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 Add a shadow entry for a given item id that is a thread starter
 844          *
 845          * We store every public item entry additionally with the user id "0".
 846          * This is used for the community page and for the search.
 847          * It is planned that in the future we will store public item entries only once.
 848          *
 849          * @param integer $itemid Item ID that should be added
 850          */
 851         public static function addShadow($itemid)
 852         {
 853                 $fields = ['uid', 'wall', 'private', 'moderated', 'visible', 'contact-id', 'deleted', 'network', 'author-id', 'owner-id'];
 854                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
 855                 $item = dba::selectFirst('item', $fields, $condition);
 856
 857                 if (!DBM::is_result($item)) {
 858                         return;
 859                 }
 860
 861                 // is it already a copy?
 862                 if (($itemid == 0) || ($item['uid'] == 0)) {
 863                         return;
 864                 }
 865
 866                 // Is it a visible public post?
 867                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
 868                         return;
 869                 }
 870
 871                 // is it an entry from a connector? Only add an entry for natively connected networks
 872                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
 873                         return;
 874                 }
 875
 876                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
 877
 878                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
 879                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
 880
 881                         if (!dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
 882                                 // Preparing public shadow (removing user specific data)
 883                                 unset($item['id']);
 884                                 $item['uid'] = 0;
 885                                 $item['origin'] = 0;
 886                                 $item['wall'] = 0;
 887                                 if ($item['uri'] == $item['parent-uri']) {
 888                                         $item['contact-id'] = Contact::getIdForURL($item['owner-link']);
 889                                 } else {
 890                                         $item['contact-id'] = Contact::getIdForURL($item['author-link']);
 891                                 }
 892
 893                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
 894                                         $item['type'] = 'remote-comment';
 895                                 } elseif ($item['type'] == 'wall') {
 896                                         $item['type'] = 'remote';
 897                                 }
 898
 899                                 $public_shadow = self::insert($item, false, false, true);
 900
 901                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
 902                         }
 903                 }
 904         }
 905
 906         /**
 907          * @brief Add a shadow entry for a given item id that is a comment
 908          *
 909          * This function does the same like the function above - but for comments
 910          *
 911          * @param integer $itemid Item ID that should be added
 912          */
 913         public static function addShadowPost($itemid)
 914         {
 915                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
 916                 if (!DBM::is_result($item)) {
 917                         return;
 918                 }
 919
 920                 // Is it a toplevel post?
 921                 if ($item['id'] == $item['parent']) {
 922                         self::addShadow($itemid);
 923                         return;
 924                 }
 925
 926                 // Is this a shadow entry?
 927                 if ($item['uid'] == 0)
 928                         return;
 929
 930                 // Is there a shadow parent?
 931                 if (!dba::exists('item', ['uri' => $item['parent-uri'], 'uid' => 0])) {
 932                         return;
 933                 }
 934
 935                 // Is there already a shadow entry?
 936                 if (dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
 937                         return;
 938                 }
 939
 940                 // Preparing public shadow (removing user specific data)
 941                 unset($item['id']);
 942                 $item['uid'] = 0;
 943                 $item['origin'] = 0;
 944                 $item['wall'] = 0;
 945                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
 946
 947                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
 948                         $item['type'] = 'remote-comment';
 949                 } elseif ($item['type'] == 'wall') {
 950                         $item['type'] = 'remote';
 951                 }
 952
 953                 $public_shadow = self::insert($item, false, false, true);
 954
 955                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
 956         }
 957
 958          /**
 959          * Adds a "lang" specification in a "postopts" element of given $arr,
 960          * if possible and not already present.
 961          * Expects "body" element to exist in $arr.
