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', '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', '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', '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']       = $toplevel_parent['deleted'];
 884
 885                         // Reshares have to keep their permissions to allow forums to work
 886                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 887                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 888                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 889                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 890                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 891                         }
 892
 893                         $parent_origin         = $toplevel_parent['origin'];
 894
 895                         // Don't federate received participation messages
 896                         if ($item['verb'] != Activity::FOLLOW) {
 897                                 $item['wall'] = $toplevel_parent['wall'];
 898                         } else {
 899                                 $item['wall'] = false;
 900                                 // Participations are technical messages, so they are set to "seen" automatically
 901                                 $item['unseen'] = false;
 902                         }
 903
 904                         /*
 905                          * If the parent is private, force privacy for the entire conversation
 906                          * This differs from the above settings as it subtly allows comments from
 907                          * email correspondents to be private even if the overall thread is not.
 908                          */
 909                         if ($toplevel_parent['private']) {
 910                                 $item['private'] = $toplevel_parent['private'];
 911                         }
 912
 913                         // If its a post that originated here then tag the thread as "mention"
 914                         if ($item['origin'] && $item['uid']) {
 915                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 916                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 917                         }
 918
 919                         // Update the contact relations
 920                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 921                 } else {
 922                         $parent_id = 0;
 923                         $parent_origin = $item['origin'];
 924                 }
 925
 926                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 927                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 928
 929                 // Is this item available in the global items (with uid=0)?
 930                 if ($item["uid"] == 0) {
 931                         $item["global"] = true;
 932
 933                         // Set the global flag on all items if this was a global item entry
 934                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 935                 } else {
 936                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 937                 }
 938
 939                 // ACL settings
 940                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 941                         $item["private"] = self::PRIVATE;
 942                 }
 943
 944                 if ($notify && $post_local) {
 945                         $item['edit'] = false;
 946                         $item['parent'] = $parent_id;
 947
 948                         // Trigger automatic reactions for addons
 949                         if (!isset($item['api_source'])) {
 950                                 $item['api_source'] = true;
 951                         }
 952
 953                         // We have to tell the hooks who we are - this really should be improved
 954                         if (!local_user()) {
 955                                 $_SESSION['authenticated'] = true;
 956                                 $_SESSION['uid'] = $uid;
 957                                 $dummy_session = true;
 958                         } else {
 959                                 $dummy_session = false;
 960                         }
 961
 962                         Hook::callAll('post_local', $item);
 963
 964                         if ($dummy_session) {
 965                                 unset($_SESSION['authenticated']);
 966                                 unset($_SESSION['uid']);
 967                         }
 968                 } elseif (!$notify) {
 969                         Hook::callAll('post_remote', $item);
 970                 }
 971
 972                 if (!empty($item['cancel'])) {
 973                         Logger::notice('post cancelled by addon.');
 974                         return 0;
 975                 }
 976
 977                 if (empty($item['vid']) && !empty($item['verb'])) {
 978                         $item['vid'] = Verb::getID($item['verb']);
 979                 }
 980
 981                 // Creates or assigns the permission set
 982                 $item['psid'] = DI::permissionSet()->selectOrCreate(
 983                         DI::permissionSetFactory()->createFromString(
 984                                 $item['uid'],
 985                                 $item['allow_cid'],
 986                                 $item['allow_gid'],
 987                                 $item['deny_cid'],
 988                                 $item['deny_gid']
 989                 ))->id;
 990
 991                 if (!empty($item['extid'])) {
 992                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
 993                 }
 994
 995                 if ($item['verb'] == Activity::ANNOUNCE) {
 996                         self::setOwnerforResharedItem($item);
 997                 }
 998
 999                 if (isset($item['attachments'])) {
1000                         foreach ($item['attachments'] as $attachment) {
1001                                 $attachment['uri-id'] = $item['uri-id'];
1002                                 Post\Media::insert($attachment);
1003                         }
1004                         unset($item['attachments']);
1005                 }
1006
1007                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1008
1009                 // Remove all media attachments from the body and store them in the post-media table
1010                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1011                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1012
1013                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1014                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1015                 }
1016
1017                 // Check for hashtags in the body and repair or add hashtag links
1018                 $item['body'] = self::setHashtags($item['body']);
1019
1020                 if (stristr($item['verb'], Activity::POKE)) {
1021                         $notify_type = Delivery::POKE;
1022                 } else {
1023                         $notify_type = Delivery::POST;
1024                 }
1025
1026                 // Filling item related side tables
1027                 if (!empty($item['attach'])) {
1028                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1029                 }
1030
1031                 if (empty($item['event-id'])) {
1032                         unset($item['event-id']);
1033
1034                         $ev = Event::fromBBCode($item['body']);
1035                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1036                                 Logger::info('Event found.');
1037                                 $ev['cid']       = $item['contact-id'];
1038                                 $ev['uid']       = $item['uid'];
1039                                 $ev['uri']       = $item['uri'];
1040                                 $ev['edited']    = $item['edited'];
1041                                 $ev['private']   = $item['private'];
1042                                 $ev['guid']      = $item['guid'];
1043                                 $ev['plink']     = $item['plink'];
1044                                 $ev['network']   = $item['network'];
1045                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1046                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1047                                 $ev['source']    = $item['source'] ?? '';
1048
1049                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1050                                 if (DBA::isResult($event)) {
1051                                         $ev['id'] = $event['id'];
1052                                 }
1053
1054                                 $event_id = Event::store($ev);
1055                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1056
1057                                 Logger::info('Event was stored', ['id' => $event_id]);
1058                         }
1059                 }
1060
1061                 if (empty($item['causer-id'])) {
1062                         unset($item['causer-id']);
1063                 }
1064
1065                 Post::insert($item['uri-id'], $item);
1066
1067                 if ($item['gravity'] == GRAVITY_PARENT) {
1068                         Post\Thread::insert($item['uri-id'], $item);
1069                 }
1070
1071                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1072                         Post\Content::insert($item['uri-id'], $item);
1073                 }
1074
1075                 // Create Diaspora signature
1076                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1077                         $signed = Diaspora::createCommentSignature($item);
1078                         if (!empty($signed)) {
1079                                 $item['diaspora_signed_text'] = json_encode($signed);
1080                         }
1081                 }
1082
1083                 if (!empty($item['diaspora_signed_text'])) {
1084                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1085                 }
1086
1087                 // Attached file links
1088                 if (!empty($item['file'])) {
1089                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1090                 }
1091
1092                 // Delivery relevant data
1093                 $delivery_data = Post\DeliveryData::extractFields($item);
1094
1095                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1096                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1097                 }
1098
1099                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1100                 if (!Tag::existsForPost($item['uri-id'])) {
1101                         Tag::storeFromBody($item['uri-id'], $item['body']);
1102                 }
1103
1104                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1105                 if (Post::exists($condition)) {
1106                         Logger::notice('Item is already inserted - aborting', $condition);
1107                         return 0;
1108                 }
1109
1110                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1111                 if (!$post_user_id) {
1112                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1113                         return 0;
1114                 }
1115
1116                 if ($item['gravity'] == GRAVITY_PARENT) {
1117                         $item['post-user-id'] = $post_user_id;
1118                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1119                 }
1120
1121                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1122
1123                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1124                 if (!DBA::isResult($posted_item)) {
1125                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1126                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1127                         self::spool($orig_item);
1128                         return 0;
1129                 }
1130
1131                 // update the commented timestamp on the parent
1132                 if (DI::config()->get('system', 'like_no_comment')) {
1133                         // Update when it is a comment
1134                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1135                 } else {
1136                         // Update when it isn't a follow or tag verb
1137                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1138                 }
1139
1140                 if ($update_commented) {
1141                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1142                 } else {
1143                         $fields = ['changed' => DateTimeFormat::utcNow()];
1144                 }
1145
1146                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1147
1148                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1149                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1150                         // Get the user information for the logging
1151                         $user = User::getById($uid);
1152
1153                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1154                         return 0;
1155                 }
1156
1157                 if ($notify) {
1158                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1159                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1160                         }
1161                         Hook::callAll('post_local_end', $posted_item);
1162                 } else {
1163                         Hook::callAll('post_remote_end', $posted_item);
1164                 }
1165
1166                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1167                         self::addShadow($post_user_id);
1168                 } else {
1169                         self::addShadowPost($post_user_id);
1170                 }
1171
1172                 self::updateContact($posted_item);
1173
1174                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1175
1176                 // Distribute items to users who subscribed to their tags
1177                 self::distributeByTags($posted_item);
1178
1179                 // Automatically reshare the item if the "remote_self" option is selected
1180                 self::autoReshare($posted_item);
1181
1182                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1183
1184                 if ($transmit) {
1185                         // Don't relay participation messages
1186                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1187                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1188                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1189                                 $transmit = false;
1190                         }
1191                 }
1192
1193                 if ($transmit) {
1194                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1195                 }
1196
1197                 return $post_user_id;
1198         }
1199
1200         /**
1201          * Change the owner of a parent item if it had been shared by a forum
1202          *
1203          * (public) forum posts in the new format consist of the regular post by the author
1204          * followed by an announce message sent from the forum account.
