src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, 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_POLL = 33;
  60         const PT_PERSONAL_NOTE = 128;
  61
  62         // Posting reasons (Why had a post been stored for a user?)
  63         const PR_NONE = 0;
  64         const PR_TAG = 64;
  65         const PR_TO = 65;
  66         const PR_CC = 66;
  67         const PR_BTO = 67;
  68         const PR_BCC = 68;
  69         const PR_FOLLOWER = 69;
  70         const PR_ANNOUNCEMENT = 70;
  71         const PR_COMMENT = 71;
  72         const PR_STORED = 72;
  73         const PR_GLOBAL = 73;
  74         const PR_RELAY = 74;
  75         const PR_FETCHED = 75;
  76
  77         // Field list that is used to display the items
  78         const DISPLAY_FIELDLIST = [
  79                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  80                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri',
  81                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  82                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  83                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  84                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  85                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  86                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type',
  87                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  88                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  89                 'writable', 'self', 'cid', 'alias',
  90                 'event-created', 'event-edited', 'event-start', 'event-finish',
  91                 'event-summary', 'event-desc', 'event-location', 'event-type',
  92                 'event-nofinish', 'event-ignore', 'event-id',
  93                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  94         ];
  95
  96         // Field list that is used to deliver items via the protocols
  97         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  98                         'parent-guid', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  99                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 100                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 101                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 102                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 103                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'forum_mode', 'origin',
 104                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 105                         'event-created', 'event-edited', 'event-start', 'event-finish',
 106                         'event-summary', 'event-desc', 'event-location', 'event-type',
 107                         'event-nofinish', 'event-ignore', 'event-id'];
 108
 109         // All fields in the item table
 110         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 111                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 112                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 113                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 114                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 115                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 116                         'private', 'pubmail', 'visible', 'starred',
 117                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 118                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 119                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 120                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 121                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 122
 123         // List of all verbs that don't need additional content data.
 124         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 125         const ACTIVITIES = [
 126                 Activity::LIKE, Activity::DISLIKE,
 127                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 128                 Activity::FOLLOW,
 129                 Activity::ANNOUNCE];
 130
 131         const PUBLIC = 0;
 132         const PRIVATE = 1;
 133         const UNLISTED = 2;
 134
 135         /**
 136          * Update existing item entries
 137          *
 138          * @param array $fields    The fields that are to be changed
 139          * @param array $condition The condition for finding the item entries
 140          *
 141          * In the future we may have to change permissions as well.
 142          * Then we had to add the user id as third parameter.
 143          *
 144          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 145          *
 146          * @return integer|boolean number of affected rows - or "false" if there was an error
 147          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 148          */
 149         public static function update(array $fields, array $condition)
 150         {
 151                 if (empty($condition) || empty($fields)) {
 152                         return false;
 153                 }
 154
 155                 if (isset($fields['extid'])) {
 156                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 157                 }
 158
 159                 if (!empty($fields['verb'])) {
 160                         $fields['vid'] = Verb::getID($fields['verb']);
 161                 }
 162
 163                 if (!empty($fields['edited'])) {
 164                         $previous = Post::selectFirst(['edited'], $condition);
 165                 }
 166
 167                 $rows = Post::update($fields, $condition);
 168                 if (is_bool($rows)) {
 169                         return $rows;
 170                 }
 171
 172                 // We only need to call the line by line update for specific fields
 173                 if (empty($fields['body']) && empty($fields['file']) &&
 174                         empty($fields['attach']) && empty($fields['edited'])) {
 175                         return $rows;
 176                 }
 177
 178                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 179
 180                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 181
 182                 $notify_items = [];
 183
 184                 while ($item = DBA::fetch($items)) {
 185                         if (!empty($fields['body'])) {
 186                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 187
 188                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 189
 190                                 // Remove all media attachments from the body and store them in the post-media table
 191                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 192                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 193                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 194
 195                                 if ($item['author-network'] != Protocol::DFRN) {
 196                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 197                                 }
 198
 199                                 Post\Content::update($item['uri-id'], $content_fields);
 200                         }
 201
 202                         if (!empty($fields['file'])) {
 203                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 204                         }
 205
 206                         if (!empty($fields['attach'])) {
 207                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 208                         }
 209
 210                         // We only need to notfiy others when it is an original entry from us.
 211                         // Only call the notifier when the item had been edited and records had been changed.
 212                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 213                                 $notify_items[] = $item['id'];
 214                         }
 215                 }
 216
 217                 DBA::close($items);
 218
 219                 foreach ($notify_items as $notify_item) {
 220                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 221                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 222                 }
 223
 224                 return $rows;
 225         }
 226
 227         /**
 228          * Delete an item and notify others about it - if it was ours
 229          *
 230          * @param array   $condition The condition for finding the item entries
 231          * @param integer $priority  Priority for the notification
 232          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 233          */
 234         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 235         {
 236                 $items = Post::select(['id'], $condition);
 237                 while ($item = Post::fetch($items)) {
 238                         self::markForDeletionById($item['id'], $priority);
 239                 }
 240                 DBA::close($items);
 241         }
 242
 243         /**
 244          * Delete an item for an user and notify others about it - if it was ours
 245          *
 246          * @param array   $condition The condition for finding the item entries
 247          * @param integer $uid       User who wants to delete this item
 248          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 249          */
 250         public static function deleteForUser($condition, $uid)
 251         {
 252                 if ($uid == 0) {
 253                         return;
 254                 }
 255
 256                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 257                 while ($item = Post::fetch($items)) {
 258                         if (in_array($item['uid'], [$uid, 0])) {
 259                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 260                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 261                         }
 262
 263                         if ($item['uid'] == $uid) {
 264                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 265                         } elseif ($item['uid'] != 0) {
 266                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 267                         }
 268                 }
 269                 DBA::close($items);
 270         }
 271
 272         /**
 273          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 274          *
 275          * @param integer $item_id
 276          * @param integer $priority Priority for the notification
 277          *
 278          * @return boolean success
 279          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 280          */
 281         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 282         {
 283                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 284                 // locate item to be deleted
 285                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 286                         'deleted', 'resource-id', 'event-id',
 287                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 288                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 289                 if (!DBA::isResult($item)) {
 290                         Logger::info('Item not found.', ['id' => $item_id]);
 291                         return false;
 292                 }
 293
 294                 if ($item['deleted']) {
 295                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 296                         return false;
 297                 }
 298
 299                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 300                 if (!DBA::isResult($parent)) {
 301                         $parent = ['origin' => false];
 302                 }
 303
 304                 // clean up categories and tags so they don't end up as orphans
 305                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 306
 307                 /*
 308                  * If item is a link to a photo resource, nuke all the associated photos
 309                  * (visitors will not have photo resources)
 310                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 311                  * generate a resource-id and therefore aren't intimately linked to the item.
 312                  */
 313                 /// @TODO: this should first check if photo is used elsewhere
 314                 if (strlen($item['resource-id'])) {
 315                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 316                 }
 317
 318                 // If item is a link to an event, delete the event.
 319                 if (intval($item['event-id'])) {
 320                         Event::delete($item['event-id']);
 321                 }
 322
 323                 // If item has attachments, drop them
 324                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 325                 foreach($attachments as $attachment) {
 326                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 327                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 328                         }
 329                 }
 330
 331                 // Set the item to "deleted"
 332                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 333                 Post::update($item_fields, ['id' => $item['id']]);
 334
 335                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 336
 337                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 338                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 339                 }
 340
 341                 Post\DeliveryData::delete($item['uri-id']);
 342
 343                 // If it's the parent of a comment thread, kill all the kids
 344                 if ($item['gravity'] == GRAVITY_PARENT) {
 345                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 346                 }
 347
 348                 // Is it our comment and/or our thread?
 349                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 350                         // When we delete the original post we will delete all existing copies on the server as well
 351                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 352
 353                         // send the notification upstream/downstream
 354                         if ($priority) {
 355                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 356                         }
 357                 } elseif ($item['uid'] != 0) {
 358                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 359                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 360                 }
 361
 362                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 363
 364                 return true;
 365         }
 366
 367         public static function guid($item, $notify)
 368         {
 369                 if (!empty($item['guid'])) {
 370                         return trim($item['guid']);
 371                 }
 372
 373                 if ($notify) {
 374                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 375                         // We add the hash of our own host because our host is the original creator of the post.
 376                         $prefix_host = DI::baseUrl()->getHostname();
 377                 } else {
 378                         $prefix_host = '';
 379
 380                         // We are only storing the post so we create a GUID from the original hostname.
 381                         if (!empty($item['author-link'])) {
 382                                 $parsed = parse_url($item['author-link']);
 383                                 if (!empty($parsed['host'])) {
 384                                         $prefix_host = $parsed['host'];
 385                                 }
 386                         }
 387
 388                         if (empty($prefix_host) && !empty($item['plink'])) {
 389                                 $parsed = parse_url($item['plink']);
 390                                 if (!empty($parsed['host'])) {
 391                                         $prefix_host = $parsed['host'];
 392                                 }
 393                         }
 394
 395                         if (empty($prefix_host) && !empty($item['uri'])) {
 396                                 $parsed = parse_url($item['uri']);
 397                                 if (!empty($parsed['host'])) {
 398                                         $prefix_host = $parsed['host'];
 399                                 }
 400                         }
 401
 402                         // Is it in the format data@host.tld? - Used for mail contacts
 403                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 404                                 $mailparts = explode('@', $item['author-link']);
 405                                 $prefix_host = array_pop($mailparts);
 406                         }
 407                 }
 408
 409                 if (!empty($item['plink'])) {
 410                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 411                 } elseif (!empty($item['uri'])) {
 412                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 413                 } else {
 414                         $guid = System::createUUID(hash('crc32', $prefix_host));
 415                 }
 416
 417                 return $guid;
 418         }
 419
 420         private static function contactId($item)
 421         {
 422                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 423                         return $item['contact-id'];
 424                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 425                         return $item['contact-id'];
 426                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 427                         return $item['author-id'];
 428                 } elseif (!empty($item['contact-id'])) {
 429                         return $item['contact-id'];
 430                 } else {
 431                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 432                         if (!empty($contact_id)) {
 433                                 return $contact_id;
 434                         }
 435                 }
 436                 return $item['author-id'];
 437         }
 438
 439         /**
 440          * Write an item array into a spool file to be inserted later.
 441          * This command is called whenever there are issues storing an item.
 442          *
 443          * @param array $item The item fields that are to be inserted
 444          * @throws \Exception
 445          */
 446         private static function spool($orig_item)
 447         {
 448                 // Now we store the data in the spool directory
 449                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 450                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 451
 452                 $spoolpath = System::getSpoolPath();
 453                 if ($spoolpath != "") {
 454                         $spool = $spoolpath . '/' . $file;
 455
 456                         file_put_contents($spool, json_encode($orig_item));
 457                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 458                 }
 459         }
 460
 461         /**
 462          * Check if the item array is a duplicate
 463          *
 464          * @param array $item
 465          * @return boolean is it a duplicate?
 466          */
 467         private static function isDuplicate(array $item)
 468         {
 469                 // Checking if there is already an item with the same guid
 470                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 471                 if (Post::exists($condition)) {
 472                         Logger::notice('Found already existing item', $condition);
 473                         return true;
 474                 }
 475
 476                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 477                         'network' => [$item['network'], Protocol::DFRN]];
 478                 if (Post::exists($condition)) {
 479                         Logger::notice('duplicated item with the same uri found.', $condition);
 480                         return true;
 481                 }
 482
 483                 // On Friendica and Diaspora the GUID is unique
 484                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 485                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 486                         if (Post::exists($condition)) {
 487                                 Logger::notice('duplicated item with the same guid found.', $condition);
 488                                 return true;
 489                         }
 490                 } elseif ($item['network'] == Protocol::OSTATUS) {
 491                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 492                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 493                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 494                         if (Post::exists($condition)) {
 495                                 Logger::notice('duplicated item with the same body found.', $item);
 496                                 return true;
 497                         }
 498                 }
 499
 500                 /*
 501                  * Check for already added items.
