src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Model\Tag;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\DI;
  36 use Friendica\Model\Post;
  37 use Friendica\Protocol\Activity;
  38 use Friendica\Protocol\ActivityPub;
  39 use Friendica\Protocol\Diaspora;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Map;
  42 use Friendica\Util\Network;
  43 use Friendica\Util\Proxy;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use LanguageDetection\Language;
  47
  48 class Item
  49 {
  50         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  51         const PT_ARTICLE = 0;
  52         const PT_NOTE = 1;
  53         const PT_PAGE = 2;
  54         const PT_IMAGE = 16;
  55         const PT_AUDIO = 17;
  56         const PT_VIDEO = 18;
  57         const PT_DOCUMENT = 19;
  58         const PT_EVENT = 32;
  59         const PT_PERSONAL_NOTE = 128;
  60
  61         // Posting reasons (Why had a post been stored for a user?)
  62         const PR_NONE = 0;
  63         const PR_TAG = 64;
  64         const PR_TO = 65;
  65         const PR_CC = 66;
  66         const PR_BTO = 67;
  67         const PR_BCC = 68;
  68         const PR_FOLLOWER = 69;
  69         const PR_ANNOUNCEMENT = 70;
  70         const PR_COMMENT = 71;
  71         const PR_STORED = 72;
  72         const PR_GLOBAL = 73;
  73         const PR_RELAY = 74;
  74         const PR_FETCHED = 75;
  75
  76         // Field list that is used to display the items
  77         const DISPLAY_FIELDLIST = [
  78                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  79                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri',
  80                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  81                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  82                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  83                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention',
  84                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  85                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type',
  86                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  87                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  88                 'writable', 'self', 'cid', 'alias',
  89                 'event-created', 'event-edited', 'event-start', 'event-finish',
  90                 'event-summary', 'event-desc', 'event-location', 'event-type',
  91                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  92                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  93         ];
  94
  95         // Field list that is used to deliver items via the protocols
  96         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  97                         'parent-guid', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  98                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
  99                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 100                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 101                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 102                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'forum_mode', 'origin',
 103                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 104                         'event-created', 'event-edited', 'event-start', 'event-finish',
 105                         'event-summary', 'event-desc', 'event-location', 'event-type',
 106                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
 107
 108         // All fields in the item table
 109         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 110                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 111                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 112                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 113                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 114                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 115                         'private', 'pubmail', 'visible', 'starred',
 116                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 117                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 118                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 119                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 120                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 121
 122         // List of all verbs that don't need additional content data.
 123         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 124         const ACTIVITIES = [
 125                 Activity::LIKE, Activity::DISLIKE,
 126                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 127                 Activity::FOLLOW,
 128                 Activity::ANNOUNCE];
 129
 130         const PUBLIC = 0;
 131         const PRIVATE = 1;
 132         const UNLISTED = 2;
 133
 134         /**
 135          * Update existing item entries
 136          *
 137          * @param array $fields    The fields that are to be changed
 138          * @param array $condition The condition for finding the item entries
 139          *
 140          * In the future we may have to change permissions as well.
 141          * Then we had to add the user id as third parameter.
 142          *
 143          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 144          *
 145          * @return integer|boolean number of affected rows - or "false" if there was an error
 146          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 147          */
 148         public static function update(array $fields, array $condition)
 149         {
 150                 if (empty($condition) || empty($fields)) {
 151                         return false;
 152                 }
 153
 154                 if (isset($fields['extid'])) {
 155                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 156                 }
 157
 158                 if (!empty($fields['verb'])) {
 159                         $fields['vid'] = Verb::getID($fields['verb']);
 160                 }
 161
 162                 $rows = Post::update($fields, $condition);
 163                 if (is_bool($rows)) {
 164                         return $rows;
 165                 }
 166
 167                 // We only need to call the line by line update for specific fields
 168                 if (empty($fields['body']) && empty($fields['file']) &&
 169                         empty($fields['attach']) && empty($fields['edited'])) {
 170                         return $rows;
 171                 }
 172
 173                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 174
 175                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 176
 177                 $notify_items = [];
 178
 179                 while ($item = DBA::fetch($items)) {
 180                         if (!empty($fields['body'])) {
 181                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 182
 183                                 if ($item['author-network'] != Protocol::DFRN) {
 184                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $fields['body']);
 185                                 }
 186
 187                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 188
 189                                 // Remove all media attachments from the body and store them in the post-media table
 190                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 191                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 192                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 193                         }
 194
 195                         if (!empty($fields['file'])) {
 196                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 197                         }
 198
 199                         if (!empty($fields['attach'])) {
 200                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 201                         }
 202
 203                         // We only need to notfiy others when it is an original entry from us.
 204                         // Only call the notifier when the item has some content relevant change.
 205                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 206                                 $notify_items[] = $item['id'];
 207                         }
 208                 }
 209
 210                 DBA::close($items);
 211
 212                 foreach ($notify_items as $notify_item) {
 213                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 214                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 215                 }
 216
 217                 return $rows;
 218         }
 219
 220         /**
 221          * Delete an item and notify others about it - if it was ours
 222          *
 223          * @param array   $condition The condition for finding the item entries
 224          * @param integer $priority  Priority for the notification
 225          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 226          */
 227         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 228         {
 229                 $items = Post::select(['id'], $condition);
 230                 while ($item = Post::fetch($items)) {
 231                         self::markForDeletionById($item['id'], $priority);
 232                 }
 233                 DBA::close($items);
 234         }
 235
 236         /**
 237          * Delete an item for an user and notify others about it - if it was ours
 238          *
 239          * @param array   $condition The condition for finding the item entries
 240          * @param integer $uid       User who wants to delete this item
 241          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 242          */
 243         public static function deleteForUser($condition, $uid)
 244         {
 245                 if ($uid == 0) {
 246                         return;
 247                 }
 248
 249                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 250                 while ($item = Post::fetch($items)) {
 251                         if (in_array($item['uid'], [$uid, 0])) {
 252                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 253                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 254                         }
 255
 256                         if ($item['uid'] == $uid) {
 257                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 258                         } elseif ($item['uid'] != 0) {
 259                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 260                         }
 261                 }
 262                 DBA::close($items);
 263         }
 264
 265         /**
 266          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 267          *
 268          * @param integer $item_id
 269          * @param integer $priority Priority for the notification
 270          *
 271          * @return boolean success
 272          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 273          */
 274         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 275         {
 276                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 277                 // locate item to be deleted
 278                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 279                         'deleted', 'resource-id', 'event-id',
 280                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 281                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 282                 if (!DBA::isResult($item)) {
 283                         Logger::info('Item not found.', ['id' => $item_id]);
 284                         return false;
 285                 }
 286
 287                 if ($item['deleted']) {
 288                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 289                         return false;
 290                 }
 291
 292                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 293                 if (!DBA::isResult($parent)) {
 294                         $parent = ['origin' => false];
 295                 }
 296
 297                 // clean up categories and tags so they don't end up as orphans
 298                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 299
 300                 /*
 301                  * If item is a link to a photo resource, nuke all the associated photos
 302                  * (visitors will not have photo resources)
 303                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 304                  * generate a resource-id and therefore aren't intimately linked to the item.
 305                  */
 306                 /// @TODO: this should first check if photo is used elsewhere
 307                 if (strlen($item['resource-id'])) {
 308                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 309                 }
 310
 311                 // If item is a link to an event, delete the event.
 312                 if (intval($item['event-id'])) {
 313                         Event::delete($item['event-id']);
 314                 }
 315
 316                 // If item has attachments, drop them
 317                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 318                 foreach($attachments as $attachment) {
 319                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 320                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 321                         }
 322                 }
 323
 324                 // Set the item to "deleted"
 325                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 326                 Post::update($item_fields, ['id' => $item['id']]);
 327
 328                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 329
 330                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 331                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 332                 }
 333
 334                 Post\DeliveryData::delete($item['uri-id']);
 335
 336                 // If it's the parent of a comment thread, kill all the kids
 337                 if ($item['gravity'] == GRAVITY_PARENT) {
 338                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 339                 }
 340
 341                 // Is it our comment and/or our thread?
 342                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 343                         // When we delete the original post we will delete all existing copies on the server as well
 344                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 345
 346                         // send the notification upstream/downstream
 347                         if ($priority) {
 348                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 349                         }
 350                 } elseif ($item['uid'] != 0) {
 351                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 352                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 353                 }
 354
 355                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 356
 357                 return true;
 358         }
 359
 360         private static function guid($item, $notify)
 361         {
 362                 if (!empty($item['guid'])) {
 363                         return Strings::escapeTags(trim($item['guid']));
 364                 }
 365
 366                 if ($notify) {
 367                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 368                         // We add the hash of our own host because our host is the original creator of the post.
 369                         $prefix_host = DI::baseUrl()->getHostname();
 370                 } else {
 371                         $prefix_host = '';
 372
 373                         // We are only storing the post so we create a GUID from the original hostname.
 374                         if (!empty($item['author-link'])) {
 375                                 $parsed = parse_url($item['author-link']);
 376                                 if (!empty($parsed['host'])) {
 377                                         $prefix_host = $parsed['host'];
 378                                 }
 379                         }
 380
 381                         if (empty($prefix_host) && !empty($item['plink'])) {
 382                                 $parsed = parse_url($item['plink']);
 383                                 if (!empty($parsed['host'])) {
 384                                         $prefix_host = $parsed['host'];
 385                                 }
 386                         }
 387
 388                         if (empty($prefix_host) && !empty($item['uri'])) {
 389                                 $parsed = parse_url($item['uri']);
 390                                 if (!empty($parsed['host'])) {
 391                                         $prefix_host = $parsed['host'];
 392                                 }
 393                         }
 394
 395                         // Is it in the format data@host.tld? - Used for mail contacts
 396                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 397                                 $mailparts = explode('@', $item['author-link']);
 398                                 $prefix_host = array_pop($mailparts);
 399                         }
 400                 }
 401
 402                 if (!empty($item['plink'])) {
 403                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 404                 } elseif (!empty($item['uri'])) {
 405                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 406                 } else {
 407                         $guid = System::createUUID(hash('crc32', $prefix_host));
 408                 }
 409
 410                 return $guid;
 411         }
 412
 413         private static function contactId($item)
 414         {
 415                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 416                         return $item['contact-id'];
 417                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 418                         return $item['contact-id'];
 419                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 420                         return $item['author-id'];
 421                 } elseif (!empty($item['contact-id'])) {
 422                         return $item['contact-id'];
 423                 } else {
 424                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 425                         if (!empty($contact_id)) {
 426                                 return $contact_id;
 427                         }
 428                 }
 429                 return $item['author-id'];
 430         }
 431
 432         /**
 433          * Write an item array into a spool file to be inserted later.
 434          * This command is called whenever there are issues storing an item.
 435          *
 436          * @param array $item The item fields that are to be inserted
 437          * @throws \Exception
 438          */
 439         private static function spool($orig_item)
 440         {
 441                 // Now we store the data in the spool directory
 442                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 443                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 444
 445                 $spoolpath = get_spoolpath();
 446                 if ($spoolpath != "") {
 447                         $spool = $spoolpath . '/' . $file;
 448
 449                         file_put_contents($spool, json_encode($orig_item));
 450                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 451                 }
 452         }
 453
 454         /**
 455          * Check if the item array is a duplicate
 456          *
 457          * @param array $item
 458          * @return boolean is it a duplicate?
