include/items.php

   1 <?php
   2
   3 require_once('include/bbcode.php');
   4 require_once('include/oembed.php');
   5 require_once('include/salmon.php');
   6 require_once('include/crypto.php');
   7
   8 function get_feed_for(&$a, $dfrn_id, $owner_nick, $last_update, $direction = 0) {
   9
  10         // default permissions - anonymous user
  11
  12         if(! strlen($owner_nick))
  13                 killme();
  14
  15         $public_feed = (($dfrn_id) ? false : true);
  16         $starred = false;
  17         $converse = false;
  18
  19         if($public_feed && $a->argc > 2) {
  20                 for($x = 2; $x < $a->argc; $x++) {
  21                         if($a->argv[$x] == 'converse')
  22                                 $converse = true;
  23                         if($a->argv[$x] == 'starred')
  24                                 $starred = true;
  25                 }
  26         }
  27
  28
  29         $sql_extra = " AND `allow_cid` = '' AND `allow_gid` = '' AND `deny_cid`  = '' AND `deny_gid`  = '' ";
  30
  31         $r = q("SELECT `contact`.*, `user`.`uid` AS `user_uid`, `user`.`nickname`, `user`.`timezone`
  32                 FROM `contact` LEFT JOIN `user` ON `user`.`uid` = `contact`.`uid`
  33                 WHERE `contact`.`self` = 1 AND `user`.`nickname` = '%s' LIMIT 1",
  34                 dbesc($owner_nick)
  35         );
  36
  37         if(! count($r))
  38                 killme();
  39
  40         $owner = $r[0];
  41         $owner_id = $owner['user_uid'];
  42         $owner_nick = $owner['nickname'];
  43
  44         $birthday = feed_birthday($owner_id,$owner['timezone']);
  45
  46         if(! $public_feed) {
  47
  48                 $sql_extra = '';
  49                 switch($direction) {
  50                         case (-1):
  51                                 $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
  52                                 $my_id = $dfrn_id;
  53                                 break;
  54                         case 0:
  55                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  56                                 $my_id = '1:' . $dfrn_id;
  57                                 break;
  58                         case 1:
  59                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  60                                 $my_id = '0:' . $dfrn_id;
  61                                 break;
  62                         default:
  63                                 return false;
  64                                 break; // NOTREACHED
  65                 }
  66
  67                 $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 AND `contact`.`uid` = %d $sql_extra LIMIT 1",
  68                         intval($owner_id)
  69                 );
  70
  71                 if(! count($r))
  72                         killme();
  73
  74                 $contact = $r[0];
  75                 $groups = init_groups_visitor($contact['id']);
  76
  77                 if(count($groups)) {
  78                         for($x = 0; $x < count($groups); $x ++)
  79                                 $groups[$x] = '<' . intval($groups[$x]) . '>' ;
  80                         $gs = implode('|', $groups);
  81                 }
  82                 else
  83                         $gs = '<<>>' ; // Impossible to match
  84
  85                 $sql_extra = sprintf("
  86                         AND ( `allow_cid` = '' OR     `allow_cid` REGEXP '<%d>' )
  87                         AND ( `deny_cid`  = '' OR NOT `deny_cid`  REGEXP '<%d>' )
  88                         AND ( `allow_gid` = '' OR     `allow_gid` REGEXP '%s' )
  89                         AND ( `deny_gid`  = '' OR NOT `deny_gid`  REGEXP '%s')
  90                 ",
  91                         intval($contact['id']),
  92                         intval($contact['id']),
  93                         dbesc($gs),
  94                         dbesc($gs)
  95                 );
  96         }
  97
  98         if($public_feed)
  99                 $sort = 'DESC';
 100         else
 101                 $sort = 'ASC';
 102
 103         if(! strlen($last_update))
 104                 $last_update = 'now -30 days';
 105
 106         if($public_feed) {
 107                 if(! $converse)
 108                         $sql_extra .= " AND `contact`.`self` = 1 ";
 109         }
 110
 111         $check_date = datetime_convert('UTC','UTC',$last_update,'Y-m-d H:i:s');
 112
 113         $r = q("SELECT `item`.*, `item`.`id` AS `item_id`,
 114                 `contact`.`name`, `contact`.`photo`, `contact`.`url`,
 115                 `contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 116                 `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
 117                 `contact`.`id` AS `contact-id`, `contact`.`uid` AS `contact-uid`,
 118                 `sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
 119                 FROM `item` LEFT JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 120                 LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 121                 WHERE `item`.`uid` = %d AND `item`.`visible` = 1 AND `item`.`parent` != 0
 122                 AND `item`.`wall` = 1 AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
 123                 AND ( `item`.`edited` > '%s' OR `item`.`changed` > '%s' )
 124                 $sql_extra
 125                 ORDER BY `parent` %s, `created` ASC LIMIT 0, 300",
 126                 intval($owner_id),
 127                 dbesc($check_date),
 128                 dbesc($check_date),
 129                 dbesc($sort)
 130         );
 131
 132         // Will check further below if this actually returned results.
 133         // We will provide an empty feed if that is the case.
 134
 135         $items = $r;
 136
 137         $feed_template = get_markup_template(($dfrn_id) ? 'atom_feed_dfrn.tpl' : 'atom_feed.tpl');
 138
 139         $atom = '';
 140
 141         $hubxml = feed_hublinks();
 142
 143         $salmon = feed_salmonlinks($owner_nick);
 144
 145         $atom .= replace_macros($feed_template, array(
 146                 '$version'      => xmlify(FRIENDIKA_VERSION),
 147                 '$feed_id'      => xmlify($a->get_baseurl() . '/profile/' . $owner_nick),
 148                 '$feed_title'   => xmlify($owner['name']),
 149                 '$feed_updated' => xmlify(datetime_convert('UTC', 'UTC', 'now' , ATOM_TIME)) ,
 150                 '$hub'          => $hubxml,
 151                 '$salmon'       => $salmon,
 152                 '$name'         => xmlify($owner['name']),
 153                 '$profile_page' => xmlify($owner['url']),
 154                 '$photo'        => xmlify($owner['photo']),
 155                 '$thumb'        => xmlify($owner['thumb']),
 156                 '$picdate'      => xmlify(datetime_convert('UTC','UTC',$owner['avatar-date'] . '+00:00' , ATOM_TIME)) ,
 157                 '$uridate'      => xmlify(datetime_convert('UTC','UTC',$owner['uri-date']    . '+00:00' , ATOM_TIME)) ,
 158                 '$namdate'      => xmlify(datetime_convert('UTC','UTC',$owner['name-date']   . '+00:00' , ATOM_TIME)) ,
 159                 '$birthday'     => ((strlen($birthday)) ? '<dfrn:birthday>' . xmlify($birthday) . '</dfrn:birthday>' : '')
 160         ));
 161
 162         call_hooks('atom_feed', $atom);
 163
 164         if(! count($items)) {
 165
 166                 call_hooks('atom_feed_end', $atom);
 167
 168                 $atom .= '</feed>' . "\r\n";
 169                 return $atom;
 170         }
 171
 172         foreach($items as $item) {
 173
 174                 // public feeds get html, our own nodes use bbcode
 175
 176                 if($public_feed) {
 177                         $type = 'html';
 178                         // catch any email that's in a public conversation and make sure it doesn't leak
 179                         if($item['private'])
 180                                 continue;
 181                 }
 182                 else {
 183                         $type = 'text';
 184                 }
 185
 186                 $atom .= atom_entry($item,$type,null,$owner,true);
 187         }
 188
 189         call_hooks('atom_feed_end', $atom);
 190
 191         $atom .= '</feed>' . "\r\n";
 192
 193         return $atom;
 194 }
 195
 196
 197 function construct_verb($item) {
 198         if($item['verb'])
 199                 return $item['verb'];
 200         return ACTIVITY_POST;
 201 }
 202
 203 function construct_activity_object($item) {
 204
 205         if($item['object']) {
 206                 $o = '<as:object>' . "\r\n";
 207                 $r = parse_xml_string($item['object'],false);
 208
 209
 210                 if(! $r)
 211                         return '';
 212                 if($r->type)
 213                         $o .= '<as:object-type>' . xmlify($r->type) . '</as:object-type>' . "\r\n";
 214                 if($r->id)
 215                         $o .= '<id>' . xmlify($r->id) . '</id>' . "\r\n";
 216                 if($r->title)
 217                         $o .= '<title>' . xmlify($r->title) . '</title>' . "\r\n";
 218                 if($r->link) {
 219                         if(substr($r->link,0,1) === '<') {
 220                                 // patch up some facebook "like" activity objects that got stored incorrectly
 221                                 // for a couple of months prior to 9-Jun-2011 and generated bad XML.
 222                                 // we can probably remove this hack here and in the following function in a few months time.
