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                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 184
 185                                 // Remove all media attachments from the body and store them in the post-media table
 186                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 187                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 188                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 189
 190                                 if ($item['author-network'] != Protocol::DFRN) {
 191                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 192                                 }
 193
 194                                 Post\Content::update($item['uri-id'], $content_fields);
 195                         }
 196
 197                         if (!empty($fields['file'])) {
 198                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 199                         }
 200
 201                         if (!empty($fields['attach'])) {
 202                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 203                         }
 204
 205                         // We only need to notfiy others when it is an original entry from us.
 206                         // Only call the notifier when the item has some content relevant change.
 207                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 208                                 $notify_items[] = $item['id'];
 209                         }
 210                 }
 211
 212                 DBA::close($items);
 213
 214                 foreach ($notify_items as $notify_item) {
 215                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 216                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 217                 }
 218
 219                 return $rows;
 220         }
 221
 222         /**
 223          * Delete an item and notify others about it - if it was ours
 224          *
 225          * @param array   $condition The condition for finding the item entries
 226          * @param integer $priority  Priority for the notification
 227          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 228          */
 229         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 230         {
 231                 $items = Post::select(['id'], $condition);
 232                 while ($item = Post::fetch($items)) {
 233                         self::markForDeletionById($item['id'], $priority);
 234                 }
 235                 DBA::close($items);
 236         }
 237
 238         /**
 239          * Delete an item for an user and notify others about it - if it was ours
 240          *
 241          * @param array   $condition The condition for finding the item entries
 242          * @param integer $uid       User who wants to delete this item
 243          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 244          */
 245         public static function deleteForUser($condition, $uid)
 246         {
 247                 if ($uid == 0) {
 248                         return;
 249                 }
 250
 251                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 252                 while ($item = Post::fetch($items)) {
 253                         if (in_array($item['uid'], [$uid, 0])) {
 254                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 255                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 256                         }
 257
 258                         if ($item['uid'] == $uid) {
 259                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 260                         } elseif ($item['uid'] != 0) {
 261                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 262                         }
 263                 }
 264                 DBA::close($items);
 265         }
 266
 267         /**
 268          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 269          *
 270          * @param integer $item_id
 271          * @param integer $priority Priority for the notification
 272          *
 273          * @return boolean success
 274          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 275          */
 276         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 277         {
 278                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 279                 // locate item to be deleted
 280                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 281                         'deleted', 'resource-id', 'event-id',
 282                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 283                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 284                 if (!DBA::isResult($item)) {
 285                         Logger::info('Item not found.', ['id' => $item_id]);
 286                         return false;
 287                 }
 288
 289                 if ($item['deleted']) {
 290                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 291                         return false;
 292                 }
 293
 294                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 295                 if (!DBA::isResult($parent)) {
 296                         $parent = ['origin' => false];
 297                 }
 298
 299                 // clean up categories and tags so they don't end up as orphans
 300                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 301
 302                 /*
 303                  * If item is a link to a photo resource, nuke all the associated photos
 304                  * (visitors will not have photo resources)
 305                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 306                  * generate a resource-id and therefore aren't intimately linked to the item.
 307                  */
 308                 /// @TODO: this should first check if photo is used elsewhere
 309                 if (strlen($item['resource-id'])) {
 310                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 311                 }
 312
 313                 // If item is a link to an event, delete the event.
 314                 if (intval($item['event-id'])) {
 315                         Event::delete($item['event-id']);
 316                 }
 317
 318                 // If item has attachments, drop them
 319                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 320                 foreach($attachments as $attachment) {
 321                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 322                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 323                         }
 324                 }
 325
 326                 // Set the item to "deleted"
 327                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 328                 Post::update($item_fields, ['id' => $item['id']]);
 329
 330                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 331
 332                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 333                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 334                 }
 335
 336                 Post\DeliveryData::delete($item['uri-id']);
 337
 338                 // If it's the parent of a comment thread, kill all the kids
 339                 if ($item['gravity'] == GRAVITY_PARENT) {
 340                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 341                 }
 342
 343                 // Is it our comment and/or our thread?
 344                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 345                         // When we delete the original post we will delete all existing copies on the server as well
 346                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 347
 348                         // send the notification upstream/downstream
 349                         if ($priority) {
 350                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 351                         }
 352                 } elseif ($item['uid'] != 0) {
 353                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 354                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 355                 }
 356
 357                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 358
 359                 return true;
 360         }
 361
 362         private static function guid($item, $notify)
 363         {
 364                 if (!empty($item['guid'])) {
 365                         return Strings::escapeTags(trim($item['guid']));
 366                 }
 367
 368                 if ($notify) {
 369                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 370                         // We add the hash of our own host because our host is the original creator of the post.
 371                         $prefix_host = DI::baseUrl()->getHostname();
 372                 } else {
 373                         $prefix_host = '';
 374
 375                         // We are only storing the post so we create a GUID from the original hostname.
 376                         if (!empty($item['author-link'])) {
 377                                 $parsed = parse_url($item['author-link']);
 378                                 if (!empty($parsed['host'])) {
 379                                         $prefix_host = $parsed['host'];
 380                                 }
 381                         }
 382
 383                         if (empty($prefix_host) && !empty($item['plink'])) {
 384                                 $parsed = parse_url($item['plink']);
 385                                 if (!empty($parsed['host'])) {
 386                                         $prefix_host = $parsed['host'];
 387                                 }
 388                         }
 389
 390                         if (empty($prefix_host) && !empty($item['uri'])) {
 391                                 $parsed = parse_url($item['uri']);
 392                                 if (!empty($parsed['host'])) {
 393                                         $prefix_host = $parsed['host'];
 394                                 }
 395                         }
 396
 397                         // Is it in the format data@host.tld? - Used for mail contacts
 398                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 399                                 $mailparts = explode('@', $item['author-link']);
 400                                 $prefix_host = array_pop($mailparts);
 401                         }
 402                 }
 403
 404                 if (!empty($item['plink'])) {
 405                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 406                 } elseif (!empty($item['uri'])) {
 407                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 408                 } else {
 409                         $guid = System::createUUID(hash('crc32', $prefix_host));
 410                 }
 411
 412                 return $guid;
 413         }
 414
 415         private static function contactId($item)
 416         {
 417                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 418                         return $item['contact-id'];
 419                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 420                         return $item['contact-id'];
 421                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 422                         return $item['author-id'];
 423                 } elseif (!empty($item['contact-id'])) {
 424                         return $item['contact-id'];
 425                 } else {
 426                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 427                         if (!empty($contact_id)) {
 428                                 return $contact_id;
 429                         }
 430                 }
 431                 return $item['author-id'];
 432         }
 433
 434         /**
 435          * Write an item array into a spool file to be inserted later.
 436          * This command is called whenever there are issues storing an item.
 437          *
 438          * @param array $item The item fields that are to be inserted
 439          * @throws \Exception
 440          */
 441         private static function spool($orig_item)
 442         {
 443                 // Now we store the data in the spool directory
 444                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 445                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 446
 447                 $spoolpath = get_spoolpath();
 448                 if ($spoolpath != "") {
 449                         $spool = $spoolpath . '/' . $file;
 450
 451                         file_put_contents($spool, json_encode($orig_item));
 452                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 453                 }
 454         }
 455
 456         /**
 457          * Check if the item array is a duplicate
 458          *
 459          * @param array $item
 460          * @return boolean is it a duplicate?
 461          */
 462         private static function isDuplicate(array $item)
 463         {
 464                 // Checking if there is already an item with the same guid
 465                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 466                 if (Post::exists($condition)) {
 467                         Logger::notice('Found already existing item', [
 468                                 'guid' => $item['guid'],
 469                                 'uid' => $item['uid'],
 470                                 'network' => $item['network']
 471                         ]);
 472                         return true;
 473                 }
 474
 475                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 476                         'network' => [$item['network'], Protocol::DFRN]];
 477                 if (Post::exists($condition)) {
 478                         Logger::notice('duplicated item with the same uri found.', $item);
 479                         return true;
 480                 }
 481
 482                 // On Friendica and Diaspora the GUID is unique
 483                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 484                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 485                         if (Post::exists($condition)) {
 486                                 Logger::notice('duplicated item with the same guid found.', $item);
 487                                 return true;
 488                         }
 489                 } elseif ($item['network'] == Protocol::OSTATUS) {
 490                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 491                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 492                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 493                         if (Post::exists($condition)) {
 494                                 Logger::notice('duplicated item with the same body found.', $item);
 495                                 return true;
 496                         }
 497                 }
 498
 499                 /*
 500                  * Check for already added items.
 501                  * There is a timing issue here that sometimes creates double postings.
