src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Content\Text;
  11 use Friendica\Core\Addon;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\PConfig;
  15 use Friendica\Core\System;
  16 use Friendica\Core\Worker;
  17 use Friendica\Database\DBM;
  18 use Friendica\Model\Contact;
  19 use Friendica\Model\Conversation;
  20 use Friendica\Model\Group;
  21 use Friendica\Model\Term;
  22 use Friendica\Object\Image;
  23 use Friendica\Protocol\Diaspora;
  24 use Friendica\Protocol\OStatus;
  25 use Friendica\Util\DateTimeFormat;
  26 use Friendica\Util\XML;
  27 use dba;
  28 use Text_LanguageDetect;
  29
  30 require_once 'boot.php';
  31 require_once 'include/items.php';
  32 require_once 'include/text.php';
  33
  34 class Item extends BaseObject
  35 {
  36         /**
  37          * @brief Update existing item entries
  38          *
  39          * @param array $fields The fields that are to be changed
  40          * @param array $condition The condition for finding the item entries
  41          *
  42          * In the future we may have to change permissions as well.
  43          * Then we had to add the user id as third parameter.
  44          *
  45          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
  46          *
  47          * @return integer|boolean number of affected rows - or "false" if there was an error
  48          */
  49         public static function update(array $fields, array $condition)
  50         {
  51                 if (empty($condition) || empty($fields)) {
  52                         return false;
  53                 }
  54
  55                 // To ensure the data integrity we do it in an transaction
  56                 dba::transaction();
  57
  58                 // We cannot simply expand the condition to check for origin entries
  59                 // The condition needn't to be a simple array but could be a complex condition.
  60                 // And we have to execute this query before the update to ensure to fetch the same data.
  61                 $items = dba::select('item', ['id', 'origin'], $condition);
  62
  63                 $success = dba::update('item', $fields, $condition);
  64
  65                 if (!$success) {
  66                         dba::close($items);
  67                         dba::rollback();
  68                         return false;
  69                 }
  70
  71                 $rows = dba::affected_rows();
  72
  73                 while ($item = dba::fetch($items)) {
  74                         Term::insertFromTagFieldByItemId($item['id']);
  75                         Term::insertFromFileFieldByItemId($item['id']);
  76                         self::updateThread($item['id']);
  77
  78                         // We only need to notfiy others when it is an original entry from us.
  79                         // Only call the notifier when the item has some content relevant change.
  80                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
  81                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
  82                         }
  83                 }
  84
  85                 dba::close($items);
  86                 dba::commit();
  87                 return $rows;
  88         }
  89
  90         /**
  91          * @brief Delete an item and notify others about it - if it was ours
  92          *
  93          * @param array $condition The condition for finding the item entries
  94          * @param integer $priority Priority for the notification
  95          */
  96         public static function delete($condition, $priority = PRIORITY_HIGH)
  97         {
  98                 $items = dba::select('item', ['id'], $condition);
  99                 while ($item = dba::fetch($items)) {
 100                         self::deleteById($item['id'], $priority);
 101                 }
 102                 dba::close($items);
 103         }
 104
 105         /**
 106          * @brief Delete an item for an user and notify others about it - if it was ours
 107          *
 108          * @param array $condition The condition for finding the item entries
 109          * @param integer $uid User who wants to delete this item
 110          */
 111         public static function deleteForUser($condition, $uid)
 112         {
 113                 if ($uid == 0) {
 114                         return;
 115                 }
 116
 117                 $items = dba::select('item', ['id', 'uid'], $condition);
 118                 while ($item = dba::fetch($items)) {
 119                         // "Deleting" global items just means hiding them
 120                         if ($item['uid'] == 0) {
 121                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 122                         } elseif ($item['uid'] == $uid) {
 123                                 self::deleteById($item['id'], PRIORITY_HIGH);
 124                         } else {
 125                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 126                         }
 127                 }
 128                 dba::close($items);
 129         }
 130
 131         /**
 132          * @brief Delete an item and notify others about it - if it was ours
 133          *
 134          * @param integer $item_id Item ID that should be delete
 135          * @param integer $priority Priority for the notification
 136          *
 137          * @return boolean success
 138          */
 139         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 140         {
 141                 // locate item to be deleted
 142                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 143                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 144                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 145                 $item = dba::selectFirst('item', $fields, ['id' => $item_id]);
 146                 if (!DBM::is_result($item)) {
 147                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 148                         return false;
 149                 }
 150
 151                 if ($item['deleted']) {
 152                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 153                         return false;
 154                 }
 155
 156                 $parent = dba::selectFirst('item', ['origin'], ['id' => $item['parent']]);
 157                 if (!DBM::is_result($parent)) {
 158                         $parent = ['origin' => false];
 159                 }
 160
 161                 // clean up categories and tags so they don't end up as orphans
 162
 163                 $matches = false;
 164                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 165                 if ($cnt) {
 166                         foreach ($matches as $mtch) {
 167                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 168                         }
 169                 }
 170
 171                 $matches = false;
 172
 173                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 174                 if ($cnt) {
 175                         foreach ($matches as $mtch) {
 176                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 177                         }
 178                 }
 179
 180                 /*
 181                  * If item is a link to a photo resource, nuke all the associated photos
 182                  * (visitors will not have photo resources)
 183                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 184                  * generate a resource-id and therefore aren't intimately linked to the item.
 185                  */
 186                 if (strlen($item['resource-id'])) {
 187                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 188                 }
 189
 190                 // If item is a link to an event, delete the event.
 191                 if (intval($item['event-id'])) {
 192                         Event::delete($item['event-id']);
 193                 }
 194
 195                 // If item has attachments, drop them
 196                 foreach (explode(", ", $item['attach']) as $attach) {
 197                         preg_match("|attach/(\d+)|", $attach, $matches);
 198                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 199                 }
 200
 201                 // Delete tags that had been attached to other items
 202                 self::deleteTagsFromItem($item);
 203
 204                 // Set the item to "deleted"
 205                 dba::update('item', ['deleted' => true, 'title' => '', 'body' => '',
 206                                         'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()],
 207                                 ['id' => $item['id']]);
 208
 209                 Term::insertFromTagFieldByItemId($item['id']);
 210                 Term::insertFromFileFieldByItemId($item['id']);
 211                 self::deleteThread($item['id'], $item['parent-uri']);
 212
 213                 if (!dba::exists('item', ["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 214                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 215                 }
 216
 217                 // If it's the parent of a comment thread, kill all the kids
 218                 if ($item['id'] == $item['parent']) {
 219                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 220                 }
 221
 222                 // Is it our comment and/or our thread?
 223                 if ($item['origin'] || $parent['origin']) {
 224
 225                         // When we delete the original post we will delete all existing copies on the server as well
 226                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 227
 228                         // send the notification upstream/downstream
 229                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 230                 } elseif ($item['uid'] != 0) {
 231
 232                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 233                         $global_item = dba::selectFirst('item', ['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 234                         if (DBM::is_result($global_item)) {
 235                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 236                         }
 237                 }
 238
 239                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 240
 241                 return true;
 242         }
 243
 244         private static function deleteTagsFromItem($item)
 245         {
 246                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 247                         return;
 248                 }
 249
 250                 $xo = XML::parseString($item["object"], false);
 251                 $xt = XML::parseString($item["target"], false);
 252
 253                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 254                         return;
 255                 }
 256
 257                 $i = dba::selectFirst('item', ['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 258                 if (!DBM::is_result($i)) {
 259                         return;
 260                 }
 261
 262                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 263                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 264                 $author_copy = $item["origin"];
 265
 266                 if (($owner_remove && $author_copy) || !$owner_remove) {
 267                         return;
 268                 }
 269
 270                 $tags = explode(',', $i["tag"]);
 271                 $newtags = [];
 272                 if (count($tags)) {
 273                         foreach ($tags as $tag) {
 274                                 if (trim($tag) !== trim($xo->body)) {
 275                                        $newtags[] = trim($tag);
 276                                 }
 277                         }
 278                 }
 279                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 280         }
 281
 282         private static function guid($item, $notify)
 283         {
 284                 $guid = notags(trim($item['guid']));
 285
 286                 if (!empty($guid)) {
 287                         return $guid;
 288                 }
 289
 290                 if ($notify) {
 291                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 292                         // We add the hash of our own host because our host is the original creator of the post.
