         {
 458                 // Checking if there is already an item with the same guid
 459                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 460                 if (Post::exists($condition)) {
 461                         Logger::notice('Found already existing item', [
 462                                 'guid' => $item['guid'],
 463                                 'uid' => $item['uid'],
 464                                 'network' => $item['network']
 465                         ]);
 466                         return true;
 467                 }
 468
 469                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 470                         'network' => [$item['network'], Protocol::DFRN]];
 471                 if (Post::exists($condition)) {
 472                         Logger::notice('duplicated item with the same uri found.', $item);
 473                         return true;
 474                 }
 475
 476                 // On Friendica and Diaspora the GUID is unique
 477                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 478                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 479                         if (Post::exists($condition)) {
 480                                 Logger::notice('duplicated item with the same guid found.', $item);
 481                                 return true;
 482                         }
 483                 } elseif ($item['network'] == Protocol::OSTATUS) {
 484                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 485                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 486                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 487                         if (Post::exists($condition)) {
 488                                 Logger::notice('duplicated item with the same body found.', $item);
 489                                 return true;
 490                         }
 491                 }
 492
 493                 /*
 494                  * Check for already added items.
 495                  * There is a timing issue here that sometimes creates double postings.
 496                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 497                  */
 498                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 499                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 500                         return true;
 501                 }
 502
 503                 return false;
 504         }
 505
 506         /**
 507          * Check if the item array is valid
 508          *
 509          * @param array $item
 510          * @return boolean item is valid
 511          */
 512         public static function isValid(array $item)
 513         {
 514                 // When there is no content then we don't post it
 515                 if (($item['body'] . $item['title'] == '') && !Post\Media::existsByURIId($item['uri-id'])) {
 516                         Logger::notice('No body, no title.');
 517                         return false;
 518                 }
 519
 520                 if (!empty($item['uid'])) {
 521                         $owner = User::getOwnerDataById($item['uid'], false);
 522                         if (!$owner) {
 523                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 524                                 return false;
 525                         }
 526
 527                         if ($owner['account_expired'] || $owner['account_removed']) {
 528                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 529                                 return false;
 530                         }
 531                 }
 532
 533                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 534                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 535                         return false;
 536                 }
 537
 538                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 539                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 540                         return false;
 541                 }
 542
 543                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 544                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 545                         return false;
 546                 }
 547
 548                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 549                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 550                         return false;
 551                 }
 552
 553                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 554                         return false;
 555                 }
 556
 557                 if ($item['verb'] == Activity::FOLLOW) {
 558                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 559                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 560                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 561                                 return false;
 562                         }
 563
 564                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 565                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 566                         if (Post::exists($condition)) {
 567                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 568                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 569                                 return false;
 570                         }
 571                 }
 572
 573                 return true;
 574         }
 575
 576         /**
 577          * Check if the item array is too old
 578          *
 579          * @param array $item
 580          * @return boolean item is too old
 581          */
 582         public static function isTooOld(array $item)
 583         {
 584                 // check for create date and expire time
 585                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 586
 587                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 588                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 589                         $expire_interval = $user['expire'];
 590                 }
 591
 592                 if (($expire_interval > 0) && !empty($item['created'])) {
 593                         $expire_date = time() - ($expire_interval * 86400);
 594                         $created_date = strtotime($item['created']);
 595                         if ($created_date < $expire_date) {
 596                                 Logger::notice('Item created before expiration interval.', [
 597                                         'created' => date('c', $created_date),
 598                                         'expired' => date('c', $expire_date),
 599                                         '$item' => $item
 600                                 ]);
 601                                 return true;
 602                         }
 603                 }
 604
 605                 return false;
 606         }
 607
 608         /**
 609          * Return the id of the given item array if it has been stored before
 610          *
 611          * @param array $item
 612          * @return integer item id
 613          */
 614         private static function getDuplicateID(array $item)
 615         {
 616                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 617                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 618                                 $item['uri-id'], $item['uid'],
 619                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 620                         $existing = Post::selectFirst(['id', 'network'], $condition);
 621                         if (DBA::isResult($existing)) {
 622                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 623                                 if ($item['uid'] != 0) {
 624                                         Logger::notice('Item already existed for user', [
 625                                                 'uri-id' => $item['uri-id'],
 626                                                 'uid' => $item['uid'],
 627                                                 'network' => $item['network'],
 628                                                 'existing_id' => $existing["id"],
 629                                                 'existing_network' => $existing["network"]
 630                                         ]);
 631                                 }
 632
 633                                 return $existing["id"];
 634                         }
 635                 }
 636                 return 0;
 637         }
 638
 639         /**
 640          * Fetch top-level parent data for the given item array
 641          *
 642          * @param array $item
 643          * @return array item array with parent data
 644          * @throws \Exception
 645          */
 646         private static function getTopLevelParent(array $item)
 647         {
 648                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 649                         'uri-id', 'parent-uri-id',
 650                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 651                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
 652                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 653                 $params = ['order' => ['id' => false]];
 654                 $parent = Post::selectFirst($fields, $condition, $params);
 655
 656                 if (!DBA::isResult($parent)) {
 657                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 658                         return [];
 659                 }
 660
 661                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 662                         return $parent;
 663                 }
 664
 665                 $condition = ['uri-id' => $parent['parent-uri-id'],
 666                         'parent-uri-id' => $parent['parent-uri-id'],
 667                         'uid' => $parent['uid']];
 668                 $params = ['order' => ['id' => false]];
 669                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 670                 if (!DBA::isResult($toplevel_parent)) {
 671                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 672                         return [];
 673                 }
 674
 675                 return $toplevel_parent;
 676         }
 677
 678         /**
 679          * Get the gravity for the given item array
 680          *
 681          * @param array $item
 682          * @return integer gravity
 683          */
 684         private static function getGravity(array $item)
 685         {
 686                 $activity = DI::activity();
 687
 688                 if (isset($item['gravity'])) {
 689                         return intval($item['gravity']);
 690                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 691                         return GRAVITY_PARENT;
 692                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 693                         return GRAVITY_COMMENT;
 694                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 695                         return GRAVITY_ACTIVITY;
 696                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 697                         return GRAVITY_ACTIVITY;
 698                 }
 699                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 700                 return GRAVITY_UNKNOWN;   // Should not happen
 701         }
 702
 703         public static function insert($item, $notify = false, $dontcache = false)
 704         {
 705                 $orig_item = $item;
 706
 707                 $priority = PRIORITY_HIGH;
 708
 709                 // If it is a posting where users should get notifications, then define it as wall posting
 710                 if ($notify) {
 711                         $item['wall'] = 1;
 712                         $item['origin'] = 1;
 713                         $item['network'] = Protocol::DFRN;
 714                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 715                         $item['direction'] = Conversation::PUSH;
 716
 717                         if (in_array($notify, PRIORITIES)) {
 718                                 $priority = $notify;
 719                         }
 720                 } else {
 721                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 722                 }
 723
 724                 $uid = intval($item['uid']);
 725
 726                 $item['guid'] = self::guid($item, $notify);
 727                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 728
 729                 // Store URI data
 730                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 731
 732                 // Backward compatibility: parent-uri used to be the direct parent uri.
 733                 // If it is provided without a thr-parent, it probably is the old behavior.
 734                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 735                 $item['parent-uri'] = $item['thr-parent'];
 736
 737                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 738
 739                 // Store conversation data
 740                 $item = Conversation::insert($item);
 741
 742                 /*
 743                  * Do we already have this item?
 744                  * We have to check several networks since Friendica posts could be repeated
 745                  * via OStatus (maybe Diasporsa as well)
 746                  */
 747                 $duplicate = self::getDuplicateID($item);
 748                 if ($duplicate) {
 749                         return $duplicate;
 750                 }
 751
 752                 // Additional duplicate checks
 753                 /// @todo Check why the first duplication check returns the item number and the second a 0
 754                 if (self::isDuplicate($item)) {
 755                         return 0;
 756                 }
 757
 758                 if (!isset($item['post-type'])) {
 759                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 760                 }
 761
 762                 $item['wall']          = intval($item['wall'] ?? 0);
 763                 $item['extid']         = trim($item['extid'] ?? '');
 764                 $item['author-name']   = trim($item['author-name'] ?? '');
 765                 $item['author-link']   = trim($item['author-link'] ?? '');
 766                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 767                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 768                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 769                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 770                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 771                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 772                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 773                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 774                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 775                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 776                 $item['location']      = trim($item['location'] ?? '');
 777                 $item['coord']         = trim($item['coord'] ?? '');
 778                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 779                 $item['deleted']       = 0;
 780                 $item['verb']          = trim($item['verb'] ?? '');
 781                 $item['object-type']   = trim($item['object-type'] ?? '');
 782                 $item['object']        = trim($item['object'] ?? '');
 783                 $item['target-type']   = trim($item['target-type'] ?? '');
 784                 $item['target']        = trim($item['target'] ?? '');
 785                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 786                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 787                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 788                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 789                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 790                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 791                 $item['body']          = trim($item['body'] ?? '');
 792                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 793                 $item['app']           = trim($item['app'] ?? '');
 794                 $item['origin']        = intval($item['origin'] ?? 0);
 795                 $item['postopts']      = trim($item['postopts'] ?? '');
 796                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 797                 $item['event-id']      = intval($item['event-id'] ?? 0);
 798                 $item['inform']        = trim($item['inform'] ?? '');
 799                 $item['file']          = trim($item['file'] ?? '');
 800
 801                 // Items cannot be stored before they happen ...