 502                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 503                  */
 504                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 505                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 506                         return true;
 507                 }
 508
 509                 return false;
 510         }
 511
 512         /**
 513          * Check if the item array is valid
 514          *
 515          * @param array $item
 516          * @return boolean item is valid
 517          */
 518         public static function isValid(array $item)
 519         {
 520                 // When there is no content then we don't post it
 521                 if (($item['body'] . $item['title'] == '') && !Post\Media::existsByURIId($item['uri-id'])) {
 522                         Logger::notice('No body, no title.');
 523                         return false;
 524                 }
 525
 526                 if (!empty($item['uid'])) {
 527                         $owner = User::getOwnerDataById($item['uid'], false);
 528                         if (!$owner) {
 529                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 530                                 return false;
 531                         }
 532
 533                         if ($owner['account_expired'] || $owner['account_removed']) {
 534                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 535                                 return false;
 536                         }
 537                 }
 538
 539                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 540                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 541                         return false;
 542                 }
 543
 544                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 545                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 546                         return false;
 547                 }
 548
 549                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 550                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 551                         return false;
 552                 }
 553
 554                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 555                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 556                         return false;
 557                 }
 558
 559                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 560                         return false;
 561                 }
 562
 563                 if ($item['verb'] == Activity::FOLLOW) {
 564                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 565                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 566                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 567                                 return false;
 568                         }
 569
 570                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 571                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 572                         if (Post::exists($condition)) {
 573                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 574                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 575                                 return false;
 576                         }
 577                 }
 578
 579                 return true;
 580         }
 581
 582         /**
 583          * Check if the item array is too old
 584          *
 585          * @param array $item
 586          * @return boolean item is too old
 587          */
 588         public static function isTooOld(array $item)
 589         {
 590                 // check for create date and expire time
 591                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 592
 593                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 594                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 595                         $expire_interval = $user['expire'];
 596                 }
 597
 598                 if (($expire_interval > 0) && !empty($item['created'])) {
 599                         $expire_date = time() - ($expire_interval * 86400);
 600                         $created_date = strtotime($item['created']);
 601                         if ($created_date < $expire_date) {
 602                                 Logger::notice('Item created before expiration interval.', [
 603                                         'created' => date('c', $created_date),
 604                                         'expired' => date('c', $expire_date),
 605                                         '$item' => $item
 606                                 ]);
 607                                 return true;
 608                         }
 609                 }
 610
 611                 return false;
 612         }
 613
 614         /**
 615          * Return the id of the given item array if it has been stored before
 616          *
 617          * @param array $item
 618          * @return integer item id
 619          */
 620         private static function getDuplicateID(array $item)
 621         {
 622                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 623                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 624                                 $item['uri-id'], $item['uid'],
 625                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 626                         $existing = Post::selectFirst(['id', 'network'], $condition);
 627                         if (DBA::isResult($existing)) {
 628                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 629                                 if ($item['uid'] != 0) {
 630                                         Logger::notice('Item already existed for user', [
 631                                                 'uri-id' => $item['uri-id'],
 632                                                 'uid' => $item['uid'],
 633                                                 'network' => $item['network'],
 634                                                 'existing_id' => $existing["id"],
 635                                                 'existing_network' => $existing["network"]
 636                                         ]);
 637                                 }
 638
 639                                 return $existing["id"];
 640                         }
 641                 }
 642                 return 0;
 643         }
 644
 645         /**
 646          * Fetch top-level parent data for the given item array
 647          *
 648          * @param array $item
 649          * @return array item array with parent data
 650          * @throws \Exception
 651          */
 652         private static function getTopLevelParent(array $item)
 653         {
 654                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 655                         'uri-id', 'parent-uri-id',
 656                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 657                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
 658                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 659                 $params = ['order' => ['id' => false]];
 660                 $parent = Post::selectFirst($fields, $condition, $params);
 661
 662                 if (!DBA::isResult($parent)) {
 663                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 664                         return [];
 665                 }
 666
 667                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 668                         return $parent;
 669                 }
 670
 671                 $condition = ['uri-id' => $parent['parent-uri-id'],
 672                         'parent-uri-id' => $parent['parent-uri-id'],
 673                         'uid' => $parent['uid']];
 674                 $params = ['order' => ['id' => false]];
 675                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 676                 if (!DBA::isResult($toplevel_parent)) {
 677                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 678                         return [];
 679                 }
 680
 681                 return $toplevel_parent;
 682         }
 683
 684         /**
 685          * Get the gravity for the given item array
 686          *
 687          * @param array $item
 688          * @return integer gravity
 689          */
 690         private static function getGravity(array $item)
 691         {
 692                 $activity = DI::activity();
 693
 694                 if (isset($item['gravity'])) {
 695                         return intval($item['gravity']);
 696                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 697                         return GRAVITY_PARENT;
 698                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 699                         return GRAVITY_COMMENT;
 700                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 701                         return GRAVITY_ACTIVITY;
 702                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 703                         return GRAVITY_ACTIVITY;
 704                 }
 705                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 706                 return GRAVITY_UNKNOWN;   // Should not happen
 707         }
 708
 709         public static function insert($item, $notify = false, $dontcache = false)
 710         {
 711                 $orig_item = $item;
 712
 713                 $priority = PRIORITY_HIGH;
 714
 715                 // If it is a posting where users should get notifications, then define it as wall posting
 716                 if ($notify) {
 717                         $item['wall'] = 1;
 718                         $item['origin'] = 1;
 719                         $item['network'] = Protocol::DFRN;
 720                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 721                         $item['direction'] = Conversation::PUSH;
 722
 723                         if (in_array($notify, PRIORITIES)) {
 724                                 $priority = $notify;
 725                         }
 726                 } else {
 727                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 728                 }
 729
 730                 $uid = intval($item['uid']);
 731
 732                 $item['guid'] = self::guid($item, $notify);
 733                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 734
 735                 // Store URI data
 736                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 737
 738                 // Backward compatibility: parent-uri used to be the direct parent uri.
 739                 // If it is provided without a thr-parent, it probably is the old behavior.
 740                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 741                 $item['parent-uri'] = $item['thr-parent'];
 742
 743                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 744
 745                 // Store conversation data
 746                 $item = Conversation::insert($item);
 747
 748                 /*
 749                  * Do we already have this item?
 750                  * We have to check several networks since Friendica posts could be repeated
 751                  * via OStatus (maybe Diasporsa as well)
 752                  */
 753                 $duplicate = self::getDuplicateID($item);
 754                 if ($duplicate) {
 755                         return $duplicate;
 756                 }
 757
 758                 // Additional duplicate checks
 759                 /// @todo Check why the first duplication check returns the item number and the second a 0
 760                 if (self::isDuplicate($item)) {
 761                         return 0;
 762                 }
 763
 764                 if (!isset($item['post-type'])) {
 765                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 766                 }
 767
 768                 $item['wall']          = intval($item['wall'] ?? 0);
 769                 $item['extid']         = trim($item['extid'] ?? '');
 770                 $item['author-name']   = trim($item['author-name'] ?? '');
 771                 $item['author-link']   = trim($item['author-link'] ?? '');
 772                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 773                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 774                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 775                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 776                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 777                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 778                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 779                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 780                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 781                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 782                 $item['location']      = trim($item['location'] ?? '');
 783                 $item['coord']         = trim($item['coord'] ?? '');
 784                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 785                 $item['deleted']       = 0;
 786                 $item['verb']          = trim($item['verb'] ?? '');
 787                 $item['object-type']   = trim($item['object-type'] ?? '');
 788                 $item['object']        = trim($item['object'] ?? '');
 789                 $item['target-type']   = trim($item['target-type'] ?? '');
 790                 $item['target']        = trim($item['target'] ?? '');
 791                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 792                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 793                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 794                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 795                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 796                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 797                 $item['body']          = trim($item['body'] ?? '');
 798                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 799                 $item['app']           = trim($item['app'] ?? '');
 800                 $item['origin']        = intval($item['origin'] ?? 0);
 801                 $item['postopts']      = trim($item['postopts'] ?? '');
 802                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 803                 $item['event-id']      = intval($item['event-id'] ?? 0);
 804                 $item['inform']        = trim($item['inform'] ?? '');
 805                 $item['file']          = trim($item['file'] ?? '');
 806
 807                 // Items cannot be stored before they happen ...
 808                 if ($item['created'] > DateTimeFormat::utcNow()) {
 809                         $item['created'] = DateTimeFormat::utcNow();
 810                 }
 811
 812                 // We haven't invented time travel by now.
 813                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 814                         $item['edited'] = DateTimeFormat::utcNow();
 815                 }
 816
 817                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 818
 819                 $item['gravity'] = self::getGravity($item);
 820
 821                 $item['language'] = self::getLanguage($item);
 822
 823                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 824                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 825                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 826
 827                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 828                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 829                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 830
 831                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 832                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 833                         $item['post-reason'] = self::PR_FOLLOWER;
 834                 }
 835
 836                 // Ensure that there is an avatar cache
 837                 Contact::checkAvatarCache($item['author-id']);
 838                 Contact::checkAvatarCache($item['owner-id']);
 839
 840                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 841                 $item["contact-id"] = self::contactId($item);
 842
 843                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 844                         self::isTooOld($item)) {
 845                         Logger::info('Item is too old', ['item' => $item]);
 846                         return 0;
 847                 }
 848
 849                 if (!self::isValid($item)) {
 850                         return 0;
 851                 }
 852
 853                 if ($item['gravity'] !== GRAVITY_PARENT) {
 854                         $toplevel_parent = self::getTopLevelParent($item);
 855                         if (empty($toplevel_parent)) {
 856                                 return 0;
 857                         }
 858
 859                         // If the thread originated from this node, we check the permission against the thread starter
 860                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 861                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 862                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 863                                 return 0;
 864                         }
 865
 866                         $parent_id             = $toplevel_parent['id'];
 867                         $item['parent-uri']    = $toplevel_parent['uri'];
 868                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 869                         $item['deleted']       = $toplevel_parent['deleted'];
 870                         $item['allow_cid']     = $toplevel_parent['allow_cid'];
 871                         $item['allow_gid']     = $toplevel_parent['allow_gid'];
 872                         $item['deny_cid']      = $toplevel_parent['deny_cid'];
 873                         $item['deny_gid']      = $toplevel_parent['deny_gid'];
 874                         $parent_origin         = $toplevel_parent['origin'];
 875
 876                         // Don't federate received participation messages
 877                         if ($item['verb'] != Activity::FOLLOW) {
 878                                 $item['wall'] = $toplevel_parent['wall'];
 879                         } else {
 880                                 $item['wall'] = false;
 881                                 // Participations are technical messages, so they are set to "seen" automatically
 882                                 $item['unseen'] = false;
 883                         }
 884
 885                         /*
 886                          * If the parent is private, force privacy for the entire conversation
 887                          * This differs from the above settings as it subtly allows comments from
 888                          * email correspondents to be private even if the overall thread is not.
 889                          */
 890                         if ($toplevel_parent['private']) {
 891                                 $item['private'] = $toplevel_parent['private'];
 892                         }
 893
 894                         /*
 895                          * Edge case. We host a public forum that was originally posted to privately.
 896                          * The original author commented, but as this is a comment, the permissions
 897                          * weren't fixed up so it will still show the comment as private unless we fix it here.
 898                          */
 899                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
 900                                 $item['private'] = self::PUBLIC;
 901                         }
 902
 903                         // If its a post that originated here then tag the thread as "mention"
 904                         if ($item['origin'] && $item['uid']) {
 905                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 906                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 907                         }
 908
 909                         // Update the contact relations
 910                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 911                 } else {
 912                         $parent_id = 0;
 913                         $parent_origin = $item['origin'];
 914                 }
 915
 916                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 917                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 918
 919                 // Is this item available in the global items (with uid=0)?