1205          * Changing the owner helps in grouping forum posts.
1206          *
1207          * @param array $item
1208          * @return void
1209          */
1210         private static function setOwnerforResharedItem(array $item)
1211         {
1212                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1213                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1214                 if (!DBA::isResult($parent)) {
1215                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1216                         return;
1217                 }
1218
1219                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1220                 if (!DBA::isResult($author)) {
1221                         Logger::error('Author not found', ['id' => $item['author-id']]);
1222                         return;
1223                 }
1224
1225                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1226                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1227                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1228                         return;
1229                 }
1230
1231                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1232                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1233                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1234                                 return;
1235                         }
1236
1237                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1238                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1239                                 return;
1240                         }
1241                 }
1242
1243                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1244                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1245         }
1246
1247         /**
1248          * Distribute the given item to users who subscribed to their tags
1249          *
1250          * @param array $item     Processed item
1251          */
1252         private static function distributeByTags(array $item)
1253         {
1254                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1255                         return;
1256                 }
1257
1258                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1259                 foreach ($uids as $uid) {
1260                         if (Contact::isSharing($item['author-id'], $uid)) {
1261                                 $fields = [];
1262                         } else {
1263                                 $fields = ['post-reason' => self::PR_TAG];
1264                         }
1265
1266                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1267                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1268                 }
1269         }
1270
1271         /**
1272          * Distributes public items to the receivers
1273          *
1274          * @param integer $itemid      Item ID that should be added
1275          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1276          * @throws \Exception
1277          */
1278         public static function distribute($itemid, $signed_text = '')
1279         {
1280                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1281                 $parent = Post::selectFirst(['owner-id'], $condition);
1282                 if (!DBA::isResult($parent)) {
1283                         Logger::warning('Item not found', ['condition' => $condition]);
1284                         return;
1285                 }
1286
1287                 // Only distribute public items from native networks
1288                 $condition = ['id' => $itemid, 'uid' => 0,
1289                         'network' => array_merge(Protocol::FEDERATED ,['']),
1290                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1291                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1292                 if (!DBA::isResult($item)) {
1293                         Logger::warning('Item not found', ['condition' => $condition]);
1294                         return;
1295                 }
1296
1297                 $origin = $item['origin'];
1298
1299                 $users = [];
1300
1301                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1302                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1303                 if (!DBA::isResult($owner)) {
1304                         return;
1305                 }
1306
1307                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1308                 $contacts = DBA::select('contact', ['uid'], $condition);
1309                 while ($contact = DBA::fetch($contacts)) {
1310                         if ($contact['uid'] == 0) {
1311                                 continue;
1312                         }
1313
1314                         $users[$contact['uid']] = $contact['uid'];
1315                 }
1316                 DBA::close($contacts);
1317
1318                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1319                 $contacts = DBA::select('contact', ['uid'], $condition);
1320                 while ($contact = DBA::fetch($contacts)) {
1321                         if ($contact['uid'] == 0) {
1322                                 continue;
1323                         }
1324
1325                         $users[$contact['uid']] = $contact['uid'];
1326                 }
1327                 DBA::close($contacts);
1328
1329                 if (!empty($owner['alias'])) {
1330                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1331                         $contacts = DBA::select('contact', ['uid'], $condition);
1332                         while ($contact = DBA::fetch($contacts)) {
1333                                 if ($contact['uid'] == 0) {
1334                                         continue;
1335                                 }
1336
1337                                 $users[$contact['uid']] = $contact['uid'];
1338                         }
1339                         DBA::close($contacts);
1340                 }
1341
1342                 $origin_uid = 0;
1343
1344                 if ($item['uri-id'] != $item['parent-uri-id']) {
1345                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1346                         while ($parent = Post::fetch($parents)) {
1347                                 $users[$parent['uid']] = $parent['uid'];
1348                                 if ($parent['origin'] && !$origin) {
1349                                         $origin_uid = $parent['uid'];
1350                                 }
1351                         }
1352                         DBA::close($parents);
1353                 }
1354
1355                 foreach ($users as $uid) {
1356                         if ($origin_uid == $uid) {
1357                                 $item['diaspora_signed_text'] = $signed_text;
1358                         }
1359                         self::storeForUser($item, $uid);
1360                 }
1361         }
1362
1363         /**
1364          * Store a public item defined by their URI-ID for the given users
1365          *
1366          * @param integer $uri_id     URI-ID of the given item
1367          * @param integer $uid        The user that will receive the item entry
1368          * @param array   $fields     Additional fields to be stored
1369          * @param integer $source_uid User id of the source post
1370          * @return integer stored item id
1371          */
1372         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1373         {
1374                 if ($uid == $source_uid) {
1375                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1376                         return 0;
1377                 }
1378
1379                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1380                 if (!DBA::isResult($item)) {
1381                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1382                         return 0;
1383                 }
1384
1385                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1386                         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']]);
1387                         return 0;
1388                 }
1389
1390                 $item['post-reason'] = self::PR_STORED;
1391
1392                 $item = array_merge($item, $fields);
1393
1394                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1395
1396                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1397                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') &&
1398                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1399                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1400                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1401                         return 0;
1402                 }
1403
1404                 if ((($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1405                         // Only do an auto complete with the source uid "0" to prevent privavy problems
1406                         $causer = $item['causer-id'] ?: $item['author-id'];
1407                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED]);
1408                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1409                 }
1410
1411                 $stored = self::storeForUser($item, $uid);
1412                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1413                 return $stored;
1414         }
1415
1416         /**
1417          * Store a public item array for the given users
1418          *
1419          * @param array   $item   The item entry that will be stored
1420          * @param integer $uid    The user that will receive the item entry
1421          * @return integer stored item id
1422          * @throws \Exception
1423          */
1424         private static function storeForUser(array $item, int $uid)
1425         {
1426                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1427                         if (!empty($item['event-id'])) {
1428                                 $post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1429                                 if (!empty($post['event-id'])) {
1430                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1431                                         if (!empty($event)) {
1432                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1433                                                 $ret = DBA::update('event', $event, ['id' => $post['event-id']]);
1434                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $post['event-id'], 'ret' => $ret]);
1435                                         }
1436                                 }
1437                         }
1438                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1439                         return 0;
1440                 }
1441
1442                 unset($item['id']);
1443                 unset($item['mention']);
1444                 unset($item['starred']);
1445                 unset($item['unseen']);
1446                 unset($item['psid']);
1447                 unset($item['pinned']);
1448                 unset($item['ignored']);
1449                 unset($item['pubmail']);
1450
1451                 unset($item['event-id']);
1452                 unset($item['hidden']);
1453                 unset($item['notification-type']);
1454
1455                 $item['uid'] = $uid;
1456                 $item['origin'] = 0;
1457                 $item['wall'] = 0;
1458
1459                 if ($item['gravity'] == GRAVITY_PARENT) {
1460                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1461                 } else {
1462                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1463                 }
1464
1465                 if (!empty($contact['id'])) {
1466                         $item['contact-id'] = $contact['id'];
1467                 } else {
1468                         // Shouldn't happen at all
1469                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1470                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1471                         if (!DBA::isResult($self)) {
1472                                 // Shouldn't happen even less
1473                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1474                                 return 0;
1475                         }
1476                         $item['contact-id'] = $self['id'];
1477                 }
1478
1479                 $notify = false;
1480                 if ($item['gravity'] == GRAVITY_PARENT) {
1481                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1482                         if (DBA::isResult($contact)) {
1483                                 $notify = self::isRemoteSelf($contact, $item);
1484                         }
1485                 }
1486
1487                 $distributed = self::insert($item, $notify);
1488
1489                 if (!$distributed) {
1490                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1491                 } else {
1492                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1493                 }
1494                 return $distributed;
1495         }
1496
1497         /**
1498          * Add a shadow entry for a given item id that is a thread starter
1499          *
1500          * We store every public item entry additionally with the user id "0".
1501          * This is used for the community page and for the search.
1502          * It is planned that in the future we will store public item entries only once.
1503          *
1504          * @param integer $itemid Item ID that should be added
1505          * @throws \Exception
1506          */
1507         private static function addShadow($itemid)
1508         {
1509                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1510                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1511                 $item = Post::selectFirst($fields, $condition);
1512
1513                 if (!DBA::isResult($item)) {
1514                         return;
1515                 }
1516
1517                 // is it already a copy?