 962          */
 963         private static function addLanguageInPostopts(&$item)
 964         {
 965                 if (!empty($item['postopts'])) {
 966                         if (strstr($item['postopts'], 'lang=')) {
 967                                 // do not override
 968                                 return;
 969                         }
 970                         $postopts = $item['postopts'];
 971                 } else {
 972                         $postopts = "";
 973                 }
 974
 975                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
 976
 977                 $languages = (new Text_LanguageDetect())->detect($naked_body, 3);
 978
 979                 if (sizeof($languages) > 0) {
 980                         if ($postopts != '') {
 981                                 $postopts .= '&'; // arbitrary separator, to be reviewed
 982                         }
 983
 984                         $postopts .= 'lang=';
 985                         $sep = "";
 986
 987                         foreach ($languages as $language => $score) {
 988                                 $postopts .= $sep . $language . ";" . $score;
 989                                 $sep = ':';
 990                         }
 991                         $item['postopts'] = $postopts;
 992                 }
 993         }
 994
 995         /**
 996          * @brief Creates an unique guid out of a given uri
 997          *
 998          * @param string $uri uri of an item entry
 999          * @param string $host hostname for the GUID prefix
1000          * @return string unique guid
1001          */
1002         public static function guidFromUri($uri, $host)
1003         {
1004                 // Our regular guid routine is using this kind of prefix as well
1005                 // We have to avoid that different routines could accidentally create the same value
1006                 $parsed = parse_url($uri);
1007
1008                 // We use a hash of the hostname as prefix for the guid
1009                 $guid_prefix = hash("crc32", $host);
1010
1011                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1012                 unset($parsed["scheme"]);
1013
1014                 // Glue it together to be able to make a hash from it
1015                 $host_id = implode("/", $parsed);
1016
1017                 // We could use any hash algorithm since it isn't a security issue
1018                 $host_hash = hash("ripemd128", $host_id);
1019
1020                 return $guid_prefix.$host_hash;
1021         }
1022
1023         /**
1024          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1025          *
1026          * This can be used to filter for inactive contacts.
1027          * Only do this for public postings to avoid privacy problems, since poco data is public.
1028          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1029          *
1030          * @param array $arr Contains the just posted item record
1031          */
1032         private static function updateContact($arr)
1033         {
1034                 // Unarchive the author
1035                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1036                 if (DBM::is_result($contact)) {
1037                         Contact::unmarkForArchival($contact);
1038                 }
1039
1040                 // Unarchive the contact if it's not our own contact
1041                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1042                 if (DBM::is_result($contact)) {
1043                         Contact::unmarkForArchival($contact);
1044                 }
1045
1046                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1047
1048                 // Is it a forum? Then we don't care about the rules from above
1049                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1050                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1051                                 $update = true;
1052                         }
1053                 }
1054
1055                 if ($update) {
1056                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1057                                 ['id' => $arr['contact-id']]);
1058                 }
1059                 // Now do the same for the system wide contacts with uid=0
1060                 if (!$arr['private']) {
1061                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1062                                 ['id' => $arr['owner-id']]);
1063
1064                         if ($arr['owner-id'] != $arr['author-id']) {
1065                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1066                                         ['id' => $arr['author-id']]);
1067                         }
1068                 }
1069         }
1070
1071         private static function setHashtags(&$item)
1072         {
1073
1074                 $tags = get_tags($item["body"]);
1075
1076                 // No hashtags?
1077                 if (!count($tags)) {
1078                         return false;
1079                 }
1080
1081                 // This sorting is important when there are hashtags that are part of other hashtags
1082                 // Otherwise there could be problems with hashtags like #test and #test2
1083                 rsort($tags);
1084
1085                 $URLSearchString = "^\[\]";
1086
1087                 // All hashtags should point to the home server if "local_tags" is activated
1088                 if (Config::get('system', 'local_tags')) {
1089                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1090                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
1091
1092                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1093                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
1094                 }
1095
1096                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1097                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1098                         function ($match) {
1099                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1100                         }, $item["body"]);
1101
1102                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1103                         function ($match) {
1104                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1105                         }, $item["body"]);
1106
1107                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1108                         function ($match) {
1109                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1110                         }, $item["body"]);
1111
1112                 // Repair recursive urls
1113                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1114                                 "&num;$2", $item["body"]);
1115
1116                 foreach ($tags as $tag) {
1117                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
1118                                 continue;
1119                         }
1120
1121                         $basetag = str_replace('_',' ',substr($tag,1));
1122
1123                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1124
1125                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
1126
1127                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
1128                                 if (strlen($item["tag"])) {
1129                                         $item["tag"] = ','.$item["tag"];
1130                                 }
1131                                 $item["tag"] = $newtag.$item["tag"];
1132                         }
1133                 }
1134
1135                 // Convert back the masked hashtags
1136                 $item["body"] = str_replace("&num;", "#", $item["body"]);
1137         }
1138
1139         public static function getGuidById($id)
1140         {
1141                 $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
1142                 if (DBM::is_result($item)) {
1143                         return $item['guid'];
1144                 } else {
1145                         return '';
1146                 }
1147         }
1148
1149         public static function getIdAndNickByGuid($guid, $uid = 0)
1150         {
1151                 $nick = "";
1152                 $id = 0;
1153
1154                 if ($uid == 0) {
1155                         $uid == local_user();
1156                 }
1157
1158                 // Does the given user have this item?
