src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2024, 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\Contact\LocalRelationship\Entity\LocalRelationship;
  25 use Friendica\Content\Image;
  26 use Friendica\Content\Post\Collection\PostMedias;
  27 use Friendica\Content\Post\Entity\PostMedia;
  28 use Friendica\Content\Text\BBCode;
  29 use Friendica\Content\Text\HTML;
  30 use Friendica\Core\Hook;
  31 use Friendica\Core\Logger;
  32 use Friendica\Core\Protocol;
  33 use Friendica\Core\Renderer;
  34 use Friendica\Core\System;
  35 use Friendica\Core\Worker;
  36 use Friendica\Database\DBA;
  37 use Friendica\DI;
  38 use Friendica\Model\Post\Category;
  39 use Friendica\Network\HTTPException\InternalServerErrorException;
  40 use Friendica\Network\HTTPException\ServiceUnavailableException;
  41 use Friendica\Protocol\Activity;
  42 use Friendica\Protocol\ActivityPub;
  43 use Friendica\Protocol\Delivery;
  44 use Friendica\Protocol\Diaspora;
  45 use Friendica\Util\DateTimeFormat;
  46 use Friendica\Util\Map;
  47 use Friendica\Util\Network;
  48 use Friendica\Util\Proxy;
  49 use Friendica\Util\Strings;
  50 use Friendica\Util\Temporal;
  51 use GuzzleHttp\Psr7\Uri;
  52 use LanguageDetection\Language;
  53
  54 class Item
  55 {
  56         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  57         const PT_ARTICLE = 0;
  58         const PT_NOTE = 1;
  59         const PT_PAGE = 2;
  60         const PT_IMAGE = 16;
  61         const PT_AUDIO = 17;
  62         const PT_VIDEO = 18;
  63         const PT_DOCUMENT = 19;
  64         const PT_EVENT = 32;
  65         const PT_POLL = 33;
  66         const PT_PERSONAL_NOTE = 128;
  67
  68         // Posting reasons (Why had a post been stored for a user?)
  69         const PR_NONE = 0;
  70         const PR_TAG = 64;
  71         const PR_TO = 65;
  72         const PR_CC = 66;
  73         const PR_BTO = 67;
  74         const PR_BCC = 68;
  75         const PR_FOLLOWER = 69;
  76         const PR_ANNOUNCEMENT = 70;
  77         const PR_COMMENT = 71;
  78         const PR_STORED = 72;
  79         const PR_GLOBAL = 73;
  80         const PR_RELAY = 74;
  81         const PR_FETCHED = 75;
  82         const PR_COMPLETION = 76;
  83         const PR_DIRECT = 77;
  84         const PR_ACTIVITY = 78;
  85         const PR_DISTRIBUTE = 79;
  86         const PR_PUSHED = 80;
  87         const PR_LOCAL = 81;
  88         const PR_AUDIENCE = 82;
  89
  90         // system.accept_only_sharer setting values
  91         const COMPLETION_NONE    = 1;
  92         const COMPLETION_COMMENT = 0;
  93         const COMPLETION_LIKE    = 2;
  94
  95         // Field list that is used to display the items
  96         const DISPLAY_FIELDLIST = [
  97                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  98                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri', 'conversation',
  99                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
 100                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
 101                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
 102                 'quote-uri', 'quote-uri-id', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
 103                 'author-id', 'author-link', 'author-alias', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-baseurl', 'author-addr', 'author-uri-id',
 104                 'owner-id', 'owner-link', 'owner-alias', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated', 'owner-gsid',
 105                 'causer-id', 'causer-link', 'causer-alias', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network', 'causer-gsid',
 106                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
 107                 'writable', 'self', 'cid', 'alias',
 108                 'event-created', 'event-edited', 'event-start', 'event-finish',
 109                 'event-summary', 'event-desc', 'event-location', 'event-type',
 110                 'event-nofinish', 'event-ignore', 'event-id',
 111                 'question-id', 'question-multiple', 'question-voters', 'question-end-time',
 112                 'has-categories', 'has-media',
 113                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
 114         ];
 115
 116         // Field list that is used to deliver items via the protocols
 117         const DELIVER_FIELDLIST = [
 118                 'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 119                 'parent-guid', 'conversation', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 120                 'private', 'title', 'body', 'raw-body', 'language', 'location', 'coord', 'app',
 121                 'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 122                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 123                 'author-id', 'author-addr', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 124                 'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 125                 'thr-parent-id', 'parent-uri-id', 'quote-uri', 'quote-uri-id', 'postopts', 'pubmail',
 126                 'event-created', 'event-edited', 'event-start', 'event-finish',
 127                 'event-summary', 'event-desc', 'event-location', 'event-type',
 128                 'event-nofinish', 'event-ignore', 'event-id'
 129         ];
 130
 131         // All fields in the item table
 132         const ITEM_FIELDLIST = [
 133                 'id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 134                 'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'conversation', 'vid',
 135                 'quote-uri', 'quote-uri-id', 'contact-id', 'wall', 'gravity', 'extid', 'psid',
 136                 'created', 'edited', 'commented', 'received', 'changed', 'verb',
 137                 'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 138                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 139                 'private', 'pubmail', 'visible', 'starred',
 140                 'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 141                 'title', 'content-warning', 'body', 'language', 'location', 'coord', 'app',
 142                 'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 143                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 144                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'
 145         ];
 146
 147         // List of all verbs that don't need additional content data.
 148         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 149         const ACTIVITIES = [
 150                 Activity::LIKE, Activity::DISLIKE,
 151                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 152                 Activity::FOLLOW,
 153                 Activity::ANNOUNCE
 154         ];
 155
 156         // Privacy levels
 157         const PUBLIC = 0;
 158         const PRIVATE = 1;
 159         const UNLISTED = 2;
 160
 161         // Item weight for query ordering
 162         const GRAVITY_PARENT   = 0;
 163         const GRAVITY_ACTIVITY = 3;
 164         const GRAVITY_COMMENT  = 6;
 165         const GRAVITY_UNKNOWN  = 9;
 166
 167         /**
 168          * Update existing item entries
 169          *
 170          * @param array $fields    The fields that are to be changed
 171          * @param array $condition The condition for finding the item entries
 172          *
 173          * In the future we may have to change permissions as well.
 174          * Then we had to add the user id as third parameter.
 175          *
 176          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 177          *
 178          * @return integer|boolean number of affected rows - or "false" if there was an error
 179          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 180          */
 181         public static function update(array $fields, array $condition)
 182         {
 183                 if (empty($condition) || empty($fields)) {
 184                         return false;
 185                 }
 186
 187                 if (isset($fields['extid'])) {
 188                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 189                 }
 190
 191                 if (!empty($fields['verb'])) {
 192                         $fields['vid'] = Verb::getID($fields['verb']);
 193                 }
 194
 195                 if (!empty($fields['edited'])) {
 196                         $previous = Post::selectFirst(['edited'], $condition);
 197                 }
 198
 199                 if (!empty($fields['body'])) {
 200                         $fields['body'] = self::setHashtags($fields['body']);
 201                 }
 202
 203                 $rows = Post::update($fields, $condition);
 204                 if (is_bool($rows)) {
 205                         return $rows;
 206                 }
 207
 208                 // We only need to call the line by line update for specific fields
 209                 if (
 210                         empty($fields['body']) && empty($fields['file']) &&
 211                         empty($fields['attach']) && empty($fields['edited'])
 212                 ) {
 213                         return $rows;
 214                 }
 215
 216                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 217
 218                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network', 'quote-uri-id'], $condition);
 219
 220                 $notify_items = [];
 221
 222                 while ($item = DBA::fetch($items)) {
 223                         if (!empty($fields['body'])) {
 224                                 if (!empty($item['quote-uri-id'])) {
 225                                         $fields['body'] = BBCode::removeSharedData($fields['body']);
 226
 227                                         if (!empty($fields['raw-body'])) {
 228                                                 $fields['raw-body'] = BBCode::removeSharedData($fields['raw-body']);
 229                                         }
 230                                 }
 231
 232                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 233
 234                                 // Remove all media attachments from the body and store them in the post-media table
 235                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 236                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 237                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 238
 239                                 Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body'], $fields['body'], $item['author-network']);
 240
 241                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 242                                 $content_fields['raw-body'] = BBCode::removeAttachment($content_fields['raw-body']);
 243
 244                                 Post\Content::update($item['uri-id'], $content_fields);
 245                         }
 246
 247                         if (!empty($fields['file'])) {
 248                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 249                         }
 250
 251                         if (!empty($fields['attach'])) {
 252                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 253                         }
 254
 255                         // We only need to notify others when it is an original entry from us.
 256                         // Only call the notifier when the item had been edited and records had been changed.
 257                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 258                                 $notify_items[] = $item['id'];
 259                         }
 260                 }
 261
 262                 DBA::close($items);
 263
 264                 foreach ($notify_items as $notify_item) {
 265                         $post = Post::selectFirst([], ['id' => $notify_item]);
 266
 267                         if ($post['gravity'] != self::GRAVITY_PARENT) {
 268                                 $signed = Diaspora::createCommentSignature($post);
 269                                 if (!empty($signed)) {
 270                                         DBA::replace('diaspora-interaction', ['uri-id' => $post['uri-id'], 'interaction' => json_encode($signed)]);
 271                                 }
 272                         }
 273
 274                         Worker::add(Worker::PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 275                 }
 276
 277                 return $rows;
 278         }
 279
 280         /**
 281          * Delete an item and notify others about it - if it was ours
 282          *
 283          * @param array   $condition The condition for finding the item entries
 284          * @param integer $priority  Priority for the notification
 285          * @return void
 286          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 287          */
 288         public static function markForDeletion(array $condition, int $priority = Worker::PRIORITY_HIGH)
 289         {
 290                 $items = Post::select(['id'], $condition);
 291                 while ($item = Post::fetch($items)) {
 292                         self::markForDeletionById($item['id'], $priority);
 293                 }
 294                 DBA::close($items);
 295         }
 296
 297         /**
 298          * Delete an item for an user and notify others about it - if it was ours
 299          *
 300          * @param array   $condition The condition for finding the item entries
 301          * @param integer $uid       User who wants to delete this item
 302          * @return void
 303          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 304          */
 305         public static function deleteForUser(array $condition, int $uid)
 306         {
 307                 if ($uid == 0) {
 308                         return;
 309                 }
 310
 311                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 312                 while ($item = Post::fetch($items)) {
 313                         if (in_array($item['uid'], [$uid, 0])) {
 314                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 315                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 316                         }
 317
 318                         if ($item['uid'] == $uid) {
 319                                 self::markForDeletionById($item['id'], Worker::PRIORITY_HIGH);
 320                         } elseif ($item['uid'] != 0) {
 321                                 Logger::warning('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 322                         }
 323                 }
 324                 DBA::close($items);
 325         }
 326
 327         /**
 328          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 329          *
 330          * @param integer $item_id
 331          * @param integer $priority Priority for the notification
 332          * @return boolean success
 333          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 334          */
 335         public static function markForDeletionById(int $item_id, int $priority = Worker::PRIORITY_HIGH): bool
 336         {
 337                 Logger::info('Mark item for deletion by id', ['id' => $item_id]);
 338                 // locate item to be deleted
 339                 $fields = [
 340                         'id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 341                         'thr-parent-id', 'deleted', 'resource-id', 'event-id', 'vid', 'body',
 342                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'
 343                 ];
 344                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 345                 if (!DBA::isResult($item)) {
 346                         Logger::info('Item not found.', ['id' => $item_id]);
 347                         return false;
 348                 }
 349
 350                 if ($item['deleted']) {
 351                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 352                         return false;
 353                 }
 354
 355                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 356                 if (!DBA::isResult($parent)) {
 357                         $parent = ['origin' => false];
 358                 }
 359
 360                 // clean up categories and tags so they don't end up as orphans
 361                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 362
 363                 /*
 364                  * If item is a link to a photo resource, nuke all the associated photos
 365                  * (visitors will not have photo resources)
 366                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 367                  * generate a resource-id and therefore aren't intimately linked to the item.
 368                  */
 369                 /// @TODO: this should first check if photo is used elsewhere
 370                 if ($item['resource-id']) {
 371                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 372                 }
 373
 374                 // If item is a link to an event, delete the event.
 375                 if (intval($item['event-id'])) {
 376                         Event::delete($item['event-id']);
 377                 }
 378
 379                 // If item has attachments, drop them
 380                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 381                 foreach ($attachments as $attachment) {
 382                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 383                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 384                         }
 385                 }
 386
 387                 // Set the item to "deleted"
 388                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 389                 Post::update($item_fields, ['id' => $item['id']]);
 390
 391                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 392
 393                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 394                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 395                 }
 396
 397                 Post\DeliveryData::delete($item['uri-id']);
 398
 399                 // If it's the parent of a comment thread, kill all the kids
 400                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 401                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 402                 }
 403
 404                 // Is it our comment and/or our thread?
 405                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 406                         // When we delete the original post we will delete all existing copies on the server as well
 407                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 408
 409                         // send the notification upstream/downstream
 410                         if ($priority) {
 411                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 412                         }
 413                 } elseif ($item['uid'] != 0) {
 414                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 415                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 416                 }
 417
 418                 DI::notify()->deleteForItem($item['uri-id']);
 419                 DI::notification()->deleteForItem($item['uri-id']);
 420
 421                 if (in_array($item['gravity'], [self::GRAVITY_ACTIVITY, self::GRAVITY_COMMENT])) {
 422                         Post\Counts::update($item['thr-parent-id'], $item['parent-uri-id'], $item['vid'], $item['verb'], $item['body']);
 423                 }
 424
 425                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 426
 427                 return true;
 428         }
 429
 430         /**
 431          * Get guid from given item record
 432          *
 433          * @param array $item Item record
 434          * @param bool Whether to notify (?)
 435          * @return string Guid
 436          */
 437         public static function guid(array $item, bool $notify): string
 438         {
 439                 if (!empty($item['guid'])) {
 440                         return trim($item['guid']);
 441                 }
 442
 443                 if ($notify) {
 444                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 445                         // We add the hash of our own host because our host is the original creator of the post.
 446                         $prefix_host = DI::baseUrl()->getHost();
 447                 } else {
 448                         $prefix_host = '';
 449
 450                         // We are only storing the post so we create a GUID from the original hostname.
 451                         if (!empty($item['author-link'])) {
 452                                 $parsed = parse_url($item['author-link']);
 453                                 if (!empty($parsed['host'])) {
 454                                         $prefix_host = $parsed['host'];
 455                                 }
 456                         }
 457
 458                         if (empty($prefix_host) && !empty($item['plink'])) {
 459                                 $parsed = parse_url($item['plink']);
 460                                 if (!empty($parsed['host'])) {
 461                                         $prefix_host = $parsed['host'];
 462                                 }
 463                         }
 464
 465                         if (empty($prefix_host) && !empty($item['uri'])) {
 466                                 $parsed = parse_url($item['uri']);
 467                                 if (!empty($parsed['host'])) {
 468                                         $prefix_host = $parsed['host'];
 469                                 }
 470                         }
 471
 472                         // Is it in the format data@host.tld? - Used for mail contacts
 473                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 474                                 $mailparts = explode('@', $item['author-link']);
 475                                 $prefix_host = array_pop($mailparts);
 476                         }
 477                 }
 478
 479                 if (!empty($item['plink'])) {
 480                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 481                 } elseif (!empty($item['uri'])) {
 482                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 483                 } else {
 484                         $guid = System::createUUID(hash('crc32', $prefix_host));
 485                 }
 486
 487                 return $guid;
 488         }
 489
 490         /**
 491          * Returns contact id from given item record
 492          *
 493          * @param array $item Item record
 494          * @return int Contact id
 495          */
 496         private static function contactId(array $item): int
 497         {
 498                 if ($item['uid'] == 0) {
 499                         return $item['owner-id'];
 500                 }
 501
 502                 if ($item['origin']) {
 503                         $owner = User::getOwnerDataById($item['uid']);
 504                         return $owner['id'];
 505                 }
 506
 507                 $contact_id      = 0;
 508                 $user_contact_id = 0;
 509                 foreach (['group-link', 'causer-link', 'owner-link', 'author-link'] as $field) {
 510                         if (empty($item[$field])) {
 511                                 continue;
 512                         }
 513                         if (!$user_contact_id && Contact::isSharingByURL($item[$field], $item['uid'], true)) {
 514                                 $user_contact_id = Contact::getIdForURL($item[$field], $item['uid']);
 515                         } elseif (!$contact_id) {
 516                                 $contact_id = Contact::getIdForURL($item[$field]);
 517                         }
 518                 }
 519
 520                 if ($user_contact_id) {
 521                         return $user_contact_id;
 522                 }
 523
 524                 if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $item['uid'], true)) {
 525                         $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $item['uid']);
 526                         if (!empty($cdata['user'])) {
 527                                 return $cdata['user'];
 528                         }
 529                 }
 530
 531                 if ($contact_id) {
 532                         return $contact_id;
 533                 }
 534
 535                 Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $item['uid'], 'item' => $item]);
 536                 $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $item['uid']]);
 537                 return $self['id'];
 538         }
 539
 540         /**
 541          * Write an item array into a spool file to be inserted later.