 502                  * There is a timing issue here that sometimes creates double postings.
 503                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 504                  */
 505                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 506                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 507                         return true;
 508                 }
 509
 510                 return false;
 511         }
 512
 513         /**
 514          * Check if the item array is valid
 515          *
 516          * @param array $item
 517          * @return boolean item is valid
 518          */
 519         public static function isValid(array $item)
 520         {
 521                 // When there is no content then we don't post it
 522                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 523                         Logger::notice('No body, no title.');
 524                         return false;
 525                 }
 526
 527                 if (!empty($item['uid'])) {
 528                         $owner = User::getOwnerDataById($item['uid'], false);
 529                         if (!$owner) {
 530                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 531                                 return false;
 532                         }
 533
 534                         if ($owner['account_expired'] || $owner['account_removed']) {
 535                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 536                                 return false;
 537                         }
 538                 }
 539
 540                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 541                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 542                         return false;
 543                 }
 544
 545                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 546                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 547                         return false;
 548                 }
 549
 550                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 551                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 552                         return false;
 553                 }
 554
 555                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 556                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 557                         return false;
 558                 }
 559
 560                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 561                         return false;
 562                 }
 563
 564                 if ($item['verb'] == Activity::FOLLOW) {
 565                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 566                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 567                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 568                                 return false;
 569                         }
 570
 571                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 572                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 573                         if (Post::exists($condition)) {
 574                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 575                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 576                                 return false;
 577                         }
 578                 }
 579
 580                 return true;
 581         }
 582
 583         /**
 584          * Check if the item array is too old
 585          *
 586          * @param array $item
 587          * @return boolean item is too old
 588          */
 589         public static function isTooOld(array $item)
 590         {
 591                 // check for create date and expire time
 592                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 593
 594                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 595                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 596                         $expire_interval = $user['expire'];
 597                 }
 598
 599                 if (($expire_interval > 0) && !empty($item['created'])) {
 600                         $expire_date = time() - ($expire_interval * 86400);
 601                         $created_date = strtotime($item['created']);
 602                         if ($created_date < $expire_date) {
 603                                 Logger::notice('Item created before expiration interval.', [
 604                                         'created' => date('c', $created_date),
 605                                         'expired' => date('c', $expire_date),
 606                                         '$item' => $item
 607                                 ]);
 608                                 return true;
 609                         }
 610                 }
 611
 612                 return false;
 613         }
 614
 615         /**
 616          * Return the id of the given item array if it has been stored before
 617          *
 618          * @param array $item
 619          * @return integer item id
 620          */
 621         private static function getDuplicateID(array $item)
 622         {
 623                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 624                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 625                                 $item['uri-id'], $item['uid'],
 626                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 627                         $existing = Post::selectFirst(['id', 'network'], $condition);
 628                         if (DBA::isResult($existing)) {
 629                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 630                                 if ($item['uid'] != 0) {
 631                                         Logger::notice('Item already existed for user', [
 632                                                 'uri-id' => $item['uri-id'],
 633                                                 'uid' => $item['uid'],
 634                                                 'network' => $item['network'],
 635                                                 'existing_id' => $existing["id"],
 636                                                 'existing_network' => $existing["network"]
 637                                         ]);
 638                                 }
 639
 640                                 return $existing["id"];
 641                         }
 642                 }
 643                 return 0;
 644         }
 645
 646         /**
 647          * Fetch top-level parent data for the given item array
 648          *
 649          * @param array $item
 650          * @return array item array with parent data
 651          * @throws \Exception
 652          */
 653         private static function getTopLevelParent(array $item)
 654         {
 655                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 656                         'uri-id', 'parent-uri-id',
 657                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 658                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
 659                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 660                 $params = ['order' => ['id' => false]];
 661                 $parent = Post::selectFirst($fields, $condition, $params);
 662
 663                 if (!DBA::isResult($parent) && $item['origin']) {
 664                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid']);
 665                         Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 666                         $parent = Post::selectFirst($fields, $condition, $params);
 667                 }
 668
 669                 if (!DBA::isResult($parent)) {
 670                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 671                         return [];
 672                 }
 673
 674                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 675                         return $parent;
 676                 }
 677
 678                 $condition = ['uri-id' => $parent['parent-uri-id'],
 679                         'parent-uri-id' => $parent['parent-uri-id'],
 680                         'uid' => $parent['uid']];
 681                 $params = ['order' => ['id' => false]];
 682                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 683
 684                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 685                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid']);
 686                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 687                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 688                 }
 689
 690                 if (!DBA::isResult($toplevel_parent)) {
 691                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 692                         return [];
 693                 }
 694
 695                 return $toplevel_parent;
 696         }
 697
 698         /**
 699          * Get the gravity for the given item array
 700          *
 701          * @param array $item
 702          * @return integer gravity
 703          */
 704         private static function getGravity(array $item)
 705         {
 706                 $activity = DI::activity();
 707
 708                 if (isset($item['gravity'])) {
 709                         return intval($item['gravity']);
 710                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 711                         return GRAVITY_PARENT;
 712                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 713                         return GRAVITY_COMMENT;
 714                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 715                         return GRAVITY_ACTIVITY;
 716                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 717                         return GRAVITY_ACTIVITY;
 718                 }
 719                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 720                 return GRAVITY_UNKNOWN;   // Should not happen
 721         }
 722
 723         public static function insert(array $item, bool $notify = false, bool $post_local = true)
 724         {
 725                 $orig_item = $item;
 726
 727                 $priority = PRIORITY_HIGH;
 728
 729                 // If it is a posting where users should get notifications, then define it as wall posting
 730                 if ($notify) {
 731                         $item['wall'] = 1;
 732                         $item['origin'] = 1;
 733                         $item['network'] = Protocol::DFRN;
 734                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 735                         $item['direction'] = Conversation::PUSH;
 736
 737                         if (in_array($notify, PRIORITIES)) {
 738                                 $priority = $notify;
 739                         }
 740                 } else {
 741                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 742                 }
 743
 744                 $uid = intval($item['uid']);
 745
 746                 $item['guid'] = self::guid($item, $notify);
 747                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 748
 749                 // Store URI data
 750                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 751
 752                 // Backward compatibility: parent-uri used to be the direct parent uri.
 753                 // If it is provided without a thr-parent, it probably is the old behavior.
 754                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 755                 $item['parent-uri'] = $item['thr-parent'];
 756
 757                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 758
 759                 // Store conversation data
 760                 $item = Conversation::insert($item);
 761
 762                 /*
 763                  * Do we already have this item?
 764                  * We have to check several networks since Friendica posts could be repeated
 765                  * via OStatus (maybe Diasporsa as well)
 766                  */
 767                 $duplicate = self::getDuplicateID($item);
 768                 if ($duplicate) {
 769                         return $duplicate;
 770                 }
 771
 772                 // Additional duplicate checks
 773                 /// @todo Check why the first duplication check returns the item number and the second a 0
 774                 if (self::isDuplicate($item)) {
 775                         return 0;
 776                 }
 777
 778                 if (!isset($item['post-type'])) {
 779                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 780                 }
 781
 782                 $item['wall']          = intval($item['wall'] ?? 0);
 783                 $item['extid']         = trim($item['extid'] ?? '');
 784                 $item['author-name']   = trim($item['author-name'] ?? '');
 785                 $item['author-link']   = trim($item['author-link'] ?? '');
 786                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 787                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 788                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 789                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 790                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 791                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 792                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 793                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 794                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 795                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 796                 $item['location']      = trim($item['location'] ?? '');
 797                 $item['coord']         = trim($item['coord'] ?? '');
 798                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 799                 $item['deleted']       = 0;
 800                 $item['verb']          = trim($item['verb'] ?? '');
 801                 $item['object-type']   = trim($item['object-type'] ?? '');
 802                 $item['object']        = trim($item['object'] ?? '');
 803                 $item['target-type']   = trim($item['target-type'] ?? '');
 804                 $item['target']        = trim($item['target'] ?? '');
 805                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 806                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 807                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 808                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 809                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 810                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 811                 $item['body']          = trim($item['body'] ?? '');
 812                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 813                 $item['app']           = trim($item['app'] ?? '');
 814                 $item['origin']        = intval($item['origin'] ?? 0);
 815                 $item['postopts']      = trim($item['postopts'] ?? '');
 816                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 817                 $item['event-id']      = intval($item['event-id'] ?? 0);
 818                 $item['inform']        = trim($item['inform'] ?? '');
 819                 $item['file']          = trim($item['file'] ?? '');
 820
 821                 // Items cannot be stored before they happen ...
 822                 if ($item['created'] > DateTimeFormat::utcNow()) {
 823                         $item['created'] = DateTimeFormat::utcNow();
 824                 }
 825
 826                 // We haven't invented time travel by now.
 827                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 828                         $item['edited'] = DateTimeFormat::utcNow();
 829                 }
 830
 831                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 832
 833                 $item['gravity'] = self::getGravity($item);
 834
 835                 $item['language'] = self::getLanguage($item);
 836
 837                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 838                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 839                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 840
 841                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 842                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 843                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 844
 845                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 846                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 847                         $item['post-reason'] = self::PR_FOLLOWER;
 848                 }
 849
 850                 // Ensure that there is an avatar cache
 851                 Contact::checkAvatarCache($item['author-id']);
 852                 Contact::checkAvatarCache($item['owner-id']);
 853
 854                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 855                 $item["contact-id"] = self::contactId($item);
 856
 857                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 858                         self::isTooOld($item)) {
 859                         Logger::info('Item is too old', ['item' => $item]);
 860                         return 0;
 861                 }
 862
 863                 if (!self::isValid($item)) {
 864                         return 0;
 865                 }
 866
 867                 if ($item['gravity'] !== GRAVITY_PARENT) {
 868                         $toplevel_parent = self::getTopLevelParent($item);
 869                         if (empty($toplevel_parent)) {
 870                                 return 0;
 871                         }
 872
 873                         // If the thread originated from this node, we check the permission against the thread starter
 874                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 875                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 876                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 877                                 return 0;
 878                         }
 879
 880                         $parent_id             = $toplevel_parent['id'];
 881                         $item['parent-uri']    = $toplevel_parent['uri'];
 882                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 883                         $item['deleted']       = $toplevel_parent['deleted'];
 884                         $item['allow_cid']     = $toplevel_parent['allow_cid'];
 885                         $item['allow_gid']     = $toplevel_parent['allow_gid'];
 886                         $item['deny_cid']      = $toplevel_parent['deny_cid'];
 887                         $item['deny_gid']      = $toplevel_parent['deny_gid'];
 888                         $parent_origin         = $toplevel_parent['origin'];
 889
 890                         // Don't federate received participation messages
 891                         if ($item['verb'] != Activity::FOLLOW) {
 892                                 $item['wall'] = $toplevel_parent['wall'];
 893                         } else {
 894                                 $item['wall'] = false;
 895                                 // Participations are technical messages, so they are set to "seen" automatically
 896                                 $item['unseen'] = false;
 897                         }
 898
 899                         /*
 900                          * If the parent is private, force privacy for the entire conversation
 901                          * This differs from the above settings as it subtly allows comments from
 902                          * email correspondents to be private even if the overall thread is not.