1159                 if ($uid) {
1160                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1161                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1162                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1163                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
1164                         if (DBM::is_result($item)) {
1165                                 $id = $item["id"];
1166                                 $nick = $item["nickname"];
1167                         }
1168                 }
1169
1170                 // Or is it anywhere on the server?
1171                 if ($nick == "") {
1172                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1173                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1174                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1175                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
1176                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
1177                                         AND NOT `item`.`private` AND `item`.`wall`
1178                                         AND `item`.`guid` = ?", $guid);
1179                         if (DBM::is_result($item)) {
1180                                 $id = $item["id"];
1181                                 $nick = $item["nickname"];
1182                         }
1183                 }
1184                 return ["nick" => $nick, "id" => $id];
1185         }
1186
1187         /**
1188          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1189          * @param int $uid
1190          * @param int $item_id
1191          * @return bool true if item was deleted, else false
1192          */
1193         private static function tagDeliver($uid, $item_id)
1194         {
1195                 $mention = false;
1196
1197                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
1198                 if (!DBM::is_result($user)) {
1199                         return;
1200                 }
1201
1202                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
1203                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
1204
1205                 $item = dba::selectFirst('item', [], ['id' => $item_id]);
1206                 if (!DBM::is_result($item)) {
1207                         return;
1208                 }
1209
1210                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1211
1212                 /*
1213                  * Diaspora uses their own hardwired link URL in @-tags
1214                  * instead of the one we supply with webfinger
1215                  */
1216                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
1217
1218                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1219                 if ($cnt) {
1220                         foreach ($matches as $mtch) {
1221                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
1222                                         $mention = true;
1223                                         logger('mention found: ' . $mtch[2]);
1224                                 }
1225                         }
1226                 }
1227
1228                 if (!$mention) {
1229                         if (($community_page || $prvgroup) &&
1230                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
1231                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
1232                                 // delete it!
1233                                 logger("no-mention top-level post to community or private group. delete.");
1234                                 dba::delete('item', ['id' => $item_id]);
1235                                 return true;
1236                         }
1237                         return;
1238                 }
1239
1240                 $arr = ['item' => $item, 'user' => $user];
1241
1242                 Addon::callHooks('tagged', $arr);
1243
1244                 if (!$community_page && !$prvgroup) {
1245                         return;
1246                 }
1247
1248                 /*
1249                  * tgroup delivery - setup a second delivery chain
1250                  * prevent delivery looping - only proceed
1251                  * if the message originated elsewhere and is a top-level post
1252                  */
1253                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1254                         return;
1255                 }
1256
1257                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1258                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1259                 if (!DBM::is_result($self)) {
1260                         return;
1261                 }
1262
1263                 $owner_id = Contact::getIdForURL($self['url']);
1264
1265                 // also reset all the privacy bits to the forum default permissions
1266
1267                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
1268
1269                 $forum_mode = ($prvgroup ? 2 : 1);
1270
1271                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1272                         'owner-id' => $owner_id, 'owner-name' => $self['name'], 'owner-link' => $self['url'],
1273                         'owner-avatar' => $self['thumb'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
1274                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
1275                 dba::update('item', $fields, ['id' => $item_id]);
1276
1277                 self::updateThread($item_id);
1278
1279                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
1280         }
1281
1282         public static function isRemoteSelf($contact, &$datarray)
1283         {
1284                 $a = get_app();
1285
1286                 if (!$contact['remote_self']) {
1287                         return false;
1288                 }
1289
1290                 // Prevent the forwarding of posts that are forwarded