1518                 if (($itemid == 0) || ($item['uid'] == 0)) {
1519                         return;
1520                 }
1521
1522                 // Is it a visible public post?
1523                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1524                         return;
1525                 }
1526
1527                 // is it an entry from a connector? Only add an entry for natively connected networks
1528                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1529                         return;
1530                 }
1531
1532                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1533                         return;
1534                 }
1535
1536                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1537
1538                 if (DBA::isResult($item)) {
1539                         // Preparing public shadow (removing user specific data)
1540                         $item['uid'] = 0;
1541                         unset($item['id']);
1542                         unset($item['parent']);
1543                         unset($item['wall']);
1544                         unset($item['mention']);
1545                         unset($item['origin']);
1546                         unset($item['starred']);
1547                         unset($item['postopts']);
1548                         unset($item['inform']);
1549                         unset($item['post-reason']);
1550                         if ($item['uri-id'] == $item['parent-uri-id']) {
1551                                 $item['contact-id'] = $item['owner-id'];
1552                         } else {
1553                                 $item['contact-id'] = $item['author-id'];
1554                         }
1555
1556                         $public_shadow = self::insert($item);
1557
1558                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1559                 }
1560         }
1561
1562         /**
1563          * Add a shadow entry for a given item id that is a comment
1564          *
1565          * This function does the same like the function above - but for comments
1566          *
1567          * @param integer $itemid Item ID that should be added
1568          * @throws \Exception
1569          */
1570         private static function addShadowPost($itemid)
1571         {
1572                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1573                 if (!DBA::isResult($item)) {
1574                         return;
1575                 }
1576
1577                 // Is it a toplevel post?
1578                 if ($item['gravity'] == GRAVITY_PARENT) {
1579                         self::addShadow($itemid);
1580                         return;
1581                 }
1582
1583                 // Is this a shadow entry?
1584                 if ($item['uid'] == 0) {
1585                         return;
1586                 }
1587
1588                 // Is there a shadow parent?
1589                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1590                         return;
1591                 }
1592
1593                 // Is there already a shadow entry?
1594                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1595                         return;
1596                 }
1597
1598                 // Save "origin" and "parent" state
1599                 $origin = $item['origin'];
1600                 $parent = $item['parent'];
1601
1602                 // Preparing public shadow (removing user specific data)
1603                 $item['uid'] = 0;
1604                 unset($item['id']);
1605                 unset($item['parent']);
1606                 unset($item['wall']);
1607                 unset($item['mention']);
1608                 unset($item['origin']);
1609                 unset($item['starred']);
1610                 unset($item['postopts']);
1611                 unset($item['inform']);
1612                 unset($item['post-reason']);
1613                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1614
1615                 $public_shadow = self::insert($item);
1616
1617                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1618
1619                 // If this was a comment to a Diaspora post we don't get our comment back.
1620                 // This means that we have to distribute the comment by ourselves.
1621                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1622                         self::distribute($public_shadow);
1623                 }
1624         }
1625
1626         /**
1627          * Adds a language specification in a "language" element of given $arr.
1628          * Expects "body" element to exist in $arr.
1629          *
1630          * @param array $item
1631          * @return string detected language
1632          * @throws \Text_LanguageDetect_Exception
1633          */
1634         private static function getLanguage(array $item)
1635         {
1636                 if (!empty($item['language'])) {
1637                         return $item['language'];
1638                 }
1639
1640                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1641                         return '';
1642                 }
1643
1644                 // Convert attachments to links
1645                 $naked_body = BBCode::removeAttachment($item['body']);
1646                 if (empty($naked_body)) {
1647                         return '';
1648                 }
1649
1650                 // Remove links and pictures
1651                 $naked_body = BBCode::removeLinks($naked_body);
1652
1653                 // Convert the title and the body to plain text
1654                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1655
1656                 // Remove possibly remaining links
1657                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1658
1659                 if (empty($naked_body)) {
1660                         return '';
1661                 }
1662
1663                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1664                 // See https://github.com/friendica/friendica/issues/10511
1665                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1666                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1667                 $availableLanguages['fa'] = 'fa';
1668
1669                 $ld = new Language($availableLanguages);
1670                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1671                 if (is_array($languages)) {
1672                         return json_encode($languages);
1673                 }
1674
1675                 return '';
1676         }
1677
1678         public static function getLanguageMessage(array $item)
1679         {
1680                 $iso639 = new \Matriphe\ISO639\ISO639;
1681
1682                 $used_languages = '';
1683                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1684                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1685                 }
1686                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1687                 return $used_languages;
1688         }
1689
1690         /**
1691          * Creates an unique guid out of a given uri
1692          *
1693          * @param string $uri uri of an item entry
1694          * @param string $host hostname for the GUID prefix
1695          * @return string unique guid
1696          */
1697         public static function guidFromUri($uri, $host)
1698         {
1699                 // Our regular guid routine is using this kind of prefix as well
1700                 // We have to avoid that different routines could accidentally create the same value
1701                 $parsed = parse_url($uri);
1702
1703                 // We use a hash of the hostname as prefix for the guid
1704                 $guid_prefix = hash("crc32", $host);
1705
1706                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1707                 unset($parsed["scheme"]);
1708
1709                 // Glue it together to be able to make a hash from it
1710                 $host_id = implode("/", $parsed);
1711
1712                 // We could use any hash algorithm since it isn't a security issue
1713                 $host_hash = hash("ripemd128", $host_id);
1714
1715                 return $guid_prefix.$host_hash;
1716         }
1717
1718         /**
1719          * generate an unique URI
1720          *
1721          * @param integer $uid  User id
1722          * @param string  $guid An existing GUID (Otherwise it will be generated)
1723          *
1724          * @return string
1725          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1726          */
1727         public static function newURI($uid, $guid = "")
1728         {
1729                 if ($guid == "") {
1730                         $guid = System::createUUID();
1731                 }
1732
1733                 return DI::baseUrl()->get() . '/objects/' . $guid;
1734         }
1735
1736         /**
1737          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1738          *
1739          * This can be used to filter for inactive contacts.
1740          * Only do this for public postings to avoid privacy problems, since poco data is public.
1741          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1742          *
1743          * @param array $arr Contains the just posted item record
1744          * @throws \Exception
1745          */
1746         private static function updateContact($arr)
1747         {
1748                 // Unarchive the author
1749                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1750                 if (DBA::isResult($contact)) {
1751                         Contact::unmarkForArchival($contact);
1752                 }
1753
1754                 // Unarchive the contact if it's not our own contact
1755                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1756                 if (DBA::isResult($contact)) {
1757                         Contact::unmarkForArchival($contact);
1758                 }
1759
1760                 /// @todo On private posts we could obfuscate the date
1761                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1762
1763                 // Is it a forum? Then we don't care about the rules from above
1764                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1765                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1766                                 $update = true;
1767                         }
1768                 }
1769
1770                 if ($update) {
1771                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1772                         // So we have to ensure to only update the last item when it had been our own post,
1773                         // or it had been done by a "regular" contact.
1774                         if (!empty($arr['wall'])) {
1775                                 $condition = ['id' => $arr['contact-id']];
1776                         } else {
1777                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1778                         }
1779                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1780                 }
1781                 // Now do the same for the system wide contacts with uid=0
1782                 if ($arr['private'] != self::PRIVATE) {
1783                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1784                                 ['id' => $arr['owner-id']]);
1785
1786                         if ($arr['owner-id'] != $arr['author-id']) {
1787                                 Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1788                                         ['id' => $arr['author-id']]);
1789                         }
1790                 }
1791         }
1792
1793         public static function setHashtags($body)
1794         {
1795                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1796                         $tags = BBCode::getTags($body);
1797
1798                         // No hashtags?
1799                         if (!count($tags)) {
1800                                 return $body;
1801                         }
1802
1803                         // This sorting is important when there are hashtags that are part of other hashtags
1804                         // Otherwise there could be problems with hashtags like #test and #test2
1805                         // Because of this we are sorting from the longest to the shortest tag.