 459          */
 460         private static function isDuplicate(array $item)
 461         {
 462                 // Checking if there is already an item with the same guid
 463                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 464                 if (Post::exists($condition)) {
 465                         Logger::notice('Found already existing item', [
 466                                 'guid' => $item['guid'],
 467                                 'uid' => $item['uid'],
 468                                 'network' => $item['network']
 469                         ]);
 470                         return true;
 471                 }
 472
 473                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 474                         'network' => [$item['network'], Protocol::DFRN]];
 475                 if (Post::exists($condition)) {
 476                         Logger::notice('duplicated item with the same uri found.', $item);
 477                         return true;
 478                 }
 479
 480                 // On Friendica and Diaspora the GUID is unique
 481                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 482                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 483                         if (Post::exists($condition)) {
 484                                 Logger::notice('duplicated item with the same guid found.', $item);
 485                                 return true;
 486                         }
 487                 } elseif ($item['network'] == Protocol::OSTATUS) {
 488                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 489                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 490                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 491                         if (Post::exists($condition)) {
 492                                 Logger::notice('duplicated item with the same body found.', $item);
 493                                 return true;
 494                         }
 495                 }
 496
 497                 /*
 498                  * Check for already added items.
 499                  * There is a timing issue here that sometimes creates double postings.
 500                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 501                  */
 502                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 503                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 504                         return true;
 505                 }
 506
 507                 return false;
 508         }
 509
 510         /**
 511          * Check if the item array is valid
 512          *
 513          * @param array $item
 514          * @return boolean item is valid
 515          */
 516         public static function isValid(array $item)
 517         {
 518                 // When there is no content then we don't post it
 519                 if (($item['body'] . $item['title'] == '') && !Post\Media::existsByURIId($item['uri-id'])) {
 520                         Logger::notice('No body, no title.');
 521                         return false;
 522                 }
 523
 524                 if (!empty($item['uid'])) {
 525                         $owner = User::getOwnerDataById($item['uid'], false);
 526                         if (!$owner) {
 527                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 528                                 return false;
 529                         }
 530
 531                         if ($owner['account_expired'] || $owner['account_removed']) {
 532                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 533                                 return false;
 534                         }
 535                 }
 536
 537                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 538                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 539                         return false;
 540                 }
 541
 542                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 543                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 544                         return false;
 545                 }
 546
 547                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 548                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 549                         return false;
 550                 }
 551
 552                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 553                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 554                         return false;
 555                 }
 556
 557                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 558                         return false;
 559                 }
 560
 561                 if ($item['verb'] == Activity::FOLLOW) {
 562                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 563                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 564                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 565                                 return false;
 566                         }
 567
 568                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 569                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 570                         if (Post::exists($condition)) {
 571                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 572                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 573                                 return false;
 574                         }
 575                 }
 576
 577                 return true;
 578         }
 579
 580         /**
 581          * Check if the item array is too old
 582          *
 583          * @param array $item
 584          * @return boolean item is too old
 585          */
 586         public static function isTooOld(array $item)
 587         {
 588                 // check for create date and expire time
 589                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 590
 591                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 592                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 593                         $expire_interval = $user['expire'];
 594                 }
 595
 596                 if (($expire_interval > 0) && !empty($item['created'])) {
 597                         $expire_date = time() - ($expire_interval * 86400);
 598                         $created_date = strtotime($item['created']);
 599                         if ($created_date < $expire_date) {
 600                                 Logger::notice('Item created before expiration interval.', [
 601                                         'created' => date('c', $created_date),
 602                                         'expired' => date('c', $expire_date),
 603                                         '$item' => $item
 604                                 ]);
 605                                 return true;
 606                         }
 607                 }
 608
 609                 return false;
 610         }
 611
 612         /**
 613          * Return the id of the given item array if it has been stored before
 614          *
 615          * @param array $item
 616          * @return integer item id
 617          */
 618         private static function getDuplicateID(array $item)
 619         {
 620                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 621                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 622                                 $item['uri-id'], $item['uid'],
 623                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 624                         $existing = Post::selectFirst(['id', 'network'], $condition);
 625                         if (DBA::isResult($existing)) {
 626                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 627                                 if ($item['uid'] != 0) {
 628                                         Logger::notice('Item already existed for user', [
 629                                                 'uri-id' => $item['uri-id'],
 630                                                 'uid' => $item['uid'],
 631                                                 'network' => $item['network'],
 632                                                 'existing_id' => $existing["id"],
 633                                                 'existing_network' => $existing["network"]
 634                                         ]);
 635                                 }
 636
 637                                 return $existing["id"];
 638                         }
 639                 }
 640                 return 0;
 641         }
 642
 643         /**
 644          * Fetch top-level parent data for the given item array
 645          *
 646          * @param array $item
 647          * @return array item array with parent data
 648          * @throws \Exception
 649          */
 650         private static function getTopLevelParent(array $item)
 651         {
 652                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 653                         'uri-id', 'parent-uri-id',
 654                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 655                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
 656                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 657                 $params = ['order' => ['id' => false]];
 658                 $parent = Post::selectFirst($fields, $condition, $params);
 659
 660                 if (!DBA::isResult($parent)) {
 661                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 662                         return [];
 663                 }
 664
 665                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 666                         return $parent;
 667                 }
 668
 669                 $condition = ['uri-id' => $parent['parent-uri-id'],
 670                         'parent-uri-id' => $parent['parent-uri-id'],
 671                         'uid' => $parent['uid']];
 672                 $params = ['order' => ['id' => false]];
 673                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 674                 if (!DBA::isResult($toplevel_parent)) {
 675                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 676                         return [];
 677                 }
 678
 679                 return $toplevel_parent;
 680         }
 681
 682         /**
 683          * Get the gravity for the given item array
 684          *
 685          * @param array $item
 686          * @return integer gravity
 687          */
 688         private static function getGravity(array $item)
 689         {
 690                 $activity = DI::activity();
 691
 692                 if (isset($item['gravity'])) {
 693                         return intval($item['gravity']);
 694                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 695                         return GRAVITY_PARENT;
 696                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 697                         return GRAVITY_COMMENT;
 698                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 699                         return GRAVITY_ACTIVITY;
 700                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 701                         return GRAVITY_ACTIVITY;
 702                 }
 703                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 704                 return GRAVITY_UNKNOWN;   // Should not happen
 705         }
 706
 707         public static function insert($item, $notify = false, $dontcache = false)
 708         {
 709                 $orig_item = $item;
 710
 711                 $priority = PRIORITY_HIGH;
 712
 713                 // If it is a posting where users should get notifications, then define it as wall posting
 714                 if ($notify) {
 715                         $item['wall'] = 1;
 716                         $item['origin'] = 1;
 717                         $item['network'] = Protocol::DFRN;
 718                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 719                         $item['direction'] = Conversation::PUSH;
 720
 721                         if (in_array($notify, PRIORITIES)) {
 722                                 $priority = $notify;
 723                         }
 724                 } else {
 725                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 726                 }
 727
 728                 $uid = intval($item['uid']);
 729
 730                 $item['guid'] = self::guid($item, $notify);
 731                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 732
 733                 // Store URI data
 734                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 735
 736                 // Backward compatibility: parent-uri used to be the direct parent uri.
 737                 // If it is provided without a thr-parent, it probably is the old behavior.
 738                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 739                 $item['parent-uri'] = $item['thr-parent'];
 740
 741                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 742
 743                 // Store conversation data
 744                 $item = Conversation::insert($item);
 745
 746                 /*
 747                  * Do we already have this item?
 748                  * We have to check several networks since Friendica posts could be repeated
 749                  * via OStatus (maybe Diasporsa as well)
 750                  */
 751                 $duplicate = self::getDuplicateID($item);
 752                 if ($duplicate) {
 753                         return $duplicate;
 754                 }
 755
 756                 // Additional duplicate checks
 757                 /// @todo Check why the first duplication check returns the item number and the second a 0
 758                 if (self::isDuplicate($item)) {
 759                         return 0;
 760                 }
 761
 762                 if (!isset($item['post-type'])) {
 763                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 764                 }
 765
 766                 $item['wall']          = intval($item['wall'] ?? 0);
 767                 $item['extid']         = trim($item['extid'] ?? '');
 768                 $item['author-name']   = trim($item['author-name'] ?? '');
 769                 $item['author-link']   = trim($item['author-link'] ?? '');
 770                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 771                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 772                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 773                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 774                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 775                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 776                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 777                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 778                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 779                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 780                 $item['location']      = trim($item['location'] ?? '');
 781                 $item['coord']         = trim($item['coord'] ?? '');
 782                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 783                 $item['deleted']       = 0;
 784                 $item['verb']          = trim($item['verb'] ?? '');
 785                 $item['object-type']   = trim($item['object-type'] ?? '');
 786                 $item['object']        = trim($item['object'] ?? '');
 787                 $item['target-type']   = trim($item['target-type'] ?? '');
 788                 $item['target']        = trim($item['target'] ?? '');
 789                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 790                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 791                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 792                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 793                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 794                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 795                 $item['body']          = trim($item['body'] ?? '');
 796                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 797                 $item['app']           = trim($item['app'] ?? '');
 798                 $item['origin']        = intval($item['origin'] ?? 0);
 799                 $item['postopts']      = trim($item['postopts'] ?? '');
 800                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 801                 $item['event-id']      = intval($item['event-id'] ?? 0);
 802                 $item['inform']        = trim($item['inform'] ?? '');
 803                 $item['file']          = trim($item['file'] ?? '');
 804
 805                 // Items cannot be stored before they happen ...
 806                 if ($item['created'] > DateTimeFormat::utcNow()) {
 807                         $item['created'] = DateTimeFormat::utcNow();
 808                 }
 809
 810                 // We haven't invented time travel by now.
 811                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 812                         $item['edited'] = DateTimeFormat::utcNow();
 813                 }
 814
 815                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 816
 817                 $item['gravity'] = self::getGravity($item);
 818
 819                 $item['language'] = self::getLanguage($item);
 820
 821                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 822                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 823                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 824
 825                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 826                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 827                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 828
 829                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 830                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 831                         $item['post-reason'] = self::PR_FOLLOWER;
 832                 }
 833
 834                 // Ensure that there is an avatar cache
 835                 Contact::checkAvatarCache($item['author-id']);
 836                 Contact::checkAvatarCache($item['owner-id']);
 837
 838                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 839                 $item["contact-id"] = self::contactId($item);
 840
 841                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 842                         self::isTooOld($item)) {
 843                         Logger::info('Item is too old', ['item' => $item]);
 844                         return 0;
 845                 }
 846
 847                 if (!self::isValid($item)) {
 848                         return 0;
 849                 }
 850
 851                 if ($item['gravity'] !== GRAVITY_PARENT) {
 852                         $toplevel_parent = self::getTopLevelParent($item);
 853                         if (empty($toplevel_parent)) {
 854                                 return 0;
 855                         }
 856
 857                         // If the thread originated from this node, we check the permission against the thread starter
 858                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 859                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 860                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 861                                 return 0;
 862                         }
 863
 864                         $parent_id             = $toplevel_parent['id'];
 865                         $item['parent-uri']    = $toplevel_parent['uri'];
 866                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 867                         $item['deleted']       = $toplevel_parent['deleted'];
 868                         $item['allow_cid']     = $toplevel_parent['allow_cid'];
 869                         $item['allow_gid']     = $toplevel_parent['allow_gid'];
 870                         $item['deny_cid']      = $toplevel_parent['deny_cid'];
 871                         $item['deny_gid']      = $toplevel_parent['deny_gid'];
 872                         $parent_origin         = $toplevel_parent['origin'];
 873
 874                         // Don't federate received participation messages
 875                         if ($item['verb'] != Activity::FOLLOW) {
 876                                 $item['wall'] = $toplevel_parent['wall'];
 877                         } else {
 878                                 $item['wall'] = false;
 879                                 // Participations are technical messages, so they are set to "seen" automatically
 880                                 $item['unseen'] = false;
 881                         }
 882
 883                         /*
 884                          * If the parent is private, force privacy for the entire conversation
 885                          * This differs from the above settings as it subtly allows comments from
 886                          * email correspondents to be private even if the overall thread is not.