 223                                 if(strstr($r->link,'&') && (! strstr($r->link,'&amp;')))
 224                                         $r->link = str_replace('&','&amp;', $r->link);
 225                                 $r->link = preg_replace('/\<link(.*?)\"\>/','<link$1"/>',$r->link);
 226                                 $o .= $r->link;
 227                         }
 228                         else
 229                                 $o .= '<link rel="alternate" type="text/html" href="' . xmlify($r->link) . '" />' . "\r\n";
 230                 }
 231                 if($r->content)
 232                         $o .= '<content type="html" >' . xmlify(bbcode($r->content)) . '</content>' . "\r\n";
 233                 $o .= '</as:object>' . "\r\n";
 234                 return $o;
 235         }
 236
 237         return '';
 238 }
 239
 240 function construct_activity_target($item) {
 241
 242         if($item['target']) {
 243                 $o = '<as:target>' . "\r\n";
 244                 $r = parse_xml_string($item['target'],false);
 245                 if(! $r)
 246                         return '';
 247                 if($r->type)
 248                         $o .= '<as:object-type>' . xmlify($r->type) . '</as:object-type>' . "\r\n";
 249                 if($r->id)
 250                         $o .= '<id>' . xmlify($r->id) . '</id>' . "\r\n";
 251                 if($r->title)
 252                         $o .= '<title>' . xmlify($r->title) . '</title>' . "\r\n";
 253                 if($r->link) {
 254                         if(substr($r->link,0,1) === '<') {
 255                                 if(strstr($r->link,'&') && (! strstr($r->link,'&amp;')))
 256                                         $r->link = str_replace('&','&amp;', $r->link);
 257                                 $r->link = preg_replace('/\<link(.*?)\"\>/','<link$1"/>',$r->link);
 258                                 $o .= $r->link;
 259                         }
 260                         else
 261                                 $o .= '<link rel="alternate" type="text/html" href="' . xmlify($r->link) . '" />' . "\r\n";
 262                 }
 263                 if($r->content)
 264                         $o .= '<content type="html" >' . xmlify(bbcode($r->content)) . '</content>' . "\r\n";
 265                 $o .= '</as:target>' . "\r\n";
 266                 return $o;
 267         }
 268
 269         return '';
 270 }
 271
 272
 273
 274
 275 function get_atom_elements($feed,$item) {
 276
 277         require_once('library/HTMLPurifier.auto.php');
 278         require_once('include/html2bbcode.php');
 279
 280         $best_photo = array();
 281
 282         $res = array();
 283
 284         $author = $item->get_author();
 285         if($author) {
 286                 $res['author-name'] = unxmlify($author->get_name());
 287                 $res['author-link'] = unxmlify($author->get_link());
 288         }
 289         else {
 290                 $res['author-name'] = unxmlify($feed->get_title());
 291                 $res['author-link'] = unxmlify($feed->get_permalink());
 292         }
 293         $res['uri'] = unxmlify($item->get_id());
 294         $res['title'] = unxmlify($item->get_title());
 295         $res['body'] = unxmlify($item->get_content());
 296         $res['plink'] = unxmlify($item->get_link(0));
 297
 298         // look for a photo. We should check media size and find the best one,
 299         // but for now let's just find any author photo
 300
 301         $rawauthor = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'author');
 302
 303         if($rawauthor && $rawauthor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link']) {
 304                 $base = $rawauthor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'];
 305                 foreach($base as $link) {
 306                         if(! $res['author-avatar']) {
 307                                 if($link['attribs']['']['rel'] === 'photo' || $link['attribs']['']['rel'] === 'avatar')
 308                                         $res['author-avatar'] = unxmlify($link['attribs']['']['href']);
 309                         }
 310                 }
 311         }
 312
 313         $rawactor = $item->get_item_tags(NAMESPACE_ACTIVITY, 'actor');
 314
 315         if($rawactor && activity_match($rawactor[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data'],ACTIVITY_OBJ_PERSON)) {
 316                 $base = $rawactor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'];
 317                 if($base && count($base)) {
 318                         foreach($base as $link) {
 319                                 if($link['attribs']['']['rel'] === 'alternate' && (! $res['author-link']))
 320                                         $res['author-link'] = unxmlify($link['attribs']['']['href']);
 321                                 if(! $res['author-avatar']) {
 322                                         if($link['attribs']['']['rel'] === 'avatar' || $link['attribs']['']['rel'] === 'photo')
 323                                                 $res['author-avatar'] = unxmlify($link['attribs']['']['href']);
 324                                 }
 325                         }
 326                 }
 327         }
 328
 329         // No photo/profile-link on the item - look at the feed level
 330
 331         if((! (x($res,'author-link'))) || (! (x($res,'author-avatar')))) {
 332                 $rawauthor = $feed->get_feed_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'author');
 333                 if($rawauthor && $rawauthor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link']) {
 334                         $base = $rawauthor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'];
 335                         foreach($base as $link) {
 336                                 if($link['attribs']['']['rel'] === 'alternate' && (! $res['author-link']))
 337                                         $res['author-link'] = unxmlify($link['attribs']['']['href']);
 338                                 if(! $res['author-avatar']) {
 339                                         if($link['attribs']['']['rel'] === 'photo' || $link['attribs']['']['rel'] === 'avatar')
 340                                                 $res['author-avatar'] = unxmlify($link['attribs']['']['href']);
 341                                 }
 342                         }
 343                 }
 344
 345                 $rawactor = $feed->get_feed_tags(NAMESPACE_ACTIVITY, 'subject');
 346
 347                 if($rawactor && activity_match($rawactor[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data'],ACTIVITY_OBJ_PERSON)) {
 348                         $base = $rawactor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'];
 349
 350                         if($base && count($base)) {
 351                                 foreach($base as $link) {
 352                                         if($link['attribs']['']['rel'] === 'alternate' && (! $res['author-link']))
 353                                                 $res['author-link'] = unxmlify($link['attribs']['']['href']);
 354                                         if(! (x($res,'author-avatar'))) {
 355                                                 if($link['attribs']['']['rel'] === 'avatar' || $link['attribs']['']['rel'] === 'photo')
 356                                                         $res['author-avatar'] = unxmlify($link['attribs']['']['href']);
 357                                         }
 358                                 }
 359                         }
 360                 }
 361         }
 362
 363         $apps = $item->get_item_tags(NAMESPACE_STATUSNET,'notice_info');
 364         if($apps && $apps[0]['attribs']['']['source']) {
 365                 $res['app'] = strip_tags(unxmlify($apps[0]['attribs']['']['source']));
 366                 if($res['app'] === 'web')
 367                         $res['app'] = 'OStatus';
 368         }
 369
 370         // base64 encoded json structure representing Diaspora signature
 371
 372         $dsig = $item->get_item_tags(NAMESPACE_DFRN,'diaspora_signature');
 373         if($dsig) {
 374                 $res['dsprsig'] = unxmlify($dsig[0]['data']);
 375         }
 376
 377         $dguid = $item->get_item_tags(NAMESPACE_DFRN,'diaspora_guid');
 378         if($dguid)
 379                 $res['guid'] = unxmlify($dguid[0]['data']);
 380
 381         $bm = $item->get_item_tags(NAMESPACE_DFRN,'bookmark');
 382         if($bm)
 383                 $res['bookmark'] = ((unxmlify($bm[0]['data']) === 'true') ? 1 : 0);
 384
 385
 386         /**
 387          * If there's a copy of the body content which is guaranteed to have survived mangling in transit, use it.
 388          */
 389
 390         $have_real_body = false;
 391
 392         $rawenv = $item->get_item_tags(NAMESPACE_DFRN, 'env');
 393         if($rawenv) {
 394                 $have_real_body = true;
 395                 $res['body'] = $rawenv[0]['data'];
 396                 $res['body'] = str_replace(array(' ',"\t","\r","\n"), array('','','',''),$res['body']);
 397                 // make sure nobody is trying to sneak some html tags by us
 398                 $res['body'] = notags(base64url_decode($res['body']));
 399         }
 400
 401         $maxlen = get_max_import_size();
 402         if($maxlen && (strlen($res['body']) > $maxlen))
 403                 $res['body'] = substr($res['body'],0, $maxlen);
 404
 405         // It isn't certain at this point whether our content is plaintext or html and we'd be foolish to trust
 406         // the content type. Our own network only emits text normally, though it might have been converted to
 407         // html if we used a pubsubhubbub transport. But if we see even one html tag in our text, we will
 408         // have to assume it is all html and needs to be purified.
 409
 410         // It doesn't matter all that much security wise - because before this content is used anywhere, we are
 411         // going to escape any tags we find regardless, but this lets us import a limited subset of html from
 412         // the wild, by sanitising it and converting supported tags to bbcode before we rip out any remaining
 413         // html.
 414
 415         if((strpos($res['body'],'<') !== false) || (strpos($res['body'],'>') !== false)) {
 416
 417                 $res['body'] = preg_replace('#<object[^>]+>.+?' . 'http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s',
 418                         '[youtube]$1[/youtube]', $res['body']);
 419
 420                 $res['body'] = preg_replace('#<iframe[^>].+?' . 'http://www.youtube.com/embed/([A-Za-z0-9\-_=]+).+?</iframe>#s',
 421                         '[youtube]$1[/youtube]', $res['body']);
 422
 423                 $res['body'] = oembed_html2bbcode($res['body']);
 424
 425                 $config = HTMLPurifier_Config::createDefault();
 426                 $config->set('Cache.DefinitionImpl', null);
 427
 428                 // we shouldn't need a whitelist, because the bbcode converter
 429                 // will strip out any unsupported tags.