 903                          */
 904                         if ($toplevel_parent['private']) {
 905                                 $item['private'] = $toplevel_parent['private'];
 906                         }
 907
 908                         /*
 909                          * Edge case. We host a public forum that was originally posted to privately.
 910                          * The original author commented, but as this is a comment, the permissions
 911                          * weren't fixed up so it will still show the comment as private unless we fix it here.
 912                          */
 913                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
 914                                 $item['private'] = self::PUBLIC;
 915                         }
 916
 917                         // If its a post that originated here then tag the thread as "mention"
 918                         if ($item['origin'] && $item['uid']) {
 919                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 920                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 921                         }
 922
 923                         // Update the contact relations
 924                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 925                 } else {
 926                         $parent_id = 0;
 927                         $parent_origin = $item['origin'];
 928                 }
 929
 930                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 931                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 932
 933                 // Is this item available in the global items (with uid=0)?
 934                 if ($item["uid"] == 0) {
 935                         $item["global"] = true;
 936
 937                         // Set the global flag on all items if this was a global item entry
 938                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 939                 } else {
 940                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 941                 }
 942
 943                 // ACL settings
 944                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 945                         $item["private"] = self::PRIVATE;
 946                 }
 947
 948                 if ($notify && $post_local) {
 949                         $item['edit'] = false;
 950                         $item['parent'] = $parent_id;
 951
 952                         // Trigger automatic reactions for addons
 953                         if (!isset($item['api_source'])) {
 954                                 $item['api_source'] = true;
 955                         }
 956
 957                         // We have to tell the hooks who we are - this really should be improved
 958                         if (!local_user()) {
 959                                 $_SESSION['authenticated'] = true;
 960                                 $_SESSION['uid'] = $uid;
 961                                 $dummy_session = true;
 962                         } else {
 963                                 $dummy_session = false;
 964                         }
 965
 966                         Hook::callAll('post_local', $item);
 967
 968                         if ($dummy_session) {
 969                                 unset($_SESSION['authenticated']);
 970                                 unset($_SESSION['uid']);
 971                         }
 972                 } elseif (!$notify) {
 973                         Hook::callAll('post_remote', $item);
 974                 }
 975
 976                 if (!empty($item['cancel'])) {
 977                         Logger::notice('post cancelled by addon.');
 978                         return 0;
 979                 }
 980
 981                 if (empty($item['vid']) && !empty($item['verb'])) {
 982                         $item['vid'] = Verb::getID($item['verb']);
 983                 }
 984
 985                 // Creates or assigns the permission set
 986                 $item['psid'] = DI::permissionSet()->selectOrCreate(
 987                         DI::permissionSetFactory()->createFromString(
 988                                 $item['uid'],
 989                                 $item['allow_cid'],
 990                                 $item['allow_gid'],
 991                                 $item['deny_cid'],
 992                                 $item['deny_gid']
 993                 ))->id;
 994
 995                 if (!empty($item['extid'])) {
 996                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
 997                 }
 998
 999                 if ($item['verb'] == Activity::ANNOUNCE) {
1000                         self::setOwnerforResharedItem($item);
1001                 }
1002
1003                 if (isset($item['attachments'])) {
1004                         foreach ($item['attachments'] as $attachment) {
1005                                 $attachment['uri-id'] = $item['uri-id'];
1006                                 Post\Media::insert($attachment);
1007                         }
1008                         unset($item['attachments']);
1009                 }
1010
1011                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1012
1013                 // Remove all media attachments from the body and store them in the post-media table
1014                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1015                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1016
1017                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1018                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1019                 }
1020
1021                 // Check for hashtags in the body and repair or add hashtag links
1022                 $item['body'] = self::setHashtags($item['body']);
1023
1024                 if (stristr($item['verb'], Activity::POKE)) {
1025                         $notify_type = Delivery::POKE;
1026                 } else {
1027                         $notify_type = Delivery::POST;
1028                 }
1029
1030                 // Filling item related side tables
1031                 if (!empty($item['attach'])) {
1032                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1033                 }
1034
1035                 if (empty($item['event-id'])) {
1036                         unset($item['event-id']);
1037
1038                         $ev = Event::fromBBCode($item['body']);
1039                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1040                                 Logger::info('Event found.');
1041                                 $ev['cid']       = $item['contact-id'];
1042                                 $ev['uid']       = $item['uid'];
1043                                 $ev['uri']       = $item['uri'];
1044                                 $ev['edited']    = $item['edited'];
1045                                 $ev['private']   = $item['private'];
1046                                 $ev['guid']      = $item['guid'];
1047                                 $ev['plink']     = $item['plink'];
1048                                 $ev['network']   = $item['network'];
1049                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1050                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1051                                 $ev['source']    = $item['source'] ?? '';
1052
1053                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1054                                 if (DBA::isResult($event)) {
1055                                         $ev['id'] = $event['id'];
1056                                 }
1057
1058                                 $event_id = Event::store($ev);
1059                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1060
1061                                 Logger::info('Event was stored', ['id' => $event_id]);
1062                         }
1063                 }
1064
1065                 if (empty($item['causer-id'])) {
1066                         unset($item['causer-id']);
1067                 }
1068
1069                 Post::insert($item['uri-id'], $item);
1070
1071                 if ($item['gravity'] == GRAVITY_PARENT) {
1072                         Post\Thread::insert($item['uri-id'], $item);
1073                 }
1074
1075                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1076                         Post\Content::insert($item['uri-id'], $item);
1077                 }
1078
1079                 // Create Diaspora signature
1080                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1081                         $signed = Diaspora::createCommentSignature($item);
1082                         if (!empty($signed)) {
1083                                 $item['diaspora_signed_text'] = json_encode($signed);
1084                         }
1085                 }
1086
1087                 if (!empty($item['diaspora_signed_text'])) {
1088                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1089                 }
1090
1091                 // Attached file links
1092                 if (!empty($item['file'])) {
1093                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1094                 }
1095
1096                 // Delivery relevant data
1097                 $delivery_data = Post\DeliveryData::extractFields($item);
1098
1099                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1100                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1101                 }
1102
1103                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1104                 if (!Tag::existsForPost($item['uri-id'])) {
1105                         Tag::storeFromBody($item['uri-id'], $item['body']);
1106                 }
1107
1108                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1109                 if (Post::exists($condition)) {
1110                         Logger::notice('Item is already inserted - aborting', $condition);
1111                         return 0;
1112                 }
1113
1114                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1115                 if (!$post_user_id) {
1116                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1117                         return 0;
1118                 }
1119
1120                 if ($item['gravity'] == GRAVITY_PARENT) {
1121                         $item['post-user-id'] = $post_user_id;
1122                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1123                 }
1124
1125                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1126
1127                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1128                 if (!DBA::isResult($posted_item)) {
1129                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1130                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1131                         self::spool($orig_item);
1132                         return 0;
1133                 }
1134
1135                 // update the commented timestamp on the parent
1136                 if (DI::config()->get('system', 'like_no_comment')) {
1137                         // Update when it is a comment
1138                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1139                 } else {
1140                         // Update when it isn't a follow or tag verb
1141                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1142                 }
1143
1144                 if ($update_commented) {
1145                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1146                 } else {
1147                         $fields = ['changed' => DateTimeFormat::utcNow()];
1148                 }
1149
1150                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1151
1152                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1153                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1154                         // Get the user information for the logging
1155                         $user = User::getById($uid);
1156
1157                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1158                         return 0;
1159                 }
1160
1161                 if ($notify) {
1162                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1163                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1164                         }
1165                         Hook::callAll('post_local_end', $posted_item);
1166                 } else {
1167                         Hook::callAll('post_remote_end', $posted_item);
1168                 }
1169
1170                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1171                         self::addShadow($post_user_id);
1172                 } else {
1173                         self::addShadowPost($post_user_id);
1174                 }
1175
1176                 self::updateContact($posted_item);
1177
1178                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1179
1180                 // Distribute items to users who subscribed to their tags
1181                 self::distributeByTags($posted_item);
1182
1183                 // Automatically reshare the item if the "remote_self" option is selected
1184                 self::autoReshare($posted_item);
1185
1186                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1187
1188                 if ($transmit) {
1189                         // Don't relay participation messages
1190                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1191                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1192                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1193                                 $transmit = false;
1194                         }
1195                 }
1196
1197                 if ($transmit) {
1198                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1199                 }
1200
1201                 return $post_user_id;
1202         }
1203
1204         /**
1205          * Change the owner of a parent item if it had been shared by a forum
1206          *
1207          * (public) forum posts in the new format consist of the regular post by the author
1208          * followed by an announce message sent from the forum account.
1209          * Changing the owner helps in grouping forum posts.