 542          * This command is called whenever there are issues storing an item.
 543          *
 544          * @param array $item The item fields that are to be inserted
 545          * @throws \Exception
 546          */
 547         private static function spool(array $item)
 548         {
 549                 // Now we store the data in the spool directory
 550                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 551                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 552
 553                 $spoolpath = System::getSpoolPath();
 554                 if ($spoolpath != '') {
 555                         $spool = $spoolpath . '/' . $file;
 556
 557                         file_put_contents($spool, json_encode($item));
 558                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 559                 }
 560         }
 561
 562         /**
 563          * Check if the item array is a duplicate
 564          *
 565          * @param array $item Item record
 566          * @return boolean is it a duplicate?
 567          */
 568         private static function isDuplicate(array $item): bool
 569         {
 570                 // Checking if there is already an item with the same guid
 571                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 572                 if (Post::exists($condition)) {
 573                         Logger::notice('Found already existing item', $condition);
 574                         return true;
 575                 }
 576
 577                 $condition = [
 578                         'uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 579                         'network' => [$item['network'], Protocol::DFRN]
 580                 ];
 581                 if (Post::exists($condition)) {
 582                         Logger::notice('duplicated item with the same uri found.', $condition);
 583                         return true;
 584                 }
 585
 586                 // On Friendica and Diaspora the GUID is unique
 587                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 588                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 589                         if (Post::exists($condition)) {
 590                                 Logger::notice('duplicated item with the same guid found.', $condition);
 591                                 return true;
 592                         }
 593                 } elseif ($item['network'] == Protocol::OSTATUS) {
 594                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 595                         $condition = [
 596                                 "`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 597                                 $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']
 598                         ];
 599                         if (Post::exists($condition)) {
 600                                 Logger::notice('duplicated item with the same body found.', $item);
 601                                 return true;
 602                         }
 603                 }
 604
 605                 /*
 606                  * Check for already added items.
 607                  * There is a timing issue here that sometimes creates double postings.
 608                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 609                  */
 610                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 611                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 612                         return true;
 613                 }
 614
 615                 return false;
 616         }
 617
 618         /**
 619          * Check if the item array is valid
 620          *
 621          * @param array $item Item record
 622          * @return boolean item is valid
 623          */
 624         public static function isValid(array $item): bool
 625         {
 626                 // When there is no content then we don't post it
 627                 if (($item['body'] . $item['title'] == '') && empty($item['quote-uri-id']) && empty($item['attachments']) && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 628                         Logger::notice('No body, no title.');
 629                         return false;
 630                 }
 631
 632                 if (!empty($item['uid'])) {
 633                         $owner = User::getOwnerDataById($item['uid'], false);
 634                         if (!$owner) {
 635                                 Logger::warning('Missing item user owner data', ['uid' => $item['uid']]);
 636                                 return false;
 637                         }
 638
 639                         if ($owner['account_expired'] || $owner['account_removed']) {
 640                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 641                                 return false;
 642                         }
 643                 }
 644
 645                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 646                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 647                         return false;
 648                 }
 649
 650                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 651                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 652                         return false;
 653                 }
 654
 655                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 656                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 657                         return false;
 658                 }
 659
 660                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 661                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 662                         return false;
 663                 }
 664
 665                 if ($item['verb'] == Activity::FOLLOW) {
 666                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 667                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 668                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 669                                 return false;
 670                         }
 671
 672                         $condition = [
 673                                 'verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 674                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']
 675                         ];
 676                         if (Post::exists($condition)) {
 677                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 678                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 679                                 return false;
 680                         }
 681                 }
 682
 683                 return true;
 684         }
 685
 686         /**
 687          * Check if the item array is too old
 688          *
 689          * @param array $item Item record
 690          * @return boolean item is too old
 691          */
 692         public static function isTooOld(array $item): bool
 693         {
 694                 // check for create date and expire time
 695                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 696
 697                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 698                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 699                         $expire_interval = $user['expire'];
 700                 }
 701
 702                 if (($expire_interval > 0) && !empty($item['created'])) {
 703                         $expire_date = time() - ($expire_interval * 86400);
 704                         $created_date = strtotime($item['created']);
 705                         if ($created_date < $expire_date) {
 706                                 Logger::notice('Item created before expiration interval.', [
 707                                         'created' => date('c', $created_date),
 708                                         'expired' => date('c', $expire_date),
 709                                         '$item' => $item
 710                                 ]);
 711                                 return true;
 712                         }
 713                 }
 714
 715                 return false;
 716         }
 717
 718         /**
 719          * Return the id of the given item array if it has been stored before
 720          *
 721          * @param array $item Item record
 722          * @return integer Item id or zero on error
 723          */
 724         private static function getDuplicateID(array $item): int
 725         {
 726                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 727                         $condition = [
 728                                 '`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 729                                 $item['uri-id'],
 730                                 $item['uid'],
 731                                 Protocol::ACTIVITYPUB,
 732                                 Protocol::DIASPORA,
 733                                 Protocol::DFRN,
 734                                 Protocol::OSTATUS
 735                         ];
 736                         $existing = Post::selectFirst(['id', 'network'], $condition);
 737                         if (DBA::isResult($existing)) {
 738                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 739                                 if ($item['uid'] != 0) {
 740                                         Logger::notice('Item already existed for user', [
 741                                                 'uri-id' => $item['uri-id'],
 742                                                 'uid' => $item['uid'],
 743                                                 'network' => $item['network'],
 744                                                 'existing_id' => $existing['id'],
 745                                                 'existing_network' => $existing['network']
 746                                         ]);
 747                                 }
 748
 749                                 return $existing['id'];
 750                         }
 751                 }
 752                 return 0;
 753         }
 754
 755         /**
 756          * Fetch the uri-id of the parent for the given uri-id
 757          *
 758          * @param integer $uriid
 759          * @return integer
 760          */
 761         public static function getParent(int $uriid): int
 762         {
 763                 $thread_parent = Post::selectFirstPost(['thr-parent-id', 'gravity'], ['uri-id' => $uriid]);
 764                 if (empty($thread_parent)) {
 765                         return 0;
 766                 }
 767
 768                 if ($thread_parent['gravity'] == Item::GRAVITY_PARENT) {
 769                         return $uriid;
 770                 }
 771
 772                 return self::getParent($thread_parent['thr-parent-id']);
 773         }
 774
 775         /**
 776          * Fetch top-level parent data for the given item array
 777          *
 778          * @param array $item
 779          * @return array item array with parent data
 780          * @throws \Exception
 781          */
 782         private static function getTopLevelParent(array $item): array
 783         {
 784                 $fields = [
 785                         'uid', 'uri', 'parent-uri', 'id', 'deleted',
 786                         'uri-id', 'parent-uri-id',
 787                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 788                         'wall', 'private', 'origin', 'author-id'
 789                 ];
 790                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 791                 $params = ['order' => ['id' => false]];
 792                 $parent = Post::selectFirst($fields, $condition, $params);
 793
 794                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 795                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 796                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 797                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 798                         }
 799                         if ($stored) {
 800                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 801                                 $parent = Post::selectFirst($fields, $condition, $params);
 802                         }
 803                 }
 804
 805                 if (!DBA::isResult($parent)) {
 806                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 807                         return [];
 808                 }
 809
 810                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 811                         return $parent;
 812                 }
 813
 814                 $condition = [
 815                         'uri-id' => $parent['parent-uri-id'],
 816                         'parent-uri-id' => $parent['parent-uri-id'],
 817                         'uid' => $parent['uid']
 818                 ];
 819                 $params = ['order' => ['id' => false]];
 820                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 821
 822                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 823                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 824                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 825                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 826                 }
 827
 828                 if (!DBA::isResult($toplevel_parent)) {
 829                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 830                         return [];
 831                 }
 832
 833                 return $toplevel_parent;
 834         }
 835
 836         /**
 837          * Get the gravity for the given item array
 838          *
 839          * @param array $item
 840          * @return integer gravity
 841          */
 842         private static function getGravity(array $item): int
 843         {
 844                 $activity = DI::activity();
 845
 846                 if (isset($item['gravity'])) {
 847                         return intval($item['gravity']);
 848                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 849                         return self::GRAVITY_PARENT;
 850                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 851                         return self::GRAVITY_COMMENT;
 852                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 853                         return self::GRAVITY_ACTIVITY;
 854                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 855                         return self::GRAVITY_ACTIVITY;
 856                 }
 857
 858                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 859                 return self::GRAVITY_UNKNOWN;   // Should not happen
 860         }
 861
 862         private static function prepareOriginPost(array $item): array
 863         {
 864                 $item = DI::contentItem()->initializePost($item);
 865                 $item = DI::contentItem()->finalizePost($item);
 866
 867                 return $item;
 868         }
 869
 870         /**
 871          * Inserts item record
 872          *
 873          * @param array $item Item array to be inserted
 874          * @param int   $notify Notification (type?)
 875          * @param bool  $post_local (???)
 876          * @return int Zero means error, otherwise primary key (id) is being returned
 877          */
 878         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 879         {
 880                 $orig_item = $item;
 881
 882                 $priority = Worker::PRIORITY_HIGH;
 883
 884                 // If it is a posting where users should get notifications, then define it as wall posting
 885                 if ($notify) {
 886                         $item = self::prepareOriginPost($item);
 887
 888                         if (is_int($notify) && in_array($notify, Worker::PRIORITIES)) {
 889                                 $priority = $notify;
 890                         }
 891
 892                         // Mastodon style API visibility
 893                         $copy_permissions = ($item['visibility'] ?? 'private') == 'private';
 894                         unset($item['visibility']);
 895                 } else {
 896                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 897                 }
 898
 899                 $uid = intval($item['uid']);
 900
 901                 $item['guid'] = self::guid($item, $notify);
 902                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 903
 904                 // Store URI data
 905                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 906
 907                 // Backward compatibility: parent-uri used to be the direct parent uri.
 908                 // If it is provided without a thr-parent, it probably is the old behavior.
 909                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 910                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 911                         $item['parent-uri'] = $item['thr-parent'];
 912                 }
 913
 914                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 915                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 916
 917                 // Store conversation data
 918                 $source = $item['source'] ?? '';
 919                 unset($item['conversation-uri']);
 920                 unset($item['conversation-href']);
 921                 unset($item['source']);
 922
 923                 /*
 924                  * Do we already have this item?
 925                  * We have to check several networks since Friendica posts could be repeated
 926                  * via OStatus (maybe Diaspora as well)
 927                  */
 928                 $duplicate = self::getDuplicateID($item);
 929                 if ($duplicate) {
 930                         return $duplicate;
 931                 }
 932
 933                 // Additional duplicate checks
 934                 /// @todo Check why the first duplication check returns the item number and the second a 0
 935                 if (self::isDuplicate($item)) {
 936                         return 0;
 937                 }
 938
 939                 if (!isset($item['post-type'])) {
 940                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 941                 }
 942
 943                 $defined_permissions = isset($item['allow_cid']) && isset($item['allow_gid']) && isset($item['deny_cid']) && isset($item['deny_gid']) && isset($item['private']);
 944
 945                 $item['wall']          = intval($item['wall'] ?? 0);
 946                 $item['extid']         = trim($item['extid'] ?? '');
 947                 $item['author-name']   = trim($item['author-name'] ?? '');
 948                 $item['author-link']   = trim($item['author-link'] ?? '');
 949                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 950                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 951                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 952                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 953                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 954                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 955                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 956                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 957                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 958                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 959                 $item['location']      = trim($item['location'] ?? '');
 960                 $item['coord']         = trim($item['coord'] ?? '');
 961                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 962                 $item['deleted']       = 0;
 963                 $item['verb']          = trim($item['verb'] ?? '');
 964                 $item['object-type']   = trim($item['object-type'] ?? '');
 965                 $item['object']        = trim($item['object'] ?? '');
 966                 $item['target-type']   = trim($item['target-type'] ?? '');
 967                 $item['target']        = trim($item['target'] ?? '');
 968                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 969                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 970                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 971                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 972                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 973                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 974                 $item['body']          = trim($item['body'] ?? '');
 975                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 976                 $item['app']           = trim($item['app'] ?? '');
 977                 $item['origin']        = intval($item['origin'] ?? 0);
 978                 $item['postopts']      = trim($item['postopts'] ?? '');
 979                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 980                 $item['event-id']      = intval($item['event-id'] ?? 0);
 981                 $item['inform']        = trim($item['inform'] ?? '');
 982                 $item['file']          = trim($item['file'] ?? '');
 983
 984                 // Communities aren't working with the Diaspora protocol
 985                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 986                         $user = User::getById($uid, ['account-type']);
 987                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 988                                 Logger::info('Community posts are not supported via Diaspora');
 989                                 return 0;
 990                         }
 991                 }
 992
 993                 // Items cannot be stored before they happen ...
 994                 if ($item['created'] > DateTimeFormat::utcNow()) {
 995                         $item['created'] = DateTimeFormat::utcNow();
 996                 }
 997
 998                 // We haven't invented time travel by now.
 999                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1000                         $item['edited'] = DateTimeFormat::utcNow();
1001                 }
1002
1003                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1004
1005                 $item['gravity'] = self::getGravity($item);
1006
1007                 $default = [
1008                         'url' => $item['author-link'], 'name' => $item['author-name'],
1009                         'photo' => $item['author-avatar'], 'network' => $item['network']
1010                 ];
1011                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
1012
1013                 $default = [
1014                         'url' => $item['owner-link'], 'name' => $item['owner-name'],
1015                         'photo' => $item['owner-avatar'], 'network' => $item['network']
1016                 ];
1017                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1018
1019                 $item['post-reason'] = self::getPostReason($item);
1020
1021                 // Ensure that there is an avatar cache
1022                 Contact::checkAvatarCache($item['author-id']);
1023                 Contact::checkAvatarCache($item['owner-id']);
1024
1025                 $item['contact-id'] = self::contactId($item);
1026
1027                 if (
1028                         !empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
1029                         empty($item['origin']) && self::isTooOld($item)
1030                 ) {
1031                         Logger::info('Item is too old', ['item' => $item]);
1032                         return 0;
1033                 }
1034
1035                 if (!self::isValid($item)) {
1036                         return 0;
1037                 }
1038
1039                 if ($item['gravity'] !== self::GRAVITY_PARENT) {
1040                         $toplevel_parent = self::getTopLevelParent($item);
1041                         if (empty($toplevel_parent)) {
1042                                 return 0;
1043                         }
1044
1045                         $parent_id             = $toplevel_parent['id'];
1046                         $item['parent-uri']    = $toplevel_parent['uri'];
1047                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
1048                         $item['deleted']       = $toplevel_parent['deleted'];
1049                         $item['wall']          = $toplevel_parent['wall'];
1050
1051                         // Reshares have to keep their permissions to allow groups to work
1052                         if (!$defined_permissions && (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE))) {
1053                                 // Don't store the permissions on pure AP posts
1054                                 $store_permissions = ($item['network'] != Protocol::ACTIVITYPUB) || $item['origin'] || !empty($item['diaspora_signed_text']);
1055                                 $item['allow_cid'] = $store_permissions ? $toplevel_parent['allow_cid'] : '';
1056                                 $item['allow_gid'] = $store_permissions ? $toplevel_parent['allow_gid'] : '';
1057                                 $item['deny_cid']  = $store_permissions ? $toplevel_parent['deny_cid'] : '';
1058                                 $item['deny_gid']  = $store_permissions ? $toplevel_parent['deny_gid'] : '';
1059                         }
1060
1061                         $parent_origin         = $toplevel_parent['origin'];
1062
1063                         // Don't federate received participation messages
1064                         if ($item['verb'] != Activity::FOLLOW) {
1065                                 $item['wall'] = $toplevel_parent['wall'];
1066                         } else {
1067                                 $item['wall'] = false;
1068                                 // Participations are technical messages, so they are set to "seen" automatically
1069                                 $item['unseen'] = false;
1070                         }
1071
1072                         /*
1073                          * If the parent is private, force privacy for the entire conversation
1074                          * This differs from the above settings as it subtly allows comments from
1075                          * email correspondents to be private even if the overall thread is not.