1291                 if ($datarray["extid"] == NETWORK_DFRN) {
1292                         return false;
1293                 }
1294
1295                 // Prevent to forward already forwarded posts
1296                 if ($datarray["app"] == $a->get_hostname()) {
1297                         return false;
1298                 }
1299
1300                 // Only forward posts
1301                 if ($datarray["verb"] != ACTIVITY_POST) {
1302                         return false;
1303                 }
1304
1305                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
1306                         return false;
1307                 }
1308
1309                 $datarray2 = $datarray;
1310                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
1311                 if ($contact['remote_self'] == 2) {
1312                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
1313                                         ['uid' => $contact['uid'], 'self' => true]);
1314                         if (DBM::is_result($self)) {
1315                                 $datarray['contact-id'] = $self["id"];
1316
1317                                 $datarray['owner-name'] = $self["name"];
1318                                 $datarray['owner-link'] = $self["url"];
1319                                 $datarray['owner-avatar'] = $self["thumb"];
1320
1321                                 $datarray['author-name']   = $datarray['owner-name'];
1322                                 $datarray['author-link']   = $datarray['owner-link'];
1323                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
1324
1325                                 unset($datarray['created']);
1326                                 unset($datarray['edited']);
1327                         }
1328
1329                         if ($contact['network'] != NETWORK_FEED) {
1330                                 $datarray["guid"] = get_guid(32);
1331                                 unset($datarray["plink"]);
1332                                 $datarray["uri"] = item_new_uri($a->get_hostname(), $contact['uid'], $datarray["guid"]);
1333                                 $datarray["parent-uri"] = $datarray["uri"];
1334                                 $datarray["extid"] = $contact['network'];
1335                                 $urlpart = parse_url($datarray2['author-link']);
1336                                 $datarray["app"] = $urlpart["host"];
1337                         } else {
1338                                 $datarray['private'] = 0;
1339                         }
1340                 }
1341
1342                 if ($contact['network'] != NETWORK_FEED) {
1343                         // Store the original post
1344                         $r = self::insert($datarray2, false, false);
1345                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$r.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
1346                 } else {
1347                         $datarray["app"] = "Feed";
1348                 }
1349
1350                 // Trigger automatic reactions for addons
1351                 $datarray['api_source'] = true;
1352
1353                 // We have to tell the hooks who we are - this really should be improved
1354                 $_SESSION["authenticated"] = true;
1355                 $_SESSION["uid"] = $contact['uid'];
1356
1357                 return true;
1358         }
1359
1360         /**
1361          *
1362          * @param string $s
1363          * @param int    $uid
1364          * @param array  $item
1365          * @param int    $cid
1366          * @return string
1367          */
1368         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
1369         {
1370                 if (Config::get('system', 'disable_embedded')) {
1371                         return $s;
1372                 }
1373
1374                 logger('check for photos', LOGGER_DEBUG);
1375                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
1376
1377                 $orig_body = $s;
1378                 $new_body = '';
1379
1380                 $img_start = strpos($orig_body, '[img');
1381                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1382                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1383
1384                 while (($img_st_close !== false) && ($img_len !== false)) {
1385                         $img_st_close++; // make it point to AFTER the closing bracket
1386                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
1387
1388                         logger('found photo ' . $image, LOGGER_DEBUG);
1389
1390                         if (stristr($image, $site . '/photo/')) {
1391                                 // Only embed locally hosted photos
1392                                 $replace = false;
1393                                 $i = basename($image);
1394                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
1395                                 $x = strpos($i, '-');
1396
1397                                 if ($x) {
1398                                         $res = substr($i, $x + 1);
1399                                         $i = substr($i, 0, $x);
1400                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
1401                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
1402                                         if (DBM::is_result($photo)) {
1403                                                 /*
1404                                                  * Check to see if we should replace this photo link with an embedded image
1405                                                  * 1. No need to do so if the photo is public
1406                                                  * 2. If there's a contact-id provided, see if they're in the access list
1407                                                  *    for the photo. If so, embed it.