1210          *
1211          * @param array $item
1212          * @return void
1213          */
1214         private static function setOwnerforResharedItem(array $item)
1215         {
1216                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1217                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1218                 if (!DBA::isResult($parent)) {
1219                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1220                         return;
1221                 }
1222
1223                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1224                 if (!DBA::isResult($author)) {
1225                         Logger::error('Author not found', ['id' => $item['author-id']]);
1226                         return;
1227                 }
1228
1229                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1230                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1231                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1232                         return;
1233                 }
1234
1235                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1236                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1237                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1238                                 return;
1239                         }
1240
1241                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1242                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1243                                 return;
1244                         }
1245                 }
1246
1247                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1248                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1249         }
1250
1251         /**
1252          * Distribute the given item to users who subscribed to their tags
1253          *
1254          * @param array $item     Processed item
1255          */
1256         private static function distributeByTags(array $item)
1257         {
1258                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1259                         return;
1260                 }
1261
1262                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1263                 foreach ($uids as $uid) {
1264                         if (Contact::isSharing($item['author-id'], $uid)) {
1265                                 $fields = [];
1266                         } else {
1267                                 $fields = ['post-reason' => self::PR_TAG];
1268                         }
1269
1270                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1271                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1272                 }
1273         }
1274
1275         /**
1276          * Distributes public items to the receivers
1277          *
1278          * @param integer $itemid      Item ID that should be added
1279          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1280          * @throws \Exception
1281          */
1282         public static function distribute($itemid, $signed_text = '')
1283         {
1284                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1285                 $parent = Post::selectFirst(['owner-id'], $condition);
1286                 if (!DBA::isResult($parent)) {
1287                         Logger::warning('Item not found', ['condition' => $condition]);
1288                         return;
1289                 }
1290
1291                 // Only distribute public items from native networks
1292                 $condition = ['id' => $itemid, 'uid' => 0,
1293                         'network' => array_merge(Protocol::FEDERATED ,['']),
1294                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1295                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1296                 if (!DBA::isResult($item)) {
1297                         Logger::warning('Item not found', ['condition' => $condition]);
1298                         return;
1299                 }
1300
1301                 $origin = $item['origin'];
1302
1303                 $users = [];
1304
1305                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1306                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1307                 if (!DBA::isResult($owner)) {
1308                         return;
1309                 }
1310
1311                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1312                 $contacts = DBA::select('contact', ['uid'], $condition);
1313                 while ($contact = DBA::fetch($contacts)) {
1314                         if ($contact['uid'] == 0) {
1315                                 continue;
1316                         }
1317
1318                         $users[$contact['uid']] = $contact['uid'];
1319                 }
1320                 DBA::close($contacts);
1321
1322                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1323                 $contacts = DBA::select('contact', ['uid'], $condition);
1324                 while ($contact = DBA::fetch($contacts)) {
1325                         if ($contact['uid'] == 0) {
1326                                 continue;
1327                         }
1328
1329                         $users[$contact['uid']] = $contact['uid'];
1330                 }
1331                 DBA::close($contacts);
1332
1333                 if (!empty($owner['alias'])) {
1334                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1335                         $contacts = DBA::select('contact', ['uid'], $condition);
1336                         while ($contact = DBA::fetch($contacts)) {
1337                                 if ($contact['uid'] == 0) {
1338                                         continue;
1339                                 }
1340
1341                                 $users[$contact['uid']] = $contact['uid'];
1342                         }
1343                         DBA::close($contacts);
1344                 }
1345
1346                 $origin_uid = 0;
1347
1348                 if ($item['uri-id'] != $item['parent-uri-id']) {
1349                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1350                         while ($parent = Post::fetch($parents)) {
1351                                 $users[$parent['uid']] = $parent['uid'];
1352                                 if ($parent['origin'] && !$origin) {
1353                                         $origin_uid = $parent['uid'];
1354                                 }
1355                         }
1356                         DBA::close($parents);
1357                 }
1358
1359                 foreach ($users as $uid) {
1360                         if ($origin_uid == $uid) {
1361                                 $item['diaspora_signed_text'] = $signed_text;
1362                         }
1363                         self::storeForUser($item, $uid);
1364                 }
1365         }
1366
1367         /**
1368          * Store a public item defined by their URI-ID for the given users
1369          *
1370          * @param integer $uri_id     URI-ID of the given item
1371          * @param integer $uid        The user that will receive the item entry
1372          * @param array   $fields     Additional fields to be stored
1373          * @param integer $source_uid User id of the source post
1374          * @return integer stored item id
1375          */
1376         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1377         {
1378                 if ($uid == $source_uid) {
1379                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1380                         return 0;
1381                 }
1382
1383                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1384                 if (!DBA::isResult($item)) {
1385                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1386                         return 0;
1387                 }
1388
1389                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1390                         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']]);
1391                         return 0;
1392                 }
1393
1394                 $item['post-reason'] = self::PR_STORED;
1395
1396                 $item = array_merge($item, $fields);
1397
1398                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1399
1400                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1401                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') &&
1402                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1403                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1404                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1405                         return 0;
1406                 }
1407
1408                 if ((($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1409                         // Only do an auto complete with the source uid "0" to prevent privavy problems
1410                         $causer = $item['causer-id'] ?: $item['author-id'];
1411                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED]);
1412                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1413                 }
1414
1415                 $stored = self::storeForUser($item, $uid);
1416                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1417                 return $stored;
1418         }
1419
1420         /**
1421          * Store a public item array for the given users
1422          *
1423          * @param array   $item   The item entry that will be stored
1424          * @param integer $uid    The user that will receive the item entry
1425          * @return integer stored item id
1426          * @throws \Exception
1427          */
1428         private static function storeForUser(array $item, int $uid)
1429         {
1430                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1431                         if (!empty($item['event-id'])) {
1432                                 $post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1433                                 if (!empty($post['event-id'])) {
1434                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1435                                         if (!empty($event)) {
1436                                                 $ret = DBA::update('event', $event, ['id' => $post['event-id']]);
1437                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $post['event-id'], 'ret' => $ret]);
1438                                         }
1439                                 }
1440                         }
1441                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1442                         return 0;
1443                 }
1444
1445                 unset($item['id']);
1446                 unset($item['mention']);
1447                 unset($item['starred']);
1448                 unset($item['unseen']);
1449                 unset($item['psid']);
1450                 unset($item['pinned']);
1451                 unset($item['ignored']);
1452                 unset($item['pubmail']);
1453                 unset($item['forum_mode']);
1454
1455                 unset($item['event-id']);
1456                 unset($item['hidden']);
1457                 unset($item['notification-type']);
1458
1459                 $item['uid'] = $uid;
1460                 $item['origin'] = 0;
1461                 $item['wall'] = 0;
1462
1463                 if ($item['gravity'] == GRAVITY_PARENT) {
1464                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1465                 } else {
1466                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1467                 }
1468
1469                 if (!empty($contact['id'])) {
1470                         $item['contact-id'] = $contact['id'];
1471                 } else {
1472                         // Shouldn't happen at all
1473                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1474                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1475                         if (!DBA::isResult($self)) {
1476                                 // Shouldn't happen even less
1477                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1478                                 return 0;
1479                         }
1480                         $item['contact-id'] = $self['id'];
1481                 }
1482
1483                 $notify = false;
1484                 if ($item['gravity'] == GRAVITY_PARENT) {
1485                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1486                         if (DBA::isResult($contact)) {
1487                                 $notify = self::isRemoteSelf($contact, $item);
1488                         }
1489                 }
1490
1491                 $distributed = self::insert($item, $notify);
1492
1493                 if (!$distributed) {
1494                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1495                 } else {
1496                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1497                 }
1498                 return $distributed;
1499         }
1500
1501         /**
1502          * Add a shadow entry for a given item id that is a thread starter
1503          *
1504          * We store every public item entry additionally with the user id "0".
1505          * This is used for the community page and for the search.
1506          * It is planned that in the future we will store public item entries only once.
1507          *
1508          * @param integer $itemid Item ID that should be added
1509          * @throws \Exception
1510          */
1511         private static function addShadow($itemid)
1512         {
1513                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1514                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1515                 $item = Post::selectFirst($fields, $condition);
1516
1517                 if (!DBA::isResult($item)) {
1518                         return;
1519                 }
1520
1521                 // is it already a copy?
1522                 if (($itemid == 0) || ($item['uid'] == 0)) {
1523                         return;
1524                 }
1525
1526                 // Is it a visible public post?
1527                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1528                         return;
1529                 }
1530
1531                 // is it an entry from a connector? Only add an entry for natively connected networks
1532                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1533                         return;
1534                 }
1535
1536                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1537                         return;
1538                 }
1539
1540                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1541
1542                 if (DBA::isResult($item)) {
1543                         // Preparing public shadow (removing user specific data)
1544                         $item['uid'] = 0;
1545                         unset($item['id']);
1546                         unset($item['parent']);
1547                         unset($item['wall']);
1548                         unset($item['mention']);
1549                         unset($item['origin']);
1550                         unset($item['starred']);
1551                         unset($item['postopts']);
1552                         unset($item['inform']);
1553                         unset($item['post-reason']);
1554                         if ($item['uri-id'] == $item['parent-uri-id']) {
1555                                 $item['contact-id'] = $item['owner-id'];
1556                         } else {
1557                                 $item['contact-id'] = $item['author-id'];
1558                         }
1559
1560                         $public_shadow = self::insert($item);
1561
1562                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1563                 }
1564         }
1565
1566         /**
1567          * Add a shadow entry for a given item id that is a comment
1568          *
1569          * This function does the same like the function above - but for comments
1570          *
1571          * @param integer $itemid Item ID that should be added
1572          * @throws \Exception
1573          */
1574         private static function addShadowPost($itemid)
1575         {
1576                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1577                 if (!DBA::isResult($item)) {
1578                         return;
1579                 }
1580
1581                 // Is it a toplevel post?
1582                 if ($item['gravity'] == GRAVITY_PARENT) {
1583                         self::addShadow($itemid);
1584                         return;
1585                 }
1586
1587                 // Is this a shadow entry?
1588                 if ($item['uid'] == 0) {
1589                         return;
1590                 }
1591
1592                 // Is there a shadow parent?
1593                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1594                         return;
1595                 }
1596
1597                 // Is there already a shadow entry?
1598                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1599                         return;
1600                 }
1601
1602                 // Save "origin" and "parent" state
1603                 $origin = $item['origin'];
1604                 $parent = $item['parent'];
1605
1606                 // Preparing public shadow (removing user specific data)
1607                 $item['uid'] = 0;
1608                 unset($item['id']);
1609                 unset($item['parent']);
1610                 unset($item['wall']);
1611                 unset($item['mention']);
1612                 unset($item['origin']);
1613                 unset($item['starred']);
1614                 unset($item['postopts']);
1615                 unset($item['inform']);
1616                 unset($item['post-reason']);
1617                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1618
1619                 $public_shadow = self::insert($item);
1620
1621                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1622
1623                 // If this was a comment to a Diaspora post we don't get our comment back.
1624                 // This means that we have to distribute the comment by ourselves.
1625                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1626                         self::distribute($public_shadow);
1627                 }
1628         }
1629
1630         /**
1631          * Adds a language specification in a "language" element of given $arr.
1632          * Expects "body" element to exist in $arr.
1633          *
1634          * @param array $item
1635          * @return string detected language
1636          * @throws \Text_LanguageDetect_Exception
1637          */
1638         private static function getLanguage(array $item)
1639         {
1640                 if (!empty($item['language'])) {
1641                         return $item['language'];
1642                 }
1643
1644                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1645                         return '';
1646                 }
1647
1648                 // Convert attachments to links
1649                 $naked_body = BBCode::removeAttachment($item['body']);
1650                 if (empty($naked_body)) {
1651                         return '';
1652                 }
1653
1654                 // Remove links and pictures
1655                 $naked_body = BBCode::removeLinks($naked_body);
1656
1657                 // Convert the title and the body to plain text
1658                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1659
1660                 // Remove possibly remaining links
1661                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1662
1663                 if (empty($naked_body)) {
1664                         return '';
1665                 }
1666
1667                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1668                 // See https://github.com/friendica/friendica/issues/10511
1669                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1670                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1671                 $availableLanguages['fa'] = 'fa';
1672
1673                 $ld = new Language($availableLanguages);
1674                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1675                 if (is_array($languages)) {
1676                         return json_encode($languages);
1677                 }
1678
1679                 return '';
1680         }
1681
1682         public static function getLanguageMessage(array $item)
1683         {
1684                 $iso639 = new \Matriphe\ISO639\ISO639;
1685
1686                 $used_languages = '';
1687                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1688                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1689                 }
1690                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1691                 return $used_languages;
1692         }
1693
1694         /**
1695          * Creates an unique guid out of a given uri
1696          *
1697          * @param string $uri uri of an item entry
1698          * @param string $host hostname for the GUID prefix
1699          * @return string unique guid
1700          */
1701         public static function guidFromUri($uri, $host)
1702         {
1703                 // Our regular guid routine is using this kind of prefix as well
1704                 // We have to avoid that different routines could accidentally create the same value
1705                 $parsed = parse_url($uri);
1706
1707                 // We use a hash of the hostname as prefix for the guid
1708                 $guid_prefix = hash("crc32", $host);
1709
1710                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1711                 unset($parsed["scheme"]);
1712
1713                 // Glue it together to be able to make a hash from it
1714                 $host_id = implode("/", $parsed);
1715
1716                 // We could use any hash algorithm since it isn't a security issue
1717                 $host_hash = hash("ripemd128", $host_id);
1718
1719                 return $guid_prefix.$host_hash;
1720         }
1721
1722         /**
1723          * generate an unique URI
1724          *
1725          * @param integer $uid  User id
1726          * @param string  $guid An existing GUID (Otherwise it will be generated)
1727          *
1728          * @return string
1729          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1730          */
1731         public static function newURI($uid, $guid = "")
1732         {
1733                 if ($guid == "") {
1734                         $guid = System::createUUID();
1735                 }
1736
1737                 return DI::baseUrl()->get() . '/objects/' . $guid;
1738         }
1739
1740         /**
1741          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1742          *
1743          * This can be used to filter for inactive contacts.
1744          * Only do this for public postings to avoid privacy problems, since poco data is public.