1076                          */
1077                         if (!$defined_permissions && $toplevel_parent['private']) {
1078                                 $item['private'] = $toplevel_parent['private'];
1079                         }
1080
1081                         // If its a post that originated here then tag the thread as "mention"
1082                         if ($item['origin'] && $item['uid']) {
1083                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1084                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1085                         }
1086
1087                         // Update the contact relations
1088                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1089                 } else {
1090                         $parent_id = 0;
1091                         $parent_origin = $item['origin'];
1092
1093                         if ($item['wall'] && empty($item['conversation'])) {
1094                                 $item['conversation'] = $item['parent-uri'] . '#context';
1095                         }
1096                 }
1097
1098                 if ($item['origin']) {
1099                         if (
1100                                 Photo::setPermissionFromBody($item['body'], $item['uid'], $item['contact-id'], $item['allow_cid'], $item['allow_gid'], $item['deny_cid'], $item['deny_gid'])
1101                                 && ($item['object-type'] != Activity\ObjectType::EVENT)
1102                         ) {
1103                                 $item['object-type'] = Activity\ObjectType::IMAGE;
1104                         }
1105
1106                         $item = DI::contentItem()->moveAttachmentsFromBodyToAttach($item);
1107                 }
1108
1109                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1110                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1111
1112                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1113                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1114                 }
1115
1116                 // Is this item available in the global items (with uid=0)?
1117                 if ($item['uid'] == 0) {
1118                         $item['global'] = true;
1119
1120                         // Set the global flag on all items if this was a global item entry
1121                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1122                 } else {
1123                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1124                 }
1125
1126                 // ACL settings
1127                 if (!$defined_permissions && !empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1128                         $item['private'] = self::PRIVATE;
1129                 }
1130
1131                 if ($notify && $post_local) {
1132                         $item['edit'] = false;
1133                         $item['parent'] = $parent_id;
1134
1135                         // Trigger automatic reactions for addons
1136                         if (!isset($item['api_source'])) {
1137                                 $item['api_source'] = true;
1138                         }
1139
1140                         // We have to tell the hooks who we are - this really should be improved
1141                         if (!DI::userSession()->getLocalUserId()) {
1142                                 $_SESSION['authenticated'] = true;
1143                                 $_SESSION['uid'] = $uid;
1144                                 $dummy_session = true;
1145                         } else {
1146                                 $dummy_session = false;
1147                         }
1148
1149                         Hook::callAll('post_local', $item);
1150
1151                         if ($dummy_session) {
1152                                 unset($_SESSION['authenticated']);
1153                                 unset($_SESSION['uid']);
1154                         }
1155                 } elseif (!$notify) {
1156                         Hook::callAll('post_remote', $item);
1157                 }
1158
1159                 if (!empty($item['cancel'])) {
1160                         Logger::notice('post cancelled by addon.');
1161                         return 0;
1162                 }
1163
1164                 if (empty($item['vid']) && !empty($item['verb'])) {
1165                         $item['vid'] = Verb::getID($item['verb']);
1166                 }
1167
1168                 // Creates or assigns the permission set
1169                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1170                         DI::permissionSetFactory()->createFromString(
1171                                 $item['uid'],
1172                                 $item['allow_cid'],
1173                                 $item['allow_gid'],
1174                                 $item['deny_cid'],
1175                                 $item['deny_gid']
1176                         )
1177                 )->id;
1178
1179                 if (!empty($item['extid'])) {
1180                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1181                 }
1182
1183                 if ($item['verb'] == Activity::ANNOUNCE) {
1184                         self::setOwnerforResharedItem($item);
1185                 }
1186
1187                 if (isset($item['attachments'])) {
1188                         foreach ($item['attachments'] as $attachment) {
1189                                 $attachment['uri-id'] = $item['uri-id'];
1190                                 Post\Media::insert($attachment);
1191                         }
1192                         unset($item['attachments']);
1193                 }
1194
1195                 if (empty($item['quote-uri-id'])) {
1196                         $quote_id = self::getQuoteUriId($item['body']);
1197                         if (!empty($quote_id)) {
1198                                 // This is one of these "should not happen" situations.
1199                                 // The protocol implementations should already have done this job.
1200                                 Logger::notice('Quote-uri-id detected in post', ['id' => $quote_id, 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1201                                 $item['quote-uri-id'] = $quote_id;
1202                         }
1203                 }
1204
1205                 if (!empty($item['quote-uri-id']) && ($item['quote-uri-id'] == $item['uri-id'])) {
1206                         Logger::info('Quote-Uri-Id is identical to Uri-Id', ['uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1207                         unset($item['quote-uri-id']);
1208                 }
1209
1210                 if (!empty($item['quote-uri-id'])) {
1211                         $item['raw-body'] = BBCode::removeSharedData($item['raw-body']);
1212                         $item['body']     = BBCode::removeSharedData($item['body']);
1213                 }
1214
1215                 // Remove all media attachments from the body and store them in the post-media table
1216                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1217                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1218
1219                 $author = Contact::getById($item['author-id'], ['network']);
1220                 Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body'], $item['body'], $author['network'] ?? '');
1221
1222                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1223                 $item['body']     = BBCode::removeAttachment($item['body']);
1224                 $item['raw-body'] = BBCode::removeAttachment($item['raw-body']);
1225
1226                 // Check for hashtags in the body and repair or add hashtag links
1227                 $item['body'] = self::setHashtags($item['body']);
1228
1229                 $notify_type = Delivery::POST;
1230
1231                 // Filling item related side tables
1232                 if (!empty($item['attach'])) {
1233                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1234                 }
1235
1236                 if (empty($item['event-id'])) {
1237                         unset($item['event-id']);
1238
1239                         $ev = Event::fromBBCode($item['body']);
1240                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1241                                 Logger::info('Event found.');
1242                                 $ev['cid']       = $item['contact-id'];
1243                                 $ev['uid']       = $item['uid'];
1244                                 $ev['uri']       = $item['uri'];
1245                                 $ev['edited']    = $item['edited'];
1246                                 $ev['private']   = $item['private'];
1247                                 $ev['guid']      = $item['guid'];
1248                                 $ev['plink']     = $item['plink'];
1249                                 $ev['network']   = $item['network'];
1250                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1251                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1252                                 $ev['source']    = $item['source'] ?? '';
1253
1254                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1255                                 if (DBA::isResult($event)) {
1256                                         $ev['id'] = $event['id'];
1257                                 }
1258
1259                                 $event_id = Event::store($ev);
1260                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1261
1262                                 Logger::info('Event was stored', ['id' => $event_id]);
1263                         }
1264                 }
1265
1266                 if (empty($item['causer-id'])) {
1267                         unset($item['causer-id']);
1268                 }
1269
1270                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1271                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1272                         if (!empty($content_warning) && empty($item['content-warning'])) {
1273                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1274                         }
1275                 }
1276
1277                 $item['language'] = self::getLanguage($item);
1278
1279                 $inserted = Post::insert($item['uri-id'], $item);
1280
1281                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1282                         Post\Thread::insert($item['uri-id'], $item);
1283                 }
1284
1285                 // The content of activities normally doesn't matter - except for likes from Misskey
1286                 if (!in_array($item['verb'], self::ACTIVITIES) || in_array($item['verb'], [Activity::LIKE, Activity::DISLIKE]) && !empty($item['body']) && (mb_strlen($item['body']) == 1)) {
1287                         Post\Content::insert($item['uri-id'], $item);
1288                 }
1289
1290                 $item['parent'] = $parent_id;
1291
1292                 // Create Diaspora signature
1293                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != self::GRAVITY_PARENT)) {
1294                         $signed = Diaspora::createCommentSignature($item);
1295                         if (!empty($signed)) {
1296                                 $item['diaspora_signed_text'] = json_encode($signed);
1297                         }
1298                 }
1299
1300                 if (!empty($item['diaspora_signed_text'])) {
1301                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1302                 }
1303
1304                 // Attached file links
1305                 if (!empty($item['file'])) {
1306                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1307                 }
1308
1309                 // Delivery relevant data
1310                 $delivery_data = Post\DeliveryData::extractFields($item);
1311
1312                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1313                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1314                 }
1315
1316                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1317                 if (!Tag::existsForPost($item['uri-id'])) {
1318                         Tag::storeFromBody($item['uri-id'], $item['body']);
1319                 }
1320
1321                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1322                 if (Post::exists($condition)) {
1323                         Logger::notice('Item is already inserted - aborting', $condition);
1324                         return 0;
1325                 }
1326
1327                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1328                 if (!$post_user_id) {
1329                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1330                         return 0;
1331                 }
1332
1333                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1334                         $item['post-user-id'] = $post_user_id;
1335                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1336                 }
1337
1338                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1339
1340                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1341                 if (!DBA::isResult($posted_item)) {
1342                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1343                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1344                         self::spool($orig_item);
1345                         return 0;
1346                 }
1347
1348                 // update the commented timestamp on the parent
1349                 if (DI::config()->get('system', 'like_no_comment')) {
1350                         // Update when it is a comment
1351                         $update_commented = in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]);
1352                 } else {
1353                         // Update when it isn't a follow or tag verb
1354                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1355                 }
1356
1357                 if ($update_commented) {
1358                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1359                 } else {
1360                         $fields = ['changed' => DateTimeFormat::utcNow()];
1361                 }
1362
1363                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1364
1365                 // In that function we check if this is a group post. Additionally we delete the item under certain circumstances
1366                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1367                         // Get the user information for the logging
1368                         $user = User::getById($uid);
1369
1370                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1371                         return 0;
1372                 }
1373
1374                 if ($notify) {
1375                         DI::contentItem()->postProcessPost($posted_item);
1376                         if ($copy_permissions && ($posted_item['thr-parent-id'] != $posted_item['uri-id']) && ($posted_item['private'] == self::PRIVATE)) {
1377                                 DI::contentItem()->copyPermissions($posted_item['thr-parent-id'], $posted_item['uri-id'], $posted_item['parent-uri-id']);
1378                         }
1379                 } else {
1380                         Hook::callAll('post_remote_end', $posted_item);
1381                 }
1382
1383                 if ($posted_item['gravity'] === self::GRAVITY_PARENT) {
1384                         self::addShadow($post_user_id);
1385                 } else {
1386                         self::addShadowPost($post_user_id);
1387                 }
1388
1389                 self::updateContact($posted_item);
1390
1391                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1392
1393                 // Distribute items to users who subscribed to their tags
1394                 self::distributeByTags($posted_item);
1395
1396                 // Automatically reshare the item if the "remote_self" option is selected
1397                 self::autoReshare($posted_item);
1398
1399                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1400
1401                 if ($transmit) {
1402                         if ($posted_item['uid'] && Contact\User::isBlocked($posted_item['author-id'], $posted_item['uid'])) {
1403                                 Logger::info('Message from blocked author will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['author-id']]);
1404                                 $transmit = false;
1405                         }
1406                         if ($transmit && $posted_item['uid'] && Contact\User::isBlocked($posted_item['owner-id'], $posted_item['uid'])) {
1407                                 Logger::info('Message from blocked owner will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['owner-id']]);
1408                                 $transmit = false;
1409                         }
1410                         if ($transmit && !empty($posted_item['causer-id']) && $posted_item['uid'] && Contact\User::isBlocked($posted_item['causer-id'], $posted_item['uid'])) {
1411                                 Logger::info('Message from blocked causer will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['causer-id']]);
1412                                 $transmit = false;
1413                         }
1414
1415                         // Don't relay participation messages
1416                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1417                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))
1418                         ) {
1419                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1420                                 $transmit = false;
1421                         }
1422                 }
1423
1424                 if (!empty($source) && ($transmit || DI::config()->get('debug', 'store_source'))) {
1425                         Post\Activity::insert($posted_item['uri-id'], $source);
1426                 }
1427
1428                 if ($transmit) {
1429                         ActivityPub\Transmitter::storeReceiversForItem($posted_item);
1430
1431                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1432                 }
1433
1434                 if ($inserted) {
1435                         // Fill the cache with the rendered content.
1436                         if (in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT])) {
1437                                 self::updateDisplayCache($posted_item['uri-id']);
1438                         }
1439
1440                         if (in_array($posted_item['gravity'], [self::GRAVITY_ACTIVITY, self::GRAVITY_COMMENT])) {
1441                                 Post\Counts::update($posted_item['thr-parent-id'], $posted_item['parent-uri-id'], $posted_item['vid'], $posted_item['verb'], $posted_item['body']);
1442                         }
1443                         Post\Engagement::storeFromItem($posted_item);
1444                 }
1445
1446                 return $post_user_id;
1447         }
1448
1449         /**
1450          * Fetch the post reason for a given item array
1451          *
1452          * @param array $item
1453          *
1454          * @return integer
1455          */
1456         public static function getPostReason(array $item): int
1457         {
1458                 $actor = ($item['gravity'] == self::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1459                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1460                         return self::PR_FOLLOWER;
1461                 }
1462
1463                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1464                         return self::PR_LOCAL;
1465                 }
1466
1467                 return $item['post-reason'] ?? self::PR_NONE;
1468         }
1469
1470         /**
1471          * Update the display cache
1472          *
1473          * @param integer $uri_id
1474          * @return void
1475          * @throws InternalServerErrorException
1476          * @throws \ImagickException
1477          */
1478         public static function updateDisplayCache(int $uri_id)
1479         {
1480                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1481                 if (!$item) {
1482                         return;
1483                 }
1484
1485                 self::prepareBody($item, false, false, true);
1486         }
1487
1488         /**
1489          * Change the owner of a parent item if it had been shared by a group
1490          *
1491          * (public) group posts in the new format consist of the regular post by the author
1492          * followed by an announce message sent from the group account.
1493          * Changing the owner helps in grouping group posts.
1494          *
1495          * @param array $item
1496          * @return void
1497          */
1498         private static function setOwnerforResharedItem(array $item)
1499         {
1500                 if ($item['uid'] == 0) {
1501                         return;
1502                 }
1503
1504                 $parent = Post::selectFirst(
1505                         ['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1506                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]
1507                 );
1508                 if (!DBA::isResult($parent)) {
1509                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1510                         return;
1511                 }
1512
1513                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1514                 if (!DBA::isResult($author)) {
1515                         Logger::error('Author not found', ['id' => $item['author-id']]);
1516                         return;
1517                 }
1518
1519                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1520                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1521
1522                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1523                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1524                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1525                         return;
1526                 }
1527
1528                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1529                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1530                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1531                                 return;
1532                         }
1533
1534                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1535                                 Logger::info('The resharer is no group: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1536                                 return;
1537                         }
1538                 }
1539
1540                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1541                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1542         }
1543
1544         /**
1545          * Distribute the given item to users who subscribed to their tags
1546          *
1547          * @param array $item     Processed item
1548          */
1549         private static function distributeByTags(array $item)
1550         {
1551                 if (($item['uid'] != 0) || ($item['gravity'] != self::GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1552                         return;
1553                 }
1554
1555                 $languages = $item['language'] ? array_keys(json_decode($item['language'], true)) : [];
1556
1557                 foreach (Tag::getUIDListByURIId($item['uri-id']) as $uid => $tags) {
1558                         if (!empty($languages)) {
1559                                 $keep = false;
1560                                 $user_languages = User::getWantedLanguages($uid);
1561                                 foreach ($user_languages as $language) {
1562                                         if (in_array($language, $languages)) {
1563                                                 $keep = true;
1564                                         }
1565                                 }
1566                                 if ($keep) {
1567                                         Logger::debug('Wanted languages found', ['uid' => $uid, 'user-languages' => $user_languages, 'item-languages' => $languages]);
1568                                 } else {
1569                                         Logger::debug('No wanted languages found', ['uid' => $uid, 'user-languages' => $user_languages, 'item-languages' => $languages]);
1570                                         continue;
1571                                 }
1572                         }
1573
1574                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1575                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1576                         foreach ($tags as $tag) {
1577                                 $stored = Category::storeFileByURIId($item['uri-id'], $uid, Category::SUBCRIPTION, $tag);
1578                                 Logger::debug('Stored tag subscription for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, $tag, 'stored' => $stored]);
1579                         }
1580                 }
1581         }
1582
1583         /**
1584          * Distributes public items to the receivers
1585          *
1586          * @param integer $itemid      Item ID that should be added
1587          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1588          * @throws \Exception
1589          */
1590         public static function distribute(int $itemid, string $signed_text = '')
1591         {
1592                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1593                 $parent = Post::selectFirst(['owner-id'], $condition);
1594                 if (!DBA::isResult($parent)) {
1595                         Logger::warning('Item not found', ['condition' => $condition]);
1596                         return;
1597                 }
1598
1599                 // Only distribute public items from native networks
1600                 $condition = [
1601                         'id' => $itemid, 'uid' => 0,
1602                         'network' => array_merge(Protocol::FEDERATED, ['']),
1603                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]
1604                 ];
1605                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1606                 if (!DBA::isResult($item)) {
1607                         Logger::warning('Item not found', ['condition' => $condition]);
1608                         return;
1609                 }
1610
1611                 $origin = $item['origin'];
1612
1613                 $users = [];
1614
1615                 /// @todo add a field "pcid" in the contact table that refers to the public contact id.
