src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, 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\System;
  31 use Friendica\Core\Worker;
  32 use Friendica\Database\DBA;
  33 use Friendica\DI;
  34 use Friendica\Protocol\Activity;
  35 use Friendica\Protocol\ActivityPub;
  36 use Friendica\Protocol\Delivery;
  37 use Friendica\Protocol\Diaspora;
  38 use Friendica\Util\DateTimeFormat;
  39 use Friendica\Util\Map;
  40 use Friendica\Util\Network;
  41 use Friendica\Util\Proxy;
  42 use Friendica\Util\Strings;
  43 use Friendica\Util\Temporal;
  44 use GuzzleHttp\Psr7\Uri;
  45 use LanguageDetection\Language;
  46
  47 class Item
  48 {
  49         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  50         const PT_ARTICLE = 0;
  51         const PT_NOTE = 1;
  52         const PT_PAGE = 2;
  53         const PT_IMAGE = 16;
  54         const PT_AUDIO = 17;
  55         const PT_VIDEO = 18;
  56         const PT_DOCUMENT = 19;
  57         const PT_EVENT = 32;
  58         const PT_POLL = 33;
  59         const PT_PERSONAL_NOTE = 128;
  60
  61         // Posting reasons (Why had a post been stored for a user?)
  62         const PR_NONE = 0;
  63         const PR_TAG = 64;
  64         const PR_TO = 65;
  65         const PR_CC = 66;
  66         const PR_BTO = 67;
  67         const PR_BCC = 68;
  68         const PR_FOLLOWER = 69;
  69         const PR_ANNOUNCEMENT = 70;
  70         const PR_COMMENT = 71;
  71         const PR_STORED = 72;
  72         const PR_GLOBAL = 73;
  73         const PR_RELAY = 74;
  74         const PR_FETCHED = 75;
  75         const PR_COMPLETION = 76;
  76         const PR_DIRECT = 77;
  77         const PR_ACTIVITY = 78;
  78         const PR_DISTRIBUTE = 79;
  79         const PR_PUSHED = 80;
  80         const PR_LOCAL = 81;
  81
  82         // system.accept_only_sharer setting values
  83         const COMPLETION_NONE    = 1;
  84         const COMPLETION_COMMENT = 0;
  85         const COMPLETION_LIKE    = 2;
  86
  87         // Field list that is used to display the items
  88         const DISPLAY_FIELDLIST = [
  89                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  90                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri', 'conversation',
  91                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  92                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  93                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  94                 'quote-uri', 'quote-uri-id', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  95                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-addr', 'author-uri-id',
  96                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated',
  97                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  98                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  99                 'writable', 'self', 'cid', 'alias',
 100                 'event-created', 'event-edited', 'event-start', 'event-finish',
 101                 'event-summary', 'event-desc', 'event-location', 'event-type',
 102                 'event-nofinish', 'event-ignore', 'event-id',
 103                 'question-id', 'question-multiple', 'question-voters', 'question-end-time',
 104                 'has-categories', 'has-media',
 105                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
 106         ];
 107
 108         // Field list that is used to deliver items via the protocols
 109         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 110                         'parent-guid', 'conversation', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 111                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 112                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 113                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 114                         'author-id', 'author-addr', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 115                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 116                         'thr-parent-id', 'parent-uri-id', 'quote-uri', 'quote-uri-id', 'postopts', 'pubmail',
 117                         'event-created', 'event-edited', 'event-start', 'event-finish',
 118                         'event-summary', 'event-desc', 'event-location', 'event-type',
 119                         'event-nofinish', 'event-ignore', 'event-id'];
 120
 121         // All fields in the item table
 122         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 123                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'conversation', 'vid',
 124                         'quote-uri', 'quote-uri-id', 'contact-id', 'wall', 'gravity', 'extid', 'psid',
 125                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 126                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 127                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 128                         'private', 'pubmail', 'visible', 'starred',
 129                         'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 130                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 131                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 132                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 133                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 134
 135         // List of all verbs that don't need additional content data.
 136         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 137         const ACTIVITIES = [
 138                 Activity::LIKE, Activity::DISLIKE,
 139                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 140                 Activity::FOLLOW,
 141                 Activity::ANNOUNCE];
 142
 143         // Privacy levels
 144         const PUBLIC = 0;
 145         const PRIVATE = 1;
 146         const UNLISTED = 2;
 147
 148         // Item weight for query ordering
 149         const GRAVITY_PARENT   = 0;
 150         const GRAVITY_ACTIVITY = 3;
 151         const GRAVITY_COMMENT  = 6;
 152         const GRAVITY_UNKNOWN  = 9;
 153
 154         /**
 155          * Update existing item entries
 156          *
 157          * @param array $fields    The fields that are to be changed
 158          * @param array $condition The condition for finding the item entries
 159          *
 160          * In the future we may have to change permissions as well.
 161          * Then we had to add the user id as third parameter.
 162          *
 163          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 164          *
 165          * @return integer|boolean number of affected rows - or "false" if there was an error
 166          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 167          */
 168         public static function update(array $fields, array $condition)
 169         {
 170                 if (empty($condition) || empty($fields)) {
 171                         return false;
 172                 }
 173
 174                 if (isset($fields['extid'])) {
 175                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 176                 }
 177
 178                 if (!empty($fields['verb'])) {
 179                         $fields['vid'] = Verb::getID($fields['verb']);
 180                 }
 181
 182                 if (!empty($fields['edited'])) {
 183                         $previous = Post::selectFirst(['edited'], $condition);
 184                 }
 185
 186                 $rows = Post::update($fields, $condition);
 187                 if (is_bool($rows)) {
 188                         return $rows;
 189                 }
 190
 191                 // We only need to call the line by line update for specific fields
 192                 if (empty($fields['body']) && empty($fields['file']) &&
 193                         empty($fields['attach']) && empty($fields['edited'])) {
 194                         return $rows;
 195                 }
 196
 197                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 198
 199                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network', 'quote-uri-id'], $condition);
 200
 201                 $notify_items = [];
 202
 203                 while ($item = DBA::fetch($items)) {
 204                         if (!empty($fields['body'])) {
 205                                 if (!empty($item['quote-uri-id'])) {
 206                                         $fields['body'] = BBCode::removeSharedData($fields['body']);
 207
 208                                         if (!empty($fields['raw-body'])) {
 209                                                 $fields['raw-body'] = BBCode::removeSharedData($fields['raw-body']);
 210                                         }
 211                                 }
 212
 213                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 214
 215                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 216
 217                                 // Remove all media attachments from the body and store them in the post-media table
 218                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 219                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 220                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 221
 222                                 Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body'], $fields['body'], $item['author-network']);
 223                                 Post\Content::update($item['uri-id'], $content_fields);
 224                         }
 225
 226                         if (!empty($fields['file'])) {
 227                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 228                         }
 229
 230                         if (!empty($fields['attach'])) {
 231                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 232                         }
 233
 234                         // We only need to notfiy others when it is an original entry from us.
 235                         // Only call the notifier when the item had been edited and records had been changed.
 236                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 237                                 $notify_items[] = $item['id'];
 238                         }
 239                 }
 240
 241                 DBA::close($items);
 242
 243                 foreach ($notify_items as $notify_item) {
 244                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 245                         Worker::add(Worker::PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 246                 }
 247
 248                 return $rows;
 249         }
 250
 251         /**
 252          * Delete an item and notify others about it - if it was ours
 253          *
 254          * @param array   $condition The condition for finding the item entries
 255          * @param integer $priority  Priority for the notification
 256          * @return void
 257          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 258          */
 259         public static function markForDeletion(array $condition, int $priority = Worker::PRIORITY_HIGH)
 260         {
 261                 $items = Post::select(['id'], $condition);
 262                 while ($item = Post::fetch($items)) {
 263                         self::markForDeletionById($item['id'], $priority);
 264                 }
 265                 DBA::close($items);
 266         }
 267
 268         /**
 269          * Delete an item for an user and notify others about it - if it was ours
 270          *
 271          * @param array   $condition The condition for finding the item entries
 272          * @param integer $uid       User who wants to delete this item
 273          * @return void
 274          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 275          */
 276         public static function deleteForUser(array $condition, int $uid)
 277         {
 278                 if ($uid == 0) {
 279                         return;
 280                 }
 281
 282                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 283                 while ($item = Post::fetch($items)) {
 284                         if (in_array($item['uid'], [$uid, 0])) {
 285                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 286                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 287                         }
 288
 289                         if ($item['uid'] == $uid) {
 290                                 self::markForDeletionById($item['id'], Worker::PRIORITY_HIGH);
 291                         } elseif ($item['uid'] != 0) {
 292                                 Logger::warning('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 293                         }
 294                 }
 295                 DBA::close($items);
 296         }
 297
 298         /**
 299          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 300          *
 301          * @param integer $item_id
 302          * @param integer $priority Priority for the notification
 303          * @return boolean success
 304          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 305          */
 306         public static function markForDeletionById(int $item_id, int $priority = Worker::PRIORITY_HIGH): bool
 307         {
 308                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 309                 // locate item to be deleted
 310                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 311                         'deleted', 'resource-id', 'event-id',
 312                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 313                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 314                 if (!DBA::isResult($item)) {
 315                         Logger::info('Item not found.', ['id' => $item_id]);
 316                         return false;
 317                 }
 318
 319                 if ($item['deleted']) {
 320                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 321                         return false;
 322                 }
 323
 324                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 325                 if (!DBA::isResult($parent)) {
 326                         $parent = ['origin' => false];
 327                 }
 328
 329                 // clean up categories and tags so they don't end up as orphans
 330                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 331
 332                 /*
 333                  * If item is a link to a photo resource, nuke all the associated photos
 334                  * (visitors will not have photo resources)
 335                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 336                  * generate a resource-id and therefore aren't intimately linked to the item.
 337                  */
 338                 /// @TODO: this should first check if photo is used elsewhere
 339                 if ($item['resource-id']) {
 340                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 341                 }
 342
 343                 // If item is a link to an event, delete the event.
 344                 if (intval($item['event-id'])) {
 345                         Event::delete($item['event-id']);
 346                 }
 347
 348                 // If item has attachments, drop them
 349                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 350                 foreach($attachments as $attachment) {
 351                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 352                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 353                         }
 354                 }
 355
 356                 // Set the item to "deleted"
 357                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 358                 Post::update($item_fields, ['id' => $item['id']]);
 359
 360                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 361
 362                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 363                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 364                 }
 365
 366                 Post\DeliveryData::delete($item['uri-id']);
 367
 368                 // If it's the parent of a comment thread, kill all the kids
 369                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 370                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 371                 }
 372
 373                 // Is it our comment and/or our thread?
 374                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 375                         // When we delete the original post we will delete all existing copies on the server as well
 376                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 377
 378                         // send the notification upstream/downstream
 379                         if ($priority) {
 380                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 381                         }
 382                 } elseif ($item['uid'] != 0) {
 383                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 384                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 385                 }
 386
 387                 DI::notify()->deleteForItem($item['uri-id']);
 388                 DI::notification()->deleteForItem($item['uri-id']);
 389
 390                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 391
 392                 return true;
 393         }
 394
 395         /**
 396          * Get guid from given item record
 397          *
 398          * @param array $item Item record
 399          * @param bool Whether to notify (?)
 400          * @return string Guid
 401          */
 402         public static function guid(array $item, bool $notify): string
 403         {
 404                 if (!empty($item['guid'])) {
 405                         return trim($item['guid']);
 406                 }
 407
 408                 if ($notify) {
 409                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 410                         // We add the hash of our own host because our host is the original creator of the post.
 411                         $prefix_host = DI::baseUrl()->getHostname();
 412                 } else {
 413                         $prefix_host = '';
 414
 415                         // We are only storing the post so we create a GUID from the original hostname.
 416                         if (!empty($item['author-link'])) {
 417                                 $parsed = parse_url($item['author-link']);
 418                                 if (!empty($parsed['host'])) {
 419                                         $prefix_host = $parsed['host'];
 420                                 }
 421                         }
 422
 423                         if (empty($prefix_host) && !empty($item['plink'])) {
 424                                 $parsed = parse_url($item['plink']);
 425                                 if (!empty($parsed['host'])) {
 426                                         $prefix_host = $parsed['host'];
 427                                 }
 428                         }
 429
 430                         if (empty($prefix_host) && !empty($item['uri'])) {
 431                                 $parsed = parse_url($item['uri']);
 432                                 if (!empty($parsed['host'])) {
 433                                         $prefix_host = $parsed['host'];
 434                                 }
 435                         }
 436
 437                         // Is it in the format data@host.tld? - Used for mail contacts
 438                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 439                                 $mailparts = explode('@', $item['author-link']);
 440                                 $prefix_host = array_pop($mailparts);
 441                         }
 442                 }
 443
 444                 if (!empty($item['plink'])) {
 445                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 446                 } elseif (!empty($item['uri'])) {
 447                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 448                 } else {
 449                         $guid = System::createUUID(hash('crc32', $prefix_host));
 450                 }
 451
 452                 return $guid;
 453         }
 454
 455         /**
 456          * Returns contact id from given item record
 457          *
 458          * @param array $item Item record
 459          * @return int Contact id
 460          */
 461         private static function contactId(array $item): int
 462         {
 463                 if ($item['uid'] == 0) {
 464                         return $item['author-id'];
 465                 }
 466
 467                 if ($item['origin']) {
 468                         $owner = User::getOwnerDataById($item['uid']);
 469                         return $owner['id'];
 470                 }
 471
 472                 if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $item['uid'], true)) {
 473                         $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $item['uid']);
 474                         if (!empty($cdata['user'])) {
 475                                 return $cdata['user'];
 476                         }
 477                 }
 478
 479                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 480                         if (Contact::isSharingByURL($item['owner-link'], $item['uid'], true)) {
 481                                 $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 482                         } else {
 483                                 $contact_id = Contact::getIdForURL($item['owner-link']);
 484                         }
 485                         if (!empty($contact_id)) {
 486                                 return $contact_id;
 487                         }
 488                 }
 489
 490                 if (Contact::isSharingByURL($item['author-link'], $item['uid'], true)) {
 491                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 492                 } else {
 493                         $contact_id = Contact::getIdForURL($item['author-link']);
 494                 }
 495
 496                 if (!empty($contact_id)) {
 497                         return $contact_id;
 498                 }
 499
 500                 Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $item['uid'], 'item' => $item]);
 501                 $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $item['uid']]);
 502                 return $self['id'];
 503         }
 504
 505         /**
 506          * Write an item array into a spool file to be inserted later.
