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