 920                 if ($item["uid"] == 0) {
 921                         $item["global"] = true;
 922
 923                         // Set the global flag on all items if this was a global item entry
 924                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 925                 } else {
 926                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 927                 }
 928
 929                 // ACL settings
 930                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 931                         $item["private"] = self::PRIVATE;
 932                 }
 933
 934                 if ($notify) {
 935                         $item['edit'] = false;
 936                         $item['parent'] = $parent_id;
 937
 938                         // Trigger automatic reactions for addons
 939                         $item['api_source'] = true;
 940
 941                         // We have to tell the hooks who we are - this really should be improved
 942                         if (!local_user()) {
 943                                 $_SESSION['authenticated'] = true;
 944                                 $_SESSION['uid'] = $uid;
 945                                 $dummy_session = true;
 946                         } else {
 947                                 $dummy_session = false;
 948                         }
 949
 950                         Hook::callAll('post_local', $item);
 951
 952                         if ($dummy_session) {
 953                                 unset($_SESSION['authenticated']);
 954                                 unset($_SESSION['uid']);
 955                         }
 956                 } else {
 957                         Hook::callAll('post_remote', $item);
 958                 }
 959
 960                 if (!empty($item['cancel'])) {
 961                         Logger::log('post cancelled by addon.');
 962                         return 0;
 963                 }
 964
 965                 if (empty($item['vid']) && !empty($item['verb'])) {
 966                         $item['vid'] = Verb::getID($item['verb']);
 967                 }
 968
 969                 // Creates or assigns the permission set
 970                 $item['psid'] = PermissionSet::getIdFromACL(
 971                         $item['uid'],
 972                         $item['allow_cid'],
 973                         $item['allow_gid'],
 974                         $item['deny_cid'],
 975                         $item['deny_gid']
 976                 );
 977
 978                 if (!empty($item['extid'])) {
 979                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
 980                 }
 981
 982                 if ($item['verb'] == Activity::ANNOUNCE) {
 983                         self::setOwnerforResharedItem($item);
 984                 }
 985
 986                 if (isset($item['attachments'])) {
 987                         foreach ($item['attachments'] as $attachment) {
 988                                 $attachment['uri-id'] = $item['uri-id'];
 989                                 Post\Media::insert($attachment);
 990                         }
 991                         unset($item['attachments']);
 992                 }
 993
 994                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
 995
 996                 // Remove all media attachments from the body and store them in the post-media table
 997                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
 998                 $item['raw-body'] = self::setHashtags($item['raw-body']);
 999
1000                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1001                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1002                 }
1003
1004                 // Check for hashtags in the body and repair or add hashtag links
1005                 $item['body'] = self::setHashtags($item['body']);
1006
1007                 // Fill the cache field
1008                 self::putInCache($item);
1009
1010                 if (stristr($item['verb'], Activity::POKE)) {
1011                         $notify_type = Delivery::POKE;
1012                 } else {
1013                         $notify_type = Delivery::POST;
1014                 }
1015
1016                 // Filling item related side tables
1017                 if (!empty($item['attach'])) {
1018                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1019                 }
1020
1021                 if (empty($item['event-id'])) {
1022                         unset($item['event-id']);
1023
1024                         $ev = Event::fromBBCode($item['body']);
1025                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1026                                 Logger::info('Event found.');
1027                                 $ev['cid']       = $item['contact-id'];
1028                                 $ev['uid']       = $item['uid'];
1029                                 $ev['uri']       = $item['uri'];
1030                                 $ev['edited']    = $item['edited'];
1031                                 $ev['private']   = $item['private'];
1032                                 $ev['guid']      = $item['guid'];
1033                                 $ev['plink']     = $item['plink'];
1034                                 $ev['network']   = $item['network'];
1035                                 $ev['protocol']  = $item['protocol'];
1036                                 $ev['direction'] = $item['direction'];
1037                                 $ev['source']    = $item['source'];
1038
1039                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1040                                 if (DBA::isResult($event)) {
1041                                         $ev['id'] = $event['id'];
1042                                 }
1043
1044                                 $item['event-id'] = Event::store($ev);
1045                                 Logger::info('Event was stored', ['id' => $item['event-id']]);
1046                         }
1047                 }
1048
1049                 if (empty($item['causer-id'])) {
1050                         unset($item['causer-id']);
1051                 }
1052
1053                 Post::insert($item['uri-id'], $item);
1054
1055                 if ($item['gravity'] == GRAVITY_PARENT) {
1056                         Post\Thread::insert($item['uri-id'], $item);
1057                 }
1058
1059                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1060                         Post\Content::insert($item['uri-id'], $item);
1061                 }
1062
1063                 // Create Diaspora signature
1064                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1065                         $signed = Diaspora::createCommentSignature($uid, $item);
1066                         if (!empty($signed)) {
1067                                 $item['diaspora_signed_text'] = json_encode($signed);
1068                         }
1069                 }
1070
1071                 if (!empty($item['diaspora_signed_text'])) {
1072                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1073                 }
1074
1075                 // Attached file links
1076                 if (!empty($item['file'])) {
1077                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1078                 }
1079
1080                 // Delivery relevant data
1081                 $delivery_data = Post\DeliveryData::extractFields($item);
1082
1083                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1084                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1085                 }
1086
1087                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1088                 if (!Tag::existsForPost($item['uri-id'])) {
1089                         Tag::storeFromBody($item['uri-id'], $item['body']);
1090                 }
1091
1092                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1093                 if (Post::exists($condition)) {
1094                         Logger::notice('Item is already inserted - aborting', $condition);
1095                         return 0;
1096                 }
1097
1098                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1099                 if (!$post_user_id) {
1100                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1101                         return 0;
1102                 }
1103
1104                 if ($item['gravity'] == GRAVITY_PARENT) {
1105                         $item['post-user-id'] = $post_user_id;
1106                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1107                 }
1108
1109                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1110
1111                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1112                 if (!DBA::isResult($posted_item)) {
1113                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1114                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1115                         self::spool($orig_item);
1116                         return 0;
1117                 }
1118
1119                 // update the commented timestamp on the parent
1120                 if (DI::config()->get('system', 'like_no_comment')) {
1121                         // Update when it is a comment
1122                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1123                 } else {
1124                         // Update when it isn't a follow or tag verb
1125                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1126                 }
1127
1128                 if ($update_commented) {
1129                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1130                 } else {
1131                         $fields = ['changed' => DateTimeFormat::utcNow()];
1132                 }
1133
1134                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1135
1136                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1137                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1138                         // Get the user information for the logging
1139                         $user = User::getById($uid);
1140
1141                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1142                         return 0;
1143                 }
1144
1145                 if (!$dontcache) {
1146                         if ($notify) {
1147                                 Hook::callAll('post_local_end', $posted_item);
1148                         } else {
1149                                 Hook::callAll('post_remote_end', $posted_item);
1150                         }
1151                 }
1152
1153                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1154                         self::addShadow($post_user_id);
1155                 } else {
1156                         self::addShadowPost($post_user_id);
1157                 }
1158
1159                 self::updateContact($posted_item);
1160
1161                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1162
1163                 check_user_notification($posted_item['uri-id'], $posted_item['uid']);
1164
1165                 // Distribute items to users who subscribed to their tags
1166                 self::distributeByTags($posted_item);
1167
1168                 // Automatically reshare the item if the "remote_self" option is selected
1169                 self::autoReshare($posted_item);
1170
1171                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1172
1173                 if ($transmit) {
1174                         // Don't relay participation messages
1175                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1176                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1177                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1178                                 $transmit = false;
1179                         }
1180                 }
1181
1182                 if ($transmit) {
1183                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1184                 }
1185
1186                 return $post_user_id;
1187         }
1188
1189         /**
1190          * Change the owner of a parent item if it had been shared by a forum
1191          *
1192          * (public) forum posts in the new format consist of the regular post by the author
1193          * followed by an announce message sent from the forum account.
1194          * Changing the owner helps in grouping forum posts.
1195          *
1196          * @param array $item
1197          * @return void
1198          */
1199         private static function setOwnerforResharedItem(array $item)
1200         {
1201                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1202                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1203                 if (!DBA::isResult($parent)) {
1204                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1205                         return;
1206                 }
1207
1208                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1209                 if (!DBA::isResult($author)) {
1210                         Logger::error('Author not found', ['id' => $item['author-id']]);
1211                         return;
1212                 }
1213
1214                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1215                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1216                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1217                         return;
1218                 }
1219
1220                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1221                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1222                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1223                                 return;
1224                         }
1225
1226                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1227                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1228                                 return;
1229                         }
1230                 }
1231
1232                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1233                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1234         }
1235
1236         /**
1237          * Distribute the given item to users who subscribed to their tags
1238          *
1239          * @param array $item     Processed item
1240          */
1241         private static function distributeByTags(array $item)
1242         {
1243                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1244                         return;
1245                 }
1246
1247                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1248                 foreach ($uids as $uid) {
1249                         if (Contact::isSharing($item['author-id'], $uid)) {
1250                                 $fields = [];
1251                         } else {
1252                                 $fields = ['post-reason' => self::PR_TAG];
1253                         }
1254
1255                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1256                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1257                 }
1258         }
1259
1260         /**
1261          * Distributes public items to the receivers
1262          *
1263          * @param integer $itemid      Item ID that should be added
1264          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1265          * @throws \Exception
1266          */
1267         public static function distribute($itemid, $signed_text = '')
1268         {
1269                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1270                 $parent = Post::selectFirst(['owner-id'], $condition);
1271                 if (!DBA::isResult($parent)) {
1272                         Logger::warning('Item not found', ['condition' => $condition]);
1273                         return;
1274                 }
1275
1276                 // Only distribute public items from native networks
1277                 $condition = ['id' => $itemid, 'uid' => 0,
1278                         'network' => array_merge(Protocol::FEDERATED ,['']),
1279                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1280                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1281                 if (!DBA::isResult($item)) {
1282                         Logger::warning('Item not found', ['condition' => $condition]);
1283                         return;
1284                 }
1285
1286                 $origin = $item['origin'];
1287
1288                 $users = [];
1289
1290                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1291                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1292                 if (!DBA::isResult($owner)) {
1293                         return;
1294                 }
1295
1296                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1297                 $contacts = DBA::select('contact', ['uid'], $condition);
1298                 while ($contact = DBA::fetch($contacts)) {
1299                         if ($contact['uid'] == 0) {
1300                                 continue;
1301                         }
1302
1303                         $users[$contact['uid']] = $contact['uid'];
1304                 }
1305                 DBA::close($contacts);
1306
1307                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1308                 $contacts = DBA::select('contact', ['uid'], $condition);
1309                 while ($contact = DBA::fetch($contacts)) {
1310                         if ($contact['uid'] == 0) {
1311                                 continue;
1312                         }
1313
1314                         $users[$contact['uid']] = $contact['uid'];
1315                 }
1316                 DBA::close($contacts);
1317
1318                 if (!empty($owner['alias'])) {
1319                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1320                         $contacts = DBA::select('contact', ['uid'], $condition);
1321                         while ($contact = DBA::fetch($contacts)) {
1322                                 if ($contact['uid'] == 0) {
1323                                         continue;
1324                                 }
1325
1326                                 $users[$contact['uid']] = $contact['uid'];
1327                         }
1328                         DBA::close($contacts);
1329                 }
1330
1331                 $origin_uid = 0;
1332
1333                 if ($item['uri-id'] != $item['parent-uri-id']) {
1334                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1335                         while ($parent = Post::fetch($parents)) {
1336                                 $users[$parent['uid']] = $parent['uid'];
1337                                 if ($parent['origin'] && !$origin) {
1338                                         $origin_uid = $parent['uid'];
1339                                 }
1340                         }
1341                         DBA::close($parents);
1342                 }
1343
1344                 foreach ($users as $uid) {
1345                         if ($origin_uid == $uid) {
1346                                 $item['diaspora_signed_text'] = $signed_text;
1347                         }
1348                         self::storeForUser($item, $uid);
1349                 }
1350         }
1351
1352         /**
1353          * Store a public item defined by their URI-ID for the given users
1354          *
1355          * @param integer $uri_id     URI-ID of the given item
1356          * @param integer $uid        The user that will receive the item entry
1357          * @param array   $fields     Additional fields to be stored
1358          * @param integer $source_uid User id of the source post
1359          * @return integer stored item id
1360          */
1361         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1362         {
1363                 if ($uid == $source_uid) {
1364                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1365                         return 0;
1366                 }
1367
1368                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1369                 if (!DBA::isResult($item)) {
1370                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1371                         return 0;
1372                 }
1373
1374                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1375                         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']]);
1376                         return 0;
1377                 }
1378
1379                 $item['post-reason'] = self::PR_STORED;
1380
1381                 $item = array_merge($item, $fields);
1382
1383                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1384
1385                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1386                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') &&
1387                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1388                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1389                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1390                         return 0;
1391                 }
1392
1393                 if ((($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1394                         // Only do an auto complete with the source uid "0" to prevent privavy problems
1395                         $causer = $item['causer-id'] ?: $item['author-id'];
1396                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED]);
1397                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1398                 }
1399
1400                 $stored = self::storeForUser($item, $uid);
1401                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1402                 return $stored;
1403         }
1404
1405         /**
1406          * Store a public item array for the given users
1407          *
1408          * @param array   $item   The item entry that will be stored
1409          * @param integer $uid    The user that will receive the item entry
1410          * @return integer stored item id
1411          * @throws \Exception
1412          */
1413         private static function storeForUser(array $item, int $uid)
1414         {
1415                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1416                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1417                         return 0;
1418                 }
1419
1420                 unset($item['id']);
1421                 unset($item['mention']);
1422                 unset($item['starred']);
1423                 unset($item['unseen']);
1424                 unset($item['psid']);
1425                 unset($item['pinned']);
1426                 unset($item['ignored']);
1427                 unset($item['pubmail']);
1428                 unset($item['forum_mode']);
1429
1430                 unset($item['event-id']);
1431                 unset($item['hidden']);
1432                 unset($item['notification-type']);
1433
1434                 $item['uid'] = $uid;
1435                 $item['origin'] = 0;
1436                 $item['wall'] = 0;
1437
1438                 if ($item['gravity'] == GRAVITY_PARENT) {
1439                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1440                 } else {
1441                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1442                 }
1443
1444                 if (!empty($contact['id'])) {
1445                         $item['contact-id'] = $contact['id'];
1446                 } else {
1447                         // Shouldn't happen at all
1448                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1449                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1450                         if (!DBA::isResult($self)) {
1451                                 // Shouldn't happen even less
1452                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1453                                 return 0;
1454                         }
1455                         $item['contact-id'] = $self['id'];
1456                 }
1457
1458                 $notify = false;
1459                 if ($item['gravity'] == GRAVITY_PARENT) {
1460                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1461                         if (DBA::isResult($contact)) {
1462                                 $notify = self::isRemoteSelf($contact, $item);
1463                         }
1464                 }
1465
1466                 $distributed = self::insert($item, $notify, true);
1467
1468                 if (!$distributed) {
1469                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1470                 } else {
1471                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1472                 }
1473                 return $distributed;
1474         }
1475
1476         /**
1477          * Add a shadow entry for a given item id that is a thread starter
1478          *
1479          * We store every public item entry additionally with the user id "0".