 507          * This command is called whenever there are issues storing an item.
 508          *
 509          * @param array $item The item fields that are to be inserted
 510          * @throws \Exception
 511          */
 512         private static function spool(array $item)
 513         {
 514                 // Now we store the data in the spool directory
 515                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 516                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 517
 518                 $spoolpath = System::getSpoolPath();
 519                 if ($spoolpath != '') {
 520                         $spool = $spoolpath . '/' . $file;
 521
 522                         file_put_contents($spool, json_encode($item));
 523                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 524                 }
 525         }
 526
 527         /**
 528          * Check if the item array is a duplicate
 529          *
 530          * @param array $item Item record
 531          * @return boolean is it a duplicate?
 532          */
 533         private static function isDuplicate(array $item): bool
 534         {
 535                 // Checking if there is already an item with the same guid
 536                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 537                 if (Post::exists($condition)) {
 538                         Logger::notice('Found already existing item', $condition);
 539                         return true;
 540                 }
 541
 542                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 543                         'network' => [$item['network'], Protocol::DFRN]];
 544                 if (Post::exists($condition)) {
 545                         Logger::notice('duplicated item with the same uri found.', $condition);
 546                         return true;
 547                 }
 548
 549                 // On Friendica and Diaspora the GUID is unique
 550                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 551                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 552                         if (Post::exists($condition)) {
 553                                 Logger::notice('duplicated item with the same guid found.', $condition);
 554                                 return true;
 555                         }
 556                 } elseif ($item['network'] == Protocol::OSTATUS) {
 557                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 558                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 559                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 560                         if (Post::exists($condition)) {
 561                                 Logger::notice('duplicated item with the same body found.', $item);
 562                                 return true;
 563                         }
 564                 }
 565
 566                 /*
 567                  * Check for already added items.
 568                  * There is a timing issue here that sometimes creates double postings.
 569                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 570                  */
 571                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 572                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 573                         return true;
 574                 }
 575
 576                 return false;
 577         }
 578
 579         /**
 580          * Check if the item array is valid
 581          *
 582          * @param array $item Item record
 583          * @return boolean item is valid
 584          */
 585         public static function isValid(array $item): bool
 586         {
 587                 // When there is no content then we don't post it
 588                 if (($item['body'] . $item['title'] == '') && empty($item['quote-uri-id']) && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 589                         Logger::notice('No body, no title.');
 590                         return false;
 591                 }
 592
 593                 if (!empty($item['uid'])) {
 594                         $owner = User::getOwnerDataById($item['uid'], false);
 595                         if (!$owner) {
 596                                 Logger::warning('Missing item user owner data', ['uid' => $item['uid']]);
 597                                 return false;
 598                         }
 599
 600                         if ($owner['account_expired'] || $owner['account_removed']) {
 601                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 602                                 return false;
 603                         }
 604                 }
 605
 606                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 607                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 608                         return false;
 609                 }
 610
 611                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 612                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 613                         return false;
 614                 }
 615
 616                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 617                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 618                         return false;
 619                 }
 620
 621                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 622                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 623                         return false;
 624                 }
 625
 626                 if ($item['verb'] == Activity::FOLLOW) {
 627                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 628                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 629                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 630                                 return false;
 631                         }
 632
 633                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 634                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 635                         if (Post::exists($condition)) {
 636                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 637                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 638                                 return false;
 639                         }
 640                 }
 641
 642                 return true;
 643         }
 644
 645         /**
 646          * Check if the item array is too old
 647          *
 648          * @param array $item Item record
 649          * @return boolean item is too old
 650          */
 651         public static function isTooOld(array $item): bool
 652         {
 653                 // check for create date and expire time
 654                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 655
 656                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 657                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 658                         $expire_interval = $user['expire'];
 659                 }
 660
 661                 if (($expire_interval > 0) && !empty($item['created'])) {
 662                         $expire_date = time() - ($expire_interval * 86400);
 663                         $created_date = strtotime($item['created']);
 664                         if ($created_date < $expire_date) {
 665                                 Logger::notice('Item created before expiration interval.', [
 666                                         'created' => date('c', $created_date),
 667                                         'expired' => date('c', $expire_date),
 668                                         '$item' => $item
 669                                 ]);
 670                                 return true;
 671                         }
 672                 }
 673
 674                 return false;
 675         }
 676
 677         /**
 678          * Return the id of the given item array if it has been stored before
 679          *
 680          * @param array $item Item record
 681          * @return integer Item id or zero on error
 682          */
 683         private static function getDuplicateID(array $item): int
 684         {
 685                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 686                         $condition = ['`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 687                                 $item['uri-id'],
 688                                 $item['uid'],
 689                                 Protocol::ACTIVITYPUB,
 690                                 Protocol::DIASPORA,
 691                                 Protocol::DFRN,
 692                                 Protocol::OSTATUS
 693                         ];
 694                         $existing = Post::selectFirst(['id', 'network'], $condition);
 695                         if (DBA::isResult($existing)) {
 696                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 697                                 if ($item['uid'] != 0) {
 698                                         Logger::notice('Item already existed for user', [
 699                                                 'uri-id' => $item['uri-id'],
 700                                                 'uid' => $item['uid'],
 701                                                 'network' => $item['network'],
 702                                                 'existing_id' => $existing['id'],
 703                                                 'existing_network' => $existing['network']
 704                                         ]);
 705                                 }
 706
 707                                 return $existing['id'];
 708                         }
 709                 }
 710                 return 0;
 711         }
 712
 713         /**
 714          * Fetch the uri-id of the parent for the given uri-id
 715          *
 716          * @param integer $uriid
 717          * @return integer
 718          */
 719         public static function getParent(int $uriid): int
 720         {
 721                 $thread_parent = Post::selectFirstPost(['thr-parent-id', 'gravity'], ['uri-id' => $uriid]);
 722                 if (empty($thread_parent)) {
 723                         return 0;
 724                 }
 725
 726                 if ($thread_parent['gravity'] == Item::GRAVITY_PARENT) {
 727                         return $uriid;
 728                 }
 729
 730                 return self::getParent($thread_parent['thr-parent-id']);
 731         }
 732
 733         /**
 734          * Fetch top-level parent data for the given item array
 735          *
 736          * @param array $item
 737          * @return array item array with parent data
 738          * @throws \Exception
 739          */
 740         private static function getTopLevelParent(array $item): array
 741         {
 742                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 743                         'uri-id', 'parent-uri-id',
 744                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 745                         'wall', 'private', 'origin', 'author-id'];
 746                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 747                 $params = ['order' => ['id' => false]];
 748                 $parent = Post::selectFirst($fields, $condition, $params);
 749
 750                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 751                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 752                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 753                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 754                         }
 755                         if ($stored) {
 756                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 757                                 $parent = Post::selectFirst($fields, $condition, $params);
 758                         }
 759                 }
 760
 761                 if (!DBA::isResult($parent)) {
 762                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'callstack' => System::callstack(20)]);
 763                         return [];
 764                 }
 765
 766                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 767                         return $parent;
 768                 }
 769
 770                 $condition = ['uri-id' => $parent['parent-uri-id'],
 771                         'parent-uri-id' => $parent['parent-uri-id'],
 772                         'uid' => $parent['uid']];
 773                 $params = ['order' => ['id' => false]];
 774                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 775
 776                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 777                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 778                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 779                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 780                 }
 781
 782                 if (!DBA::isResult($toplevel_parent)) {
 783                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 784                         return [];
 785                 }
 786
 787                 return $toplevel_parent;
 788         }
 789
 790         /**
 791          * Get the gravity for the given item array
 792          *
 793          * @param array $item
 794          * @return integer gravity
 795          */
 796         private static function getGravity(array $item): int
 797         {
 798                 $activity = DI::activity();
 799
 800                 if (isset($item['gravity'])) {
 801                         return intval($item['gravity']);
 802                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 803                         return self::GRAVITY_PARENT;
 804                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 805                         return self::GRAVITY_COMMENT;
 806                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 807                         return self::GRAVITY_ACTIVITY;
 808                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 809                         return self::GRAVITY_ACTIVITY;
 810                 }
 811
 812                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 813                 return self::GRAVITY_UNKNOWN;   // Should not happen
 814         }
 815
 816         private static function prepareOriginPost(array $item): array
 817         {
 818                 $item = DI::contentItem()->initializePost($item);
 819                 $item = DI::contentItem()->finalizePost($item);
 820
 821                 return $item;
 822         }
 823
 824         /**
 825          * Inserts item record
 826          *
 827          * @param array $item Item array to be inserted
 828          * @param int   $notify Notification (type?)
 829          * @param bool  $post_local (???)
 830          * @return int Zero means error, otherwise primary key (id) is being returned
 831          */
 832         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 833         {
 834                 $orig_item = $item;
 835
 836                 $priority = Worker::PRIORITY_HIGH;
 837
 838                 // If it is a posting where users should get notifications, then define it as wall posting
 839                 if ($notify) {
 840                         $item = self::prepareOriginPost($item);
 841
 842                         if (is_int($notify) && in_array($notify, Worker::PRIORITIES)) {
 843                                 $priority = $notify;
 844                         }
 845                 } else {
 846                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 847                 }
 848
 849                 $uid = intval($item['uid']);
 850
 851                 $item['guid'] = self::guid($item, $notify);
 852                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 853
 854                 // Store URI data
 855                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 856
 857                 // Backward compatibility: parent-uri used to be the direct parent uri.
 858                 // If it is provided without a thr-parent, it probably is the old behavior.
 859                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 860                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 861                         $item['parent-uri'] = $item['thr-parent'];
 862                 }
 863
 864                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 865                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 866
 867                 // Store conversation data
 868                 $source = $item['source'] ?? '';
 869                 unset($item['conversation-uri']);
 870                 unset($item['conversation-href']);
 871                 unset($item['source']);
 872
 873                 /*
 874                  * Do we already have this item?
 875                  * We have to check several networks since Friendica posts could be repeated
 876                  * via OStatus (maybe Diasporsa as well)
 877                  */
 878                 $duplicate = self::getDuplicateID($item);
 879                 if ($duplicate) {
 880                         return $duplicate;
 881                 }
 882
 883                 // Additional duplicate checks
 884                 /// @todo Check why the first duplication check returns the item number and the second a 0
 885                 if (self::isDuplicate($item)) {
 886                         return 0;
 887                 }
 888
 889                 if (!isset($item['post-type'])) {
 890                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 891                 }
 892
 893                 $item['wall']          = intval($item['wall'] ?? 0);
 894                 $item['extid']         = trim($item['extid'] ?? '');
 895                 $item['author-name']   = trim($item['author-name'] ?? '');
 896                 $item['author-link']   = trim($item['author-link'] ?? '');
 897                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 898                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 899                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 900                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 901                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 902                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 903                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 904                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 905                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 906                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 907                 $item['location']      = trim($item['location'] ?? '');
 908                 $item['coord']         = trim($item['coord'] ?? '');
 909                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 910                 $item['deleted']       = 0;
 911                 $item['verb']          = trim($item['verb'] ?? '');
 912                 $item['object-type']   = trim($item['object-type'] ?? '');
 913                 $item['object']        = trim($item['object'] ?? '');
 914                 $item['target-type']   = trim($item['target-type'] ?? '');
 915                 $item['target']        = trim($item['target'] ?? '');
 916                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 917                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 918                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 919                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 920                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 921                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 922                 $item['body']          = trim($item['body'] ?? '');
 923                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 924                 $item['app']           = trim($item['app'] ?? '');
 925                 $item['origin']        = intval($item['origin'] ?? 0);
 926                 $item['postopts']      = trim($item['postopts'] ?? '');
 927                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 928                 $item['event-id']      = intval($item['event-id'] ?? 0);
 929                 $item['inform']        = trim($item['inform'] ?? '');
 930                 $item['file']          = trim($item['file'] ?? '');
 931
 932                 // Communities aren't working with the Diaspora protoccol
 933                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 934                         $user = User::getById($uid, ['account-type']);
 935                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 936                                 Logger::info('Community posts are not supported via Diaspora');
 937                                 return 0;
 938                         }
 939                 }
 940
 941                 // Items cannot be stored before they happen ...
 942                 if ($item['created'] > DateTimeFormat::utcNow()) {
 943                         $item['created'] = DateTimeFormat::utcNow();
 944                 }
 945
 946                 // We haven't invented time travel by now.