 802                 if ($item['created'] > DateTimeFormat::utcNow()) {
 803                         $item['created'] = DateTimeFormat::utcNow();
 804                 }
 805
 806                 // We haven't invented time travel by now.
 807                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 808                         $item['edited'] = DateTimeFormat::utcNow();
 809                 }
 810
 811                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 812
 813                 $item['gravity'] = self::getGravity($item);
 814
 815                 $item['language'] = self::getLanguage($item);
 816
 817                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 818                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 819                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 820
 821                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 822                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 823                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 824
 825                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 826                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 827                         $item['post-reason'] = self::PR_FOLLOWER;
 828                 }
 829
 830                 // Ensure that there is an avatar cache
 831                 Contact::checkAvatarCache($item['author-id']);
 832                 Contact::checkAvatarCache($item['owner-id']);
 833
 834                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 835                 $item["contact-id"] = self::contactId($item);
 836
 837                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 838                         self::isTooOld($item)) {
 839                         Logger::info('Item is too old', ['item' => $item]);
 840                         return 0;
 841                 }
 842
 843                 if (!self::isValid($item)) {
 844                         return 0;
 845                 }
 846
 847                 if ($item['gravity'] !== GRAVITY_PARENT) {
 848                         $toplevel_parent = self::getTopLevelParent($item);
 849                         if (empty($toplevel_parent)) {
 850                                 return 0;
 851                         }
 852
 853                         // If the thread originated from this node, we check the permission against the thread starter
 854                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 855                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 856                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 857                                 return 0;
 858                         }
 859
 860                         $parent_id             = $toplevel_parent['id'];
 861                         $item['parent-uri']    = $toplevel_parent['uri'];
 862                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 863                         $item['deleted']       = $toplevel_parent['deleted'];
 864                         $item['allow_cid']     = $toplevel_parent['allow_cid'];
 865                         $item['allow_gid']     = $toplevel_parent['allow_gid'];
 866                         $item['deny_cid']      = $toplevel_parent['deny_cid'];
 867                         $item['deny_gid']      = $toplevel_parent['deny_gid'];
 868                         $parent_origin         = $toplevel_parent['origin'];
 869
 870                         // Don't federate received participation messages
 871                         if ($item['verb'] != Activity::FOLLOW) {
 872                                 $item['wall'] = $toplevel_parent['wall'];
 873                         } else {
 874                                 $item['wall'] = false;
 875                                 // Participations are technical messages, so they are set to "seen" automatically
 876                                 $item['unseen'] = false;
 877                         }
 878
 879                         /*
 880                          * If the parent is private, force privacy for the entire conversation
 881                          * This differs from the above settings as it subtly allows comments from
 882                          * email correspondents to be private even if the overall thread is not.
 883                          */
 884                         if ($toplevel_parent['private']) {
 885                                 $item['private'] = $toplevel_parent['private'];
 886                         }
 887
 888                         /*
 889                          * Edge case. We host a public forum that was originally posted to privately.
 890                          * The original author commented, but as this is a comment, the permissions
 891                          * weren't fixed up so it will still show the comment as private unless we fix it here.
 892                          */
 893                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
 894                                 $item['private'] = self::PUBLIC;
 895                         }
 896
 897                         // If its a post that originated here then tag the thread as "mention"
 898                         if ($item['origin'] && $item['uid']) {
 899                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 900                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 901                         }
 902
 903                         // Update the contact relations
 904                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 905                 } else {
 906                         $parent_id = 0;
 907                         $parent_origin = $item['origin'];
 908                 }
 909
 910                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 911                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 912
 913                 // Is this item available in the global items (with uid=0)?
 914                 if ($item["uid"] == 0) {
 915                         $item["global"] = true;
 916
 917                         // Set the global flag on all items if this was a global item entry
 918                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 919                 } else {
 920                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 921                 }
 922
 923                 // ACL settings
 924                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 925                         $item["private"] = self::PRIVATE;
 926                 }
 927
 928                 if ($notify) {
 929                         $item['edit'] = false;
 930                         $item['parent'] = $parent_id;
 931                         Hook::callAll('post_local', $item);
 932                 } else {
 933                         Hook::callAll('post_remote', $item);
 934                 }
 935
 936                 if (!empty($item['cancel'])) {
 937                         Logger::log('post cancelled by addon.');
 938                         return 0;
 939                 }
 940
 941                 if (empty($item['vid']) && !empty($item['verb'])) {
 942                         $item['vid'] = Verb::getID($item['verb']);
 943                 }
 944
 945                 // Creates or assigns the permission set
 946                 $item['psid'] = PermissionSet::getIdFromACL(
 947                         $item['uid'],
 948                         $item['allow_cid'],
 949                         $item['allow_gid'],
 950                         $item['deny_cid'],
 951                         $item['deny_gid']
 952                 );
 953
 954                 if (!empty($item['extid'])) {
 955                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
 956                 }
 957
 958                 if ($item['verb'] == Activity::ANNOUNCE) {
 959                         self::setOwnerforResharedItem($item);
 960                 }
 961
 962                 if (isset($item['attachments'])) {
 963                         foreach ($item['attachments'] as $attachment) {
 964                                 $attachment['uri-id'] = $item['uri-id'];
 965                                 Post\Media::insert($attachment);
 966                         }
 967                         unset($item['attachments']);
 968                 }
 969
 970                 // Remove all media attachments from the body and store them in the post-media table
 971                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
 972                 $item['raw-body'] = self::setHashtags($item['raw-body']);
 973
 974                 // Check for hashtags in the body and repair or add hashtag links
 975                 $item['body'] = self::setHashtags($item['body']);
 976
 977                 // Fill the cache field
 978                 self::putInCache($item);
 979
 980                 if (stristr($item['verb'], Activity::POKE)) {
 981                         $notify_type = Delivery::POKE;
 982                 } else {
 983                         $notify_type = Delivery::POST;
 984                 }
 985
 986                 // Filling item related side tables
 987                 if (!empty($item['attach'])) {
 988                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
 989                 }
 990
 991                 if (empty($item['event-id'])) {
 992                         unset($item['event-id']);
 993                 }
 994
 995                 if (empty($item['causer-id'])) {
 996                         unset($item['causer-id']);
 997                 }
 998
 999                 Post::insert($item['uri-id'], $item);
1000
1001                 if ($item['gravity'] == GRAVITY_PARENT) {
1002                         Post\Thread::insert($item['uri-id'], $item);
1003                 }
1004
1005                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1006                         Post\Content::insert($item['uri-id'], $item);
1007                 }
1008
1009                 // Diaspora signature
1010                 if (!empty($item['diaspora_signed_text'])) {
1011                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1012                 }
1013
1014                 // Attached file links
1015                 if (!empty($item['file'])) {
1016                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1017                 }
1018
1019                 // Delivery relevant data
1020                 $delivery_data = Post\DeliveryData::extractFields($item);
1021
1022                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1023                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1024                 }
1025
1026                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1027                 if (!Tag::existsForPost($item['uri-id'])) {
1028                         Tag::storeFromBody($item['uri-id'], $item['body']);
1029                 }
1030
1031                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1032                 if (Post::exists($condition)) {
1033                         Logger::notice('Item is already inserted - aborting', $condition);
1034                         return 0;
1035                 }
1036
1037                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1038                 if (!$post_user_id) {
1039                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1040                         return 0;
1041                 }
1042
1043                 if ($item['gravity'] == GRAVITY_PARENT) {
1044                         $item['post-user-id'] = $post_user_id;
1045                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1046                 }
1047
1048                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1049
1050                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1051                 if (!DBA::isResult($posted_item)) {
1052                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1053                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1054                         self::spool($orig_item);
1055                         return 0;
1056                 }
1057
1058                 // update the commented timestamp on the parent
1059                 if (DI::config()->get('system', 'like_no_comment')) {
1060                         // Update when it is a comment
1061                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1062                 } else {
1063                         // Update when it isn't a follow or tag verb
1064                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1065                 }
1066
1067                 if ($update_commented) {
1068                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1069                 } else {
1070                         $fields = ['changed' => DateTimeFormat::utcNow()];
1071                 }
1072
1073                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1074
1075                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1076                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1077                         // Get the user information for the logging
1078                         $user = User::getById($uid);
1079
1080                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1081                         return 0;
1082                 }
1083
1084                 if (!$dontcache) {
1085                         if ($notify) {
1086                                 Hook::callAll('post_local_end', $posted_item);
1087                         } else {
1088                                 Hook::callAll('post_remote_end', $posted_item);
1089                         }
1090                 }
1091
1092                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1093                         self::addShadow($post_user_id);
1094                 } else {
1095                         self::addShadowPost($post_user_id);
1096                 }
1097
1098                 self::updateContact($posted_item);
1099
1100                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1101
1102                 check_user_notification($posted_item['uri-id'], $posted_item['uid']);
1103
1104                 // Distribute items to users who subscribed to their tags
1105                 self::distributeByTags($posted_item);
1106
1107                 // Automatically reshare the item if the "remote_self" option is selected
1108                 self::autoReshare($posted_item);
1109
1110                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1111
1112                 if ($transmit) {
1113                         // Don't relay participation messages
1114                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1115                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1116                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1117                                 $transmit = false;
1118                         }
1119                 }
1120
1121                 if ($transmit) {
1122                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1123                 }
1124
1125                 return $post_user_id;
1126         }
1127
1128         /**
1129          * Change the owner of a parent item if it had been shared by a forum
1130          *
1131          * (public) forum posts in the new format consist of the regular post by the author
1132          * followed by an announce message sent from the forum account.
1133          * Changing the owner helps in grouping forum posts.