 293                         $prefix_host = get_app()->get_hostname();
 294                 } else {
 295                         $prefix_host = '';
 296
 297                         // We are only storing the post so we create a GUID from the original hostname.
 298                         if (!empty($item['author-link'])) {
 299                                 $parsed = parse_url($item['author-link']);
 300                                 if (!empty($parsed['host'])) {
 301                                         $prefix_host = $parsed['host'];
 302                                 }
 303                         }
 304
 305                         if (empty($prefix_host) && !empty($item['plink'])) {
 306                                 $parsed = parse_url($item['plink']);
 307                                 if (!empty($parsed['host'])) {
 308                                         $prefix_host = $parsed['host'];
 309                                 }
 310                         }
 311
 312                         if (empty($prefix_host) && !empty($item['uri'])) {
 313                                 $parsed = parse_url($item['uri']);
 314                                 if (!empty($parsed['host'])) {
 315                                         $prefix_host = $parsed['host'];
 316                                 }
 317                         }
 318
 319                         // Is it in the format data@host.tld? - Used for mail contacts
 320                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 321                                 $mailparts = explode('@', $item['author-link']);
 322                                 $prefix_host = array_pop($mailparts);
 323                         }
 324                 }
 325
 326                 if (!empty($item['plink'])) {
 327                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 328                 } elseif (!empty($item['uri'])) {
 329                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 330                 } else {
 331                         $guid = get_guid(32, hash('crc32', $prefix_host));
 332                 }
 333
 334                 return $guid;
 335         }
 336
 337         private static function contactId($item)
 338         {
 339                 $contact_id = (int)$item["contact-id"];
 340
 341                 if (!empty($contact_id)) {
 342                         return $contact_id;
 343                 }
 344                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 345                 /*
 346                  * First we are looking for a suitable contact that matches with the author of the post
 347                  * This is done only for comments
 348                  */
 349                 if ($item['parent-uri'] != $item['uri']) {
 350                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 351                 }
 352
 353                 // If not present then maybe the owner was found
 354                 if ($contact_id == 0) {
 355                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 356                 }
 357
 358                 // Still missing? Then use the "self" contact of the current user
 359                 if ($contact_id == 0) {
 360                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 361                         if (DBM::is_result($self)) {
 362                                 $contact_id = $self["id"];
 363                         }
 364                 }
 365                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 366
 367                 return $contact_id;
 368         }
 369
 370         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 371         {
 372                 $a = get_app();
 373
 374                 // If it is a posting where users should get notifications, then define it as wall posting
 375                 if ($notify) {
 376                         $item['wall'] = 1;
 377                         $item['type'] = 'wall';
 378                         $item['origin'] = 1;
 379                         $item['network'] = NETWORK_DFRN;
 380                         $item['protocol'] = PROTOCOL_DFRN;
 381
 382                         if (is_int($notify)) {
 383                                 $priority = $notify;
 384                         } else {
 385                                 $priority = PRIORITY_HIGH;
 386                         }
 387                 } else {
 388                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 389                 }
 390
 391                 $item['guid'] = self::guid($item, $notify);
 392                 $item['uri'] = notags(trim(defaults($item, 'uri', item_new_uri($a->get_hostname(), $item['uid'], $item['guid']))));
 393
 394                 // Store conversation data
 395                 $item = Conversation::insert($item);
 396
 397                 /*
 398                  * If a Diaspora signature structure was passed in, pull it out of the
 399                  * item array and set it aside for later storage.
 400                  */
 401
 402                 $dsprsig = null;
 403                 if (x($item, 'dsprsig')) {
 404                         $encoded_signature = $item['dsprsig'];
 405                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
 406                         unset($item['dsprsig']);
 407                 }
 408
 409                 if (!empty($item['diaspora_signed_text'])) {
 410                         $diaspora_signed_text = $item['diaspora_signed_text'];
 411                         unset($item['diaspora_signed_text']);
 412                 } else {
 413                         $diaspora_signed_text = '';
 414                 }
 415
 416                 // Converting the plink
 417                 /// @TODO Check if this is really still needed
 418                 if ($item['network'] == NETWORK_OSTATUS) {
 419                         if (isset($item['plink'])) {
 420                                 $item['plink'] = OStatus::convertHref($item['plink']);
 421                         } elseif (isset($item['uri'])) {
 422                                 $item['plink'] = OStatus::convertHref($item['uri']);
 423                         }
 424                 }
 425
 426                 if (!empty($item['thr-parent'])) {
 427                         $item['parent-uri'] = $item['thr-parent'];
 428                 }
 429
 430                 if (x($item, 'gravity')) {
 431                         $item['gravity'] = intval($item['gravity']);
 432                 } elseif ($item['parent-uri'] === $item['uri']) {
 433                         $item['gravity'] = 0;
 434                 } elseif (activity_match($item['verb'],ACTIVITY_POST)) {
 435                         $item['gravity'] = 6;
 436                 } else {
 437                         $item['gravity'] = 6;   // extensible catchall
 438                 }
 439
 440                 $item['type'] = defaults($item, 'type', 'remote');
 441
 442                 $uid = intval($item['uid']);
 443
 444                 // check for create date and expire time
 445                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
 446
 447                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
 448                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 449                         $expire_interval = $user['expire'];
 450                 }
 451
 452                 if (($expire_interval > 0) && !empty($item['created'])) {
 453                         $expire_date = time() - ($expire_interval * 86400);
 454                         $created_date = strtotime($item['created']);
 455                         if ($created_date < $expire_date) {
 456                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
 457                                 return 0;
 458                         }
 459                 }
 460
 461                 /*
 462                  * Do we already have this item?
 463                  * We have to check several networks since Friendica posts could be repeated
 464                  * via OStatus (maybe Diasporsa as well)
 465                  */
 466                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
 467                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
 468                                 trim($item['uri']), $item['uid'],
 469                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
 470                         $existing = dba::selectFirst('item', ['id', 'network'], $condition);
 471                         if (DBM::is_result($existing)) {
 472                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 473                                 if ($uid != 0) {
 474                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
 475                                 }
 476
 477                                 return $existing["id"];
 478                         }
 479                 }
 480
 481                 self::addLanguageInPostopts($item);
 482
 483                 $item['wall']          = intval(defaults($item, 'wall', 0));
 484                 $item['extid']         = trim(defaults($item, 'extid', ''));
 485                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
 486                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
 487                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
 488                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
 489                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
 490                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
 491                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
 492                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
 493                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
 494                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
 495                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 496                 $item['title']         = trim(defaults($item, 'title', ''));
 497                 $item['location']      = trim(defaults($item, 'location', ''));
 498                 $item['coord']         = trim(defaults($item, 'coord', ''));
 499                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
 500                 $item['deleted']       = 0;
 501                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
 502                 $item['verb']          = trim(defaults($item, 'verb', ''));
 503                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
 504                 $item['object']        = trim(defaults($item, 'object', ''));
 505                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
 506                 $item['target']        = trim(defaults($item, 'target', ''));
 507                 $item['plink']         = trim(defaults($item, 'plink', ''));
 508                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
 509                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
 510                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
 511                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
 512                 $item['private']       = intval(defaults($item, 'private', 0));
 513                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
 514                 $item['body']          = trim(defaults($item, 'body', ''));
 515                 $item['tag']           = trim(defaults($item, 'tag', ''));
 516                 $item['attach']        = trim(defaults($item, 'attach', ''));
 517                 $item['app']           = trim(defaults($item, 'app', ''));
 518                 $item['origin']        = intval(defaults($item, 'origin', 0));
 519                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
 520                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
 521                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
 522                 $item['inform']        = trim(defaults($item, 'inform', ''));
 523                 $item['file']          = trim(defaults($item, 'file', ''));
 524
 525                 // When there is no content then we don't post it
 526                 if ($item['body'].$item['title'] == '') {
 527                         return 0;
 528                 }
 529
 530                 // Items cannot be stored before they happen ...