 947                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 948                         $item['edited'] = DateTimeFormat::utcNow();
 949                 }
 950
 951                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 952
 953                 $item['gravity'] = self::getGravity($item);
 954
 955                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 956                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 957                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 958
 959                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 960                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 961                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 962
 963                 $item['post-reason'] = self::getPostReason($item);
 964
 965                 // Ensure that there is an avatar cache
 966                 Contact::checkAvatarCache($item['author-id']);
 967                 Contact::checkAvatarCache($item['owner-id']);
 968
 969                 $item['contact-id'] = self::contactId($item);
 970
 971                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 972                         empty($item['origin']) && self::isTooOld($item)) {
 973                         Logger::info('Item is too old', ['item' => $item]);
 974                         return 0;
 975                 }
 976
 977                 if (!self::isValid($item)) {
 978                         return 0;
 979                 }
 980
 981                 if ($item['gravity'] !== self::GRAVITY_PARENT) {
 982                         $toplevel_parent = self::getTopLevelParent($item);
 983                         if (empty($toplevel_parent)) {
 984                                 return 0;
 985                         }
 986
 987                         $parent_id             = $toplevel_parent['id'];
 988                         $item['parent-uri']    = $toplevel_parent['uri'];
 989                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 990                         $item['deleted']       = $toplevel_parent['deleted'];
 991                         $item['wall']          = $toplevel_parent['wall'];
 992
 993                         // Reshares have to keep their permissions to allow forums to work
 994                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 995                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 996                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 997                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 998                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 999                         }
1000
1001                         $parent_origin         = $toplevel_parent['origin'];
1002
1003                         // Don't federate received participation messages
1004                         if ($item['verb'] != Activity::FOLLOW) {
1005                                 $item['wall'] = $toplevel_parent['wall'];
1006                         } else {
1007                                 $item['wall'] = false;
1008                                 // Participations are technical messages, so they are set to "seen" automatically
1009                                 $item['unseen'] = false;
1010                         }
1011
1012                         /*
1013                          * If the parent is private, force privacy for the entire conversation
1014                          * This differs from the above settings as it subtly allows comments from
1015                          * email correspondents to be private even if the overall thread is not.
1016                          */
1017                         if ($toplevel_parent['private']) {
1018                                 $item['private'] = $toplevel_parent['private'];
1019                         }
1020
1021                         // If its a post that originated here then tag the thread as "mention"
1022                         if ($item['origin'] && $item['uid']) {
1023                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1024                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1025                         }
1026
1027                         // Update the contact relations
1028                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1029                 } else {
1030                         $parent_id = 0;
1031                         $parent_origin = $item['origin'];
1032
1033                         if ($item['wall'] && empty($item['conversation'])) {
1034                                 $item['conversation'] = $item['parent-uri'] . '#context';
1035                         }
1036                 }
1037
1038                 if ($notify) {
1039                         if (Photo::setPermissionFromBody($item['body'], $item['uid'], $item['contact-id'], $item['allow_cid'], $item['allow_gid'], $item['deny_cid'], $item['deny_gid'])) {
1040                                 $item['object-type'] = Activity\ObjectType::IMAGE;
1041                         }
1042
1043                         $item = DI::contentItem()->moveAttachmentsFromBodyToAttach($item);
1044                 }
1045
1046                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1047                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1048
1049                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1050                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1051                 }
1052
1053                 // Is this item available in the global items (with uid=0)?
1054                 if ($item['uid'] == 0) {
1055                         $item['global'] = true;
1056
1057                         // Set the global flag on all items if this was a global item entry
1058                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1059                 } else {
1060                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1061                 }
1062
1063                 // ACL settings
1064                 if (!empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1065                         $item['private'] = self::PRIVATE;
1066                 }
1067
1068                 if ($notify && $post_local) {
1069                         $item['edit'] = false;
1070                         $item['parent'] = $parent_id;
1071
1072                         // Trigger automatic reactions for addons
1073                         if (!isset($item['api_source'])) {
1074                                 $item['api_source'] = true;
1075                         }
1076
1077                         // We have to tell the hooks who we are - this really should be improved
1078                         if (!DI::userSession()->getLocalUserId()) {
1079                                 $_SESSION['authenticated'] = true;
1080                                 $_SESSION['uid'] = $uid;
1081                                 $dummy_session = true;
1082                         } else {
1083                                 $dummy_session = false;
1084                         }
1085
1086                         Hook::callAll('post_local', $item);
1087
1088                         if ($dummy_session) {
1089                                 unset($_SESSION['authenticated']);
1090                                 unset($_SESSION['uid']);
1091                         }
1092                 } elseif (!$notify) {
1093                         Hook::callAll('post_remote', $item);
1094                 }
1095
1096                 if (!empty($item['cancel'])) {
1097                         Logger::notice('post cancelled by addon.');
1098                         return 0;
1099                 }
1100
1101                 if (empty($item['vid']) && !empty($item['verb'])) {
1102                         $item['vid'] = Verb::getID($item['verb']);
1103                 }
1104
1105                 // Creates or assigns the permission set
1106                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1107                         DI::permissionSetFactory()->createFromString(
1108                                 $item['uid'],
1109                                 $item['allow_cid'],
1110                                 $item['allow_gid'],
1111                                 $item['deny_cid'],
1112                                 $item['deny_gid']
1113                 ))->id;
1114
1115                 if (!empty($item['extid'])) {
1116                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1117                 }
1118
1119                 if ($item['verb'] == Activity::ANNOUNCE) {
1120                         self::setOwnerforResharedItem($item);
1121                 }
1122
1123                 if (isset($item['attachments'])) {
1124                         foreach ($item['attachments'] as $attachment) {
1125                                 $attachment['uri-id'] = $item['uri-id'];
1126                                 Post\Media::insert($attachment);
1127                         }
1128                         unset($item['attachments']);
1129                 }
1130
1131                 if (empty($item['quote-uri-id'])) {
1132                         $quote_id = self::getQuoteUriId($item['body']);
1133                         if (!empty($quote_id)) {
1134                                 // This is one of these "should not happen" situations.
1135                                 // The protocol implementations should already have done this job.
1136                                 Logger::notice('Quote-uri-id detected in post', ['id' => $quote_id, 'guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'callstack' => System::callstack(20)]);
1137                                 $item['quote-uri-id'] = $quote_id;
1138                         }
1139                 }
1140
1141                 if (!empty($item['quote-uri-id'])) {
1142                         $item['raw-body'] = BBCode::removeSharedData($item['raw-body']);
1143                         $item['body']     = BBCode::removeSharedData($item['body']);
1144                 }
1145
1146                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1147
1148                 // Remove all media attachments from the body and store them in the post-media table
1149                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1150                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1151
1152                 $author = Contact::getById($item['author-id'], ['network']);
1153                 Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body'], $item['body'], $author['network'] ?? '');
1154
1155                 // Check for hashtags in the body and repair or add hashtag links
1156                 $item['body'] = self::setHashtags($item['body']);
1157
1158                 $item['language'] = self::getLanguage($item);
1159
1160                 $notify_type = Delivery::POST;
1161
1162                 // Filling item related side tables
1163                 if (!empty($item['attach'])) {
1164                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1165                 }
1166
1167                 if (empty($item['event-id'])) {
1168                         unset($item['event-id']);
1169
1170                         $ev = Event::fromBBCode($item['body']);
1171                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1172                                 Logger::info('Event found.');
1173                                 $ev['cid']       = $item['contact-id'];
1174                                 $ev['uid']       = $item['uid'];
1175                                 $ev['uri']       = $item['uri'];
1176                                 $ev['edited']    = $item['edited'];
1177                                 $ev['private']   = $item['private'];
1178                                 $ev['guid']      = $item['guid'];
1179                                 $ev['plink']     = $item['plink'];
1180                                 $ev['network']   = $item['network'];
1181                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1182                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1183                                 $ev['source']    = $item['source'] ?? '';
1184
1185                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1186                                 if (DBA::isResult($event)) {
1187                                         $ev['id'] = $event['id'];
1188                                 }
1189
1190                                 $event_id = Event::store($ev);
1191                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1192
1193                                 Logger::info('Event was stored', ['id' => $event_id]);
1194                         }
1195                 }
1196
1197                 if (empty($item['causer-id'])) {
1198                         unset($item['causer-id']);
1199                 }
1200
1201                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1202                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1203                         if (!empty($content_warning) && empty($item['content-warning'])) {
1204                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1205                         }
1206                 }
1207
1208                 Post::insert($item['uri-id'], $item);
1209
1210                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1211                         Post\Thread::insert($item['uri-id'], $item);
1212                 }
1213
1214                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1215                         Post\Content::insert($item['uri-id'], $item);
1216                 }
1217
1218                 $item['parent'] = $parent_id;
1219
1220                 // Create Diaspora signature
1221                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != self::GRAVITY_PARENT)) {
1222                         $signed = Diaspora::createCommentSignature($item);
1223                         if (!empty($signed)) {
1224                                 $item['diaspora_signed_text'] = json_encode($signed);
1225                         }
1226                 }
1227
1228                 if (!empty($item['diaspora_signed_text'])) {
1229                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1230                 }
1231
1232                 // Attached file links
1233                 if (!empty($item['file'])) {
1234                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1235                 }
1236
1237                 // Delivery relevant data
1238                 $delivery_data = Post\DeliveryData::extractFields($item);
1239
1240                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1241                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1242                 }
1243
1244                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1245                 if (!Tag::existsForPost($item['uri-id'])) {
1246                         Tag::storeFromBody($item['uri-id'], $item['body']);
1247                 }
1248
1249                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1250                 if (Post::exists($condition)) {
1251                         Logger::notice('Item is already inserted - aborting', $condition);
1252                         return 0;
1253                 }
1254
1255                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1256                 if (!$post_user_id) {
1257                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1258                         return 0;
1259                 }
1260
1261                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1262                         $item['post-user-id'] = $post_user_id;
1263                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1264                 }
1265
1266                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1267
1268                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1269                 if (!DBA::isResult($posted_item)) {
1270                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1271                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1272                         self::spool($orig_item);
1273                         return 0;
1274                 }
1275
1276                 // update the commented timestamp on the parent
1277                 if (DI::config()->get('system', 'like_no_comment')) {
1278                         // Update when it is a comment
1279                         $update_commented = in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]);
1280                 } else {
1281                         // Update when it isn't a follow or tag verb
1282                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1283                 }
1284
1285                 if ($update_commented) {
1286                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1287                 } else {
1288                         $fields = ['changed' => DateTimeFormat::utcNow()];
1289                 }
1290
1291                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1292
1293                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1294                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1295                         // Get the user information for the logging
1296                         $user = User::getById($uid);
1297
1298                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1299                         return 0;
1300                 }
1301
1302                 if ($notify) {
1303                         DI::contentItem()->postProcessPost($posted_item);
1304                 } else {
1305                         Hook::callAll('post_remote_end', $posted_item);
1306                 }
1307
1308                 if ($posted_item['gravity'] === self::GRAVITY_PARENT) {
1309                         self::addShadow($post_user_id);
1310                 } else {
1311                         self::addShadowPost($post_user_id);
1312                 }
1313
1314                 self::updateContact($posted_item);
1315
1316                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1317
1318                 // Distribute items to users who subscribed to their tags
1319                 self::distributeByTags($posted_item);
1320
1321                 // Automatically reshare the item if the "remote_self" option is selected
1322                 self::autoReshare($posted_item);
1323
1324                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1325
1326                 if ($transmit) {
1327                         if ($posted_item['uid'] && Contact\User::isBlocked($posted_item['author-id'], $posted_item['uid'])) {
1328                                 Logger::info('Message from blocked author will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['author-id']]);
1329                                 $transmit = false;
1330                         }
1331                         if ($transmit && $posted_item['uid'] && Contact\User::isBlocked($posted_item['owner-id'], $posted_item['uid'])) {
1332                                 Logger::info('Message from blocked owner will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['owner-id']]);
1333                                 $transmit = false;
1334                         }
1335                         if ($transmit && !empty($posted_item['causer-id']) && $posted_item['uid'] && Contact\User::isBlocked($posted_item['causer-id'], $posted_item['uid'])) {
1336                                 Logger::info('Message from blocked causer will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['causer-id']]);
1337                                 $transmit = false;
1338                         }
1339
1340                         // Don't relay participation messages
1341                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1342                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1343                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1344                                 $transmit = false;
1345                         }
1346                 }
1347
1348                 if (!empty($source) && ($transmit || DI::config()->get('debug', 'store_source'))) {
1349                         Post\Activity::insert($item['uri-id'], $source);
1350                 }
1351
1352                 if ($transmit) {
1353                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1354                 }
1355
1356                 // Fill the cache with the rendered content.
1357                 if (in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1358                         self::updateDisplayCache($posted_item['uri-id']);
1359                 }
1360
1361                 return $post_user_id;
1362         }
1363
1364         /**
1365          * Fetch the post reason for a given item array
1366          *
1367          * @param array $item
1368          *
1369          * @return integer
1370          */
1371         public static function getPostReason(array $item): int
1372         {
1373                 $actor = ($item['gravity'] == self::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1374                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1375                         return self::PR_FOLLOWER;
1376                 }
1377
1378                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1379                         return self::PR_LOCAL;
1380                 }
1381
1382                 return $item['post-reason'] ?? self::PR_NONE;
1383         }
1384
1385         /**
1386          * Update the display cache
1387          *
1388          * @param integer $uri_id
1389          * @return void
1390          */
1391         public static function updateDisplayCache(int $uri_id)
1392         {
1393                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1394                 self::prepareBody($item, false, false, true);
1395         }
1396
1397         /**
1398          * Change the owner of a parent item if it had been shared by a forum
1399          *
1400          * (public) forum posts in the new format consist of the regular post by the author
1401          * followed by an announce message sent from the forum account.
1402          * Changing the owner helps in grouping forum posts.