1480          * This is used for the community page and for the search.
1481          * It is planned that in the future we will store public item entries only once.
1482          *
1483          * @param integer $itemid Item ID that should be added
1484          * @throws \Exception
1485          */
1486         private static function addShadow($itemid)
1487         {
1488                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1489                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1490                 $item = Post::selectFirst($fields, $condition);
1491
1492                 if (!DBA::isResult($item)) {
1493                         return;
1494                 }
1495
1496                 // is it already a copy?
1497                 if (($itemid == 0) || ($item['uid'] == 0)) {
1498                         return;
1499                 }
1500
1501                 // Is it a visible public post?
1502                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1503                         return;
1504                 }
1505
1506                 // is it an entry from a connector? Only add an entry for natively connected networks
1507                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1508                         return;
1509                 }
1510
1511                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1512                         return;
1513                 }
1514
1515                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1516
1517                 if (DBA::isResult($item)) {
1518                         // Preparing public shadow (removing user specific data)
1519                         $item['uid'] = 0;
1520                         unset($item['id']);
1521                         unset($item['parent']);
1522                         unset($item['wall']);
1523                         unset($item['mention']);
1524                         unset($item['origin']);
1525                         unset($item['starred']);
1526                         unset($item['postopts']);
1527                         unset($item['inform']);
1528                         unset($item['post-reason']);
1529                         if ($item['uri-id'] == $item['parent-uri-id']) {
1530                                 $item['contact-id'] = $item['owner-id'];
1531                         } else {
1532                                 $item['contact-id'] = $item['author-id'];
1533                         }
1534
1535                         $public_shadow = self::insert($item, false, true);
1536
1537                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1538                 }
1539         }
1540
1541         /**
1542          * Add a shadow entry for a given item id that is a comment
1543          *
1544          * This function does the same like the function above - but for comments
1545          *
1546          * @param integer $itemid Item ID that should be added
1547          * @throws \Exception
1548          */
1549         private static function addShadowPost($itemid)
1550         {
1551                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1552                 if (!DBA::isResult($item)) {
1553                         return;
1554                 }
1555
1556                 // Is it a toplevel post?
1557                 if ($item['gravity'] == GRAVITY_PARENT) {
1558                         self::addShadow($itemid);
1559                         return;
1560                 }
1561
1562                 // Is this a shadow entry?
1563                 if ($item['uid'] == 0) {
1564                         return;
1565                 }
1566
1567                 // Is there a shadow parent?
1568                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1569                         return;
1570                 }
1571
1572                 // Is there already a shadow entry?
1573                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1574                         return;
1575                 }
1576
1577                 // Save "origin" and "parent" state
1578                 $origin = $item['origin'];
1579                 $parent = $item['parent'];
1580
1581                 // Preparing public shadow (removing user specific data)
1582                 $item['uid'] = 0;
1583                 unset($item['id']);
1584                 unset($item['parent']);
1585                 unset($item['wall']);
1586                 unset($item['mention']);
1587                 unset($item['origin']);
1588                 unset($item['starred']);
1589                 unset($item['postopts']);
1590                 unset($item['inform']);
1591                 unset($item['post-reason']);
1592                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1593
1594                 $public_shadow = self::insert($item, false, true);
1595
1596                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1597
1598                 // If this was a comment to a Diaspora post we don't get our comment back.
1599                 // This means that we have to distribute the comment by ourselves.
1600                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1601                         self::distribute($public_shadow);
1602                 }
1603         }
1604
1605         /**
1606          * Adds a language specification in a "language" element of given $arr.
1607          * Expects "body" element to exist in $arr.
1608          *
1609          * @param array $item
1610          * @return string detected language
1611          * @throws \Text_LanguageDetect_Exception
1612          */
1613         private static function getLanguage(array $item)
1614         {
1615                 if (!empty($item['language'])) {
1616                         return $item['language'];
1617                 }
1618
1619                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1620                         return '';
1621                 }
1622
1623                 // Convert attachments to links
1624                 $naked_body = BBCode::removeAttachment($item['body']);
1625                 if (empty($naked_body)) {
1626                         return '';
1627                 }
1628
1629                 // Remove links and pictures
1630                 $naked_body = BBCode::removeLinks($naked_body);
1631
1632                 // Convert the title and the body to plain text
1633                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1634
1635                 // Remove possibly remaining links
1636                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1637
1638                 if (empty($naked_body)) {
1639                         return '';
1640                 }
1641
1642                 $ld = new Language(DI::l10n()->getAvailableLanguages());
1643                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1644                 if (is_array($languages)) {
1645                         return json_encode($languages);
1646                 }
1647
1648                 return '';
1649         }
1650
1651         public static function getLanguageMessage(array $item)
1652         {
1653                 $iso639 = new \Matriphe\ISO639\ISO639;
1654
1655                 $used_languages = '';
1656                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1657                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1658                 }
1659                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1660                 return $used_languages;
1661         }
1662
1663         /**
1664          * Creates an unique guid out of a given uri
1665          *
1666          * @param string $uri uri of an item entry
1667          * @param string $host hostname for the GUID prefix
1668          * @return string unique guid
1669          */
1670         public static function guidFromUri($uri, $host)
1671         {
1672                 // Our regular guid routine is using this kind of prefix as well
1673                 // We have to avoid that different routines could accidentally create the same value
1674                 $parsed = parse_url($uri);
1675
1676                 // We use a hash of the hostname as prefix for the guid
1677                 $guid_prefix = hash("crc32", $host);
1678
1679                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1680                 unset($parsed["scheme"]);
1681
1682                 // Glue it together to be able to make a hash from it
1683                 $host_id = implode("/", $parsed);
1684
1685                 // We could use any hash algorithm since it isn't a security issue
1686                 $host_hash = hash("ripemd128", $host_id);
1687
1688                 return $guid_prefix.$host_hash;
1689         }
1690
1691         /**
1692          * generate an unique URI
1693          *
1694          * @param integer $uid  User id
1695          * @param string  $guid An existing GUID (Otherwise it will be generated)
1696          *
1697          * @return string
1698          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1699          */
1700         public static function newURI($uid, $guid = "")
1701         {
1702                 if ($guid == "") {
1703                         $guid = System::createUUID();
1704                 }
1705
1706                 return DI::baseUrl()->get() . '/objects/' . $guid;
1707         }
1708
1709         /**
1710          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1711          *
1712          * This can be used to filter for inactive contacts.
1713          * Only do this for public postings to avoid privacy problems, since poco data is public.
1714          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1715          *
1716          * @param array $arr Contains the just posted item record
1717          * @throws \Exception
1718          */
1719         private static function updateContact($arr)
1720         {
1721                 // Unarchive the author
1722                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1723                 if (DBA::isResult($contact)) {
1724                         Contact::unmarkForArchival($contact);
1725                 }
1726
1727                 // Unarchive the contact if it's not our own contact
1728                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1729                 if (DBA::isResult($contact)) {
1730                         Contact::unmarkForArchival($contact);
1731                 }
1732
1733                 /// @todo On private posts we could obfuscate the date
1734                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1735
1736                 // Is it a forum? Then we don't care about the rules from above
1737                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1738                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1739                                 $update = true;
1740                         }
1741                 }
1742
1743                 if ($update) {
1744                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1745                         // So we have to ensure to only update the last item when it had been our own post,
1746                         // or it had been done by a "regular" contact.
1747                         if (!empty($arr['wall'])) {
1748                                 $condition = ['id' => $arr['contact-id']];
1749                         } else {
1750                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1751                         }
1752                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1753                 }
1754                 // Now do the same for the system wide contacts with uid=0
1755                 if ($arr['private'] != self::PRIVATE) {
1756                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1757                                 ['id' => $arr['owner-id']]);
1758
1759                         if ($arr['owner-id'] != $arr['author-id']) {
1760                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1761                                         ['id' => $arr['author-id']]);
1762                         }
1763                 }
1764         }
1765
1766         public static function setHashtags($body)
1767         {
1768                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1769                         $tags = BBCode::getTags($body);
1770
1771                         // No hashtags?