1134          *
1135          * @param array $item
1136          * @return void
1137          */
1138         private static function setOwnerforResharedItem(array $item)
1139         {
1140                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1141                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1142                 if (!DBA::isResult($parent)) {
1143                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1144                         return;
1145                 }
1146
1147                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1148                 if (!DBA::isResult($author)) {
1149                         Logger::error('Author not found', ['id' => $item['author-id']]);
1150                         return;
1151                 }
1152
1153                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1154                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1155                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1156                         return;
1157                 }
1158
1159                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1160                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1161                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1162                                 return;
1163                         }
1164
1165                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1166                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1167                                 return;
1168                         }
1169                         self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1170                         Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1171                         return;
1172                 }
1173
1174                 self::update(['owner-id' => $item['author-id'], 'contact-id' => $cid], ['id' => $parent['id']]);
1175                 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]);
1176         }
1177
1178         /**
1179          * Distribute the given item to users who subscribed to their tags
1180          *
1181          * @param array $item     Processed item
1182          */
1183         private static function distributeByTags(array $item)
1184         {
1185                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1186                         return;
1187                 }
1188
1189                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1190                 foreach ($uids as $uid) {
1191                         if (Contact::isSharing($item['author-id'], $uid)) {
1192                                 $fields = [];
1193                         } else {
1194                                 $fields = ['post-reason' => self::PR_TAG];
1195                         }
1196
1197                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1198                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1199                 }
1200         }
1201
1202         /**
1203          * Distributes public items to the receivers
1204          *
1205          * @param integer $itemid      Item ID that should be added
1206          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1207          * @throws \Exception
1208          */
1209         public static function distribute($itemid, $signed_text = '')
1210         {
1211                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1212                 $parent = Post::selectFirst(['owner-id'], $condition);
1213                 if (!DBA::isResult($parent)) {
1214                         Logger::warning('Item not found', ['condition' => $condition]);
1215                         return;
1216                 }
1217
1218                 // Only distribute public items from native networks
1219                 $condition = ['id' => $itemid, 'uid' => 0,
1220                         'network' => array_merge(Protocol::FEDERATED ,['']),
1221                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1222                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1223                 if (!DBA::isResult($item)) {
1224                         Logger::warning('Item not found', ['condition' => $condition]);
1225                         return;
1226                 }
1227
1228                 $origin = $item['origin'];
1229
1230                 $users = [];
1231
1232                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1233                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1234                 if (!DBA::isResult($owner)) {
1235                         return;
1236                 }
1237
1238                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1239                 $contacts = DBA::select('contact', ['uid'], $condition);
1240                 while ($contact = DBA::fetch($contacts)) {
1241                         if ($contact['uid'] == 0) {
1242                                 continue;
1243                         }
1244
1245                         $users[$contact['uid']] = $contact['uid'];
1246                 }
1247                 DBA::close($contacts);
1248
1249                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1250                 $contacts = DBA::select('contact', ['uid'], $condition);
1251                 while ($contact = DBA::fetch($contacts)) {
1252                         if ($contact['uid'] == 0) {
1253                                 continue;
1254                         }
1255
1256                         $users[$contact['uid']] = $contact['uid'];
1257                 }
1258                 DBA::close($contacts);
1259
1260                 if (!empty($owner['alias'])) {
1261                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1262                         $contacts = DBA::select('contact', ['uid'], $condition);
1263                         while ($contact = DBA::fetch($contacts)) {
1264                                 if ($contact['uid'] == 0) {
1265                                         continue;
1266                                 }
1267
1268                                 $users[$contact['uid']] = $contact['uid'];
1269                         }
1270                         DBA::close($contacts);
1271                 }
1272
1273                 $origin_uid = 0;
1274
1275                 if ($item['uri-id'] != $item['parent-uri-id']) {
1276                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1277                         while ($parent = Post::fetch($parents)) {
1278                                 $users[$parent['uid']] = $parent['uid'];
1279                                 if ($parent['origin'] && !$origin) {
1280                                         $origin_uid = $parent['uid'];
1281                                 }
1282                         }
1283                         DBA::close($parents);
1284                 }
1285
1286                 foreach ($users as $uid) {
1287                         if ($origin_uid == $uid) {
1288                                 $item['diaspora_signed_text'] = $signed_text;
1289                         }
1290                         self::storeForUser($item, $uid);
1291                 }
1292         }
1293
1294         /**
1295          * Store a public item defined by their URI-ID for the given users
1296          *
1297          * @param integer $uri_id URI-ID of the given item
1298          * @param integer $uid    The user that will receive the item entry
1299          * @param array   $fields Additional fields to be stored
1300          * @return integer stored item id
1301          */
1302         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [])
1303         {
1304                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => 0]);
1305                 if (!DBA::isResult($item)) {
1306                         return 0;
1307                 }
1308
1309                 if (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED)) {
1310                         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']]);
1311                         return 0;
1312                 }
1313
1314                 $item['post-reason'] = self::PR_STORED;
1315
1316                 $item = array_merge($item, $fields);
1317
1318                 $stored = self::storeForUser($item, $uid);
1319                 Logger::info('Public item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1320                 return $stored;
1321         }
1322
1323         /**
1324          * Store a public item array for the given users
1325          *
1326          * @param array   $item   The item entry that will be stored
1327          * @param integer $uid    The user that will receive the item entry
1328          * @return integer stored item id
1329          * @throws \Exception
1330          */
1331         private static function storeForUser(array $item, int $uid)
1332         {
1333                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1334                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1335                         return 0;
1336                 }
1337
1338                 unset($item['id']);
1339                 unset($item['parent']);
1340                 unset($item['mention']);
1341                 unset($item['starred']);
1342                 unset($item['unseen']);
1343                 unset($item['psid']);
1344
1345                 $item['uid'] = $uid;
1346                 $item['origin'] = 0;
1347                 $item['wall'] = 0;
1348
1349                 if ($item['gravity'] == GRAVITY_PARENT) {
1350                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1351                 } else {
1352                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1353                 }
1354
1355                 if (!empty($contact['id'])) {
1356                         $item['contact-id'] = $contact['id'];
1357                 } else {
1358                         // Shouldn't happen at all
1359                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1360                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1361                         if (!DBA::isResult($self)) {
1362                                 // Shouldn't happen even less
1363                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1364                                 return 0;
1365                         }
1366                         $item['contact-id'] = $self['id'];
1367                 }
1368
1369                 /// @todo Handling of "event-id"
1370
1371                 $notify = false;
1372                 if ($item['gravity'] == GRAVITY_PARENT) {
1373                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1374                         if (DBA::isResult($contact)) {
1375                                 $notify = self::isRemoteSelf($contact, $item);
1376                         }
1377                 }
1378
1379                 $distributed = self::insert($item, $notify, true);
1380
1381                 if (!$distributed) {
1382                         Logger::info("Distributed public item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1383                 } else {
1384                         Logger::info('Distributed public item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1385                 }
1386                 return $distributed;
1387         }
1388
1389         /**
1390          * Add a shadow entry for a given item id that is a thread starter
1391          *
1392          * We store every public item entry additionally with the user id "0".
1393          * This is used for the community page and for the search.
1394          * It is planned that in the future we will store public item entries only once.
1395          *
1396          * @param integer $itemid Item ID that should be added
1397          * @throws \Exception
1398          */
1399         private static function addShadow($itemid)
1400         {
1401                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1402                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1403                 $item = Post::selectFirst($fields, $condition);
1404
1405                 if (!DBA::isResult($item)) {
1406                         return;
1407                 }
1408
1409                 // is it already a copy?
1410                 if (($itemid == 0) || ($item['uid'] == 0)) {
1411                         return;
1412                 }
1413
1414                 // Is it a visible public post?
1415                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1416                         return;
1417                 }
1418
1419                 // is it an entry from a connector? Only add an entry for natively connected networks
1420                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1421                         return;
1422                 }
1423
1424                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1425                         return;
1426                 }
1427
1428                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1429
1430                 if (DBA::isResult($item)) {
1431                         // Preparing public shadow (removing user specific data)
1432                         $item['uid'] = 0;
1433                         unset($item['id']);
1434                         unset($item['parent']);
1435                         unset($item['wall']);
1436                         unset($item['mention']);
1437                         unset($item['origin']);
1438                         unset($item['starred']);
1439                         unset($item['postopts']);
1440                         unset($item['inform']);
1441                         unset($item['post-reason']);
1442                         if ($item['uri-id'] == $item['parent-uri-id']) {
1443                                 $item['contact-id'] = $item['owner-id'];
1444                         } else {
1445                                 $item['contact-id'] = $item['author-id'];
1446                         }
1447
1448                         $public_shadow = self::insert($item, false, true);
1449
1450                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1451                 }
1452         }
1453
1454         /**
1455          * Add a shadow entry for a given item id that is a comment
1456          *
1457          * This function does the same like the function above - but for comments
1458          *
1459          * @param integer $itemid Item ID that should be added
1460          * @throws \Exception
1461          */
1462         private static function addShadowPost($itemid)
1463         {
1464                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1465                 if (!DBA::isResult($item)) {
1466                         return;
1467                 }
1468
1469                 // Is it a toplevel post?
1470                 if ($item['gravity'] == GRAVITY_PARENT) {
1471                         self::addShadow($itemid);
1472                         return;
1473                 }
1474
1475                 // Is this a shadow entry?
1476                 if ($item['uid'] == 0) {
1477                         return;
1478                 }
1479
1480                 // Is there a shadow parent?
1481                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1482                         return;
1483                 }
1484
1485                 // Is there already a shadow entry?