1616                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1617                 if (!DBA::isResult($owner)) {
1618                         return;
1619                 }
1620
1621                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1622                 $contacts = DBA::select('contact', ['uid'], $condition);
1623                 while ($contact = DBA::fetch($contacts)) {
1624                         if ($contact['uid'] == 0) {
1625                                 continue;
1626                         }
1627
1628                         $users[$contact['uid']] = $contact['uid'];
1629                 }
1630                 DBA::close($contacts);
1631
1632                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1633                 $contacts = DBA::select('contact', ['uid'], $condition);
1634                 while ($contact = DBA::fetch($contacts)) {
1635                         if ($contact['uid'] == 0) {
1636                                 continue;
1637                         }
1638
1639                         $users[$contact['uid']] = $contact['uid'];
1640                 }
1641                 DBA::close($contacts);
1642
1643                 if (!empty($owner['alias'])) {
1644                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1645                         $contacts = DBA::select('contact', ['uid'], $condition);
1646                         while ($contact = DBA::fetch($contacts)) {
1647                                 if ($contact['uid'] == 0) {
1648                                         continue;
1649                                 }
1650
1651                                 $users[$contact['uid']] = $contact['uid'];
1652                         }
1653                         DBA::close($contacts);
1654                 }
1655
1656                 $origin_uid = 0;
1657
1658                 if ($item['uri-id'] != $item['parent-uri-id']) {
1659                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1660                         while ($parent = Post::fetch($parents)) {
1661                                 $users[$parent['uid']] = $parent['uid'];
1662                                 if ($parent['origin'] && !$origin) {
1663                                         $origin_uid = $parent['uid'];
1664                                 }
1665                         }
1666                         DBA::close($parents);
1667                 }
1668
1669                 foreach ($users as $uid) {
1670                         if ($origin_uid == $uid) {
1671                                 $item['diaspora_signed_text'] = $signed_text;
1672                         }
1673                         $item['post-reason'] = self::PR_DISTRIBUTE;
1674                         self::storeForUser($item, $uid);
1675                 }
1676         }
1677
1678         /**
1679          * Store a public item defined by their URI-ID for the given users
1680          *
1681          * @param integer $uri_id     URI-ID of the given item
1682          * @param integer $uid        The user that will receive the item entry
1683          * @param array   $fields     Additional fields to be stored
1684          * @param integer $source_uid User id of the source post
1685          * @return integer stored item id
1686          */
1687         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1688         {
1689                 if ($uid == $source_uid) {
1690                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1691                         return 0;
1692                 }
1693
1694                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1695                 if (!DBA::isResult($item)) {
1696                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1697                         return 0;
1698                 }
1699
1700                 if (($uid != 0) && ($item['gravity'] == self::GRAVITY_PARENT)) {
1701                         $owner = User::getOwnerDataById($uid);
1702                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1703                                 Logger::info('Target user is a group but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1704                                 return 0;
1705                         }
1706                 }
1707
1708                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1709                         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']]);
1710                         return 0;
1711                 }
1712
1713                 $item['post-reason'] = self::PR_STORED;
1714
1715                 $item = array_merge($item, $fields);
1716
1717                 if (($uid != 0) && Contact::isSharing(($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'], $uid)) {
1718                         $item['post-reason'] = self::PR_FOLLOWER;
1719                 }
1720
1721                 $is_reshare = ($item['gravity'] == self::GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1722
1723                 if (($uid != 0) && (($item['gravity'] == self::GRAVITY_PARENT) || $is_reshare) &&
1724                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1725                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC, self::PR_ACTIVITY, self::PR_AUDIENCE])
1726                 ) {
1727                         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']]);
1728                         return 0;
1729                 }
1730
1731                 $causer = $item['causer-id'] ?: $item['author-id'];
1732
1733                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == self::GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1734                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1735                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1736                                 return 0;
1737                         }
1738                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1739                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1740                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1741                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1742                                 return 0;
1743                         }
1744                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1745                 }
1746
1747                 $stored = self::storeForUser($item, $uid);
1748                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1749                 return $stored;
1750         }
1751
1752         /**
1753          * Fetch the parent with the given uri-id
1754          *
1755          * @param integer $uri_id
1756          * @param integer $uid
1757          * @param integer $causer
1758          *
1759          * @return integer
1760          */
1761         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1762         {
1763                 // Fetch the origin user for the post
1764                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1765                 if (is_null($origin_uid)) {
1766                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1767                         return 0;
1768                 }
1769
1770                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1771         }
1772
1773         /**
1774          * Returns the origin uid of a post if the given user is allowed to see it.
1775          *
1776          * @param int $uriid
1777          * @param int $uid
1778          * @return int
1779          */
1780         private static function GetOriginUidForUriId(int $uriid, int $uid)
1781         {
1782                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1783                         return $uid;
1784                 }
1785
1786                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1787                 if (!empty($post)) {
1788                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1789                                 return $post['uid'];
1790                         }
1791
1792                         $pcid = Contact::getPublicIdByUserId($uid);
1793                         if (empty($pcid)) {
1794                                 return null;
1795                         }
1796
1797                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1798                                 if ($receiver == $pcid) {
1799                                         return $post['uid'];
1800                                 }
1801                         }
1802
1803                         return null;
1804                 }
1805
1806                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1807                         return 0;
1808                 }
1809
1810                 // When the post belongs to a a group then all group users are allowed to access it
1811                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1812                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1813                                 $target_uid = User::getIdForURL($tag['url']);
1814                                 if (!empty($target_uid)) {
1815                                         return $target_uid;
1816                                 }
1817                         }
1818                 }
1819
1820                 return null;
1821         }
1822
1823         /**
1824          * Store a public item array for the given users
1825          *
1826          * @param array   $item   The item entry that will be stored
1827          * @param integer $uid    The user that will receive the item entry
1828          * @return integer stored item id
1829          * @throws \Exception
1830          */
1831         private static function storeForUser(array $item, int $uid): int
1832         {
1833                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1834                 if (!empty($post['id'])) {
1835                         if (!empty($item['event-id'])) {
1836                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1837                                 if (!empty($event_post['event-id'])) {
1838                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish'], ['id' => $item['event-id']]);
1839                                         if (!empty($event)) {
1840                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1841                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1842                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1843                                         }
1844                                 }
1845                         }
1846                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1847                         return $post['id'];
1848                 }
1849
1850                 // Data from the "post-user" table
1851                 unset($item['id']);
1852                 unset($item['mention']);
1853                 unset($item['starred']);
1854                 unset($item['unseen']);
1855                 unset($item['psid']);
1856                 unset($item['pinned']);
1857                 unset($item['ignored']);
1858                 unset($item['pubmail']);
1859                 unset($item['event-id']);
1860                 unset($item['hidden']);
1861                 unset($item['notification-type']);
1862
1863                 // Data from the "post-delivery-data" table
1864                 unset($item['postopts']);
1865                 unset($item['inform']);
1866
1867                 $item['uid'] = $uid;
1868                 $item['origin'] = 0;
1869                 $item['wall'] = 0;
1870
1871                 $notify = false;
1872                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1873                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1874                         if (DBA::isResult($contact)) {
1875                                 $notify = self::isRemoteSelf($contact, $item);
1876                                 $item['wall'] = (bool)$notify;
1877                         }
1878                 }
1879
1880                 $item['contact-id'] = self::contactId($item);
1881                 $distributed = self::insert($item, $notify);
1882
1883                 if (!$distributed) {
1884                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1885                 } else {
1886                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1887                 }
1888                 return $distributed;
1889         }
1890
1891         /**
1892          * Add a shadow entry for a given item id that is a thread starter
1893          *
1894          * We store every public item entry additionally with the user id "0".
1895          * This is used for the community page and for the search.
1896          * It is planned that in the future we will store public item entries only once.
1897          *
1898          * @param integer $itemid Item ID that should be added
1899          * @throws \Exception
1900          */
1901         private static function addShadow(int $itemid)
1902         {
1903                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1904                 $condition = ['id' => $itemid, 'gravity' => self::GRAVITY_PARENT];
1905                 $item = Post::selectFirst($fields, $condition);
1906
1907                 if (!DBA::isResult($item)) {
1908                         return;
1909                 }
1910
1911                 // is it already a copy?
1912                 if (($itemid == 0) || ($item['uid'] == 0)) {
1913                         return;
1914                 }
1915
1916                 // Is it a visible public post?
1917                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1918                         return;
1919                 }
1920
1921                 // is it an entry from a connector? Only add an entry for natively connected networks
1922                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED, ['']))) {
1923                         return;
1924                 }
1925
1926                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1927                         return;
1928                 }
1929
1930                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1931
1932                 if (DBA::isResult($item)) {
1933                         // Preparing public shadow (removing user specific data)
1934                         $item['uid'] = 0;
1935                         unset($item['id']);
1936                         unset($item['parent']);
1937                         unset($item['wall']);
1938                         unset($item['mention']);
1939                         unset($item['origin']);
1940                         unset($item['starred']);
1941                         unset($item['postopts']);
1942                         unset($item['inform']);
1943                         unset($item['post-reason']);
1944                         if ($item['uri-id'] == $item['parent-uri-id']) {
1945                                 $item['contact-id'] = $item['owner-id'];
1946                         } else {
1947                                 $item['contact-id'] = $item['author-id'];
1948                         }
1949
1950                         $public_shadow = self::insert($item);
1951
1952                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1953                 }
1954         }
1955
1956         /**
1957          * Add a shadow entry for a given item id that is a comment
1958          *
1959          * This function does the same like the function above - but for comments
1960          *
1961          * @param integer $itemid Item ID that should be added
1962          * @throws \Exception
1963          */
1964         private static function addShadowPost(int $itemid)
1965         {
1966                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1967                 if (!DBA::isResult($item)) {
1968                         return;
1969                 }
1970
1971                 // Is it a toplevel post?
1972                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1973                         self::addShadow($itemid);
1974                         return;
1975                 }
1976
1977                 // Is this a shadow entry?
1978                 if ($item['uid'] == 0) {
1979                         return;
1980                 }
1981
1982                 // Is there a shadow parent?
1983                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1984                         return;
1985                 }
1986
1987                 // Is there already a shadow entry?
1988                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1989                         return;
1990                 }
1991
1992                 // Save "origin" and "parent" state
1993                 $origin = $item['origin'];
1994                 $parent = $item['parent'];
1995
1996                 // Preparing public shadow (removing user specific data)
1997                 $item['uid'] = 0;
1998                 unset($item['id']);
1999                 unset($item['parent']);
2000                 unset($item['wall']);
2001                 unset($item['mention']);
2002                 unset($item['origin']);
2003                 unset($item['starred']);
2004                 unset($item['postopts']);
2005                 unset($item['inform']);
2006                 unset($item['post-reason']);
2007                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2008
2009                 $public_shadow = self::insert($item);
2010
2011                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
2012
2013                 // If this was a comment to a Diaspora post we don't get our comment back.
2014                 // This means that we have to distribute the comment by ourselves.
2015                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2016                         self::distribute($public_shadow);
2017                 }
2018         }
2019
2020         /**
2021          * Adds a language specification in a "language" element of given $arr.
2022          * Expects "body" element to exist in $arr.
2023          *
2024          * @param array $item
2025          * @return string detected language
2026          * @throws \Text_LanguageDetect_Exception
2027          */
2028         private static function getLanguage(array $item): ?string
2029         {
2030                 if (!empty($item['language'])) {
2031                         return $item['language'];
2032                 }
2033
2034                 $transmitted = [];
2035                 foreach ($item['transmitted-languages'] ??  [] as $language) {
2036                         $transmitted[$language] = 0;
2037                 }
2038
2039                 $content = trim(($item['title'] ?? '') . ' ' . ($item['content-warning'] ?? '') . ' ' . ($item['body'] ?? ''));
2040
2041                 if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($content)) {
2042                         return !empty($transmitted) ? json_encode($transmitted) : null;
2043                 }
2044
2045                 $languages = self::getLanguageArray($content, 3, $item['uri-id'], $item['author-id']);
2046                 if (empty($languages)) {
2047                         return !empty($transmitted) ? json_encode($transmitted) : null;
2048                 }
2049
2050                 if (!empty($transmitted)) {
2051                         $languages = array_merge($transmitted, $languages);
2052                         arsort($languages);
2053                 }
2054
2055                 return json_encode($languages);
2056         }
2057
2058         /**
2059          * Get a language array from a given text
2060          *
2061          * @param string  $body
2062          * @param integer $count
2063          * @param integer $uri_id
2064          * @param integer $author_id
2065          * @return array
2066          */
2067         public static function getLanguageArray(string $body, int $count, int $uri_id = 0, int $author_id = 0): array
2068         {
2069                 $searchtext = BBCode::toSearchText($body, $uri_id);
2070
2071                 if ((count(explode(' ', $searchtext)) < 10) && (mb_strlen($searchtext) < 30) && $author_id) {
2072                         $author = Contact::selectFirst(['about'], ['id' => $author_id]);
2073                         if (!empty($author['about'])) {
2074                                 $about = BBCode::toSearchText($author['about'], 0);
2075                                 Logger::debug('About field added', ['author' => $author_id, 'body' => $searchtext, 'about' => $about]);
2076                                 $searchtext .= ' ' . $about;
2077                         }
2078                 }
2079
2080                 if (empty($searchtext)) {
2081                         return [];
2082                 }
2083
2084                 $ld = new Language(DI::l10n()->getDetectableLanguages());
2085
2086                 $result = [];
2087
2088                 foreach (self::splitByBlocks($searchtext) as $block) {
2089                         $languages = $ld->detect($block)->close() ?: [];
2090
2091                         $data = [
2092                                 'text'      => $block,
2093                                 'detected'  => $languages,
2094                                 'uri-id'    => $uri_id,
2095                                 'author-id' => $author_id,
2096                         ];
2097                         Hook::callAll('detect_languages', $data);
2098
2099                         foreach ($data['detected'] as $language => $quality) {
2100                                 $result[$language] = max($result[$language] ?? 0, $quality * (strlen($block) / strlen($searchtext)));
2101                         }
2102                 }
2103
2104                 $result = self::compactLanguages($result);
2105
2106                 arsort($result);
2107                 return array_slice($result, 0, $count);
2108         }
2109
2110         /**
2111          * Concert the language code in the detection result to ISO 639-1.
2112          * On duplicates the system uses the higher quality value.
2113          *
2114          * @param array $result
2115          * @return array
2116          */
2117         private static function compactLanguages(array $result): array
2118         {
2119                 $languages = [];
2120                 foreach ($result as $language => $quality) {
2121                         if ($quality == 0) {
2122                                 continue;
2123                         }
2124                         $code = DI::l10n()->toISO6391($language);
2125                         if (empty($languages[$code]) || ($languages[$code] < $quality)) {
2126                                 $languages[$code] = $quality;
2127                         }
2128                 }
2129                 return $languages;
2130         }
2131
2132         /**
2133          * Split a string into different unicode blocks
2134          * Currently the text is split into the latin and the non latin part.