1403          *
1404          * @param array $item
1405          * @return void
1406          */
1407         private static function setOwnerforResharedItem(array $item)
1408         {
1409                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1410                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1411                 if (!DBA::isResult($parent)) {
1412                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1413                         return;
1414                 }
1415
1416                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1417                 if (!DBA::isResult($author)) {
1418                         Logger::error('Author not found', ['id' => $item['author-id']]);
1419                         return;
1420                 }
1421
1422                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1423                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1424
1425                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1426                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1427                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1428                         return;
1429                 }
1430
1431                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1432                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1433                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1434                                 return;
1435                         }
1436
1437                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1438                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1439                                 return;
1440                         }
1441                 }
1442
1443                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1444                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1445         }
1446
1447         /**
1448          * Distribute the given item to users who subscribed to their tags
1449          *
1450          * @param array $item     Processed item
1451          */
1452         private static function distributeByTags(array $item)
1453         {
1454                 if (($item['uid'] != 0) || ($item['gravity'] != self::GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1455                         return;
1456                 }
1457
1458                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1459                 foreach ($uids as $uid) {
1460                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1461                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1462                 }
1463         }
1464
1465         /**
1466          * Distributes public items to the receivers
1467          *
1468          * @param integer $itemid      Item ID that should be added
1469          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1470          * @throws \Exception
1471          */
1472         public static function distribute(int $itemid, string $signed_text = '')
1473         {
1474                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1475                 $parent = Post::selectFirst(['owner-id'], $condition);
1476                 if (!DBA::isResult($parent)) {
1477                         Logger::warning('Item not found', ['condition' => $condition]);
1478                         return;
1479                 }
1480
1481                 // Only distribute public items from native networks
1482                 $condition = ['id' => $itemid, 'uid' => 0,
1483                         'network' => array_merge(Protocol::FEDERATED ,['']),
1484                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1485                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1486                 if (!DBA::isResult($item)) {
1487                         Logger::warning('Item not found', ['condition' => $condition]);
1488                         return;
1489                 }
1490
1491                 $origin = $item['origin'];
1492
1493                 $users = [];
1494
1495                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1496                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1497                 if (!DBA::isResult($owner)) {
1498                         return;
1499                 }
1500
1501                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1502                 $contacts = DBA::select('contact', ['uid'], $condition);
1503                 while ($contact = DBA::fetch($contacts)) {
1504                         if ($contact['uid'] == 0) {
1505                                 continue;
1506                         }
1507
1508                         $users[$contact['uid']] = $contact['uid'];
1509                 }
1510                 DBA::close($contacts);
1511
1512                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1513                 $contacts = DBA::select('contact', ['uid'], $condition);
1514                 while ($contact = DBA::fetch($contacts)) {
1515                         if ($contact['uid'] == 0) {
1516                                 continue;
1517                         }
1518
1519                         $users[$contact['uid']] = $contact['uid'];
1520                 }
1521                 DBA::close($contacts);
1522
1523                 if (!empty($owner['alias'])) {
1524                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1525                         $contacts = DBA::select('contact', ['uid'], $condition);
1526                         while ($contact = DBA::fetch($contacts)) {
1527                                 if ($contact['uid'] == 0) {
1528                                         continue;
1529                                 }
1530
1531                                 $users[$contact['uid']] = $contact['uid'];
1532                         }
1533                         DBA::close($contacts);
1534                 }
1535
1536                 $origin_uid = 0;
1537
1538                 if ($item['uri-id'] != $item['parent-uri-id']) {
1539                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1540                         while ($parent = Post::fetch($parents)) {
1541                                 $users[$parent['uid']] = $parent['uid'];
1542                                 if ($parent['origin'] && !$origin) {
1543                                         $origin_uid = $parent['uid'];
1544                                 }
1545                         }
1546                         DBA::close($parents);
1547                 }
1548
1549                 foreach ($users as $uid) {
1550                         if ($origin_uid == $uid) {
1551                                 $item['diaspora_signed_text'] = $signed_text;
1552                         }
1553                         $item['post-reason'] = self::PR_DISTRIBUTE;
1554                         self::storeForUser($item, $uid);
1555                 }
1556         }
1557
1558         /**
1559          * Store a public item defined by their URI-ID for the given users
1560          *
1561          * @param integer $uri_id     URI-ID of the given item
1562          * @param integer $uid        The user that will receive the item entry
1563          * @param array   $fields     Additional fields to be stored
1564          * @param integer $source_uid User id of the source post
1565          * @return integer stored item id
1566          */
1567         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1568         {
1569                 if ($uid == $source_uid) {
1570                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1571                         return 0;
1572                 }
1573
1574                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1575                 if (!DBA::isResult($item)) {
1576                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1577                         return 0;
1578                 }
1579
1580                 if (($uid != 0) && ($item['gravity'] == self::GRAVITY_PARENT)) {
1581                         $owner = User::getOwnerDataById($uid);
1582                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1583                                 Logger::info('Target user is a forum but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1584                                 return 0;
1585                         }
1586                 }
1587
1588                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1589                         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']]);
1590                         return 0;
1591                 }
1592
1593                 $item['post-reason'] = self::PR_STORED;
1594
1595                 $item = array_merge($item, $fields);
1596
1597                 if (($uid != 0) && Contact::isSharing(($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'], $uid)) {
1598                         $item['post-reason'] = self::PR_FOLLOWER;
1599                 }
1600
1601                 $is_reshare = ($item['gravity'] == self::GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1602
1603                 if (($uid != 0) && (($item['gravity'] == self::GRAVITY_PARENT) || $is_reshare) &&
1604                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1605                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC, self::PR_ACTIVITY])) {
1606                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid, 'uri-id' => $uri_id, 'post-reason' => $item['post-reason']]);
1607                         return 0;
1608                 }
1609
1610                 $causer = $item['causer-id'] ?: $item['author-id'];
1611
1612                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == self::GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1613                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1614                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1615                                 return 0;
1616                         }
1617                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1618                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1619                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1620                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1621                                 return 0;
1622                         }
1623                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1624                 }
1625
1626                 $stored = self::storeForUser($item, $uid);
1627                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1628                 return $stored;
1629         }
1630
1631         /**
1632          * Fetch the parent with the given uri-id
1633          *
1634          * @param integer $uri_id
1635          * @param integer $uid
1636          * @param integer $causer
1637          *
1638          * @return integer
1639          */
1640         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1641         {
1642                 // Fetch the origin user for the post
1643                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1644                 if (is_null($origin_uid)) {
1645                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1646                         return 0;
1647                 }
1648
1649                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1650         }
1651
1652         /**
1653          * Returns the origin uid of a post if the given user is allowed to see it.
1654          *
1655          * @param int $uriid
1656          * @param int $uid
1657          * @return int
1658          */
1659         private static function GetOriginUidForUriId(int $uriid, int $uid)
1660         {
1661                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1662                         return $uid;
1663                 }
1664
1665                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1666                 if (!empty($post)) {
1667                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1668                                 return $post['uid'];
1669                         }
1670
1671                         $pcid = Contact::getPublicIdByUserId($uid);
1672                         if (empty($pcid)) {
1673                                 return null;
1674                         }
1675
1676                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1677                                 if ($receiver == $pcid) {
1678                                         return $post['uid'];
1679                                 }
1680                         }
1681
1682                         return null;
1683                 }
1684
1685                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1686                         return 0;
1687                 }
1688
1689                 // When the post belongs to a a forum then all forum users are allowed to access it
1690                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1691                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1692                                 $target_uid = User::getIdForURL($tag['url']);
1693                                 if (!empty($target_uid)) {
1694                                         return $target_uid;
1695                                 }
1696                         }
1697                 }
1698
1699                 return null;
1700         }
1701
1702         /**
1703          * Store a public item array for the given users
1704          *
1705          * @param array   $item   The item entry that will be stored
1706          * @param integer $uid    The user that will receive the item entry
1707          * @return integer stored item id
1708          * @throws \Exception
1709          */
1710         private static function storeForUser(array $item, int $uid): int
1711         {
1712                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1713                 if (!empty($post['id'])) {
1714                         if (!empty($item['event-id'])) {
1715                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1716                                 if (!empty($event_post['event-id'])) {
1717                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1718                                         if (!empty($event)) {
1719                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1720                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1721                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1722                                         }
1723                                 }
1724                         }
1725                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1726                         return $post['id'];
1727                 }
1728
1729                 // Data from the "post-user" table
1730                 unset($item['id']);
1731                 unset($item['mention']);
1732                 unset($item['starred']);
1733                 unset($item['unseen']);
1734                 unset($item['psid']);
1735                 unset($item['pinned']);
1736                 unset($item['ignored']);
1737                 unset($item['pubmail']);
1738                 unset($item['event-id']);
1739                 unset($item['hidden']);
1740                 unset($item['notification-type']);
1741
1742                 // Data from the "post-delivery-data" table
1743                 unset($item['postopts']);
1744                 unset($item['inform']);
1745
1746                 $item['uid'] = $uid;
1747                 $item['origin'] = 0;
1748                 $item['wall'] = 0;
1749
1750                 $notify = false;
1751                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1752                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1753                         if (DBA::isResult($contact)) {
1754                                 $notify = self::isRemoteSelf($contact, $item);
1755                                 $item['wall'] = (bool)$notify;
1756                         }
1757                 }
1758
1759                 $item['contact-id'] = self::contactId($item);
1760                 $distributed = self::insert($item, $notify);
1761
1762                 if (!$distributed) {
1763                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1764                 } else {
1765                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1766                 }
1767                 return $distributed;
1768         }
1769
1770         /**
1771          * Add a shadow entry for a given item id that is a thread starter
1772          *
1773          * We store every public item entry additionally with the user id "0".
1774          * This is used for the community page and for the search.
1775          * It is planned that in the future we will store public item entries only once.
1776          *
1777          * @param integer $itemid Item ID that should be added
1778          * @throws \Exception
1779          */
1780         private static function addShadow(int $itemid)
1781         {
1782                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1783                 $condition = ['id' => $itemid, 'gravity' => self::GRAVITY_PARENT];
1784                 $item = Post::selectFirst($fields, $condition);
1785
1786                 if (!DBA::isResult($item)) {
1787                         return;
1788                 }
1789
1790                 // is it already a copy?
1791                 if (($itemid == 0) || ($item['uid'] == 0)) {
1792                         return;
1793                 }
1794
1795                 // Is it a visible public post?
1796                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1797                         return;
1798                 }
1799
1800                 // is it an entry from a connector? Only add an entry for natively connected networks
1801                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1802                         return;
1803                 }
1804
1805                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1806                         return;
1807                 }
1808
1809                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1810
1811                 if (DBA::isResult($item)) {
1812                         // Preparing public shadow (removing user specific data)
1813                         $item['uid'] = 0;
1814                         unset($item['id']);
1815                         unset($item['parent']);
1816                         unset($item['wall']);
1817                         unset($item['mention']);
1818                         unset($item['origin']);
1819                         unset($item['starred']);
1820                         unset($item['postopts']);
1821                         unset($item['inform']);
1822                         unset($item['post-reason']);
1823                         if ($item['uri-id'] == $item['parent-uri-id']) {
1824                                 $item['contact-id'] = $item['owner-id'];
1825                         } else {
1826                                 $item['contact-id'] = $item['author-id'];
1827                         }
1828
1829                         $public_shadow = self::insert($item);
1830
1831                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1832                 }
1833         }
1834
1835         /**
1836          * Add a shadow entry for a given item id that is a comment
1837          *
1838          * This function does the same like the function above - but for comments
1839          *
1840          * @param integer $itemid Item ID that should be added
1841          * @throws \Exception
1842          */
1843         private static function addShadowPost(int $itemid)
1844         {
1845                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1846                 if (!DBA::isResult($item)) {
1847                         return;
1848                 }
1849
1850                 // Is it a toplevel post?
1851                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1852                         self::addShadow($itemid);
1853                         return;
1854                 }
1855
1856                 // Is this a shadow entry?
1857                 if ($item['uid'] == 0) {
1858                         return;
1859                 }
1860
1861                 // Is there a shadow parent?
1862                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1863                         return;
1864                 }
1865
1866                 // Is there already a shadow entry?
1867                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1868                         return;
1869                 }
1870
1871                 // Save "origin" and "parent" state
1872                 $origin = $item['origin'];
1873                 $parent = $item['parent'];
1874
1875                 // Preparing public shadow (removing user specific data)
1876                 $item['uid'] = 0;
1877                 unset($item['id']);
1878                 unset($item['parent']);
1879                 unset($item['wall']);
1880                 unset($item['mention']);
1881                 unset($item['origin']);
1882                 unset($item['starred']);
1883                 unset($item['postopts']);
1884                 unset($item['inform']);
1885                 unset($item['post-reason']);
1886                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1887
1888                 $public_shadow = self::insert($item);
1889
1890                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1891
1892                 // If this was a comment to a Diaspora post we don't get our comment back.
1893                 // This means that we have to distribute the comment by ourselves.
1894                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1895                         self::distribute($public_shadow);
1896                 }
1897         }
1898
1899         /**
1900          * Adds a language specification in a "language" element of given $arr.
1901          * Expects "body" element to exist in $arr.
1902          *
1903          * @param array $item
1904          * @return string detected language
1905          * @throws \Text_LanguageDetect_Exception
1906          */
1907         private static function getLanguage(array $item): string
1908         {
1909                 if (!empty($item['language'])) {
1910                         return $item['language'];
1911                 }
1912
1913                 if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($item['body'])) {
1914                         return '';
1915                 }
1916
1917                 $languages = self::getLanguageArray(trim($item['title'] . "\n" . $item['body']), 3);
1918                 if (empty($languages)) {
1919                         return '';
1920                 }
1921
1922                 return json_encode($languages);
1923         }
1924
1925         /**
1926          * Get a language array from a given text
1927          *
1928          * @param string  $body
1929          * @param integer $count
1930          * @return array
1931          */
1932         public static function getLanguageArray(string $body, int $count): array
1933         {
1934                 // Convert attachments to links
1935                 $naked_body = BBCode::removeAttachment($body);
1936                 if (empty($naked_body)) {
1937                         return [];
1938                 }
1939
1940                 // Remove links and pictures
1941                 $naked_body = BBCode::removeLinks($naked_body);
1942
1943                 // Convert the title and the body to plain text
1944                 $naked_body = BBCode::toPlaintext($naked_body);
1945
1946                 // Remove possibly remaining links
1947                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1948
1949                 if (empty($naked_body)) {
1950                         return [];
1951                 }
1952
1953                 $naked_body = self::getDominantLanguage($naked_body);
1954
1955                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1956                 // See https://github.com/friendica/friendica/issues/10511
1957                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1958                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1959                 $availableLanguages['fa'] = 'fa';
1960
1961                 $ld = new Language(array_keys($availableLanguages));
1962                 return $ld->detect($naked_body)->limit(0, $count)->close() ?: [];
1963         }
1964
1965         /**
1966          * Check if latin or non latin are dominant in the body and only return the dominant one
1967          *
1968          * @param string $body
1969          * @return string
1970          */
1971         private static function getDominantLanguage(string $body): string
1972         {
1973                 $latin = '';
1974                 $non_latin = '';
1975                 for ($i = 0; $i < mb_strlen($body); $i++) {
1976                         $character = mb_substr($body, $i, 1);
1977                         $ord = mb_ord($character);
1978
1979                         // We add the most common characters to both strings.