1486                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1487                         return;
1488                 }
1489
1490                 // Save "origin" and "parent" state
1491                 $origin = $item['origin'];
1492                 $parent = $item['parent'];
1493
1494                 // Preparing public shadow (removing user specific data)
1495                 $item['uid'] = 0;
1496                 unset($item['id']);
1497                 unset($item['parent']);
1498                 unset($item['wall']);
1499                 unset($item['mention']);
1500                 unset($item['origin']);
1501                 unset($item['starred']);
1502                 unset($item['postopts']);
1503                 unset($item['inform']);
1504                 unset($item['post-reason']);
1505                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1506
1507                 $public_shadow = self::insert($item, false, true);
1508
1509                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1510
1511                 // If this was a comment to a Diaspora post we don't get our comment back.
1512                 // This means that we have to distribute the comment by ourselves.
1513                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1514                         self::distribute($public_shadow);
1515                 }
1516         }
1517
1518         /**
1519          * Adds a language specification in a "language" element of given $arr.
1520          * Expects "body" element to exist in $arr.
1521          *
1522          * @param array $item
1523          * @return string detected language
1524          * @throws \Text_LanguageDetect_Exception
1525          */
1526         private static function getLanguage(array $item)
1527         {
1528                 if (!empty($item['language'])) {
1529                         return $item['language'];
1530                 }
1531
1532                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1533                         return '';
1534                 }
1535
1536                 // Convert attachments to links
1537                 $naked_body = BBCode::removeAttachment($item['body']);
1538                 if (empty($naked_body)) {
1539                         return '';
1540                 }
1541
1542                 // Remove links and pictures
1543                 $naked_body = BBCode::removeLinks($naked_body);
1544
1545                 // Convert the title and the body to plain text
1546                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1547
1548                 // Remove possibly remaining links
1549                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1550
1551                 if (empty($naked_body)) {
1552                         return '';
1553                 }
1554
1555                 $ld = new Language(DI::l10n()->getAvailableLanguages());
1556                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1557                 if (is_array($languages)) {
1558                         return json_encode($languages);
1559                 }
1560
1561                 return '';
1562         }
1563
1564         public static function getLanguageMessage(array $item)
1565         {
1566                 $iso639 = new \Matriphe\ISO639\ISO639;
1567
1568                 $used_languages = '';
1569                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1570                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1571                 }
1572                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1573                 return $used_languages;
1574         }
1575
1576         /**
1577          * Creates an unique guid out of a given uri
1578          *
1579          * @param string $uri uri of an item entry
1580          * @param string $host hostname for the GUID prefix
1581          * @return string unique guid
1582          */
1583         public static function guidFromUri($uri, $host)
1584         {
1585                 // Our regular guid routine is using this kind of prefix as well
1586                 // We have to avoid that different routines could accidentally create the same value
1587                 $parsed = parse_url($uri);
1588
1589                 // We use a hash of the hostname as prefix for the guid
1590                 $guid_prefix = hash("crc32", $host);
1591
1592                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1593                 unset($parsed["scheme"]);
1594
1595                 // Glue it together to be able to make a hash from it
1596                 $host_id = implode("/", $parsed);
1597
1598                 // We could use any hash algorithm since it isn't a security issue
1599                 $host_hash = hash("ripemd128", $host_id);
1600
1601                 return $guid_prefix.$host_hash;
1602         }
1603
1604         /**
1605          * generate an unique URI
1606          *
1607          * @param integer $uid  User id
1608          * @param string  $guid An existing GUID (Otherwise it will be generated)
1609          *
1610          * @return string
1611          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1612          */
1613         public static function newURI($uid, $guid = "")
1614         {
1615                 if ($guid == "") {
1616                         $guid = System::createUUID();
1617                 }
1618
1619                 return DI::baseUrl()->get() . '/objects/' . $guid;
1620         }
1621
1622         /**
1623          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1624          *
1625          * This can be used to filter for inactive contacts.
1626          * Only do this for public postings to avoid privacy problems, since poco data is public.
1627          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1628          *
1629          * @param array $arr Contains the just posted item record
1630          * @throws \Exception
1631          */
1632         private static function updateContact($arr)
1633         {
1634                 // Unarchive the author
1635                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1636                 if (DBA::isResult($contact)) {
1637                         Contact::unmarkForArchival($contact);
1638                 }
1639
1640                 // Unarchive the contact if it's not our own contact
1641                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1642                 if (DBA::isResult($contact)) {
1643                         Contact::unmarkForArchival($contact);
1644                 }
1645
1646                 /// @todo On private posts we could obfuscate the date
1647                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1648
1649                 // Is it a forum? Then we don't care about the rules from above
1650                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1651                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1652                                 $update = true;
1653                         }
1654                 }
1655
1656                 if ($update) {
1657                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1658                         // So we have to ensure to only update the last item when it had been our own post,
1659                         // or it had been done by a "regular" contact.
1660                         if (!empty($arr['wall'])) {
1661                                 $condition = ['id' => $arr['contact-id']];
1662                         } else {
1663                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1664                         }
1665                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1666                 }
1667                 // Now do the same for the system wide contacts with uid=0
1668                 if ($arr['private'] != self::PRIVATE) {
1669                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1670                                 ['id' => $arr['owner-id']]);
1671
1672                         if ($arr['owner-id'] != $arr['author-id']) {
1673                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1674                                         ['id' => $arr['author-id']]);
1675                         }
1676                 }
1677         }
1678
1679         public static function setHashtags($body)
1680         {
1681                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1682                         $tags = BBCode::getTags($body);
1683
1684                         // No hashtags?
1685                         if (!count($tags)) {
1686                                 return $body;
1687                         }
1688
1689                         // This sorting is important when there are hashtags that are part of other hashtags
1690                         // Otherwise there could be problems with hashtags like #test and #test2
1691                         // Because of this we are sorting from the longest to the shortest tag.
1692                         usort($tags, function ($a, $b) {
1693                                 return strlen($b) <=> strlen($a);
1694                         });
1695
1696                         $URLSearchString = "^\[\]";
1697
1698                         // All hashtags should point to the home server if "local_tags" is activated
1699                         if (DI::config()->get('system', 'local_tags')) {
1700                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1701                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1702                         }
1703
1704                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1705                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1706                                 function ($match) {
1707                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1708                                 }, $body);
1709
1710                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1711                                 function ($match) {
1712                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1713                                 }, $body);
1714
1715                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1716                                 function ($match) {
1717                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1718                                 }, $body);
1719
1720                         // Repair recursive urls
1721                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1722                                 "&num;$2", $body);
1723
1724                         foreach ($tags as $tag) {
1725                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1726                                         continue;
1727                                 }
1728
1729                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1730                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1731
1732                                 $body = str_replace($tag, $newtag, $body);
1733                         }
1734
1735                         // Convert back the masked hashtags
1736                         $body = str_replace("&num;", "#", $body);
1737
1738                         return $body;
1739                 });
1740
1741                 return $body;
1742         }
1743
1744         /**
1745          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1746          *
1747          * @param int $uid
1748          * @param int $item_id
1749          * @return boolean true if item was deleted, else false
1750          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1751          * @throws \ImagickException
1752          */
1753         private static function tagDeliver($uid, $item_id)
1754         {
1755                 $mention = false;
1756
1757                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
1758                 if (!DBA::isResult($user)) {
1759                         return false;
1760                 }
1761
1762                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
1763                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
1764
1765                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
1766                 if (!DBA::isResult($item)) {
1767                         return false;
1768                 }
1769
1770                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
1771
1772                 /*
1773                  * Diaspora uses their own hardwired link URL in @-tags
1774                  * instead of the one we supply with webfinger
1775                  */
1776                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
1777
1778                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1779                 if ($cnt) {
1780                         foreach ($matches as $mtch) {
1781                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
1782                                         $mention = true;
1783                                         Logger::log('mention found: ' . $mtch[2]);
1784                                 }
1785                         }
1786                 }
1787
1788                 if (!$mention) {
1789                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1790                         foreach ($tags as $tag) {
1791                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
1792                                         $mention = true;
1793                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
1794                                 }
1795                         }
1796                 }
1797
1798                 if (!$mention) {
1799                         if (($community_page || $prvgroup) &&
1800                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
1801                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item['id'], 'guid'=> $item['guid']]);
1802                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1803                                 return true;
1804                         }
1805                         return false;
1806                 }
1807