 531                 if ($item['created'] > DateTimeFormat::utcNow()) {
 532                         $item['created'] = DateTimeFormat::utcNow();
 533                 }
 534
 535                 // We haven't invented time travel by now.
 536                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 537                         $item['edited'] = DateTimeFormat::utcNow();
 538                 }
 539
 540                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
 541                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
 542                 }
 543
 544                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
 545
 546                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 547                 $item["contact-id"] = self::contactId($item);
 548
 549                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 550                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 551
 552                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
 553
 554                 if (Contact::isBlocked($item["author-id"])) {
 555                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
 556                         return 0;
 557                 }
 558
 559                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 560                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 561
 562                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
 563
 564                 if (Contact::isBlocked($item["owner-id"])) {
 565                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
 566                         return 0;
 567                 }
 568
 569                 //unset($item['author-link']);
 570                 //unset($item['author-name']);
 571                 //unset($item['author-avatar']);
 572
 573                 //unset($item['owner-link']);
 574                 unset($item['owner-name']);
 575                 unset($item['owner-avatar']);
 576
 577                 if ($item['network'] == NETWORK_PHANTOM) {
 578                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
 579
 580                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
 581                         if (!empty($contact['network'])) {
 582                                 $item['network'] = $contact["network"];
 583                         } else {
 584                                 $item['network'] = NETWORK_DFRN;
 585                         }
 586                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
 587                 }
 588
 589                 // Checking if there is already an item with the same guid
 590                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
 591                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 592                 if (dba::exists('item', $condition)) {
 593                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
 594                         return 0;
 595                 }
 596
 597                 // Check for hashtags in the body and repair or add hashtag links
 598                 self::setHashtags($item);
 599
 600                 $item['thr-parent'] = $item['parent-uri'];
 601
 602                 $notify_type = '';
 603                 $allow_cid = '';
 604                 $allow_gid = '';
 605                 $deny_cid  = '';
 606                 $deny_gid  = '';
 607
 608                 if ($item['parent-uri'] === $item['uri']) {
 609                         $parent_id = 0;
 610                         $parent_deleted = 0;
 611                         $allow_cid = $item['allow_cid'];
 612                         $allow_gid = $item['allow_gid'];
 613                         $deny_cid  = $item['deny_cid'];
 614                         $deny_gid  = $item['deny_gid'];
 615                         $notify_type = 'wall-new';
 616                 } else {
 617                         // find the parent and snarf the item id and ACLs
 618                         // and anything else we need to inherit
 619
 620                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
 621                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 622                                 'wall', 'private', 'forum_mode', 'origin'];
 623                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
 624                         $params = ['order' => ['id' => false]];
 625                         $parent = dba::selectFirst('item', $fields, $condition, $params);
 626
 627                         if (DBM::is_result($parent)) {
 628                                 // is the new message multi-level threaded?
 629                                 // even though we don't support it now, preserve the info
 630                                 // and re-attach to the conversation parent.
 631
 632                                 if ($parent['uri'] != $parent['parent-uri']) {
 633                                         $item['parent-uri'] = $parent['parent-uri'];
 634
 635                                         $condition = ['uri' => $item['parent-uri'],
 636                                                 'parent-uri' => $item['parent-uri'],
 637                                                 'uid' => $item['uid']];
 638                                         $params = ['order' => ['id' => false]];
 639                                         $toplevel_parent = dba::selectFirst('item', $fields, $condition, $params);
 640
 641                                         if (DBM::is_result($toplevel_parent)) {
 642                                                 $parent = $toplevel_parent;
 643                                         }
 644                                 }
 645
 646                                 $parent_id      = $parent['id'];
 647                                 $parent_deleted = $parent['deleted'];
 648                                 $allow_cid      = $parent['allow_cid'];
 649                                 $allow_gid      = $parent['allow_gid'];
 650                                 $deny_cid       = $parent['deny_cid'];
 651                                 $deny_gid       = $parent['deny_gid'];
 652                                 $item['wall']    = $parent['wall'];
 653                                 $notify_type    = 'comment-new';
 654
 655                                 /*
 656                                  * If the parent is private, force privacy for the entire conversation
 657                                  * This differs from the above settings as it subtly allows comments from
 658                                  * email correspondents to be private even if the overall thread is not.
 659                                  */
 660                                 if ($parent['private']) {
 661                                         $item['private'] = $parent['private'];
 662                                 }
 663
 664                                 /*
 665                                  * Edge case. We host a public forum that was originally posted to privately.
 666                                  * The original author commented, but as this is a comment, the permissions
 667                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
 668                                  */
 669                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
 670                                         $item['private'] = 0;
 671                                 }
 672
 673                                 // If its a post from myself then tag the thread as "mention"
 674                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
 675                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
 676                                 if (DBM::is_result($user)) {
 677                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
 678                                         logger("'myself' is ".$self." for parent ".$parent_id." checking against ".$item['author-link']." and ".$item['owner-link'], LOGGER_DEBUG);
 679                                         if ((normalise_link($item['author-link']) == $self) || (normalise_link($item['owner-link']) == $self)) {
 680                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
 681                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
 682                                         }
 683                                 }
 684                         } else {
 685                                 /*
 686                                  * Allow one to see reply tweets from status.net even when
 687                                  * we don't have or can't see the original post.
 688                                  */
 689                                 if ($force_parent) {
 690                                         logger('$force_parent=true, reply converted to top-level post.');
 691                                         $parent_id = 0;
 692                                         $item['parent-uri'] = $item['uri'];
 693                                         $item['gravity'] = 0;
 694                                 } else {
 695                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
 696                                         return 0;
 697                                 }
 698
 699                                 $parent_deleted = 0;
 700                         }
 701                 }
 702
 703                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
 704                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
 705                 if (dba::exists('item', $condition)) {
 706                         logger('duplicated item with the same uri found. '.print_r($item,true));
 707                         return 0;
 708                 }
 709
 710                 // On Friendica and Diaspora the GUID is unique
 711                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
 712                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 713                         if (dba::exists('item', $condition)) {
 714                                 logger('duplicated item with the same guid found. '.print_r($item,true));
 715                                 return 0;
 716                         }
 717                 } else {
 718                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 719                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 720                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 721                         if (dba::exists('item', $condition)) {
 722                                 logger('duplicated item with the same body found. '.print_r($item,true));
 723                                 return 0;
 724                         }
 725                 }
 726
 727                 // ACL settings
 728                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
 729                         $private = 1;
 730                 } else {
 731                         $private = $item['private'];
 732                 }
 733
 734                 $item["allow_cid"] = $allow_cid;
 735                 $item["allow_gid"] = $allow_gid;
 736                 $item["deny_cid"] = $deny_cid;
 737                 $item["deny_gid"] = $deny_gid;
 738                 $item["private"] = $private;
 739                 $item["deleted"] = $parent_deleted;
 740
 741                 // Fill the cache field
 742                 put_item_in_cache($item);
 743
 744                 if ($notify) {
 745                         Addon::callHooks('post_local', $item);
 746                 } else {
 747                         Addon::callHooks('post_remote', $item);
 748                 }
 749
 750                 // This array field is used to trigger some automatic reactions
 751                 // It is mainly used in the "post_local" hook.
 752                 unset($item['api_source']);
 753
 754                 if (x($item, 'cancel')) {
 755                         logger('post cancelled by addon.');
 756                         return 0;
 757                 }
 758
 759                 /*
 760                  * Check for already added items.
 761                  * There is a timing issue here that sometimes creates double postings.
 762                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 763                  */
 764                 if ($item["uid"] == 0) {
 765                         if (dba::exists('item', ['uri' => trim($item['uri']), 'uid' => 0])) {
 766                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
 767                                 return 0;
 768                         }
 769                 }
 770
 771                 logger('' . print_r($item,true), LOGGER_DATA);
 772
 773                 dba::transaction();
 774                 $ret = dba::insert('item', $item);
 775
 776                 // When the item was successfully stored we fetch the ID of the item.
 777                 if (DBM::is_result($ret)) {
 778                         $current_post = dba::lastInsertId();
 779                 } else {
 780                         // This can happen - for example - if there are locking timeouts.