1745          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1746          *
1747          * @param array $arr Contains the just posted item record
1748          * @throws \Exception
1749          */
1750         private static function updateContact($arr)
1751         {
1752                 // Unarchive the author
1753                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1754                 if (DBA::isResult($contact)) {
1755                         Contact::unmarkForArchival($contact);
1756                 }
1757
1758                 // Unarchive the contact if it's not our own contact
1759                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1760                 if (DBA::isResult($contact)) {
1761                         Contact::unmarkForArchival($contact);
1762                 }
1763
1764                 /// @todo On private posts we could obfuscate the date
1765                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1766
1767                 // Is it a forum? Then we don't care about the rules from above
1768                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1769                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1770                                 $update = true;
1771                         }
1772                 }
1773
1774                 if ($update) {
1775                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1776                         // So we have to ensure to only update the last item when it had been our own post,
1777                         // or it had been done by a "regular" contact.
1778                         if (!empty($arr['wall'])) {
1779                                 $condition = ['id' => $arr['contact-id']];
1780                         } else {
1781                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1782                         }
1783                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1784                 }
1785                 // Now do the same for the system wide contacts with uid=0
1786                 if ($arr['private'] != self::PRIVATE) {
1787                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1788                                 ['id' => $arr['owner-id']]);
1789
1790                         if ($arr['owner-id'] != $arr['author-id']) {
1791                                 Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1792                                         ['id' => $arr['author-id']]);
1793                         }
1794                 }
1795         }
1796
1797         public static function setHashtags($body)
1798         {
1799                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1800                         $tags = BBCode::getTags($body);
1801
1802                         // No hashtags?
1803                         if (!count($tags)) {
1804                                 return $body;
1805                         }
1806
1807                         // This sorting is important when there are hashtags that are part of other hashtags
1808                         // Otherwise there could be problems with hashtags like #test and #test2
1809                         // Because of this we are sorting from the longest to the shortest tag.
1810                         usort($tags, function ($a, $b) {
1811                                 return strlen($b) <=> strlen($a);
1812                         });
1813
1814                         $URLSearchString = "^\[\]";
1815
1816                         // All hashtags should point to the home server if "local_tags" is activated
1817                         if (DI::config()->get('system', 'local_tags')) {
1818                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1819                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1820                         }
1821
1822                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1823                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1824                                 function ($match) {
1825                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1826                                 }, $body);
1827
1828                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1829                                 function ($match) {
1830                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1831                                 }, $body);
1832
1833                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1834                                 function ($match) {
1835                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1836                                 }, $body);
1837
1838                         // Repair recursive urls
1839                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1840                                 "&num;$2", $body);
1841
1842                         foreach ($tags as $tag) {
1843                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1844                                         continue;
1845                                 }
1846
1847                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1848                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1849
1850                                 $body = str_replace($tag, $newtag, $body);
1851                         }
1852
1853                         // Convert back the masked hashtags
1854                         $body = str_replace("&num;", "#", $body);
1855
1856                         return $body;
1857                 });
1858
1859                 return $body;
1860         }
1861
1862         /**
1863          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1864          *
1865          * @param int $uid
1866          * @param int $item_id
1867          * @return boolean true if item was deleted, else false
1868          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1869          * @throws \ImagickException
1870          */
1871         private static function tagDeliver($uid, $item_id)
1872         {
1873                 $mention = false;
1874
1875                 $owner = User::getOwnerDataById($uid);
1876                 if (!DBA::isResult($owner)) {
1877                         Logger::warning('User not found, quitting.', ['uid' => $uid]);
1878                         return false;
1879                 }
1880
1881                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
1882                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
1883                         return false;
1884                 }
1885
1886                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
1887                 if (!DBA::isResult($item)) {
1888                         Logger::warning('Post not found, quitting.', ['id' => $item_id]);
1889                         return false;
1890                 }
1891
1892                 if ($item['wall'] || $item['origin'] || ($item['gravity'] != GRAVITY_PARENT)) {
1893                         Logger::debug('Wall item, origin item or no parent post, quitting here.', ['wall' => $item['wall'], 'origin' => $item['origin'], 'gravity' => $item['gravity'], 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1894                         return false;
1895                 }
1896
1897                 $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1898                 foreach ($tags as $tag) {
1899                         if (Strings::compareLink($owner['url'], $tag['url'])) {
1900                                 $mention = true;
1901                                 Logger::info('Mention found in tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1902                         }
1903                 }
1904
1905                 // This check can most likely be removed since we always are having the tags
1906                 if (!$mention) {
1907                         $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1908                         if ($cnt) {
1909                                 foreach ($matches as $mtch) {
1910                                         if (Strings::compareLink($owner['url'], $mtch[1])) {
1911                                                 $mention = true;
1912                                                 Logger::notice('Mention found in body.', ['mention' => $mtch[2], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1913                                         }
1914                                 }
1915                         }
1916                 }
1917
1918                 if (!$mention) {
1919                         Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1920                         Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1921                         return true;
1922                 }
1923
1924                 $arr = ['item' => $item, 'user' => $owner];
1925
1926                 Hook::callAll('tagged', $arr);
1927
1928                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1929
1930                 self::performActivity($item['id'], 'announce', $uid);
1931
1932                 /**
1933                  * All the following lines are only needed for private forums and compatibility to older systems without AP support.
1934                  * A possible way would be that the followers list of a forum would always be readable by all followers.
1935                  * So this would mean that the comment distribution could be done exactly for the intended audience.
1936                  * Or possibly we could store the receivers that had been in the "announce" message above and use this.
1937                  */
1938
1939                 // also reset all the privacy bits to the forum default permissions
1940                 if ($owner['allow_cid'] || $owner['allow_gid'] || $owner['deny_cid'] || $owner['deny_gid']) {
1941                         $private = self::PRIVATE;
1942                 } elseif (DI::pConfig()->get($owner['uid'], 'system', 'unlisted')) {
1943                         $private = self::UNLISTED;
1944                 } else {
1945                         $private = self::PUBLIC;
1946                 }
1947
1948                 $permissionSet = DI::permissionSet()->selectOrCreate(
1949                         DI::permissionSetFactory()->createFromString(
1950                                 $owner['uid'],
1951                                 $owner['allow_cid'],
1952                                 $owner['allow_gid'],
1953                                 $owner['deny_cid'],
1954                                 $owner['deny_gid']
1955                         ));
1956
1957                 $forum_mode = ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? 2 : 1;
1958
1959                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $owner['id'],
1960                         'owner-id' => Contact::getPublicIdByUserId($uid), 'private' => $private, 'psid' => $permissionSet->id];
1961                 self::update($fields, ['id' => $item['id']]);
1962
1963                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, (int)$item['uri-id'], (int)$item['uid']);
1964
1965                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1966                 return false;
1967         }
1968
1969         /**
1970          * Automatically reshare the item if the "remote_self" option is selected
1971          *
1972          * @param array $item
1973          * @return void
1974          */
1975         private static function autoReshare(array $item)
1976         {
1977                 if ($item['gravity'] != GRAVITY_PARENT) {
1978                         return;
1979                 }
1980
1981                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
1982                         return;
1983                 }
1984
1985                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1986                         return;
1987                 }
1988
1989                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1990
1991                 self::performActivity($item['id'], 'announce', $item['uid']);
1992         }
1993
1994         public static function isRemoteSelf($contact, &$datarray)
1995         {
1996                 if (!$contact['remote_self']) {
1997                         return false;
1998                 }
1999
2000                 // Prevent the forwarding of posts that are forwarded
2001                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2002                         Logger::info('Already forwarded');
2003                         return false;
2004                 }
2005
2006                 // Prevent to forward already forwarded posts
2007                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2008                         Logger::info('Already forwarded (second test)');
2009                         return false;
2010                 }
2011
2012                 // Only forward posts
2013                 if ($datarray["verb"] != Activity::POST) {
2014                         Logger::info('No post');
2015                         return false;
2016                 }
2017
2018                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2019                         Logger::info('Not public');
2020                         return false;
2021                 }
2022
2023                 $datarray2 = $datarray;
2024                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2025                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2026                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2027                                         ['uid' => $contact['uid'], 'self' => true]);
2028                         if (DBA::isResult($self)) {
2029                                 $datarray['contact-id'] = $self["id"];
2030
2031                                 $datarray['owner-name'] = $self["name"];
2032                                 $datarray['owner-link'] = $self["url"];
2033                                 $datarray['owner-avatar'] = $self["thumb"];
2034
2035                                 $datarray['author-name']   = $datarray['owner-name'];
2036                                 $datarray['author-link']   = $datarray['owner-link'];
2037                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2038
2039                                 unset($datarray['edited']);
2040
2041                                 unset($datarray['network']);
2042                                 unset($datarray['owner-id']);
2043                                 unset($datarray['author-id']);
2044                         }
2045
2046                         if ($contact['network'] != Protocol::FEED) {
2047                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2048                                 $datarray["guid"] = System::createUUID();
2049                                 unset($datarray["plink"]);
2050                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2051                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2052                                 $datarray["extid"] = Protocol::DFRN;
2053                                 $urlpart = parse_url($datarray2['author-link']);
2054                                 $datarray["app"] = $urlpart["host"];
2055                                 if (!empty($old_uri_id)) {
2056                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2057                                 }
2058
2059                                 unset($datarray["parent-uri"]);
2060                                 unset($datarray["thr-parent"]);
2061                         } else {
2062                                 $datarray['private'] = self::PUBLIC;
2063                         }
2064                 }
2065
2066                 if ($contact['network'] != Protocol::FEED) {
2067                         // Store the original post
2068                         $result = self::insert($datarray2);
2069                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2070                 } else {
2071                         $datarray["app"] = "Feed";
2072                         $result = true;
2073                 }
2074
2075                 return (bool)$result;
2076         }
2077
2078         /**
2079          *
2080          * @param string $s
2081          * @param int    $uid
2082          * @param array  $item
2083          * @param int    $cid
2084          * @return string
2085          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2086          * @throws \ImagickException
2087          */
2088         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2089         {
2090                 if (DI::config()->get('system', 'disable_embedded')) {
2091                         return $s;
2092                 }
2093
2094                 Logger::info('check for photos');
2095                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2096
2097                 $orig_body = $s;
2098                 $new_body = '';
2099
2100                 $img_start = strpos($orig_body, '[img');
2101                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2102                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2103
2104                 while (($img_st_close !== false) && ($img_len !== false)) {
2105                         $img_st_close++; // make it point to AFTER the closing bracket
2106                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2107
2108                         Logger::info('found photo', ['image' => $image]);
2109
2110                         if (stristr($image, $site . '/photo/')) {
2111                                 // Only embed locally hosted photos
2112                                 $replace = false;
2113                                 $i = basename($image);
2114                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2115                                 $x = strpos($i, '-');
2116
2117                                 if ($x) {
2118                                         $res = substr($i, $x + 1);
2119                                         $i = substr($i, 0, $x);
2120                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2121                                         if (DBA::isResult($photo)) {
2122                                                 /*
2123                                                  * Check to see if we should replace this photo link with an embedded image
2124                                                  * 1. No need to do so if the photo is public
2125                                                  * 2. If there's a contact-id provided, see if they're in the access list
2126                                                  *    for the photo. If so, embed it.
2127                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2128                                                  *    permissions, regardless of order but first check to see if they're an exact
2129                                                  *    match to save some processing overhead.