1408                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
1409                                                  *    permissions, regardless of order but first check to see if they're an exact
1410                                                  *    match to save some processing overhead.
1411                                                  */
1412                                                 if (self::hasPermissions($photo)) {
1413                                                         if ($cid) {
1414                                                                 $recips = self::enumeratePermissions($photo);
1415                                                                 if (in_array($cid, $recips)) {
1416                                                                         $replace = true;
1417                                                                 }
1418                                                         } elseif ($item) {
1419                                                                 if (self::samePermissions($item, $photo)) {
1420                                                                         $replace = true;
1421                                                                 }
1422                                                         }
1423                                                 }
1424                                                 if ($replace) {
1425                                                         $data = $photo['data'];
1426                                                         $type = $photo['type'];
1427
1428                                                         // If a custom width and height were specified, apply before embedding
1429                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
1430                                                                 logger('scaling photo', LOGGER_DEBUG);
1431
1432                                                                 $width = intval($match[1]);
1433                                                                 $height = intval($match[2]);
1434
1435                                                                 $Image = new Image($data, $type);
1436                                                                 if ($Image->isValid()) {
1437                                                                         $Image->scaleDown(max($width, $height));
1438                                                                         $data = $Image->asString();
1439                                                                         $type = $Image->getType();
1440                                                                 }
1441                                                         }
1442
1443                                                         logger('replacing photo', LOGGER_DEBUG);
1444                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
1445                                                         logger('replaced: ' . $image, LOGGER_DATA);
1446                                                 }
1447                                         }
1448                                 }
1449                         }
1450
1451                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
1452                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
1453                         if ($orig_body === false) {
1454                                 $orig_body = '';
1455                         }
1456
1457                         $img_start = strpos($orig_body, '[img');
1458                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
1459                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
1460                 }
1461
1462                 $new_body = $new_body . $orig_body;
1463
1464                 return $new_body;
1465         }
1466
1467         private static function hasPermissions($obj)
1468         {
1469                 return (
1470                         (
1471                                 x($obj, 'allow_cid')
1472                         ) || (
1473                                 x($obj, 'allow_gid')
1474                         ) || (
1475                                 x($obj, 'deny_cid')
1476                         ) || (
1477                                 x($obj, 'deny_gid')
1478                         )
1479                 );
1480         }
1481
1482         private static function samePermissions($obj1, $obj2)
1483         {
1484                 // first part is easy. Check that these are exactly the same.
1485                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
1486                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
1487                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
1488                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
1489                         return true;
1490                 }
1491
1492                 // This is harder. Parse all the permissions and compare the resulting set.
1493                 $recipients1 = self::enumeratePermissions($obj1);
1494                 $recipients2 = self::enumeratePermissions($obj2);
1495                 sort($recipients1);
1496                 sort($recipients2);
1497
1498                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
1499                 return ($recipients1 == $recipients2);
1500         }
1501
1502         // returns an array of contact-ids that are allowed to see this object
1503         private static function enumeratePermissions($obj)
1504         {
1505                 $allow_people = expand_acl($obj['allow_cid']);
1506                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
1507                 $deny_people  = expand_acl($obj['deny_cid']);
1508                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
1509                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
1510                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
1511                 $recipients   = array_diff($recipients, $deny);
1512                 return $recipients;
1513         }
1514
1515         public static function getFeedTags($item)
1516         {
1517                 $ret = [];
1518                 $matches = false;
1519                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
1520                 if ($cnt) {
1521                         for ($x = 0; $x < $cnt; $x ++) {
1522                                 if ($matches[1][$x]) {
1523                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
1524                                 }
1525                         }
1526                 }
1527                 $matches = false;
1528                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
1529                 if ($cnt) {
1530                         for ($x = 0; $x < $cnt; $x ++) {
1531                                 if ($matches[1][$x]) {
1532                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
1533                                 }
1534                         }
1535                 }
1536                 return $ret;
1537         }
1538
1539         public static function expire($uid, $days, $network = "", $force = false)
1540         {
1541                 if (!$uid || ($days < 1)) {
1542                         return;
1543                 }
1544
1545                 /*
1546                  * $expire_network_only = save your own wall posts
1547                  * and just expire conversations started by others
1548                  */
1549                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
1550                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
1551
1552                 if ($network != "") {
1553                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
1554
1555                         /*
1556                          * There is an index "uid_network_received" but not "uid_network_created"
1557                          * This avoids the creation of another index just for one purpose.