 430                 // $config->set('HTML.Allowed', 'p,b,a[href],i');
 431
 432                 $purifier = new HTMLPurifier($config);
 433                 $res['body'] = $purifier->purify($res['body']);
 434
 435                 $res['body'] = html2bbcode($res['body']);
 436         }
 437
 438         $allow = $item->get_item_tags(NAMESPACE_DFRN,'comment-allow');
 439         if($allow && $allow[0]['data'] == 1)
 440                 $res['last-child'] = 1;
 441         else
 442                 $res['last-child'] = 0;
 443
 444         $private = $item->get_item_tags(NAMESPACE_DFRN,'private');
 445         if($private && $private[0]['data'] == 1)
 446                 $res['private'] = 1;
 447         else
 448                 $res['private'] = 0;
 449
 450         $extid = $item->get_item_tags(NAMESPACE_DFRN,'extid');
 451         if($extid && $extid[0]['data'])
 452                 $res['extid'] = $extid[0]['data'];
 453
 454         $rawlocation = $item->get_item_tags(NAMESPACE_DFRN, 'location');
 455         if($rawlocation)
 456                 $res['location'] = unxmlify($rawlocation[0]['data']);
 457
 458
 459         $rawcreated = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'published');
 460         if($rawcreated)
 461                 $res['created'] = unxmlify($rawcreated[0]['data']);
 462
 463
 464         $rawedited = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'updated');
 465         if($rawedited)
 466                 $res['edited'] = unxmlify($rawedited[0]['data']);
 467
 468         if((x($res,'edited')) && (! (x($res,'created'))))
 469                 $res['created'] = $res['edited'];
 470
 471         if(! $res['created'])
 472                 $res['created'] = $item->get_date('c');
 473
 474         if(! $res['edited'])
 475                 $res['edited'] = $item->get_date('c');
 476
 477
 478         // Disallow time travelling posts
 479
 480         $d1 = strtotime($res['created']);
 481         $d2 = strtotime($res['edited']);
 482         $d3 = strtotime('now');
 483
 484         if($d1 > $d3)
 485                 $res['created'] = datetime_convert();
 486         if($d2 > $d3)
 487                 $res['edited'] = datetime_convert();
 488
 489         $rawowner = $item->get_item_tags(NAMESPACE_DFRN, 'owner');
 490         if($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['name'][0]['data'])
 491                 $res['owner-name'] = unxmlify($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['name'][0]['data']);
 492         elseif($rawowner[0]['child'][NAMESPACE_DFRN]['name'][0]['data'])
 493                 $res['owner-name'] = unxmlify($rawowner[0]['child'][NAMESPACE_DFRN]['name'][0]['data']);
 494         if($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['uri'][0]['data'])
 495                 $res['owner-link'] = unxmlify($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['uri'][0]['data']);
 496         elseif($rawowner[0]['child'][NAMESPACE_DFRN]['uri'][0]['data'])
 497                 $res['owner-link'] = unxmlify($rawowner[0]['child'][NAMESPACE_DFRN]['uri'][0]['data']);
 498
 499         if($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link']) {
 500                 $base = $rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'];
 501
 502                 foreach($base as $link) {
 503                         if(! $res['owner-avatar']) {
 504                                 if($link['attribs']['']['rel'] === 'photo' || $link['attribs']['']['rel'] === 'avatar')
 505                                         $res['owner-avatar'] = unxmlify($link['attribs']['']['href']);
 506                         }
 507                 }
 508         }
 509
 510         $rawgeo = $item->get_item_tags(NAMESPACE_GEORSS,'point');
 511         if($rawgeo)
 512                 $res['coord'] = unxmlify($rawgeo[0]['data']);
 513
 514
 515         $rawverb = $item->get_item_tags(NAMESPACE_ACTIVITY, 'verb');
 516
 517         // select between supported verbs
 518
 519         if($rawverb) {
 520                 $res['verb'] = unxmlify($rawverb[0]['data']);
 521         }
 522
 523         // translate OStatus unfollow to activity streams if it happened to get selected
 524
 525         if((x($res,'verb')) && ($res['verb'] === 'http://ostatus.org/schema/1.0/unfollow'))
 526                 $res['verb'] = ACTIVITY_UNFOLLOW;
 527
 528         $cats = $item->get_categories();
 529         if($cats) {
 530                 $tag_arr = array();
 531                 foreach($cats as $cat) {
 532                         $term = $cat->get_term();
 533                         if(! $term)
 534                                 $term = $cat->get_label();
 535                         $scheme = $cat->get_scheme();
 536                         if($scheme && $term && stristr($scheme,'X-DFRN:'))
 537                                 $tag_arr[] = substr($scheme,7,1) . '[url=' . unxmlify(substr($scheme,9)) . ']' . unxmlify($term) . '[/url]';
 538                         elseif($term)
 539                                 $tag_arr[] = notags(trim($term));
 540                 }
 541                 $res['tag'] =  implode(',', $tag_arr);
 542         }
 543
 544         $attach = $item->get_enclosures();
 545         if($attach) {
 546                 $att_arr = array();
 547                 foreach($attach as $att) {
 548                         $len   = intval($att->get_length());
 549                         $link  = str_replace(array(',','"'),array('%2D','%22'),notags(trim(unxmlify($att->get_link()))));
 550                         $title = str_replace(array(',','"'),array('%2D','%22'),notags(trim(unxmlify($att->get_title()))));
 551                         $type  = str_replace(array(',','"'),array('%2D','%22'),notags(trim(unxmlify($att->get_type()))));
 552                         if(strpos($type,';'))
 553                                 $type = substr($type,0,strpos($type,';'));
 554                         if((! $link) || (strpos($link,'http') !== 0))
 555                                 continue;
 556
 557                         if(! $title)
 558                                 $title = ' ';
 559                         if(! $type)
 560                                 $type = 'application/octet-stream';
 561
 562                         $att_arr[] = '[attach]href="' . $link . '" length="' . $len . '" type="' . $type . '" title="' . $title . '"[/attach]';
 563                 }
 564                 $res['attach'] = implode(',', $att_arr);
 565         }
 566
 567         $rawobj = $item->get_item_tags(NAMESPACE_ACTIVITY, 'object');
 568
 569         if($rawobj) {
 570                 $res['object'] = '<object>' . "\n";
 571                 if($rawobj[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data']) {
 572                         $res['object-type'] = $rawobj[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data'];
 573                         $res['object'] .= '<type>' . $rawobj[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data'] . '</type>' . "\n";
 574                 }
 575                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['id'][0]['data'])
 576                         $res['object'] .= '<id>' . $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['id'][0]['data'] . '</id>' . "\n";
 577                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'])
 578                         $res['object'] .= '<link>' . encode_rel_links($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link']) . '</link>' . "\n";
 579                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['title'][0]['data'])
 580                         $res['object'] .= '<title>' . $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['title'][0]['data'] . '</title>' . "\n";
 581                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['content'][0]['data']) {
 582                         $body = $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['content'][0]['data'];
 583                         if(! $body)
 584                                 $body = $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['summary'][0]['data'];
 585                         // preserve a copy of the original body content in case we later need to parse out any microformat information, e.g. events
 586                         $res['object'] .= '<orig>' . xmlify($body) . '</orig>' . "\n";
 587                         if((strpos($body,'<') !== false) || (strpos($body,'>') !== false)) {
 588
 589                                 $body = preg_replace('#<object[^>]+>.+?' . 'http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s',
 590                                         '[youtube]$1[/youtube]', $body);
 591
 592                 $res['body'] = preg_replace('#<iframe[^>].+?' . 'http://www.youtube.com/embed/([A-Za-z0-9\-_=]+).+?</iframe>#s',
 593                         '[youtube]$1[/youtube]', $res['body']);
 594
 595
 596                                 $config = HTMLPurifier_Config::createDefault();
 597                                 $config->set('Cache.DefinitionImpl', null);
 598
 599                                 $purifier = new HTMLPurifier($config);
 600                                 $body = $purifier->purify($body);
 601                                 $body = html2bbcode($body);
 602                         }
 603
 604                         $res['object'] .= '<content>' . $body . '</content>' . "\n";
 605                 }
 606
 607                 $res['object'] .= '</object>' . "\n";
 608         }
 609
 610         $rawobj = $item->get_item_tags(NAMESPACE_ACTIVITY, 'target');
 611
 612         if($rawobj) {
 613                 $res['target'] = '<target>' . "\n";
 614                 if($rawobj[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data']) {
 615                         $res['target'] .= '<type>' . $rawobj[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data'] . '</type>' . "\n";
 616                 }
 617                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['id'][0]['data'])
 618                         $res['target'] .= '<id>' . $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['id'][0]['data'] . '</id>' . "\n";
 619
 620                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'])
 621                         $res['target'] .= '<link>' . encode_rel_links($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link']) . '</link>' . "\n";
 622                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['title'][0]['data'])
 623                         $res['target'] .= '<title>' . $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['title'][0]['data'] . '</title>' . "\n";
 624                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['content'][0]['data']) {
 625                         $body = $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['content'][0]['data'];
 626                         if(! $body)
 627                                 $body = $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['summary'][0]['data'];
 628                         // preserve a copy of the original body content in case we later need to parse out any microformat information, e.g. events
 629                         $res['object'] .= '<orig>' . xmlify($body) . '</orig>' . "\n";
 630                         if((strpos($body,'<') !== false) || (strpos($body,'>') !== false)) {
 631
 632                                 $body = preg_replace('#<object[^>]+>.+?' . 'http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s',
 633                                         '[youtube]$1[/youtube]', $body);
 634
 635                 $res['body'] = preg_replace('#<iframe[^>].+?' . 'http://www.youtube.com/embed/([A-Za-z0-9\-_=]+).+?</iframe>#s',
 636                         '[youtube]$1[/youtube]', $res['body']);
 637
 638                                 $config = HTMLPurifier_Config::createDefault();
 639                                 $config->set('Cache.DefinitionImpl', null);
 640
 641                                 $purifier = new HTMLPurifier($config);
 642                                 $body = $purifier->purify($body);
 643                                 $body = html2bbcode($body);
 644                         }
 645
 646                         $res['target'] .= '<content>' . $body . '</content>' . "\n";
 647                 }
 648
 649                 $res['target'] .= '</target>' . "\n";
 650         }
 651
 652         $arr = array('feed' => $feed, 'item' => $item, 'result' => $res);
 653
 654         call_hooks('parse_atom', $arr);
 655
 656         return $res;
 657 }
 658
 659 function encode_rel_links($links) {
 660         $o = '';
 661         if(! ((is_array($links)) && (count($links))))
 662                 return $o;
 663         foreach($links as $link) {
 664                 $o .= '<link ';
 665                 if($link['attribs']['']['rel'])
 666                         $o .= 'rel="' . $link['attribs']['']['rel'] . '" ';
 667                 if($link['attribs']['']['type'])
 668                         $o .= 'type="' . $link['attribs']['']['type'] . '" ';
 669                 if($link['attribs']['']['href'])
 670                         $o .= 'href="' . $link['attribs']['']['href'] . '" ';
 671                 if( (x($link['attribs'],NAMESPACE_MEDIA)) && $link['attribs'][NAMESPACE_MEDIA]['width'])
 672                         $o .= 'media:width="' . $link['attribs'][NAMESPACE_MEDIA]['width'] . '" ';
 673                 if( (x($link['attribs'],NAMESPACE_MEDIA)) && $link['attribs'][NAMESPACE_MEDIA]['height'])
 674                         $o .= 'media:height="' . $link['attribs'][NAMESPACE_MEDIA]['height'] . '" ';
 675                 $o .= ' />' . "\n" ;
 676         }
 677         return xmlify($o);
 678 }
 679
 680 function item_store($arr,$force_parent = false) {
 681
 682         // If a Diaspora signature structure was passed in, pull it out of the
 683         // item array and set it aside for later storage.
