src/Model/Item.php

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