 887                          */
 888                         if ($toplevel_parent['private']) {
 889                                 $item['private'] = $toplevel_parent['private'];
 890                         }
 891
 892                         /*
 893                          * Edge case. We host a public forum that was originally posted to privately.
 894                          * The original author commented, but as this is a comment, the permissions
 895                          * weren't fixed up so it will still show the comment as private unless we fix it here.
 896                          */
 897                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
 898                                 $item['private'] = self::PUBLIC;
 899                         }
 900
 901                         // If its a post that originated here then tag the thread as "mention"
 902                         if ($item['origin'] && $item['uid']) {
 903                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 904                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 905                         }
 906
 907                         // Update the contact relations
 908                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 909                 } else {
 910                         $parent_id = 0;
 911                         $parent_origin = $item['origin'];
 912                 }
 913
 914                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 915                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 916
 917                 // Is this item available in the global items (with uid=0)?
 918                 if ($item["uid"] == 0) {
 919                         $item["global"] = true;
 920
 921                         // Set the global flag on all items if this was a global item entry
 922                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 923                 } else {
 924                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 925                 }
 926
 927                 // ACL settings
 928                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 929                         $item["private"] = self::PRIVATE;
 930                 }
 931
 932                 if ($notify) {
 933                         $item['edit'] = false;
 934                         $item['parent'] = $parent_id;
 935
 936                         // Trigger automatic reactions for addons
 937                         $item['api_source'] = true;
 938
 939                         // We have to tell the hooks who we are - this really should be improved
 940                         if (!local_user()) {
 941                                 $_SESSION['authenticated'] = true;
 942                                 $_SESSION['uid'] = $uid;
 943                                 $dummy_session = true;
 944                         } else {
 945                                 $dummy_session = false;
 946                         }
 947
 948                         Hook::callAll('post_local', $item);
 949
 950                         if ($dummy_session) {
 951                                 unset($_SESSION['authenticated']);
 952                                 unset($_SESSION['uid']);
 953                         }
 954                 } else {
 955                         Hook::callAll('post_remote', $item);
 956                 }
 957
 958                 if (!empty($item['cancel'])) {
 959                         Logger::log('post cancelled by addon.');
 960                         return 0;
 961                 }
 962
 963                 if (empty($item['vid']) && !empty($item['verb'])) {
 964                         $item['vid'] = Verb::getID($item['verb']);
 965                 }
 966
 967                 // Creates or assigns the permission set
 968                 $item['psid'] = PermissionSet::getIdFromACL(
 969                         $item['uid'],
 970                         $item['allow_cid'],
 971                         $item['allow_gid'],
 972                         $item['deny_cid'],
 973                         $item['deny_gid']
 974                 );
 975
 976                 if (!empty($item['extid'])) {
 977                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
 978                 }
 979
 980                 if ($item['verb'] == Activity::ANNOUNCE) {
 981                         self::setOwnerforResharedItem($item);
 982                 }
 983
 984                 if (isset($item['attachments'])) {
 985                         foreach ($item['attachments'] as $attachment) {
 986                                 $attachment['uri-id'] = $item['uri-id'];
 987                                 Post\Media::insert($attachment);
 988                         }
 989                         unset($item['attachments']);
 990                 }
 991
 992                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
 993
 994                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
 995                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['body']);
 996                 }
 997
 998                 // Remove all media attachments from the body and store them in the post-media table
 999                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1000                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1001
1002                 // Check for hashtags in the body and repair or add hashtag links
1003                 $item['body'] = self::setHashtags($item['body']);
1004
1005                 // Fill the cache field
1006                 self::putInCache($item);
1007
1008                 if (stristr($item['verb'], Activity::POKE)) {
1009                         $notify_type = Delivery::POKE;
1010                 } else {
1011                         $notify_type = Delivery::POST;
1012                 }
1013
1014                 // Filling item related side tables
1015                 if (!empty($item['attach'])) {
1016                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1017                 }
1018
1019                 if (empty($item['event-id'])) {
1020                         unset($item['event-id']);
1021
1022                         $ev = Event::fromBBCode($item['body']);
1023                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1024                                 Logger::info('Event found.');
1025                                 $ev['cid']       = $item['contact-id'];
1026                                 $ev['uid']       = $item['uid'];
1027                                 $ev['uri']       = $item['uri'];
1028                                 $ev['edited']    = $item['edited'];
1029                                 $ev['private']   = $item['private'];
1030                                 $ev['guid']      = $item['guid'];
1031                                 $ev['plink']     = $item['plink'];
1032                                 $ev['network']   = $item['network'];
1033                                 $ev['protocol']  = $item['protocol'];
1034                                 $ev['direction'] = $item['direction'];
1035                                 $ev['source']    = $item['source'];
1036
1037                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1038                                 if (DBA::isResult($event)) {
1039                                         $ev['id'] = $event['id'];
1040                                 }
1041
1042                                 $item['event-id'] = Event::store($ev);
1043                                 Logger::info('Event was stored', ['id' => $item['event-id']]);
1044                         }
1045                 }
1046
1047                 if (empty($item['causer-id'])) {
1048                         unset($item['causer-id']);
1049                 }
1050
1051                 Post::insert($item['uri-id'], $item);
1052
1053                 if ($item['gravity'] == GRAVITY_PARENT) {
1054                         Post\Thread::insert($item['uri-id'], $item);
1055                 }
1056
1057                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1058                         Post\Content::insert($item['uri-id'], $item);
1059                 }
1060
1061                 // Diaspora signature
1062                 if (!empty($item['diaspora_signed_text'])) {
1063                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1064                 }
1065
1066                 // Attached file links
1067                 if (!empty($item['file'])) {
1068                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1069                 }
1070
1071                 // Delivery relevant data
1072                 $delivery_data = Post\DeliveryData::extractFields($item);
1073
1074                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1075                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1076                 }
1077
1078                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1079                 if (!Tag::existsForPost($item['uri-id'])) {
1080                         Tag::storeFromBody($item['uri-id'], $item['body']);
1081                 }
1082
1083                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1084                 if (Post::exists($condition)) {
1085                         Logger::notice('Item is already inserted - aborting', $condition);
1086                         return 0;
1087                 }
1088
1089                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1090                 if (!$post_user_id) {
1091                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1092                         return 0;
1093                 }
1094
1095                 if ($item['gravity'] == GRAVITY_PARENT) {
1096                         $item['post-user-id'] = $post_user_id;
1097                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1098                 }
1099
1100                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1101
1102                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1103                 if (!DBA::isResult($posted_item)) {
1104                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1105                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1106                         self::spool($orig_item);
1107                         return 0;
1108                 }
1109
1110                 // update the commented timestamp on the parent
1111                 if (DI::config()->get('system', 'like_no_comment')) {
1112                         // Update when it is a comment
1113                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1114                 } else {
1115                         // Update when it isn't a follow or tag verb
1116                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1117                 }
1118
1119                 if ($update_commented) {
1120                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1121                 } else {
1122                         $fields = ['changed' => DateTimeFormat::utcNow()];
1123                 }
1124
1125                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1126
1127                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1128                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1129                         // Get the user information for the logging
1130                         $user = User::getById($uid);
1131
1132                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1133                         return 0;
1134                 }
1135
1136                 if (!$dontcache) {
1137                         if ($notify) {
1138                                 Hook::callAll('post_local_end', $posted_item);
1139                         } else {
1140                                 Hook::callAll('post_remote_end', $posted_item);
1141                         }
1142                 }
1143
1144                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1145                         self::addShadow($post_user_id);
1146                 } else {
1147                         self::addShadowPost($post_user_id);
1148                 }
1149
1150                 self::updateContact($posted_item);
1151
1152                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1153
1154                 check_user_notification($posted_item['uri-id'], $posted_item['uid']);
1155
1156                 // Distribute items to users who subscribed to their tags
1157                 self::distributeByTags($posted_item);
1158
1159                 // Automatically reshare the item if the "remote_self" option is selected
1160                 self::autoReshare($posted_item);
1161
1162                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1163
1164                 if ($transmit) {
1165                         // Don't relay participation messages
1166                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1167                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1168                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1169                                 $transmit = false;
1170                         }
1171                 }
1172
1173                 if ($transmit) {
1174                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1175                 }
1176
1177                 return $post_user_id;
1178         }
1179
1180         /**
1181          * Change the owner of a parent item if it had been shared by a forum
1182          *
1183          * (public) forum posts in the new format consist of the regular post by the author
1184          * followed by an announce message sent from the forum account.
1185          * Changing the owner helps in grouping forum posts.