 684
 685         $dsprsig = null;
 686         if(x($arr,'dsprsig')) {
 687                 $dsprsig = json_decode(base64_decode($arr['dsprsig']));
 688                 unset($arr['dsprsig']);
 689         }
 690
 691         if($arr['gravity'])
 692                 $arr['gravity'] = intval($arr['gravity']);
 693         elseif($arr['parent-uri'] == $arr['uri'])
 694                 $arr['gravity'] = 0;
 695         elseif(activity_match($arr['verb'],ACTIVITY_POST))
 696                 $arr['gravity'] = 6;
 697         else
 698                 $arr['gravity'] = 6;   // extensible catchall
 699
 700         if(! x($arr,'type'))
 701                 $arr['type']      = 'remote';
 702
 703         // Shouldn't happen but we want to make absolutely sure it doesn't leak from a plugin.
 704
 705         if((strpos($arr['body'],'<') !== false) || (strpos($arr['body'],'>') !== false))
 706                 $arr['body'] = strip_tags($arr['body']);
 707
 708
 709         $arr['wall']          = ((x($arr,'wall'))          ? intval($arr['wall'])                : 0);
 710         $arr['uri']           = ((x($arr,'uri'))           ? notags(trim($arr['uri']))           : random_string());
 711         $arr['extid']         = ((x($arr,'extid'))         ? notags(trim($arr['extid']))         : '');
 712         $arr['author-name']   = ((x($arr,'author-name'))   ? notags(trim($arr['author-name']))   : '');
 713         $arr['author-link']   = ((x($arr,'author-link'))   ? notags(trim($arr['author-link']))   : '');
 714         $arr['author-avatar'] = ((x($arr,'author-avatar')) ? notags(trim($arr['author-avatar'])) : '');
 715         $arr['owner-name']    = ((x($arr,'owner-name'))    ? notags(trim($arr['owner-name']))    : '');
 716         $arr['owner-link']    = ((x($arr,'owner-link'))    ? notags(trim($arr['owner-link']))    : '');
 717         $arr['owner-avatar']  = ((x($arr,'owner-avatar'))  ? notags(trim($arr['owner-avatar']))  : '');
 718         $arr['created']       = ((x($arr,'created') !== false) ? datetime_convert('UTC','UTC',$arr['created']) : datetime_convert());
 719         $arr['edited']        = ((x($arr,'edited')  !== false) ? datetime_convert('UTC','UTC',$arr['edited'])  : datetime_convert());
 720         $arr['received']      = datetime_convert();
 721         $arr['changed']       = datetime_convert();
 722         $arr['title']         = ((x($arr,'title'))         ? notags(trim($arr['title']))         : '');
 723         $arr['location']      = ((x($arr,'location'))      ? notags(trim($arr['location']))      : '');
 724         $arr['coord']         = ((x($arr,'coord'))         ? notags(trim($arr['coord']))         : '');
 725         $arr['last-child']    = ((x($arr,'last-child'))    ? intval($arr['last-child'])          : 0 );
 726         $arr['visible']       = ((x($arr,'visible') !== false) ? intval($arr['visible'])         : 1 );
 727         $arr['deleted']       = 0;
 728         $arr['parent-uri']    = ((x($arr,'parent-uri'))    ? notags(trim($arr['parent-uri']))    : '');
 729         $arr['verb']          = ((x($arr,'verb'))          ? notags(trim($arr['verb']))          : '');
 730         $arr['object-type']   = ((x($arr,'object-type'))   ? notags(trim($arr['object-type']))   : '');
 731         $arr['object']        = ((x($arr,'object'))        ? trim($arr['object'])                : '');
 732         $arr['target-type']   = ((x($arr,'target-type'))   ? notags(trim($arr['target-type']))   : '');
 733         $arr['target']        = ((x($arr,'target'))        ? trim($arr['target'])                : '');
 734         $arr['plink']         = ((x($arr,'plink'))         ? notags(trim($arr['plink']))         : '');
 735         $arr['allow_cid']     = ((x($arr,'allow_cid'))     ? trim($arr['allow_cid'])             : '');
 736         $arr['allow_gid']     = ((x($arr,'allow_gid'))     ? trim($arr['allow_gid'])             : '');
 737         $arr['deny_cid']      = ((x($arr,'deny_cid'))      ? trim($arr['deny_cid'])              : '');
 738         $arr['deny_gid']      = ((x($arr,'deny_gid'))      ? trim($arr['deny_gid'])              : '');
 739         $arr['private']       = ((x($arr,'private'))       ? intval($arr['private'])             : 0 );
 740         $arr['bookmark']      = ((x($arr,'bookmark'))      ? intval($arr['bookmark'])            : 0 );
 741         $arr['body']          = ((x($arr,'body'))          ? trim($arr['body'])                  : '');
 742         $arr['tag']           = ((x($arr,'tag'))           ? notags(trim($arr['tag']))           : '');
 743         $arr['attach']        = ((x($arr,'attach'))        ? notags(trim($arr['attach']))        : '');
 744         $arr['app']           = ((x($arr,'app'))           ? notags(trim($arr['app']))           : '');
 745         $arr['guid']          = ((x($arr,'guid'))          ? notags(trim($arr['guid']))          : get_guid());
 746
 747         if($arr['parent-uri'] === $arr['uri']) {
 748                 $parent_id = 0;
 749                 $allow_cid = $arr['allow_cid'];
 750                 $allow_gid = $arr['allow_gid'];
 751                 $deny_cid  = $arr['deny_cid'];
 752                 $deny_gid  = $arr['deny_gid'];
 753         }
 754         else {
 755
 756                 // find the parent and snarf the item id and ACL's
 757                 // and anything else we need to inherit
 758
 759                 $r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 760                         dbesc($arr['parent-uri']),
 761                         intval($arr['uid'])
 762                 );
 763
 764                 if(count($r)) {
 765
 766                         // is the new message multi-level threaded?
 767                         // even though we don't support it now, preserve the info
 768                         // and re-attach to the conversation parent.
 769
 770                         if($r[0]['uri'] != $r[0]['parent-uri']) {
 771                                 $arr['thr-parent'] = $arr['parent-uri'];
 772                                 $arr['parent-uri'] = $r[0]['parent-uri'];
 773                                 $z = q("SELECT `id` FROM `item` WHERE `uri` = '%s' AND `parent-uri` = '%s' AND `uid` = %d LIMIT 1",
 774                                         dbesc($r[0]['parent-uri']),
 775                                         dbesc($r[0]['parent-uri']),
 776                                         intval($arr['uid'])
 777                                 );
 778                                 if($z && count($z))
 779                                         $r = $z;
 780                         }
 781
 782                         $parent_id      = $r[0]['id'];
 783                         $parent_deleted = $r[0]['deleted'];
 784                         $allow_cid      = $r[0]['allow_cid'];
 785                         $allow_gid      = $r[0]['allow_gid'];
 786                         $deny_cid       = $r[0]['deny_cid'];
 787                         $deny_gid       = $r[0]['deny_gid'];
 788                         $arr['wall']    = $r[0]['wall'];
 789                 }
 790                 else {
 791
 792                         // Allow one to see reply tweets from status.net even when
 793                         // we don't have or can't see the original post.
 794
 795                         if($force_parent) {
 796                                 logger('item_store: $force_parent=true, reply converted to top-level post.');
 797                                 $parent_id = 0;
 798                                 $arr['thr-parent'] = $arr['parent-uri'];
 799                                 $arr['parent-uri'] = $arr['uri'];
 800                                 $arr['gravity'] = 0;
 801                         }
 802                         else {
 803                                 logger('item_store: item parent was not found - ignoring item');
 804                                 return 0;
 805                         }
 806                 }
 807         }
 808
 809
 810         call_hooks('post_remote',$arr);
 811
 812         dbesc_array($arr);
 813
 814         logger('item_store: ' . print_r($arr,true), LOGGER_DATA);
 815
 816         $r = dbq("INSERT INTO `item` (`"
 817                         . implode("`, `", array_keys($arr))
 818                         . "`) VALUES ('"
 819                         . implode("', '", array_values($arr))
 820                         . "')" );
 821
 822         // find the item we just created
 823
 824         $r = q("SELECT `id` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 825                 $arr['uri'],           // already dbesc'd
 826                 intval($arr['uid'])
 827         );
 828         if(! count($r)) {
 829                 // This is not good, but perhaps we encountered a rare race/cache condition, so back off and try again.
 830                 sleep(3);
 831                 $r = q("SELECT `id` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 832                         $arr['uri'],           // already dbesc'd
 833                         intval($arr['uid'])
 834                 );
 835         }
 836
 837         if(count($r)) {
 838                 $current_post = $r[0]['id'];
 839                 logger('item_store: created item ' . $current_post);
 840         }
 841         else {
 842                 logger('item_store: could not locate created item');
 843                 return 0;
 844         }
 845
 846         if((! $parent_id) || ($arr['parent-uri'] === $arr['uri']))
 847                 $parent_id = $current_post;
 848
 849         if(strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid))
 850                 $private = 1;
 851         else
 852                 $private = $arr['private'];
 853
 854         // Set parent id - and also make sure to inherit the parent's ACL's.