1806                         usort($tags, function ($a, $b) {
1807                                 return strlen($b) <=> strlen($a);
1808                         });
1809
1810                         $URLSearchString = "^\[\]";
1811
1812                         // All hashtags should point to the home server if "local_tags" is activated
1813                         if (DI::config()->get('system', 'local_tags')) {
1814                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1815                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1816                         }
1817
1818                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1819                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1820                                 function ($match) {
1821                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1822                                 }, $body);
1823
1824                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1825                                 function ($match) {
1826                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1827                                 }, $body);
1828
1829                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1830                                 function ($match) {
1831                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1832                                 }, $body);
1833
1834                         // Repair recursive urls
1835                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1836                                 "&num;$2", $body);
1837
1838                         foreach ($tags as $tag) {
1839                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1840                                         continue;
1841                                 }
1842
1843                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1844                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1845
1846                                 $body = str_replace($tag, $newtag, $body);
1847                         }
1848
1849                         // Convert back the masked hashtags
1850                         $body = str_replace("&num;", "#", $body);
1851
1852                         return $body;
1853                 });
1854
1855                 return $body;
1856         }
1857
1858         /**
1859          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1860          *
1861          * @param int $uid
1862          * @param int $item_id
1863          * @return boolean true if item was deleted, else false
1864          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1865          * @throws \ImagickException
1866          */
1867         private static function tagDeliver($uid, $item_id)
1868         {
1869                 $mention = false;
1870
1871                 $owner = User::getOwnerDataById($uid);
1872                 if (!DBA::isResult($owner)) {
1873                         Logger::warning('User not found, quitting.', ['uid' => $uid]);
1874                         return false;
1875                 }
1876
1877                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
1878                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
1879                         return false;
1880                 }
1881
1882                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
1883                 if (!DBA::isResult($item)) {
1884                         Logger::warning('Post not found, quitting.', ['id' => $item_id]);
1885                         return false;
1886                 }
1887
1888                 if ($item['wall'] || $item['origin'] || ($item['gravity'] != GRAVITY_PARENT)) {
1889                         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']]);
1890                         return false;
1891                 }
1892
1893                 $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1894                 foreach ($tags as $tag) {
1895                         if (Strings::compareLink($owner['url'], $tag['url'])) {
1896                                 $mention = true;
1897                                 Logger::info('Mention found in tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1898                         }
1899                 }
1900
1901                 // This check can most likely be removed since we always are having the tags
1902                 if (!$mention) {
1903                         $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1904                         if ($cnt) {
1905                                 foreach ($matches as $mtch) {
1906                                         if (Strings::compareLink($owner['url'], $mtch[1])) {
1907                                                 $mention = true;
1908                                                 Logger::notice('Mention found in body.', ['mention' => $mtch[2], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1909                                         }
1910                                 }
1911                         }
1912                 }
1913
1914                 if (!$mention) {
1915                         Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1916                         Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1917                         return true;
1918                 }
1919
1920                 $arr = ['item' => $item, 'user' => $owner];
1921
1922                 Hook::callAll('tagged', $arr);
1923
1924                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1925
1926                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
1927                         Group::getMembersForForum($owner['id']);
1928
1929                         $allow_cid = '<' . $owner['id'] . '>';
1930                         $allow_gid = '<' . Group::getIdForForum($owner['id']) . '>';
1931                         $deny_cid  = '';
1932                         $deny_gid  = '';
1933                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
1934                 } else {
1935                         self::performActivity($item['id'], 'announce', $uid);
1936                 }
1937
1938                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1939                 return false;
1940         }
1941
1942         /**
1943          * Automatically reshare the item if the "remote_self" option is selected
1944          *
1945          * @param array $item
1946          * @return void
1947          */
1948         private static function autoReshare(array $item)
1949         {
1950                 if ($item['gravity'] != GRAVITY_PARENT) {
1951                         return;
1952                 }
1953
1954                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
1955                         return;
1956                 }
1957
1958                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1959                         return;
1960                 }
1961
1962                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1963
1964                 self::performActivity($item['id'], 'announce', $item['uid']);
1965         }
1966
1967         public static function isRemoteSelf($contact, &$datarray)
1968         {
1969                 if (!$contact['remote_self']) {
1970                         return false;
1971                 }
1972
1973                 // Prevent the forwarding of posts that are forwarded
1974                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
1975                         Logger::info('Already forwarded');
1976                         return false;
1977                 }
1978
1979                 // Prevent to forward already forwarded posts
1980                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
1981                         Logger::info('Already forwarded (second test)');
1982                         return false;
1983                 }
1984
1985                 // Only forward posts
1986                 if ($datarray["verb"] != Activity::POST) {
1987                         Logger::info('No post');
1988                         return false;
1989                 }
1990
1991                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
1992                         Logger::info('Not public');
1993                         return false;
1994                 }
1995
1996                 $datarray2 = $datarray;
1997                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
1998                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
1999                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2000                                         ['uid' => $contact['uid'], 'self' => true]);
2001                         if (DBA::isResult($self)) {
2002                                 $datarray['contact-id'] = $self["id"];
2003
2004                                 $datarray['owner-name'] = $self["name"];
2005                                 $datarray['owner-link'] = $self["url"];
2006                                 $datarray['owner-avatar'] = $self["thumb"];
2007
2008                                 $datarray['author-name']   = $datarray['owner-name'];
2009                                 $datarray['author-link']   = $datarray['owner-link'];
2010                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2011
2012                                 unset($datarray['edited']);
2013
2014                                 unset($datarray['network']);
2015                                 unset($datarray['owner-id']);
2016                                 unset($datarray['author-id']);
2017                         }
2018
2019                         if ($contact['network'] != Protocol::FEED) {
2020                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2021                                 $datarray["guid"] = System::createUUID();
2022                                 unset($datarray["plink"]);
2023                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2024                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2025                                 $datarray["extid"] = Protocol::DFRN;
2026                                 $urlpart = parse_url($datarray2['author-link']);
2027                                 $datarray["app"] = $urlpart["host"];
2028                                 if (!empty($old_uri_id)) {
2029                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2030                                 }
2031
2032                                 unset($datarray["parent-uri"]);
2033                                 unset($datarray["thr-parent"]);
2034                         } else {
2035                                 $datarray['private'] = self::PUBLIC;
2036                         }
2037                 }
2038
2039                 if ($contact['network'] != Protocol::FEED) {
2040                         // Store the original post
2041                         $result = self::insert($datarray2);
2042                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2043                 } else {
2044                         $datarray["app"] = "Feed";
2045                         $result = true;
2046                 }
2047
2048                 return (bool)$result;
2049         }
2050
2051         /**
2052          *
2053          * @param string $s
2054          * @param int    $uid
2055          * @param array  $item
2056          * @param int    $cid
2057          * @return string
2058          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2059          * @throws \ImagickException
2060          */
2061         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2062         {
2063                 if (DI::config()->get('system', 'disable_embedded')) {
2064                         return $s;
2065                 }
2066
2067                 Logger::info('check for photos');
2068                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2069
2070                 $orig_body = $s;
2071                 $new_body = '';
2072
2073                 $img_start = strpos($orig_body, '[img');
2074                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2075                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2076
2077                 while (($img_st_close !== false) && ($img_len !== false)) {
2078                         $img_st_close++; // make it point to AFTER the closing bracket
2079                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2080
2081                         Logger::info('found photo', ['image' => $image]);
2082
2083                         if (stristr($image, $site . '/photo/')) {
2084                                 // Only embed locally hosted photos
2085                                 $replace = false;
2086                                 $i = basename($image);
2087                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2088                                 $x = strpos($i, '-');
2089
2090                                 if ($x) {
2091                                         $res = substr($i, $x + 1);
2092                                         $i = substr($i, 0, $x);
2093                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2094                                         if (DBA::isResult($photo)) {
2095                                                 /*
2096                                                  * Check to see if we should replace this photo link with an embedded image
2097                                                  * 1. No need to do so if the photo is public
2098                                                  * 2. If there's a contact-id provided, see if they're in the access list
2099                                                  *    for the photo. If so, embed it.
2100                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2101                                                  *    permissions, regardless of order but first check to see if they're an exact
2102                                                  *    match to save some processing overhead.
2103                                                  */
2104                                                 if (self::hasPermissions($photo)) {
2105                                                         if ($cid) {
2106                                                                 $recips = self::enumeratePermissions($photo);
2107                                                                 if (in_array($cid, $recips)) {
2108                                                                         $replace = true;
2109                                                                 }
2110                                                         } elseif ($item) {
2111                                                                 if (self::samePermissions($uid, $item, $photo)) {
2112                                                                         $replace = true;
2113                                                                 }
2114                                                         }
2115                                                 }
2116                                                 if ($replace) {
2117                                                         $photo_img = Photo::getImageForPhoto($photo);
2118                                                         // If a custom width and height were specified, apply before embedding
2119                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2120                                                                 Logger::info('scaling photo');
2121
2122                                                                 $width = intval($match[1]);
2123                                                                 $height = intval($match[2]);
2124
2125                                                                 $photo_img->scaleDown(max($width, $height));
2126                                                         }
2127
2128                                                         $data = $photo_img->asString();
2129                                                         $type = $photo_img->getType();
2130
2131                                                         Logger::info('replacing photo');
2132                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2133                                                         Logger::debug('replaced', ['image' => $image]);
2134                                                 }
2135                                         }
2136                                 }
2137                         }
2138
2139                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2140                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2141                         if ($orig_body === false) {
2142                                 $orig_body = '';
2143                         }
2144
2145                         $img_start = strpos($orig_body, '[img');
2146                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2147                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2148                 }
2149
2150                 $new_body = $new_body . $orig_body;
2151
2152                 return $new_body;
2153         }
2154
2155         private static function hasPermissions($obj)
2156         {
2157                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2158                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2159         }
2160
2161         private static function samePermissions($uid, $obj1, $obj2)
2162         {
2163                 // first part is easy. Check that these are exactly the same.