1808                 $arr = ['item' => $item, 'user' => $user];
1809
1810                 Hook::callAll('tagged', $arr);
1811
1812                 if (!$community_page && !$prvgroup) {
1813                         return false;
1814                 }
1815
1816                 /*
1817                  * tgroup delivery - setup a second delivery chain
1818                  * prevent delivery looping - only proceed
1819                  * if the message originated elsewhere and is a top-level post
1820                  */
1821                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1822                         return false;
1823                 }
1824
1825                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1826                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1827                 if (!DBA::isResult($self)) {
1828                         return false;
1829                 }
1830
1831                 $owner_id = Contact::getIdForURL($self['url']);
1832
1833                 // also reset all the privacy bits to the forum default permissions
1834
1835                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
1836
1837                 $psid = PermissionSet::getIdFromACL(
1838                         $user['uid'],
1839                         $user['allow_cid'],
1840                         $user['allow_gid'],
1841                         $user['deny_cid'],
1842                         $user['deny_gid']
1843                 );
1844
1845                 $forum_mode = ($prvgroup ? 2 : 1);
1846
1847                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1848                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
1849                 self::update($fields, ['id' => $item['id']]);
1850
1851                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, (int)$item['uri-id'], (int)$item['uid']);
1852
1853                 self::performActivity($item['id'], 'announce', $uid);
1854
1855                 return false;
1856         }
1857
1858         /**
1859          * Automatically reshare the item if the "remote_self" option is selected
1860          *
1861          * @param array $item
1862          * @return void
1863          */
1864         private static function autoReshare(array $item)
1865         {
1866                 if ($item['gravity'] != GRAVITY_PARENT) {
1867                         return;
1868                 }
1869
1870                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
1871                         return;
1872                 }
1873
1874                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1875                         return;
1876                 }
1877
1878                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1879
1880                 self::performActivity($item['id'], 'announce', $item['uid']);
1881         }
1882
1883         public static function isRemoteSelf($contact, &$datarray)
1884         {
1885                 if (!$contact['remote_self']) {
1886                         return false;
1887                 }
1888
1889                 // Prevent the forwarding of posts that are forwarded
1890                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
1891                         Logger::info('Already forwarded');
1892                         return false;
1893                 }
1894
1895                 // Prevent to forward already forwarded posts
1896                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
1897                         Logger::info('Already forwarded (second test)');
1898                         return false;
1899                 }
1900
1901                 // Only forward posts
1902                 if ($datarray["verb"] != Activity::POST) {
1903                         Logger::info('No post');
1904                         return false;
1905                 }
1906
1907                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
1908                         Logger::info('Not public');
1909                         return false;
1910                 }
1911
1912                 $datarray2 = $datarray;
1913                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
1914                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
1915                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
1916                                         ['uid' => $contact['uid'], 'self' => true]);
1917                         if (DBA::isResult($self)) {
1918                                 $datarray['contact-id'] = $self["id"];
1919
1920                                 $datarray['owner-name'] = $self["name"];
1921                                 $datarray['owner-link'] = $self["url"];
1922                                 $datarray['owner-avatar'] = $self["thumb"];
1923
1924                                 $datarray['author-name']   = $datarray['owner-name'];
1925                                 $datarray['author-link']   = $datarray['owner-link'];
1926                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
1927
1928                                 unset($datarray['edited']);
1929
1930                                 unset($datarray['network']);
1931                                 unset($datarray['owner-id']);
1932                                 unset($datarray['author-id']);
1933                         }
1934
1935                         if ($contact['network'] != Protocol::FEED) {
1936                                 $old_uri_id = $datarray["uri-id"] ?? 0;
1937                                 $datarray["guid"] = System::createUUID();
1938                                 unset($datarray["plink"]);
1939                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
1940                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
1941                                 $datarray["extid"] = Protocol::DFRN;
1942                                 $urlpart = parse_url($datarray2['author-link']);
1943                                 $datarray["app"] = $urlpart["host"];
1944                                 if (!empty($old_uri_id)) {
1945                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
1946                                 }
1947
1948                                 unset($datarray["parent-uri"]);
1949                                 unset($datarray["thr-parent"]);
1950                         } else {
1951                                 $datarray['private'] = self::PUBLIC;
1952                         }
1953                 }
1954
1955                 if ($contact['network'] != Protocol::FEED) {
1956                         // Store the original post
1957                         $result = self::insert($datarray2);
1958                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
1959                 } else {
1960                         $datarray["app"] = "Feed";
1961                         $result = true;
1962                 }
1963
1964                 // Trigger automatic reactions for addons
1965                 $datarray['api_source'] = true;
1966
1967                 // We have to tell the hooks who we are - this really should be improved
1968                 $_SESSION['authenticated'] = true;
1969                 $_SESSION['uid'] = $contact['uid'];
1970
1971                 return (bool)$result;
1972         }
1973
1974         /**
1975          *
1976          * @param string $s
1977          * @param int    $uid
1978          * @param array  $item
1979          * @param int    $cid
1980          * @return string
1981          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1982          * @throws \ImagickException
1983          */
1984         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
1985         {
1986                 if (DI::config()->get('system', 'disable_embedded')) {
1987                         return $s;
1988                 }
1989
1990                 Logger::info('check for photos');
1991                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
1992
1993                 $orig_body = $s;
1994                 $new_body = '';
1995
1996                 $img_start = strpos($orig_body, '[img');
1997                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1998                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1999
2000                 while (($img_st_close !== false) && ($img_len !== false)) {
2001                         $img_st_close++; // make it point to AFTER the closing bracket
2002                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2003
2004                         Logger::info('found photo', ['image' => $image]);
2005
2006                         if (stristr($image, $site . '/photo/')) {
2007                                 // Only embed locally hosted photos
2008                                 $replace = false;
2009                                 $i = basename($image);
2010                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2011                                 $x = strpos($i, '-');
2012
2013                                 if ($x) {
2014                                         $res = substr($i, $x + 1);
2015                                         $i = substr($i, 0, $x);
2016                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2017                                         if (DBA::isResult($photo)) {
2018                                                 /*
2019                                                  * Check to see if we should replace this photo link with an embedded image
2020                                                  * 1. No need to do so if the photo is public
2021                                                  * 2. If there's a contact-id provided, see if they're in the access list
2022                                                  *    for the photo. If so, embed it.
2023                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2024                                                  *    permissions, regardless of order but first check to see if they're an exact
2025                                                  *    match to save some processing overhead.
2026                                                  */
2027                                                 if (self::hasPermissions($photo)) {
2028                                                         if ($cid) {
2029                                                                 $recips = self::enumeratePermissions($photo);
2030                                                                 if (in_array($cid, $recips)) {
2031                                                                         $replace = true;
2032                                                                 }
2033                                                         } elseif ($item) {
2034                                                                 if (self::samePermissions($uid, $item, $photo)) {
2035                                                                         $replace = true;
2036                                                                 }
2037                                                         }
2038                                                 }
2039                                                 if ($replace) {
2040                                                         $photo_img = Photo::getImageForPhoto($photo);
2041                                                         // If a custom width and height were specified, apply before embedding
2042                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2043                                                                 Logger::info('scaling photo');
2044
2045                                                                 $width = intval($match[1]);
2046                                                                 $height = intval($match[2]);
2047
2048                                                                 $photo_img->scaleDown(max($width, $height));
2049                                                         }
2050
2051                                                         $data = $photo_img->asString();
2052                                                         $type = $photo_img->getType();
2053
2054                                                         Logger::info('replacing photo');
2055                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2056                                                         Logger::debug('replaced', ['image' => $image]);
2057                                                 }
2058                                         }
2059                                 }
2060                         }
2061
2062                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2063                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2064                         if ($orig_body === false) {
2065                                 $orig_body = '';
2066                         }
2067
2068                         $img_start = strpos($orig_body, '[img');
2069                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2070                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2071                 }
2072
2073                 $new_body = $new_body . $orig_body;
2074
2075                 return $new_body;
2076         }
2077
2078         private static function hasPermissions($obj)
2079         {
2080                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2081                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2082         }
2083
2084         private static function samePermissions($uid, $obj1, $obj2)
2085         {
2086                 // first part is easy. Check that these are exactly the same.
2087                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2088                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2089                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2090                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2091                         return true;
2092                 }
2093
2094                 // This is harder. Parse all the permissions and compare the resulting set.