 781                         dba::rollback();
 782
 783                         // Store the data into a spool file so that we can try again later.
 784
 785                         // At first we restore the Diaspora signature that we removed above.
 786                         if (isset($encoded_signature)) {
 787                                 $item['dsprsig'] = $encoded_signature;
 788                         }
 789
 790                         // Now we store the data in the spool directory
 791                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 792                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
 793
 794                         $spoolpath = get_spoolpath();
 795                         if ($spoolpath != "") {
 796                                 $spool = $spoolpath.'/'.$file;
 797                                 file_put_contents($spool, json_encode($item));
 798                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
 799                         }
 800                         return 0;
 801                 }
 802
 803                 if ($current_post == 0) {
 804                         // This is one of these error messages that never should occur.
 805                         logger("couldn't find created item - we better quit now.");
 806                         dba::rollback();
 807                         return 0;
 808                 }
 809
 810                 // How much entries have we created?
 811                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
 812                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
 813
 814                 if ($entries > 1) {
 815                         // There are duplicates. We delete our just created entry.
 816                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
 817
 818                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
 819                         dba::delete('item', ['id' => $current_post]);
 820                         dba::commit();
 821                         return 0;
 822                 } elseif ($entries == 0) {
 823                         // This really should never happen since we quit earlier if there were problems.
 824                         logger("Something is terribly wrong. We haven't found our created entry.");
 825                         dba::rollback();
 826                         return 0;
 827                 }
 828
 829                 logger('created item '.$current_post);
 830                 self::updateContact($item);
 831
 832                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
 833                         $parent_id = $current_post;
 834                 }
 835
 836                 // Set parent id
 837                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
 838
 839                 $item['id'] = $current_post;
 840                 $item['parent'] = $parent_id;
 841
 842                 // update the commented timestamp on the parent
 843                 // Only update "commented" if it is really a comment
 844                 if (($item['verb'] == ACTIVITY_POST) || !Config::get("system", "like_no_comment")) {
 845                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
 846                 } else {
 847                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
 848                 }
 849
 850                 if ($dsprsig) {
 851                         /*
 852                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
 853                          * We can check for this condition when we decode and encode the stuff again.
 854                          */
 855                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
 856                                 $dsprsig->signature = base64_decode($dsprsig->signature);
 857                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
 858                         }
 859
 860                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
 861                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
 862                 }
 863
 864                 if (!empty($diaspora_signed_text)) {
 865                         // Formerly we stored the signed text, the signature and the author in different fields.
 866                         // We now store the raw data so that we are more flexible.
 867                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
 868                 }
 869
 870                 $deleted = self::tagDeliver($item['uid'], $current_post);
 871
 872                 /*
 873                  * current post can be deleted if is for a community page and no mention are
 874                  * in it.
 875                  */
 876                 if (!$deleted && !$dontcache) {
 877                         $posted_item = dba::selectFirst('item', [], ['id' => $current_post]);
 878                         if (DBM::is_result($posted_item)) {
 879                                 if ($notify) {
 880                                         Addon::callHooks('post_local_end', $posted_item);
 881                                 } else {
 882                                         Addon::callHooks('post_remote_end', $posted_item);
 883                                 }
 884                         } else {
 885                                 logger('new item not found in DB, id ' . $current_post);
 886                         }
 887                 }
 888
 889                 if ($item['parent-uri'] === $item['uri']) {
 890                         self::addThread($current_post);
 891                 } else {
 892                         self::updateThread($parent_id);
 893                 }
 894
 895                 dba::commit();
 896
 897                 /*
 898                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
 899                  * This is not perfect - but a workable solution until we found the reason for the problem.
 900                  */
 901                 Term::insertFromTagFieldByItemId($current_post);
 902                 Term::insertFromFileFieldByItemId($current_post);
 903
 904                 if ($item['parent-uri'] === $item['uri']) {
 905                         self::addShadow($current_post);
 906                 } else {
 907                         self::addShadowPost($current_post);
 908                 }
 909
 910                 check_user_notification($current_post);
 911
 912                 if ($notify) {
 913                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
 914                 } elseif (!empty($parent) && $parent['origin']) {
 915                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
 916                 }
 917
 918                 return $current_post;
 919         }
 920
 921         /**
 922          * @brief Distributes public items to the receivers
 923          *
 924          * @param integer $itemid      Item ID that should be added
 925          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
 926          */
 927         public static function distribute($itemid, $signed_text = '')
 928         {
 929                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
 930                 $parent = dba::selectFirst('item', ['owner-id'], $condition);
 931                 if (!DBM::is_result($parent)) {
 932                         return;
 933                 }
 934
 935                 // Only distribute public items from native networks
 936                 $condition = ['id' => $itemid, 'uid' => 0,
 937                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
 938                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
 939                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
 940                 if (!DBM::is_result($item)) {
 941                         return;
 942                 }
 943
 944                 unset($item['id']);
 945                 unset($item['parent']);
 946                 unset($item['mention']);
 947                 unset($item['wall']);
 948                 unset($item['origin']);
 949                 unset($item['starred']);
 950                 unset($item['rendered-hash']);
 951                 unset($item['rendered-html']);
 952
 953                 $users = [];
 954
 955                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
 956                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
 957                 $contacts = dba::select('contact', ['uid'], $condition);
 958                 while ($contact = dba::fetch($contacts)) {
 959                         $users[$contact['uid']] = $contact['uid'];
 960                 }
 961
 962                 $origin_uid = 0;
 963
 964                 if ($item['uri'] != $item['parent-uri']) {
 965                         $parents = dba::select('item', ['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
 966                         while ($parent = dba::fetch($parents)) {
 967                                 $users[$parent['uid']] = $parent['uid'];
 968                                 if ($parent['origin'] && !$item['origin']) {
 969                                         $origin_uid = $parent['uid'];
 970                                 }
 971                         }
 972                 }
 973
 974                 foreach ($users as $uid) {
 975                         if ($origin_uid == $uid) {
 976                                 $item['diaspora_signed_text'] = $signed_text;
 977                         }
 978                         self::storeForUser($itemid, $item, $uid);
 979                 }
 980         }
 981
 982         /**
 983          * @brief Store public items for the receivers
 984          *
 985          * @param integer $itemid Item ID that should be added
 986          * @param array   $item   The item entry that will be stored
 987          * @param integer $uid    The user that will receive the item entry
 988          */
 989         private static function storeForUser($itemid, $item, $uid)
 990         {
 991                 $item['uid'] = $uid;
 992                 $item['origin'] = 0;
 993                 $item['wall'] = 0;
 994                 if ($item['uri'] == $item['parent-uri']) {
 995                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
 996                 } else {
 997                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
 998                 }
 999
1000                 if (empty($item['contact-id'])) {
1001                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1002                         if (!DBM::is_result($self)) {
1003                                 return;
1004                         }
1005                         $item['contact-id'] = $self['id'];
1006                 }
1007
1008                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1009                         $item['type'] = 'remote-comment';
1010                 } elseif ($item['type'] == 'wall') {
1011                         $item['type'] = 'remote';
1012                 }
1013
1014                 /// @todo Handling of "event-id"
1015
1016                 $notify = false;
1017                 if ($item['uri'] == $item['parent-uri']) {
1018                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1019                         if (DBM::is_result($contact)) {
1020                                 $notify = self::isRemoteSelf($contact, $item);
1021                         }
1022                 }
1023
1024                 $distributed = self::insert($item, false, $notify, true);
1025
1026                 if (!$distributed) {
1027                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1028                 } else {
1029                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1030                 }
1031         }
1032
1033         /**
1034          * @brief Add a shadow entry for a given item id that is a thread starter
1035          *
1036          * We store every public item entry additionally with the user id "0".
1037          * This is used for the community page and for the search.
1038          * It is planned that in the future we will store public item entries only once.
1039          *
1040          * @param integer $itemid Item ID that should be added
1041          */
1042         public static function addShadow($itemid)
1043         {
1044                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network'];
1045                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1046                 $item = dba::selectFirst('item', $fields, $condition);
1047
1048                 if (!DBM::is_result($item)) {
1049                         return;
1050                 }
1051
1052                 // is it already a copy?