2164                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2165                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2166                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2167                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2168                         return true;
2169                 }
2170
2171                 // This is harder. Parse all the permissions and compare the resulting set.
2172                 $recipients1 = self::enumeratePermissions($obj1);
2173                 $recipients2 = self::enumeratePermissions($obj2);
2174                 sort($recipients1);
2175                 sort($recipients2);
2176
2177                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2178                 return ($recipients1 == $recipients2);
2179         }
2180
2181         /**
2182          * Returns an array of contact-ids that are allowed to see this object
2183          *
2184          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2185          * @param bool  $check_dead Prunes unavailable contacts from the result
2186          * @return array
2187          * @throws \Exception
2188          */
2189         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2190         {
2191                 $aclFormater = DI::aclFormatter();
2192
2193                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2194                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2195                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2196                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2197                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2198                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2199                 $recipients   = array_diff($recipients, $deny);
2200                 return $recipients;
2201         }
2202
2203         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2204         {
2205                 if (!$uid || ($days < 1)) {
2206                         return;
2207                 }
2208
2209                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2210                         $uid, GRAVITY_PARENT];
2211
2212                 /*
2213                  * $expire_network_only = save your own wall posts
2214                  * and just expire conversations started by others
2215                  */
2216                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2217
2218                 if ($expire_network_only) {
2219                         $condition[0] .= " AND NOT `wall`";
2220                 }
2221
2222                 if ($network != "") {
2223                         $condition[0] .= " AND `network` = ?";
2224                         $condition[] = $network;
2225                 }
2226
2227                 $condition[0] .= " AND `received` < ?";
2228                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2229
2230                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2231
2232                 if (!DBA::isResult($items)) {
2233                         return;
2234                 }
2235
2236                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2237
2238                 // Forcing expiring of items - but not notes and marked items
2239                 if ($force) {
2240                         $expire_items = true;
2241                 }
2242
2243                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2244                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2245                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2246
2247                 $expired = 0;
2248
2249                 $priority = DI::config()->get('system', 'expire-notify-priority');
2250
2251                 while ($item = Post::fetch($items)) {
2252                         // don't expire filed items
2253                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2254                                 continue;
2255                         }
2256
2257                         // Only expire posts, not photos and photo comments
2258
2259                         if (!$expire_photos && !empty($item['resource-id'])) {
2260                                 continue;
2261                         } elseif (!$expire_starred && intval($item['starred'])) {
2262                                 continue;
2263                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2264                                 continue;
2265                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2266                                 continue;
2267                         }
2268
2269                         self::markForDeletionById($item['id'], $priority);
2270
2271                         ++$expired;
2272                 }
2273                 DBA::close($items);
2274                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2275         }
2276
2277         public static function firstPostDate($uid, $wall = false)
2278         {
2279                 $user = User::getById($uid, ['register_date']);
2280                 if (empty($user)) {
2281                         return false;
2282                 }
2283
2284                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2285                         $uid, $wall, $user['register_date']];
2286                 $params = ['order' => ['received' => false]];
2287                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2288                 if (DBA::isResult($thread)) {
2289                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2290                         return $postdate;
2291                 }
2292                 return false;
2293         }
2294
2295         /**
2296          * add/remove activity to an item
2297          *
2298          * Toggle activities as like,dislike,attend of an item
2299          *
2300          * @param int    $item_id
2301          * @param string $verb
2302          *            Activity verb. One of
2303          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2304          *            attendno, unattendno, attendmaybe, unattendmaybe,
2305          *            announce, unannouce
2306          * @param int    $uid
2307          * @param string $allow_cid
2308          * @param string $allow_gid
2309          * @param string $deny_cid
2310          * @param string $deny_gid
2311          * @return bool
2312          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2313          * @throws \ImagickException
2314          * @hook  'post_local_end'
2315          *            array $arr
2316          *            'post_id' => ID of posted item
2317          */
2318         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null)
2319         {
2320                 if (empty($uid)) {
2321                         return false;
2322                 }
2323
2324                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2325
2326                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2327                 if (!DBA::isResult($item)) {
2328                         Logger::notice('like: unknown item', ['id' => $item_id]);
2329                         return false;
2330                 }
2331
2332                 $uri_id = $item['uri-id'];
2333
2334                 if (!in_array($item['uid'], [0, $uid])) {
2335                         return false;
2336                 }
2337
2338                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2339                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2340                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2341                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2342                                 if (!DBA::isResult($item)) {
2343                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2344                                         return false;
2345                                 }
2346                         }
2347                 }
2348
2349                 // Retrieves the local post owner
2350                 $owner = User::getOwnerDataById($uid);
2351                 if (empty($owner)) {
2352                         Logger::info('Empty owner for user', ['uid' => $uid]);
2353                         return false;
2354                 }
2355
2356                 // Retrieve the current logged in user's public contact
2357                 $author_id = Contact::getIdForURL($owner['url']);
2358                 if (empty($author_id)) {
2359                         Logger::info('Empty public contact');
2360                         return false;
2361                 }
2362
2363                 $activity = null;
2364                 switch ($verb) {
2365                         case 'like':
2366                         case 'unlike':
2367                                 $activity = Activity::LIKE;
2368                                 break;
2369                         case 'dislike':
2370                         case 'undislike':
2371                                 $activity = Activity::DISLIKE;
2372                                 break;
2373                         case 'attendyes':
2374                         case 'unattendyes':
2375                                 $activity = Activity::ATTEND;
2376                                 break;
2377                         case 'attendno':
2378                         case 'unattendno':
2379                                 $activity = Activity::ATTENDNO;
2380                                 break;
2381                         case 'attendmaybe':
2382                         case 'unattendmaybe':
2383                                 $activity = Activity::ATTENDMAYBE;
2384                                 break;
2385                         case 'follow':
2386                         case 'unfollow':
2387                                 $activity = Activity::FOLLOW;
2388                                 break;
2389                         case 'announce':
2390                         case 'unannounce':
2391                                 $activity = Activity::ANNOUNCE;
2392                                 break;
2393                         default:
2394                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2395                                 return false;
2396                 }
2397
2398                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2399
2400                 // Enable activity toggling instead of on/off
2401                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2402
2403                 // Look for an existing verb row
2404                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2405                 if ($event_verb_flag) {
2406                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2407
2408                         // Translate to the index based activity index
2409                         $vids = [];
2410                         foreach ($verbs as $verb) {
2411                                 $vids[] = Verb::getID($verb);
2412                         }
2413                 } else {
2414                         $vids = Verb::getID($activity);
2415                 }
2416
2417                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2418                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2419                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2420
2421                 if (DBA::isResult($like_item)) {
2422                         /**
2423                          * Truth table for existing activities
2424                          *
2425                          * |          Inputs            ||      Outputs      |
2426                          * |----------------------------||-------------------|
2427                          * |  Mode  | Event | Same verb || Delete? | Return? |
2428                          * |--------|-------|-----------||---------|---------|
2429                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2430                          * | create |  Yes  |    No     ||   Yes   |   No    |
2431                          * | create |  No   |    Yes    ||   No    |   Yes   |
2432                          * | create |  No   |    No     ||        N/A†       |
2433                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2434                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2435                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2436                          * | delete |  No   |    No     ||        N/A†       |
2437                          * |--------|-------|-----------||---------|---------|
2438                          * |   A    |   B   |     C     || A xor C | !B or C |
2439                          *
2440                          * † Can't happen: It's impossible to find an existing non-event activity without
2441                          *                 the same verb because we are only looking for this single verb.