 855
 856         $r = q("UPDATE `item` SET `parent` = %d, `allow_cid` = '%s', `allow_gid` = '%s',
 857                 `deny_cid` = '%s', `deny_gid` = '%s', `private` = %d, `deleted` = %d WHERE `id` = %d LIMIT 1",
 858                 intval($parent_id),
 859                 dbesc($allow_cid),
 860                 dbesc($allow_gid),
 861                 dbesc($deny_cid),
 862                 dbesc($deny_gid),
 863                 intval($private),
 864                 intval($parent_deleted),
 865                 intval($current_post)
 866         );
 867
 868         if($dsprsig) {
 869                 q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
 870                         intval($current_post),
 871                         dbesc($dsprsig->signed_text),
 872                         dbesc($dsprsig->signature),
 873                         dbesc($dsprsig->signer)
 874                 );
 875         }
 876
 877
 878         /**
 879          * If this is now the last-child, force all _other_ children of this parent to *not* be last-child
 880          */
 881
 882         if($arr['last-child']) {
 883                 $r = q("UPDATE `item` SET `last-child` = 0 WHERE `parent-uri` = '%s' AND `uid` = %d AND `id` != %d",
 884                         dbesc($arr['uri']),
 885                         intval($arr['uid']),
 886                         intval($current_post)
 887                 );
 888         }
 889
 890         return $current_post;
 891 }
 892
 893 function get_item_contact($item,$contacts) {
 894         if(! count($contacts) || (! is_array($item)))
 895                 return false;
 896         foreach($contacts as $contact) {
 897                 if($contact['id'] == $item['contact-id']) {
 898                         return $contact;
 899                         break; // NOTREACHED
 900                 }
 901         }
 902         return false;
 903 }
 904
 905
 906 function dfrn_deliver($owner,$contact,$atom, $dissolve = false) {
 907
 908         $a = get_app();
 909
 910         if((! strlen($contact['issued-id'])) && (! $contact['duplex']) && (! ($owner['page-flags'] == PAGE_COMMUNITY)))
 911                 return 3;
 912
 913         $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
 914
 915         if($contact['duplex'] && $contact['dfrn-id'])
 916                 $idtosend = '0:' . $orig_id;
 917         if($contact['duplex'] && $contact['issued-id'])
 918                 $idtosend = '1:' . $orig_id;
 919
 920         $rino = ((function_exists('mcrypt_encrypt')) ? 1 : 0);
 921
 922         $rino_enable = get_config('system','rino_encrypt');
 923
 924         if(! $rino_enable)
 925                 $rino = 0;
 926
 927         $url = $contact['notify'] . '&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino=1' : '');
 928
 929         logger('dfrn_deliver: ' . $url);
 930
 931         $xml = fetch_url($url);
 932
 933         $curl_stat = $a->get_curl_code();
 934         if(! $curl_stat)
 935                 return(-1); // timed out
 936
 937         logger('dfrn_deliver: ' . $xml, LOGGER_DATA);
 938
 939         if(! $xml)
 940                 return 3;
 941
 942         if(strpos($xml,'<?xml') === false) {
 943                 logger('dfrn_deliver: no valid XML returned');
 944                 logger('dfrn_deliver: returned XML: ' . $xml, LOGGER_DATA);
 945                 return 3;
 946         }
 947
 948         $res = parse_xml_string($xml);
 949
 950         if((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id)))
 951                 return (($res->status) ? $res->status : 3);
 952
 953         $postvars     = array();
 954         $sent_dfrn_id = hex2bin((string) $res->dfrn_id);
 955         $challenge    = hex2bin((string) $res->challenge);
 956         $dfrn_version = (float) (($res->dfrn_version) ? $res->dfrn_version : 2.0);
 957         $rino_allowed = ((intval($res->rino) === 1) ? 1 : 0);
 958
 959         $final_dfrn_id = '';
 960
 961
 962         if(($contact['duplex'] && strlen($contact['pubkey'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
 963                 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 964                 openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
 965         }
 966         else {
 967                 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 968                 openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
 969         }
 970
 971         $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 972
 973         if(strpos($final_dfrn_id,':') == 1)
 974                 $final_dfrn_id = substr($final_dfrn_id,2);
 975
 976         if($final_dfrn_id != $orig_id) {
 977                 logger('dfrn_deliver: wrong dfrn_id.');
 978                 // did not decode properly - cannot trust this site
 979                 return 3;
 980         }
 981
 982         $postvars['dfrn_id']      = $idtosend;
 983         $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
 984         if($dissolve)
 985                 $postvars['dissolve'] = '1';
 986
 987
 988         if((($contact['rel']) && ($contact['rel'] != CONTACT_IS_SHARING) && (! $contact['blocked'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
 989                 $postvars['data'] = $atom;
 990                 $postvars['perm'] = 'rw';
 991         }
 992         else {
 993                 $postvars['data'] = str_replace('<dfrn:comment-allow>1','<dfrn:comment-allow>0',$atom);
 994                 $postvars['perm'] = 'r';
 995         }
 996
 997         if($rino && $rino_allowed && (! $dissolve)) {
 998                 $key = substr(random_string(),0,16);
 999                 $data = bin2hex(aes_encrypt($postvars['data'],$key));
1000                 $postvars['data'] = $data;
1001                 logger('rino: sent key = ' . $key, LOGGER_DEBUG);
1002
1003
1004                 if($dfrn_version >= 2.1) {
1005                         if(($contact['duplex'] && strlen($contact['pubkey'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
1006                                 openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
1007                         }
1008                         else {
1009                                 openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
1010                         }
1011                 }
1012                 else {
1013                         if(($contact['duplex'] && strlen($contact['prvkey'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
1014                                 openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
1015                         }
1016                         else {
1017                                 openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
1018                         }
1019                 }
1020
1021                 logger('md5 rawkey ' . md5($postvars['key']));
1022
1023                 $postvars['key'] = bin2hex($postvars['key']);
1024         }
1025
1026         logger('dfrn_deliver: ' . "SENDING: " . print_r($postvars,true), LOGGER_DATA);
1027
1028         $xml = post_url($contact['notify'],$postvars);
1029
1030         logger('dfrn_deliver: ' . "RECEIVED: " . $xml, LOGGER_DATA);
1031
1032         $curl_stat = $a->get_curl_code();
1033         if((! $curl_stat) || (! strlen($xml)))
1034                 return(-1); // timed out
1035
1036         if(strpos($xml,'<?xml') === false) {
1037                 logger('dfrn_deliver: phase 2: no valid XML returned');
1038                 logger('dfrn_deliver: phase 2: returned XML: ' . $xml, LOGGER_DATA);
1039                 return 3;
1040         }
1041
1042         $res = parse_xml_string($xml);
1043
1044         return $res->status;
1045 }
1046
1047
1048 /**
1049  *
1050  * consume_feed - process atom feed and update anything/everything we might need to update
1051  *
1052  * $xml = the (atom) feed to consume - RSS isn't as fully supported but may work for simple feeds.
1053  *
1054  * $importer = the contact_record (joined to user_record) of the local user who owns this relationship.
1055  *             It is this person's stuff that is going to be updated.
1056  * $contact =  the person who is sending us stuff. If not set, we MAY be processing a "follow" activity
1057  *             from an external network and MAY create an appropriate contact record. Otherwise, we MUST
1058  *             have a contact record.
1059  * $hub = should we find a hub declation in the feed, pass it back to our calling process, who might (or
1060  *        might not) try and subscribe to it.
1061  *
1062  */
1063
1064 function consume_feed($xml,$importer,&$contact, &$hub, $datedir = 0, $secure_feed = false) {
1065
1066         require_once('library/simplepie/simplepie.inc');
1067
1068         if(! strlen($xml)) {
1069                 logger('consume_feed: empty input');
1070                 return;
1071         }
1072
1073         $feed = new SimplePie();
1074         $feed->set_raw_data($xml);
1075         if($datedir)
1076                 $feed->enable_order_by_date(true);
1077         else
1078                 $feed->enable_order_by_date(false);
1079         $feed->init();
1080
1081         if($feed->error())
1082                 logger('consume_feed: Error parsing XML: ' . $feed->error());
1083
1084         $permalink = $feed->get_permalink();
1085
1086         // Check at the feed level for updated contact name and/or photo
1087
1088         $name_updated  = '';
1089         $new_name = '';
1090         $photo_timestamp = '';
1091         $photo_url = '';
1092         $birthday = '';
1093
1094         $hubs = $feed->get_links('hub');
1095
1096         if(count($hubs))
1097                 $hub = implode(',', $hubs);
1098
1099         $rawtags = $feed->get_feed_tags( NAMESPACE_DFRN, 'owner');
1100         if(! $rawtags)
1101                 $rawtags = $feed->get_feed_tags( SIMPLEPIE_NAMESPACE_ATOM_10, 'author');
1102         if($rawtags) {
1103                 $elems = $rawtags[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10];
1104                 if($elems['name'][0]['attribs'][NAMESPACE_DFRN]['updated']) {
1105                         $name_updated = $elems['name'][0]['attribs'][NAMESPACE_DFRN]['updated'];
1106                         $new_name = $elems['name'][0]['data'];
1107                 }
1108                 if((x($elems,'link')) && ($elems['link'][0]['attribs']['']['rel'] === 'photo') && ($elems['link'][0]['attribs'][NAMESPACE_DFRN]['updated'])) {
1109                         $photo_timestamp = datetime_convert('UTC','UTC',$elems['link'][0]['attribs'][NAMESPACE_DFRN]['updated']);
1110                         $photo_url = $elems['link'][0]['attribs']['']['href'];
1111                 }
1112
1113                 if((x($rawtags[0]['child'], NAMESPACE_DFRN)) && (x($rawtags[0]['child'][NAMESPACE_DFRN],'birthday'))) {
1114                         $birthday = datetime_convert('UTC','UTC', $rawtags[0]['child'][NAMESPACE_DFRN]['birthday'][0]['data']);
1115                 }
1116         }
1117
1118         if((is_array($contact)) && ($photo_timestamp) && (strlen($photo_url)) && ($photo_timestamp > $contact['avatar-date'])) {
1119                 logger('consume_feed: Updating photo for ' . $contact['name']);
1120                 require_once("Photo.php");
1121                 $photo_failure = false;
1122                 $have_photo = false;
1123
1124                 $r = q("SELECT `resource-id` FROM `photo` WHERE `contact-id` = %d AND `uid` = %d LIMIT 1",
1125                         intval($contact['id']),
1126                         intval($contact['uid'])
1127                 );
1128                 if(count($r)) {
1129                         $resource_id = $r[0]['resource-id'];
1130                         $have_photo = true;
1131                 }
1132                 else {
1133                         $resource_id = photo_new_resource();
1134                 }
1135
1136                 $img_str = fetch_url($photo_url,true);
1137                 $img = new Photo($img_str);
1138                 if($img->is_valid()) {
1139                         if($have_photo) {
1140                                 q("DELETE FROM `photo` WHERE `resource-id` = '%s' AND `contact-id` = %d AND `uid` = %d",
1141                                         dbesc($resource_id),
1142                                         intval($contact['id']),
1143                                         intval($contact['uid'])
1144                                 );
1145                         }
1146
1147                         $img->scaleImageSquare(175);
1148
1149                         $hash = $resource_id;
1150                         $r = $img->store($contact['uid'], $contact['id'], $hash, basename($photo_url), 'Contact Photos', 4);
1151
1152                         $img->scaleImage(80);
1153                         $r = $img->store($contact['uid'], $contact['id'], $hash, basename($photo_url), 'Contact Photos', 5);
1154
1155                         $img->scaleImage(48);
1156                         $r = $img->store($contact['uid'], $contact['id'], $hash, basename($photo_url), 'Contact Photos', 6);
1157
1158                         $a = get_app();
1159
1160                         q("UPDATE `contact` SET `avatar-date` = '%s', `photo` = '%s', `thumb` = '%s', `micro` = '%s'
1161                                 WHERE `uid` = %d AND `id` = %d LIMIT 1",
1162                                 dbesc(datetime_convert()),
1163                                 dbesc($a->get_baseurl() . '/photo/' . $hash . '-4.jpg'),
1164                                 dbesc($a->get_baseurl() . '/photo/' . $hash . '-5.jpg'),
1165                                 dbesc($a->get_baseurl() . '/photo/' . $hash . '-6.jpg'),
1166                                 intval($contact['uid']),
1167                                 intval($contact['id'])
1168                         );
1169                 }
1170         }
1171
1172         if((is_array($contact)) && ($name_updated) && (strlen($new_name)) && ($name_updated > $contact['name-date'])) {
1173                 q("UPDATE `contact` SET `name` = '%s', `name-date` = '%s' WHERE `uid` = %d AND `id` = %d LIMIT 1",
1174                         dbesc(notags(trim($new_name))),
1175                         dbesc(datetime_convert()),
1176                         intval($contact['uid']),
1177                         intval($contact['id'])
1178                 );
1179         }
1180
1181         if(strlen($birthday)) {
1182                 if(substr($birthday,0,4) != $contact['bdyear']) {
1183                         logger('consume_feed: updating birthday: ' . $birthday);
1184
1185                         /**
1186                          *
1187                          * Add new birthday event for this person
1188                          *
1189                          * $bdtext is just a readable placeholder in case the event is shared
1190                          * with others. We will replace it during presentation to our $importer
1191                          * to contain a sparkle link and perhaps a photo.