2135          *
2136          * @param string $body
2137          * @return array
2138          */
2139         private static function splitByBlocks(string $body): array
2140         {
2141                 if (!class_exists('IntlChar')) {
2142                         return [$body];
2143                 }
2144
2145                 $blocks         = [];
2146                 $previous_block = 0;
2147
2148                 for ($i = 0; $i < mb_strlen($body); $i++) {
2149                         $character = mb_substr($body, $i, 1);
2150                         $previous  = ($i > 0) ? mb_substr($body, $i - 1, 1) : '';
2151                         $next      = ($i < mb_strlen($body)) ? mb_substr($body, $i + 1, 1) : '';
2152
2153                         if (!\IntlChar::isalpha($character)) {
2154                                 if (($previous != '') && (\IntlChar::isalpha($previous))) {
2155                                         $previous_block = self::getBlockCode($previous);
2156                                 }
2157
2158                                 $block = (($next != '') && \IntlChar::isalpha($next)) ? self::getBlockCode($next) : $previous_block;
2159                                 $blocks[$block] = ($blocks[$block] ?? '') . $character;
2160                         } else {
2161                                 $block = self::getBlockCode($character);
2162                                 $blocks[$block] = ($blocks[$block] ?? '') . $character;
2163                         }
2164                 }
2165
2166                 foreach (array_keys($blocks) as $key) {
2167                         $blocks[$key] = trim($blocks[$key]);
2168                         if (empty($blocks[$key])) {
2169                                 unset($blocks[$key]);
2170                         }
2171                 }
2172
2173                 return array_values($blocks);
2174         }
2175
2176         /**
2177          * returns the block code for the given character
2178          *
2179          * @param string $character
2180          * @return integer 0 = no alpha character (blank, signs, emojis, ...), 1 = latin character, 2 = character in every other language
2181          */
2182         private static function getBlockCode(string $character): int
2183         {
2184                 if (!\IntlChar::isalpha($character)) {
2185                         return 0;
2186                 }
2187                 return self::isLatin($character) ? 1 : 2;
2188         }
2189
2190         /**
2191          * Checks if the given character is in one of the latin code blocks
2192          *
2193          * @param string $character
2194          * @return boolean
2195          */
2196         private static function isLatin(string $character): bool
2197         {
2198                 return in_array(\IntlChar::getBlockCode($character), [
2199                         \IntlChar::BLOCK_CODE_BASIC_LATIN, \IntlChar::BLOCK_CODE_LATIN_1_SUPPLEMENT,
2200                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_A, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_B,
2201                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_C, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_D,
2202                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_E, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_ADDITIONAL
2203                 ]);
2204         }
2205
2206         public static function getLanguageMessage(array $item): string
2207         {
2208                 $iso639 = new \Matriphe\ISO639\ISO639;
2209
2210                 $used_languages = '';
2211                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2212                         $code = DI::l10n()->toISO6391($language);
2213
2214                         $native   = $iso639->nativeByCode1($code);
2215                         $language = $iso639->languageByCode1($code);
2216                         if ($native != $language) {
2217                                 $used_languages .= DI::l10n()->t('%s (%s - %s): %s', $native, $language, $code, number_format($reliability, 5)) . '\n';
2218                         } else {
2219                                 $used_languages .= DI::l10n()->t('%s (%s): %s', $native, $code, number_format($reliability, 5)) . '\n';
2220                         }
2221                 }
2222                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2223                 return $used_languages;
2224         }
2225
2226         /**
2227          * Creates an unique guid out of a given uri.
2228          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
2229          * Posts that are created on this system are using System::createUUID.
2230          * Received ActivityPub posts are using Processor::getGUIDByURL.
2231          *
2232          * @param string      $uri  uri of an item entry
2233          * @param string|null $host hostname for the GUID prefix
2234          * @return string Unique guid
2235          * @throws \Exception
2236          */
2237         public static function guidFromUri(string $uri, string $host = null): string
2238         {
2239                 // Our regular guid routine is using this kind of prefix as well
2240                 // We have to avoid that different routines could accidentally create the same value
2241                 $parsed = parse_url($uri);
2242
2243                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2244                 unset($parsed['scheme']);
2245
2246                 $hostPart = $host ?: $parsed['host'] ?? '';
2247                 if (!$hostPart) {
2248                         Logger::warning('Empty host GUID part', ['uri' => $uri, 'host' => $host, 'parsed' => $parsed]);
2249                 }
2250
2251                 // Glue it together to be able to make a hash from it
2252                 if (!empty($parsed)) {
2253                         $host_id = implode('/', (array)$parsed);
2254                 } else {
2255                         $host_id = $uri;
2256                 }
2257
2258                 // Use a mixture of several hashes to provide some GUID like experience
2259                 return hash('crc32', $hostPart) . '-' . hash('joaat', $host_id) . '-' . hash('fnv164', $host_id);
2260         }
2261
2262         /**
2263          * generate an unique URI
2264          *
2265          * @param string $guid An existing GUID (Otherwise it will be generated)
2266          *
2267          * @return string
2268          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2269          */
2270         public static function newURI(string $guid = ''): string
2271         {
2272                 if ($guid == '') {
2273                         $guid = System::createUUID();
2274                 }
2275
2276                 return DI::baseUrl() . '/objects/' . $guid;
2277         }
2278
2279         /**
2280          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2281          *
2282          * This can be used to filter for inactive contacts.
2283          * Only do this for public postings to avoid privacy problems, since poco data is public.
2284          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2285          *
2286          * @param array $arr Contains the just posted item record
2287          * @throws \Exception
2288          */
2289         private static function updateContact(array $arr)
2290         {
2291                 // Unarchive the author
2292                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2293                 if (DBA::isResult($contact)) {
2294                         Contact::unmarkForArchival($contact);
2295                 }
2296
2297                 // Unarchive the contact if it's not our own contact
2298                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2299                 if (DBA::isResult($contact)) {
2300                         Contact::unmarkForArchival($contact);
2301                 }
2302
2303                 /// @todo On private posts we could obfuscate the date
2304                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2305
2306                 // Is it a group? Then we don't care about the rules from above
2307                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
2308                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2309                                 $update = true;
2310                         }
2311                 }
2312
2313                 if ($update) {
2314                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2315                         // So we have to ensure to only update the last item when it had been our own post,
2316                         // or it had been done by a "regular" contact.
2317                         if (!empty($arr['wall'])) {
2318                                 $condition = ['id' => $arr['contact-id']];
2319                         } else {
2320                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2321                         }
2322                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2323                 }
2324                 // Now do the same for the system wide contacts with uid=0
2325                 if ($arr['private'] != self::PRIVATE) {
2326                         Contact::update(
2327                                 ['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2328                                 ['id' => $arr['owner-id']]
2329                         );
2330
2331                         if ($arr['owner-id'] != $arr['author-id']) {
2332                                 Contact::update(
2333                                         ['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2334                                         ['id' => $arr['author-id']]
2335                                 );
2336                         }
2337                 }
2338         }
2339
2340         public static function setHashtags(string $body): string
2341         {
2342                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2343                         $tags = BBCode::getTags($body);
2344
2345                         // No hashtags?
2346                         if (!count($tags)) {
2347                                 return $body;
2348                         }
2349
2350                         // This sorting is important when there are hashtags that are part of other hashtags
2351                         // Otherwise there could be problems with hashtags like #test and #test2
2352                         // Because of this we are sorting from the longest to the shortest tag.
2353                         usort($tags, function ($a, $b) {
2354                                 return strlen($b) <=> strlen($a);
2355                         });
2356
2357                         $URLSearchString = "^\[\]";
2358
2359                         // All hashtags should point to the home server if "local_tags" is activated
2360                         if (DI::config()->get('system', 'local_tags')) {
2361                                 $body = preg_replace(
2362                                         "/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2363                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]",
2364                                         $body
2365                                 );
2366                         }
2367
2368                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2369                         $body = preg_replace_callback(
2370                                 "/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2371                                 function ($match) {
2372                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2373                                 },
2374                                 $body
2375                         );
2376
2377                         $body = preg_replace_callback(
2378                                 "/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2379                                 function ($match) {
2380                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2381                                 },
2382                                 $body
2383                         );
2384
2385                         $body = preg_replace_callback(
2386                                 "/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2387                                 function ($match) {
2388                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2389                                 },
2390                                 $body
2391                         );
2392
2393                         // Repair recursive urls
2394                         $body = preg_replace(
2395                                 "/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2396                                 "&num;$2",
2397                                 $body
2398                         );
2399
2400                         foreach ($tags as $tag) {
2401                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2402                                         continue;
2403                                 }
2404
2405                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2406                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2407
2408                                 $body = str_replace($tag, $newtag, $body);
2409                         }
2410
2411                         // Convert back the masked hashtags
2412                         $body = str_replace("&num;", "#", $body);
2413
2414                         return $body;
2415                 });
2416
2417                 return $body;
2418         }
2419
2420         /**
2421          * look for mention tags and setup a second delivery chain for group/community posts if appropriate
2422          *
2423          * @param int $uid
2424          * @param int $item_id
2425          * @return boolean true if item was deleted, else false
2426          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2427          * @throws \ImagickException
2428          */
2429         private static function tagDeliver(int $uid, int $item_id): bool
2430         {
2431                 $owner = User::getOwnerDataById($uid);
2432                 if (!DBA::isResult($owner)) {
2433                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2434                         return false;
2435                 }
2436
2437                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2438                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2439                         return false;
2440                 }
2441
2442                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [self::GRAVITY_PARENT, self::GRAVITY_COMMENT], 'origin' => false]);
2443                 if (!DBA::isResult($item)) {
2444                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2445                         return false;
2446                 }
2447
2448                 if ($item['gravity'] == self::GRAVITY_PARENT) {
2449                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2450                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2451                         } else {
2452                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2453                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2454                                 return true;
2455                         }
2456
2457                         $arr = ['item' => $item, 'user' => $owner];
2458
2459                         Hook::callAll('tagged', $arr);
2460                 } else {
2461                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2462                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2463                         } else {
2464                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2465                                 return false;
2466                         }
2467                 }
2468
2469                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2470
2471                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2472                         $allow_cid = '';
2473                         $allow_gid = '<' . Circle::FOLLOWERS . '>';
2474                         $deny_cid  = '';
2475                         $deny_gid  = '';
2476                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2477                 } else {
2478                         self::performActivity($item['id'], 'announce', $uid);
2479                 }
2480
2481                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2482                 return false;
2483         }
2484
2485         /**
2486          * Automatically reshare the item if the "remote_self" option is selected
2487          *
2488          * @param array $item
2489          * @return void
2490          */
2491         private static function autoReshare(array $item)
2492         {
2493                 if ($item['gravity'] != self::GRAVITY_PARENT) {
2494                         return;
2495                 }
2496
2497                 $cdata = Contact::getPublicAndUserContactID($item['author-id'], $item['uid']);
2498                 if (empty($cdata['user']) || ($cdata['user'] != $item['contact-id'])) {
2499                         return;
2500                 }
2501
2502                 if (!DBA::exists('contact', ['id' => $cdata['user'], 'remote_self' => LocalRelationship::MIRROR_NATIVE_RESHARE])) {
2503                         return;
2504                 }
2505
2506                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2507                         return;
2508                 }
2509
2510                 if (User::getById($item['uid'], ['blocked'])['blocked'] ?? false) {
2511                         return;
2512                 }
2513
2514                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2515
2516                 self::performActivity($item['id'], 'announce', $item['uid']);
2517         }
2518
2519         public static function isRemoteSelf(array $contact, array &$datarray): bool
2520         {
2521                 if ($contact['remote_self'] != LocalRelationship::MIRROR_OWN_POST) {
2522                         return false;
2523                 }
2524
2525                 // Prevent the forwarding of posts that are forwarded
2526                 if (!empty($datarray['extid']) && ($datarray['extid'] == Protocol::DFRN)) {
2527                         Logger::info('Already forwarded');
2528                         return false;
2529                 }
2530
2531                 // Prevent to forward already forwarded posts
2532                 if ($datarray['app'] == DI::baseUrl()->getHost()) {
2533                         Logger::info('Already forwarded (second test)');
2534                         return false;
2535                 }
2536
2537                 // Only forward posts
2538                 if ($datarray['verb'] != Activity::POST) {
2539                         Logger::info('No post');
2540                         return false;
2541                 }
2542
2543                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2544                         Logger::info('Not public');
2545                         return false;
2546                 }
2547
2548                 if (User::getById($contact['uid'], ['blocked'])['blocked'] ?? false) {
2549                         Logger::info('User is blocked', ['contact' => $contact]);
2550                         return false;
2551                 }
2552
2553                 $datarray2 = $datarray;
2554                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self' => $contact['remote_self'], 'item' => $datarray]);
2555
2556                 $self = DBA::selectFirst(
2557                         'contact',
2558                         ['id', 'name', 'url', 'thumb'],
2559                         ['uid' => $contact['uid'], 'self' => true]
2560                 );
2561                 if (!DBA::isResult($self)) {
2562                         Logger::error('Self contact not found', ['uid' => $contact['uid']]);
2563                         return false;
2564                 }
2565
2566                 $datarray['contact-id'] = $self['id'];
2567
2568                 $datarray['author-name']   = $datarray['owner-name']   = $self['name'];
2569                 $datarray['author-link']   = $datarray['owner-link']   = $self['url'];
2570                 $datarray['author-avatar'] = $datarray['owner-avatar'] = $self['thumb'];
2571
2572                 unset($datarray['edited']);
2573
2574                 unset($datarray['network']);
2575                 unset($datarray['owner-id']);
2576                 unset($datarray['author-id']);
2577
2578                 if ($contact['network'] != Protocol::FEED) {
2579                         $old_uri_id = $datarray['uri-id'] ?? 0;
2580                         $datarray['guid'] = System::createUUID();
2581                         unset($datarray['plink']);
2582                         $datarray['uri'] = self::newURI($datarray['guid']);
2583                         $datarray['uri-id'] = ItemURI::getIdByURI($datarray['uri']);
2584                         $datarray['extid'] = Protocol::DFRN;
2585                         $urlpart = parse_url($datarray2['author-link']);
2586                         $datarray['app'] = $urlpart['host'];
2587                         if (!empty($old_uri_id)) {
2588                                 Post\Media::copy($old_uri_id, $datarray['uri-id']);
2589                         }
2590
2591                         unset($datarray['parent-uri']);
2592                         unset($datarray['thr-parent']);
2593
2594                         // Store the original post
2595                         $result = self::insert($datarray2);
2596                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result' => $result, 'item' => $datarray2]);
2597                 } else {
2598                         $datarray['app'] = 'Feed';
2599                         $result = true;
2600                 }
2601
2602                 if ($result) {
2603                         unset($datarray['private']);
2604                 }
2605
2606                 return (bool)$result;
2607         }
2608
2609         /**
2610          *
2611          * @param string $s
2612          * @param int    $uid
2613          * @param array  $item
2614          * @param int    $cid
2615          * @return string
2616          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2617          * @throws \ImagickException
2618          */
2619         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2620         {
2621                 if (DI::config()->get('system', 'disable_embedded')) {
2622                         return $s;
2623                 }
2624
2625                 Logger::info('check for photos');
2626                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2627
2628                 $orig_body = $s;
2629                 $new_body = '';
2630
2631                 $img_start = strpos($orig_body, '[img');
2632                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2633                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2634
2635                 while (($img_st_close !== false) && ($img_len !== false)) {
2636                         $img_st_close++; // make it point to AFTER the closing bracket
2637                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2638
2639                         Logger::info('found photo', ['image' => $image]);
2640
2641                         if (stristr($image, $site . '/photo/')) {
2642                                 // Only embed locally hosted photos
2643                                 $replace = false;
2644                                 $i = basename($image);
2645                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2646                                 $x = strpos($i, '-');
2647
2648                                 if ($x) {
2649                                         $res = substr($i, $x + 1);
2650                                         $i = substr($i, 0, $x);
2651                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2652                                         if (DBA::isResult($photo)) {
2653                                                 /*
2654                                                  * Check to see if we should replace this photo link with an embedded image
2655                                                  * 1. No need to do so if the photo is public
2656                                                  * 2. If there's a contact-id provided, see if they're in the access list
2657                                                  *    for the photo. If so, embed it.