1558                          * And it doesn't really matter wether to look at "received" or "created"
1559                          */
1560                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
1561                 } else {
1562                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
1563                 }
1564
1565                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
1566                         WHERE `uid` = %d $range
1567                         AND `id` = `parent`
1568                         $sql_extra
1569                         AND `deleted` = 0",
1570                         intval($uid),
1571                         intval($days)
1572                 );
1573
1574                 if (!DBM::is_result($r)) {
1575                         return;
1576                 }
1577
1578                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
1579
1580                 // Forcing expiring of items - but not notes and marked items
1581                 if ($force) {
1582                         $expire_items = true;
1583                 }
1584
1585                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
1586                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
1587                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
1588
1589                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
1590
1591                 foreach ($r as $item) {
1592
1593                         // don't expire filed items
1594
1595                         if (strpos($item['file'],'[') !== false) {
1596                                 continue;
1597                         }
1598
1599                         // Only expire posts, not photos and photo comments
1600
1601                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
1602                                 continue;
1603                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
1604                                 continue;
1605                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
1606                                 continue;
1607                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
1608                                 continue;
1609                         }
1610
1611                         self::deleteById($item['id'], PRIORITY_LOW);
1612                 }
1613         }
1614
1615         public static function firstPostDate($uid, $wall = false)
1616         {
1617                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
1618                 $params = ['order' => ['created' => false]];
1619                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
1620                 if (DBM::is_result($thread)) {
1621                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
1622                 }
1623                 return false;
1624         }
1625
1626         /**
1627          * @brief add/remove activity to an item
1628          *
1629          * Toggle activities as like,dislike,attend of an item
1630          *
1631          * @param string $item_id
1632          * @param string $verb
1633          *              Activity verb. One of
1634          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
1635          *                      attendno, unattendno, attendmaybe, unattendmaybe
1636          * @hook 'post_local_end'
1637          *              array $arr
1638          *                      'post_id' => ID of posted item
1639          */
1640         public static function performLike($item_id, $verb)
1641         {
1642                 if (!local_user() && !remote_user()) {
1643                         return false;
1644                 }
1645
1646                 switch ($verb) {
1647                         case 'like':
1648                         case 'unlike':
1649                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
1650                                 $activity = ACTIVITY_LIKE;
1651                                 break;
1652                         case 'dislike':
1653                         case 'undislike':
1654                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
1655                                 $activity = ACTIVITY_DISLIKE;
1656                                 break;
1657                         case 'attendyes':
1658                         case 'unattendyes':
1659                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
1660                                 $activity = ACTIVITY_ATTEND;
1661                                 break;
1662                         case 'attendno':
1663                         case 'unattendno':
1664                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
1665                                 $activity = ACTIVITY_ATTENDNO;
1666                                 break;
1667                         case 'attendmaybe':
1668                         case 'unattendmaybe':
1669                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
1670                                 $activity = ACTIVITY_ATTENDMAYBE;
1671                                 break;
1672                         default:
1673                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
1674                                 return false;
1675                 }
1676
1677                 // Enable activity toggling instead of on/off
1678                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
1679
1680                 logger('like: verb ' . $verb . ' item ' . $item_id);
1681
1682                 $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
1683                 if (!DBM::is_result($item)) {
1684                         logger('like: unknown item ' . $item_id);
1685                         return false;
1686                 }
1687
1688                 $uid = $item['uid'];
1689                 if (($uid == 0) && local_user()) {
1690                         $uid = local_user();
1691                 }
1692
1693                 if (!can_write_wall($uid)) {
1694                         logger('like: unable to write on wall ' . $uid);
1695                         return false;
1696                 }
1697
1698                 // Retrieves the local post owner
1699                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
1700                 if (!DBM::is_result($owner_self_contact)) {
1701                         logger('like: unknown owner ' . $uid);
1702                         return false;
1703                 }
1704
1705                 // Retrieve the current logged in user's public contact
1706                 $author_id = public_contact();
1707
1708                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
1709                 if (!DBM::is_result($author_contact)) {
1710                         logger('like: unknown author ' . $author_id);
1711                         return false;
1712                 }
1713
1714                 // Contact-id is the uid-dependant author contact
1715                 if (local_user() == $uid) {
1716                         $item_contact_id = $owner_self_contact['id'];
1717                         $item_contact = $owner_self_contact;
1718                 } else {
1719                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
1720                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
1721                         if (!DBM::is_result($item_contact)) {
1722                                 logger('like: unknown item contact ' . $item_contact_id);
1723                                 return false;
1724                         }
1725                 }
1726
1727                 // Look for an existing verb row
1728                 // event participation are essentially radio toggles. If you make a subsequent choice,
1729                 // we need to eradicate your first choice.