1192                          *
1193                          */
1194
1195                         $bdtext = t('Birthday:') . ' [url=' . $contact['url'] . ']' . $contact['name'] . '[/url]' ;
1196
1197
1198                         $r = q("INSERT INTO `event` (`uid`,`cid`,`created`,`edited`,`start`,`finish`,`desc`,`type`)
1199                                 VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s' ) ",
1200                                 intval($contact['uid']),
1201                                 intval($contact['id']),
1202                                 dbesc(datetime_convert()),
1203                                 dbesc(datetime_convert()),
1204                                 dbesc(datetime_convert('UTC','UTC', $birthday)),
1205                                 dbesc(datetime_convert('UTC','UTC', $birthday . ' + 1 day ')),
1206                                 dbesc($bdtext),
1207                                 dbesc('birthday')
1208                         );
1209
1210
1211                         // update bdyear
1212
1213                         q("UPDATE `contact` SET `bdyear` = '%s' WHERE `uid` = %d AND `id` = %d LIMIT 1",
1214                                 dbesc(substr($birthday,0,4)),
1215                                 intval($contact['uid']),
1216                                 intval($contact['id'])
1217                         );
1218
1219                         // This function is called twice without reloading the contact
1220                         // Make sure we only create one event. This is why &$contact
1221                         // is a reference var in this function
1222
1223                         $contact['bdyear'] = substr($birthday,0,4);
1224                 }
1225
1226         }
1227
1228
1229         // process any deleted entries
1230
1231         $del_entries = $feed->get_feed_tags(NAMESPACE_TOMB, 'deleted-entry');
1232         if(is_array($del_entries) && count($del_entries)) {
1233                 foreach($del_entries as $dentry) {
1234                         $deleted = false;
1235                         if(isset($dentry['attribs']['']['ref'])) {
1236                                 $uri = $dentry['attribs']['']['ref'];
1237                                 $deleted = true;
1238                                 if(isset($dentry['attribs']['']['when'])) {
1239                                         $when = $dentry['attribs']['']['when'];
1240                                         $when = datetime_convert('UTC','UTC', $when, 'Y-m-d H:i:s');
1241                                 }
1242                                 else
1243                                         $when = datetime_convert('UTC','UTC','now','Y-m-d H:i:s');
1244                         }
1245                         if($deleted && is_array($contact)) {
1246                                 $r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d AND `contact-id` = %d LIMIT 1",
1247                                         dbesc($uri),
1248                                         intval($importer['uid']),
1249                                         intval($contact['id'])
1250                                 );
1251                                 if(count($r)) {
1252                                         $item = $r[0];
1253
1254                                         if(! $item['deleted'])
1255                                                 logger('consume_feed: deleting item ' . $item['id'] . ' uri=' . $item['uri'], LOGGER_DEBUG);
1256
1257                                         if($item['uri'] == $item['parent-uri']) {
1258                                                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
1259                                                         `body` = '', `title` = ''
1260                                                         WHERE `parent-uri` = '%s' AND `uid` = %d",
1261                                                         dbesc($when),
1262                                                         dbesc(datetime_convert()),
1263                                                         dbesc($item['uri']),
1264                                                         intval($importer['uid'])
1265                                                 );
1266                                         }
1267                                         else {
1268                                                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
1269                                                         `body` = '', `title` = ''
1270                                                         WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
1271                                                         dbesc($when),
1272                                                         dbesc(datetime_convert()),
1273                                                         dbesc($uri),
1274                                                         intval($importer['uid'])
1275                                                 );
1276                                                 if($item['last-child']) {
1277                                                         // ensure that last-child is set in case the comment that had it just got wiped.
1278                                                         q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d ",
1279                                                                 dbesc(datetime_convert()),
1280                                                                 dbesc($item['parent-uri']),
1281                                                                 intval($item['uid'])
1282                                                         );
1283                                                         // who is the last child now?
1284                                                         $r = q("SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `uid` = %d
1285                                                                 ORDER BY `created` DESC LIMIT 1",
1286                                                                         dbesc($item['parent-uri']),
1287                                                                         intval($importer['uid'])
1288                                                         );
1289                                                         if(count($r)) {
1290                                                                 q("UPDATE `item` SET `last-child` = 1 WHERE `id` = %d LIMIT 1",
1291                                                                         intval($r[0]['id'])
1292                                                                 );
1293                                                         }
1294                                                 }
1295                                         }
1296                                 }
1297                         }
1298                 }
1299         }
1300
1301         // Now process the feed
1302
1303         if($feed->get_item_quantity()) {
1304
1305                 logger('consume_feed: feed item count = ' . $feed->get_item_quantity());
1306
1307         // in inverse date order
1308                 if ($datedir)
1309                         $items = array_reverse($feed->get_items());
1310                 else
1311                         $items = $feed->get_items();
1312
1313
1314                 foreach($items as $item) {
1315
1316                         $is_reply = false;
1317                         $item_id = $item->get_id();
1318                         $rawthread = $item->get_item_tags( NAMESPACE_THREAD,'in-reply-to');
1319                         if(isset($rawthread[0]['attribs']['']['ref'])) {
1320                                 $is_reply = true;
1321                                 $parent_uri = $rawthread[0]['attribs']['']['ref'];
1322                         }
1323
1324                         if(($is_reply) && is_array($contact)) {
1325
1326                                 // Have we seen it? If not, import it.
1327
1328                                 $item_id  = $item->get_id();
1329                                 $datarray = get_atom_elements($feed,$item);
1330
1331                                 if(! x($datarray,'author-name'))
1332                                         $datarray['author-name'] = $contact['name'];
1333                                 if(! x($datarray,'author-link'))
1334                                         $datarray['author-link'] = $contact['url'];
1335                                 if(! x($datarray,'author-avatar'))
1336                                         $datarray['author-avatar'] = $contact['thumb'];
1337
1338
1339                                 $r = q("SELECT `uid`, `last-child`, `edited`, `body` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
1340                                         dbesc($item_id),
1341                                         intval($importer['uid'])
1342                                 );
1343
1344                                 // Update content if 'updated' changes
1345
1346                                 if(count($r)) {
1347                                         if((x($datarray,'edited') !== false) && (datetime_convert('UTC','UTC',$datarray['edited']) !== $r[0]['edited'])) {
1348                                                 $r = q("UPDATE `item` SET `body` = '%s', `edited` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
1349                                                         dbesc($datarray['body']),
1350                                                         dbesc(datetime_convert('UTC','UTC',$datarray['edited'])),
1351                                                         dbesc($item_id),
1352                                                         intval($importer['uid'])
1353                                                 );
1354                                         }
1355
1356                                         // update last-child if it changes
1357
1358                                         $allow = $item->get_item_tags( NAMESPACE_DFRN, 'comment-allow');
1359                                         if(($allow) && ($allow[0]['data'] != $r[0]['last-child'])) {
1360                                                 $r = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d",
1361                                                         dbesc(datetime_convert()),
1362                                                         dbesc($parent_uri),
1363                                                         intval($importer['uid'])
1364                                                 );
1365                                                 $r = q("UPDATE `item` SET `last-child` = %d , `changed` = '%s'  WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
1366                                                         intval($allow[0]['data']),
1367                                                         dbesc(datetime_convert()),
1368                                                         dbesc($item_id),
1369                                                         intval($importer['uid'])
1370                                                 );
1371                                         }
1372                                         continue;
1373                                 }
1374
1375                                 $force_parent = false;
1376                                 if($contact['network'] === 'stat') {
1377                                         $force_parent = true;
1378                                         if(strlen($datarray['title']))
1379                                                 unset($datarray['title']);
1380                                         $r = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d",
1381                                                 dbesc(datetime_convert()),
1382                                                 dbesc($parent_uri),
1383                                                 intval($importer['uid'])
1384                                         );
1385                                         $datarray['last-child'] = 1;
1386                                 }
1387
1388                                 if(($contact['network'] === 'feed') || (! strlen($contact['notify']))) {
1389                                         // one way feed - no remote comment ability
1390                                         $datarray['last-child'] = 0;
1391                                 }
1392                                 $datarray['parent-uri'] = $parent_uri;
1393                                 $datarray['uid'] = $importer['uid'];
1394                                 $datarray['contact-id'] = $contact['id'];
1395                                 if((activity_match($datarray['verb'],ACTIVITY_LIKE)) || (activity_match($datarray['verb'],ACTIVITY_DISLIKE))) {
1396                                         $datarray['type'] = 'activity';
1397                                         $datarray['gravity'] = GRAVITY_LIKE;
1398                                 }
1399
1400                                 $r = item_store($datarray,$force_parent);
1401                                 continue;
1402                         }
1403
1404                         else {
1405
1406                                 // Head post of a conversation. Have we seen it? If not, import it.