1186          *
1187          * @param array $item
1188          * @return void
1189          */
1190         private static function setOwnerforResharedItem(array $item)
1191         {
1192                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1193                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1194                 if (!DBA::isResult($parent)) {
1195                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1196                         return;
1197                 }
1198
1199                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1200                 if (!DBA::isResult($author)) {
1201                         Logger::error('Author not found', ['id' => $item['author-id']]);
1202                         return;
1203                 }
1204
1205                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1206                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1207                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1208                         return;
1209                 }
1210
1211                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1212                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1213                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1214                                 return;
1215                         }
1216
1217                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1218                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1219                                 return;
1220                         }
1221                         self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1222                         Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1223                         return;
1224                 }
1225
1226                 self::update(['owner-id' => $item['author-id'], 'contact-id' => $cid], ['id' => $parent['id']]);
1227                 Logger::info('Change owner of the parent', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'owner-id' => $item['author-id'], 'contact-id' => $cid]);
1228         }
1229
1230         /**
1231          * Distribute the given item to users who subscribed to their tags
1232          *
1233          * @param array $item     Processed item
1234          */
1235         private static function distributeByTags(array $item)
1236         {
1237                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1238                         return;
1239                 }
1240
1241                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1242                 foreach ($uids as $uid) {
1243                         if (Contact::isSharing($item['author-id'], $uid)) {
1244                                 $fields = [];
1245                         } else {
1246                                 $fields = ['post-reason' => self::PR_TAG];
1247                         }
1248
1249                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1250                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1251                 }
1252         }
1253
1254         /**
1255          * Distributes public items to the receivers
1256          *
1257          * @param integer $itemid      Item ID that should be added
1258          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1259          * @throws \Exception
1260          */
1261         public static function distribute($itemid, $signed_text = '')
1262         {
1263                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1264                 $parent = Post::selectFirst(['owner-id'], $condition);
1265                 if (!DBA::isResult($parent)) {
1266                         Logger::warning('Item not found', ['condition' => $condition]);
1267                         return;
1268                 }
1269
1270                 // Only distribute public items from native networks
1271                 $condition = ['id' => $itemid, 'uid' => 0,
1272                         'network' => array_merge(Protocol::FEDERATED ,['']),
1273                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1274                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1275                 if (!DBA::isResult($item)) {
1276                         Logger::warning('Item not found', ['condition' => $condition]);
1277                         return;
1278                 }
1279
1280                 $origin = $item['origin'];
1281
1282                 $users = [];
1283
1284                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1285                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1286                 if (!DBA::isResult($owner)) {
1287                         return;
1288                 }
1289
1290                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1291                 $contacts = DBA::select('contact', ['uid'], $condition);
1292                 while ($contact = DBA::fetch($contacts)) {
1293                         if ($contact['uid'] == 0) {
1294                                 continue;
1295                         }
1296
1297                         $users[$contact['uid']] = $contact['uid'];
1298                 }
1299                 DBA::close($contacts);
1300
1301                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1302                 $contacts = DBA::select('contact', ['uid'], $condition);
1303                 while ($contact = DBA::fetch($contacts)) {
1304                         if ($contact['uid'] == 0) {
1305                                 continue;
1306                         }
1307
1308                         $users[$contact['uid']] = $contact['uid'];
1309                 }
1310                 DBA::close($contacts);
1311
1312                 if (!empty($owner['alias'])) {
1313                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1314                         $contacts = DBA::select('contact', ['uid'], $condition);
1315                         while ($contact = DBA::fetch($contacts)) {
1316                                 if ($contact['uid'] == 0) {
1317                                         continue;
1318                                 }
1319
1320                                 $users[$contact['uid']] = $contact['uid'];
1321                         }
1322                         DBA::close($contacts);
1323                 }
1324
1325                 $origin_uid = 0;
1326
1327                 if ($item['uri-id'] != $item['parent-uri-id']) {
1328                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1329                         while ($parent = Post::fetch($parents)) {
1330                                 $users[$parent['uid']] = $parent['uid'];
1331                                 if ($parent['origin'] && !$origin) {
1332                                         $origin_uid = $parent['uid'];
1333                                 }
1334                         }
1335                         DBA::close($parents);
1336                 }
1337
1338                 foreach ($users as $uid) {
1339                         if ($origin_uid == $uid) {
1340                                 $item['diaspora_signed_text'] = $signed_text;
1341                         }
1342                         self::storeForUser($item, $uid);
1343                 }
1344         }
1345
1346         /**
1347          * Store a public item defined by their URI-ID for the given users
1348          *
1349          * @param integer $uri_id     URI-ID of the given item
1350          * @param integer $uid        The user that will receive the item entry
1351          * @param array   $fields     Additional fields to be stored
1352          * @param integer $source_uid User id of the source post
1353          * @return integer stored item id
1354          */
1355         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1356         {
1357                 if ($uid == $source_uid) {
1358                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1359                         return 0;
1360                 }
1361
1362                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1363                 if (!DBA::isResult($item)) {
1364                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1365                         return 0;
1366                 }
1367
1368                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1369                         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']]);
1370                         return 0;
1371                 }
1372
1373                 $item['post-reason'] = self::PR_STORED;
1374
1375                 $item = array_merge($item, $fields);
1376
1377                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1378
1379                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1380                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') &&
1381                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1382                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1383                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1384                         return 0;
1385                 }
1386
1387                 if ((($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1388                         // Only do an auto complete with the source uid "0" to prevent privavy problems
1389                         $causer = $item['causer-id'] ?: $item['author-id'];
1390                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED]);
1391                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1392                 }
1393
1394                 $stored = self::storeForUser($item, $uid);
1395                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1396                 return $stored;
1397         }
1398
1399         /**
1400          * Store a public item array for the given users
1401          *
1402          * @param array   $item   The item entry that will be stored
1403          * @param integer $uid    The user that will receive the item entry
1404          * @return integer stored item id
1405          * @throws \Exception
1406          */
1407         private static function storeForUser(array $item, int $uid)
1408         {
1409                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1410                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1411                         return 0;
1412                 }
1413
1414                 unset($item['id']);
1415                 unset($item['mention']);
1416                 unset($item['starred']);
1417                 unset($item['unseen']);
1418                 unset($item['psid']);
1419                 unset($item['pinned']);
1420                 unset($item['ignored']);
1421                 unset($item['pubmail']);
1422                 unset($item['forum_mode']);
1423
1424                 unset($item['event-id']);
1425                 unset($item['hidden']);
1426                 unset($item['notification-type']);
1427
1428                 $item['uid'] = $uid;
1429                 $item['origin'] = 0;
1430                 $item['wall'] = 0;
1431
1432                 if ($item['gravity'] == GRAVITY_PARENT) {
1433                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1434                 } else {
1435                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1436                 }
1437
1438                 if (!empty($contact['id'])) {
1439                         $item['contact-id'] = $contact['id'];
1440                 } else {
1441                         // Shouldn't happen at all
1442                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1443                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1444                         if (!DBA::isResult($self)) {
1445                                 // Shouldn't happen even less
1446                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1447                                 return 0;
1448                         }
1449                         $item['contact-id'] = $self['id'];
1450                 }
1451
1452                 $notify = false;
1453                 if ($item['gravity'] == GRAVITY_PARENT) {
1454                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1455                         if (DBA::isResult($contact)) {
1456                                 $notify = self::isRemoteSelf($contact, $item);
1457                         }
1458                 }
1459
1460                 $distributed = self::insert($item, $notify, true);
1461
1462                 if (!$distributed) {
1463                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1464                 } else {
1465                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1466                 }
1467                 return $distributed;
1468         }
1469
1470         /**
1471          * Add a shadow entry for a given item id that is a thread starter
1472          *
1473          * We store every public item entry additionally with the user id "0".
1474          * This is used for the community page and for the search.
1475          * It is planned that in the future we will store public item entries only once.
1476          *
1477          * @param integer $itemid Item ID that should be added
1478          * @throws \Exception
1479          */
1480         private static function addShadow($itemid)
1481         {
1482                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1483                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1484                 $item = Post::selectFirst($fields, $condition);
1485
1486                 if (!DBA::isResult($item)) {
1487                         return;
1488                 }
1489
1490                 // is it already a copy?
1491                 if (($itemid == 0) || ($item['uid'] == 0)) {
1492                         return;
1493                 }
1494
1495                 // Is it a visible public post?
1496                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1497                         return;
1498                 }
1499
1500                 // is it an entry from a connector? Only add an entry for natively connected networks
1501                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1502                         return;
1503                 }
1504
1505                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1506                         return;
1507                 }
1508
1509                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1510
1511                 if (DBA::isResult($item)) {
1512                         // Preparing public shadow (removing user specific data)
1513                         $item['uid'] = 0;
1514                         unset($item['id']);
1515                         unset($item['parent']);
1516                         unset($item['wall']);
1517                         unset($item['mention']);
1518                         unset($item['origin']);
1519                         unset($item['starred']);
1520                         unset($item['postopts']);
1521                         unset($item['inform']);
1522                         unset($item['post-reason']);
1523                         if ($item['uri-id'] == $item['parent-uri-id']) {
1524                                 $item['contact-id'] = $item['owner-id'];
1525                         } else {
1526                                 $item['contact-id'] = $item['author-id'];
1527                         }
1528
1529                         $public_shadow = self::insert($item, false, true);
1530
1531                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1532                 }
1533         }
1534
1535         /**
1536          * Add a shadow entry for a given item id that is a comment
1537          *
1538          * This function does the same like the function above - but for comments
1539          *
1540          * @param integer $itemid Item ID that should be added
1541          * @throws \Exception
1542          */
1543         private static function addShadowPost($itemid)
1544         {
1545                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1546                 if (!DBA::isResult($item)) {
1547                         return;
1548                 }
1549
1550                 // Is it a toplevel post?
1551                 if ($item['gravity'] == GRAVITY_PARENT) {
1552                         self::addShadow($itemid);
1553                         return;
1554                 }
1555
1556                 // Is this a shadow entry?
1557                 if ($item['uid'] == 0) {
1558                         return;
1559                 }
1560
1561                 // Is there a shadow parent?
1562                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1563                         return;
1564                 }
1565
1566                 // Is there already a shadow entry?
1567                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1568                         return;
1569                 }
1570
1571                 // Save "origin" and "parent" state
1572                 $origin = $item['origin'];
1573                 $parent = $item['parent'];
1574
1575                 // Preparing public shadow (removing user specific data)
1576                 $item['uid'] = 0;
1577                 unset($item['id']);
1578                 unset($item['parent']);
1579                 unset($item['wall']);
1580                 unset($item['mention']);
1581                 unset($item['origin']);
1582                 unset($item['starred']);
1583                 unset($item['postopts']);
1584                 unset($item['inform']);
1585                 unset($item['post-reason']);
1586                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1587
1588                 $public_shadow = self::insert($item, false, true);
1589
1590                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1591
1592                 // If this was a comment to a Diaspora post we don't get our comment back.
1593                 // This means that we have to distribute the comment by ourselves.
1594                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1595                         self::distribute($public_shadow);
1596                 }
1597         }
1598
1599         /**
1600          * Adds a language specification in a "language" element of given $arr.
1601          * Expects "body" element to exist in $arr.
1602          *
1603          * @param array $item
1604          * @return string detected language
1605          * @throws \Text_LanguageDetect_Exception
1606          */
1607         private static function getLanguage(array $item)
1608         {
1609                 if (!empty($item['language'])) {
1610                         return $item['language'];
1611                 }
1612
1613                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1614                         return '';
1615                 }
1616
1617                 // Convert attachments to links
1618                 $naked_body = BBCode::removeAttachment($item['body']);
1619                 if (empty($naked_body)) {
1620                         return '';
1621                 }
1622
1623                 // Remove links and pictures
1624                 $naked_body = BBCode::removeLinks($naked_body);
1625
1626                 // Convert the title and the body to plain text
1627                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1628
1629                 // Remove possibly remaining links
1630                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1631
1632                 if (empty($naked_body)) {
1633                         return '';
1634                 }
1635
1636                 $ld = new Language(DI::l10n()->getAvailableLanguages());
1637                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1638                 if (is_array($languages)) {
1639                         return json_encode($languages);
1640                 }
1641
1642                 return '';
1643         }
1644
1645         public static function getLanguageMessage(array $item)
1646         {
1647                 $iso639 = new \Matriphe\ISO639\ISO639;
1648
1649                 $used_languages = '';
1650                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1651                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1652                 }
1653                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1654                 return $used_languages;
1655         }
1656
1657         /**
1658          * Creates an unique guid out of a given uri
1659          *
1660          * @param string $uri uri of an item entry
1661          * @param string $host hostname for the GUID prefix
1662          * @return string unique guid
1663          */
1664         public static function guidFromUri($uri, $host)
1665         {
1666                 // Our regular guid routine is using this kind of prefix as well
1667                 // We have to avoid that different routines could accidentally create the same value
1668                 $parsed = parse_url($uri);
1669
1670                 // We use a hash of the hostname as prefix for the guid
1671                 $guid_prefix = hash("crc32", $host);
1672
1673                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1674                 unset($parsed["scheme"]);
1675
1676                 // Glue it together to be able to make a hash from it
1677                 $host_id = implode("/", $parsed);
1678
1679                 // We could use any hash algorithm since it isn't a security issue
1680                 $host_hash = hash("ripemd128", $host_id);
1681
1682                 return $guid_prefix.$host_hash;
1683         }
1684
1685         /**
1686          * generate an unique URI
1687          *
1688          * @param integer $uid  User id
1689          * @param string  $guid An existing GUID (Otherwise it will be generated)
1690          *
1691          * @return string
1692          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1693          */
1694         public static function newURI($uid, $guid = "")
1695         {
1696                 if ($guid == "") {
1697                         $guid = System::createUUID();
1698                 }
1699
1700                 return DI::baseUrl()->get() . '/objects/' . $guid;
1701         }
1702
1703         /**
1704          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1705          *
1706          * This can be used to filter for inactive contacts.