2442                          *
2443                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2444                          */
2445                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2446                                 self::markForDeletionById($like_item['id']);
2447                         }
2448
2449                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2450                                 return true;
2451                         }
2452                 }
2453
2454                 // No need to go further if we aren't creating anything
2455                 if ($mode == 'delete') {
2456                         return true;
2457                 }
2458
2459                 $allow_cid = $allow_cid ?? $item['allow_cid'];
2460                 $allow_gid = $allow_gid ?? $item['allow_gid'];
2461                 $deny_cid  = $deny_cid ?? $item['deny_cid'];
2462                 $deny_gid  = $deny_gid ?? $item['deny_gid'];
2463
2464                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2465
2466                 $new_item = [
2467                         'guid'          => System::createUUID(),
2468                         'uri'           => self::newURI($item['uid']),
2469                         'uid'           => $item['uid'],
2470                         'contact-id'    => $owner['id'],
2471                         'wall'          => $item['wall'],
2472                         'origin'        => 1,
2473                         'network'       => Protocol::DFRN,
2474                         'protocol'      => Conversation::PARCEL_DIRECT,
2475                         'direction'     => Conversation::PUSH,
2476                         'gravity'       => GRAVITY_ACTIVITY,
2477                         'parent'        => $item['id'],
2478                         'thr-parent'    => $item['uri'],
2479                         'owner-id'      => $author_id,
2480                         'author-id'     => $author_id,
2481                         'body'          => $activity,
2482                         'verb'          => $activity,
2483                         'object-type'   => $objtype,
2484                         'allow_cid'     => $allow_cid,
2485                         'allow_gid'     => $allow_gid,
2486                         'deny_cid'      => $deny_cid,
2487                         'deny_gid'      => $deny_gid,
2488                         'visible'       => 1,
2489                         'unseen'        => 1,
2490                 ];
2491
2492                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2493                 if (!empty($signed)) {
2494                         $new_item['diaspora_signed_text'] = json_encode($signed);
2495                 }
2496
2497                 $new_item_id = self::insert($new_item);
2498
2499                 // If the parent item isn't visible then set it to visible
2500                 if (!$item['visible']) {
2501                         self::update(['visible' => true], ['id' => $item['id']]);
2502                 }
2503
2504                 $new_item['id'] = $new_item_id;
2505
2506                 Hook::callAll('post_local_end', $new_item);
2507
2508                 return true;
2509         }
2510
2511         /**
2512          * Fetch the SQL condition for the given user id
2513          *
2514          * @param integer $owner_id User ID for which the permissions should be fetched
2515          * @return array condition
2516          */
2517         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2518         {
2519                 $local_user = local_user();
2520                 $remote_user = Session::getRemoteContactID($owner_id);
2521
2522                 // default permissions - anonymous user
2523                 $condition = ["`private` != ?", self::PRIVATE];
2524
2525                 if ($local_user && ($local_user == $owner_id)) {
2526                         // Profile owner - everything is visible
2527                         $condition = [];
2528                 } elseif ($remote_user) {
2529                          // Authenticated visitor - fetch the matching permissionsets
2530                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2531                         if (!empty($set)) {
2532                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2533                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2534                                         self::PRIVATE, self::PRIVATE];
2535                                 $condition = array_merge($condition, $permissionSets->column('id'));
2536                         }
2537                 }
2538
2539                 return $condition;
2540         }
2541
2542         /**
2543          * Get a permission SQL string for the given user
2544          *
2545          * @param int $owner_id
2546          * @param string $table
2547          * @return string
2548          */
2549         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2550         {
2551                 $local_user = local_user();
2552                 $remote_user = Session::getRemoteContactID($owner_id);
2553
2554                 if (!empty($table)) {
2555                         $table = DBA::quoteIdentifier($table) . '.';
2556                 }
2557
2558                 /*
2559                  * Construct permissions
2560                  *
2561                  * default permissions - anonymous user
2562                  */
2563                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2564
2565                 // Profile owner - everything is visible
2566                 if ($local_user && ($local_user == $owner_id)) {
2567                         $sql = '';
2568                 } elseif ($remote_user) {
2569                         /*
2570                          * Authenticated visitor. Unless pre-verified,
2571                          * check that the contact belongs to this $owner_id
2572                          * and load the groups the visitor belongs to.
2573                          * If pre-verified, the caller is expected to have already
2574                          * done this and passed the groups into this function.
2575                          */
2576                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2577
2578                         if (!empty($set)) {
2579                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2580                         } else {
2581                                 $sql_set = '';
2582                         }
2583
2584                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2585                 }
2586
2587                 return $sql;
2588         }
2589
2590         /**
2591          * get translated item type
2592          *
2593          * @param array                $item
2594          * @param \Friendica\Core\L10n $l10n
2595          * @return string
2596          */
2597         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2598         {
2599                 if (!empty($item['event-id'])) {
2600                         return $l10n->t('event');
2601                 } elseif (!empty($item['resource-id'])) {
2602                         return $l10n->t('photo');
2603                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2604                         return $l10n->t('activity');
2605                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2606                         return $l10n->t('comment');
2607                 }
2608
2609                 return $l10n->t('post');
2610         }
2611
2612         /**
2613          * Sets the "rendered-html" field of the provided item
2614          *
2615          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2616          *
2617          * @param array $item
2618          *
2619          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2620          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2621          */
2622         public static function putInCache(&$item)
2623         {
2624                 // Save original body to prevent addons to modify it
2625                 $body = $item['body'];
2626
2627                 $rendered_hash = $item['rendered-hash'] ?? '';
2628                 $rendered_html = $item['rendered-html'] ?? '';
2629
2630                 if ($rendered_hash == ''
2631                         || $rendered_html == ''
2632                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2633                         || DI::config()->get('system', 'ignore_cache')
2634                 ) {
2635                         self::addRedirToImageTags($item);
2636
2637                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2638                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2639
2640                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2641                         Hook::callAll('put_item_in_cache', $hook_data);
2642                         $item['rendered-html'] = $hook_data['rendered-html'];
2643                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2644                         unset($hook_data);
2645
2646                         // Update if the generated values differ from the existing ones
2647                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2648                                 self::update(
2649                                         [
2650                                                 'rendered-html' => $item['rendered-html'],
2651                                                 'rendered-hash' => $item['rendered-hash']
2652                                         ],
2653                                         ['id' => $item['id']]
2654                                 );
2655                         }
2656                 }
2657
2658                 $item['body'] = $body;
2659         }
2660
2661         /**
2662          * Find any non-embedded images in private items and add redir links to them
2663          *
2664          * @param array &$item The field array of an item row
2665          */
2666         private static function addRedirToImageTags(array &$item)
2667         {
2668                 $app = DI::app();
2669
2670                 $matches = [];
2671                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2672                 if ($cnt) {
2673                         foreach ($matches as $mtch) {
2674                                 if (strpos($mtch[1], '/redir') !== false) {
2675                                         continue;
2676                                 }
2677
2678                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->getContactId()) && ($item['network'] == Protocol::DFRN)) {
2679                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2680                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2681                                 }
2682                         }
2683                 }
2684         }
2685
2686         /**
2687          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2688          * If attach is true, also add icons for item attachments.
2689          *
2690          * @param array   $item
2691          * @param boolean $attach
2692          * @param boolean $is_preview
2693          * @return string item body html
2694          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2695          * @throws \ImagickException
2696          * @hook  prepare_body_init item array before any work
2697          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2698          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2699          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2700          */
2701         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2702         {
2703                 $a = DI::app();
2704                 Hook::callAll('prepare_body_init', $item);
2705
2706                 // In order to provide theme developers more possibilities, event items
2707                 // are treated differently.
2708                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2709                         $ev = Event::getItemHTML($item);
2710                         return $ev;
2711                 }
2712
2713                 $tags = Tag::populateFromItem($item);
2714
2715                 $item['tags'] = $tags['tags'];
2716                 $item['hashtags'] = $tags['hashtags'];
2717                 $item['mentions'] = $tags['mentions'];
2718
2719                 $body = $item['body'] ?? '';
2720                 $shared = BBCode::fetchShareAttributes($body);
2721                 if (!empty($shared['guid'])) {
2722                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2723                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2724                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2725                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2726                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2727                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2728                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2729                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2730                 } else {
2731                         $shared_uri_id = 0;
2732                         $shared_links = [];
2733                 }
2734                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links);
2735                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2736
2737                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2738                 self::putInCache($item);
2739                 $item['body'] = $body;
2740                 $s = $item["rendered-html"];
2741
2742                 // Compile eventual content filter reasons
2743                 $filter_reasons = [];
2744                 if (!$is_preview && public_contact() != $item['author-id']) {
2745                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2746                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2747                         }
2748
2749                         $item['attachments'] = $attachments;
2750
2751                         $hook_data = [
2752                                 'item' => $item,
2753                                 'filter_reasons' => $filter_reasons
2754                         ];
2755                         Hook::callAll('prepare_body_content_filter', $hook_data);
2756                         $filter_reasons = $hook_data['filter_reasons'];
2757                         unset($hook_data);
2758                 }
2759
2760                 $hook_data = [
2761                         'item' => $item,
2762                         'html' => $s,
2763                         'preview' => $is_preview,
2764                         'filter_reasons' => $filter_reasons
2765                 ];
2766                 Hook::callAll('prepare_body', $hook_data);
2767                 $s = $hook_data['html'];
2768                 unset($hook_data);
2769
2770                 if (!$attach) {
2771                         // Replace the blockquotes with quotes that are used in mails.