2130                                                  */
2131                                                 if (self::hasPermissions($photo)) {
2132                                                         if ($cid) {
2133                                                                 $recips = self::enumeratePermissions($photo);
2134                                                                 if (in_array($cid, $recips)) {
2135                                                                         $replace = true;
2136                                                                 }
2137                                                         } elseif ($item) {
2138                                                                 if (self::samePermissions($uid, $item, $photo)) {
2139                                                                         $replace = true;
2140                                                                 }
2141                                                         }
2142                                                 }
2143                                                 if ($replace) {
2144                                                         $photo_img = Photo::getImageForPhoto($photo);
2145                                                         // If a custom width and height were specified, apply before embedding
2146                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2147                                                                 Logger::info('scaling photo');
2148
2149                                                                 $width = intval($match[1]);
2150                                                                 $height = intval($match[2]);
2151
2152                                                                 $photo_img->scaleDown(max($width, $height));
2153                                                         }
2154
2155                                                         $data = $photo_img->asString();
2156                                                         $type = $photo_img->getType();
2157
2158                                                         Logger::info('replacing photo');
2159                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2160                                                         Logger::debug('replaced', ['image' => $image]);
2161                                                 }
2162                                         }
2163                                 }
2164                         }
2165
2166                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2167                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2168                         if ($orig_body === false) {
2169                                 $orig_body = '';
2170                         }
2171
2172                         $img_start = strpos($orig_body, '[img');
2173                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2174                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2175                 }
2176
2177                 $new_body = $new_body . $orig_body;
2178
2179                 return $new_body;
2180         }
2181
2182         private static function hasPermissions($obj)
2183         {
2184                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2185                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2186         }
2187
2188         private static function samePermissions($uid, $obj1, $obj2)
2189         {
2190                 // first part is easy. Check that these are exactly the same.
2191                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2192                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2193                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2194                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2195                         return true;
2196                 }
2197
2198                 // This is harder. Parse all the permissions and compare the resulting set.
2199                 $recipients1 = self::enumeratePermissions($obj1);
2200                 $recipients2 = self::enumeratePermissions($obj2);
2201                 sort($recipients1);
2202                 sort($recipients2);
2203
2204                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2205                 return ($recipients1 == $recipients2);
2206         }
2207
2208         /**
2209          * Returns an array of contact-ids that are allowed to see this object
2210          *
2211          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2212          * @param bool  $check_dead Prunes unavailable contacts from the result
2213          * @return array
2214          * @throws \Exception
2215          */
2216         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2217         {
2218                 $aclFormater = DI::aclFormatter();
2219
2220                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2221                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2222                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2223                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2224                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2225                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2226                 $recipients   = array_diff($recipients, $deny);
2227                 return $recipients;
2228         }
2229
2230         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2231         {
2232                 if (!$uid || ($days < 1)) {
2233                         return;
2234                 }
2235
2236                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2237                         $uid, GRAVITY_PARENT];
2238
2239                 /*
2240                  * $expire_network_only = save your own wall posts
2241                  * and just expire conversations started by others
2242                  */
2243                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2244
2245                 if ($expire_network_only) {
2246                         $condition[0] .= " AND NOT `wall`";
2247                 }
2248
2249                 if ($network != "") {
2250                         $condition[0] .= " AND `network` = ?";
2251                         $condition[] = $network;
2252                 }
2253
2254                 $condition[0] .= " AND `received` < ?";
2255                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2256
2257                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2258
2259                 if (!DBA::isResult($items)) {
2260                         return;
2261                 }
2262
2263                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2264
2265                 // Forcing expiring of items - but not notes and marked items
2266                 if ($force) {
2267                         $expire_items = true;
2268                 }
2269
2270                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2271                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2272                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2273
2274                 $expired = 0;
2275
2276                 $priority = DI::config()->get('system', 'expire-notify-priority');
2277
2278                 while ($item = Post::fetch($items)) {
2279                         // don't expire filed items
2280                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2281                                 continue;
2282                         }
2283
2284                         // Only expire posts, not photos and photo comments
2285
2286                         if (!$expire_photos && !empty($item['resource-id'])) {
2287                                 continue;
2288                         } elseif (!$expire_starred && intval($item['starred'])) {
2289                                 continue;
2290                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2291                                 continue;
2292                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2293                                 continue;
2294                         }
2295
2296                         self::markForDeletionById($item['id'], $priority);
2297
2298                         ++$expired;
2299                 }
2300                 DBA::close($items);
2301                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2302         }
2303
2304         public static function firstPostDate($uid, $wall = false)
2305         {
2306                 $user = User::getById($uid, ['register_date']);
2307                 if (empty($user)) {
2308                         return false;
2309                 }
2310
2311                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2312                         $uid, $wall, $user['register_date']];
2313                 $params = ['order' => ['received' => false]];
2314                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2315                 if (DBA::isResult($thread)) {
2316                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2317                         return $postdate;
2318                 }
2319                 return false;
2320         }
2321
2322         /**
2323          * add/remove activity to an item
2324          *
2325          * Toggle activities as like,dislike,attend of an item
2326          *
2327          * @param int $item_id
2328          * @param string $verb
2329          *            Activity verb. One of
2330          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2331          *            attendno, unattendno, attendmaybe, unattendmaybe,
2332          *            announce, unannouce
2333          * @return bool
2334          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2335          * @throws \ImagickException
2336          * @hook  'post_local_end'
2337          *            array $arr
2338          *            'post_id' => ID of posted item
2339          */
2340         public static function performActivity(int $item_id, string $verb, int $uid)
2341         {
2342                 if (empty($uid)) {
2343                         return false;
2344                 }
2345
2346                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2347
2348                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2349                 if (!DBA::isResult($item)) {
2350                         Logger::notice('like: unknown item', ['id' => $item_id]);
2351                         return false;
2352                 }
2353
2354                 $uri_id = $item['uri-id'];
2355
2356                 if (!in_array($item['uid'], [0, $uid])) {
2357                         return false;
2358                 }
2359
2360                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2361                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2362                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2363                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2364                                 if (!DBA::isResult($item)) {
2365                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2366                                         return false;
2367                                 }
2368                         }
2369                 }
2370
2371                 // Retrieves the local post owner
2372                 $owner = User::getOwnerDataById($uid);
2373                 if (empty($owner)) {
2374                         Logger::info('Empty owner for user', ['uid' => $uid]);
2375                         return false;
2376                 }
2377
2378                 // Retrieve the current logged in user's public contact
2379                 $author_id = Contact::getIdForURL($owner['url']);
2380                 if (empty($author_id)) {
2381                         Logger::info('Empty public contact');
2382                         return false;
2383                 }
2384
2385                 $activity = null;
2386                 switch ($verb) {
2387                         case 'like':
2388                         case 'unlike':
2389                                 $activity = Activity::LIKE;
2390                                 break;
2391                         case 'dislike':
2392                         case 'undislike':
2393                                 $activity = Activity::DISLIKE;
2394                                 break;
2395                         case 'attendyes':
2396                         case 'unattendyes':
2397                                 $activity = Activity::ATTEND;
2398                                 break;
2399                         case 'attendno':
2400                         case 'unattendno':
2401                                 $activity = Activity::ATTENDNO;
2402                                 break;
2403                         case 'attendmaybe':
2404                         case 'unattendmaybe':
2405                                 $activity = Activity::ATTENDMAYBE;
2406                                 break;
2407                         case 'follow':
2408                         case 'unfollow':
2409                                 $activity = Activity::FOLLOW;
2410                                 break;
2411                         case 'announce':
2412                         case 'unannounce':
2413                                 $activity = Activity::ANNOUNCE;
2414                                 break;
2415                         default:
2416                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2417                                 return false;
2418                 }
2419
2420                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2421
2422                 // Enable activity toggling instead of on/off
2423                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2424
2425                 // Look for an existing verb row
2426                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2427                 if ($event_verb_flag) {
2428                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2429
2430                         // Translate to the index based activity index
2431                         $vids = [];
2432                         foreach ($verbs as $verb) {
2433                                 $vids[] = Verb::getID($verb);
2434                         }
2435                 } else {
2436                         $vids = Verb::getID($activity);
2437                 }
2438
2439                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2440                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2441                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2442
2443                 if (DBA::isResult($like_item)) {
2444                         /**
2445                          * Truth table for existing activities
2446                          *
2447                          * |          Inputs            ||      Outputs      |
2448                          * |----------------------------||-------------------|
2449                          * |  Mode  | Event | Same verb || Delete? | Return? |
2450                          * |--------|-------|-----------||---------|---------|
2451                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2452                          * | create |  Yes  |    No     ||   Yes   |   No    |
2453                          * | create |  No   |    Yes    ||   No    |   Yes   |
2454                          * | create |  No   |    No     ||        N/A†       |
2455                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2456                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2457                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2458                          * | delete |  No   |    No     ||        N/A†       |
2459                          * |--------|-------|-----------||---------|---------|
2460                          * |   A    |   B   |     C     || A xor C | !B or C |
2461                          *
2462                          * † Can't happen: It's impossible to find an existing non-event activity without
2463                          *                 the same verb because we are only looking for this single verb.
2464                          *
2465                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2466                          */
2467                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2468                                 self::markForDeletionById($like_item['id']);
2469                         }
2470
2471                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2472                                 return true;
2473                         }
2474                 }
2475
2476                 // No need to go further if we aren't creating anything
2477                 if ($mode == 'delete') {
2478                         return true;
2479                 }
2480
2481                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2482
2483                 $new_item = [
2484                         'guid'          => System::createUUID(),
2485                         'uri'           => self::newURI($item['uid']),
2486                         'uid'           => $item['uid'],
2487                         'contact-id'    => $owner['id'],
2488                         'wall'          => $item['wall'],
2489                         'origin'        => 1,
2490                         'network'       => Protocol::DFRN,
2491                         'protocol'      => Conversation::PARCEL_DIRECT,
2492                         'direction'     => Conversation::PUSH,
2493                         'gravity'       => GRAVITY_ACTIVITY,
2494                         'parent'        => $item['id'],
2495                         'thr-parent'    => $item['uri'],
2496                         'owner-id'      => $author_id,
2497                         'author-id'     => $author_id,
2498                         'body'          => $activity,
2499                         'verb'          => $activity,
2500                         'object-type'   => $objtype,
2501                         'allow_cid'     => $item['allow_cid'],
2502                         'allow_gid'     => $item['allow_gid'],
2503                         'deny_cid'      => $item['deny_cid'],
2504                         'deny_gid'      => $item['deny_gid'],
2505                         'visible'       => 1,
2506                         'unseen'        => 1,
2507                 ];
2508
2509                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2510                 if (!empty($signed)) {
2511                         $new_item['diaspora_signed_text'] = json_encode($signed);
2512                 }
2513
2514                 $new_item_id = self::insert($new_item);
2515
2516                 // If the parent item isn't visible then set it to visible
2517                 if (!$item['visible']) {
2518                         self::update(['visible' => true], ['id' => $item['id']]);
2519                 }
2520
2521                 $new_item['id'] = $new_item_id;
2522
2523                 Hook::callAll('post_local_end', $new_item);
2524
2525                 return true;
2526         }
2527
2528         /**
2529          * Fetch the SQL condition for the given user id
2530          *
2531          * @param integer $owner_id User ID for which the permissions should be fetched
2532          * @return array condition
2533          */
2534         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2535         {
2536                 $local_user = local_user();
2537                 $remote_user = Session::getRemoteContactID($owner_id);
2538
2539                 // default permissions - anonymous user
2540                 $condition = ["`private` != ?", self::PRIVATE];
2541
2542                 if ($local_user && ($local_user == $owner_id)) {
2543                         // Profile owner - everything is visible
2544                         $condition = [];
2545                 } elseif ($remote_user) {
2546                          // Authenticated visitor - fetch the matching permissionsets
2547                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2548                         if (!empty($set)) {
2549                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2550                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2551                                         self::PRIVATE, self::PRIVATE];
2552                                 $condition = array_merge($condition, $permissionSets->column('id'));
2553                         }
2554                 }
2555
2556                 return $condition;
2557         }
2558
2559         /**
2560          * Get a permission SQL string for the given user
2561          *
2562          * @param int $owner_id
2563          * @param string $table
2564          * @return string
2565          */
2566         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2567         {
2568                 $local_user = local_user();
2569                 $remote_user = Session::getRemoteContactID($owner_id);
2570
2571                 if (!empty($table)) {
2572                         $table = DBA::quoteIdentifier($table) . '.';
2573                 }
2574
2575                 /*
2576                  * Construct permissions
2577                  *
2578                  * default permissions - anonymous user
2579                  */
2580                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2581
2582                 // Profile owner - everything is visible
2583                 if ($local_user && ($local_user == $owner_id)) {
2584                         $sql = '';
2585                 } elseif ($remote_user) {
2586                         /*
2587                          * Authenticated visitor. Unless pre-verified,
2588                          * check that the contact belongs to this $owner_id
2589                          * and load the groups the visitor belongs to.