1707          * Only do this for public postings to avoid privacy problems, since poco data is public.
1708          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1709          *
1710          * @param array $arr Contains the just posted item record
1711          * @throws \Exception
1712          */
1713         private static function updateContact($arr)
1714         {
1715                 // Unarchive the author
1716                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1717                 if (DBA::isResult($contact)) {
1718                         Contact::unmarkForArchival($contact);
1719                 }
1720
1721                 // Unarchive the contact if it's not our own contact
1722                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1723                 if (DBA::isResult($contact)) {
1724                         Contact::unmarkForArchival($contact);
1725                 }
1726
1727                 /// @todo On private posts we could obfuscate the date
1728                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1729
1730                 // Is it a forum? Then we don't care about the rules from above
1731                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1732                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1733                                 $update = true;
1734                         }
1735                 }
1736
1737                 if ($update) {
1738                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1739                         // So we have to ensure to only update the last item when it had been our own post,
1740                         // or it had been done by a "regular" contact.
1741                         if (!empty($arr['wall'])) {
1742                                 $condition = ['id' => $arr['contact-id']];
1743                         } else {
1744                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1745                         }
1746                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1747                 }
1748                 // Now do the same for the system wide contacts with uid=0
1749                 if ($arr['private'] != self::PRIVATE) {
1750                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1751                                 ['id' => $arr['owner-id']]);
1752
1753                         if ($arr['owner-id'] != $arr['author-id']) {
1754                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1755                                         ['id' => $arr['author-id']]);
1756                         }
1757                 }
1758         }
1759
1760         public static function setHashtags($body)
1761         {
1762                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1763                         $tags = BBCode::getTags($body);
1764
1765                         // No hashtags?
1766                         if (!count($tags)) {
1767                                 return $body;
1768                         }
1769
1770                         // This sorting is important when there are hashtags that are part of other hashtags
1771                         // Otherwise there could be problems with hashtags like #test and #test2
1772                         // Because of this we are sorting from the longest to the shortest tag.
1773                         usort($tags, function ($a, $b) {
1774                                 return strlen($b) <=> strlen($a);
1775                         });
1776
1777                         $URLSearchString = "^\[\]";
1778
1779                         // All hashtags should point to the home server if "local_tags" is activated
1780                         if (DI::config()->get('system', 'local_tags')) {
1781                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1782                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1783                         }
1784
1785                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1786                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1787                                 function ($match) {
1788                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1789                                 }, $body);
1790
1791                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1792                                 function ($match) {
1793                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1794                                 }, $body);
1795
1796                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1797                                 function ($match) {
1798                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1799                                 }, $body);
1800
1801                         // Repair recursive urls
1802                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1803                                 "&num;$2", $body);
1804
1805                         foreach ($tags as $tag) {
1806                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1807                                         continue;
1808                                 }
1809
1810                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1811                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1812
1813                                 $body = str_replace($tag, $newtag, $body);
1814                         }
1815
1816                         // Convert back the masked hashtags
1817                         $body = str_replace("&num;", "#", $body);
1818
1819                         return $body;
1820                 });
1821
1822                 return $body;
1823         }
1824
1825         /**
1826          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1827          *
1828          * @param int $uid
1829          * @param int $item_id
1830          * @return boolean true if item was deleted, else false
1831          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1832          * @throws \ImagickException
1833          */
1834         private static function tagDeliver($uid, $item_id)
1835         {
1836                 $mention = false;
1837
1838                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
1839                 if (!DBA::isResult($user)) {
1840                         return false;
1841                 }
1842
1843                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
1844                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
1845
1846                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
1847                 if (!DBA::isResult($item)) {
1848                         return false;
1849                 }
1850
1851                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
1852
1853                 /*
1854                  * Diaspora uses their own hardwired link URL in @-tags
1855                  * instead of the one we supply with webfinger
1856                  */
1857                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
1858
1859                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1860                 if ($cnt) {
1861                         foreach ($matches as $mtch) {
1862                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
1863                                         $mention = true;
1864                                         Logger::log('mention found: ' . $mtch[2]);
1865                                 }
1866                         }
1867                 }
1868
1869                 if (!$mention) {
1870                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1871                         foreach ($tags as $tag) {
1872                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
1873                                         $mention = true;
1874                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
1875                                 }
1876                         }
1877                 }
1878
1879                 if (!$mention) {
1880                         if (($community_page || $prvgroup) &&
1881                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
1882                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item['id'], 'guid'=> $item['guid']]);
1883                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1884                                 return true;
1885                         }
1886                         return false;
1887                 }
1888
1889                 $arr = ['item' => $item, 'user' => $user];
1890
1891                 Hook::callAll('tagged', $arr);
1892
1893                 if (!$community_page && !$prvgroup) {
1894                         return false;
1895                 }
1896
1897                 /*
1898                  * tgroup delivery - setup a second delivery chain
1899                  * prevent delivery looping - only proceed
1900                  * if the message originated elsewhere and is a top-level post
1901                  */
1902                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1903                         return false;
1904                 }
1905
1906                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1907                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1908                 if (!DBA::isResult($self)) {
1909                         return false;
1910                 }
1911
1912                 $owner_id = Contact::getIdForURL($self['url']);
1913
1914                 // also reset all the privacy bits to the forum default permissions
1915
1916                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
1917
1918                 $psid = PermissionSet::getIdFromACL(
1919                         $user['uid'],
1920                         $user['allow_cid'],
1921                         $user['allow_gid'],
1922                         $user['deny_cid'],
1923                         $user['deny_gid']
1924                 );
1925
1926                 $forum_mode = ($prvgroup ? 2 : 1);
1927
1928                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1929                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
1930                 self::update($fields, ['id' => $item['id']]);
1931
1932                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, (int)$item['uri-id'], (int)$item['uid']);
1933
1934                 self::performActivity($item['id'], 'announce', $uid);
1935
1936                 return false;
1937         }
1938
1939         /**
1940          * Automatically reshare the item if the "remote_self" option is selected
1941          *
1942          * @param array $item
1943          * @return void
1944          */
1945         private static function autoReshare(array $item)
1946         {
1947                 if ($item['gravity'] != GRAVITY_PARENT) {
1948                         return;
1949                 }
1950
1951                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
1952                         return;
1953                 }
1954
1955                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1956                         return;
1957                 }
1958
1959                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1960
1961                 self::performActivity($item['id'], 'announce', $item['uid']);
1962         }
1963
1964         public static function isRemoteSelf($contact, &$datarray)
1965         {
1966                 if (!$contact['remote_self']) {
1967                         return false;
1968                 }
1969
1970                 // Prevent the forwarding of posts that are forwarded
1971                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
1972                         Logger::info('Already forwarded');
1973                         return false;
1974                 }
1975
1976                 // Prevent to forward already forwarded posts
1977                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
1978                         Logger::info('Already forwarded (second test)');
1979                         return false;
1980                 }
1981
1982                 // Only forward posts
1983                 if ($datarray["verb"] != Activity::POST) {
1984                         Logger::info('No post');
1985                         return false;
1986                 }
1987
1988                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
1989                         Logger::info('Not public');
1990                         return false;
1991                 }
1992
1993                 $datarray2 = $datarray;
1994                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
1995                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
1996                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
1997                                         ['uid' => $contact['uid'], 'self' => true]);
1998                         if (DBA::isResult($self)) {
1999                                 $datarray['contact-id'] = $self["id"];
2000
2001                                 $datarray['owner-name'] = $self["name"];
2002                                 $datarray['owner-link'] = $self["url"];
2003                                 $datarray['owner-avatar'] = $self["thumb"];
2004
2005                                 $datarray['author-name']   = $datarray['owner-name'];
2006                                 $datarray['author-link']   = $datarray['owner-link'];
2007                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2008
2009                                 unset($datarray['edited']);
2010
2011                                 unset($datarray['network']);
2012                                 unset($datarray['owner-id']);
2013                                 unset($datarray['author-id']);
2014                         }
2015
2016                         if ($contact['network'] != Protocol::FEED) {
2017                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2018                                 $datarray["guid"] = System::createUUID();
2019                                 unset($datarray["plink"]);
2020                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2021                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2022                                 $datarray["extid"] = Protocol::DFRN;
2023                                 $urlpart = parse_url($datarray2['author-link']);
2024                                 $datarray["app"] = $urlpart["host"];
2025                                 if (!empty($old_uri_id)) {
2026                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2027                                 }
2028
2029                                 unset($datarray["parent-uri"]);
2030                                 unset($datarray["thr-parent"]);
2031                         } else {
2032                                 $datarray['private'] = self::PUBLIC;
2033                         }
2034                 }
2035
2036                 if ($contact['network'] != Protocol::FEED) {
2037                         // Store the original post
2038                         $result = self::insert($datarray2);
2039                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2040                 } else {
2041                         $datarray["app"] = "Feed";
2042                         $result = true;
2043                 }
2044
2045                 return (bool)$result;
2046         }
2047
2048         /**
2049          *
2050          * @param string $s
2051          * @param int    $uid
2052          * @param array  $item
2053          * @param int    $cid
2054          * @return string
2055          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2056          * @throws \ImagickException
2057          */
2058         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2059         {
2060                 if (DI::config()->get('system', 'disable_embedded')) {
2061                         return $s;
2062                 }
2063
2064                 Logger::info('check for photos');
2065                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2066
2067                 $orig_body = $s;
2068                 $new_body = '';
2069
2070                 $img_start = strpos($orig_body, '[img');
2071                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2072                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2073
2074                 while (($img_st_close !== false) && ($img_len !== false)) {
2075                         $img_st_close++; // make it point to AFTER the closing bracket
2076                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2077
2078                         Logger::info('found photo', ['image' => $image]);
2079
2080                         if (stristr($image, $site . '/photo/')) {
2081                                 // Only embed locally hosted photos
2082                                 $replace = false;
2083                                 $i = basename($image);
2084                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2085                                 $x = strpos($i, '-');
2086
2087                                 if ($x) {
2088                                         $res = substr($i, $x + 1);
2089                                         $i = substr($i, 0, $x);
2090                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2091                                         if (DBA::isResult($photo)) {
2092                                                 /*
2093                                                  * Check to see if we should replace this photo link with an embedded image
2094                                                  * 1. No need to do so if the photo is public
2095                                                  * 2. If there's a contact-id provided, see if they're in the access list
2096                                                  *    for the photo. If so, embed it.
2097                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2098                                                  *    permissions, regardless of order but first check to see if they're an exact
2099                                                  *    match to save some processing overhead.