1980                         if (($ord <= 64) || ($ord >= 91 && $ord <= 96) || ($ord >= 123 && $ord <= 191) || in_array($ord, [215, 247]) || ($ord >= 697 && $ord <= 735) || ($ord > 65535)) {
1981                                 $latin .= $character;
1982                                 $non_latin .= $character;
1983                         } elseif ($ord < 768) {
1984                                 $latin .= $character;
1985                         } else {
1986                                 $non_latin .= $character;
1987                         }
1988                 }
1989                 return (mb_strlen($latin) > mb_strlen($non_latin)) ? $latin : $non_latin;
1990         }
1991
1992         public static function getLanguageMessage(array $item): string
1993         {
1994                 $iso639 = new \Matriphe\ISO639\ISO639;
1995
1996                 $used_languages = '';
1997                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1998                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1999                 }
2000                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2001                 return $used_languages;
2002         }
2003
2004         /**
2005          * Creates an unique guid out of a given uri.
2006          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
2007          * Posts that are created on this system are using System::createUUID.
2008          * Received ActivityPub posts are using Processor::getGUIDByURL.
2009          *
2010          * @param string      $uri  uri of an item entry
2011          * @param string|null $host hostname for the GUID prefix
2012          * @return string Unique guid
2013          * @throws \Exception
2014          */
2015         public static function guidFromUri(string $uri, string $host = null): string
2016         {
2017                 // Our regular guid routine is using this kind of prefix as well
2018                 // We have to avoid that different routines could accidentally create the same value
2019                 $parsed = parse_url($uri);
2020
2021                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2022                 unset($parsed['scheme']);
2023
2024                 $hostPart = $host ?? $parsed['host'] ?? '';
2025                 if (!$hostPart) {
2026                         Logger::warning('Empty host GUID part', ['uri' => $uri, 'host' => $host, 'parsed' => $parsed, 'callstack' => System::callstack(10)]);
2027                 }
2028
2029                 // Glue it together to be able to make a hash from it
2030                 $host_id = implode('/', $parsed);
2031
2032                 // Use a mixture of several hashes to provide some GUID like experience
2033                 return hash('crc32', $hostPart) . '-' . hash('joaat', $host_id) . '-' . hash('fnv164', $host_id);
2034         }
2035
2036         /**
2037          * generate an unique URI
2038          *
2039          * @param string $guid An existing GUID (Otherwise it will be generated)
2040          *
2041          * @return string
2042          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2043          */
2044         public static function newURI(string $guid = ''): string
2045         {
2046                 if ($guid == '') {
2047                         $guid = System::createUUID();
2048                 }
2049
2050                 return DI::baseUrl()->get() . '/objects/' . $guid;
2051         }
2052
2053         /**
2054          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2055          *
2056          * This can be used to filter for inactive contacts.
2057          * Only do this for public postings to avoid privacy problems, since poco data is public.
2058          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2059          *
2060          * @param array $arr Contains the just posted item record
2061          * @throws \Exception
2062          */
2063         private static function updateContact(array $arr)
2064         {
2065                 // Unarchive the author
2066                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2067                 if (DBA::isResult($contact)) {
2068                         Contact::unmarkForArchival($contact);
2069                 }
2070
2071                 // Unarchive the contact if it's not our own contact
2072                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2073                 if (DBA::isResult($contact)) {
2074                         Contact::unmarkForArchival($contact);
2075                 }
2076
2077                 /// @todo On private posts we could obfuscate the date
2078                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2079
2080                 // Is it a forum? Then we don't care about the rules from above
2081                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
2082                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2083                                 $update = true;
2084                         }
2085                 }
2086
2087                 if ($update) {
2088                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2089                         // So we have to ensure to only update the last item when it had been our own post,
2090                         // or it had been done by a "regular" contact.
2091                         if (!empty($arr['wall'])) {
2092                                 $condition = ['id' => $arr['contact-id']];
2093                         } else {
2094                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2095                         }
2096                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2097                 }
2098                 // Now do the same for the system wide contacts with uid=0
2099                 if ($arr['private'] != self::PRIVATE) {
2100                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2101                                 ['id' => $arr['owner-id']]);
2102
2103                         if ($arr['owner-id'] != $arr['author-id']) {
2104                                 Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2105                                         ['id' => $arr['author-id']]);
2106                         }
2107                 }
2108         }
2109
2110         public static function setHashtags(string $body): string
2111         {
2112                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2113                         $tags = BBCode::getTags($body);
2114
2115                         // No hashtags?
2116                         if (!count($tags)) {
2117                                 return $body;
2118                         }
2119
2120                         // This sorting is important when there are hashtags that are part of other hashtags
2121                         // Otherwise there could be problems with hashtags like #test and #test2
2122                         // Because of this we are sorting from the longest to the shortest tag.
2123                         usort($tags, function ($a, $b) {
2124                                 return strlen($b) <=> strlen($a);
2125                         });
2126
2127                         $URLSearchString = "^\[\]";
2128
2129                         // All hashtags should point to the home server if "local_tags" is activated
2130                         if (DI::config()->get('system', 'local_tags')) {
2131                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2132                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2133                         }
2134
2135                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2136                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2137                                 function ($match) {
2138                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2139                                 }, $body);
2140
2141                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2142                                 function ($match) {
2143                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2144                                 }, $body);
2145
2146                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2147                                 function ($match) {
2148                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2149                                 }, $body);
2150
2151                         // Repair recursive urls
2152                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2153                                 "&num;$2", $body);
2154
2155                         foreach ($tags as $tag) {
2156                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2157                                         continue;
2158                                 }
2159
2160                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2161                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2162
2163                                 $body = str_replace($tag, $newtag, $body);
2164                         }
2165
2166                         // Convert back the masked hashtags
2167                         $body = str_replace("&num;", "#", $body);
2168
2169                         return $body;
2170                 });
2171
2172                 return $body;
2173         }
2174
2175         /**
2176          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2177          *
2178          * @param int $uid
2179          * @param int $item_id
2180          * @return boolean true if item was deleted, else false
2181          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2182          * @throws \ImagickException
2183          */
2184         private static function tagDeliver(int $uid, int $item_id): bool
2185         {
2186                 $mention = false;
2187
2188                 $owner = User::getOwnerDataById($uid);
2189                 if (!DBA::isResult($owner)) {
2190                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2191                         return false;
2192                 }
2193
2194                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2195                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2196                         return false;
2197                 }
2198
2199                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [self::GRAVITY_PARENT, self::GRAVITY_COMMENT], 'origin' => false]);
2200                 if (!DBA::isResult($item)) {
2201                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2202                         return false;
2203                 }
2204
2205                 if ($item['gravity'] == self::GRAVITY_PARENT) {
2206                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2207                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2208                         } else {
2209                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2210                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2211                                 return true;
2212                         }
2213
2214                         $arr = ['item' => $item, 'user' => $owner];
2215
2216                         Hook::callAll('tagged', $arr);
2217                 } else {
2218                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2219                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2220                         } else {
2221                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2222                                 return false;
2223                         }
2224                 }
2225
2226                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2227
2228                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2229                         $allow_cid = '';
2230                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2231                         $deny_cid  = '';
2232                         $deny_gid  = '';
2233                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2234                 } else {
2235                         self::performActivity($item['id'], 'announce', $uid);
2236                 }
2237
2238                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2239                 return false;
2240         }
2241
2242         /**
2243          * Automatically reshare the item if the "remote_self" option is selected
2244          *
2245          * @param array $item
2246          * @return void
2247          */
2248         private static function autoReshare(array $item)
2249         {
2250                 if ($item['gravity'] != self::GRAVITY_PARENT) {
2251                         return;
2252                 }
2253
2254                 $cdata = Contact::getPublicAndUserContactID($item['author-id'], $item['uid']);
2255                 if (empty($cdata['user']) || ($cdata['user'] != $item['contact-id'])) {
2256                         return;
2257                 }
2258
2259                 $cdata = Contact::getPublicAndUserContactID($item['author-id'], $item['uid']);
2260                 if (empty($cdata['user']) || ($cdata['user'] != $item['contact-id'])) {
2261                         return;
2262                 }
2263
2264                 if (!DBA::exists('contact', ['id' => $cdata['user'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2265                         return;
2266                 }
2267
2268                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2269                         return;
2270                 }
2271
2272                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2273
2274                 self::performActivity($item['id'], 'announce', $item['uid']);
2275         }
2276
2277         public static function isRemoteSelf(array $contact, array &$datarray): bool
2278         {
2279                 if ($contact['remote_self'] != Contact::MIRROR_OWN_POST) {
2280                         return false;
2281                 }
2282
2283                 // Prevent the forwarding of posts that are forwarded
2284                 if (!empty($datarray['extid']) && ($datarray['extid'] == Protocol::DFRN)) {
2285                         Logger::info('Already forwarded');
2286                         return false;
2287                 }
2288
2289                 // Prevent to forward already forwarded posts
2290                 if ($datarray['app'] == DI::baseUrl()->getHostname()) {
2291                         Logger::info('Already forwarded (second test)');
2292                         return false;
2293                 }
2294
2295                 // Only forward posts
2296                 if ($datarray['verb'] != Activity::POST) {
2297                         Logger::info('No post');
2298                         return false;
2299                 }
2300
2301                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2302                         Logger::info('Not public');
2303                         return false;
2304                 }
2305
2306                 $datarray2 = $datarray;
2307                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2308
2309                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2310                                         ['uid' => $contact['uid'], 'self' => true]);
2311                 if (!DBA::isResult($self)) {
2312                         Logger::error('Self contact not found', ['uid' => $contact['uid']]);
2313                         return false;
2314                 }
2315
2316                 $datarray['contact-id'] = $self['id'];
2317
2318                 $datarray['author-name']   = $datarray['owner-name']   = $self['name'];
2319                 $datarray['author-link']   = $datarray['owner-link']   = $self['url'];
2320                 $datarray['author-avatar'] = $datarray['owner-avatar'] = $self['thumb'];
2321
2322                 unset($datarray['edited']);
2323
2324                 unset($datarray['network']);
2325                 unset($datarray['owner-id']);
2326                 unset($datarray['author-id']);
2327
2328                 if ($contact['network'] != Protocol::FEED) {
2329                         $old_uri_id = $datarray['uri-id'] ?? 0;
2330                         $datarray['guid'] = System::createUUID();
2331                         unset($datarray['plink']);
2332                         $datarray['uri'] = self::newURI($datarray['guid']);
2333                         $datarray['uri-id'] = ItemURI::getIdByURI($datarray['uri']);
2334                         $datarray['extid'] = Protocol::DFRN;
2335                         $urlpart = parse_url($datarray2['author-link']);
2336                         $datarray['app'] = $urlpart['host'];
2337                         if (!empty($old_uri_id)) {
2338                                 Post\Media::copy($old_uri_id, $datarray['uri-id']);
2339                         }
2340
2341                         unset($datarray['parent-uri']);
2342                         unset($datarray['thr-parent']);
2343
2344                         // Store the original post
2345                         $result = self::insert($datarray2);
2346                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2347                 } else {
2348                         $datarray['private'] = self::PUBLIC;
2349                         $datarray['app'] = 'Feed';
2350                         $result = true;
2351                 }
2352
2353                 return (bool)$result;
2354         }
2355
2356         /**
2357          *
2358          * @param string $s
2359          * @param int    $uid
2360          * @param array  $item
2361          * @param int    $cid
2362          * @return string
2363          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2364          * @throws \ImagickException
2365          */
2366         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2367         {
2368                 if (DI::config()->get('system', 'disable_embedded')) {
2369                         return $s;
2370                 }
2371
2372                 Logger::info('check for photos');
2373                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2374
2375                 $orig_body = $s;
2376                 $new_body = '';
2377
2378                 $img_start = strpos($orig_body, '[img');
2379                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2380                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2381
2382                 while (($img_st_close !== false) && ($img_len !== false)) {
2383                         $img_st_close++; // make it point to AFTER the closing bracket
2384                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2385
2386                         Logger::info('found photo', ['image' => $image]);
2387
2388                         if (stristr($image, $site . '/photo/')) {
2389                                 // Only embed locally hosted photos
2390                                 $replace = false;
2391                                 $i = basename($image);
2392                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2393                                 $x = strpos($i, '-');
2394
2395                                 if ($x) {
2396                                         $res = substr($i, $x + 1);
2397                                         $i = substr($i, 0, $x);
2398                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2399                                         if (DBA::isResult($photo)) {
2400                                                 /*
2401                                                  * Check to see if we should replace this photo link with an embedded image
2402                                                  * 1. No need to do so if the photo is public
2403                                                  * 2. If there's a contact-id provided, see if they're in the access list
2404                                                  *    for the photo. If so, embed it.
2405                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2406                                                  *    permissions, regardless of order but first check to see if they're an exact
2407                                                  *    match to save some processing overhead.