2590                          * If pre-verified, the caller is expected to have already
2591                          * done this and passed the groups into this function.
2592                          */
2593                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2594
2595                         if (!empty($set)) {
2596                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2597                         } else {
2598                                 $sql_set = '';
2599                         }
2600
2601                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2602                 }
2603
2604                 return $sql;
2605         }
2606
2607         /**
2608          * get translated item type
2609          *
2610          * @param array                $item
2611          * @param \Friendica\Core\L10n $l10n
2612          * @return string
2613          */
2614         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2615         {
2616                 if (!empty($item['event-id'])) {
2617                         return $l10n->t('event');
2618                 } elseif (!empty($item['resource-id'])) {
2619                         return $l10n->t('photo');
2620                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2621                         return $l10n->t('activity');
2622                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2623                         return $l10n->t('comment');
2624                 }
2625
2626                 return $l10n->t('post');
2627         }
2628
2629         /**
2630          * Sets the "rendered-html" field of the provided item
2631          *
2632          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2633          *
2634          * @param array $item
2635          *
2636          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2637          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2638          */
2639         public static function putInCache(&$item)
2640         {
2641                 // Save original body to prevent addons to modify it
2642                 $body = $item['body'];
2643
2644                 $rendered_hash = $item['rendered-hash'] ?? '';
2645                 $rendered_html = $item['rendered-html'] ?? '';
2646
2647                 if ($rendered_hash == ''
2648                         || $rendered_html == ''
2649                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2650                         || DI::config()->get('system', 'ignore_cache')
2651                 ) {
2652                         self::addRedirToImageTags($item);
2653
2654                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2655                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2656
2657                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2658                         Hook::callAll('put_item_in_cache', $hook_data);
2659                         $item['rendered-html'] = $hook_data['rendered-html'];
2660                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2661                         unset($hook_data);
2662
2663                         // Update if the generated values differ from the existing ones
2664                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2665                                 self::update(
2666                                         [
2667                                                 'rendered-html' => $item['rendered-html'],
2668                                                 'rendered-hash' => $item['rendered-hash']
2669                                         ],
2670                                         ['id' => $item['id']]
2671                                 );
2672                         }
2673                 }
2674
2675                 $item['body'] = $body;
2676         }
2677
2678         /**
2679          * Find any non-embedded images in private items and add redir links to them
2680          *
2681          * @param array &$item The field array of an item row
2682          */
2683         private static function addRedirToImageTags(array &$item)
2684         {
2685                 $app = DI::app();
2686
2687                 $matches = [];
2688                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2689                 if ($cnt) {
2690                         foreach ($matches as $mtch) {
2691                                 if (strpos($mtch[1], '/redir') !== false) {
2692                                         continue;
2693                                 }
2694
2695                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->getContactId()) && ($item['network'] == Protocol::DFRN)) {
2696                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2697                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2698                                 }
2699                         }
2700                 }
2701         }
2702
2703         /**
2704          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2705          * If attach is true, also add icons for item attachments.
2706          *
2707          * @param array   $item
2708          * @param boolean $attach
2709          * @param boolean $is_preview
2710          * @return string item body html
2711          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2712          * @throws \ImagickException
2713          * @hook  prepare_body_init item array before any work
2714          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2715          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2716          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2717          */
2718         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2719         {
2720                 $a = DI::app();
2721                 Hook::callAll('prepare_body_init', $item);
2722
2723                 // In order to provide theme developers more possibilities, event items
2724                 // are treated differently.
2725                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2726                         $ev = Event::getItemHTML($item);
2727                         return $ev;
2728                 }
2729
2730                 $tags = Tag::populateFromItem($item);
2731
2732                 $item['tags'] = $tags['tags'];
2733                 $item['hashtags'] = $tags['hashtags'];
2734                 $item['mentions'] = $tags['mentions'];
2735
2736                 $body = $item['body'] ?? '';
2737                 $shared = BBCode::fetchShareAttributes($body);
2738                 if (!empty($shared['guid'])) {
2739                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2740                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2741                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2742                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2743                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2744                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2745                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2746                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2747                 } else {
2748                         $shared_uri_id = 0;
2749                         $shared_links = [];
2750                 }
2751                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links);
2752                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2753
2754                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2755                 self::putInCache($item);
2756                 $item['body'] = $body;
2757                 $s = $item["rendered-html"];
2758
2759                 // Compile eventual content filter reasons
2760                 $filter_reasons = [];
2761                 if (!$is_preview && public_contact() != $item['author-id']) {
2762                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2763                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2764                         }
2765
2766                         $item['attachments'] = $attachments;
2767
2768                         $hook_data = [
2769                                 'item' => $item,
2770                                 'filter_reasons' => $filter_reasons
2771                         ];
2772                         Hook::callAll('prepare_body_content_filter', $hook_data);
2773                         $filter_reasons = $hook_data['filter_reasons'];
2774                         unset($hook_data);
2775                 }
2776
2777                 $hook_data = [
2778                         'item' => $item,
2779                         'html' => $s,
2780                         'preview' => $is_preview,
2781                         'filter_reasons' => $filter_reasons
2782                 ];
2783                 Hook::callAll('prepare_body', $hook_data);
2784                 $s = $hook_data['html'];
2785                 unset($hook_data);
2786
2787                 if (!$attach) {
2788                         // Replace the blockquotes with quotes that are used in mails.
2789                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2790                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2791                         return $s;
2792                 }
2793
2794                 if (!empty($shared_attachments)) {
2795                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2796                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2797                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2798                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2799                 }
2800
2801                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2802                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2803                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2804
2805                 // Map.
2806                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2807                         $x = Map::byCoordinates(trim($item['coord']));
2808                         if ($x) {
2809                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2810                         }
2811                 }
2812
2813                 // Replace friendica image url size with theme preference.
2814                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2815                         $ps = $a->getThemeInfoValue('item_image_size');
2816                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2817                 }
2818
2819                 $s = HTML::applyContentFilter($s, $filter_reasons);
2820
2821                 $hook_data = ['item' => $item, 'html' => $s];
2822                 Hook::callAll('prepare_body_final', $hook_data);
2823
2824                 return $hook_data['html'];
2825         }
2826
2827         /**
2828          * Check if the body contains a link
2829          *
2830          * @param string $body
2831          * @param string $url
2832          * @param int    $type
2833          * @return bool
2834          */
2835         public static function containsLink(string $body, string $url, int $type = 0)
2836         {
2837                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2838                 $urlparts = parse_url($url);
2839                 unset($urlparts['query']);
2840                 unset($urlparts['fragment']);
2841                 $url = Network::unparseURL($urlparts);
2842
2843                 // Remove media links to only search in embedded content
2844                 // @todo Check images for image link, audio for audio links, ...
2845                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2846                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2847                 }
2848
2849                 if (strpos($body, $url)) {
2850                         return true;
2851                 }
2852                 foreach ([0, 1, 2] as $size) {
2853                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2854                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2855                                 return true;
2856                         }
2857                 }
2858                 return false;
2859         }
2860
2861         /**
2862          * Replace visual attachments in the body
2863          *
2864          * @param array $attachments
2865          * @param string $body
2866          * @return string modified body
2867          */
2868         private static function replaceVisualAttachments(array $attachments, string $body)
2869         {
2870                 DI::profiler()->startRecording('rendering');
2871
2872                 foreach ($attachments['visual'] as $attachment) {
2873                         if (!empty($attachment['preview'])) {
2874                                 $body = str_replace($attachment['preview'], Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE), $body);
2875                         } elseif ($attachment['filetype'] == 'image') {
2876                                 $body = str_replace($attachment['url'], Post\Media::getUrlForId($attachment['id']), $body);
2877                         }
2878                 }
2879                 DI::profiler()->stopRecording();
2880                 return $body;
2881         }
2882
2883         /**
2884          * Add visual attachments to the content
2885          *
2886          * @param array $attachments
2887          * @param array $item
2888          * @param string $content
2889          * @return string modified content
2890          */
2891         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2892         {
2893                 DI::profiler()->startRecording('rendering');
2894                 $leading = '';
2895                 $trailing = '';
2896
2897                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2898                 foreach ($attachments['visual'] as $attachment) {
2899                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
2900                                 continue;
2901                         }
2902
2903                         if (!empty($attachment['preview'])) {
2904                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2905                         } else {
2906                                 $preview_url = '';
2907                         }
2908
2909                         if (($attachment['filetype'] == 'video')) {
2910                                 /// @todo Move the template to /content as well
2911                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2912                                         '$video' => [
2913                                                 'id'      => $attachment['id'],
2914                                                 'src'     => $attachment['url'],
2915                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2916                                                 'preview' => $preview_url,
2917                                                 'mime'    => $attachment['mimetype'],
2918                                         ],
2919                                 ]);
2920                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
2921                                         $leading .= $media;
2922                                 } else {
2923                                         $trailing .= $media;
2924                                 }
2925                         } elseif ($attachment['filetype'] == 'audio') {
2926                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2927                                         '$audio' => [
2928                                                 'id'     => $attachment['id'],
2929                                                 'src'    => $attachment['url'],
2930                                                 'name'   => $attachment['name'] ?: $attachment['url'],
2931                                                 'mime'   => $attachment['mimetype'],
2932                                         ],
2933                                 ]);
2934                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
2935                                         $leading .= $media;
2936                                 } else {
2937                                         $trailing .= $media;
2938                                 }
2939                         } elseif ($attachment['filetype'] == 'image') {
2940                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2941                                         '$image' => [
2942                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
2943                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
2944                                                 'attachment' => $attachment,
2945                                         ],
2946                                 ]);
2947                                 // On Diaspora posts the attached pictures are leading
2948                                 if ($item['network'] == Protocol::DIASPORA) {
2949                                         $leading .= $media;
2950                                 } else {
2951                                         $trailing .= $media;
2952                                 }
2953                         }
2954                 }
2955
2956                 if ($shared) {
2957                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
2958                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
2959                 } else {
2960                         if ($leading != '') {
2961                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
2962                         }
2963
2964                         if ($trailing != '') {
2965                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
2966                         }
2967                 }
2968
2969                 DI::profiler()->stopRecording();
2970                 return $content;
2971         }
2972
2973         /**
2974          * Add link attachment to the content
2975          *
2976          * @param array  $attachments
2977          * @param string $body
2978          * @param string $content
2979          * @param bool   $shared
2980          * @param array  $ignore_links A list of URLs to ignore
2981          * @return string modified content
2982          */
2983         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links)
2984         {
2985                 DI::profiler()->startRecording('rendering');
2986                 // Don't show a preview when there is a visual attachment (audio or video)
2987                 $types = array_column($attachments['visual'], 'type');
2988                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
2989
2990                 if (!empty($attachments['link'])) {
2991                         foreach ($attachments['link'] as $link) {
2992                                 $found = false;
2993                                 foreach ($ignore_links as $ignore_link) {
2994                                         if (Strings::compareLink($link['url'], $ignore_link)) {
2995                                                 $found = true;
2996                                         }