2100                                                  */
2101                                                 if (self::hasPermissions($photo)) {
2102                                                         if ($cid) {
2103                                                                 $recips = self::enumeratePermissions($photo);
2104                                                                 if (in_array($cid, $recips)) {
2105                                                                         $replace = true;
2106                                                                 }
2107                                                         } elseif ($item) {
2108                                                                 if (self::samePermissions($uid, $item, $photo)) {
2109                                                                         $replace = true;
2110                                                                 }
2111                                                         }
2112                                                 }
2113                                                 if ($replace) {
2114                                                         $photo_img = Photo::getImageForPhoto($photo);
2115                                                         // If a custom width and height were specified, apply before embedding
2116                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2117                                                                 Logger::info('scaling photo');
2118
2119                                                                 $width = intval($match[1]);
2120                                                                 $height = intval($match[2]);
2121
2122                                                                 $photo_img->scaleDown(max($width, $height));
2123                                                         }
2124
2125                                                         $data = $photo_img->asString();
2126                                                         $type = $photo_img->getType();
2127
2128                                                         Logger::info('replacing photo');
2129                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2130                                                         Logger::debug('replaced', ['image' => $image]);
2131                                                 }
2132                                         }
2133                                 }
2134                         }
2135
2136                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2137                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2138                         if ($orig_body === false) {
2139                                 $orig_body = '';
2140                         }
2141
2142                         $img_start = strpos($orig_body, '[img');
2143                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2144                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2145                 }
2146
2147                 $new_body = $new_body . $orig_body;
2148
2149                 return $new_body;
2150         }
2151
2152         private static function hasPermissions($obj)
2153         {
2154                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2155                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2156         }
2157
2158         private static function samePermissions($uid, $obj1, $obj2)
2159         {
2160                 // first part is easy. Check that these are exactly the same.
2161                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2162                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2163                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2164                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2165                         return true;
2166                 }
2167
2168                 // This is harder. Parse all the permissions and compare the resulting set.
2169                 $recipients1 = self::enumeratePermissions($obj1);
2170                 $recipients2 = self::enumeratePermissions($obj2);
2171                 sort($recipients1);
2172                 sort($recipients2);
2173
2174                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2175                 return ($recipients1 == $recipients2);
2176         }
2177
2178         /**
2179          * Returns an array of contact-ids that are allowed to see this object
2180          *
2181          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2182          * @param bool  $check_dead Prunes unavailable contacts from the result
2183          * @return array
2184          * @throws \Exception
2185          */
2186         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2187         {
2188                 $aclFormater = DI::aclFormatter();
2189
2190                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2191                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2192                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2193                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2194                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2195                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2196                 $recipients   = array_diff($recipients, $deny);
2197                 return $recipients;
2198         }
2199
2200         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2201         {
2202                 if (!$uid || ($days < 1)) {
2203                         return;
2204                 }
2205
2206                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2207                         $uid, GRAVITY_PARENT];
2208
2209                 /*
2210                  * $expire_network_only = save your own wall posts
2211                  * and just expire conversations started by others
2212                  */
2213                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2214
2215                 if ($expire_network_only) {
2216                         $condition[0] .= " AND NOT `wall`";
2217                 }
2218
2219                 if ($network != "") {
2220                         $condition[0] .= " AND `network` = ?";
2221                         $condition[] = $network;
2222                 }
2223
2224                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2225                 $condition[] = $days;
2226
2227                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2228
2229                 if (!DBA::isResult($items)) {
2230                         return;
2231                 }
2232
2233                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2234
2235                 // Forcing expiring of items - but not notes and marked items
2236                 if ($force) {
2237                         $expire_items = true;
2238                 }
2239
2240                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2241                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2242                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2243
2244                 $expired = 0;
2245
2246                 $priority = DI::config()->get('system', 'expire-notify-priority');
2247
2248                 while ($item = Post::fetch($items)) {
2249                         // don't expire filed items
2250                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2251                                 continue;
2252                         }
2253
2254                         // Only expire posts, not photos and photo comments
2255
2256                         if (!$expire_photos && !empty($item['resource-id'])) {
2257                                 continue;
2258                         } elseif (!$expire_starred && intval($item['starred'])) {
2259                                 continue;
2260                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2261                                 continue;
2262                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2263                                 continue;
2264                         }
2265
2266                         self::markForDeletionById($item['id'], $priority);
2267
2268                         ++$expired;
2269                 }
2270                 DBA::close($items);
2271                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2272         }
2273
2274         public static function firstPostDate($uid, $wall = false)
2275         {
2276                 $user = User::getById($uid, ['register_date']);
2277                 if (empty($user)) {
2278                         return false;
2279                 }
2280
2281                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2282                         $uid, $wall, $user['register_date']];
2283                 $params = ['order' => ['received' => false]];
2284                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2285                 if (DBA::isResult($thread)) {
2286                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2287                         return $postdate;
2288                 }
2289                 return false;
2290         }
2291
2292         /**
2293          * add/remove activity to an item
2294          *
2295          * Toggle activities as like,dislike,attend of an item
2296          *
2297          * @param int $item_id
2298          * @param string $verb
2299          *            Activity verb. One of
2300          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2301          *            attendno, unattendno, attendmaybe, unattendmaybe,
2302          *            announce, unannouce
2303          * @return bool
2304          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2305          * @throws \ImagickException
2306          * @hook  'post_local_end'
2307          *            array $arr
2308          *            'post_id' => ID of posted item
2309          */
2310         public static function performActivity(int $item_id, string $verb, int $uid)
2311         {
2312                 if (empty($uid)) {
2313                         return false;
2314                 }
2315
2316                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2317
2318                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2319                 if (!DBA::isResult($item)) {
2320                         Logger::log('like: unknown item ' . $item_id);
2321                         return false;
2322                 }
2323
2324                 $uri_id = $item['uri-id'];
2325
2326                 if (!in_array($item['uid'], [0, $uid])) {
2327                         return false;
2328                 }
2329
2330                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2331                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2332                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2333                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2334                                 if (!DBA::isResult($item)) {
2335                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2336                                         return false;
2337                                 }
2338                         }
2339                 }
2340
2341                 // Retrieves the local post owner
2342                 $owner = User::getOwnerDataById($uid);
2343                 if (empty($owner)) {
2344                         Logger::info('Empty owner for user', ['uid' => $uid]);
2345                         return false;
2346                 }
2347
2348                 // Retrieve the current logged in user's public contact
2349                 $author_id = Contact::getIdForURL($owner['url']);
2350                 if (empty($author_id)) {
2351                         Logger::info('Empty public contact');
2352                         return false;
2353                 }
2354
2355                 $activity = null;
2356                 switch ($verb) {
2357                         case 'like':
2358                         case 'unlike':
2359                                 $activity = Activity::LIKE;
2360                                 break;
2361                         case 'dislike':
2362                         case 'undislike':
2363                                 $activity = Activity::DISLIKE;
2364                                 break;
2365                         case 'attendyes':
2366                         case 'unattendyes':
2367                                 $activity = Activity::ATTEND;
2368                                 break;
2369                         case 'attendno':
2370                         case 'unattendno':
2371                                 $activity = Activity::ATTENDNO;
2372                                 break;
2373                         case 'attendmaybe':
2374                         case 'unattendmaybe':
2375                                 $activity = Activity::ATTENDMAYBE;
2376                                 break;
2377                         case 'follow':
2378                         case 'unfollow':
2379                                 $activity = Activity::FOLLOW;
2380                                 break;
2381                         case 'announce':
2382                         case 'unannounce':
2383                                 $activity = Activity::ANNOUNCE;
2384                                 break;
2385                         default:
2386                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2387                                 return false;
2388                 }
2389
2390                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2391
2392                 // Enable activity toggling instead of on/off
2393                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2394
2395                 // Look for an existing verb row
2396                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2397                 if ($event_verb_flag) {
2398                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2399
2400                         // Translate to the index based activity index
2401                         $vids = [];
2402                         foreach ($verbs as $verb) {
2403                                 $vids[] = Verb::getID($verb);
2404                         }
2405                 } else {
2406                         $vids = Verb::getID($activity);
2407                 }
2408
2409                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2410                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2411                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2412
2413                 if (DBA::isResult($like_item)) {
2414                         /**
2415                          * Truth table for existing activities
2416                          *
2417                          * |          Inputs            ||      Outputs      |
2418                          * |----------------------------||-------------------|
2419                          * |  Mode  | Event | Same verb || Delete? | Return? |
2420                          * |--------|-------|-----------||---------|---------|
2421                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2422                          * | create |  Yes  |    No     ||   Yes   |   No    |
2423                          * | create |  No   |    Yes    ||   No    |   Yes   |
2424                          * | create |  No   |    No     ||        N/A†       |
2425                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2426                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2427                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2428                          * | delete |  No   |    No     ||        N/A†       |
2429                          * |--------|-------|-----------||---------|---------|
2430                          * |   A    |   B   |     C     || A xor C | !B or C |
2431                          *
2432                          * † Can't happen: It's impossible to find an existing non-event activity without
2433                          *                 the same verb because we are only looking for this single verb.
2434                          *
2435                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2436                          */
2437                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2438                                 self::markForDeletionById($like_item['id']);
2439                         }
2440
2441                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2442                                 return true;
2443                         }
2444                 }
2445
2446                 // No need to go further if we aren't creating anything
2447                 if ($mode == 'delete') {
2448                         return true;
2449                 }
2450
2451                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2452
2453                 $new_item = [
2454                         'guid'          => System::createUUID(),
2455                         'uri'           => self::newURI($item['uid']),
2456                         'uid'           => $item['uid'],
2457                         'contact-id'    => $owner['id'],
2458                         'wall'          => $item['wall'],
2459                         'origin'        => 1,
2460                         'network'       => Protocol::DFRN,
2461                         'protocol'      => Conversation::PARCEL_DIRECT,
2462                         'direction'     => Conversation::PUSH,
2463                         'gravity'       => GRAVITY_ACTIVITY,
2464                         'parent'        => $item['id'],
2465                         'thr-parent'    => $item['uri'],
2466                         'owner-id'      => $author_id,
2467                         'author-id'     => $author_id,
2468                         'body'          => $activity,
2469                         'verb'          => $activity,
2470                         'object-type'   => $objtype,
2471                         'allow_cid'     => $item['allow_cid'],
2472                         'allow_gid'     => $item['allow_gid'],
2473                         'deny_cid'      => $item['deny_cid'],
2474                         'deny_gid'      => $item['deny_gid'],
2475                         'visible'       => 1,
2476                         'unseen'        => 1,
2477                 ];
2478
2479                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2480                 if (!empty($signed)) {
2481                         $new_item['diaspora_signed_text'] = json_encode($signed);
2482                 }
2483
2484                 $new_item_id = self::insert($new_item);
2485
2486                 // If the parent item isn't visible then set it to visible
2487                 if (!$item['visible']) {
2488                         self::update(['visible' => true], ['id' => $item['id']]);
2489                 }
2490
2491                 $new_item['id'] = $new_item_id;
2492
2493                 Hook::callAll('post_local_end', $new_item);
2494
2495                 return true;
2496         }
2497
2498         /**
2499          * Fetch the SQL condition for the given user id
2500          *
2501          * @param integer $owner_id User ID for which the permissions should be fetched
2502          * @return array condition
2503          */
2504         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2505         {
2506                 $local_user = local_user();
2507                 $remote_user = Session::getRemoteContactID($owner_id);
2508
2509                 // default permissions - anonymous user
2510                 $condition = ["`private` != ?", self::PRIVATE];
2511
2512                 if ($local_user && ($local_user == $owner_id)) {
2513                         // Profile owner - everything is visible
2514                         $condition = [];
2515                 } elseif ($remote_user) {
2516                          // Authenticated visitor - fetch the matching permissionsets
2517                         $set = PermissionSet::get($owner_id, $remote_user);
2518                         if (!empty($set)) {
2519                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2520                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2521                                         self::PRIVATE, self::PRIVATE];
2522                                 $condition = array_merge($condition, $set);
2523                         }
2524                 }
2525
2526                 return $condition;
2527         }
2528
2529         /**
2530          * Get a permission SQL string for the given user
2531          *
2532          * @param int $owner_id
2533          * @param string $table
2534          * @return string
2535          */
2536         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2537         {
2538                 $local_user = local_user();
2539                 $remote_user = Session::getRemoteContactID($owner_id);
2540
2541                 if (!empty($table)) {
2542                         $table = DBA::quoteIdentifier($table) . '.';
2543                 }
2544
2545                 /*
2546                  * Construct permissions
2547                  *
2548                  * default permissions - anonymous user
2549                  */
2550                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2551
2552                 // Profile owner - everything is visible
2553                 if ($local_user && ($local_user == $owner_id)) {
2554                         $sql = '';
2555                 } elseif ($remote_user) {
2556                         /*
2557                          * Authenticated visitor. Unless pre-verified,
2558                          * check that the contact belongs to this $owner_id
2559                          * and load the groups the visitor belongs to.