2408                                                  */
2409                                                 if (self::hasPermissions($photo)) {
2410                                                         if ($cid) {
2411                                                                 $recips = self::enumeratePermissions($photo);
2412                                                                 if (in_array($cid, $recips)) {
2413                                                                         $replace = true;
2414                                                                 }
2415                                                         } elseif ($item) {
2416                                                                 if (self::samePermissions($uid, $item, $photo)) {
2417                                                                         $replace = true;
2418                                                                 }
2419                                                         }
2420                                                 }
2421                                                 if ($replace) {
2422                                                         $photo_img = Photo::getImageForPhoto($photo);
2423                                                         // If a custom width and height were specified, apply before embedding
2424                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2425                                                                 Logger::info('scaling photo');
2426
2427                                                                 $width = intval($match[1]);
2428                                                                 $height = intval($match[2]);
2429
2430                                                                 $photo_img->scaleDown(max($width, $height));
2431                                                         }
2432
2433                                                         $data = $photo_img->asString();
2434                                                         $type = $photo_img->getType();
2435
2436                                                         Logger::info('replacing photo');
2437                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2438                                                         Logger::debug('replaced', ['image' => $image]);
2439                                                 }
2440                                         }
2441                                 }
2442                         }
2443
2444                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2445                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2446                         if ($orig_body === false) {
2447                                 $orig_body = '';
2448                         }
2449
2450                         $img_start = strpos($orig_body, '[img');
2451                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2452                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2453                 }
2454
2455                 $new_body = $new_body . $orig_body;
2456
2457                 return $new_body;
2458         }
2459
2460         private static function hasPermissions(array $obj)
2461         {
2462                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2463                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2464         }
2465
2466         // @TODO $uid is unused parameter
2467         private static function samePermissions($uid, array $obj1, array $obj2): bool
2468         {
2469                 // first part is easy. Check that these are exactly the same.
2470                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2471                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2472                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2473                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2474                         return true;
2475                 }
2476
2477                 // This is harder. Parse all the permissions and compare the resulting set.
2478                 $recipients1 = self::enumeratePermissions($obj1);
2479                 $recipients2 = self::enumeratePermissions($obj2);
2480                 sort($recipients1);
2481                 sort($recipients2);
2482
2483                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2484                 return ($recipients1 == $recipients2);
2485         }
2486
2487         /**
2488          * Returns an array of contact-ids that are allowed to see this object
2489          *
2490          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2491          * @param bool  $check_dead Prunes unavailable contacts from the result
2492          * @return array
2493          * @throws \Exception
2494          */
2495         public static function enumeratePermissions(array $obj, bool $check_dead = false): array
2496         {
2497                 $aclFormater = DI::aclFormatter();
2498
2499                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2500                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2501                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2502                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2503                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2504                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2505                 $recipients   = array_diff($recipients, $deny);
2506                 return $recipients;
2507         }
2508
2509         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2510         {
2511                 if (!$uid || ($days < 1)) {
2512                         return;
2513                 }
2514
2515                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2516                         $uid, self::GRAVITY_PARENT];
2517
2518                 /*
2519                  * $expire_network_only = save your own wall posts
2520                  * and just expire conversations started by others
2521                  */
2522                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2523
2524                 if ($expire_network_only) {
2525                         $condition[0] .= " AND NOT `wall`";
2526                 }
2527
2528                 if ($network != "") {
2529                         $condition[0] .= " AND `network` = ?";
2530                         $condition[] = $network;
2531                 }
2532
2533                 $condition[0] .= " AND `received` < ?";
2534                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2535
2536                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2537
2538                 if (!DBA::isResult($items)) {
2539                         return;
2540                 }
2541
2542                 $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
2543
2544                 // Forcing expiring of items - but not notes and marked items
2545                 if ($force) {
2546                         $expire_items = true;
2547                 }
2548
2549                 $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
2550                 $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
2551                 $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
2552
2553                 $expired = 0;
2554
2555                 $priority = DI::config()->get('system', 'expire-notify-priority');
2556
2557                 while ($item = Post::fetch($items)) {
2558                         // don't expire filed items
2559                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2560                                 continue;
2561                         }
2562
2563                         // Only expire posts, not photos and photo comments
2564
2565                         if (!$expire_photos && !empty($item['resource-id'])) {
2566                                 continue;
2567                         } elseif (!$expire_starred && intval($item['starred'])) {
2568                                 continue;
2569                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2570                                 continue;
2571                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2572                                 continue;
2573                         }
2574
2575                         self::markForDeletionById($item['id'], $priority);
2576
2577                         ++$expired;
2578                 }
2579                 DBA::close($items);
2580                 Logger::notice('Expired', ['user' => $uid, 'days' => $days, 'network' => $network, 'force' => $force, 'expired' => $expired, 'expire items' => $expire_items, 'expire notes' => $expire_notes, 'expire starred' => $expire_starred, 'expire photos' => $expire_photos, 'condition' => $condition]);
2581         }
2582
2583         public static function firstPostDate(int $uid, bool $wall = false)
2584         {
2585                 $user = User::getById($uid, ['register_date']);
2586                 if (empty($user)) {
2587                         return false;
2588                 }
2589
2590                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2591                         $uid, $wall, $user['register_date']];
2592                 $params = ['order' => ['received' => false]];
2593                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2594                 if (DBA::isResult($thread)) {
2595                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2596                         return $postdate;
2597                 }
2598                 return false;
2599         }
2600
2601         /**
2602          * add/remove activity to an item
2603          *
2604          * Toggle activities as like,dislike,attend of an item
2605          *
2606          * @param int    $item_id
2607          * @param string $verb
2608          *            Activity verb. One of
2609          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2610          *            attendno, unattendno, attendmaybe, unattendmaybe,
2611          *            announce, unannouce
2612          * @param int    $uid
2613          * @param string $allow_cid
2614          * @param string $allow_gid
2615          * @param string $deny_cid
2616          * @param string $deny_gid
2617          * @return bool
2618          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2619          * @throws \ImagickException
2620          * @hook  'post_local_end'
2621          *            array $arr
2622          *            'post_id' => ID of posted item
2623          */
2624         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2625         {
2626                 if (empty($uid)) {
2627                         return false;
2628                 }
2629
2630                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2631
2632                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2633                 if (!DBA::isResult($item)) {
2634                         Logger::warning('Post had not been fetched', ['id' => $item_id]);
2635                         return false;
2636                 }
2637
2638                 $uri_id = $item['uri-id'];
2639
2640                 if (!in_array($item['uid'], [0, $uid])) {
2641                         return false;
2642                 }
2643
2644                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2645                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2646                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2647                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2648                                 if (!DBA::isResult($item)) {
2649                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2650                                         return false;
2651                                 }
2652                         }
2653                 }
2654
2655                 // Retrieves the local post owner
2656                 $owner = User::getOwnerDataById($uid);
2657                 if (empty($owner)) {
2658                         Logger::info('Empty owner for user', ['uid' => $uid]);
2659                         return false;
2660                 }
2661
2662                 // Retrieve the current logged in user's public contact
2663                 $author_id = Contact::getPublicIdByUserId($uid);
2664                 if (empty($author_id)) {
2665                         Logger::info('Empty public contact');
2666                         return false;
2667                 }
2668
2669                 $activity = null;
2670                 switch ($verb) {
2671                         case 'like':
2672                         case 'unlike':
2673                                 $activity = Activity::LIKE;
2674                                 break;
2675                         case 'dislike':
2676                         case 'undislike':
2677                                 $activity = Activity::DISLIKE;
2678                                 break;
2679                         case 'attendyes':
2680                         case 'unattendyes':
2681                                 $activity = Activity::ATTEND;
2682                                 break;
2683                         case 'attendno':
2684                         case 'unattendno':
2685                                 $activity = Activity::ATTENDNO;
2686                                 break;
2687                         case 'attendmaybe':
2688                         case 'unattendmaybe':
2689                                 $activity = Activity::ATTENDMAYBE;
2690                                 break;
2691                         case 'follow':
2692                         case 'unfollow':
2693                                 $activity = Activity::FOLLOW;
2694                                 break;
2695                         case 'announce':
2696                         case 'unannounce':
2697                                 $activity = Activity::ANNOUNCE;
2698                                 break;
2699                         default:
2700                                 Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2701                                 return false;
2702                 }
2703
2704                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2705
2706                 // Enable activity toggling instead of on/off
2707                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2708
2709                 // Look for an existing verb row
2710                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2711                 if ($event_verb_flag) {
2712                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2713
2714                         // Translate to the index based activity index
2715                         $vids = [];
2716                         foreach ($verbs as $verb) {
2717                                 $vids[] = Verb::getID($verb);
2718                         }
2719                 } else {
2720                         $vids = Verb::getID($activity);
2721                 }
2722
2723                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => self::GRAVITY_ACTIVITY,
2724                         'author-id' => $author_id, 'uid' => $uid, 'thr-parent-id' => $uri_id];
2725                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2726
2727                 if (DBA::isResult($like_item)) {
2728                         /**
2729                          * Truth table for existing activities
2730                          *
2731                          * |          Inputs            ||      Outputs      |
2732                          * |----------------------------||-------------------|
2733                          * |  Mode  | Event | Same verb || Delete? | Return? |
2734                          * |--------|-------|-----------||---------|---------|
2735                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2736                          * | create |  Yes  |    No     ||   Yes   |   No    |
2737                          * | create |  No   |    Yes    ||   No    |   Yes   |
2738                          * | create |  No   |    No     ||        N/A†       |
2739                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2740                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2741                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2742                          * | delete |  No   |    No     ||        N/A†       |
2743                          * |--------|-------|-----------||---------|---------|
2744                          * |   A    |   B   |     C     || A xor C | !B or C |
2745                          *
2746                          * † Can't happen: It's impossible to find an existing non-event activity without
2747                          *                 the same verb because we are only looking for this single verb.
2748                          *
2749                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2750                          */
2751                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2752                                 self::markForDeletionById($like_item['id']);
2753                         }
2754
2755                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2756                                 return true;
2757                         }
2758                 }
2759
2760                 // No need to go further if we aren't creating anything
2761                 if ($mode == 'delete') {
2762                         return true;
2763                 }
2764
2765                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2766
2767                 $new_item = [
2768                         'guid'          => System::createUUID(),
2769                         'uri'           => self::newURI(),
2770                         'uid'           => $uid,
2771                         'contact-id'    => $owner['id'],
2772                         'wall'          => $item['wall'],
2773                         'origin'        => 1,
2774                         'network'       => Protocol::DFRN,
2775                         'protocol'      => Conversation::PARCEL_DIRECT,
2776                         'direction'     => Conversation::PUSH,
2777                         'gravity'       => self::GRAVITY_ACTIVITY,
2778                         'parent'        => $item['id'],
2779                         'thr-parent'    => $item['uri'],
2780                         'owner-id'      => $author_id,
2781                         'author-id'     => $author_id,
2782                         'body'          => $activity,
2783                         'verb'          => $activity,
2784                         'object-type'   => $objtype,
2785                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2786                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2787                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2788                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2789                         'visible'       => 1,
2790                         'unseen'        => 1,
2791                 ];
2792
2793                 if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
2794                         $signed = Diaspora::createLikeSignature($uid, $new_item);
2795                         if (!empty($signed)) {
2796                                 $new_item['diaspora_signed_text'] = json_encode($signed);
2797                         }
2798                 }
2799
2800                 self::insert($new_item, true);
2801
2802                 // If the parent item isn't visible then set it to visible
2803                 // @todo Check if this is still needed
2804                 if (!$item['visible']) {
2805                         self::update(['visible' => true], ['id' => $item['id']]);
2806                 }
2807                 return true;
2808         }
2809
2810         /**
2811          * Fetch the SQL condition for the given user id
2812          *
2813          * @param integer $owner_id User ID for which the permissions should be fetched
2814          * @return array condition
2815          */
2816         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
2817         {
2818                 $local_user = DI::userSession()->getLocalUserId();
2819                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
2820
2821                 // default permissions - anonymous user
2822                 $condition = ["`private` != ?", self::PRIVATE];
2823
2824                 if ($local_user && ($local_user == $owner_id)) {
2825                         // Profile owner - everything is visible
2826                         $condition = [];
2827                 } elseif ($remote_user) {
2828                          // Authenticated visitor - fetch the matching permissionsets
2829                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2830                         if (!empty($set)) {
2831                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2832                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2833                                         self::PRIVATE, self::PRIVATE];
2834                                 $condition = array_merge($condition, $permissionSets->column('id'));
2835                         }
2836                 }
2837
2838                 return $condition;
2839         }
2840
2841         /**
2842          * Get a permission SQL string for the given user
2843          *
2844          * @param int $owner_id
2845          * @param string $table
2846          * @return string
2847          */
2848         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
2849         {
2850                 $local_user = DI::userSession()->getLocalUserId();
2851                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
2852
2853                 if (!empty($table)) {
2854                         $table = DBA::quoteIdentifier($table) . '.';
2855                 }
2856
2857                 /*
2858                  * Construct permissions
2859                  *
2860                  * default permissions - anonymous user
2861                  */
2862                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2863
2864                 // Profile owner - everything is visible
2865                 if ($local_user && ($local_user == $owner_id)) {
2866                         $sql = '';
2867                 } elseif ($remote_user) {
2868                         /*
2869                          * Authenticated visitor. Unless pre-verified,
2870                          * check that the contact belongs to this $owner_id
2871                          * and load the groups the visitor belongs to.
2872                          * If pre-verified, the caller is expected to have already
2873                          * done this and passed the groups into this function.