2772                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2773                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2774                         return $s;
2775                 }
2776
2777                 if (!empty($shared_attachments)) {
2778                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2779                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2780                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2781                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2782                 }
2783
2784                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2785                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2786                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2787
2788                 // Map.
2789                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2790                         $x = Map::byCoordinates(trim($item['coord']));
2791                         if ($x) {
2792                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2793                         }
2794                 }
2795
2796                 // Replace friendica image url size with theme preference.
2797                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2798                         $ps = $a->getThemeInfoValue('item_image_size');
2799                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2800                 }
2801
2802                 $s = HTML::applyContentFilter($s, $filter_reasons);
2803
2804                 $hook_data = ['item' => $item, 'html' => $s];
2805                 Hook::callAll('prepare_body_final', $hook_data);
2806
2807                 return $hook_data['html'];
2808         }
2809
2810         /**
2811          * Check if the body contains a link
2812          *
2813          * @param string $body
2814          * @param string $url
2815          * @param int    $type
2816          * @return bool
2817          */
2818         public static function containsLink(string $body, string $url, int $type = 0)
2819         {
2820                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2821                 $urlparts = parse_url($url);
2822                 unset($urlparts['query']);
2823                 unset($urlparts['fragment']);
2824                 $url = Network::unparseURL($urlparts);
2825
2826                 // Remove media links to only search in embedded content
2827                 // @todo Check images for image link, audio for audio links, ...
2828                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2829                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2830                 }
2831
2832                 if (strpos($body, $url)) {
2833                         return true;
2834                 }
2835                 foreach ([0, 1, 2] as $size) {
2836                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2837                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2838                                 return true;
2839                         }
2840                 }
2841                 return false;
2842         }
2843
2844         /**
2845          * Replace visual attachments in the body
2846          *
2847          * @param array $attachments
2848          * @param string $body
2849          * @return string modified body
2850          */
2851         private static function replaceVisualAttachments(array $attachments, string $body)
2852         {
2853                 DI::profiler()->startRecording('rendering');
2854
2855                 foreach ($attachments['visual'] as $attachment) {
2856                         if (!empty($attachment['preview'])) {
2857                                 $body = str_replace($attachment['preview'], Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE), $body);
2858                         } elseif ($attachment['filetype'] == 'image') {
2859                                 $body = str_replace($attachment['url'], Post\Media::getUrlForId($attachment['id']), $body);
2860                         }
2861                 }
2862                 DI::profiler()->stopRecording();
2863                 return $body;
2864         }
2865
2866         /**
2867          * Add visual attachments to the content
2868          *
2869          * @param array $attachments
2870          * @param array $item
2871          * @param string $content
2872          * @return string modified content
2873          */
2874         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2875         {
2876                 DI::profiler()->startRecording('rendering');
2877                 $leading = '';
2878                 $trailing = '';
2879
2880                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2881                 foreach ($attachments['visual'] as $attachment) {
2882                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
2883                                 continue;
2884                         }
2885
2886                         if (!empty($attachment['preview'])) {
2887                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2888                         } else {
2889                                 $preview_url = '';
2890                         }
2891
2892                         if (($attachment['filetype'] == 'video')) {
2893                                 /// @todo Move the template to /content as well
2894                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2895                                         '$video' => [
2896                                                 'id'      => $attachment['id'],
2897                                                 'src'     => $attachment['url'],
2898                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2899                                                 'preview' => $preview_url,
2900                                                 'mime'    => $attachment['mimetype'],
2901                                         ],
2902                                 ]);
2903                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
2904                                         $leading .= $media;
2905                                 } else {
2906                                         $trailing .= $media;
2907                                 }
2908                         } elseif ($attachment['filetype'] == 'audio') {
2909                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2910                                         '$audio' => [
2911                                                 'id'     => $attachment['id'],
2912                                                 'src'    => $attachment['url'],
2913                                                 'name'   => $attachment['name'] ?: $attachment['url'],
2914                                                 'mime'   => $attachment['mimetype'],
2915                                         ],
2916                                 ]);
2917                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
2918                                         $leading .= $media;
2919                                 } else {
2920                                         $trailing .= $media;
2921                                 }
2922                         } elseif ($attachment['filetype'] == 'image') {
2923                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2924                                         '$image' => [
2925                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
2926                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
2927                                                 'attachment' => $attachment,
2928                                         ],
2929                                 ]);
2930                                 // On Diaspora posts the attached pictures are leading
2931                                 if ($item['network'] == Protocol::DIASPORA) {
2932                                         $leading .= $media;
2933                                 } else {
2934                                         $trailing .= $media;
2935                                 }
2936                         }
2937                 }
2938
2939                 if ($shared) {
2940                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
2941                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
2942                 } else {
2943                         if ($leading != '') {
2944                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
2945                         }
2946
2947                         if ($trailing != '') {
2948                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
2949                         }
2950                 }
2951
2952                 DI::profiler()->stopRecording();
2953                 return $content;
2954         }
2955
2956         /**
2957          * Add link attachment to the content
2958          *
2959          * @param array  $attachments
2960          * @param string $body
2961          * @param string $content
2962          * @param bool   $shared
2963          * @param array  $ignore_links A list of URLs to ignore
2964          * @return string modified content
2965          */
2966         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links)
2967         {
2968                 DI::profiler()->startRecording('rendering');
2969                 // Don't show a preview when there is a visual attachment (audio or video)
2970                 $types = array_column($attachments['visual'], 'type');
2971                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
2972
2973                 if (!empty($attachments['link'])) {
2974                         foreach ($attachments['link'] as $link) {
2975                                 $found = false;
2976                                 foreach ($ignore_links as $ignore_link) {
2977                                         if (Strings::compareLink($link['url'], $ignore_link)) {
2978                                                 $found = true;
2979                                         }
2980                                 }
2981                                 // @todo Judge between the links to use the one with most information
2982                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
2983                                         (empty($attachment['name']) && !empty($link['name'])) ||
2984                                         (empty($attachment['description']) && !empty($link['description'])) ||
2985                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
2986                                         $attachment = $link;
2987                                 }
2988                         }
2989                 }
2990
2991                 if (!empty($attachment)) {
2992                         $data = [
2993                                 'after' => '',
2994                                 'author_name' => $attachment['author-name'] ?? '',
2995                                 'author_url' =>  $attachment['author-url'] ?? '',
2996                                 'description' => $attachment['description'] ?? '',
2997                                 'image' => '',
2998                                 'preview' => '',
2999                                 'provider_name' => $attachment['publisher-name'] ?? '',
3000                                 'provider_url' => $attachment['publisher-url'] ?? '',
3001                                 'text' => '',
3002                                 'title' => $attachment['name'] ?? '',
3003                                 'type' => 'link',
3004                                 'url' => $attachment['url']];
3005
3006                         if ($preview && !empty($attachment['preview'])) {
3007                                 if ($attachment['preview-width'] >= 500) {
3008                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3009                                 } else {
3010                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3011                                 }
3012                         }
3013
3014                         if (!empty($data['description']) && !empty($content)) {
3015                                 similar_text($data['description'], $content, $percent);
3016                         } else {
3017                                 $percent = 0;
3018                         }
3019
3020                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3021                                 $data['description'] = '';
3022                         }
3023
3024                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3025                                 $data['author_name'] = '';
3026                         }
3027
3028                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3029                                 $data['author_url'] = '';
3030                         }
3031                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3032                         $data = BBCode::getAttachmentData($match[1]);
3033                 }
3034                 DI::profiler()->stopRecording();
3035
3036                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3037                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3038                                 $parts = parse_url($data['url']);
3039                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3040                                         if (empty($data['provider_name'])) {
3041                                                 $data['provider_name'] = $parts['host'];
3042                                         }
3043                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3044                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3045
3046                                                 if (!empty($parts['port'])) {
3047                                                         $data['provider_url'] .= ':' . $parts['port'];
3048                                                 }
3049                                         }
3050                                 }
3051
3052                                 // @todo Use a template
3053                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3054                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3055                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3056                                         '$url'  => $data['url'],
3057                                         '$title' => $data['title'],
3058                                 ]);
3059                         } else {
3060                                 return $content;
3061                         }
3062
3063                         if ($shared) {
3064                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3065                         } else {
3066                                 return $content . $rendered;
3067                         }
3068                 }
3069                 return $content;
3070         }
3071
3072         /**
3073          * Add non visual attachments to the content
3074          *
3075          * @param array $attachments
3076          * @param array $item
3077          * @param string $content
3078          * @return string modified content
3079          */
3080         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3081         {
3082                 DI::profiler()->startRecording('rendering');
3083                 $trailing = '';
3084                 foreach ($attachments['additional'] as $attachment) {
3085                         if (strpos($item['body'], $attachment['url'])) {
3086                                 continue;
3087                         }
3088
3089                         $author = ['uid' => 0, 'id' => $item['author-id'],
3090                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3091                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3092
3093                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3094
3095                         if (!empty($attachment['size'])) {
3096                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3097                         }
3098
3099                         /// @todo Use a template
3100                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3101                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3102                 }
3103
3104                 if ($trailing != '') {
3105                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3106                 }
3107
3108                 DI::profiler()->stopRecording();
3109                 return $content;
3110         }
3111
3112         /**
3113          * get private link for item
3114          *
3115          * @param array $item
3116          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3117          * @throws \Exception
3118          */
3119         public static function getPlink($item)
3120         {
3121                 if (local_user()) {
3122                         $ret = [
3123                                 'href' => "display/" . $item['guid'],
3124                                 'orig' => "display/" . $item['guid'],
3125                                 'title' => DI::l10n()->t('View on separate page'),
3126                                 'orig_title' => DI::l10n()->t('View on separate page'),
3127                         ];
3128
3129                         if (!empty($item['plink'])) {
3130                                 $ret['href'] = DI::baseUrl()->remove($item['plink']);
3131                                 $ret['title'] = DI::l10n()->t('Link to source');
3132                         }
3133                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3134                         $ret = [
3135                                 'href' => $item['plink'],
3136                                 'orig' => $item['plink'],
3137                                 'title' => DI::l10n()->t('Link to source'),
3138                                 'orig_title' => DI::l10n()->t('Link to source'),
3139                         ];
3140                 } else {
3141                         $ret = [];
3142                 }
3143
3144                 return $ret;
3145         }
3146
3147         /**
3148          * Is the given item array a post that is sent as starting post to a forum?