2560                          * If pre-verified, the caller is expected to have already
2561                          * done this and passed the groups into this function.
2562                          */
2563                         $set = PermissionSet::get($owner_id, $remote_user);
2564
2565                         if (!empty($set)) {
2566                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
2567                         } else {
2568                                 $sql_set = '';
2569                         }
2570
2571                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2572                 }
2573
2574                 return $sql;
2575         }
2576
2577         /**
2578          * get translated item type
2579          *
2580          * @param array                $item
2581          * @param \Friendica\Core\L10n $l10n
2582          * @return string
2583          */
2584         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2585         {
2586                 if (!empty($item['event-id'])) {
2587                         return $l10n->t('event');
2588                 } elseif (!empty($item['resource-id'])) {
2589                         return $l10n->t('photo');
2590                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2591                         return $l10n->t('activity');
2592                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2593                         return $l10n->t('comment');
2594                 }
2595
2596                 return $l10n->t('post');
2597         }
2598
2599         /**
2600          * Sets the "rendered-html" field of the provided item
2601          *
2602          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2603          *
2604          * @param array $item
2605          *
2606          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2607          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2608          */
2609         public static function putInCache(&$item)
2610         {
2611                 // Save original body to prevent addons to modify it
2612                 $body = $item['body'];
2613
2614                 $rendered_hash = $item['rendered-hash'] ?? '';
2615                 $rendered_html = $item['rendered-html'] ?? '';
2616
2617                 if ($rendered_hash == ''
2618                         || $rendered_html == ''
2619                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2620                         || DI::config()->get('system', 'ignore_cache')
2621                 ) {
2622                         self::addRedirToImageTags($item);
2623
2624                         $item['rendered-html'] = BBCode::convert($item['body']);
2625                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2626
2627                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2628                         Hook::callAll('put_item_in_cache', $hook_data);
2629                         $item['rendered-html'] = $hook_data['rendered-html'];
2630                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2631                         unset($hook_data);
2632
2633                         // Update if the generated values differ from the existing ones
2634                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2635                                 self::update(
2636                                         [
2637                                                 'rendered-html' => $item['rendered-html'],
2638                                                 'rendered-hash' => $item['rendered-hash']
2639                                         ],
2640                                         ['id' => $item['id']]
2641                                 );
2642                         }
2643                 }
2644
2645                 $item['body'] = $body;
2646         }
2647
2648         /**
2649          * Find any non-embedded images in private items and add redir links to them
2650          *
2651          * @param array &$item The field array of an item row
2652          */
2653         private static function addRedirToImageTags(array &$item)
2654         {
2655                 $app = DI::app();
2656
2657                 $matches = [];
2658                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2659                 if ($cnt) {
2660                         foreach ($matches as $mtch) {
2661                                 if (strpos($mtch[1], '/redir') !== false) {
2662                                         continue;
2663                                 }
2664
2665                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
2666                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2667                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2668                                 }
2669                         }
2670                 }
2671         }
2672
2673         /**
2674          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2675          * If attach is true, also add icons for item attachments.
2676          *
2677          * @param array   $item
2678          * @param boolean $attach
2679          * @param boolean $is_preview
2680          * @return string item body html
2681          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2682          * @throws \ImagickException
2683          * @hook  prepare_body_init item array before any work
2684          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2685          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2686          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2687          */
2688         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2689         {
2690                 $a = DI::app();
2691                 Hook::callAll('prepare_body_init', $item);
2692
2693                 // In order to provide theme developers more possibilities, event items
2694                 // are treated differently.
2695                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2696                         $ev = Event::getItemHTML($item);
2697                         return $ev;
2698                 }
2699
2700                 $tags = Tag::populateFromItem($item);
2701
2702                 $item['tags'] = $tags['tags'];
2703                 $item['hashtags'] = $tags['hashtags'];
2704                 $item['mentions'] = $tags['mentions'];
2705
2706                 // Compile eventual content filter reasons
2707                 $filter_reasons = [];
2708                 if (!$is_preview && public_contact() != $item['author-id']) {
2709                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2710                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2711                         }
2712
2713                         $hook_data = [
2714                                 'item' => $item,
2715                                 'filter_reasons' => $filter_reasons
2716                         ];
2717                         Hook::callAll('prepare_body_content_filter', $hook_data);
2718                         $filter_reasons = $hook_data['filter_reasons'];
2719                         unset($hook_data);
2720                 }
2721
2722                 $body = $item['body'] ?? '';
2723                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2724                 self::putInCache($item);
2725                 $item['body'] = $body;
2726                 $s = $item["rendered-html"];
2727
2728                 $hook_data = [
2729                         'item' => $item,
2730                         'html' => $s,
2731                         'preview' => $is_preview,
2732                         'filter_reasons' => $filter_reasons
2733                 ];
2734                 Hook::callAll('prepare_body', $hook_data);
2735                 $s = $hook_data['html'];
2736                 unset($hook_data);
2737
2738                 if (!$attach) {
2739                         // Replace the blockquotes with quotes that are used in mails.
2740                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2741                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2742                         return $s;
2743                 }
2744
2745                 $shared = BBCode::fetchShareAttributes($item['body']);
2746                 if (!empty($shared['guid'])) {
2747                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2748                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2749                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2750                         $attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2751                         $s = self::addVisualAttachments($attachments, $item, $s, true);
2752                         $s = self::addLinkAttachment($attachments, $body, $s, true, []);
2753                         $s = self::addNonVisualAttachments($attachments, $item, $s, true);
2754                         $shared_links = array_merge($shared_links, array_column($attachments['visual'], 'url'));
2755                         $shared_links = array_merge($shared_links, array_column($attachments['link'], 'url'));
2756                         $shared_links = array_merge($shared_links, array_column($attachments['additional'], 'url'));
2757                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2758                 } else {
2759                         $shared_uri_id = 0;
2760                         $shared_links = [];
2761                 }
2762
2763                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links);
2764                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2765                 $s = self::addLinkAttachment($attachments, $body, $s, false, $shared_links);
2766                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2767
2768                 // Map.
2769                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2770                         $x = Map::byCoordinates(trim($item['coord']));
2771                         if ($x) {
2772                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2773                         }
2774                 }
2775
2776                 // Replace friendica image url size with theme preference.
2777                 if (!empty($a->theme_info['item_image_size'])) {
2778                         $ps = $a->theme_info['item_image_size'];
2779                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2780                 }
2781
2782                 $s = HTML::applyContentFilter($s, $filter_reasons);
2783
2784                 $hook_data = ['item' => $item, 'html' => $s];
2785                 Hook::callAll('prepare_body_final', $hook_data);
2786
2787                 return $hook_data['html'];
2788         }
2789
2790         /**
2791          * Check if the body contains a link
2792          *
2793          * @param string $body
2794          * @param string $url
2795          * @param int    $type
2796          * @return bool
2797          */
2798         public static function containsLink(string $body, string $url, int $type = 0)
2799         {
2800                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2801                 $urlparts = parse_url($url);
2802                 unset($urlparts['query']);
2803                 unset($urlparts['fragment']);
2804                 $url = Network::unparseURL($urlparts);
2805
2806                 // Remove media links to only search in embedded content
2807                 // @todo Check images for image link, audio for audio links, ...
2808                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2809                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2810                 }
2811
2812                 if (strpos($body, $url)) {
2813                         return true;
2814                 }
2815                 foreach ([0, 1, 2] as $size) {
2816                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2817                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2818                                 return true;
2819                         }
2820                 }
2821                 return false;
2822         }
2823
2824         /**
2825          * Add visual attachments to the content
2826          *
2827          * @param array $attachments
2828          * @param array $item
2829          * @param string $content
2830          * @return string modified content
2831          */
2832         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2833         {
2834                 $stamp1 = microtime(true);
2835                 $leading = '';
2836                 $trailing = '';
2837
2838                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2839                 foreach ($attachments['visual'] as $attachment) {
2840                         if (self::containsLink($item['body'], $attachment['url'], $attachment['type'])) {
2841                                 continue;
2842                         }
2843
2844                         $author = ['uid' => 0, 'id' => $item['author-id'],
2845                                 'network' => $item['author-network'], 'url' => $item['author-link']];
2846                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
2847
2848                         if (!empty($attachment['preview'])) {
2849                                 $preview_url = Proxy::proxifyUrl(Contact::magicLinkByContact($author, $attachment['preview']));
2850                         } else {
2851                                 $preview_url = '';
2852                         }
2853
2854                         if (($attachment['filetype'] == 'video')) {
2855                                 /// @todo Move the template to /content as well
2856                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2857                                         '$video' => [
2858                                                 'id'      => $attachment['id'],
2859                                                 'src'     => $the_url,
2860                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2861                                                 'preview' => $preview_url,
2862                                                 'mime'    => $attachment['mimetype'],
2863                                         ],
2864                                 ]);
2865                                 if ($item['post-type'] == Item::PT_VIDEO) {
2866                                         $leading .= $media;
2867                                 } else {
2868                                         $trailing .= $media;
2869                                 }
2870                         } elseif ($attachment['filetype'] == 'audio') {
2871                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2872                                         '$audio' => [
2873                                                 'id'     => $attachment['id'],
2874                                                 'src'    => $the_url,
2875                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2876                                                 'mime'   => $attachment['mimetype'],
2877                                         ],
2878                                 ]);
2879                                 if ($item['post-type'] == Item::PT_AUDIO) {
2880                                         $leading .= $media;
2881                                 } else {
2882                                         $trailing .= $media;
2883                                 }
2884                         } elseif ($attachment['filetype'] == 'image') {
2885                                 if (empty($preview_url) && (max($attachment['width'], $attachment['height']) > 600)) {
2886                                         $preview_url = Proxy::proxifyUrl($the_url, false, ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
2887                                 }
2888                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2889                                         '$image' => [
2890                                                 'src'    => Proxy::proxifyUrl($the_url),
2891                                                 'preview' => $preview_url,
2892                                                 'attachment'   => $attachment,
2893                                         ],
2894                                 ]);
2895                                 // On Diaspora posts the attached pictures are leading
2896                                 if ($item['network'] == Protocol::DIASPORA) {
2897                                         $leading .= $media;
2898                                 } else {
2899                                         $trailing .= $media;
2900                                 }
2901                         }
2902                 }
2903
2904                 if ($shared) {
2905                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
2906                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
2907                 } else {
2908                         if ($leading != '') {
2909                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
2910                         }
2911
2912                         if ($trailing != '') {
2913                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
2914                         }
2915                 }
2916
2917                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
2918                 return $content;
2919         }
2920
2921         /**
2922          * Add link attachment to the content
2923          *
2924          * @param array  $attachments
2925          * @param string $body
2926          * @param string $content
2927          * @param bool   $shared
2928          * @param array  $ignore_links A list of URLs to ignore
2929          * @return string modified content
2930          */
2931         private static function addLinkAttachment(array $attachments, string $body, string $content, bool $shared, array $ignore_links)
2932         {
2933                 $stamp1 = microtime(true);
2934                 // @ToDo Check only for audio and video
2935                 $preview = empty($attachments['visual']);
2936
2937                 if (!empty($attachments['link'])) {
2938                         foreach ($attachments['link'] as $link) {
2939                                 $found = false;
2940                                 foreach ($ignore_links as $ignore_link) {
2941                                         if (Strings::compareLink($link['url'], $ignore_link)) {
2942                                                 $found = true;
2943                                         }
2944                                 }