2658                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2659                                                  *    permissions, regardless of order but first check to see if they're an exact
2660                                                  *    match to save some processing overhead.
2661                                                  */
2662                                                 if (self::hasPermissions($photo)) {
2663                                                         if ($cid) {
2664                                                                 $recips = self::enumeratePermissions($photo);
2665                                                                 if (in_array($cid, $recips)) {
2666                                                                         $replace = true;
2667                                                                 }
2668                                                         } elseif ($item) {
2669                                                                 if (self::samePermissions($uid, $item, $photo)) {
2670                                                                         $replace = true;
2671                                                                 }
2672                                                         }
2673                                                 }
2674                                                 if ($replace) {
2675                                                         $photo_img = Photo::getImageForPhoto($photo);
2676                                                         // If a custom width and height were specified, apply before embedding
2677                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2678                                                                 Logger::info('scaling photo');
2679
2680                                                                 $width = intval($match[1]);
2681                                                                 $height = intval($match[2]);
2682
2683                                                                 $photo_img->scaleDown(max($width, $height));
2684                                                         }
2685
2686                                                         $data = $photo_img->asString();
2687                                                         $type = $photo_img->getType();
2688
2689                                                         Logger::info('replacing photo');
2690                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2691                                                         Logger::debug('replaced', ['image' => $image]);
2692                                                 }
2693                                         }
2694                                 }
2695                         }
2696
2697                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2698                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2699                         if ($orig_body === false) {
2700                                 $orig_body = '';
2701                         }
2702
2703                         $img_start = strpos($orig_body, '[img');
2704                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2705                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2706                 }
2707
2708                 $new_body = $new_body . $orig_body;
2709
2710                 return $new_body;
2711         }
2712
2713         private static function hasPermissions(array $obj)
2714         {
2715                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2716                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2717         }
2718
2719         // @TODO $uid is unused parameter
2720         private static function samePermissions($uid, array $obj1, array $obj2): bool
2721         {
2722                 // first part is easy. Check that these are exactly the same.
2723                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2724                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2725                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2726                         && ($obj1['deny_gid'] == $obj2['deny_gid'])
2727                 ) {
2728                         return true;
2729                 }
2730
2731                 // This is harder. Parse all the permissions and compare the resulting set.
2732                 $recipients1 = self::enumeratePermissions($obj1);
2733                 $recipients2 = self::enumeratePermissions($obj2);
2734                 sort($recipients1);
2735                 sort($recipients2);
2736
2737                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2738                 return ($recipients1 == $recipients2);
2739         }
2740
2741         /**
2742          * Returns an array of contact-ids that are allowed to see this object
2743          *
2744          * @param array $obj              Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2745          * @param bool  $check_dead       Prunes unavailable contacts from the result
2746          * @param bool  $expand_followers Expand the list of followers
2747          * @return array
2748          * @throws \Exception
2749          */
2750         public static function enumeratePermissions(array $obj, bool $check_dead = false, bool $expand_followers = true): array
2751         {
2752                 $aclFormatter = DI::aclFormatter();
2753
2754                 if (!$expand_followers && (!empty($obj['deny_cid']) || !empty($obj['deny_gid']))) {
2755                         $expand_followers = true;
2756                 }
2757
2758                 $allow_people  = $aclFormatter->expand($obj['allow_cid']);
2759                 $allow_circles = Circle::expand($obj['uid'], $aclFormatter->expand($obj['allow_gid']), $check_dead, $expand_followers);
2760                 $deny_people   = $aclFormatter->expand($obj['deny_cid']);
2761                 $deny_circles  = Circle::expand($obj['uid'], $aclFormatter->expand($obj['deny_gid']), $check_dead);
2762                 $recipients    = array_unique(array_merge($allow_people, $allow_circles));
2763                 $deny          = array_unique(array_merge($deny_people, $deny_circles));
2764                 $recipients    = array_diff($recipients, $deny);
2765                 return $recipients;
2766         }
2767
2768         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2769         {
2770                 if (!$uid || ($days < 1)) {
2771                         return;
2772                 }
2773
2774                 $condition = [
2775                         "`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2776                         $uid, self::GRAVITY_PARENT
2777                 ];
2778
2779                 /*
2780                  * $expire_network_only = save your own wall posts
2781                  * and just expire conversations started by others
2782                  */
2783                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2784
2785                 if ($expire_network_only) {
2786                         $condition[0] .= " AND NOT `wall`";
2787                 }
2788
2789                 if ($network != "") {
2790                         $condition[0] .= " AND `network` = ?";
2791                         $condition[] = $network;
2792                 }
2793
2794                 $condition[0] .= " AND `received` < ?";
2795                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2796
2797                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2798
2799                 if (!DBA::isResult($items)) {
2800                         return;
2801                 }
2802
2803                 $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
2804
2805                 // Forcing expiring of items - but not notes and marked items
2806                 if ($force) {
2807                         $expire_items = true;
2808                 }
2809
2810                 $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
2811                 $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
2812                 $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
2813
2814                 $expired = 0;
2815
2816                 $priority = DI::config()->get('system', 'expire-notify-priority');
2817
2818                 while ($item = Post::fetch($items)) {
2819                         // don't expire filed items
2820                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2821                                 continue;
2822                         }
2823
2824                         // Only expire posts, not photos and photo comments
2825
2826                         if (!$expire_photos && !empty($item['resource-id'])) {
2827                                 continue;
2828                         } elseif (!$expire_starred && intval($item['starred'])) {
2829                                 continue;
2830                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2831                                 continue;
2832                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2833                                 continue;
2834                         }
2835
2836                         self::markForDeletionById($item['id'], $priority);
2837
2838                         ++$expired;
2839                 }
2840                 DBA::close($items);
2841                 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]);
2842         }
2843
2844         public static function firstPostDate(int $uid, bool $wall = false)
2845         {
2846                 $user = User::getById($uid, ['register_date']);
2847                 if (empty($user)) {
2848                         return false;
2849                 }
2850
2851                 $condition = [
2852                         "`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2853                         $uid, $wall, $user['register_date']
2854                 ];
2855                 $params = ['order' => ['received' => false]];
2856                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2857                 if (DBA::isResult($thread)) {
2858                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2859                         return $postdate;
2860                 }
2861                 return false;
2862         }
2863
2864         /**
2865          * add/remove activity to an item
2866          *
2867          * Toggle activities as like,dislike,attend of an item
2868          *
2869          * @param int    $item_id
2870          * @param string $verb
2871          *            Activity verb. One of
2872          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2873          *            attendno, unattendno, attendmaybe, unattendmaybe,
2874          *            announce, unannounce
2875          * @param int    $uid
2876          * @param string $allow_cid
2877          * @param string $allow_gid
2878          * @param string $deny_cid
2879          * @param string $deny_gid
2880          * @return bool
2881          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2882          * @throws \ImagickException
2883          * @hook  'post_local_end'
2884          *            array $arr
2885          *            'post_id' => ID of posted item
2886          */
2887         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2888         {
2889                 if (empty($uid)) {
2890                         return false;
2891                 }
2892
2893                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2894
2895                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2896                 if (!DBA::isResult($item)) {
2897                         Logger::warning('Post had not been fetched', ['id' => $item_id]);
2898                         return false;
2899                 }
2900
2901                 $uri_id = $item['uri-id'];
2902
2903                 if (!in_array($item['uid'], [0, $uid])) {
2904                         return false;
2905                 }
2906
2907                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2908                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2909                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2910                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2911                                 if (!DBA::isResult($item)) {
2912                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2913                                         return false;
2914                                 }
2915                         }
2916                 }
2917
2918                 // Retrieves the local post owner
2919                 $owner = User::getOwnerDataById($uid);
2920                 if (empty($owner)) {
2921                         Logger::info('Empty owner for user', ['uid' => $uid]);
2922                         return false;
2923                 }
2924
2925                 // Retrieve the current logged in user's public contact
2926                 $author_id = Contact::getPublicIdByUserId($uid);
2927                 if (empty($author_id)) {
2928                         Logger::info('Empty public contact');
2929                         return false;
2930                 }
2931
2932                 $activity = null;
2933                 switch ($verb) {
2934                         case 'like':
2935                         case 'unlike':
2936                                 $activity = Activity::LIKE;
2937                                 break;
2938                         case 'dislike':
2939                         case 'undislike':
2940                                 $activity = Activity::DISLIKE;
2941                                 break;
2942                         case 'attendyes':
2943                         case 'unattendyes':
2944                                 $activity = Activity::ATTEND;
2945                                 break;
2946                         case 'attendno':
2947                         case 'unattendno':
2948                                 $activity = Activity::ATTENDNO;
2949                                 break;
2950                         case 'attendmaybe':
2951                         case 'unattendmaybe':
2952                                 $activity = Activity::ATTENDMAYBE;
2953                                 break;
2954                         case 'follow':
2955                         case 'unfollow':
2956                                 $activity = Activity::FOLLOW;
2957                                 break;
2958                         case 'announce':
2959                         case 'unannounce':
2960                                 $activity = Activity::ANNOUNCE;
2961                                 break;
2962                         default:
2963                                 Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2964                                 return false;
2965                 }
2966
2967                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2968
2969                 // Enable activity toggling instead of on/off
2970                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2971
2972                 // Look for an existing verb row
2973                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2974                 if ($event_verb_flag) {
2975                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2976
2977                         // Translate to the index based activity index
2978                         $vids = [];
2979                         foreach ($verbs as $verb) {
2980                                 $vids[] = Verb::getID($verb);
2981                         }
2982                 } else {
2983                         $vids = Verb::getID($activity);
2984                 }
2985
2986                 $condition = [
2987                         'vid' => $vids, 'deleted' => false, 'gravity' => self::GRAVITY_ACTIVITY,
2988                         'author-id' => $author_id, 'uid' => $uid, 'thr-parent-id' => $uri_id
2989                 ];
2990                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2991
2992                 if (DBA::isResult($like_item)) {
2993                         /**
2994                          * Truth table for existing activities
2995                          *
2996                          * |          Inputs            ||      Outputs      |
2997                          * |----------------------------||-------------------|
2998                          * |  Mode  | Event | Same verb || Delete? | Return? |
2999                          * |--------|-------|-----------||---------|---------|
3000                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
3001                          * | create |  Yes  |    No     ||   Yes   |   No    |
3002                          * | create |  No   |    Yes    ||   No    |   Yes   |
3003                          * | create |  No   |    No     ||        N/A†       |
3004                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
3005                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
3006                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
3007                          * | delete |  No   |    No     ||        N/A†       |
3008                          * |--------|-------|-----------||---------|---------|
3009                          * |   A    |   B   |     C     || A xor C | !B or C |
3010                          *
3011                          * † Can't happen: It's impossible to find an existing non-event activity without
3012                          *                 the same verb because we are only looking for this single verb.
3013                          *
3014                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
3015                          */
3016                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
3017                                 self::markForDeletionById($like_item['id']);
3018                         }
3019
3020                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3021                                 return true;
3022                         }
3023                 }
3024
3025                 // No need to go further if we aren't creating anything
3026                 if ($mode == 'delete') {
3027                         return true;
3028                 }
3029
3030                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3031
3032                 $new_item = [
3033                         'guid'          => System::createUUID(),
3034                         'uri'           => self::newURI(),
3035                         'uid'           => $uid,
3036                         'contact-id'    => $owner['id'],
3037                         'wall'          => $item['wall'],
3038                         'origin'        => 1,
3039                         'network'       => Protocol::DFRN,
3040                         'protocol'      => Conversation::PARCEL_DIRECT,
3041                         'direction'     => Conversation::PUSH,
3042                         'gravity'       => self::GRAVITY_ACTIVITY,
3043                         'parent'        => $item['id'],
3044                         'thr-parent'    => $item['uri'],
3045                         'owner-id'      => $author_id,
3046                         'author-id'     => $author_id,
3047                         'body'          => $activity,
3048                         'verb'          => $activity,
3049                         'object-type'   => $objtype,
3050                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
3051                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
3052                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
3053                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
3054                         'visible'       => 1,
3055                         'unseen'        => 1,
3056                 ];
3057
3058                 if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
3059                         $signed = Diaspora::createLikeSignature($uid, $new_item);
3060                         if (!empty($signed)) {
3061                                 $new_item['diaspora_signed_text'] = json_encode($signed);
3062                         }
3063                 }
3064
3065                 self::insert($new_item, true);
3066
3067                 // If the parent item isn't visible then set it to visible
3068                 // @todo Check if this is still needed
3069                 if (!$item['visible']) {
3070                         self::update(['visible' => true], ['id' => $item['id']]);
3071                 }
3072                 return true;
3073         }
3074
3075         /**
3076          * Fetch the SQL condition for the given user id
3077          *
3078          * @param integer $owner_id User ID for which the permissions should be fetched
3079          * @return array condition
3080          */
3081         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
3082         {
3083                 $local_user = DI::userSession()->getLocalUserId();
3084                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
3085
3086                 // default permissions - anonymous user
3087                 $condition = ["`private` != ?", self::PRIVATE];
3088
3089                 if ($local_user && ($local_user == $owner_id)) {
3090                         // Profile owner - everything is visible
3091                         $condition = [];
3092                 } elseif ($remote_user) {
3093                         // Authenticated visitor - fetch the matching permissionsets
3094                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
3095                         if (!empty($set)) {
3096                                 $condition = [
3097                                         "(`private` != ? OR (`private` = ? AND `wall`
3098                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
3099                                         self::PRIVATE, self::PRIVATE
3100                                 ];
3101                                 $condition = array_merge($condition, $permissionSets->column('id'));
3102                         }
3103                 }
3104
3105                 return $condition;
3106         }
3107
3108         /**
3109          * Get a permission SQL string for the given user
3110          *
3111          * @param int $owner_id
3112          * @param string $table
3113          * @return string
3114          */
3115         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
3116         {
3117                 $local_user = DI::userSession()->getLocalUserId();
3118                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
3119
3120                 if (!empty($table)) {
3121                         $table = DBA::quoteIdentifier($table) . '.';
3122                 }
3123
3124                 /*
3125                  * Construct permissions
3126                  *
3127                  * default permissions - anonymous user
3128                  */
3129                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
3130
3131                 // Profile owner - everything is visible
3132                 if ($local_user && ($local_user == $owner_id)) {
3133                         $sql = '';
3134                 } elseif ($remote_user) {
3135                         /*
3136                          * Authenticated visitor. Unless pre-verified,
3137                          * check that the contact belongs to this $owner_id
3138                          * and load the circles the visitor belongs to.
3139                          * If pre-verified, the caller is expected to have already
3140                          * done this and passed the circles into this function.
3141                          */
3142                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
3143
3144                         if (!empty($set)) {
3145                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
3146                         } else {
3147                                 $sql_set = '';
3148                         }
3149
3150                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
3151                 }
3152
3153                 return $sql;
3154         }
3155
3156         /**
3157          * get translated item type
3158          *
3159          * @param array                $item
3160          * @param \Friendica\Core\L10n $l10n
3161          * @return string
3162          */
3163         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
3164         {
3165                 if (!empty($item['event-id'])) {
3166                         return $l10n->t('event');
3167                 } elseif (!empty($item['resource-id'])) {
3168                         return $l10n->t('photo');
3169                 } elseif ($item['gravity'] == self::GRAVITY_ACTIVITY) {
3170                         return $l10n->t('activity');
3171                 } elseif ($item['gravity'] == self::GRAVITY_COMMENT) {
3172                         return $l10n->t('comment');
3173                 }
3174
3175                 return $l10n->t('post');
3176         }
3177
3178         /**
3179          * Sets the "rendered-html" field of the provided item
3180          *
3181          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3182          *
3183          * @param array $item
3184          *
3185          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3186          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3187          */
3188         private static function putInCache(&$item)
3189         {
3190                 // Save original body to prevent addons to modify it
3191                 $body = $item['body'];
3192
3193                 $rendered_hash = $item['rendered-hash'] ?? '';
3194                 $rendered_html = $item['rendered-html'] ?? '';
3195
3196                 if (
3197                         $rendered_hash == ''
3198                         || $rendered_html == ''
3199                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
3200                         || DI::config()->get('system', 'ignore_cache')
3201                 ) {
3202                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
3203                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
3204
3205                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3206                         Hook::callAll('put_item_in_cache', $hook_data);
3207                         $item['rendered-html'] = $hook_data['rendered-html'];
3208                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3209                         unset($hook_data);
3210
3211                         // Update if the generated values differ from the existing ones
3212                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
3213                                 self::update(
3214                                         [
3215                                                 'rendered-html' => $item['rendered-html'],
3216                                                 'rendered-hash' => $item['rendered-hash']
3217                                         ],
3218                                         ['id' => $item['id']]
3219                                 );
3220                         }
3221                 }
3222
3223                 $item['body'] = $body;
3224         }
3225
3226         /**
3227          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3228          * If attach is true, also add icons for item attachments.