1053                 if (($itemid == 0) || ($item['uid'] == 0)) {
1054                         return;
1055                 }
1056
1057                 // Is it a visible public post?
1058                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1059                         return;
1060                 }
1061
1062                 // is it an entry from a connector? Only add an entry for natively connected networks
1063                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1064                         return;
1065                 }
1066
1067                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1068
1069                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
1070                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
1071
1072                         if (!dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1073                                 // Preparing public shadow (removing user specific data)
1074                                 $item['uid'] = 0;
1075                                 unset($item['id']);
1076                                 unset($item['parent']);
1077                                 unset($item['wall']);
1078                                 unset($item['mention']);
1079                                 unset($item['origin']);
1080                                 unset($item['starred']);
1081                                 unset($item['rendered-hash']);
1082                                 unset($item['rendered-html']);
1083                                 if ($item['uri'] == $item['parent-uri']) {
1084                                         $item['contact-id'] = Contact::getIdForURL($item['owner-link']);
1085                                 } else {
1086                                         $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1087                                 }
1088
1089                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1090                                         $item['type'] = 'remote-comment';
1091                                 } elseif ($item['type'] == 'wall') {
1092                                         $item['type'] = 'remote';
1093                                 }
1094
1095                                 $public_shadow = self::insert($item, false, false, true);
1096
1097                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1098                         }
1099                 }
1100         }
1101
1102         /**
1103          * @brief Add a shadow entry for a given item id that is a comment
1104          *
1105          * This function does the same like the function above - but for comments
1106          *
1107          * @param integer $itemid Item ID that should be added
1108          */
1109         public static function addShadowPost($itemid)
1110         {
1111                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1112                 if (!DBM::is_result($item)) {
1113                         return;
1114                 }
1115
1116                 // Is it a toplevel post?
1117                 if ($item['id'] == $item['parent']) {
1118                         self::addShadow($itemid);
1119                         return;
1120                 }
1121
1122                 // Is this a shadow entry?
1123                 if ($item['uid'] == 0) {
1124                         return;
1125                 }
1126
1127                 // Is there a shadow parent?
1128                 if (!dba::exists('item', ['uri' => $item['parent-uri'], 'uid' => 0])) {
1129                         return;
1130                 }
1131
1132                 // Is there already a shadow entry?
1133                 if (dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1134                         return;
1135                 }
1136
1137                 // Save "origin" and "parent" state
1138                 $origin = $item['origin'];
1139                 $parent = $item['parent'];
1140
1141                 // Preparing public shadow (removing user specific data)
1142                 $item['uid'] = 0;
1143                 unset($item['id']);
1144                 unset($item['parent']);
1145                 unset($item['wall']);
1146                 unset($item['mention']);
1147                 unset($item['origin']);
1148                 unset($item['starred']);
1149                 unset($item['rendered-hash']);
1150                 unset($item['rendered-html']);
1151                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1152
1153                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1154                         $item['type'] = 'remote-comment';
1155                 } elseif ($item['type'] == 'wall') {
1156                         $item['type'] = 'remote';
1157                 }
1158
1159                 $public_shadow = self::insert($item, false, false, true);
1160
1161                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1162
1163                 // If this was a comment to a Diaspora post we don't get our comment back.
1164                 // This means that we have to distribute the comment by ourselves.
1165                 if ($origin && dba::exists('item', ['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1166                         self::distribute($public_shadow);
1167                 }
1168         }
1169
1170          /**
1171          * Adds a "lang" specification in a "postopts" element of given $arr,
1172          * if possible and not already present.
1173          * Expects "body" element to exist in $arr.
1174          */
1175         private static function addLanguageInPostopts(&$item)
1176         {
1177                 $postopts = "";
1178
1179                 if (!empty($item['postopts'])) {
1180                         if (strstr($item['postopts'], 'lang=')) {
1181                                 // do not override
1182                                 return;
1183                         }
1184                         $postopts = $item['postopts'];
1185                 }
1186
1187                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1188
1189                 $languages = (new Text_LanguageDetect())->detect($naked_body, 3);
1190
1191                 if (sizeof($languages) > 0) {
1192                         if ($postopts != '') {
1193                                 $postopts .= '&'; // arbitrary separator, to be reviewed
1194                         }
1195
1196                         $postopts .= 'lang=';
1197                         $sep = "";
1198
1199                         foreach ($languages as $language => $score) {
1200                                 $postopts .= $sep . $language . ";" . $score;
1201                                 $sep = ':';
1202                         }
1203                         $item['postopts'] = $postopts;
1204                 }
1205         }
1206
1207         /**
1208          * @brief Creates an unique guid out of a given uri
1209          *
1210          * @param string $uri uri of an item entry
1211          * @param string $host hostname for the GUID prefix
1212          * @return string unique guid
1213          */
1214         public static function guidFromUri($uri, $host)
1215         {
1216                 // Our regular guid routine is using this kind of prefix as well
1217                 // We have to avoid that different routines could accidentally create the same value
1218                 $parsed = parse_url($uri);
1219
1220                 // We use a hash of the hostname as prefix for the guid
1221                 $guid_prefix = hash("crc32", $host);
1222
1223                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1224                 unset($parsed["scheme"]);
1225
1226                 // Glue it together to be able to make a hash from it
1227                 $host_id = implode("/", $parsed);
1228
1229                 // We could use any hash algorithm since it isn't a security issue
1230                 $host_hash = hash("ripemd128", $host_id);
1231
1232                 return $guid_prefix.$host_hash;
1233         }
1234
1235         /**
1236          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1237          *
1238          * This can be used to filter for inactive contacts.
1239          * Only do this for public postings to avoid privacy problems, since poco data is public.
1240          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1241          *
1242          * @param array $arr Contains the just posted item record
1243          */
1244         private static function updateContact($arr)
1245         {
1246                 // Unarchive the author
1247                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1248                 if (DBM::is_result($contact)) {
1249                         Contact::unmarkForArchival($contact);
1250                 }
1251
1252                 // Unarchive the contact if it's not our own contact
1253                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1254                 if (DBM::is_result($contact)) {
1255                         Contact::unmarkForArchival($contact);
1256                 }
1257
1258                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1259
1260                 // Is it a forum? Then we don't care about the rules from above
1261                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1262                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1263                                 $update = true;
1264                         }
1265                 }
1266
1267                 if ($update) {
1268                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1269                                 ['id' => $arr['contact-id']]);
1270                 }
1271                 // Now do the same for the system wide contacts with uid=0
1272                 if (!$arr['private']) {
1273                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1274                                 ['id' => $arr['owner-id']]);
1275
1276                         if ($arr['owner-id'] != $arr['author-id']) {
1277                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1278                                         ['id' => $arr['author-id']]);
1279                         }
1280                 }
1281         }
1282
1283         public static function setHashtags(&$item)
1284         {
1285
1286                 $tags = get_tags($item["body"]);
1287
1288                 // No hashtags?
1289                 if (!count($tags)) {
1290                         return false;
1291                 }
1292
1293                 // This sorting is important when there are hashtags that are part of other hashtags
1294                 // Otherwise there could be problems with hashtags like #test and #test2
1295                 rsort($tags);
1296
1297                 $URLSearchString = "^\[\]";
1298
1299                 // All hashtags should point to the home server if "local_tags" is activated
1300                 if (Config::get('system', 'local_tags')) {
1301                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1302                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
1303
1304                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1305                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
1306                 }
1307
1308                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1309                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1310                         function ($match) {
1311                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1312                         }, $item["body"]);
1313
1314                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1315                         function ($match) {
1316                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1317                         }, $item["body"]);
1318
1319                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1320                         function ($match) {
1321                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1322                         }, $item["body"]);
1323
1324                 // Repair recursive urls
1325                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1326                                 "&num;$2", $item["body"]);
1327
1328                 foreach ($tags as $tag) {
1329                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
1330                                 continue;
1331                         }
1332
1333                         $basetag = str_replace('_',' ',substr($tag,1));
1334
1335                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1336
1337                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
1338
1339                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
1340                                 if (strlen($item["tag"])) {
1341                                         $item["tag"] = ','.$item["tag"];
1342                                 }
1343                                 $item["tag"] = $newtag.$item["tag"];
1344                         }
1345                 }
1346
1347                 // Convert back the masked hashtags
1348                 $item["body"] = str_replace("&num;", "#", $item["body"]);
1349         }
1350
1351         public static function getGuidById($id)
1352         {
1353                 $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
1354                 if (DBM::is_result($item)) {
1355                         return $item['guid'];
1356                 } else {
1357                         return '';
1358                 }
1359         }
1360
1361         public static function getIdAndNickByGuid($guid, $uid = 0)
1362         {
1363                 $nick = "";
1364                 $id = 0;
1365
1366                 if ($uid == 0) {
1367                         $uid == local_user();
1368                 }
1369
1370                 // Does the given user have this item?