1772                         if (!count($tags)) {
1773                                 return $body;
1774                         }
1775
1776                         // This sorting is important when there are hashtags that are part of other hashtags
1777                         // Otherwise there could be problems with hashtags like #test and #test2
1778                         // Because of this we are sorting from the longest to the shortest tag.
1779                         usort($tags, function ($a, $b) {
1780                                 return strlen($b) <=> strlen($a);
1781                         });
1782
1783                         $URLSearchString = "^\[\]";
1784
1785                         // All hashtags should point to the home server if "local_tags" is activated
1786                         if (DI::config()->get('system', 'local_tags')) {
1787                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1788                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1789                         }
1790
1791                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1792                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1793                                 function ($match) {
1794                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1795                                 }, $body);
1796
1797                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1798                                 function ($match) {
1799                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1800                                 }, $body);
1801
1802                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1803                                 function ($match) {
1804                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1805                                 }, $body);
1806
1807                         // Repair recursive urls
1808                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1809                                 "&num;$2", $body);
1810
1811                         foreach ($tags as $tag) {
1812                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1813                                         continue;
1814                                 }
1815
1816                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1817                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1818
1819                                 $body = str_replace($tag, $newtag, $body);
1820                         }
1821
1822                         // Convert back the masked hashtags
1823                         $body = str_replace("&num;", "#", $body);
1824
1825                         return $body;
1826                 });
1827
1828                 return $body;
1829         }
1830
1831         /**
1832          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1833          *
1834          * @param int $uid
1835          * @param int $item_id
1836          * @return boolean true if item was deleted, else false
1837          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1838          * @throws \ImagickException
1839          */
1840         private static function tagDeliver($uid, $item_id)
1841         {
1842                 $mention = false;
1843
1844                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
1845                 if (!DBA::isResult($user)) {
1846                         return false;
1847                 }
1848
1849                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
1850                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
1851
1852                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
1853                 if (!DBA::isResult($item)) {
1854                         return false;
1855                 }
1856
1857                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
1858
1859                 /*
1860                  * Diaspora uses their own hardwired link URL in @-tags
1861                  * instead of the one we supply with webfinger
1862                  */
1863                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
1864
1865                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1866                 if ($cnt) {
1867                         foreach ($matches as $mtch) {
1868                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
1869                                         $mention = true;
1870                                         Logger::log('mention found: ' . $mtch[2]);
1871                                 }
1872                         }
1873                 }
1874
1875                 if (!$mention) {
1876                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1877                         foreach ($tags as $tag) {
1878                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
1879                                         $mention = true;
1880                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
1881                                 }
1882                         }
1883                 }
1884
1885                 if (!$mention) {
1886                         if (($community_page || $prvgroup) &&
1887                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
1888                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item['id'], 'guid'=> $item['guid']]);
1889                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1890                                 return true;
1891                         }
1892                         return false;
1893                 }
1894
1895                 $arr = ['item' => $item, 'user' => $user];
1896
1897                 Hook::callAll('tagged', $arr);
1898
1899                 if (!$community_page && !$prvgroup) {
1900                         return false;
1901                 }
1902
1903                 /*
1904                  * tgroup delivery - setup a second delivery chain
1905                  * prevent delivery looping - only proceed
1906                  * if the message originated elsewhere and is a top-level post
1907                  */
1908                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1909                         return false;
1910                 }
1911
1912                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1913                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1914                 if (!DBA::isResult($self)) {
1915                         return false;
1916                 }
1917
1918                 $owner_id = Contact::getIdForURL($self['url']);
1919
1920                 // also reset all the privacy bits to the forum default permissions
1921
1922                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
1923
1924                 $psid = PermissionSet::getIdFromACL(
1925                         $user['uid'],
1926                         $user['allow_cid'],
1927                         $user['allow_gid'],
1928                         $user['deny_cid'],
1929                         $user['deny_gid']
1930                 );
1931
1932                 $forum_mode = ($prvgroup ? 2 : 1);
1933
1934                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1935                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
1936                 self::update($fields, ['id' => $item['id']]);
1937
1938                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, (int)$item['uri-id'], (int)$item['uid']);
1939
1940                 self::performActivity($item['id'], 'announce', $uid);
1941
1942                 return false;
1943         }
1944
1945         /**
1946          * Automatically reshare the item if the "remote_self" option is selected
1947          *
1948          * @param array $item
1949          * @return void
1950          */
1951         private static function autoReshare(array $item)
1952         {
1953                 if ($item['gravity'] != GRAVITY_PARENT) {
1954                         return;
1955                 }
1956
1957                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
1958                         return;
1959                 }
1960
1961                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1962                         return;
1963                 }
1964
1965                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1966
1967                 self::performActivity($item['id'], 'announce', $item['uid']);
1968         }
1969
1970         public static function isRemoteSelf($contact, &$datarray)
1971         {
1972                 if (!$contact['remote_self']) {
1973                         return false;
1974                 }
1975
1976                 // Prevent the forwarding of posts that are forwarded
1977                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
1978                         Logger::info('Already forwarded');
1979                         return false;
1980                 }
1981
1982                 // Prevent to forward already forwarded posts
1983                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
1984                         Logger::info('Already forwarded (second test)');
1985                         return false;
1986                 }
1987
1988                 // Only forward posts
1989                 if ($datarray["verb"] != Activity::POST) {
1990                         Logger::info('No post');
1991                         return false;
1992                 }
1993
1994                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
1995                         Logger::info('Not public');
1996                         return false;
1997                 }
1998
1999                 $datarray2 = $datarray;
2000                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2001                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2002                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2003                                         ['uid' => $contact['uid'], 'self' => true]);
2004                         if (DBA::isResult($self)) {
2005                                 $datarray['contact-id'] = $self["id"];
2006
2007                                 $datarray['owner-name'] = $self["name"];
2008                                 $datarray['owner-link'] = $self["url"];
2009                                 $datarray['owner-avatar'] = $self["thumb"];
2010
2011                                 $datarray['author-name']   = $datarray['owner-name'];
2012                                 $datarray['author-link']   = $datarray['owner-link'];
2013                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2014
2015                                 unset($datarray['edited']);
2016
2017                                 unset($datarray['network']);
2018                                 unset($datarray['owner-id']);
2019                                 unset($datarray['author-id']);
2020                         }
2021
2022                         if ($contact['network'] != Protocol::FEED) {
2023                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2024                                 $datarray["guid"] = System::createUUID();
2025                                 unset($datarray["plink"]);
2026                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2027                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2028                                 $datarray["extid"] = Protocol::DFRN;
2029                                 $urlpart = parse_url($datarray2['author-link']);
2030                                 $datarray["app"] = $urlpart["host"];
2031                                 if (!empty($old_uri_id)) {
2032                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2033                                 }
2034
2035                                 unset($datarray["parent-uri"]);
2036                                 unset($datarray["thr-parent"]);
2037                         } else {
2038                                 $datarray['private'] = self::PUBLIC;
2039                         }
2040                 }
2041
2042                 if ($contact['network'] != Protocol::FEED) {
2043                         // Store the original post
2044                         $result = self::insert($datarray2);
2045                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2046                 } else {
2047                         $datarray["app"] = "Feed";
2048                         $result = true;
2049                 }
2050
2051                 return (bool)$result;
2052         }
2053
2054         /**
2055          *
2056          * @param string $s
2057          * @param int    $uid
2058          * @param array  $item
2059          * @param int    $cid
2060          * @return string
2061          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2062          * @throws \ImagickException
2063          */
2064         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2065         {
2066                 if (DI::config()->get('system', 'disable_embedded')) {
2067                         return $s;
2068                 }
2069
2070                 Logger::info('check for photos');
2071                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2072
2073                 $orig_body = $s;
2074                 $new_body = '';
2075
2076                 $img_start = strpos($orig_body, '[img');
2077                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2078                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2079
2080                 while (($img_st_close !== false) && ($img_len !== false)) {
2081                         $img_st_close++; // make it point to AFTER the closing bracket
2082                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2083
2084                         Logger::info('found photo', ['image' => $image]);
2085
2086                         if (stristr($image, $site . '/photo/')) {
2087                                 // Only embed locally hosted photos
2088                                 $replace = false;
2089                                 $i = basename($image);
2090                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2091                                 $x = strpos($i, '-');
2092
2093                                 if ($x) {
2094                                         $res = substr($i, $x + 1);
2095                                         $i = substr($i, 0, $x);
2096                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2097                                         if (DBA::isResult($photo)) {
2098                                                 /*
2099                                                  * Check to see if we should replace this photo link with an embedded image
2100                                                  * 1. No need to do so if the photo is public
2101                                                  * 2. If there's a contact-id provided, see if they're in the access list
2102                                                  *    for the photo. If so, embed it.
2103                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2104                                                  *    permissions, regardless of order but first check to see if they're an exact
2105                                                  *    match to save some processing overhead.
2106                                                  */
2107                                                 if (self::hasPermissions($photo)) {
2108                                                         if ($cid) {
2109                                                                 $recips = self::enumeratePermissions($photo);
2110                                                                 if (in_array($cid, $recips)) {
2111                                                                         $replace = true;
2112                                                                 }
2113                                                         } elseif ($item) {
2114                                                                 if (self::samePermissions($uid, $item, $photo)) {
2115                                                                         $replace = true;
2116                                                                 }
2117                                                         }
2118                                                 }
2119                                                 if ($replace) {
2120                                                         $photo_img = Photo::getImageForPhoto($photo);
2121                                                         // If a custom width and height were specified, apply before embedding
2122                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2123                                                                 Logger::info('scaling photo');
2124
2125                                                                 $width = intval($match[1]);
2126                                                                 $height = intval($match[2]);
2127
2128                                                                 $photo_img->scaleDown(max($width, $height));
2129                                                         }
2130
2131                                                         $data = $photo_img->asString();
2132                                                         $type = $photo_img->getType();
2133
2134                                                         Logger::info('replacing photo');
2135                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2136                                                         Logger::debug('replaced', ['image' => $image]);
2137                                                 }
2138                                         }
2139                                 }
2140                         }
2141
2142                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2143                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2144                         if ($orig_body === false) {
2145                                 $orig_body = '';
2146                         }
2147
2148                         $img_start = strpos($orig_body, '[img');
2149                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2150                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2151                 }
2152
2153                 $new_body = $new_body . $orig_body;
2154
2155                 return $new_body;
2156         }
2157
2158         private static function hasPermissions($obj)
2159         {
2160                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2161                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2162         }
2163
2164         private static function samePermissions($uid, $obj1, $obj2)
2165         {
2166                 // first part is easy. Check that these are exactly the same.
2167                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2168                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2169                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2170                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2171                         return true;
2172                 }
2173
2174                 // This is harder. Parse all the permissions and compare the resulting set.