3229          *
3230          * @param array   $item Record from item table
3231          * @param boolean $attach If true, add icons for item attachments as well
3232          * @param boolean $is_preview Whether this is a preview
3233          * @param boolean $only_cache Whether only cached HTML should be updated
3234          * @return string item body html
3235          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3236          * @throws \ImagickException
3237          * @hook  prepare_body_init item array before any work
3238          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3239          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3240          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3241          */
3242         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
3243         {
3244                 $a = DI::app();
3245                 Hook::callAll('prepare_body_init', $item);
3246
3247
3248                 // In order to provide theme developers more possibilities, event items
3249                 // are treated differently.
3250                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3251                         $ev = Event::getItemHTML($item);
3252                         return $ev;
3253                 }
3254
3255                 $tags = Tag::populateFromItem($item);
3256
3257                 $item['tags'] = $tags['tags'];
3258                 $item['hashtags'] = $tags['hashtags'];
3259                 $item['mentions'] = $tags['mentions'];
3260
3261                 if (!$is_preview) {
3262                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3263                         $item['body'] = Post\Media::removeFromEndOfBody($item['body'] ?? '');
3264                         $item['body'] = Post\Media::replaceImage($item['body']);
3265                 }
3266
3267                 $body = $item['body'];
3268                 if ($is_preview) {
3269                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3270                 }
3271
3272                 $fields = ['uri-id', 'uri', 'body', 'title', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink', 'network', 'has-media', 'quote-uri-id', 'post-type'];
3273
3274                 $shared_uri_id      = 0;
3275                 $shared_links       = [];
3276                 $quote_shared_links = [];
3277
3278                 $shared = DI::contentItem()->getSharedPost($item, $fields);
3279                 if (!empty($shared['post'])) {
3280                         $shared_item  = $shared['post'];
3281                         $shared_item['body'] = Post\Media::removeFromEndOfBody($shared_item['body']);
3282                         $shared_item['body'] = Post\Media::replaceImage($shared_item['body']);
3283                         $quote_uri_id = $shared['post']['uri-id'];
3284                         $shared_links[] = strtolower($shared['post']['uri']);
3285                         $item['body'] = BBCode::removeSharedData($item['body']);
3286                 } elseif (empty($shared_item['uri-id']) && empty($item['quote-uri-id']) && ($item['network'] != Protocol::DIASPORA)) {
3287                         $media = Post\Media::getByURIId($item['uri-id'], [Post\Media::ACTIVITY]);
3288                         if (!empty($media) && ($media[0]['media-uri-id'] != $item['uri-id'])) {
3289                                 $shared_item = Post::selectFirst($fields, ['uri-id' => $media[0]['media-uri-id'], 'uid' => [$item['uid'], 0]]);
3290                                 if (empty($shared_item['uri-id'])) {
3291                                         $shared_item = Post::selectFirst($fields, ['plink' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3292                                 } elseif (!in_array(strtolower($media[0]['url']), $shared_links)) {
3293                                         $shared_links[] = strtolower($media[0]['url']);
3294                                 }
3295
3296                                 if (empty($shared_item['uri-id'])) {
3297                                         $shared_item = Post::selectFirst($fields, ['uri' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3298                                         $shared_links[] = strtolower($media[0]['url']);
3299                                 }
3300
3301                                 if (!empty($shared_item['uri-id'])) {
3302                                         $data = BBCode::getAttachmentData($shared_item['body']);
3303                                         if (!empty($data['url'])) {
3304                                                 $quote_shared_links[] = $data['url'];
3305                                         }
3306
3307                                         $quote_uri_id = $shared_item['uri-id'];
3308                                 }
3309                         }
3310                 }
3311
3312                 if (!empty($quote_uri_id)) {
3313                         if (isset($shared_item['plink'])) {
3314                                 $item['body'] .= "\n" . DI::contentItem()->createSharedBlockByArray($shared_item, false, true);
3315                         } else {
3316                                 DI::logger()->warning('Missing plink in shared item', ['item' => $item, 'shared' => $shared, 'quote_uri_id' => $quote_uri_id, 'shared_item' => $shared_item]);
3317                         }
3318                 }
3319
3320                 if (!empty($shared_item['uri-id'])) {
3321                         $shared_uri_id = $shared_item['uri-id'];
3322                         $shared_links[] = strtolower($shared_item['plink']);
3323                         $sharedSplitAttachments = DI::postMediaRepository()->splitAttachments($shared_uri_id, [], $shared_item['has-media']);
3324                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['visual']->column('url'));
3325                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['link']->column('url'));
3326                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['additional']->column('url'));
3327                         $item['body'] = self::replaceVisualAttachments($sharedSplitAttachments['visual'], $item['body']);
3328                 }
3329
3330                 $itemSplitAttachments = DI::postMediaRepository()->splitAttachments($item['uri-id'], $shared_links, $item['has-media'] ?? false);
3331                 $item['body'] = self::replaceVisualAttachments($itemSplitAttachments['visual'], $item['body'] ?? '');
3332
3333                 self::putInCache($item);
3334                 $item['body'] = $body;
3335                 $s = $item["rendered-html"];
3336
3337                 if ($only_cache) {
3338                         return '';
3339                 }
3340
3341                 // Compile eventual content filter reasons
3342                 $filter_reasons = [];
3343                 if (!$is_preview && DI::userSession()->getPublicContactId() != $item['author-id']) {
3344                         if (!empty($item['user-blocked-author']) || !empty($item['user-blocked-owner'])) {
3345                                 $filter_reasons[] = DI::l10n()->t('%s is blocked', $item['author-name']);
3346                         } elseif (!empty($item['user-ignored-author']) || !empty($item['user-ignored-owner'])) {
3347                                 $filter_reasons[] = DI::l10n()->t('%s is ignored', $item['author-name']);
3348                         } elseif (!empty($item['user-collapsed-author']) || !empty($item['user-collapsed-owner'])) {
3349                                 $filter_reasons[] = DI::l10n()->t('Content from %s is collapsed', $item['author-name']);
3350                         }
3351
3352                         if (!empty($item['content-warning']) && (!DI::userSession()->getLocalUserId() || !DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'disable_cw', false))) {
3353                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3354                         }
3355
3356                         $item['attachments'] = $itemSplitAttachments;
3357
3358                         $hook_data = [
3359                                 'item' => $item,
3360                                 'filter_reasons' => $filter_reasons
3361                         ];
3362                         Hook::callAll('prepare_body_content_filter', $hook_data);
3363                         $filter_reasons = $hook_data['filter_reasons'];
3364                         unset($hook_data);
3365                 }
3366
3367                 $hook_data = [
3368                         'item' => $item,
3369                         'html' => $s,
3370                         'preview' => $is_preview,
3371                         'filter_reasons' => $filter_reasons
3372                 ];
3373                 Hook::callAll('prepare_body', $hook_data);
3374                 $s = $hook_data['html'];
3375
3376                 unset($hook_data);
3377
3378                 if (!$attach) {
3379                         // Replace the blockquotes with quotes that are used in mails.
3380                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3381                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3382                         return $s;
3383                 }
3384
3385                 if (!empty($sharedSplitAttachments)) {
3386                         $s = self::addGallery($s, $sharedSplitAttachments['visual']);
3387                         $s = self::addVisualAttachments($sharedSplitAttachments['visual'], $shared_item, $s, true);
3388                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $sharedSplitAttachments, $body, $s, true, $quote_shared_links);
3389                         $s = self::addNonVisualAttachments($sharedSplitAttachments['additional'], $item, $s, true);
3390                         $body = BBCode::removeSharedData($body);
3391                 }
3392
3393                 $pos = strpos($s, BBCode::SHARED_ANCHOR);
3394                 if ($pos) {
3395                         $shared_html = substr($s, $pos + strlen(BBCode::SHARED_ANCHOR));
3396                         $s = substr($s, 0, $pos);
3397                 }
3398
3399                 $s = self::addGallery($s, $itemSplitAttachments['visual']);
3400                 $s = self::addVisualAttachments($itemSplitAttachments['visual'], $item, $s, false);
3401                 $s = self::addLinkAttachment($item['uri-id'], $itemSplitAttachments, $body, $s, false, $shared_links);
3402                 $s = self::addNonVisualAttachments($itemSplitAttachments['additional'], $item, $s, false);
3403                 $s = self::addQuestions($item, $s);
3404
3405                 // Map.
3406                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3407                         $x = Map::byCoordinates(trim($item['coord']));
3408                         if ($x) {
3409                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3410                         }
3411                 }
3412
3413                 // Replace friendica image url size with theme preference.
3414                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
3415                         $ps = $a->getThemeInfoValue('item_image_size');
3416                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3417                 }
3418
3419                 if (!empty($shared_html)) {
3420                         $s .= $shared_html;
3421                 }
3422
3423                 $s = HTML::applyContentFilter($s, $filter_reasons);
3424
3425                 $hook_data = ['item' => $item, 'html' => $s];
3426                 Hook::callAll('prepare_body_final', $hook_data);
3427                 return $hook_data['html'];
3428         }
3429
3430         /**
3431          * Modify links to pictures to links for the "Fancybox" gallery
3432          *
3433          * @param string     $s
3434          * @param PostMedias $PostMedias
3435          * @return string
3436          */
3437         private static function addGallery(string $s, PostMedias $PostMedias): string
3438         {
3439                 foreach ($PostMedias as $PostMedia) {
3440                         if (!$PostMedia->preview || ($PostMedia->type !== Post\Media::IMAGE)) {
3441                                 continue;
3442                         }
3443
3444                         if ($PostMedia->hasDimensions()) {
3445                                 $pattern = '#<a href="' . preg_quote($PostMedia->url) . '">(.*?)"></a>#';
3446
3447                                 $s = preg_replace_callback($pattern, function () use ($PostMedia) {
3448                                         return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image/single_with_height_allocation.tpl'), [
3449                                                 '$image' => $PostMedia,
3450                                                 '$allocated_height' => $PostMedia->getAllocatedHeight(),
3451                                                 '$allocated_max_width' => ($PostMedia->previewWidth ?? $PostMedia->width) . 'px',
3452                                         ]);
3453                                 }, $s);
3454                         } else {
3455                                 $s = str_replace('<a href="' . $PostMedia->url . '"', '<a data-fancybox="uri-id-' . $PostMedia->uriId . '" href="' . $PostMedia->url . '"', $s);
3456                         }
3457                 }
3458
3459                 return $s;
3460         }
3461
3462         /**
3463          * Check if the body contains a link
3464          *
3465          * @param string $body
3466          * @param string $url
3467          * @param int    $type
3468          * @return bool
3469          */
3470         public static function containsLink(string $body, string $url, int $type = 0): bool
3471         {
3472                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
3473                 $urlparts = parse_url($url);
3474                 if (empty($urlparts)) {
3475                         return false;
3476                 }
3477
3478                 unset($urlparts['query']);
3479                 unset($urlparts['fragment']);
3480
3481                 try {
3482                         $url = (string)Uri::fromParts((array)$urlparts);
3483                 } catch (\InvalidArgumentException $e) {
3484                         DI::logger()->notice('Invalid URL', ['$url' => $url, '$urlparts' => $urlparts]);
3485                         /* See https://github.com/friendica/friendica/issues/12113
3486                          * Malformed URLs will result in a Fatal Error
3487                          */
3488                         return false;
3489                 }
3490
3491                 // Remove media links to only search in embedded content
3492                 // @todo Check images for image link, audio for audio links, ...