3149          *
3150          * @param array $item
3151          * @param array $owner
3152          *
3153          * @return boolean "true" when it is a forum post
3154          */
3155         public static function isForumPost(array $item, array $owner = [])
3156         {
3157                 if (empty($owner)) {
3158                         $owner = User::getOwnerDataById($item['uid']);
3159                         if (empty($owner)) {
3160                                 return false;
3161                         }
3162                 }
3163
3164                 if (($item['author-id'] == $item['owner-id']) ||
3165                         ($owner['id'] == $item['contact-id']) ||
3166                         ($item['uri-id'] != $item['parent-uri-id']) ||
3167                         $item['origin']) {
3168                         return false;
3169                 }
3170
3171                 return Contact::isForum($item['contact-id']);
3172         }
3173
3174         /**
3175          * Search item id for given URI or plink
3176          *
3177          * @param string $uri
3178          * @param integer $uid
3179          *
3180          * @return integer item id
3181          */
3182         public static function searchByLink($uri, $uid = 0)
3183         {
3184                 $ssl_uri = str_replace('http://', 'https://', $uri);
3185                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3186
3187                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3188                 if (DBA::isResult($item)) {
3189                         return $item['id'];
3190                 }
3191
3192                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3193                 if (DBA::isResult($item)) {
3194                         return $item['id'];
3195                 }
3196
3197                 return 0;
3198         }
3199
3200         /**
3201          * Return the URI for a link to the post
3202          *
3203          * @param string $uri URI or link to post
3204          *
3205          * @return string URI
3206          */
3207         public static function getURIByLink(string $uri)
3208         {
3209                 $ssl_uri = str_replace('http://', 'https://', $uri);
3210                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3211
3212                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3213                 if (DBA::isResult($item)) {
3214                         return $item['uri'];
3215                 }
3216
3217                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3218                 if (DBA::isResult($item)) {
3219                         return $item['uri'];
3220                 }
3221
3222                 return '';
3223         }
3224
3225         /**
3226          * Fetches item for given URI or plink
3227          *
3228          * @param string $uri
3229          * @param integer $uid
3230          *
3231          * @return integer item id
3232          */
3233         public static function fetchByLink(string $uri, int $uid = 0)
3234         {
3235                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3236                 $item_id = self::searchByLink($uri, $uid);
3237                 if (!empty($item_id)) {
3238                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3239                         return $item_id;
3240                 }
3241
3242                 $hookData = [
3243                         'uri'     => $uri,
3244                         'uid'     => $uid,
3245                         'item_id' => null,
3246                 ];
3247
3248                 Hook::callAll('item_by_link', $hookData);
3249
3250                 if (isset($hookData['item_id'])) {
3251                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3252                 }
3253
3254                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3255                         $item_id = self::searchByLink($fetched_uri, $uid);
3256                 } else {
3257                         $item_id = Diaspora::fetchByURL($uri);
3258                 }
3259
3260                 if (!empty($item_id)) {
3261                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3262                         return $item_id;
3263                 }
3264
3265                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3266                 return 0;
3267         }
3268
3269         /**
3270          * Return share data from an item array (if the item is shared item)
3271          * We are providing the complete Item array, because at some time in the future
3272          * we hopefully will define these values not in the body anymore but in some item fields.
3273          * This function is meant to replace all similar functions in the system.
3274          *
3275          * @param array $item
3276          *
3277          * @return array with share information
3278          */
3279         public static function getShareArray($item)
3280         {
3281                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3282                         return [];
3283                 }
3284
3285                 $attribute_string = $matches[2];
3286                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3287                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3288                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3289                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3290                         }
3291                 }
3292                 return $attributes;
3293         }
3294
3295         /**
3296          * Fetch item information for shared items from the original items and adds it.
3297          *
3298          * @param array $item
3299          *
3300          * @return array item array with data from the original item
3301          */
3302         public static function addShareDataFromOriginal(array $item)
3303         {
3304                 $shared = self::getShareArray($item);
3305                 if (empty($shared)) {
3306                         return $item;
3307                 }
3308
3309                 // Real reshares always have got a GUID.
3310                 if (empty($shared['guid'])) {
3311                         return $item;
3312                 }
3313
3314                 $uid = $item['uid'] ?? 0;
3315
3316                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3317                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3318                 if (!DBA::isResult($shared_item)) {
3319                         if (empty($shared['link'])) {
3320                                 return $item;
3321                         }
3322
3323                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3324                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3325                         if (empty($id)) {
3326                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3327                                 return $item;
3328                         }
3329
3330                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3331                         if (!DBA::isResult($shared_item)) {
3332                                 return $item;
3333                         }
3334                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3335                 } else {
3336                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3337                 }
3338
3339                 if (!empty($shared_item['title'])) {
3340                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3341                         unset($shared_item['title']);
3342                 } else {
3343                         $body = $shared_item['body'];
3344                 }
3345
3346                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3347                 unset($shared_item['body']);
3348
3349                 return array_merge($item, $shared_item);
3350         }
3351
3352         /**
3353          * Check a prospective item array against user-level permissions
3354          *
3355          * @param array $item Expected keys: uri, gravity, and
3356          *                    author-link if is author-id is set,
3357          *                    owner-link if is owner-id is set,
3358          *                    causer-link if is causer-id is set.
3359          * @param int   $user_id Local user ID
3360          * @return bool
3361          * @throws \Exception
3362          */
3363         protected static function isAllowedByUser(array $item, int $user_id)
3364         {
3365                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3366                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3367                         return false;
3368                 }
3369
3370                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3371                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3372                         return false;
3373                 }
3374
3375                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3376                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3377                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3378                         return false;
3379                 }
3380
3381                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3382                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3383                         return false;
3384                 }
3385
3386                 return true;
3387         }
3388
3389         /**
3390          * Improve the data in shared posts
3391          *
3392          * @param array $item
3393          * @return string body
3394          */
3395         public static function improveSharedDataInBody(array $item)
3396         {
3397                 $shared = BBCode::fetchShareAttributes($item['body']);
3398                 if (empty($shared['link'])) {
3399                         return $item['body'];
3400                 }
3401
3402                 $id = self::fetchByLink($shared['link']);
3403                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3404                 if (!$id) {
3405                         return $item['body'];
3406                 }
3407
3408                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3409                 if (!DBA::isResult($shared_item)) {
3410                         return $item['body'];
3411                 }
3412
3413                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3414
3415                 if (!empty($shared_item['title'])) {
3416                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3417                 }
3418
3419                 $shared_content .= $shared_item['body'];
3420
3421                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3422                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3423                 return $item['body'];
3424         }
3425 }