2874                          */
2875                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2876
2877                         if (!empty($set)) {
2878                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2879                         } else {
2880                                 $sql_set = '';
2881                         }
2882
2883                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2884                 }
2885
2886                 return $sql;
2887         }
2888
2889         /**
2890          * get translated item type
2891          *
2892          * @param array                $item
2893          * @param \Friendica\Core\L10n $l10n
2894          * @return string
2895          */
2896         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
2897         {
2898                 if (!empty($item['event-id'])) {
2899                         return $l10n->t('event');
2900                 } elseif (!empty($item['resource-id'])) {
2901                         return $l10n->t('photo');
2902                 } elseif ($item['gravity'] == self::GRAVITY_ACTIVITY) {
2903                         return $l10n->t('activity');
2904                 } elseif ($item['gravity'] == self::GRAVITY_COMMENT) {
2905                         return $l10n->t('comment');
2906                 }
2907
2908                 return $l10n->t('post');
2909         }
2910
2911         /**
2912          * Sets the "rendered-html" field of the provided item
2913          *
2914          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2915          *
2916          * @param array $item
2917          *
2918          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2919          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2920          */
2921         private static function putInCache(&$item)
2922         {
2923                 // Save original body to prevent addons to modify it
2924                 $body = $item['body'];
2925
2926                 $rendered_hash = $item['rendered-hash'] ?? '';
2927                 $rendered_html = $item['rendered-html'] ?? '';
2928
2929                 if ($rendered_hash == ''
2930                         || $rendered_html == ''
2931                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2932                         || DI::config()->get('system', 'ignore_cache')
2933                 ) {
2934                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2935                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2936
2937                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2938                         Hook::callAll('put_item_in_cache', $hook_data);
2939                         $item['rendered-html'] = $hook_data['rendered-html'];
2940                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2941                         unset($hook_data);
2942
2943                         // Update if the generated values differ from the existing ones
2944                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2945                                 self::update(
2946                                         [
2947                                                 'rendered-html' => $item['rendered-html'],
2948                                                 'rendered-hash' => $item['rendered-hash']
2949                                         ],
2950                                         ['id' => $item['id']]
2951                                 );
2952                         }
2953                 }
2954
2955                 $item['body'] = $body;
2956         }
2957
2958         /**
2959          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2960          * If attach is true, also add icons for item attachments.
2961          *
2962          * @param array   $item Record from item table
2963          * @param boolean $attach If true, add icons for item attachments as well
2964          * @param boolean $is_preview Whether this is a preview
2965          * @param boolean $only_cache Whether only cached HTML should be updated
2966          * @return string item body html
2967          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2968          * @throws \ImagickException
2969          * @hook  prepare_body_init item array before any work
2970          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2971          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2972          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2973          */
2974         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
2975         {
2976                 $a = DI::app();
2977                 Hook::callAll('prepare_body_init', $item);
2978
2979
2980                 // In order to provide theme developers more possibilities, event items
2981                 // are treated differently.
2982                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2983                         $ev = Event::getItemHTML($item);
2984                         return $ev;
2985                 }
2986
2987                 $tags = Tag::populateFromItem($item);
2988
2989                 $item['tags'] = $tags['tags'];
2990                 $item['hashtags'] = $tags['hashtags'];
2991                 $item['mentions'] = $tags['mentions'];
2992
2993                 if (!$is_preview) {
2994                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
2995                         $item['body'] = Post\Media::removeFromEndOfBody($item['body'] ?? '');
2996                 }
2997
2998                 $body = $item['body'];
2999                 if ($is_preview) {
3000                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3001                 }
3002
3003                 $fields = ['uri-id', 'uri', 'body', 'title', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink', 'network', 'has-media', 'quote-uri-id', 'post-type'];
3004
3005                 $shared_uri_id = 0;
3006                 $shared_links  = [];
3007
3008                 $shared = DI::contentItem()->getSharedPost($item, $fields);
3009                 if (!empty($shared['post'])) {
3010                         $shared_item  = $shared['post'];
3011                         $shared_item['body'] = Post\Media::removeFromEndOfBody($shared_item['body']);
3012                         $quote_uri_id = $shared['post']['uri-id'];
3013                         $shared_links[] = strtolower($shared['post']['uri']);
3014                         $item['body'] = BBCode::removeSharedData($item['body']);
3015                 } elseif (empty($shared_item['uri-id']) && empty($item['quote-uri-id']) && ($item['network'] != Protocol::DIASPORA)) {
3016                         $media = Post\Media::getByURIId($item['uri-id'], [Post\Media::ACTIVITY]);
3017                         if (!empty($media)) {
3018                                 $shared_item = Post::selectFirst($fields, ['plink' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3019
3020                                 if (empty($shared_item['uri-id'])) {
3021                                         $shared_item = Post::selectFirst($fields, ['uri' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3022                                         $shared_links[] = strtolower($media[0]['url']);
3023                                 }
3024
3025                                 $quote_uri_id = $shared_item['uri-id'] ?? 0;
3026                         }
3027                 }
3028
3029                 if (!empty($quote_uri_id)) {
3030                         $item['body'] .= "\n" . DI::contentItem()->createSharedBlockByArray($shared_item);
3031                 }
3032
3033                 if (!empty($shared_item['uri-id'])) {
3034                         $shared_uri_id = $shared_item['uri-id'];
3035                         $shared_links[] = strtolower($shared_item['plink']);
3036                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, [], $shared_item['has-media']);
3037                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
3038                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
3039                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
3040                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
3041                 }
3042
3043                 $attachments = Post\Media::splitAttachments($item['uri-id'], $shared_links, $item['has-media'] ?? false);
3044                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
3045
3046                 self::putInCache($item);
3047                 $item['body'] = $body;
3048                 $s = $item["rendered-html"];
3049
3050                 if ($only_cache) {
3051                         return '';
3052                 }
3053
3054                 // Compile eventual content filter reasons
3055                 $filter_reasons = [];
3056                 if (!$is_preview && DI::userSession()->getPublicContactId() != $item['author-id']) {
3057                         if (!empty($item['user-blocked-author']) || !empty($item['user-blocked-owner'])) {
3058                                 $filter_reasons[] = DI::l10n()->t('%s is blocked', $item['author-name']);
3059                         } elseif (!empty($item['user-ignored-author']) || !empty($item['user-ignored-owner'])) {
3060                                 $filter_reasons[] = DI::l10n()->t('%s is ignored', $item['author-name']);
3061                         } elseif (!empty($item['user-collapsed-author']) || !empty($item['user-collapsed-owner'])) {
3062                                 $filter_reasons[] = DI::l10n()->t('Content from %s is collapsed', $item['author-name']);
3063                         }
3064
3065                         if (!empty($item['content-warning']) && (!DI::userSession()->getLocalUserId() || !DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'disable_cw', false))) {
3066                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3067                         }
3068
3069                         $item['attachments'] = $attachments;
3070
3071                         $hook_data = [
3072                                 'item' => $item,
3073                                 'filter_reasons' => $filter_reasons
3074                         ];
3075                         Hook::callAll('prepare_body_content_filter', $hook_data);
3076                         $filter_reasons = $hook_data['filter_reasons'];
3077                         unset($hook_data);
3078                 }
3079
3080                 $hook_data = [
3081                         'item' => $item,
3082                         'html' => $s,
3083                         'preview' => $is_preview,
3084                         'filter_reasons' => $filter_reasons
3085                 ];
3086                 Hook::callAll('prepare_body', $hook_data);
3087                 $s = $hook_data['html'];
3088
3089                 unset($hook_data);
3090
3091                 if (!$attach) {
3092                         // Replace the blockquotes with quotes that are used in mails.
3093                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3094                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3095                         return $s;
3096                 }
3097
3098                 if (!empty($shared_attachments)) {
3099                         $s = self::addVisualAttachments($shared_attachments, $shared_item, $s, true);
3100                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
3101                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
3102                         $body = BBCode::removeSharedData($body);
3103                 }
3104
3105                 $s = self::addVisualAttachments($attachments, $item, $s, false);
3106                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
3107                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
3108                 $s = self::addQuestions($item, $s);
3109
3110                 // Map.
3111                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3112                         $x = Map::byCoordinates(trim($item['coord']));
3113                         if ($x) {
3114                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3115                         }
3116                 }
3117
3118                 // Replace friendica image url size with theme preference.
3119                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
3120                         $ps = $a->getThemeInfoValue('item_image_size');
3121                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3122                 }
3123
3124                 $s = HTML::applyContentFilter($s, $filter_reasons);
3125
3126                 $hook_data = ['item' => $item, 'html' => $s];
3127                 Hook::callAll('prepare_body_final', $hook_data);
3128                 return $hook_data['html'];
3129         }
3130
3131         /**
3132          * @param array $images
3133          * @return string
3134          * @throws \Friendica\Network\HTTPException\ServiceUnavailableException
3135          */
3136         private static function makeImageGrid(array $images): string
3137         {
3138                 // Image for first column (fc) and second column (sc)
3139                 $images_fc = [];
3140                 $images_sc = [];
3141
3142                 for ($i = 0; $i < count($images); $i++) {
3143                         ($i % 2 == 0) ? ($images_fc[] = $images[$i]) : ($images_sc[] = $images[$i]);
3144                 }
3145
3146                 return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
3147                         'columns' => [
3148                                 'fc' => $images_fc,
3149                                 'sc' => $images_sc,
3150                         ],
3151                 ]);
3152         }
3153
3154
3155         /**
3156          * Check if the body contains a link
3157          *
3158          * @param string $body
3159          * @param string $url
3160          * @param int    $type
3161          * @return bool
3162          */
3163         public static function containsLink(string $body, string $url, int $type = 0): bool
3164         {
3165                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
3166                 $urlparts = parse_url($url);
3167                 if (empty($urlparts)) {
3168                         return false;
3169                 }
3170
3171                 unset($urlparts['query']);
3172                 unset($urlparts['fragment']);
3173
3174                 try {
3175                         $url = (string)Uri::fromParts($urlparts);
3176                 } catch (\InvalidArgumentException $e) {
3177                         DI::logger()->notice('Invalid URL', ['$url' => $url, '$urlparts' => $urlparts]);
3178                         /* See https://github.com/friendica/friendica/issues/12113
3179                          * Malformed URLs will result in a Fatal Error
3180                          */
3181                         return false;
3182                 }
3183
3184                 // Remove media links to only search in embedded content
3185                 // @todo Check images for image link, audio for audio links, ...