2095                 $recipients1 = self::enumeratePermissions($obj1);
2096                 $recipients2 = self::enumeratePermissions($obj2);
2097                 sort($recipients1);
2098                 sort($recipients2);
2099
2100                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2101                 return ($recipients1 == $recipients2);
2102         }
2103
2104         /**
2105          * Returns an array of contact-ids that are allowed to see this object
2106          *
2107          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2108          * @param bool  $check_dead Prunes unavailable contacts from the result
2109          * @return array
2110          * @throws \Exception
2111          */
2112         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2113         {
2114                 $aclFormater = DI::aclFormatter();
2115
2116                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2117                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2118                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2119                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2120                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2121                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2122                 $recipients   = array_diff($recipients, $deny);
2123                 return $recipients;
2124         }
2125
2126         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2127         {
2128                 if (!$uid || ($days < 1)) {
2129                         return;
2130                 }
2131
2132                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2133                         $uid, GRAVITY_PARENT];
2134
2135                 /*
2136                  * $expire_network_only = save your own wall posts
2137                  * and just expire conversations started by others
2138                  */
2139                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2140
2141                 if ($expire_network_only) {
2142                         $condition[0] .= " AND NOT `wall`";
2143                 }
2144
2145                 if ($network != "") {
2146                         $condition[0] .= " AND `network` = ?";
2147                         $condition[] = $network;
2148                 }
2149
2150                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2151                 $condition[] = $days;
2152
2153                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2154
2155                 if (!DBA::isResult($items)) {
2156                         return;
2157                 }
2158
2159                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2160
2161                 // Forcing expiring of items - but not notes and marked items
2162                 if ($force) {
2163                         $expire_items = true;
2164                 }
2165
2166                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2167                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2168                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2169
2170                 $expired = 0;
2171
2172                 $priority = DI::config()->get('system', 'expire-notify-priority');
2173
2174                 while ($item = Post::fetch($items)) {
2175                         // don't expire filed items
2176                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2177                                 continue;
2178                         }
2179
2180                         // Only expire posts, not photos and photo comments
2181
2182                         if (!$expire_photos && !empty($item['resource-id'])) {
2183                                 continue;
2184                         } elseif (!$expire_starred && intval($item['starred'])) {
2185                                 continue;
2186                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2187                                 continue;
2188                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2189                                 continue;
2190                         }
2191
2192                         self::markForDeletionById($item['id'], $priority);
2193
2194                         ++$expired;
2195                 }
2196                 DBA::close($items);
2197                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2198         }
2199
2200         public static function firstPostDate($uid, $wall = false)
2201         {
2202                 $user = User::getById($uid, ['register_date']);
2203                 if (empty($user)) {
2204                         return false;
2205                 }
2206
2207                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2208                         $uid, $wall, $user['register_date']];
2209                 $params = ['order' => ['received' => false]];
2210                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2211                 if (DBA::isResult($thread)) {
2212                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2213                         return $postdate;
2214                 }
2215                 return false;
2216         }
2217
2218         /**
2219          * add/remove activity to an item
2220          *
2221          * Toggle activities as like,dislike,attend of an item
2222          *
2223          * @param int $item_id
2224          * @param string $verb
2225          *            Activity verb. One of
2226          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2227          *            attendno, unattendno, attendmaybe, unattendmaybe,
2228          *            announce, unannouce
2229          * @return bool
2230          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2231          * @throws \ImagickException
2232          * @hook  'post_local_end'
2233          *            array $arr
2234          *            'post_id' => ID of posted item
2235          */
2236         public static function performActivity(int $item_id, string $verb, int $uid)
2237         {
2238                 if (empty($uid)) {
2239                         return false;
2240                 }
2241
2242                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2243
2244                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2245                 if (!DBA::isResult($item)) {
2246                         Logger::log('like: unknown item ' . $item_id);
2247                         return false;
2248                 }
2249
2250                 $uri_id = $item['uri-id'];
2251
2252                 if (!in_array($item['uid'], [0, $uid])) {
2253                         return false;
2254                 }
2255
2256                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2257                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2258                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2259                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2260                                 if (!DBA::isResult($item)) {
2261                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2262                                         return false;
2263                                 }
2264                         }
2265                 }
2266
2267                 // Retrieves the local post owner
2268                 $owner = User::getOwnerDataById($uid);
2269                 if (empty($owner)) {
2270                         Logger::info('Empty owner for user', ['uid' => $uid]);
2271                         return false;
2272                 }
2273
2274                 // Retrieve the current logged in user's public contact
2275                 $author_id = Contact::getIdForURL($owner['url']);
2276                 if (empty($author_id)) {
2277                         Logger::info('Empty public contact');
2278                         return false;
2279                 }
2280
2281                 $activity = null;
2282                 switch ($verb) {
2283                         case 'like':
2284                         case 'unlike':
2285                                 $activity = Activity::LIKE;
2286                                 break;
2287                         case 'dislike':
2288                         case 'undislike':
2289                                 $activity = Activity::DISLIKE;
2290                                 break;
2291                         case 'attendyes':
2292                         case 'unattendyes':
2293                                 $activity = Activity::ATTEND;
2294                                 break;
2295                         case 'attendno':
2296                         case 'unattendno':
2297                                 $activity = Activity::ATTENDNO;
2298                                 break;
2299                         case 'attendmaybe':
2300                         case 'unattendmaybe':
2301                                 $activity = Activity::ATTENDMAYBE;
2302                                 break;
2303                         case 'follow':
2304                         case 'unfollow':
2305                                 $activity = Activity::FOLLOW;
2306                                 break;
2307                         case 'announce':
2308                         case 'unannounce':
2309                                 $activity = Activity::ANNOUNCE;
2310                                 break;
2311                         default:
2312                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2313                                 return false;
2314                 }
2315
2316                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2317
2318                 // Enable activity toggling instead of on/off
2319                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2320
2321                 // Look for an existing verb row
2322                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2323                 if ($event_verb_flag) {
2324                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2325
2326                         // Translate to the index based activity index
2327                         $vids = [];
2328                         foreach ($verbs as $verb) {
2329                                 $vids[] = Verb::getID($verb);
2330                         }
2331                 } else {
2332                         $vids = Verb::getID($activity);
2333                 }
2334
2335                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2336                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2337                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2338
2339                 if (DBA::isResult($like_item)) {
2340                         /**
2341                          * Truth table for existing activities
2342                          *
2343                          * |          Inputs            ||      Outputs      |
2344                          * |----------------------------||-------------------|
2345                          * |  Mode  | Event | Same verb || Delete? | Return? |
2346                          * |--------|-------|-----------||---------|---------|
2347                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2348                          * | create |  Yes  |    No     ||   Yes   |   No    |
2349                          * | create |  No   |    Yes    ||   No    |   Yes   |
2350                          * | create |  No   |    No     ||        N/A†       |
2351                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2352                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2353                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2354                          * | delete |  No   |    No     ||        N/A†       |
2355                          * |--------|-------|-----------||---------|---------|
2356                          * |   A    |   B   |     C     || A xor C | !B or C |
2357                          *
2358                          * † Can't happen: It's impossible to find an existing non-event activity without
2359                          *                 the same verb because we are only looking for this single verb.
2360                          *
2361                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2362                          */
2363                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2364                                 self::markForDeletionById($like_item['id']);
2365                         }
2366
2367                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2368                                 return true;
2369                         }
2370                 }
2371
2372                 // No need to go further if we aren't creating anything
2373                 if ($mode == 'delete') {
2374                         return true;
2375                 }
2376
2377                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2378
2379                 $new_item = [
2380                         'guid'          => System::createUUID(),
2381                         'uri'           => self::newURI($item['uid']),
2382                         'uid'           => $item['uid'],
2383                         'contact-id'    => $owner['id'],
2384                         'wall'          => $item['wall'],
2385                         'origin'        => 1,
2386                         'network'       => Protocol::DFRN,
2387                         'protocol'      => Conversation::PARCEL_DIRECT,
2388                         'direction'     => Conversation::PUSH,
2389                         'gravity'       => GRAVITY_ACTIVITY,
2390                         'parent'        => $item['id'],
2391                         'thr-parent'    => $item['uri'],
2392                         'owner-id'      => $author_id,
2393                         'author-id'     => $author_id,
2394                         'body'          => $activity,
2395                         'verb'          => $activity,
2396                         'object-type'   => $objtype,
2397                         'allow_cid'     => $item['allow_cid'],
2398                         'allow_gid'     => $item['allow_gid'],
2399                         'deny_cid'      => $item['deny_cid'],
2400                         'deny_gid'      => $item['deny_gid'],
2401                         'visible'       => 1,
2402                         'unseen'        => 1,
2403                 ];
2404
2405                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2406                 if (!empty($signed)) {
2407                         $new_item['diaspora_signed_text'] = json_encode($signed);
2408                 }
2409
2410                 $new_item_id = self::insert($new_item);
2411
2412                 // If the parent item isn't visible then set it to visible
2413                 if (!$item['visible']) {
2414                         self::update(['visible' => true], ['id' => $item['id']]);
2415                 }
2416
2417                 $new_item['id'] = $new_item_id;
2418
2419                 Hook::callAll('post_local_end', $new_item);
2420
2421                 return true;
2422         }
2423
2424         /**
2425          * Fetch the SQL condition for the given user id
2426          *
2427          * @param integer $owner_id User ID for which the permissions should be fetched
2428          * @return array condition
2429          */
2430         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2431         {
2432                 $local_user = local_user();
2433                 $remote_user = Session::getRemoteContactID($owner_id);
2434
2435                 // default permissions - anonymous user
2436                 $condition = ["`private` != ?", self::PRIVATE];
2437
2438                 if ($local_user && ($local_user == $owner_id)) {
2439                         // Profile owner - everything is visible
2440                         $condition = [];
2441                 } elseif ($remote_user) {
2442                          // Authenticated visitor - fetch the matching permissionsets
2443                         $set = PermissionSet::get($owner_id, $remote_user);
2444                         if (!empty($set)) {
2445                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2446                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2447                                         self::PRIVATE, self::PRIVATE];
2448                                 $condition = array_merge($condition, $set);
2449                         }
2450                 }
2451
2452                 return $condition;
2453         }
2454
2455         /**
2456          * Get a permission SQL string for the given user
2457          *
2458          * @param int $owner_id
2459          * @param string $table
2460          * @return string
2461          */
2462         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2463         {
2464                 $local_user = local_user();
2465                 $remote_user = Session::getRemoteContactID($owner_id);
2466
2467                 if (!empty($table)) {
2468                         $table = DBA::quoteIdentifier($table) . '.';
2469                 }
2470
2471                 /*
2472                  * Construct permissions
2473                  *
2474                  * default permissions - anonymous user
2475                  */
2476                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2477
2478                 // Profile owner - everything is visible
2479                 if ($local_user && ($local_user == $owner_id)) {
2480                         $sql = '';
2481                 } elseif ($remote_user) {
2482                         /*
2483                          * Authenticated visitor. Unless pre-verified,
2484                          * check that the contact belongs to this $owner_id
2485                          * and load the groups the visitor belongs to.
2486                          * If pre-verified, the caller is expected to have already
2487                          * done this and passed the groups into this function.