2175                 $recipients1 = self::enumeratePermissions($obj1);
2176                 $recipients2 = self::enumeratePermissions($obj2);
2177                 sort($recipients1);
2178                 sort($recipients2);
2179
2180                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2181                 return ($recipients1 == $recipients2);
2182         }
2183
2184         /**
2185          * Returns an array of contact-ids that are allowed to see this object
2186          *
2187          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2188          * @param bool  $check_dead Prunes unavailable contacts from the result
2189          * @return array
2190          * @throws \Exception
2191          */
2192         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2193         {
2194                 $aclFormater = DI::aclFormatter();
2195
2196                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2197                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2198                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2199                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2200                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2201                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2202                 $recipients   = array_diff($recipients, $deny);
2203                 return $recipients;
2204         }
2205
2206         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2207         {
2208                 if (!$uid || ($days < 1)) {
2209                         return;
2210                 }
2211
2212                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2213                         $uid, GRAVITY_PARENT];
2214
2215                 /*
2216                  * $expire_network_only = save your own wall posts
2217                  * and just expire conversations started by others
2218                  */
2219                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2220
2221                 if ($expire_network_only) {
2222                         $condition[0] .= " AND NOT `wall`";
2223                 }
2224
2225                 if ($network != "") {
2226                         $condition[0] .= " AND `network` = ?";
2227                         $condition[] = $network;
2228                 }
2229
2230                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2231                 $condition[] = $days;
2232
2233                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2234
2235                 if (!DBA::isResult($items)) {
2236                         return;
2237                 }
2238
2239                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2240
2241                 // Forcing expiring of items - but not notes and marked items
2242                 if ($force) {
2243                         $expire_items = true;
2244                 }
2245
2246                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2247                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2248                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2249
2250                 $expired = 0;
2251
2252                 $priority = DI::config()->get('system', 'expire-notify-priority');
2253
2254                 while ($item = Post::fetch($items)) {
2255                         // don't expire filed items
2256                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2257                                 continue;
2258                         }
2259
2260                         // Only expire posts, not photos and photo comments
2261
2262                         if (!$expire_photos && !empty($item['resource-id'])) {
2263                                 continue;
2264                         } elseif (!$expire_starred && intval($item['starred'])) {
2265                                 continue;
2266                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2267                                 continue;
2268                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2269                                 continue;
2270                         }
2271
2272                         self::markForDeletionById($item['id'], $priority);
2273
2274                         ++$expired;
2275                 }
2276                 DBA::close($items);
2277                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2278         }
2279
2280         public static function firstPostDate($uid, $wall = false)
2281         {
2282                 $user = User::getById($uid, ['register_date']);
2283                 if (empty($user)) {
2284                         return false;
2285                 }
2286
2287                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2288                         $uid, $wall, $user['register_date']];
2289                 $params = ['order' => ['received' => false]];
2290                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2291                 if (DBA::isResult($thread)) {
2292                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2293                         return $postdate;
2294                 }
2295                 return false;
2296         }
2297
2298         /**
2299          * add/remove activity to an item
2300          *
2301          * Toggle activities as like,dislike,attend of an item
2302          *
2303          * @param int $item_id
2304          * @param string $verb
2305          *            Activity verb. One of
2306          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2307          *            attendno, unattendno, attendmaybe, unattendmaybe,
2308          *            announce, unannouce
2309          * @return bool
2310          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2311          * @throws \ImagickException
2312          * @hook  'post_local_end'
2313          *            array $arr
2314          *            'post_id' => ID of posted item
2315          */
2316         public static function performActivity(int $item_id, string $verb, int $uid)
2317         {
2318                 if (empty($uid)) {
2319                         return false;
2320                 }
2321
2322                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2323
2324                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2325                 if (!DBA::isResult($item)) {
2326                         Logger::log('like: unknown item ' . $item_id);
2327                         return false;
2328                 }
2329
2330                 $uri_id = $item['uri-id'];
2331
2332                 if (!in_array($item['uid'], [0, $uid])) {
2333                         return false;
2334                 }
2335
2336                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2337                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2338                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2339                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2340                                 if (!DBA::isResult($item)) {
2341                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2342                                         return false;
2343                                 }
2344                         }
2345                 }
2346
2347                 // Retrieves the local post owner
2348                 $owner = User::getOwnerDataById($uid);
2349                 if (empty($owner)) {
2350                         Logger::info('Empty owner for user', ['uid' => $uid]);
2351                         return false;
2352                 }
2353
2354                 // Retrieve the current logged in user's public contact
2355                 $author_id = Contact::getIdForURL($owner['url']);
2356                 if (empty($author_id)) {
2357                         Logger::info('Empty public contact');
2358                         return false;
2359                 }
2360
2361                 $activity = null;
2362                 switch ($verb) {
2363                         case 'like':
2364                         case 'unlike':
2365                                 $activity = Activity::LIKE;
2366                                 break;
2367                         case 'dislike':
2368                         case 'undislike':
2369                                 $activity = Activity::DISLIKE;
2370                                 break;
2371                         case 'attendyes':
2372                         case 'unattendyes':
2373                                 $activity = Activity::ATTEND;
2374                                 break;
2375                         case 'attendno':
2376                         case 'unattendno':
2377                                 $activity = Activity::ATTENDNO;
2378                                 break;
2379                         case 'attendmaybe':
2380                         case 'unattendmaybe':
2381                                 $activity = Activity::ATTENDMAYBE;
2382                                 break;
2383                         case 'follow':
2384                         case 'unfollow':
2385                                 $activity = Activity::FOLLOW;
2386                                 break;
2387                         case 'announce':
2388                         case 'unannounce':
2389                                 $activity = Activity::ANNOUNCE;
2390                                 break;
2391                         default:
2392                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2393                                 return false;
2394                 }
2395
2396                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2397
2398                 // Enable activity toggling instead of on/off
2399                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2400
2401                 // Look for an existing verb row
2402                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2403                 if ($event_verb_flag) {
2404                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2405
2406                         // Translate to the index based activity index
2407                         $vids = [];
2408                         foreach ($verbs as $verb) {
2409                                 $vids[] = Verb::getID($verb);
2410                         }
2411                 } else {
2412                         $vids = Verb::getID($activity);
2413                 }
2414
2415                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2416                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2417                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2418
2419                 if (DBA::isResult($like_item)) {
2420                         /**
2421                          * Truth table for existing activities
2422                          *
2423                          * |          Inputs            ||      Outputs      |
2424                          * |----------------------------||-------------------|
2425                          * |  Mode  | Event | Same verb || Delete? | Return? |
2426                          * |--------|-------|-----------||---------|---------|
2427                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2428                          * | create |  Yes  |    No     ||   Yes   |   No    |
2429                          * | create |  No   |    Yes    ||   No    |   Yes   |
2430                          * | create |  No   |    No     ||        N/A†       |
2431                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2432                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2433                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2434                          * | delete |  No   |    No     ||        N/A†       |
2435                          * |--------|-------|-----------||---------|---------|
2436                          * |   A    |   B   |     C     || A xor C | !B or C |
2437                          *
2438                          * † Can't happen: It's impossible to find an existing non-event activity without
2439                          *                 the same verb because we are only looking for this single verb.
2440                          *
2441                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2442                          */
2443                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2444                                 self::markForDeletionById($like_item['id']);
2445                         }
2446
2447                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2448                                 return true;
2449                         }
2450                 }
2451
2452                 // No need to go further if we aren't creating anything
2453                 if ($mode == 'delete') {
2454                         return true;
2455                 }
2456
2457                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2458
2459                 $new_item = [
2460                         'guid'          => System::createUUID(),
2461                         'uri'           => self::newURI($item['uid']),
2462                         'uid'           => $item['uid'],
2463                         'contact-id'    => $owner['id'],
2464                         'wall'          => $item['wall'],
2465                         'origin'        => 1,
2466                         'network'       => Protocol::DFRN,
2467                         'protocol'      => Conversation::PARCEL_DIRECT,
2468                         'direction'     => Conversation::PUSH,
2469                         'gravity'       => GRAVITY_ACTIVITY,
2470                         'parent'        => $item['id'],
2471                         'thr-parent'    => $item['uri'],
2472                         'owner-id'      => $author_id,
2473                         'author-id'     => $author_id,
2474                         'body'          => $activity,
2475                         'verb'          => $activity,
2476                         'object-type'   => $objtype,
2477                         'allow_cid'     => $item['allow_cid'],
2478                         'allow_gid'     => $item['allow_gid'],
2479                         'deny_cid'      => $item['deny_cid'],
2480                         'deny_gid'      => $item['deny_gid'],
2481                         'visible'       => 1,
2482                         'unseen'        => 1,
2483                 ];
2484
2485                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2486                 if (!empty($signed)) {
2487                         $new_item['diaspora_signed_text'] = json_encode($signed);
2488                 }
2489
2490                 $new_item_id = self::insert($new_item);
2491
2492                 // If the parent item isn't visible then set it to visible
2493                 if (!$item['visible']) {
2494                         self::update(['visible' => true], ['id' => $item['id']]);
2495                 }
2496
2497                 $new_item['id'] = $new_item_id;
2498
2499                 Hook::callAll('post_local_end', $new_item);
2500
2501                 return true;
2502         }
2503
2504         /**
2505          * Fetch the SQL condition for the given user id
2506          *
2507          * @param integer $owner_id User ID for which the permissions should be fetched
2508          * @return array condition
2509          */
2510         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2511         {
2512                 $local_user = local_user();
2513                 $remote_user = Session::getRemoteContactID($owner_id);
2514
2515                 // default permissions - anonymous user
2516                 $condition = ["`private` != ?", self::PRIVATE];
2517
2518                 if ($local_user && ($local_user == $owner_id)) {
2519                         // Profile owner - everything is visible
2520                         $condition = [];
2521                 } elseif ($remote_user) {
2522                          // Authenticated visitor - fetch the matching permissionsets
2523                         $set = PermissionSet::get($owner_id, $remote_user);
2524                         if (!empty($set)) {
2525                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2526                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2527                                         self::PRIVATE, self::PRIVATE];
2528                                 $condition = array_merge($condition, $set);
2529                         }
2530                 }
2531
2532                 return $condition;
2533         }
2534
2535         /**
2536          * Get a permission SQL string for the given user
2537          *
2538          * @param int $owner_id
2539          * @param string $table
2540          * @return string
2541          */
2542         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2543         {
2544                 $local_user = local_user();
2545                 $remote_user = Session::getRemoteContactID($owner_id);
2546
2547                 if (!empty($table)) {
2548                         $table = DBA::quoteIdentifier($table) . '.';
2549                 }
2550
2551                 /*
2552                  * Construct permissions
2553                  *
2554                  * default permissions - anonymous user
2555                  */
2556                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2557
2558                 // Profile owner - everything is visible
2559                 if ($local_user && ($local_user == $owner_id)) {
2560                         $sql = '';
2561                 } elseif ($remote_user) {
2562                         /*
2563                          * Authenticated visitor. Unless pre-verified,
2564                          * check that the contact belongs to this $owner_id
2565                          * and load the groups the visitor belongs to.
2566                          * If pre-verified, the caller is expected to have already
2567                          * done this and passed the groups into this function.