2945                                 // @todo Judge between the links to use the one with most information
2946                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
2947                                         (empty($attachment['name']) && !empty($link['name'])) ||
2948                                         (empty($attachment['description']) && !empty($link['description'])) ||
2949                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
2950                                         $attachment = $link;
2951                                 }
2952                         }
2953                 }
2954
2955                 if (!empty($attachment)) {
2956                         $data = [
2957                                 'after' => '',
2958                                 'author_name' => $attachment['author-name'] ?? '',
2959                                 'author_url' =>  $attachment['author-url'] ?? '',
2960                                 'description' => $attachment['description'] ?? '',
2961                                 'image' => '',
2962                                 'preview' => '',
2963                                 'provider_name' => $attachment['publisher-name'] ?? '',
2964                                 'provider_url' => $attachment['publisher-url'] ?? '',
2965                                 'text' => '',
2966                                 'title' => $attachment['name'] ?? '',
2967                                 'type' => 'link',
2968                                 'url' => $attachment['url']];
2969
2970                         if ($preview) {
2971                                 if ($attachment['preview-width'] >= 500) {
2972                                         $data['image'] = $attachment['preview'] ?? '';
2973                                 } else {
2974                                         $data['preview'] = $attachment['preview'] ?? '';
2975                                 }
2976                         }
2977
2978                         if (!empty($data['description']) && !empty($content)) {
2979                                 similar_text($data['description'], $content, $percent);
2980                         } else {
2981                                 $percent = 0;
2982                         }
2983
2984                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
2985                                 $data['description'] = '';
2986                         }
2987
2988                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
2989                                 $data['author_name'] = '';
2990                         }
2991
2992                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
2993                                 $data['author_url'] = '';
2994                         }
2995                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
2996                         $data = BBCode::getAttachmentData($match[1]);
2997                 }
2998                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
2999
3000                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3001                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3002                                 $parts = parse_url($data['url']);
3003                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3004                                         if (empty($data['provider_name'])) {
3005                                                 $data['provider_name'] = $parts['host'];
3006                                         }
3007                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3008                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3009
3010                                                 if (!empty($parts['port'])) {
3011                                                         $data['provider_url'] .= ':' . $parts['port'];
3012                                                 }
3013                                         }
3014                                 }
3015
3016                                 // @todo Use a template
3017                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data);
3018                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3019                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3020                                         '$url'  => $data['url'],
3021                                         '$title' => $data['title'],
3022                                 ]);
3023                         } else {
3024                                 return $content;
3025                         }
3026
3027                         if ($shared) {
3028                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3029                         } else {
3030                                 return $content . $rendered;
3031                         }
3032                 }
3033                 return $content;
3034         }
3035
3036         /**
3037          * Add non visual attachments to the content
3038          *
3039          * @param array $attachments
3040          * @param array $item
3041          * @param string $content
3042          * @return string modified content
3043          */
3044         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3045         {
3046                 $stamp1 = microtime(true);
3047                 $trailing = '';
3048                 foreach ($attachments['additional'] as $attachment) {
3049                         if (strpos($item['body'], $attachment['url'])) {
3050                                 continue;
3051                         }
3052
3053                         $author = ['uid' => 0, 'id' => $item['author-id'],
3054                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3055                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3056
3057                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3058
3059                         if (!empty($attachment['size'])) {
3060                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3061                         }
3062
3063                         /// @todo Use a template
3064                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3065                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3066                 }
3067
3068                 if ($trailing != '') {
3069                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3070                 }
3071
3072                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
3073                 return $content;
3074         }
3075
3076         /**
3077          * get private link for item
3078          *
3079          * @param array $item
3080          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3081          * @throws \Exception
3082          */
3083         public static function getPlink($item)
3084         {
3085                 if (local_user()) {
3086                         $ret = [
3087                                 'href' => "display/" . $item['guid'],
3088                                 'orig' => "display/" . $item['guid'],
3089                                 'title' => DI::l10n()->t('View on separate page'),
3090                                 'orig_title' => DI::l10n()->t('View on separate page'),
3091                         ];
3092
3093                         if (!empty($item['plink'])) {
3094                                 $ret['href'] = DI::baseUrl()->remove($item['plink']);
3095                                 $ret['title'] = DI::l10n()->t('Link to source');
3096                         }
3097                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3098                         $ret = [
3099                                 'href' => $item['plink'],
3100                                 'orig' => $item['plink'],
3101                                 'title' => DI::l10n()->t('Link to source'),
3102                                 'orig_title' => DI::l10n()->t('Link to source'),
3103                         ];
3104                 } else {
3105                         $ret = [];
3106                 }
3107
3108                 return $ret;
3109         }
3110
3111         /**
3112          * Is the given item array a post that is sent as starting post to a forum?
3113          *
3114          * @param array $item
3115          * @param array $owner
3116          *
3117          * @return boolean "true" when it is a forum post
3118          */
3119         public static function isForumPost(array $item, array $owner = [])
3120         {
3121                 if (empty($owner)) {
3122                         $owner = User::getOwnerDataById($item['uid']);
3123                         if (empty($owner)) {
3124                                 return false;
3125                         }
3126                 }
3127
3128                 if (($item['author-id'] == $item['owner-id']) ||
3129                         ($owner['id'] == $item['contact-id']) ||
3130                         ($item['uri-id'] != $item['parent-uri-id']) ||
3131                         $item['origin']) {
3132                         return false;
3133                 }
3134
3135                 return Contact::isForum($item['contact-id']);
3136         }
3137
3138         /**
3139          * Search item id for given URI or plink
3140          *
3141          * @param string $uri
3142          * @param integer $uid
3143          *
3144          * @return integer item id
3145          */
3146         public static function searchByLink($uri, $uid = 0)
3147         {
3148                 $ssl_uri = str_replace('http://', 'https://', $uri);
3149                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3150
3151                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3152                 if (DBA::isResult($item)) {
3153                         return $item['id'];
3154                 }
3155
3156                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3157                 if (DBA::isResult($item)) {
3158                         return $item['id'];
3159                 }
3160
3161                 return 0;
3162         }
3163
3164         /**
3165          * Return the URI for a link to the post
3166          *
3167          * @param string $uri URI or link to post
3168          *
3169          * @return string URI
3170          */
3171         public static function getURIByLink(string $uri)
3172         {
3173                 $ssl_uri = str_replace('http://', 'https://', $uri);
3174                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3175
3176                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3177                 if (DBA::isResult($item)) {
3178                         return $item['uri'];
3179                 }
3180
3181                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3182                 if (DBA::isResult($item)) {
3183                         return $item['uri'];
3184                 }
3185
3186                 return '';
3187         }
3188
3189         /**
3190          * Fetches item for given URI or plink
3191          *
3192          * @param string $uri
3193          * @param integer $uid
3194          *
3195          * @return integer item id
3196          */
3197         public static function fetchByLink(string $uri, int $uid = 0)
3198         {
3199                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3200                 $item_id = self::searchByLink($uri, $uid);
3201                 if (!empty($item_id)) {
3202                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3203                         return $item_id;
3204                 }
3205
3206                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3207                         $item_id = self::searchByLink($fetched_uri, $uid);
3208                 } else {
3209                         $item_id = Diaspora::fetchByURL($uri);
3210                 }
3211
3212                 if (!empty($item_id)) {
3213                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3214                         return $item_id;
3215                 }
3216
3217                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3218                 return 0;
3219         }
3220
3221         /**
3222          * Return share data from an item array (if the item is shared item)
3223          * We are providing the complete Item array, because at some time in the future
3224          * we hopefully will define these values not in the body anymore but in some item fields.
3225          * This function is meant to replace all similar functions in the system.
3226          *
3227          * @param array $item
3228          *
3229          * @return array with share information
3230          */
3231         public static function getShareArray($item)
3232         {
3233                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3234                         return [];
3235                 }
3236
3237                 $attribute_string = $matches[2];
3238                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3239                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3240                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3241                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3242                         }
3243                 }
3244                 return $attributes;
3245         }
3246
3247         /**
3248          * Fetch item information for shared items from the original items and adds it.
3249          *
3250          * @param array $item
3251          *
3252          * @return array item array with data from the original item
3253          */
3254         public static function addShareDataFromOriginal(array $item)
3255         {
3256                 $shared = self::getShareArray($item);
3257                 if (empty($shared)) {
3258                         return $item;
3259                 }
3260
3261                 // Real reshares always have got a GUID.
3262                 if (empty($shared['guid'])) {
3263                         return $item;
3264                 }
3265
3266                 $uid = $item['uid'] ?? 0;
3267
3268                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3269                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3270                 if (!DBA::isResult($shared_item)) {
3271                         if (empty($shared['link'])) {
3272                                 return $item;
3273                         }
3274
3275                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3276                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3277                         if (empty($id)) {
3278                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3279                                 return $item;
3280                         }
3281
3282                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3283                         if (!DBA::isResult($shared_item)) {
3284                                 return $item;
3285                         }
3286                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3287                 } else {
3288                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3289                 }
3290
3291                 if (!empty($shared_item['title'])) {
3292                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3293                         unset($shared_item['title']);
3294                 } else {
3295                         $body = $shared_item['body'];
3296                 }
3297
3298                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3299                 unset($shared_item['body']);
3300
3301                 return array_merge($item, $shared_item);
3302         }
3303
3304         /**
3305          * Check a prospective item array against user-level permissions
3306          *
3307          * @param array $item Expected keys: uri, gravity, and
3308          *                    author-link if is author-id is set,
3309          *                    owner-link if is owner-id is set,
3310          *                    causer-link if is causer-id is set.
3311          * @param int   $user_id Local user ID
3312          * @return bool
3313          * @throws \Exception
3314          */
3315         protected static function isAllowedByUser(array $item, int $user_id)
3316         {
3317                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3318                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3319                         return false;
3320                 }
3321
3322                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3323                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3324                         return false;
3325                 }
3326
3327                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3328                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3329                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3330                         return false;
3331                 }
3332
3333                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3334                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3335                         return false;
3336                 }
3337
3338                 return true;
3339         }
3340
3341         /**
3342          * Improve the data in shared posts
3343          *
3344          * @param array $item
3345          * @return string body
3346          */
3347         public static function improveSharedDataInBody(array $item)
3348         {
3349                 $shared = BBCode::fetchShareAttributes($item['body']);
3350                 if (empty($shared['link'])) {
3351                         return $item['body'];
3352                 }
3353
3354                 $id = self::fetchByLink($shared['link']);
3355                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3356                 if (!$id) {
3357                         return $item['body'];
3358                 }
3359
3360                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3361                 if (!DBA::isResult($shared_item)) {
3362                         return $item['body'];
3363                 }
3364
3365                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3366
3367                 if (!empty($shared_item['title'])) {
3368                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3369                 }
3370
3371                 $shared_content .= $shared_item['body'];
3372
3373                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3374                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3375                 return $item['body'];
3376         }
3377 }