3186                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3187                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3188                 }
3189
3190                 if (strpos($body, $url)) {
3191                         return true;
3192                 }
3193
3194                 foreach ([0, 1, 2] as $size) {
3195                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3196                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
3197                                 return true;
3198                         }
3199                 }
3200
3201                 return false;
3202         }
3203
3204         /**
3205          * Replace visual attachments in the body
3206          *
3207          * @param array $attachments
3208          * @param string $body
3209          * @return string modified body
3210          */
3211         private static function replaceVisualAttachments(array $attachments, string $body): string
3212         {
3213                 DI::profiler()->startRecording('rendering');
3214
3215                 foreach ($attachments['visual'] as $attachment) {
3216                         if (!empty($attachment['preview'])) {
3217                                 $proxy   = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3218                                 $search  = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
3219                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3220
3221                                 $body = str_replace($search, $replace, $body);
3222                         } elseif ($attachment['filetype'] == 'image') {
3223                                 $proxy   = Post\Media::getUrlForId($attachment['id']);
3224                                 $search  = ['[img=' . $attachment['url'] . ']', ']' . $attachment['url'] . '[/img]'];
3225                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3226
3227                                 $body = str_replace($search, $replace, $body);
3228                         }
3229                 }
3230                 DI::profiler()->stopRecording();
3231                 return $body;
3232         }
3233
3234         /**
3235          * Add visual attachments to the content
3236          *
3237          * @param array $attachments
3238          * @param array $item
3239          * @param string $content
3240          * @return string modified content
3241          */
3242         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
3243         {
3244                 DI::profiler()->startRecording('rendering');
3245                 $leading  = '';
3246                 $trailing = '';
3247                 $images   = [];
3248
3249                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3250                 foreach ($attachments['visual'] as $attachment) {
3251                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
3252                                 continue;
3253                         }
3254
3255                         if ($attachment['filetype'] == 'image') {
3256                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
3257                         } elseif (!empty($attachment['preview'])) {
3258                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3259                         } else {
3260                                 $preview_url = '';
3261                         }
3262
3263                         if ($preview_url && self::containsLink($item['body'], $preview_url)) {
3264                                 continue;
3265                         }
3266
3267                         if (($attachment['filetype'] == 'video')) {
3268                                 /// @todo Move the template to /content as well
3269                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3270                                         '$video' => [
3271                                                 'id'      => $attachment['id'],
3272                                                 'src'     => $attachment['url'],
3273                                                 'name'    => $attachment['name'] ?: $attachment['url'],
3274                                                 'preview' => $preview_url,
3275                                                 'mime'    => $attachment['mimetype'],
3276                                         ],
3277                                 ]);
3278                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3279                                         $leading .= $media;
3280                                 } else {
3281                                         $trailing .= $media;
3282                                 }
3283                         } elseif ($attachment['filetype'] == 'audio') {
3284                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3285                                         '$audio' => [
3286                                                 'id'     => $attachment['id'],
3287                                                 'src'    => $attachment['url'],
3288                                                 'name'   => $attachment['name'] ?: $attachment['url'],
3289                                                 'mime'   => $attachment['mimetype'],
3290                                         ],
3291                                 ]);
3292                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3293                                         $leading .= $media;
3294                                 } else {
3295                                         $trailing .= $media;
3296                                 }
3297                         } elseif ($attachment['filetype'] == 'image') {
3298                                 $src_url = Post\Media::getUrlForId($attachment['id']);
3299                                 if (self::containsLink($item['body'], $src_url)) {
3300                                         continue;
3301                                 }
3302                                 $images[] = ['src' => $src_url, 'preview' => $preview_url, 'attachment' => $attachment];
3303                         }
3304                 }
3305
3306                 $media = '';
3307                 if (count($images) > 1) {
3308                         $media = self::makeImageGrid($images);
3309                 } elseif (count($images) == 1) {
3310                         $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3311                                 '$image' => $images[0],
3312                         ]);
3313                 }
3314
3315                 // On Diaspora posts the attached pictures are leading
3316                 if ($item['network'] == Protocol::DIASPORA) {
3317                         $leading .= $media;
3318                 } else {
3319                         $trailing .= $media;
3320                 }
3321
3322                 if ($shared) {
3323                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '</div>' . BBCode::TOP_ANCHOR, $content);
3324                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '</div>' . BBCode::BOTTOM_ANCHOR, $content);
3325                 } else {
3326                         if ($leading != '') {
3327                                 $content = '<div class="body-attach">' . $leading . '</div>' . $content;
3328                         }
3329
3330                         if ($trailing != '') {
3331                                 $content .= '<div class="body-attach">' . $trailing . '</div>';
3332                         }
3333                 }
3334
3335                 DI::profiler()->stopRecording();
3336                 return $content;
3337         }
3338
3339         /**
3340          * Add link attachment to the content
3341          *
3342          * @param array  $attachments
3343          * @param string $body
3344          * @param string $content
3345          * @param bool   $shared
3346          * @param array  $ignore_links A list of URLs to ignore
3347          * @return string modified content
3348          */
3349         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3350         {
3351                 DI::profiler()->startRecording('rendering');
3352                 // Don't show a preview when there is a visual attachment (audio or video)
3353                 $types = array_column($attachments['visual'], 'type');
3354                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3355
3356                 if (!empty($attachments['link'])) {
3357                         foreach ($attachments['link'] as $link) {
3358                                 $found = false;
3359                                 foreach ($ignore_links as $ignore_link) {
3360                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3361                                                 $found = true;
3362                                         }
3363                                 }
3364                                 // @todo Judge between the links to use the one with most information
3365                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3366                                         (empty($attachment['name']) && !empty($link['name'])) ||
3367                                         (empty($attachment['description']) && !empty($link['description'])) ||
3368                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3369                                         $attachment = $link;
3370                                 }
3371                         }
3372                 }
3373
3374                 if (!empty($attachment)) {
3375                         $data = [
3376                                 'after' => '',
3377                                 'author_name' => $attachment['author-name'] ?? '',
3378                                 'author_url' =>  $attachment['author-url'] ?? '',
3379                                 'description' => $attachment['description'] ?? '',
3380                                 'image' => '',
3381                                 'preview' => '',
3382                                 'provider_name' => $attachment['publisher-name'] ?? '',
3383                                 'provider_url' => $attachment['publisher-url'] ?? '',
3384                                 'text' => '',
3385                                 'title' => $attachment['name'] ?? '',
3386                                 'type' => 'link',
3387                                 'url' => $attachment['url']];
3388
3389                         if ($preview && !empty($attachment['preview'])) {
3390                                 if ($attachment['preview-width'] >= 500) {
3391                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3392                                 } else {
3393                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3394                                 }
3395                         }
3396
3397                         if (!empty($data['description']) && !empty($content)) {
3398                                 similar_text($data['description'], $content, $percent);
3399                         } else {
3400                                 $percent = 0;
3401                         }
3402
3403                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3404                                 $data['description'] = '';
3405                         }
3406
3407                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3408                                 $data['author_name'] = '';
3409                         }
3410
3411                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3412                                 $data['author_url'] = '';
3413                         }
3414                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3415                         $data = BBCode::getAttachmentData($match[1]);
3416                 }
3417                 DI::profiler()->stopRecording();
3418
3419                 if (isset($data['url']) && !in_array(strtolower($data['url']), $ignore_links)) {
3420                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3421                                 $parts = parse_url($data['url']);
3422                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3423                                         if (empty($data['provider_name'])) {
3424                                                 $data['provider_name'] = $parts['host'];
3425                                         }
3426                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3427                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3428
3429                                                 if (!empty($parts['port'])) {
3430                                                         $data['provider_url'] .= ':' . $parts['port'];
3431                                                 }
3432                                         }
3433                                 }
3434
3435                                 // @todo Use a template
3436                                 $preview_mode = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'preview_mode', BBCode::PREVIEW_LARGE);
3437                                 if ($preview_mode != BBCode::PREVIEW_NONE) {
3438                                         $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid, $preview_mode);
3439                                 } else {
3440                                         $rendered = '';
3441                                 }
3442                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3443                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3444                                         '$url'   => $data['url'],
3445                                         '$title' => $data['title'],
3446                                 ]);
3447                         } else {
3448                                 return $content;
3449                         }
3450
3451                         if ($shared) {
3452                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3453                         } else {
3454                                 return $content . $rendered;
3455                         }
3456                 }
3457                 return $content;
3458         }
3459
3460         /**
3461          * Add non visual attachments to the content
3462          *
3463          * @param array $attachments
3464          * @param array $item
3465          * @param string $content
3466          * @return string modified content
3467          */
3468         private static function addNonVisualAttachments(array $attachments, array $item, string $content): string
3469         {
3470                 DI::profiler()->startRecording('rendering');
3471                 $trailing = '';
3472                 foreach ($attachments['additional'] as $attachment) {
3473                         if (strpos($item['body'], $attachment['url'])) {
3474                                 continue;
3475                         }
3476
3477                         $author = ['uid' => 0, 'id' => $item['author-id'],
3478                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3479                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3480
3481                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3482
3483                         if (!empty($attachment['size'])) {
3484                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3485                         }
3486
3487                         /// @todo Use a template
3488                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3489                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3490                 }
3491
3492                 if ($trailing != '') {
3493                         $content .= '<div class="body-attach">' . $trailing . '</div>';
3494                 }
3495
3496                 DI::profiler()->stopRecording();
3497                 return $content;
3498         }
3499
3500         private static function addQuestions(array $item, string $content): string
3501         {
3502                 DI::profiler()->startRecording('rendering');
3503                 if (!empty($item['question-id'])) {
3504                         $question = [
3505                                 'id'       => $item['question-id'],
3506                                 'multiple' => $item['question-multiple'],
3507                                 'voters'   => $item['question-voters'],
3508                                 'endtime'  => $item['question-end-time']
3509                         ];
3510
3511                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3512                         foreach ($options as $key => $option) {
3513                                 if ($question['voters'] > 0) {
3514                                         $percent = $option['replies'] / $question['voters'] * 100;
3515                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%3$d%%, %1$d vote)', '%2$s (%3$d%%, %1$d votes)', $option['replies'], $option['name'], round($percent, 1));
3516                                 } else {
3517                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name']);
3518                                 }
3519                         }
3520
3521                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3522                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3523                         } elseif (!empty($question['voters'])) {
3524                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
3525                         } elseif (!empty($question['endtime'])) {
3526                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3527                         } else {
3528                                 $summary = '';
3529                         }
3530
3531                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3532                                 '$question' => $question,
3533                                 '$options'  => $options,
3534                                 '$summary'  => $summary,
3535                         ]);
3536         }
3537                 DI::profiler()->stopRecording();
3538                 return $content;
3539         }
3540
3541         /**
3542          * get private link for item
3543          *
3544          * @param array $item
3545          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3546          * @throws \Exception
3547          */
3548         public static function getPlink(array $item)
3549         {
3550                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3551                         $plink = $item['plink'];
3552                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3553                         $plink = $item['uri'];
3554                 }
3555
3556                 if (DI::userSession()->getLocalUserId()) {
3557                         $ret = [
3558                                 'href' => "display/" . $item['guid'],
3559                                 'orig' => "display/" . $item['guid'],
3560                                 'title' => DI::l10n()->t('View on separate page'),
3561                                 'orig_title' => DI::l10n()->t('View on separate page'),
3562                         ];
3563
3564                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3565                                 $author = ['uid' => 0, 'id' => $item['author-id'],
3566                                         'network' => $item['author-network'], 'url' => $item['author-link']];
3567                                 $plink = Contact::magicLinkByContact($author, $plink);
3568                         }
3569
3570                         if (!empty($plink)) {
3571                                 $ret['href'] = DI::baseUrl()->remove($plink);
3572                                 $ret['title'] = DI::l10n()->t('Link to source');
3573                         }
3574                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3575                         $ret = [
3576                                 'href' => $plink,
3577                                 'orig' => $plink,
3578                                 'title' => DI::l10n()->t('Link to source'),
3579                                 'orig_title' => DI::l10n()->t('Link to source'),
3580                         ];
3581                 } else {
3582                         $ret = [];
3583                 }
3584
3585                 return $ret;
3586         }
3587
3588         /**
3589          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3590          *
3591          * @param int $uri_id
3592          *
3593          * @return boolean "true" when it is a forum post
3594          */
3595         public static function isForumPost(int $uri_id): bool
3596         {
3597                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3598                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3599                                 return true;
3600                         }
3601                 }
3602                 return false;
3603         }
3604
3605         /**
3606          * Search item id for given URI or plink
3607          *
3608          * @param string $uri
3609          * @param integer $uid
3610          *
3611          * @return integer item id
3612          */
3613         public static function searchByLink(string $uri, int $uid = 0): int
3614         {
3615                 $ssl_uri = str_replace('http://', 'https://', $uri);
3616                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3617
3618                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3619                 if (DBA::isResult($item)) {
3620                         return $item['id'];
3621                 }
3622
3623                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3624                 if (DBA::isResult($item)) {
3625                         return $item['id'];
3626                 }
3627
3628                 return 0;
3629         }
3630
3631         /**
3632          * Return the URI for a link to the post
3633          *
3634          * @param string $uri URI or link to post
3635          *
3636          * @return string URI
3637          */
3638         public static function getURIByLink(string $uri): string
3639         {
3640                 $ssl_uri = str_replace('http://', 'https://', $uri);
3641                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3642
3643                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3644                 if (DBA::isResult($item)) {
3645                         return $item['uri'];
3646                 }
3647
3648                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3649                 if (DBA::isResult($item)) {
3650                         return $item['uri'];
3651                 }
3652
3653                 return '';
3654         }
3655
3656         /**
3657          * Fetches item for given URI or plink
3658          *
3659          * @param string $uri
3660          * @param integer $uid
3661          *
3662          * @return integer item id
3663          */
3664         public static function fetchByLink(string $uri, int $uid = 0): int
3665         {
3666                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3667                 $item_id = self::searchByLink($uri, $uid);
3668                 if (!empty($item_id)) {
3669                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3670                         return $item_id;
3671                 }
3672
3673                 $hookData = [
3674                         'uri'     => $uri,
3675                         'uid'     => $uid,
3676                         'item_id' => null,
3677                 ];
3678
3679                 Hook::callAll('item_by_link', $hookData);
3680
3681                 if (isset($hookData['item_id'])) {
3682                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3683                 }
3684
3685                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri);
3686
3687                 if ($fetched_uri) {
3688                         $item_id = self::searchByLink($fetched_uri, $uid);
3689                 } else {
3690                         $item_id = Diaspora::fetchByURL($uri);
3691                 }
3692
3693                 if (!empty($item_id)) {
3694                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3695                         return $item_id;
3696                 }
3697
3698                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3699                 return 0;
3700         }
3701
3702         /**
3703          * Fetch the uri-id of a quote
3704          *
3705          * @param string $body
3706          * @return integer
3707          */
3708         public static function getQuoteUriId(string $body, int $uid = 0): int
3709         {
3710                 $shared = BBCode::fetchShareAttributes($body);
3711                 if (empty($shared['guid']) && empty($shared['message_id'])) {
3712                         return 0;
3713                 }
3714
3715                 if (empty($shared['link']) && empty($shared['message_id'])) {
3716                         Logger::notice('Invalid share block.', ['share' => $shared]);
3717                         return 0;
3718                 }
3719
3720                 if (!empty($shared['guid'])) {
3721                         $shared_item = Post::selectFirst(['uri-id'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3722                         if (!empty($shared_item['uri-id'])) {
3723                                 Logger::debug('Found post by guid', ['guid' => $shared['guid'], 'uid' => $uid]);
3724                                 return $shared_item['uri-id'];
3725                         }
3726                 }
3727
3728                 if (!empty($shared['message_id'])) {
3729                         $shared_item = Post::selectFirst(['uri-id'], ['uri' => $shared['message_id'], 'uid' => [0, $uid]]);
3730                         if (!empty($shared_item['uri-id'])) {
3731                                 Logger::debug('Found post by message_id', ['message_id' => $shared['message_id'], 'uid' => $uid]);
3732                                 return $shared_item['uri-id'];
3733                         }
3734                 }
3735
3736                 if (!empty($shared['link'])) {
3737                         $shared_item = Post::selectFirst(['uri-id'], ['plink' => $shared['link'], 'uid' => [0, $uid]]);
3738                         if (!empty($shared_item['uri-id'])) {
3739                                 Logger::debug('Found post by link', ['link' => $shared['link'], 'uid' => $uid]);
3740                                 return $shared_item['uri-id'];
3741                         }
3742                 }
3743
3744                 $url = $shared['message_id'] ?: $shared['link'];
3745                 $id = self::fetchByLink($url);
3746                 if (!$id) {
3747                         Logger::notice('Post could not be fetched.', ['url' => $url, 'uid' => $uid]);
3748                         return 0;
3749                 }
3750
3751                 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
3752                 if (!empty($shared_item['uri-id'])) {
3753                         Logger::debug('Fetched shared post', ['id' => $id, 'url' => $url, 'uid' => $uid]);
3754                         return $shared_item['uri-id'];
3755                 }
3756
3757                 Logger::warning('Post does not exist although it was supposed to had been fetched.', ['id' => $id, 'url' => $url, 'uid' => $uid]);
3758                 return 0;
3759         }
3760 }