2568                          */
2569                         $set = PermissionSet::get($owner_id, $remote_user);
2570
2571                         if (!empty($set)) {
2572                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
2573                         } else {
2574                                 $sql_set = '';
2575                         }
2576
2577                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2578                 }
2579
2580                 return $sql;
2581         }
2582
2583         /**
2584          * get translated item type
2585          *
2586          * @param array                $item
2587          * @param \Friendica\Core\L10n $l10n
2588          * @return string
2589          */
2590         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2591         {
2592                 if (!empty($item['event-id'])) {
2593                         return $l10n->t('event');
2594                 } elseif (!empty($item['resource-id'])) {
2595                         return $l10n->t('photo');
2596                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2597                         return $l10n->t('activity');
2598                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2599                         return $l10n->t('comment');
2600                 }
2601
2602                 return $l10n->t('post');
2603         }
2604
2605         /**
2606          * Sets the "rendered-html" field of the provided item
2607          *
2608          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2609          *
2610          * @param array $item
2611          *
2612          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2613          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2614          */
2615         public static function putInCache(&$item)
2616         {
2617                 // Save original body to prevent addons to modify it
2618                 $body = $item['body'];
2619
2620                 $rendered_hash = $item['rendered-hash'] ?? '';
2621                 $rendered_html = $item['rendered-html'] ?? '';
2622
2623                 if ($rendered_hash == ''
2624                         || $rendered_html == ''
2625                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2626                         || DI::config()->get('system', 'ignore_cache')
2627                 ) {
2628                         self::addRedirToImageTags($item);
2629
2630                         $item['rendered-html'] = BBCode::convert($item['body']);
2631                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2632
2633                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2634                         Hook::callAll('put_item_in_cache', $hook_data);
2635                         $item['rendered-html'] = $hook_data['rendered-html'];
2636                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2637                         unset($hook_data);
2638
2639                         // Update if the generated values differ from the existing ones
2640                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2641                                 self::update(
2642                                         [
2643                                                 'rendered-html' => $item['rendered-html'],
2644                                                 'rendered-hash' => $item['rendered-hash']
2645                                         ],
2646                                         ['id' => $item['id']]
2647                                 );
2648                         }
2649                 }
2650
2651                 $item['body'] = $body;
2652         }
2653
2654         /**
2655          * Find any non-embedded images in private items and add redir links to them
2656          *
2657          * @param array &$item The field array of an item row
2658          */
2659         private static function addRedirToImageTags(array &$item)
2660         {
2661                 $app = DI::app();
2662
2663                 $matches = [];
2664                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2665                 if ($cnt) {
2666                         foreach ($matches as $mtch) {
2667                                 if (strpos($mtch[1], '/redir') !== false) {
2668                                         continue;
2669                                 }
2670
2671                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
2672                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2673                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2674                                 }
2675                         }
2676                 }
2677         }
2678
2679         /**
2680          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2681          * If attach is true, also add icons for item attachments.
2682          *
2683          * @param array   $item
2684          * @param boolean $attach
2685          * @param boolean $is_preview
2686          * @return string item body html
2687          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2688          * @throws \ImagickException
2689          * @hook  prepare_body_init item array before any work
2690          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2691          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2692          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2693          */
2694         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2695         {
2696                 $a = DI::app();
2697                 Hook::callAll('prepare_body_init', $item);
2698
2699                 // In order to provide theme developers more possibilities, event items
2700                 // are treated differently.
2701                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2702                         $ev = Event::getItemHTML($item);
2703                         return $ev;
2704                 }
2705
2706                 $tags = Tag::populateFromItem($item);
2707
2708                 $item['tags'] = $tags['tags'];
2709                 $item['hashtags'] = $tags['hashtags'];
2710                 $item['mentions'] = $tags['mentions'];
2711
2712                 // Compile eventual content filter reasons
2713                 $filter_reasons = [];
2714                 if (!$is_preview && public_contact() != $item['author-id']) {
2715                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2716                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2717                         }
2718
2719                         $hook_data = [
2720                                 'item' => $item,
2721                                 'filter_reasons' => $filter_reasons
2722                         ];
2723                         Hook::callAll('prepare_body_content_filter', $hook_data);
2724                         $filter_reasons = $hook_data['filter_reasons'];
2725                         unset($hook_data);
2726                 }
2727
2728                 $body = $item['body'] ?? '';
2729                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2730                 self::putInCache($item);
2731                 $item['body'] = $body;
2732                 $s = $item["rendered-html"];
2733
2734                 $hook_data = [
2735                         'item' => $item,
2736                         'html' => $s,
2737                         'preview' => $is_preview,
2738                         'filter_reasons' => $filter_reasons
2739                 ];
2740                 Hook::callAll('prepare_body', $hook_data);
2741                 $s = $hook_data['html'];
2742                 unset($hook_data);
2743
2744                 if (!$attach) {
2745                         // Replace the blockquotes with quotes that are used in mails.
2746                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2747                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2748                         return $s;
2749                 }
2750
2751                 $shared = BBCode::fetchShareAttributes($item['body']);
2752                 if (!empty($shared['guid'])) {
2753                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2754                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2755                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2756                         $attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2757                         $s = self::addVisualAttachments($attachments, $item, $s, true);
2758                         $s = self::addLinkAttachment($attachments, $body, $s, true, []);
2759                         $s = self::addNonVisualAttachments($attachments, $item, $s, true);
2760                         $shared_links = array_merge($shared_links, array_column($attachments['visual'], 'url'));
2761                         $shared_links = array_merge($shared_links, array_column($attachments['link'], 'url'));
2762                         $shared_links = array_merge($shared_links, array_column($attachments['additional'], 'url'));
2763                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2764                 } else {
2765                         $shared_uri_id = 0;
2766                         $shared_links = [];
2767                 }
2768
2769                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links);
2770                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2771                 $s = self::addLinkAttachment($attachments, $body, $s, false, $shared_links);
2772                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2773
2774                 // Map.
2775                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2776                         $x = Map::byCoordinates(trim($item['coord']));
2777                         if ($x) {
2778                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2779                         }
2780                 }
2781
2782                 // Replace friendica image url size with theme preference.
2783                 if (!empty($a->theme_info['item_image_size'])) {
2784                         $ps = $a->theme_info['item_image_size'];
2785                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2786                 }
2787
2788                 $s = HTML::applyContentFilter($s, $filter_reasons);
2789
2790                 $hook_data = ['item' => $item, 'html' => $s];
2791                 Hook::callAll('prepare_body_final', $hook_data);
2792
2793                 return $hook_data['html'];
2794         }
2795
2796         /**
2797          * Check if the body contains a link
2798          *
2799          * @param string $body
2800          * @param string $url
2801          * @param int    $type
2802          * @return bool
2803          */
2804         public static function containsLink(string $body, string $url, int $type = 0)
2805         {
2806                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2807                 $urlparts = parse_url($url);
2808                 unset($urlparts['query']);
2809                 unset($urlparts['fragment']);
2810                 $url = Network::unparseURL($urlparts);
2811
2812                 // Remove media links to only search in embedded content
2813                 // @todo Check images for image link, audio for audio links, ...
2814                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2815                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2816                 }
2817
2818                 if (strpos($body, $url)) {
2819                         return true;
2820                 }
2821                 foreach ([0, 1, 2] as $size) {
2822                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2823                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2824                                 return true;
2825                         }
2826                 }
2827                 return false;
2828         }
2829
2830         /**
2831          * Add visual attachments to the content
2832          *
2833          * @param array $attachments
2834          * @param array $item
2835          * @param string $content
2836          * @return string modified content
2837          */
2838         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2839         {
2840                 $stamp1 = microtime(true);
2841                 $leading = '';
2842                 $trailing = '';
2843
2844                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2845                 foreach ($attachments['visual'] as $attachment) {
2846                         if (self::containsLink($item['body'], $attachment['url'], $attachment['type'])) {
2847                                 continue;
2848                         }
2849
2850                         $author = ['uid' => 0, 'id' => $item['author-id'],
2851                                 'network' => $item['author-network'], 'url' => $item['author-link']];
2852                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
2853
2854                         if (!empty($attachment['preview'])) {
2855                                 $preview_url = Proxy::proxifyUrl(Contact::magicLinkByContact($author, $attachment['preview']));
2856                         } else {
2857                                 $preview_url = '';
2858                         }
2859
2860                         if (($attachment['filetype'] == 'video')) {
2861                                 /// @todo Move the template to /content as well
2862                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2863                                         '$video' => [
2864                                                 'id'      => $attachment['id'],
2865                                                 'src'     => $the_url,
2866                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2867                                                 'preview' => $preview_url,
2868                                                 'mime'    => $attachment['mimetype'],
2869                                         ],
2870                                 ]);
2871                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
2872                                         $leading .= $media;
2873                                 } else {
2874                                         $trailing .= $media;
2875                                 }
2876                         } elseif ($attachment['filetype'] == 'audio') {
2877                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2878                                         '$audio' => [
2879                                                 'id'     => $attachment['id'],
2880                                                 'src'    => $the_url,
2881                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2882                                                 'mime'   => $attachment['mimetype'],
2883                                         ],
2884                                 ]);
2885                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
2886                                         $leading .= $media;
2887                                 } else {
2888                                         $trailing .= $media;
2889                                 }
2890                         } elseif ($attachment['filetype'] == 'image') {
2891                                 if (empty($preview_url) && (max($attachment['width'], $attachment['height']) > 600)) {
2892                                         $preview_url = Proxy::proxifyUrl($the_url, false, ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
2893                                 }
2894                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2895                                         '$image' => [
2896                                                 'src'    => Proxy::proxifyUrl($the_url),
2897                                                 'preview' => $preview_url,
2898                                                 'attachment'   => $attachment,
2899                                         ],
2900                                 ]);
2901                                 // On Diaspora posts the attached pictures are leading
2902                                 if ($item['network'] == Protocol::DIASPORA) {
2903                                         $leading .= $media;
2904                                 } else {
2905                                         $trailing .= $media;
2906                                 }
2907                         }
2908                 }
2909
2910                 if ($shared) {
2911                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
2912                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
2913                 } else {
2914                         if ($leading != '') {
2915                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
2916                         }
2917
2918                         if ($trailing != '') {
2919                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
2920                         }
2921                 }
2922
2923                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
2924                 return $content;
2925         }
2926
2927         /**
2928          * Add link attachment to the content
2929          *
2930          * @param array  $attachments
2931          * @param string $body
2932          * @param string $content
2933          * @param bool   $shared
2934          * @param array  $ignore_links A list of URLs to ignore
2935          * @return string modified content
2936          */
2937         private static function addLinkAttachment(array $attachments, string $body, string $content, bool $shared, array $ignore_links)
2938         {
2939                 $stamp1 = microtime(true);
2940                 // @ToDo Check only for audio and video
2941                 $preview = empty($attachments['visual']);
2942
2943                 if (!empty($attachments['link'])) {
2944                         foreach ($attachments['link'] as $link) {
2945                                 $found = false;
2946                                 foreach ($ignore_links as $ignore_link) {
2947                                         if (Strings::compareLink($link['url'], $ignore_link)) {
2948                                                 $found = true;
2949                                         }
2950                                 }
2951                                 // @todo Judge between the links to use the one with most information