1371                 if ($uid) {
1372                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1373                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1374                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1375                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
1376                         if (DBM::is_result($item)) {
1377                                 $id = $item["id"];
1378                                 $nick = $item["nickname"];
1379                         }
1380                 }
1381
1382                 // Or is it anywhere on the server?
1383                 if ($nick == "") {
1384                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1385                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1386                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1387                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
1388                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
1389                                         AND NOT `item`.`private` AND `item`.`wall`
1390                                         AND `item`.`guid` = ?", $guid);
1391                         if (DBM::is_result($item)) {
1392                                 $id = $item["id"];
1393                                 $nick = $item["nickname"];
1394                         }
1395                 }
1396                 return ["nick" => $nick, "id" => $id];
1397         }
1398
1399         /**
1400          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1401          * @param int $uid
1402          * @param int $item_id
1403          * @return bool true if item was deleted, else false
1404          */
1405         private static function tagDeliver($uid, $item_id)
1406         {
1407                 $mention = false;
1408
1409                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
1410                 if (!DBM::is_result($user)) {
1411                         return;
1412                 }
1413
1414                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
1415                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
1416
1417                 $item = dba::selectFirst('item', [], ['id' => $item_id]);
1418                 if (!DBM::is_result($item)) {
1419                         return;
1420                 }
1421
1422                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1423
1424                 /*
1425                  * Diaspora uses their own hardwired link URL in @-tags
1426                  * instead of the one we supply with webfinger
1427                  */
1428                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
1429
1430                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1431                 if ($cnt) {
1432                         foreach ($matches as $mtch) {
1433                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
1434                                         $mention = true;
1435                                         logger('mention found: ' . $mtch[2]);
1436                                 }
1437                         }
1438                 }
1439
1440                 if (!$mention) {
1441                         if (($community_page || $prvgroup) &&
1442                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
1443                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
1444                                 // delete it!
1445                                 logger("no-mention top-level post to community or private group. delete.");
1446                                 dba::delete('item', ['id' => $item_id]);
1447                                 return true;
1448                         }
1449                         return;
1450                 }
1451
1452                 $arr = ['item' => $item, 'user' => $user];
1453
1454                 Addon::callHooks('tagged', $arr);
1455
1456                 if (!$community_page && !$prvgroup) {
1457                         return;
1458                 }
1459
1460                 /*
1461                  * tgroup delivery - setup a second delivery chain
1462                  * prevent delivery looping - only proceed
1463                  * if the message originated elsewhere and is a top-level post
1464                  */
1465                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1466                         return;
1467                 }
1468
1469                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1470                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1471                 if (!DBM::is_result($self)) {
1472                         return;
1473                 }
1474
1475                 $owner_id = Contact::getIdForURL($self['url']);
1476
1477                 // also reset all the privacy bits to the forum default permissions
1478
1479                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
1480
1481                 $forum_mode = ($prvgroup ? 2 : 1);
1482
1483                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1484                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
1485                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
1486                 dba::update('item', $fields, ['id' => $item_id]);
1487
1488                 self::updateThread($item_id);
1489
1490                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
1491         }
1492
1493         public static function isRemoteSelf($contact, &$datarray)
1494         {
1495                 $a = get_app();
1496
1497                 if (!$contact['remote_self']) {
1498                         return false;
1499                 }
1500
1501                 // Prevent the forwarding of posts that are forwarded
1502                 if ($datarray["extid"] == NETWORK_DFRN) {
1503                         logger('Already forwarded', LOGGER_DEBUG);
1504                         return false;
1505                 }
1506
1507                 // Prevent to forward already forwarded posts
1508                 if ($datarray["app"] == $a->get_hostname()) {
1509                         logger('Already forwarded (second test)', LOGGER_DEBUG);
1510                         return false;
1511                 }
1512
1513                 // Only forward posts
1514                 if ($datarray["verb"] != ACTIVITY_POST) {
1515                         logger('No post', LOGGER_DEBUG);
1516                         return false;
1517                 }
1518
1519                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
1520                         logger('Not public', LOGGER_DEBUG);
1521                         return false;
1522                 }
1523
1524                 $datarray2 = $datarray;
1525                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
1526                 if ($contact['remote_self'] == 2) {
1527                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
1528                                         ['uid' => $contact['uid'], 'self' => true]);
1529                         if (DBM::is_result($self)) {
1530                                 $datarray['contact-id'] = $self["id"];
1531
1532                                 $datarray['owner-name'] = $self["name"];
1533                                 $datarray['owner-link'] = $self["url"];
1534                                 $datarray['owner-avatar'] = $self["thumb"];
1535
1536                                 $datarray['author-name']   = $datarray['owner-name'];
1537                                 $datarray['author-link']   = $datarray['owner-link'];
1538                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
1539
1540                                 unset($datarray['created']);
1541                                 unset($datarray['edited']);
1542
1543                                 unset($datarray['network']);
1544                                 unset($datarray['owner-id']);
1545                                 unset($datarray['author-id']);
1546                         }
1547
1548                         if ($contact['network'] != NETWORK_FEED) {
1549                                 $datarray["guid"] = get_guid(32);
1550                                 unset($datarray["plink"]);
1551                                 $datarray["uri"] = item_new_uri($a->get_hostname(), $contact['uid'], $datarray["guid"]);
1552                                 $datarray["parent-uri"] = $datarray["uri"];
1553                                 $datarray["thr-parent"] = $datarray["uri"];
1554                                 $datarray["extid"] = NETWORK_DFRN;
1555                                 $urlpart = parse_url($datarray2['author-link']);
1556                                 $datarray["app"] = $urlpart["host"];
1557                         } else {
1558                                 $datarray['private'] = 0;
1559                         }
1560                 }
1561
1562                 if ($contact['network'] != NETWORK_FEED) {
1563                         // Store the original post
1564                         $result = self::insert($datarray2, false, false);
1565                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
1566                 } else {
1567                         $datarray["app"] = "Feed";
1568                         $result = true;
1569                 }
1570
1571                 // Trigger automatic reactions for addons
1572                 $datarray['api_source'] = true;
1573
1574                 // We have to tell the hooks who we are - this really should be improved
1575                 $_SESSION["authenticated"] = true;
1576                 $_SESSION["uid"] = $contact['uid'];
1577
1578                 return $result;
1579         }
1580
1581         /**
1582          *
1583          * @param string $s
1584          * @param int    $uid
1585          * @param array  $item
1586          * @param int    $cid
1587          * @return string
1588          */
1589         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
1590         {
1591                 if (Config::get('system', 'disable_embedded')) {
1592                         return $s;
1593                 }
1594
1595                 logger('check for photos', LOGGER_DEBUG);
1596                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
1597
1598                 $orig_body = $s;
1599                 $new_body = '';
1600
1601                 $img_start = strpos($orig_body, '[img');
1602                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1603                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1604
1605                 while (($img_st_close !== false) && ($img_len !== false)) {
1606                         $img_st_close++; // make it point to AFTER the closing bracket
1607                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
1608
1609                         logger('found photo ' . $image, LOGGER_DEBUG);
1610
1611                         if (stristr($image, $site . '/photo/')) {
1612                                 // Only embed locally hosted photos
1613                                 $replace = false;
1614                                 $i = basename($image);
1615                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
1616                                 $x = strpos($i, '-');
1617
1618                                 if ($x) {
1619                                         $res = substr($i, $x + 1);
1620                                         $i = substr($i, 0, $x);
1621                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
1622                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
1623                                         if (DBM::is_result($photo)) {
1624                                                 /*
1625                                                  * Check to see if we should replace this photo link with an embedded image
1626                                                  * 1. No need to do so if the photo is public
1627                                                  * 2. If there's a contact-id provided, see if they're in the access list
1628                                                  *    for the photo. If so, embed it.