3493                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3494                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3495                 }
3496
3497                 if (strpos($body, $url)) {
3498                         return true;
3499                 }
3500
3501                 foreach ([0, 1, 2] as $size) {
3502                         if (
3503                                 preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3504                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)
3505                         ) {
3506                                 return true;
3507                         }
3508                 }
3509
3510                 return false;
3511         }
3512
3513         /**
3514          * Replace visual attachments in the body
3515          *
3516          * @param PostMedias $PostMedias
3517          * @param string     $body
3518          * @return string modified body
3519          */
3520         private static function replaceVisualAttachments(PostMedias $PostMedias, string $body): string
3521         {
3522                 DI::profiler()->startRecording('rendering');
3523
3524                 foreach ($PostMedias as $PostMedia) {
3525                         if ($PostMedia->preview) {
3526                                 if (DI::baseUrl()->isLocalUri($PostMedia->preview)) {
3527                                         continue;
3528                                 }
3529                                 $proxy   = DI::baseUrl() . $PostMedia->getPreviewPath(Proxy::SIZE_LARGE);
3530                                 $search  = ['[img=' . $PostMedia->preview . ']', ']' . $PostMedia->preview . '[/img]'];
3531                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3532
3533                                 $body = str_replace($search, $replace, $body);
3534                         } elseif ($PostMedia->mimetype->type == 'image') {
3535                                 if (DI::baseUrl()->isLocalUri($PostMedia->url)) {
3536                                         continue;
3537                                 }
3538                                 $proxy   = DI::baseUrl() . $PostMedia->getPreviewPath(Proxy::SIZE_LARGE);
3539                                 $search  = ['[img=' . $PostMedia->url . ']', ']' . $PostMedia->url . '[/img]'];
3540                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3541
3542                                 $body = str_replace($search, $replace, $body);
3543                         }
3544                 }
3545                 DI::profiler()->stopRecording();
3546                 return $body;
3547         }
3548
3549         /**
3550          * Add visual attachments to the content
3551          *
3552          * @param PostMedias $PostMedias
3553          * @param array      $item
3554          * @param string     $content
3555          * @param bool       $shared
3556          * @return string modified content
3557          * @throws ServiceUnavailableException
3558          */
3559         private static function addVisualAttachments(PostMedias $PostMedias, array $item, string $content, bool $shared): string
3560         {
3561                 DI::profiler()->startRecording('rendering');
3562                 $leading  = '';
3563                 $trailing = '';
3564                 $images   = new PostMedias();
3565
3566                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3567                 foreach ($PostMedias as $PostMedia) {
3568                         if (self::containsLink($item['body'], $PostMedia->preview ?? $PostMedia->url, $PostMedia->type)) {
3569                                 continue;
3570                         }
3571
3572                         if ($PostMedia->mimetype->type == 'image' || $PostMedia->preview) {
3573                                 $preview_size = Proxy::SIZE_MEDIUM;
3574                                 $preview_url = DI::baseUrl() . $PostMedia->getPreviewPath($preview_size);
3575                         } else {
3576                                 $preview_size = 0;
3577                                 $preview_url = '';
3578                         }
3579
3580                         if ($preview_url && self::containsLink($item['body'], $preview_url)) {
3581                                 continue;
3582                         }
3583
3584                         if ($PostMedia->mimetype->type == 'video') {
3585                                 /// @todo Move the template to /content as well
3586                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3587                                         '$video' => [
3588                                                 'id'      => $PostMedia->id,
3589                                                 'src'     => (string)$PostMedia->url,
3590                                                 'name'    => $PostMedia->name ?: $PostMedia->url,
3591                                                 'preview' => $preview_url,
3592                                                 'mime'    => (string)$PostMedia->mimetype,
3593                                         ],
3594                                 ]);
3595                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3596                                         $leading .= $media;
3597                                 } else {
3598                                         $trailing .= $media;
3599                                 }
3600                         } elseif ($PostMedia->mimetype->type == 'audio') {
3601                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3602                                         '$audio' => [
3603                                                 'id'     => $PostMedia->id,
3604                                                 'src'    => (string)$PostMedia->url,
3605                                                 'name'   => $PostMedia->name ?: $PostMedia->url,
3606                                                 'mime'   => (string)$PostMedia->mimetype,
3607                                         ],
3608                                 ]);
3609                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3610                                         $leading .= $media;
3611                                 } else {
3612                                         $trailing .= $media;
3613                                 }
3614                         } elseif ($PostMedia->mimetype->type == 'image') {
3615                                 $src_url = DI::baseUrl() . $PostMedia->getPhotoPath();
3616                                 if (self::containsLink($item['body'], $src_url)) {
3617                                         continue;
3618                                 }
3619
3620                                 $images[] = $PostMedia->withUrl(new Uri($src_url))->withPreview(new Uri($preview_url), $preview_size);
3621                         }
3622                 }
3623
3624                 $media = Image::getBodyAttachHtml($images);
3625
3626                 // On Diaspora posts the attached pictures are leading
3627                 if ($item['network'] == Protocol::DIASPORA) {
3628                         $leading .= $media;
3629                 } else {
3630                         $trailing .= $media;
3631                 }
3632
3633                 if ($shared) {
3634                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '</div>' . BBCode::TOP_ANCHOR, $content);
3635                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '</div>' . BBCode::BOTTOM_ANCHOR, $content);
3636                 } else {
3637                         if ($leading != '') {
3638                                 $content = '<div class="body-attach">' . $leading . '</div>' . $content;
3639                         }
3640
3641                         if ($trailing != '') {
3642                                 $content .= '<div class="body-attach">' . $trailing . '</div>';
3643                         }
3644                 }
3645
3646                 DI::profiler()->stopRecording();
3647                 return $content;
3648         }
3649
3650         /**
3651          * Add link attachment to the content
3652          *
3653          * @param int          $uriid
3654          * @param PostMedias[] $attachments
3655          * @param string       $body
3656          * @param string       $content
3657          * @param bool         $shared
3658          * @param array        $ignore_links A list of URLs to ignore
3659          * @return string modified content
3660          * @throws InternalServerErrorException
3661          * @throws ServiceUnavailableException
3662          */
3663         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3664         {
3665                 DI::profiler()->startRecording('rendering');
3666                 // Don't show a preview when there is a visual attachment (audio or video)
3667                 $types = $attachments['visual']->column('type');
3668                 $preview = !in_array(PostMedia::TYPE_IMAGE, $types) && !in_array(PostMedia::TYPE_VIDEO, $types);
3669
3670                 /** @var ?PostMedia $attachment */
3671                 $attachment = null;
3672                 foreach ($attachments['link'] as $PostMedia) {
3673                         $found = false;
3674                         foreach ($ignore_links as $ignore_link) {
3675                                 if (Strings::compareLink($PostMedia->url, $ignore_link)) {
3676                                         $found = true;
3677                                 }
3678                         }
3679                         // @todo Judge between the links to use the one with most information
3680                         if (!$found && (empty($attachment) || $PostMedia->authorName ||
3681                                 (!$attachment->name && $PostMedia->name) ||
3682                                 (!$attachment->description && $PostMedia->description) ||
3683                                 (!$attachment->preview && $PostMedia->preview))) {
3684                                 $attachment = $PostMedia;
3685                         }
3686                 }
3687
3688                 if (!empty($attachment)) {
3689                         $data = [
3690                                 'after' => '',
3691                                 'author_name' => $attachment->authorName ?? '',
3692                                 'author_url' => (string)($attachment->authorUrl ?? ''),
3693                                 'description' => $attachment->description ?? '',
3694                                 'image' => '',
3695                                 'preview' => '',
3696                                 'provider_name' => $attachment->publisherName ?? '',
3697                                 'provider_url' => (string)($attachment->publisherUrl ?? ''),
3698                                 'text' => '',
3699                                 'title' => $attachment->name ?? '',
3700                                 'type' => 'link',
3701                                 'url' => (string)$attachment->url,
3702                         ];
3703
3704                         if ($preview && $attachment->preview) {
3705                                 if ($attachment->previewWidth >= 500) {
3706                                         $data['image'] = DI::baseUrl() . $attachment->getPreviewPath(Proxy::SIZE_MEDIUM);
3707                                 } else {
3708                                         $data['preview'] = DI::baseUrl() . $attachment->getPreviewPath(Proxy::SIZE_MEDIUM);
3709                                 }
3710                         }
3711
3712                         if (!empty($data['description']) && !empty($content)) {
3713                                 similar_text($data['description'], $content, $percent);
3714                         } else {
3715                                 $percent = 0;
3716                         }
3717
3718                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3719                                 $data['description'] = '';
3720                         }
3721
3722                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3723                                 $data['author_name'] = '';
3724                         }
3725
3726                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3727                                 $data['author_url'] = '';
3728                         }
3729                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3730                         $data = BBCode::getAttachmentData($match[1]);
3731                 }
3732                 DI::profiler()->stopRecording();
3733
3734                 if (isset($data['url']) && !in_array(strtolower($data['url']), $ignore_links)) {
3735                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview']) || (!empty($data['title']) && !Strings::compareLink($data['title'], $data['url']))) {
3736                                 $parts = parse_url($data['url']);
3737                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3738                                         if (empty($data['provider_name'])) {
3739                                                 $data['provider_name'] = $parts['host'];
3740                                         }
3741                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3742                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3743
3744                                                 if (!empty($parts['port'])) {
3745                                                         $data['provider_url'] .= ':' . $parts['port'];
3746                                                 }
3747                                         }
3748                                 }
3749
3750                                 // @todo Use a template
3751                                 $preview_mode = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'preview_mode', BBCode::PREVIEW_LARGE);
3752                                 if ($preview_mode != BBCode::PREVIEW_NONE) {
3753                                         $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid, $preview_mode);
3754                                 } else {
3755                                         $rendered = '';
3756                                 }
3757                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3758                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3759                                         '$url'   => $data['url'],
3760                                         '$title' => $data['title'],
3761                                 ]);
3762                         } else {
3763                                 return $content;
3764                         }
3765
3766                         if ($shared) {
3767                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3768                         } else {
3769                                 return $content . $rendered;
3770                         }
3771                 }
3772                 return $content;
3773         }
3774
3775         /**
3776          * Add non-visual attachments to the content
3777          *
3778          * @param PostMedias $PostMedias
3779          * @param array      $item
3780          * @param string     $content
3781          * @return string modified content
3782          * @throws InternalServerErrorException
3783          * @throws \ImagickException
3784          */
3785         private static function addNonVisualAttachments(PostMedias $PostMedias, array $item, string $content): string
3786         {
3787                 DI::profiler()->startRecording('rendering');
3788                 $trailing = '';
3789                 foreach ($PostMedias as $PostMedia) {
3790                         if (strpos($item['body'], (string)$PostMedia->url)) {
3791                                 continue;
3792                         }
3793
3794                         $author = [
3795                                 'uid'     => 0,
3796                                 'id'      => $item['author-id'],
3797                                 'network' => $item['author-network'],
3798                                 'url'     => $item['author-link'],
3799                                 'alias'   => $item['author-alias']
3800                         ];
3801                         $the_url = Contact::magicLinkByContact($author, $PostMedia->url);
3802
3803                         $title = Strings::escapeHtml(trim($PostMedia->description ?? '' ?: $PostMedia->url));
3804
3805                         if ($PostMedia->size) {
3806                                 $title .= ' ' . $PostMedia->size . ' ' . DI::l10n()->t('bytes');
3807                         }
3808
3809                         /// @todo Use a template
3810                         $icon = '<div class="attachtype icon s22 type-' . $PostMedia->mimetype->type . ' subtype-' . $PostMedia->mimetype->subtype . '"></div>';
3811                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3812                 }
3813
3814                 if ($trailing != '') {
3815                         $content .= '<div class="body-attach">' . $trailing . '</div>';
3816                 }
3817
3818                 DI::profiler()->stopRecording();
3819                 return $content;
3820         }
3821
3822         private static function addQuestions(array $item, string $content): string
3823         {
3824                 DI::profiler()->startRecording('rendering');
3825                 if (!empty($item['question-id'])) {
3826                         $question = [
3827                                 'id'       => $item['question-id'],
3828                                 'multiple' => $item['question-multiple'],
3829                                 'voters'   => $item['question-voters'],
3830                                 'endtime'  => $item['question-end-time']
3831                         ];
3832
3833                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3834                         foreach ($options as $key => $option) {
3835                                 if ($question['voters'] > 0) {
3836                                         $percent = $option['replies'] / $question['voters'] * 100;
3837                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%3$d%%, %1$d vote)', '%2$s (%3$d%%, %1$d votes)', $option['replies'] ?? 0, $option['name'], round($percent, 1));
3838                                 } else {
3839                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'] ?? 0, $option['name']);
3840                                 }
3841                         }
3842
3843                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3844                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'] ?? 0, Temporal::getRelativeDate($question['endtime']));
3845                         } elseif (!empty($question['voters'])) {
3846                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters'] ?? 0);
3847                         } elseif (!empty($question['endtime'])) {
3848                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3849                         } else {
3850                                 $summary = '';
3851                         }
3852
3853                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3854                                 '$question' => $question,
3855                                 '$options'  => $options,
3856                                 '$summary'  => $summary,
3857                         ]);
3858                 }
3859                 DI::profiler()->stopRecording();
3860                 return $content;
3861         }
3862
3863         /**
3864          * get private link for item
3865          *
3866          * @param array $item
3867          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3868          * @throws \Exception
3869          */
3870         public static function getPlink(array $item)
3871         {
3872                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3873                         $plink = $item['plink'];
3874                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3875                         $plink = $item['uri'];
3876                 }
3877
3878                 if (DI::userSession()->getLocalUserId()) {
3879                         $ret = [
3880                                 'href' => "display/" . $item['guid'],
3881                                 'orig' => "display/" . $item['guid'],
3882                                 'title' => DI::l10n()->t('View on separate page'),
3883                                 'orig_title' => DI::l10n()->t('View on separate page'),
3884                         ];
3885
3886                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3887                                 $author = [
3888                                         'uid'     => 0,
3889                                         'id'      => $item['author-id'],
3890                                         'network' => $item['author-network'],
3891                                         'url'     => $item['author-link'],
3892                                         'alias'   => $item['author-alias'],
3893                                 ];
3894                                 $plink = Contact::magicLinkByContact($author, $plink);
3895                         }
3896
3897                         if (!empty($plink)) {
3898                                 $ret['href'] = DI::baseUrl()->remove($plink);
3899                                 $ret['title'] = DI::l10n()->t('Link to source');
3900                         }
3901                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3902                         $ret = [
3903                                 'href' => $plink,
3904                                 'orig' => $plink,
3905                                 'title' => DI::l10n()->t('Link to source'),
3906                                 'orig_title' => DI::l10n()->t('Link to source'),
3907                         ];
3908                 } else {
3909                         $ret = [];
3910                 }
3911
3912                 return $ret;
3913         }
3914
3915         /**
3916          * Does the given uri-id belongs to a post that is sent as starting post to a group?
3917          * This does apply to posts that are sent via ! and not in parallel to a group via @
3918          *
3919          * @param int $uri_id
3920          *
3921          * @return boolean "true" when it is a group post
3922          */
3923         public static function isGroupPost(int $uri_id): bool
3924         {
3925                 if (Post::exists(['private' => Item::PUBLIC, 'uri-id' => $uri_id])) {
3926                         return false;
3927                 }
3928
3929                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION, Tag::AUDIENCE]) as $tag) {
3930                         // @todo Possibly check for a public audience in the future, see https://socialhub.activitypub.rocks/t/fep-1b12-group-federation/2724
3931                         // and https://codeberg.org/fediverse/fep/src/branch/main/feps/fep-1b12.md
3932                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3933                                 return true;
3934                         }
3935                 }
3936                 return false;
3937         }
3938
3939         /**
3940          * Search item id for given URI or plink
3941          *
3942          * @param string $uri
3943          * @param integer $uid
3944          *
3945          * @return integer item id
3946          */
3947         public static function searchByLink(string $uri, int $uid = 0): int
3948         {
3949                 $ssl_uri = str_replace('http://', 'https://', $uri);
3950                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3951
3952                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3953                 if (DBA::isResult($item)) {
3954                         return $item['id'];
3955                 }
3956
3957                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3958                 if (DBA::isResult($item)) {
3959                         return $item['id'];
3960                 }
3961
3962                 return 0;
3963         }
3964
3965         /**
3966          * Return the URI for a link to the post
3967          *
3968          * @param string $uri URI or link to post
3969          *
3970          * @return string URI
3971          */
3972         public static function getURIByLink(string $uri): string
3973         {
3974                 $ssl_uri = str_replace('http://', 'https://', $uri);
3975                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3976
3977                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3978                 if (DBA::isResult($item)) {
3979                         return $item['uri'];
3980                 }
3981
3982                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3983                 if (DBA::isResult($item)) {
3984                         return $item['uri'];
3985                 }
3986
3987                 return '';
3988         }
3989
3990         /**
3991          * Fetches item for given URI or plink
3992          *
3993          * @param string $uri
3994          * @param int    $uid
3995          * @param int    $completion
3996          *
3997          * @return integer item id
3998          */
3999         public static function fetchByLink(string $uri, int $uid = 0, int $completion = ActivityPub\Receiver::COMPLETION_MANUAL): int
4000         {
4001                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
4002                 $item_id = self::searchByLink($uri, $uid);
4003                 if (!empty($item_id)) {
4004                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
4005                         return $item_id;
4006                 }
4007
4008                 $hookData = [
4009                         'uri'     => $uri,
4010                         'uid'     => $uid,
4011                         'item_id' => null,
4012                 ];
4013
4014                 Hook::callAll('item_by_link', $hookData);
4015
4016                 if (isset($hookData['item_id'])) {
4017                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
4018                 }
4019
4020                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri, [], '', $completion, $uid);
4021
4022                 if ($fetched_uri) {
4023                         $item_id = self::searchByLink($fetched_uri, $uid);
4024                 } else {
4025                         $item_id = Diaspora::fetchByURL($uri);
4026                 }
4027
4028                 if (!empty($item_id)) {
4029                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
4030                         return $item_id;
4031                 }
4032
4033                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
4034                 return 0;
4035         }
4036
4037         /**
4038          * Fetch the uri-id of a quote
4039          *
4040          * @param string $body
4041          * @return integer
4042          */
4043         public static function getQuoteUriId(string $body, int $uid = 0): int
4044         {
4045                 $shared = BBCode::fetchShareAttributes($body);
4046                 if (empty($shared['guid']) && empty($shared['message_id'])) {
4047                         return 0;
4048                 }
4049
4050                 if (empty($shared['link']) && empty($shared['message_id'])) {
4051                         Logger::notice('Invalid share block.', ['share' => $shared]);
4052                         return 0;
4053                 }
4054
4055                 if (!empty($shared['guid'])) {
4056                         $shared_item = Post::selectFirst(['uri-id'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
4057                         if (!empty($shared_item['uri-id'])) {
4058                                 Logger::debug('Found post by guid', ['guid' => $shared['guid'], 'uid' => $uid]);
4059                                 return $shared_item['uri-id'];
4060                         }
4061                 }
4062
4063                 if (!empty($shared['message_id'])) {
4064                         $shared_item = Post::selectFirst(['uri-id'], ['uri' => $shared['message_id'], 'uid' => [0, $uid]]);
4065                         if (!empty($shared_item['uri-id'])) {
4066                                 Logger::debug('Found post by message_id', ['message_id' => $shared['message_id'], 'uid' => $uid]);
4067                                 return $shared_item['uri-id'];
4068                         }
4069                 }
4070
4071                 if (!empty($shared['link'])) {
4072                         $shared_item = Post::selectFirst(['uri-id'], ['plink' => $shared['link'], 'uid' => [0, $uid]]);
4073                         if (!empty($shared_item['uri-id'])) {
4074                                 Logger::debug('Found post by link', ['link' => $shared['link'], 'uid' => $uid]);
4075                                 return $shared_item['uri-id'];
4076                         }
4077                 }
4078
4079                 $url = $shared['message_id'] ?: $shared['link'];
4080                 $id = self::fetchByLink($url, 0, ActivityPub\Receiver::COMPLETION_ASYNC);
4081                 if (!$id) {
4082                         Logger::notice('Post could not be fetched.', ['url' => $url, 'uid' => $uid]);
4083                         return 0;
4084                 }
4085
4086                 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
4087                 if (!empty($shared_item['uri-id'])) {
4088                         Logger::debug('Fetched shared post', ['id' => $id, 'url' => $url, 'uid' => $uid]);
4089                         return $shared_item['uri-id'];
4090                 }
4091
4092                 Logger::warning('Post does not exist although it was supposed to had been fetched.', ['id' => $id, 'url' => $url, 'uid' => $uid]);
4093                 return 0;
4094         }
4095 }