1407
1408                                 $item_id  = $item->get_id();
1409
1410                                 $datarray = get_atom_elements($feed,$item);
1411
1412                                 if(is_array($contact)) {
1413                                         if(! x($datarray,'author-name'))
1414                                                 $datarray['author-name'] = $contact['name'];
1415                                         if(! x($datarray,'author-link'))
1416                                                 $datarray['author-link'] = $contact['url'];
1417                                         if(! x($datarray,'author-avatar'))
1418                                                 $datarray['author-avatar'] = $contact['thumb'];
1419                                 }
1420
1421                                 if((x($datarray,'object-type')) && ($datarray['object-type'] === ACTIVITY_OBJ_EVENT)) {
1422                                         $ev = bbtoevent($datarray['body']);
1423                                         if(x($ev,'desc') && x($ev,'start')) {
1424                                                 $ev['uid'] = $importer['uid'];
1425                                                 $ev['uri'] = $item_id;
1426                                                 $ev['edited'] = $datarray['edited'];
1427                                                 $ev['private'] = $datarray['private'];
1428
1429                                                 if(is_array($contact))
1430                                                         $ev['cid'] = $contact['id'];
1431                                                 $r = q("SELECT * FROM `event` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
1432                                                         dbesc($item_id),
1433                                                         intval($importer['uid'])
1434                                                 );
1435                                                 if(count($r))
1436                                                         $ev['id'] = $r[0]['id'];
1437                                                 $xyz = event_store($ev);
1438                                                 continue;
1439                                         }
1440                                 }
1441
1442                                 $r = q("SELECT `uid`, `last-child`, `edited`, `body` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
1443                                         dbesc($item_id),
1444                                         intval($importer['uid'])
1445                                 );
1446
1447                                 // Update content if 'updated' changes
1448
1449                                 if(count($r)) {
1450                                         if((x($datarray,'edited') !== false) && (datetime_convert('UTC','UTC',$datarray['edited']) !== $r[0]['edited'])) {
1451                                                 $r = q("UPDATE `item` SET `body` = '%s', `edited` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
1452                                                         dbesc($datarray['body']),
1453                                                         dbesc(datetime_convert('UTC','UTC',$datarray['edited'])),
1454                                                         dbesc($item_id),
1455                                                         intval($importer['uid'])
1456                                                 );
1457                                         }
1458
1459                                         // update last-child if it changes
1460
1461                                         $allow = $item->get_item_tags( NAMESPACE_DFRN, 'comment-allow');
1462                                         if($allow && $allow[0]['data'] != $r[0]['last-child']) {
1463                                                 $r = q("UPDATE `item` SET `last-child` = %d , `changed` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
1464                                                         intval($allow[0]['data']),
1465                                                         dbesc(datetime_convert()),
1466                                                         dbesc($item_id),
1467                                                         intval($importer['uid'])
1468                                                 );
1469                                         }
1470                                         continue;
1471                                 }
1472
1473                                 if(activity_match($datarray['verb'],ACTIVITY_FOLLOW)) {
1474                                         logger('consume-feed: New follower');
1475                                         new_follower($importer,$contact,$datarray,$item);
1476                                         return;
1477                                 }
1478                                 if(activity_match($datarray['verb'],ACTIVITY_UNFOLLOW))  {
1479                                         lose_follower($importer,$contact,$datarray,$item);
1480                                         return;
1481                                 }
1482                                 if(! is_array($contact))
1483                                         return;
1484
1485                                 if($contact['network'] === 'stat' || stristr($permalink,'twitter.com')) {
1486                                         if(strlen($datarray['title']))
1487                                                 unset($datarray['title']);
1488                                         $datarray['last-child'] = 1;
1489                                 }
1490
1491                                 if(($contact['network'] === 'feed') || (! strlen($contact['notify']))) {
1492                                         // one way feed - no remote comment ability
1493                                         $datarray['last-child'] = 0;
1494                                 }
1495
1496                                 // This is my contact on another system, but it's really me.
1497                                 // Turn this into a wall post.
1498
1499                                 if($contact['remote_self'])
1500                                         $datarray['wall'] = 1;
1501
1502                                 $datarray['parent-uri'] = $item_id;
1503                                 $datarray['uid'] = $importer['uid'];
1504                                 $datarray['contact-id'] = $contact['id'];
1505                                 $r = item_store($datarray);
1506                                 continue;
1507
1508                         }
1509                 }
1510         }
1511 }
1512
1513 function new_follower($importer,$contact,$datarray,$item) {
1514         $url = notags(trim($datarray['author-link']));
1515         $name = notags(trim($datarray['author-name']));
1516         $photo = notags(trim($datarray['author-avatar']));
1517
1518         $rawtag = $item->get_item_tags(NAMESPACE_ACTIVITY,'actor');
1519         if($rawtag && $rawtag[0]['child'][NAMESPACE_POCO]['preferredUsername'][0]['data'])
1520                 $nick = $rawtag[0]['child'][NAMESPACE_POCO]['preferredUsername'][0]['data'];
1521
1522         if(is_array($contact)) {
1523                 if($contact['network'] == 'stat' && $contact['rel'] == CONTACT_IS_SHARING) {
1524                         $r = q("UPDATE `contact` SET `rel` = %d WHERE `id` = %d AND `uid` = %d LIMIT 1",
1525                                 intval(CONTACT_IS_FRIEND),
1526                                 intval($contact['id']),
1527                                 intval($importer['uid'])
1528                         );
1529                 }
1530
1531                 // send email notification to owner?
1532         }
1533         else {
1534
1535                 // create contact record
1536
1537                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `name`, `nick`, `photo`, `network`, `rel`,
1538                         `blocked`, `readonly`, `pending`, `writable` )
1539                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 1, 1 ) ",
1540                         intval($importer['uid']),
1541                         dbesc(datetime_convert()),
1542                         dbesc($url),
1543                         dbesc($name),
1544                         dbesc($nick),
1545                         dbesc($photo),
1546                         dbesc('stat'),
1547                         intval(CONTACT_IS_FOLLOWER)
1548                 );
1549                 $r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `pending` = 1 AND `rel` = %d LIMIT 1",
1550                                 intval($importer['uid']),
1551                                 dbesc($url),
1552                                 intval(CONTACT_IS_FOLLOWER)
1553                 );
1554                 if(count($r))
1555                                 $contact_record = $r[0];
1556
1557                 // create notification
1558                 $hash = random_string();
1559
1560                 if(is_array($contact_record)) {
1561                         $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `hash`, `datetime`)
1562                                 VALUES ( %d, %d, 0, 0, '%s', '%s' )",
1563                                 intval($importer['uid']),
1564                                 intval($contact_record['id']),
1565                                 dbesc($hash),
1566                                 dbesc(datetime_convert())
1567                         );
1568                 }
1569                 $r = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
1570                         intval($importer['uid'])
1571                 );
1572                 $a = get_app();
1573                 if(count($r)) {
1574                         if(($r[0]['notify-flags'] & NOTIFY_INTRO) && ($r[0]['page-flags'] == PAGE_NORMAL)) {
1575                                 $email_tpl = get_intltext_template('follow_notify_eml.tpl');
1576                                 $email = replace_macros($email_tpl, array(
1577                                         '$requestor' => ((strlen($name)) ? $name : t('[Name Withheld]')),
1578                                         '$url' => $url,
1579                                         '$myname' => $r[0]['username'],
1580                                         '$siteurl' => $a->get_baseurl(),
1581                                         '$sitename' => $a->config['sitename']
1582                                 ));
1583                                 $res = mail($r[0]['email'],
1584                                         t("You have a new follower at ") . $a->config['sitename'],
1585                                         $email,
1586                                         'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n"
1587                                         . 'Content-type: text/plain; charset=UTF-8' . "\n"
1588                                         . 'Content-transfer-encoding: 8bit' );
1589
1590                         }
1591                 }
1592         }
1593 }
1594
1595 function lose_follower($importer,$contact,$datarray,$item) {
1596
1597         if(($contact['rel'] == CONTACT_IS_FRIEND) || ($contact['rel'] == CONTACT_IS_SHARING)) {