1629                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
1630                                                  *    permissions, regardless of order but first check to see if they're an exact
1631                                                  *    match to save some processing overhead.
1632                                                  */
1633                                                 if (self::hasPermissions($photo)) {
1634                                                         if ($cid) {
1635                                                                 $recips = self::enumeratePermissions($photo);
1636                                                                 if (in_array($cid, $recips)) {
1637                                                                         $replace = true;
1638                                                                 }
1639                                                         } elseif ($item) {
1640                                                                 if (self::samePermissions($item, $photo)) {
1641                                                                         $replace = true;
1642                                                                 }
1643                                                         }
1644                                                 }
1645                                                 if ($replace) {
1646                                                         $data = $photo['data'];
1647                                                         $type = $photo['type'];
1648
1649                                                         // If a custom width and height were specified, apply before embedding
1650                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
1651                                                                 logger('scaling photo', LOGGER_DEBUG);
1652
1653                                                                 $width = intval($match[1]);
1654                                                                 $height = intval($match[2]);
1655
1656                                                                 $Image = new Image($data, $type);
1657                                                                 if ($Image->isValid()) {
1658                                                                         $Image->scaleDown(max($width, $height));
1659                                                                         $data = $Image->asString();
1660                                                                         $type = $Image->getType();
1661                                                                 }
1662                                                         }
1663
1664                                                         logger('replacing photo', LOGGER_DEBUG);
1665                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
1666                                                         logger('replaced: ' . $image, LOGGER_DATA);
1667                                                 }
1668                                         }
1669                                 }
1670                         }
1671
1672                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
1673                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
1674                         if ($orig_body === false) {
1675                                 $orig_body = '';
1676                         }
1677
1678                         $img_start = strpos($orig_body, '[img');
1679                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1680                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1681                 }
1682
1683                 $new_body = $new_body . $orig_body;
1684
1685                 return $new_body;
1686         }
1687
1688         private static function hasPermissions($obj)
1689         {
1690                 return (
1691                         (
1692                                 x($obj, 'allow_cid')
1693                         ) || (
1694                                 x($obj, 'allow_gid')
1695                         ) || (
1696                                 x($obj, 'deny_cid')
1697                         ) || (
1698                                 x($obj, 'deny_gid')
1699                         )
1700                 );
1701         }
1702
1703         private static function samePermissions($obj1, $obj2)
1704         {
1705                 // first part is easy. Check that these are exactly the same.
1706                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
1707                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
1708                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
1709                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
1710                         return true;
1711                 }
1712
1713                 // This is harder. Parse all the permissions and compare the resulting set.
1714                 $recipients1 = self::enumeratePermissions($obj1);
1715                 $recipients2 = self::enumeratePermissions($obj2);
1716                 sort($recipients1);
1717                 sort($recipients2);
1718
1719                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
1720                 return ($recipients1 == $recipients2);
1721         }
1722
1723         // returns an array of contact-ids that are allowed to see this object
1724         private static function enumeratePermissions($obj)
1725         {
1726                 $allow_people = expand_acl($obj['allow_cid']);
1727                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
1728                 $deny_people  = expand_acl($obj['deny_cid']);
1729                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
1730                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
1731                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
1732                 $recipients   = array_diff($recipients, $deny);
1733                 return $recipients;
1734         }
1735
1736         public static function getFeedTags($item)
1737         {
1738                 $ret = [];
1739                 $matches = false;
1740                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
1741                 if ($cnt) {
1742                         for ($x = 0; $x < $cnt; $x ++) {
1743                                 if ($matches[1][$x]) {
1744                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
1745                                 }
1746                         }
1747                 }
1748                 $matches = false;
1749                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
1750                 if ($cnt) {
1751                         for ($x = 0; $x < $cnt; $x ++) {
1752                                 if ($matches[1][$x]) {
1753                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
1754                                 }
1755                         }
1756                 }
1757                 return $ret;
1758         }
1759
1760         public static function expire($uid, $days, $network = "", $force = false)
1761         {
1762                 if (!$uid || ($days < 1)) {
1763                         return;
1764                 }
1765
1766                 /*
1767                  * $expire_network_only = save your own wall posts
1768                  * and just expire conversations started by others
1769                  */
1770                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
1771                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
1772
1773                 if ($network != "") {
1774                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
1775
1776                         /*
1777                          * There is an index "uid_network_received" but not "uid_network_created"
1778                          * This avoids the creation of another index just for one purpose.
1779                          * And it doesn't really matter wether to look at "received" or "created"
1780                          */
1781                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
1782                 } else {
1783                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
1784                 }
1785
1786                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
1787                         WHERE `uid` = %d $range
1788                         AND `id` = `parent`
1789                         $sql_extra
1790                         AND `deleted` = 0",
1791                         intval($uid),
1792                         intval($days)
1793                 );
1794
1795                 if (!DBM::is_result($r)) {
1796                         return;
1797                 }
1798
1799                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
1800
1801                 // Forcing expiring of items - but not notes and marked items
1802                 if ($force) {
1803                         $expire_items = true;
1804                 }
1805
1806                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
1807                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
1808                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
1809
1810                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
1811
1812                 foreach ($r as $item) {
1813
1814                         // don't expire filed items
1815
1816                         if (strpos($item['file'],'[') !== false) {
1817                                 continue;
1818                         }
1819
1820                         // Only expire posts, not photos and photo comments
1821
1822                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
1823                                 continue;
1824                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
1825                                 continue;
1826                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
1827                                 continue;
1828                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
1829                                 continue;
1830                         }
1831
1832                         self::deleteById($item['id'], PRIORITY_LOW);
1833                 }
1834         }
1835
1836         public static function firstPostDate($uid, $wall = false)
1837         {
1838                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
1839                 $params = ['order' => ['created' => false]];
1840                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
1841                 if (DBM::is_result($thread)) {
1842                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
1843                 }
1844                 return false;
1845         }
1846
1847         /**
1848          * @brief add/remove activity to an item
1849          *
1850          * Toggle activities as like,dislike,attend of an item
1851          *
1852          * @param string $item_id
1853          * @param string $verb
1854          *              Activity verb. One of
1855          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
1856          *                      attendno, unattendno, attendmaybe, unattendmaybe
1857          * @hook 'post_local_end'
1858          *              array $arr
1859          *                      'post_id' => ID of posted item
1860          */
1861         public static function performLike($item_id, $verb)
1862         {
1863                 if (!local_user() && !remote_user()) {
1864                         return false;
1865                 }
1866
1867                 switch ($verb) {
1868                         case 'like':
1869                         case 'unlike':
1870                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
1871                                 $activity = ACTIVITY_LIKE;
1872                                 break;
1873                         case 'dislike':
1874                         case 'undislike':
1875                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
1876                                 $activity = ACTIVITY_DISLIKE;
1877                                 break;
1878                         case 'attendyes':
1879                         case 'unattendyes':
1880                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
1881                                 $activity = ACTIVITY_ATTEND;
1882                                 break;
1883                         case 'attendno':
1884                         case 'unattendno':
1885                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
1886                                 $activity = ACTIVITY_ATTENDNO;
1887                                 break;
1888                         case 'attendmaybe':
1889                         case 'unattendmaybe':
1890                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
1891                                 $activity = ACTIVITY_ATTENDMAYBE;
1892                                 break;
1893                         default:
1894                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
1895                                 return false;
1896                 }
1897
1898                 // Enable activity toggling instead of on/off
1899                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
1900
1901                 logger('like: verb ' . $verb . ' item ' . $item_id);
1902
1903                 $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
1904                 if (!DBM::is_result($item)) {
1905                         logger('like: unknown item ' . $item_id);
1906                         return false;
1907                 }
1908
1909                 $uid = $item['uid'];
1910                 if (($uid == 0) && local_user()) {
1911                         $uid = local_user();
1912                 }
1913
1914                 if (!can_write_wall($uid)) {
1915                         logger('like: unable to write on wall ' . $uid);
1916                         return false;
1917                 }
1918
1919                 // Retrieves the local post owner
1920                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
1921                 if (!DBM::is_result($owner_self_contact)) {
1922                         logger('like: unknown owner ' . $uid);
1923                         return false;
1924                 }
1925
1926                 // Retrieve the current logged in user's public contact
1927                 $author_id = public_contact();
1928
1929                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
1930                 if (!DBM::is_result($author_contact)) {
1931                         logger('like: unknown author ' . $author_id);
1932                         return false;
1933                 }
1934
1935                 // Contact-id is the uid-dependant author contact
1936                 if (local_user() == $uid) {
1937                         $item_contact_id = $owner_self_contact['id'];
1938                         $item_contact = $owner_self_contact;
1939                 } else {
1940                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
1941                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
1942                         if (!DBM::is_result($item_contact)) {
1943                                 logger('like: unknown item contact ' . $item_contact_id);
1944                                 return false;
1945                         }
1946                 }
1947
1948                 // Look for an existing verb row
1949                 // event participation are essentially radio toggles. If you make a subsequent choice,
1950                 // we need to eradicate your first choice.