1730                 if ($event_verb_flag) {
1731                         $verbs = "'" . dbesc(ACTIVITY_ATTEND) . "', '" . dbesc(ACTIVITY_ATTENDNO) . "', '" . dbesc(ACTIVITY_ATTENDMAYBE) . "'";
1732                 } else {
1733                         $verbs = "'".dbesc($activity)."'";
1734                 }
1735
1736                 /// @todo This query is expected to be a performance eater due to the "OR" - it has to be changed totally
1737                 $existing_like = q("SELECT `id`, `guid`, `verb` FROM `item`
1738                         WHERE `verb` IN ($verbs)
1739                         AND `deleted` = 0
1740                         AND `author-id` = %d
1741                         AND `uid` = %d
1742                         AND (`parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s')
1743                         LIMIT 1",
1744                         intval($author_contact['id']),
1745                         intval($item['uid']),
1746                         dbesc($item_id), dbesc($item_id), dbesc($item['uri'])
1747                 );
1748
1749                 // If it exists, mark it as deleted
1750                 if (DBM::is_result($existing_like)) {
1751                         $like_item = $existing_like[0];
1752
1753                         // Already voted, undo it
1754                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
1755                         dba::update('item', $fields, ['id' => $like_item['id']]);
1756
1757                         // Clean up the Diaspora signatures for this like
1758                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
1759                         // if it had been enabled in the past
1760                         dba::delete('sign', ['iid' => $like_item['id']]);
1761
1762                         $like_item_id = $like_item['id'];
1763                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
1764
1765                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
1766                                 return true;
1767                         }
1768                 }
1769
1770                 // Verb is "un-something", just trying to delete existing entries
1771                 if (strpos($verb, 'un') === 0) {
1772                         return true;
1773                 }
1774
1775                 // Else or if event verb different from existing row, create a new item row
1776                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
1777                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
1778                         $post_type = L10n::t('event');
1779                 }
1780                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
1781                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
1782                 $body = $item['body'];
1783
1784                 $obj = <<< EOT
1785
1786                 <object>
1787                         <type>$objtype</type>
1788                         <local>1</local>
1789                         <id>{$item['uri']}</id>
1790                         <link>$link</link>
1791                         <title></title>
1792                         <content>$body</content>
1793                 </object>
1794 EOT;
1795
1796                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
1797                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
1798                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
1799
1800                 $new_item = [
1801                         'guid'          => get_guid(32),
1802                         'uri'           => item_new_uri(self::getApp()->get_hostname(), $item['uid']),
1803                         'uid'           => $item['uid'],
1804                         'contact-id'    => $item_contact_id,
1805                         'type'          => 'activity',
1806                         'wall'          => $item['wall'],
1807                         'origin'        => 1,
1808                         'gravity'       => GRAVITY_LIKE,
1809                         'parent'        => $item['id'],
1810                         'parent-uri'    => $item['uri'],
1811                         'thr-parent'    => $item['uri'],
1812                         'owner-id'      => $item['owner-id'],
1813                         'owner-name'    => $item['owner-name'],
1814                         'owner-link'    => $item['owner-link'],
1815                         'owner-avatar'  => $item['owner-avatar'],
1816                         'author-id'     => $author_contact['id'],
1817                         'author-name'   => $author_contact['name'],
1818                         'author-link'   => $author_contact['url'],
1819                         'author-avatar' => $author_contact['thumb'],
1820                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
1821                         'verb'          => $activity,
1822                         'object-type'   => $objtype,
1823                         'object'        => $obj,
1824                         'allow_cid'     => $item['allow_cid'],