2997                                 }
2998                                 // @todo Judge between the links to use the one with most information
2999                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3000                                         (empty($attachment['name']) && !empty($link['name'])) ||
3001                                         (empty($attachment['description']) && !empty($link['description'])) ||
3002                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3003                                         $attachment = $link;
3004                                 }
3005                         }
3006                 }
3007
3008                 if (!empty($attachment)) {
3009                         $data = [
3010                                 'after' => '',
3011                                 'author_name' => $attachment['author-name'] ?? '',
3012                                 'author_url' =>  $attachment['author-url'] ?? '',
3013                                 'description' => $attachment['description'] ?? '',
3014                                 'image' => '',
3015                                 'preview' => '',
3016                                 'provider_name' => $attachment['publisher-name'] ?? '',
3017                                 'provider_url' => $attachment['publisher-url'] ?? '',
3018                                 'text' => '',
3019                                 'title' => $attachment['name'] ?? '',
3020                                 'type' => 'link',
3021                                 'url' => $attachment['url']];
3022
3023                         if ($preview && !empty($attachment['preview'])) {
3024                                 if ($attachment['preview-width'] >= 500) {
3025                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3026                                 } else {
3027                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3028                                 }
3029                         }
3030
3031                         if (!empty($data['description']) && !empty($content)) {
3032                                 similar_text($data['description'], $content, $percent);
3033                         } else {
3034                                 $percent = 0;
3035                         }
3036
3037                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3038                                 $data['description'] = '';
3039                         }
3040
3041                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3042                                 $data['author_name'] = '';
3043                         }
3044
3045                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3046                                 $data['author_url'] = '';
3047                         }
3048                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3049                         $data = BBCode::getAttachmentData($match[1]);
3050                 }
3051                 DI::profiler()->stopRecording();
3052
3053                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3054                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3055                                 $parts = parse_url($data['url']);
3056                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3057                                         if (empty($data['provider_name'])) {
3058                                                 $data['provider_name'] = $parts['host'];
3059                                         }
3060                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3061                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3062
3063                                                 if (!empty($parts['port'])) {
3064                                                         $data['provider_url'] .= ':' . $parts['port'];
3065                                                 }
3066                                         }
3067                                 }
3068
3069                                 // @todo Use a template
3070                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3071                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3072                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3073                                         '$url'  => $data['url'],
3074                                         '$title' => $data['title'],
3075                                 ]);
3076                         } else {
3077                                 return $content;
3078                         }
3079
3080                         if ($shared) {
3081                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3082                         } else {
3083                                 return $content . $rendered;
3084                         }
3085                 }
3086                 return $content;
3087         }
3088
3089         /**
3090          * Add non visual attachments to the content
3091          *
3092          * @param array $attachments
3093          * @param array $item
3094          * @param string $content
3095          * @return string modified content
3096          */
3097         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3098         {
3099                 DI::profiler()->startRecording('rendering');
3100                 $trailing = '';
3101                 foreach ($attachments['additional'] as $attachment) {
3102                         if (strpos($item['body'], $attachment['url'])) {
3103                                 continue;
3104                         }
3105
3106                         $author = ['uid' => 0, 'id' => $item['author-id'],
3107                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3108                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3109
3110                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3111
3112                         if (!empty($attachment['size'])) {
3113                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3114                         }
3115
3116                         /// @todo Use a template
3117                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3118                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3119                 }
3120
3121                 if ($trailing != '') {
3122                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3123                 }
3124
3125                 DI::profiler()->stopRecording();
3126                 return $content;
3127         }
3128
3129         /**
3130          * get private link for item
3131          *
3132          * @param array $item
3133          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3134          * @throws \Exception
3135          */
3136         public static function getPlink($item)
3137         {
3138                 if (local_user()) {
3139                         $ret = [
3140                                 'href' => "display/" . $item['guid'],
3141                                 'orig' => "display/" . $item['guid'],
3142                                 'title' => DI::l10n()->t('View on separate page'),
3143                                 'orig_title' => DI::l10n()->t('View on separate page'),
3144                         ];
3145
3146                         if (!empty($item['plink'])) {
3147                                 $ret['href'] = DI::baseUrl()->remove($item['plink']);
3148                                 $ret['title'] = DI::l10n()->t('Link to source');
3149                         }
3150                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3151                         $ret = [
3152                                 'href' => $item['plink'],
3153                                 'orig' => $item['plink'],
3154                                 'title' => DI::l10n()->t('Link to source'),
3155                                 'orig_title' => DI::l10n()->t('Link to source'),
3156                         ];
3157                 } else {
3158                         $ret = [];
3159                 }
3160
3161                 return $ret;
3162         }
3163
3164         /**
3165          * Is the given item array a post that is sent as starting post to a forum?
3166          *
3167          * @param array $item
3168          * @param array $owner
3169          *
3170          * @return boolean "true" when it is a forum post
3171          */
3172         public static function isForumPost(array $item, array $owner = [])
3173         {
3174                 if (empty($owner)) {
3175                         $owner = User::getOwnerDataById($item['uid']);
3176                         if (empty($owner)) {
3177                                 return false;
3178                         }
3179                 }
3180
3181                 if (($item['author-id'] == $item['owner-id']) ||
3182                         ($owner['id'] == $item['contact-id']) ||
3183                         ($item['uri-id'] != $item['parent-uri-id']) ||
3184                         $item['origin']) {
3185                         return false;
3186                 }
3187
3188                 return Contact::isForum($item['contact-id']);
3189         }
3190
3191         /**
3192          * Search item id for given URI or plink
3193          *
3194          * @param string $uri
3195          * @param integer $uid
3196          *
3197          * @return integer item id
3198          */
3199         public static function searchByLink($uri, $uid = 0)
3200         {
3201                 $ssl_uri = str_replace('http://', 'https://', $uri);
3202                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3203
3204                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3205                 if (DBA::isResult($item)) {
3206                         return $item['id'];
3207                 }
3208
3209                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3210                 if (DBA::isResult($item)) {
3211                         return $item['id'];
3212                 }
3213
3214                 return 0;
3215         }
3216
3217         /**
3218          * Return the URI for a link to the post
3219          *
3220          * @param string $uri URI or link to post
3221          *
3222          * @return string URI
3223          */
3224         public static function getURIByLink(string $uri)
3225         {
3226                 $ssl_uri = str_replace('http://', 'https://', $uri);
3227                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3228
3229                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3230                 if (DBA::isResult($item)) {
3231                         return $item['uri'];
3232                 }
3233
3234                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3235                 if (DBA::isResult($item)) {
3236                         return $item['uri'];
3237                 }
3238
3239                 return '';
3240         }
3241
3242         /**
3243          * Fetches item for given URI or plink
3244          *
3245          * @param string $uri
3246          * @param integer $uid
3247          *
3248          * @return integer item id
3249          */
3250         public static function fetchByLink(string $uri, int $uid = 0)
3251         {
3252                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3253                 $item_id = self::searchByLink($uri, $uid);
3254                 if (!empty($item_id)) {
3255                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3256                         return $item_id;
3257                 }
3258
3259                 $hookData = [
3260                         'uri'     => $uri,
3261                         'uid'     => $uid,
3262                         'item_id' => null,
3263                 ];
3264
3265                 Hook::callAll('item_by_link', $hookData);
3266
3267                 if (isset($hookData['item_id'])) {
3268                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3269                 }
3270
3271                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3272                         $item_id = self::searchByLink($fetched_uri, $uid);
3273                 } else {
3274                         $item_id = Diaspora::fetchByURL($uri);
3275                 }
3276
3277                 if (!empty($item_id)) {
3278                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3279                         return $item_id;
3280                 }
3281
3282                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3283                 return 0;
3284         }
3285
3286         /**
3287          * Return share data from an item array (if the item is shared item)
3288          * We are providing the complete Item array, because at some time in the future
3289          * we hopefully will define these values not in the body anymore but in some item fields.
3290          * This function is meant to replace all similar functions in the system.
3291          *
3292          * @param array $item
3293          *
3294          * @return array with share information
3295          */
3296         public static function getShareArray($item)
3297         {
3298                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3299                         return [];
3300                 }
3301
3302                 $attribute_string = $matches[2];
3303                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3304                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3305                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3306                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3307                         }
3308                 }
3309                 return $attributes;
3310         }
3311
3312         /**
3313          * Fetch item information for shared items from the original items and adds it.
3314          *
3315          * @param array $item
3316          *
3317          * @return array item array with data from the original item
3318          */
3319         public static function addShareDataFromOriginal(array $item)
3320         {
3321                 $shared = self::getShareArray($item);
3322                 if (empty($shared)) {
3323                         return $item;
3324                 }
3325
3326                 // Real reshares always have got a GUID.
3327                 if (empty($shared['guid'])) {
3328                         return $item;
3329                 }
3330
3331                 $uid = $item['uid'] ?? 0;
3332
3333                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3334                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3335                 if (!DBA::isResult($shared_item)) {
3336                         if (empty($shared['link'])) {
3337                                 return $item;
3338                         }
3339
3340                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3341                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3342                         if (empty($id)) {
3343                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3344                                 return $item;
3345                         }
3346
3347                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3348                         if (!DBA::isResult($shared_item)) {
3349                                 return $item;
3350                         }
3351                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3352                 } else {
3353                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3354                 }
3355
3356                 if (!empty($shared_item['title'])) {
3357                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3358                         unset($shared_item['title']);
3359                 } else {
3360                         $body = $shared_item['body'];
3361                 }
3362
3363                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3364                 unset($shared_item['body']);
3365
3366                 return array_merge($item, $shared_item);
3367         }
3368
3369         /**
3370          * Check a prospective item array against user-level permissions
3371          *
3372          * @param array $item Expected keys: uri, gravity, and
3373          *                    author-link if is author-id is set,
3374          *                    owner-link if is owner-id is set,
3375          *                    causer-link if is causer-id is set.
3376          * @param int   $user_id Local user ID
3377          * @return bool
3378          * @throws \Exception
3379          */
3380         protected static function isAllowedByUser(array $item, int $user_id)
3381         {
3382                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3383                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3384                         return false;
3385                 }
3386
3387                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3388                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3389                         return false;
3390                 }
3391
3392                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3393                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3394                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3395                         return false;
3396                 }
3397
3398                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3399                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3400                         return false;
3401                 }
3402
3403                 return true;
3404         }
3405
3406         /**
3407          * Improve the data in shared posts
3408          *
3409          * @param array $item
3410          * @return string body
3411          */
3412         public static function improveSharedDataInBody(array $item)
3413         {
3414                 $shared = BBCode::fetchShareAttributes($item['body']);
3415                 if (empty($shared['link'])) {
3416                         return $item['body'];
3417                 }
3418
3419                 $id = self::fetchByLink($shared['link']);
3420                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3421                 if (!$id) {
3422                         return $item['body'];
3423                 }
3424
3425                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3426                 if (!DBA::isResult($shared_item)) {
3427                         return $item['body'];
3428                 }
3429
3430                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3431
3432                 if (!empty($shared_item['title'])) {
3433                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3434                 }
3435
3436                 $shared_content .= $shared_item['body'];
3437
3438                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3439                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3440                 return $item['body'];
3441         }
3442 }