1951                 if ($event_verb_flag) {
1952                         $verbs = "'" . dbesc(ACTIVITY_ATTEND) . "', '" . dbesc(ACTIVITY_ATTENDNO) . "', '" . dbesc(ACTIVITY_ATTENDMAYBE) . "'";
1953                 } else {
1954                         $verbs = "'".dbesc($activity)."'";
1955                 }
1956
1957                 /// @todo This query is expected to be a performance eater due to the "OR" - it has to be changed totally
1958                 $existing_like = q("SELECT `id`, `guid`, `verb` FROM `item`
1959                         WHERE `verb` IN ($verbs)
1960                         AND `deleted` = 0
1961                         AND `author-id` = %d
1962                         AND `uid` = %d
1963                         AND (`parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s')
1964                         LIMIT 1",
1965                         intval($author_contact['id']),
1966                         intval($item['uid']),
1967                         dbesc($item_id), dbesc($item_id), dbesc($item['uri'])
1968                 );
1969
1970                 // If it exists, mark it as deleted
1971                 if (DBM::is_result($existing_like)) {
1972                         $like_item = $existing_like[0];
1973
1974                         // Already voted, undo it
1975                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
1976                         dba::update('item', $fields, ['id' => $like_item['id']]);
1977
1978                         // Clean up the Diaspora signatures for this like
1979                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
1980                         // if it had been enabled in the past
1981                         dba::delete('sign', ['iid' => $like_item['id']]);
1982
1983                         $like_item_id = $like_item['id'];
1984                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
1985
1986                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
1987                                 return true;
1988                         }
1989                 }
1990
1991                 // Verb is "un-something", just trying to delete existing entries
1992                 if (strpos($verb, 'un') === 0) {
1993                         return true;
1994                 }
1995
1996                 // Else or if event verb different from existing row, create a new item row
1997                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
1998                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
1999                         $post_type = L10n::t('event');
2000                 }
2001                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2002                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2003                 $body = $item['body'];
2004
2005                 $obj = <<< EOT
2006
2007                 <object>
2008                         <type>$objtype</type>
2009                         <local>1</local>
2010                         <id>{$item['uri']}</id>
2011                         <link>$link</link>
2012                         <title></title>
2013                         <content>$body</content>
2014                 </object>
2015 EOT;
2016
2017                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2018                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2019                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2020
2021                 $new_item = [
2022                         'guid'          => get_guid(32),
2023                         'uri'           => item_new_uri(self::getApp()->get_hostname(), $item['uid']),
2024                         'uid'           => $item['uid'],
2025                         'contact-id'    => $item_contact_id,
2026                         'type'          => 'activity',
2027                         'wall'          => $item['wall'],
2028                         'origin'        => 1,
2029                         'gravity'       => GRAVITY_LIKE,
2030                         'parent'        => $item['id'],
2031                         'parent-uri'    => $item['uri'],
2032                         'thr-parent'    => $item['uri'],
2033                         'owner-id'      => $item['owner-id'],
2034                         'owner-name'    => $item['owner-name'],
2035                         'owner-link'    => $item['owner-link'],
2036                         'owner-avatar'  => $item['owner-avatar'],
2037                         'author-id'     => $author_contact['id'],
2038                         'author-name'   => $author_contact['name'],
2039                         'author-link'   => $author_contact['url'],
2040                         'author-avatar' => $author_contact['thumb'],
2041                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2042                         'verb'          => $activity,
2043                         'object-type'   => $objtype,
2044                         'object'        => $obj,
2045                         'allow_cid'     => $item['allow_cid'],
2046                         'allow_gid'     => $item['allow_gid'],
2047                         'deny_cid'      => $item['deny_cid'],
2048                         'deny_gid'      => $item['deny_gid'],
2049                         'visible'       => 1,
2050                         'unseen'        => 1,
2051                 ];
2052
2053                 $new_item_id = self::insert($new_item);
2054
2055                 // If the parent item isn't visible then set it to visible
2056                 if (!$item['visible']) {
2057                         self::update(['visible' => true], ['id' => $item['id']]);
2058                 }
2059
2060                 // Save the author information for the like in case we need to relay to Diaspora
2061                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2062
2063                 $new_item['id'] = $new_item_id;
2064
2065                 Addon::callHooks('post_local_end', $new_item);
2066
2067                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2068
2069                 return true;
2070         }
2071
2072         private static function addThread($itemid, $onlyshadow = false)
2073         {
2074                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2075                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2076                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2077                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2078                 $item = dba::selectFirst('item', $fields, $condition);
2079
2080                 if (!DBM::is_result($item)) {
2081                         return;
2082                 }
2083
2084                 $item['iid'] = $itemid;
2085
2086                 if (!$onlyshadow) {
2087                         $result = dba::insert('thread', $item);
2088
2089                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2090                 }
2091         }
2092
2093         private static function updateThread($itemid, $setmention = false)
2094         {
2095                 $fields = ['uid', 'guid', 'title', 'body', 'created', 'edited', 'commented', 'received', 'changed',
2096                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2097                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id', 'rendered-html', 'rendered-hash'];
2098                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2099
2100                 $item = dba::selectFirst('item', $fields, $condition);
2101                 if (!DBM::is_result($item)) {
2102                         return;
2103                 }
2104
2105                 if ($setmention) {
2106                         $item["mention"] = 1;
2107                 }
2108
2109                 $sql = "";
2110
2111                 $fields = [];
2112
2113                 foreach ($item as $field => $data) {
2114                         if (!in_array($field, ["guid", "title", "body", "rendered-html", "rendered-hash"])) {
2115                                 $fields[$field] = $data;
2116                         }
2117                 }
2118
2119                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2120
2121                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2122
2123                 // Updating a shadow item entry
2124                 $items = dba::selectFirst('item', ['id'], ['guid' => $item['guid'], 'uid' => 0]);
2125
2126                 if (!DBM::is_result($items)) {
2127                         return;
2128                 }
2129
2130                 $fields = ['title' => $item['title'], 'body' => $item['body'],
2131                         'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2132                 $result = dba::update('item', $fields, ['id' => $items['id']]);
2133
2134                 logger("Updating public shadow for post ".$items["id"]." - guid ".$item["guid"]." Result: ".print_r($result, true), LOGGER_DEBUG);
2135         }
2136
2137         private static function deleteThread($itemid, $itemuri = "")
2138         {
2139                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2140                 if (!DBM::is_result($item)) {
2141                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2142                         return;
2143                 }
2144
2145                 // Using dba::delete at this time could delete the associated item entries
2146                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2147
2148                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2149
2150                 if ($itemuri != "") {
2151                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2152                         if (!dba::exists('item', $condition)) {
2153                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2154                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2155                         }
2156                 }
2157         }
2158 }