2488                          */
2489                         $set = PermissionSet::get($owner_id, $remote_user);
2490
2491                         if (!empty($set)) {
2492                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
2493                         } else {
2494                                 $sql_set = '';
2495                         }
2496
2497                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2498                 }
2499
2500                 return $sql;
2501         }
2502
2503         /**
2504          * get translated item type
2505          *
2506          * @param array                $item
2507          * @param \Friendica\Core\L10n $l10n
2508          * @return string
2509          */
2510         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2511         {
2512                 if (!empty($item['event-id'])) {
2513                         return $l10n->t('event');
2514                 } elseif (!empty($item['resource-id'])) {
2515                         return $l10n->t('photo');
2516                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2517                         return $l10n->t('activity');
2518                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2519                         return $l10n->t('comment');
2520                 }
2521
2522                 return $l10n->t('post');
2523         }
2524
2525         /**
2526          * Sets the "rendered-html" field of the provided item
2527          *
2528          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2529          *
2530          * @param array $item
2531          *
2532          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2533          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2534          */
2535         public static function putInCache(&$item)
2536         {
2537                 // Save original body to prevent addons to modify it
2538                 $body = $item['body'];
2539
2540                 $rendered_hash = $item['rendered-hash'] ?? '';
2541                 $rendered_html = $item['rendered-html'] ?? '';
2542
2543                 if ($rendered_hash == ''
2544                         || $rendered_html == ''
2545                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2546                         || DI::config()->get('system', 'ignore_cache')
2547                 ) {
2548                         self::addRedirToImageTags($item);
2549
2550                         $item['rendered-html'] = BBCode::convert($item['body']);
2551                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2552
2553                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2554                         Hook::callAll('put_item_in_cache', $hook_data);
2555                         $item['rendered-html'] = $hook_data['rendered-html'];
2556                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2557                         unset($hook_data);
2558
2559                         // Update if the generated values differ from the existing ones
2560                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2561                                 self::update(
2562                                         [
2563                                                 'rendered-html' => $item['rendered-html'],
2564                                                 'rendered-hash' => $item['rendered-hash']
2565                                         ],
2566                                         ['id' => $item['id']]
2567                                 );
2568                         }
2569                 }
2570
2571                 $item['body'] = $body;
2572         }
2573
2574         /**
2575          * Find any non-embedded images in private items and add redir links to them
2576          *
2577          * @param array &$item The field array of an item row
2578          */
2579         private static function addRedirToImageTags(array &$item)
2580         {
2581                 $app = DI::app();
2582
2583                 $matches = [];
2584                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2585                 if ($cnt) {
2586                         foreach ($matches as $mtch) {
2587                                 if (strpos($mtch[1], '/redir') !== false) {
2588                                         continue;
2589                                 }
2590
2591                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
2592                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2593                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2594                                 }
2595                         }
2596                 }
2597         }
2598
2599         /**
2600          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2601          * If attach is true, also add icons for item attachments.
2602          *
2603          * @param array   $item
2604          * @param boolean $attach
2605          * @param boolean $is_preview
2606          * @return string item body html
2607          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2608          * @throws \ImagickException
2609          * @hook  prepare_body_init item array before any work
2610          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2611          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2612          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2613          */
2614         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2615         {
2616                 $a = DI::app();
2617                 Hook::callAll('prepare_body_init', $item);
2618
2619                 // In order to provide theme developers more possibilities, event items
2620                 // are treated differently.
2621                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2622                         $ev = Event::getItemHTML($item);
2623                         return $ev;
2624                 }
2625
2626                 $tags = Tag::populateFromItem($item);
2627
2628                 $item['tags'] = $tags['tags'];
2629                 $item['hashtags'] = $tags['hashtags'];
2630                 $item['mentions'] = $tags['mentions'];
2631
2632                 // Compile eventual content filter reasons
2633                 $filter_reasons = [];
2634                 if (!$is_preview && public_contact() != $item['author-id']) {
2635                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2636                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2637                         }
2638
2639                         $hook_data = [
2640                                 'item' => $item,
2641                                 'filter_reasons' => $filter_reasons
2642                         ];
2643                         Hook::callAll('prepare_body_content_filter', $hook_data);
2644                         $filter_reasons = $hook_data['filter_reasons'];
2645                         unset($hook_data);
2646                 }
2647
2648                 $body = $item['body'] ?? '';
2649                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", '', $item['body']);
2650                 self::putInCache($item);
2651                 $item['body'] = $body;
2652                 $s = $item["rendered-html"];
2653
2654                 $hook_data = [
2655                         'item' => $item,
2656                         'html' => $s,
2657                         'preview' => $is_preview,
2658                         'filter_reasons' => $filter_reasons
2659                 ];
2660                 Hook::callAll('prepare_body', $hook_data);
2661                 $s = $hook_data['html'];
2662                 unset($hook_data);
2663
2664                 if (!$attach) {
2665                         // Replace the blockquotes with quotes that are used in mails.
2666                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2667                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2668                         return $s;
2669                 }
2670
2671                 $shared = BBCode::fetchShareAttributes($item['body']);
2672                 if (!empty($shared['guid'])) {
2673                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2674                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2675                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2676                         $attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2677                         $s = self::addVisualAttachments($attachments, $item, $s, true);
2678                         $s = self::addLinkAttachment($attachments, $body, $s, true, []);
2679                         $s = self::addNonVisualAttachments($attachments, $item, $s, true);
2680                         $shared_links = array_merge($shared_links, array_column($attachments['visual'], 'url'));
2681                         $shared_links = array_merge($shared_links, array_column($attachments['link'], 'url'));
2682                         $shared_links = array_merge($shared_links, array_column($attachments['additional'], 'url'));
2683                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2684                 } else {
2685                         $shared_uri_id = 0;
2686                         $shared_links = [];
2687                 }
2688
2689                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'], $shared_links);
2690                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2691                 $s = self::addLinkAttachment($attachments, $body, $s, false, $shared_links);
2692                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2693
2694                 // Map.
2695                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2696                         $x = Map::byCoordinates(trim($item['coord']));
2697                         if ($x) {
2698                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2699                         }
2700                 }
2701
2702                 // Replace friendica image url size with theme preference.
2703                 if (!empty($a->theme_info['item_image_size'])) {
2704                         $ps = $a->theme_info['item_image_size'];
2705                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2706                 }
2707
2708                 $s = HTML::applyContentFilter($s, $filter_reasons);
2709
2710                 $hook_data = ['item' => $item, 'html' => $s];
2711                 Hook::callAll('prepare_body_final', $hook_data);
2712
2713                 return $hook_data['html'];
2714         }
2715
2716         /**
2717          * Check if the body contains a link
2718          *
2719          * @param string $body
2720          * @param string $url
2721          * @return bool
2722          */
2723         public static function containsLink(string $body, string $url)
2724         {
2725                 if (strpos($body, $url)) {
2726                         return true;
2727                 }
2728                 foreach ([0, 1, 2] as $size) {
2729                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2730                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2731                                 return true;
2732                         }
2733                 }
2734                 return false;
2735         }
2736
2737         /**
2738          * Add visual attachments to the content
2739          *
2740          * @param array $attachments
2741          * @param array $item
2742          * @param string $content
2743          * @return string modified content
2744          */
2745         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2746         {
2747                 $stamp1 = microtime(true);
2748                 $leading = '';
2749                 $trailing = '';
2750
2751                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2752                 foreach ($attachments['visual'] as $attachment) {
2753                         if (self::containsLink($item['body'], $attachment['url'])) {
2754                                 continue;
2755                         }
2756
2757                         $author = ['uid' => 0, 'id' => $item['author-id'],
2758                                 'network' => $item['author-network'], 'url' => $item['author-link']];
2759                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
2760
2761                         if (!empty($attachment['preview'])) {
2762                                 $preview_url = Proxy::proxifyUrl(Contact::magicLinkByContact($author, $attachment['preview']));
2763                         } else {
2764                                 $preview_url = '';
2765                         }
2766
2767                         if (($attachment['filetype'] == 'video')) {
2768                                 /// @todo Move the template to /content as well
2769                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2770                                         '$video' => [
2771                                                 'id'      => $attachment['id'],
2772                                                 'src'     => $the_url,
2773                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2774                                                 'preview' => $preview_url,
2775                                                 'mime'    => $attachment['mimetype'],
2776                                         ],
2777                                 ]);
2778                                 if ($item['post-type'] == Item::PT_VIDEO) {
2779                                         $leading .= $media;
2780                                 } else {
2781                                         $trailing .= $media;
2782                                 }
2783                         } elseif ($attachment['filetype'] == 'audio') {
2784                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2785                                         '$audio' => [
2786                                                 'id'     => $attachment['id'],
2787                                                 'src'    => $the_url,
2788                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2789                                                 'mime'   => $attachment['mimetype'],
2790                                         ],
2791                                 ]);
2792                                 if ($item['post-type'] == Item::PT_AUDIO) {
2793                                         $leading .= $media;
2794                                 } else {
2795                                         $trailing .= $media;
2796                                 }
2797                         } elseif ($attachment['filetype'] == 'image') {
2798                                 if (empty($preview_url) && (max($attachment['width'], $attachment['height']) > 600)) {
2799                                         $preview_url = Proxy::proxifyUrl($the_url, false, ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
2800                                 }
2801                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2802                                         '$image' => [
2803                                                 'src'    => Proxy::proxifyUrl($the_url),
2804                                                 'preview' => $preview_url,
2805                                                 'attachment'   => $attachment,
2806                                         ],
2807                                 ]);
2808                                 // On Diaspora posts the attached pictures are leading
2809                                 if ($item['network'] == Protocol::DIASPORA) {
2810                                         $leading .= $media;
2811                                 } else {
2812                                         $trailing .= $media;
2813                                 }
2814                         }
2815                 }
2816
2817                 if ($shared) {
2818                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
2819                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
2820                 } else {
2821                         if ($leading != '') {
2822                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