1825                         'allow_gid'     => $item['allow_gid'],
1826                         'deny_cid'      => $item['deny_cid'],
1827                         'deny_gid'      => $item['deny_gid'],
1828                         'visible'       => 1,
1829                         'unseen'        => 1,
1830                 ];
1831
1832                 $new_item_id = self::insert($new_item);
1833
1834                 // If the parent item isn't visible then set it to visible
1835                 if (!$item['visible']) {
1836                         self::update(['visible' => true], ['id' => $item['id']]);
1837                 }
1838
1839                 // Save the author information for the like in case we need to relay to Diaspora
1840                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
1841
1842                 $new_item['id'] = $new_item_id;
1843
1844                 Addon::callHooks('post_local_end', $new_item);
1845
1846                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
1847
1848                 return true;
1849         }
1850
1851         private static function addThread($itemid, $onlyshadow = false)
1852         {
1853                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
1854                         'moderated', 'visible', 'spam', 'starred', 'bookmark', 'contact-id',
1855                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
1856                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
1857                 $item = dba::selectFirst('item', $fields, $condition);
1858
1859                 if (!DBM::is_result($item)) {
1860                         return;
1861                 }
1862
1863                 $item['iid'] = $itemid;
1864
1865                 if (!$onlyshadow) {
1866                         $result = dba::insert('thread', $item);
1867
1868                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
1869                 }
1870         }
1871
1872         private static function updateThread($itemid, $setmention = false)
1873         {
1874                 $fields = ['uid', 'guid', 'title', 'body', 'created', 'edited', 'commented', 'received', 'changed',
1875                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'spam', 'starred', 'bookmark', 'contact-id',
1876                         'deleted', 'origin', 'forum_mode', 'network', 'rendered-html', 'rendered-hash'];
1877                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
1878
1879                 $item = dba::selectFirst('item', $fields, $condition);
1880                 if (!DBM::is_result($item)) {
1881                         return;
1882                 }
1883
1884                 if ($setmention) {
1885                         $item["mention"] = 1;
1886                 }
1887
1888                 $sql = "";
1889
1890                 $fields = [];
1891
1892                 foreach ($item as $field => $data) {
1893                         if (!in_array($field, ["guid", "title", "body", "rendered-html", "rendered-hash"])) {
1894                                 $fields[$field] = $data;
1895                         }
1896                 }
1897
1898                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
1899
1900                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result." ".print_r($item, true), LOGGER_DEBUG);
1901
1902                 // Updating a shadow item entry
1903                 $items = dba::selectFirst('item', ['id'], ['guid' => $item['guid'], 'uid' => 0]);
1904
1905                 if (!DBM::is_result($items)) {
1906                         return;
1907                 }
1908
1909                 $fields = ['title' => $item['title'], 'body' => $item['body'],
1910                         'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
1911                 $result = dba::update('item', $fields, ['id' => $items['id']]);
1912
1913                 logger("Updating public shadow for post ".$items["id"]." - guid ".$item["guid"]." Result: ".print_r($result, true), LOGGER_DEBUG);
1914         }
1915
1916         private static function deleteThread($itemid, $itemuri = "")
1917         {
1918                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
1919                 if (!DBM::is_result($item)) {
1920                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
1921                         return;
1922                 }
1923
1924                 // Using dba::delete at this time could delete the associated item entries
1925                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
1926
1927                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
1928
1929                 if ($itemuri != "") {
1930                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
1931                         if (!dba::exists('item', $condition)) {
1932                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
1933                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
1934                         }
1935                 }
1936         }
1937 }