2952                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
2953                                         (empty($attachment['name']) && !empty($link['name'])) ||
2954                                         (empty($attachment['description']) && !empty($link['description'])) ||
2955                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
2956                                         $attachment = $link;
2957                                 }
2958                         }
2959                 }
2960
2961                 if (!empty($attachment)) {
2962                         $data = [
2963                                 'after' => '',
2964                                 'author_name' => $attachment['author-name'] ?? '',
2965                                 'author_url' =>  $attachment['author-url'] ?? '',
2966                                 'description' => $attachment['description'] ?? '',
2967                                 'image' => '',
2968                                 'preview' => '',
2969                                 'provider_name' => $attachment['publisher-name'] ?? '',
2970                                 'provider_url' => $attachment['publisher-url'] ?? '',
2971                                 'text' => '',
2972                                 'title' => $attachment['name'] ?? '',
2973                                 'type' => 'link',
2974                                 'url' => $attachment['url']];
2975
2976                         if ($preview) {
2977                                 if ($attachment['preview-width'] >= 500) {
2978                                         $data['image'] = $attachment['preview'] ?? '';
2979                                 } else {
2980                                         $data['preview'] = $attachment['preview'] ?? '';
2981                                 }
2982                         }
2983
2984                         if (!empty($data['description']) && !empty($content)) {
2985                                 similar_text($data['description'], $content, $percent);
2986                         } else {
2987                                 $percent = 0;
2988                         }
2989
2990                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
2991                                 $data['description'] = '';
2992                         }
2993
2994                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
2995                                 $data['author_name'] = '';
2996                         }
2997
2998                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
2999                                 $data['author_url'] = '';
3000                         }
3001                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3002                         $data = BBCode::getAttachmentData($match[1]);
3003                 }
3004                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
3005
3006                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3007                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3008                                 $parts = parse_url($data['url']);
3009                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3010                                         if (empty($data['provider_name'])) {
3011                                                 $data['provider_name'] = $parts['host'];
3012                                         }
3013                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3014                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3015
3016                                                 if (!empty($parts['port'])) {
3017                                                         $data['provider_url'] .= ':' . $parts['port'];
3018                                                 }
3019                                         }
3020                                 }
3021
3022                                 // @todo Use a template
3023                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data);
3024                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3025                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3026                                         '$url'  => $data['url'],
3027                                         '$title' => $data['title'],
3028                                 ]);
3029                         } else {
3030                                 return $content;
3031                         }
3032
3033                         if ($shared) {
3034                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3035                         } else {
3036                                 return $content . $rendered;
3037                         }
3038                 }
3039                 return $content;
3040         }
3041
3042         /**
3043          * Add non visual attachments to the content
3044          *
3045          * @param array $attachments
3046          * @param array $item
3047          * @param string $content
3048          * @return string modified content
3049          */
3050         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3051         {
3052                 $stamp1 = microtime(true);
3053                 $trailing = '';
3054                 foreach ($attachments['additional'] as $attachment) {
3055                         if (strpos($item['body'], $attachment['url'])) {
3056                                 continue;
3057                         }
3058
3059                         $author = ['uid' => 0, 'id' => $item['author-id'],
3060                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3061                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3062
3063                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3064
3065                         if (!empty($attachment['size'])) {
3066                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3067                         }
3068
3069                         /// @todo Use a template
3070                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3071                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3072                 }
3073
3074                 if ($trailing != '') {
3075                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3076                 }
3077
3078                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
3079                 return $content;
3080         }
3081
3082         /**
3083          * get private link for item
3084          *
3085          * @param array $item
3086          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3087          * @throws \Exception
3088          */
3089         public static function getPlink($item)
3090         {
3091                 if (local_user()) {
3092                         $ret = [
3093                                 'href' => "display/" . $item['guid'],
3094                                 'orig' => "display/" . $item['guid'],
3095                                 'title' => DI::l10n()->t('View on separate page'),
3096                                 'orig_title' => DI::l10n()->t('View on separate page'),
3097                         ];
3098
3099                         if (!empty($item['plink'])) {
3100                                 $ret['href'] = DI::baseUrl()->remove($item['plink']);
3101                                 $ret['title'] = DI::l10n()->t('Link to source');
3102                         }
3103                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3104                         $ret = [
3105                                 'href' => $item['plink'],
3106                                 'orig' => $item['plink'],
3107                                 'title' => DI::l10n()->t('Link to source'),
3108                                 'orig_title' => DI::l10n()->t('Link to source'),
3109                         ];
3110                 } else {
3111                         $ret = [];
3112                 }
3113
3114                 return $ret;
3115         }
3116
3117         /**
3118          * Is the given item array a post that is sent as starting post to a forum?
3119          *
3120          * @param array $item
3121          * @param array $owner
3122          *
3123          * @return boolean "true" when it is a forum post
3124          */
3125         public static function isForumPost(array $item, array $owner = [])
3126         {
3127                 if (empty($owner)) {
3128                         $owner = User::getOwnerDataById($item['uid']);
3129                         if (empty($owner)) {
3130                                 return false;
3131                         }
3132                 }
3133
3134                 if (($item['author-id'] == $item['owner-id']) ||
3135                         ($owner['id'] == $item['contact-id']) ||
3136                         ($item['uri-id'] != $item['parent-uri-id']) ||
3137                         $item['origin']) {
3138                         return false;
3139                 }
3140
3141                 return Contact::isForum($item['contact-id']);
3142         }
3143
3144         /**
3145          * Search item id for given URI or plink
3146          *
3147          * @param string $uri
3148          * @param integer $uid
3149          *
3150          * @return integer item id
3151          */
3152         public static function searchByLink($uri, $uid = 0)
3153         {
3154                 $ssl_uri = str_replace('http://', 'https://', $uri);
3155                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3156
3157                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3158                 if (DBA::isResult($item)) {
3159                         return $item['id'];
3160                 }
3161
3162                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3163                 if (DBA::isResult($item)) {
3164                         return $item['id'];
3165                 }
3166
3167                 return 0;
3168         }
3169
3170         /**
3171          * Return the URI for a link to the post
3172          *
3173          * @param string $uri URI or link to post
3174          *
3175          * @return string URI
3176          */
3177         public static function getURIByLink(string $uri)
3178         {
3179                 $ssl_uri = str_replace('http://', 'https://', $uri);
3180                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3181
3182                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3183                 if (DBA::isResult($item)) {
3184                         return $item['uri'];
3185                 }
3186
3187                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3188                 if (DBA::isResult($item)) {
3189                         return $item['uri'];
3190                 }
3191
3192                 return '';
3193         }
3194
3195         /**
3196          * Fetches item for given URI or plink
3197          *
3198          * @param string $uri
3199          * @param integer $uid
3200          *
3201          * @return integer item id
3202          */
3203         public static function fetchByLink(string $uri, int $uid = 0)
3204         {
3205                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3206                 $item_id = self::searchByLink($uri, $uid);
3207                 if (!empty($item_id)) {
3208                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3209                         return $item_id;
3210                 }
3211
3212                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3213                         $item_id = self::searchByLink($fetched_uri, $uid);
3214                 } else {
3215                         $item_id = Diaspora::fetchByURL($uri);
3216                 }
3217
3218                 if (!empty($item_id)) {
3219                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3220                         return $item_id;
3221                 }
3222
3223                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3224                 return 0;
3225         }
3226
3227         /**
3228          * Return share data from an item array (if the item is shared item)
3229          * We are providing the complete Item array, because at some time in the future
3230          * we hopefully will define these values not in the body anymore but in some item fields.
3231          * This function is meant to replace all similar functions in the system.
3232          *
3233          * @param array $item
3234          *
3235          * @return array with share information
3236          */
3237         public static function getShareArray($item)
3238         {
3239                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3240                         return [];
3241                 }
3242
3243                 $attribute_string = $matches[2];
3244                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3245                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3246                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3247                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3248                         }
3249                 }
3250                 return $attributes;
3251         }
3252
3253         /**
3254          * Fetch item information for shared items from the original items and adds it.
3255          *
3256          * @param array $item
3257          *
3258          * @return array item array with data from the original item
3259          */
3260         public static function addShareDataFromOriginal(array $item)
3261         {
3262                 $shared = self::getShareArray($item);
3263                 if (empty($shared)) {
3264                         return $item;
3265                 }
3266
3267                 // Real reshares always have got a GUID.
3268                 if (empty($shared['guid'])) {
3269                         return $item;
3270                 }
3271
3272                 $uid = $item['uid'] ?? 0;
3273
3274                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3275                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3276                 if (!DBA::isResult($shared_item)) {
3277                         if (empty($shared['link'])) {
3278                                 return $item;
3279                         }
3280
3281                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3282                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3283                         if (empty($id)) {
3284                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3285                                 return $item;
3286                         }
3287
3288                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3289                         if (!DBA::isResult($shared_item)) {
3290                                 return $item;
3291                         }
3292                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3293                 } else {
3294                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3295                 }
3296
3297                 if (!empty($shared_item['title'])) {
3298                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3299                         unset($shared_item['title']);
3300                 } else {
3301                         $body = $shared_item['body'];
3302                 }
3303
3304                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3305                 unset($shared_item['body']);
3306
3307                 return array_merge($item, $shared_item);
3308         }
3309
3310         /**
3311          * Check a prospective item array against user-level permissions
3312          *
3313          * @param array $item Expected keys: uri, gravity, and
3314          *                    author-link if is author-id is set,
3315          *                    owner-link if is owner-id is set,
3316          *                    causer-link if is causer-id is set.
3317          * @param int   $user_id Local user ID
3318          * @return bool
3319          * @throws \Exception
3320          */
3321         protected static function isAllowedByUser(array $item, int $user_id)
3322         {
3323                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3324                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3325                         return false;
3326                 }
3327
3328                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3329                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3330                         return false;
3331                 }
3332
3333                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3334                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3335                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3336                         return false;
3337                 }
3338
3339                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3340                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3341                         return false;
3342                 }
3343
3344                 return true;
3345         }
3346
3347         /**
3348          * Improve the data in shared posts
3349          *
3350          * @param array $item
3351          * @return string body
3352          */
3353         public static function improveSharedDataInBody(array $item)
3354         {
3355                 $shared = BBCode::fetchShareAttributes($item['body']);
3356                 if (empty($shared['link'])) {
3357                         return $item['body'];
3358                 }
3359
3360                 $id = self::fetchByLink($shared['link']);
3361                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3362                 if (!$id) {
3363                         return $item['body'];
3364                 }
3365
3366                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3367                 if (!DBA::isResult($shared_item)) {
3368                         return $item['body'];
3369                 }
3370
3371                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3372
3373                 if (!empty($shared_item['title'])) {
3374                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3375                 }
3376
3377                 $shared_content .= $shared_item['body'];
3378
3379                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3380                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3381                 return $item['body'];
3382         }
3383 }