2823                         }
2824
2825                         if ($trailing != '') {
2826                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
2827                         }
2828                 }
2829
2830                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
2831                 return $content;
2832         }
2833
2834         /**
2835          * Add link attachment to the content
2836          *
2837          * @param array  $attachments
2838          * @param string $body
2839          * @param string $content
2840          * @param bool   $shared
2841          * @param array  $ignore_links A list of URLs to ignore
2842          * @return string modified content
2843          */
2844         private static function addLinkAttachment(array $attachments, string $body, string $content, bool $shared, array $ignore_links)
2845         {
2846                 $stamp1 = microtime(true);
2847                 // @ToDo Check only for audio and video
2848                 $preview = empty($attachments['visual']);
2849
2850                 if (!empty($attachments['link'])) {
2851                         foreach ($attachments['link'] as $link) {
2852                                 $found = false;
2853                                 foreach ($ignore_links as $ignore_link) {
2854                                         if (Strings::compareLink($link['url'], $ignore_link)) {
2855                                                 $found = true;
2856                                         }
2857                                 }
2858                                 if (!$found) {
2859                                         $attachment = $link;
2860                                 }
2861                         }
2862                 }
2863
2864                 if (!empty($attachment)) {
2865                         $data = [
2866                                 'after' => '',
2867                                 'author_name' => $attachment['author-name'] ?? '',
2868                                 'author_url' =>  $attachment['author-url'] ?? '',
2869                                 'description' => $attachment['description'] ?? '',
2870                                 'image' => '',
2871                                 'preview' => '',
2872                                 'provider_name' => $attachment['publisher-name'] ?? '',
2873                                 'provider_url' => $attachment['publisher-url'] ?? '',
2874                                 'text' => '',
2875                                 'title' => $attachment['name'] ?? '',
2876                                 'type' => 'link',
2877                                 'url' => $attachment['url']];
2878
2879                         if ($preview) {
2880                                 if ($attachment['preview-width'] >= 500) {
2881                                         $data['image'] = $attachment['preview'] ?? '';
2882                                 } else {
2883                                         $data['preview'] = $attachment['preview'] ?? '';
2884                                 }
2885                         }
2886                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
2887                         $data = BBCode::getAttachmentData($match[1]);
2888                 }
2889                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
2890
2891                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
2892                         // @todo Use a template
2893                         $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data);
2894                         if ($shared) {
2895                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
2896                         } else {
2897                                 return $content . $rendered;
2898                         }
2899                 }
2900                 return $content;
2901         }
2902
2903         /**
2904          * Add non visual attachments to the content
2905          *
2906          * @param array $attachments
2907          * @param array $item
2908          * @param string $content
2909          * @return string modified content
2910          */
2911         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
2912         {
2913                 $stamp1 = microtime(true);
2914                 $trailing = '';
2915                 foreach ($attachments['additional'] as $attachment) {
2916                         if (strpos($item['body'], $attachment['url'])) {
2917                                 continue;
2918                         }
2919
2920                         $author = ['uid' => 0, 'id' => $item['author-id'],
2921                                 'network' => $item['author-network'], 'url' => $item['author-link']];
2922                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
2923
2924                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
2925
2926                         if (!empty($attachment['size'])) {
2927                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
2928                         }
2929
2930                         /// @todo Use a template
2931                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
2932                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
2933                 }
2934
2935                 if ($trailing != '') {
2936                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
2937                 }
2938
2939                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
2940                 return $content;
2941         }
2942
2943         /**
2944          * get private link for item
2945          *
2946          * @param array $item
2947          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
2948          * @throws \Exception
2949          */
2950         public static function getPlink($item)
2951         {
2952                 if (local_user()) {
2953                         $ret = [
2954                                 'href' => "display/" . $item['guid'],
2955                                 'orig' => "display/" . $item['guid'],
2956                                 'title' => DI::l10n()->t('View on separate page'),
2957                                 'orig_title' => DI::l10n()->t('view on separate page'),
2958                         ];
2959
2960                         if (!empty($item['plink'])) {
2961                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
2962                                 $ret["title"] = DI::l10n()->t('link to source');
2963                         }
2964                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
2965                         $ret = [
2966                                 'href' => $item['plink'],
2967                                 'orig' => $item['plink'],
2968                                 'title' => DI::l10n()->t('link to source'),
2969                         ];
2970                 } else {
2971                         $ret = [];
2972                 }
2973
2974                 return $ret;
2975         }
2976
2977         /**
2978          * Is the given item array a post that is sent as starting post to a forum?
2979          *
2980          * @param array $item
2981          * @param array $owner
2982          *
2983          * @return boolean "true" when it is a forum post
2984          */
2985         public static function isForumPost(array $item, array $owner = [])
2986         {
2987                 if (empty($owner)) {
2988                         $owner = User::getOwnerDataById($item['uid']);
2989                         if (empty($owner)) {
2990                                 return false;
2991                         }
2992                 }
2993
2994                 if (($item['author-id'] == $item['owner-id']) ||
2995                         ($owner['id'] == $item['contact-id']) ||
2996                         ($item['uri-id'] != $item['parent-uri-id']) ||
2997                         $item['origin']) {
2998                         return false;
2999                 }
3000
3001                 return Contact::isForum($item['contact-id']);
3002         }
3003
3004         /**
3005          * Search item id for given URI or plink
3006          *
3007          * @param string $uri
3008          * @param integer $uid
3009          *
3010          * @return integer item id
3011          */
3012         public static function searchByLink($uri, $uid = 0)
3013         {
3014                 $ssl_uri = str_replace('http://', 'https://', $uri);
3015                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3016
3017                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3018                 if (DBA::isResult($item)) {
3019                         return $item['id'];
3020                 }
3021
3022                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3023                 if (DBA::isResult($item)) {
3024                         return $item['id'];
3025                 }
3026
3027                 return 0;
3028         }
3029
3030         /**
3031          * Return the URI for a link to the post
3032          *
3033          * @param string $uri URI or link to post
3034          *
3035          * @return string URI
3036          */
3037         public static function getURIByLink(string $uri)
3038         {
3039                 $ssl_uri = str_replace('http://', 'https://', $uri);
3040                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3041
3042                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3043                 if (DBA::isResult($item)) {
3044                         return $item['uri'];
3045                 }
3046
3047                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3048                 if (DBA::isResult($item)) {
3049                         return $item['uri'];
3050                 }
3051
3052                 return '';
3053         }
3054
3055         /**
3056          * Fetches item for given URI or plink
3057          *
3058          * @param string $uri
3059          * @param integer $uid
3060          *
3061          * @return integer item id
3062          */
3063         public static function fetchByLink(string $uri, int $uid = 0)
3064         {
3065                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3066                 $item_id = self::searchByLink($uri, $uid);
3067                 if (!empty($item_id)) {
3068                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3069                         return $item_id;
3070                 }
3071
3072                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3073                         $item_id = self::searchByLink($fetched_uri, $uid);
3074                 } else {
3075                         $item_id = Diaspora::fetchByURL($uri);
3076                 }
3077
3078                 if (!empty($item_id)) {
3079                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3080                         return $item_id;
3081                 }
3082
3083                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3084                 return 0;
3085         }
3086
3087         /**
3088          * Return share data from an item array (if the item is shared item)
3089          * We are providing the complete Item array, because at some time in the future
3090          * we hopefully will define these values not in the body anymore but in some item fields.
3091          * This function is meant to replace all similar functions in the system.
3092          *
3093          * @param array $item
3094          *
3095          * @return array with share information
3096          */
3097         public static function getShareArray($item)
3098         {
3099                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3100                         return [];
3101                 }
3102
3103                 $attribute_string = $matches[2];
3104                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3105                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3106                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3107                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3108                         }
3109                 }
3110                 return $attributes;
3111         }
3112
3113         /**
3114          * Fetch item information for shared items from the original items and adds it.
3115          *
3116          * @param array $item
3117          *
3118          * @return array item array with data from the original item
3119          */
3120         public static function addShareDataFromOriginal(array $item)
3121         {
3122                 $shared = self::getShareArray($item);
3123                 if (empty($shared)) {
3124                         return $item;
3125                 }
3126
3127                 // Real reshares always have got a GUID.
3128                 if (empty($shared['guid'])) {
3129                         return $item;
3130                 }
3131
3132                 $uid = $item['uid'] ?? 0;
3133
3134                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3135                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3136                 if (!DBA::isResult($shared_item)) {
3137                         if (empty($shared['link'])) {
3138                                 return $item;
3139                         }
3140
3141                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3142                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3143                         if (empty($id)) {
3144                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3145                                 return $item;
3146                         }
3147
3148                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3149                         if (!DBA::isResult($shared_item)) {
3150                                 return $item;
3151                         }
3152                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3153                 } else {
3154                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3155                 }
3156
3157                 if (!empty($shared_item['title'])) {
3158                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3159                         unset($shared_item['title']);
3160                 } else {
3161                         $body = $shared_item['body'];
3162                 }
3163
3164                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3165                 unset($shared_item['body']);
3166
3167                 return array_merge($item, $shared_item);
3168         }
3169
3170         /**
3171          * Check a prospective item array against user-level permissions
3172          *
3173          * @param array $item Expected keys: uri, gravity, and
3174          *                    author-link if is author-id is set,
3175          *                    owner-link if is owner-id is set,
3176          *                    causer-link if is causer-id is set.
3177          * @param int   $user_id Local user ID
3178          * @return bool
3179          * @throws \Exception
3180          */
3181         protected static function isAllowedByUser(array $item, int $user_id)
3182         {
3183                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3184                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3185                         return false;
3186                 }
3187
3188                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3189                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3190                         return false;
3191                 }
3192
3193                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3194                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3195                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3196                         return false;
3197                 }
3198
3199                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3200                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3201                         return false;
3202                 }
3203
3204                 return true;
3205         }
3206 }