1598                 q("UPDATE `contact` SET `rel` = %d WHERE `id` = %d LIMIT 1",
1599                         intval(CONTACT_IS_SHARING),
1600                         intval($contact['id'])
1601                 );
1602         }
1603         else {
1604                 contact_remove($contact['id']);
1605         }
1606 }
1607
1608
1609 function subscribe_to_hub($url,$importer,$contact) {
1610
1611         if(is_array($importer)) {
1612                 $r = q("SELECT `nickname` FROM `user` WHERE `uid` = %d LIMIT 1",
1613                         intval($importer['uid'])
1614                 );
1615         }
1616         if((! count($r)) || $contact['network'] === NETWORK_DIASPORA)
1617                 return;
1618
1619         $push_url = get_config('system','url') . '/pubsub/' . $r[0]['nickname'] . '/' . $contact['id'];
1620
1621         // Use a single verify token, even if multiple hubs
1622
1623         $verify_token = ((strlen($contact['hub-verify'])) ? $contact['hub-verify'] : random_string());
1624
1625         $params= 'hub.mode=subscribe&hub.callback=' . urlencode($push_url) . '&hub.topic=' . urlencode($contact['poll']) . '&hub.verify=async&hub.verify_token=' . $verify_token;
1626
1627         logger('subscribe_to_hub: subscribing ' . $contact['name'] . ' to hub ' . $url . ' with verifier ' . $verify_token);
1628
1629         if(! strlen($contact['hub-verify'])) {
1630                 $r = q("UPDATE `contact` SET `hub-verify` = '%s' WHERE `id` = %d LIMIT 1",
1631                         dbesc($verify_token),
1632                         intval($contact['id'])
1633                 );
1634         }
1635
1636         post_url($url,$params);
1637         return;
1638
1639 }
1640
1641
1642 function atom_author($tag,$name,$uri,$h,$w,$photo) {
1643         $o = '';
1644         if(! $tag)
1645                 return $o;
1646         $name = xmlify($name);
1647         $uri = xmlify($uri);
1648         $h = intval($h);
1649         $w = intval($w);
1650         $photo = xmlify($photo);
1651
1652
1653         $o .= "<$tag>\r\n";
1654         $o .= "<name>$name</name>\r\n";
1655         $o .= "<uri>$uri</uri>\r\n";
1656         $o .= '<link rel="photo"  type="image/jpeg" media:width="' . $w . '" media:height="' . $h . '" href="' . $photo . '" />' . "\r\n";
1657         $o .= '<link rel="avatar" type="image/jpeg" media:width="' . $w . '" media:height="' . $h . '" href="' . $photo . '" />' . "\r\n";
1658
1659         call_hooks('atom_author', $o);
1660
1661         $o .= "</$tag>\r\n";
1662         return $o;
1663 }
1664
1665 function atom_entry($item,$type,$author,$owner,$comment = false) {
1666
1667         $a = get_app();
1668
1669         if($item['deleted'])
1670                 return '<at:deleted-entry ref="' . xmlify($item['uri']) . '" when="' . xmlify(datetime_convert('UTC','UTC',$item['edited'] . '+00:00',ATOM_TIME)) . '" />' . "\r\n";
1671
1672
1673         if($item['allow_cid'] || $item['allow_gid'] || $item['deny_cid'] || $item['deny_gid'])
1674                 $body = fix_private_photos($item['body'],$owner['uid']);
1675         else
1676                 $body = $item['body'];
1677
1678
1679         $o = "\r\n\r\n<entry>\r\n";
1680
1681         if(is_array($author))
1682                 $o .= atom_author('author',$author['name'],$author['url'],80,80,$author['thumb']);
1683         else
1684                 $o .= atom_author('author',(($item['author-name']) ? $item['author-name'] : $item['name']),(($item['author-link']) ? $item['author-link'] : $item['url']),80,80,(($item['author-avatar']) ? $item['author-avatar'] : $item['thumb']));
1685         if(strlen($item['owner-name']))
1686                 $o .= atom_author('dfrn:owner',$item['owner-name'],$item['owner-link'],80,80,$item['owner-avatar']);
1687
1688         if($item['parent'] != $item['id'])
1689                 $o .= '<thr:in-reply-to ref="' . xmlify($item['parent-uri']) . '" type="text/html" href="' .  xmlify($a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['id']) . '" />' . "\r\n";
1690
1691         $o .= '<id>' . xmlify($item['uri']) . '</id>' . "\r\n";
1692         $o .= '<title>' . xmlify($item['title']) . '</title>' . "\r\n";
1693         $o .= '<published>' . xmlify(datetime_convert('UTC','UTC',$item['created'] . '+00:00',ATOM_TIME)) . '</published>' . "\r\n";
1694         $o .= '<updated>' . xmlify(datetime_convert('UTC','UTC',$item['edited'] . '+00:00',ATOM_TIME)) . '</updated>' . "\r\n";
1695         $o .= '<dfrn:env>' . base64url_encode($body, true) . '</dfrn:env>' . "\r\n";
1696         $o .= '<content type="' . $type . '" >' . xmlify((($type === 'html') ? bbcode($body) : $body)) . '</content>' . "\r\n";
1697         $o .= '<link rel="alternate" type="text/html" href="' . xmlify($a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['id']) . '" />' . "\r\n";
1698         if($comment)
1699                 $o .= '<dfrn:comment-allow>' . intval($item['last-child']) . '</dfrn:comment-allow>' . "\r\n";
1700
1701         if($item['location']) {
1702                 $o .= '<dfrn:location>' . xmlify($item['location']) . '</dfrn:location>' . "\r\n";
1703                 $o .= '<poco:address><poco:formatted>' . xmlify($item['location']) . '</poco:formatted></poco:address>' . "\r\n";
1704         }
1705
1706         if($item['coord'])
1707                 $o .= '<georss:point>' . xmlify($item['coord']) . '</georss:point>' . "\r\n";
1708
1709         if(($item['private']) || strlen($item['allow_cid']) || strlen($item['allow_gid']) || strlen($item['deny_cid']) || strlen($item['deny_gid']))
1710                 $o .= '<dfrn:private>1</dfrn:private>' . "\r\n";
1711
1712         if($item['extid'])
1713                 $o .= '<dfrn:extid>' . xmlify($item['extid']) . '</dfrn:extid>' . "\r\n";
1714         if($item['bookmark'])
1715                 $o .= '<dfrn:bookmark>true</dfrn:bookmark>' . "\r\n";
1716
1717         if($item['app'])
1718                 $o .= '<statusnet:notice_info local_id="' . $item['id'] . '" source="' . xmlify($item['app']) . '" ></statusnet:notice_info>' . "\r\n";
1719
1720         if($item['guid'])
1721                 $o .= '<dfrn:diaspora_guid>' . $item['guid'] . '</dfrn:diaspora_guid>' . "\r\n";
1722
1723         if($item['signed_text']) {
1724                 $sign = base64_encode(json_encode(array('signed_text' => $item['signed_text'],'signature' => $item['signature'],'signer' => $item['signer'])));
1725                 $o .= '<dfrn:diaspora_signature>' . xmlify($sign) . '</dfrn:diaspora_signature>' . "\r\n";
1726         }
1727
1728         $verb = construct_verb($item);
1729         $o .= '<as:verb>' . xmlify($verb) . '</as:verb>' . "\r\n";
1730         $actobj = construct_activity_object($item);
1731         if(strlen($actobj))
1732                 $o .= $actobj;
1733         $actarg = construct_activity_target($item);
1734         if(strlen($actarg))
1735                 $o .= $actarg;
1736
1737         $tags = item_getfeedtags($item);
1738         if(count($tags)) {
1739                 foreach($tags as $t) {
1740                         $o .= '<category scheme="X-DFRN:' . xmlify($t[0]) . ':' . xmlify($t[1]) . '" term="' . xmlify($t[2]) . '" />' . "\r\n";
1741                 }
1742         }
1743
1744         $o .= item_getfeedattach($item);
1745
1746         $mentioned = get_mentions($item);
1747         if($mentioned)
1748                 $o .= $mentioned;
1749
1750         call_hooks('atom_entry', $o);
1751
1752         $o .= '</entry>' . "\r\n";
1753
1754         return $o;
1755 }
1756
1757 function fix_private_photos($s,$uid) {
1758         $a = get_app();
1759         logger('fix_private_photos');
1760
1761         if(preg_match("/\[img\](.*?)\[\/img\]/is",$s,$matches)) {
1762                 $image = $matches[1];
1763                 logger('fix_private_photos: found photo ' . $image);
1764                 if(stristr($image ,$a->get_baseurl() . '/photo/')) {
1765                         $i = basename($image);
1766                         $i = str_replace('.jpg','',$i);
1767                         $x = strpos($i,'-');
1768                         if($x) {
1769                                 $res = substr($i,$x+1);
1770                                 $i = substr($i,0,$x);
1771                                 $r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `scale` = %d AND `uid` = %d",
1772                                         dbesc($i),
1773                                         intval($res),
1774                                         intval($uid)
1775                                 );
1776                                 if(count($r)) {
1777                                         logger('replacing photo');
1778                                         $s = str_replace($image, 'data:image/jpg;base64,' . base64_encode($r[0]['data']), $s);
1779                                 }
1780                         }
1781                         logger('fix_private_photos: replaced: ' . $s, LOGGER_DATA);
1782                 }
1783         }
1784         return($s);
1785 }
1786
1787
1788
1789 function item_getfeedtags($item) {
1790         $ret = array();
1791         $matches = false;
1792         $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|',$item['tag'],$matches);
1793         if($cnt) {
1794                 for($x = 0; $x < count($matches); $x ++) {
1795                         if($matches[1][$x])
1796                                 $ret[] = array('#',$matches[1][$x], $matches[2][$x]);
1797                 }
1798         }
1799         $matches = false;
1800         $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|',$item['tag'],$matches);
1801         if($cnt) {
1802                 for($x = 0; $x < count($matches); $x ++) {
1803                         if($matches[1][$x])
1804                                 $ret[] = array('#',$matches[1][$x], $matches[2][$x]);
1805                 }
1806         }
1807         return $ret;
1808 }
1809
1810 function item_getfeedattach($item) {
1811         $ret = '';
1812         $arr = explode(',',$item['attach']);
1813         if(count($arr)) {
1814                 foreach($arr as $r) {
1815                         $matches = false;
1816                         $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"\[\/attach\]|',$r,$matches);
1817                         if($cnt) {
1818                                 $ret .= '<link rel="enclosure" href="' . xmlify($matches[1]) . '" type="' . xmlify($matches[3]) . '" ';
1819                                 if(intval($matches[2]))
1820                                         $ret .= 'length="' . intval($matches[2]) . '" ';
1821                                 if($matches[4] !== ' ')
1822                                         $ret .= 'title="' . xmlify(trim($matches[4])) . '" ';
1823                                 $ret .= ' />' . "\r\n";
1824                         }
1825                 }
1826         }
1827         return $ret;
1828 }
1829
1830
1831
1832 function item_expire($uid,$days) {
1833
1834         if((! $uid) || (! $days))
1835                 return;
1836
1837         $r = q("SELECT * FROM `item`
1838                 WHERE `uid` = %d
1839                 AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY
1840                 AND `id` = `parent`
1841                 AND `deleted` = 0",
1842                 intval($uid),
1843                 intval($days)
1844         );
1845
1846         if(! count($r))
1847                 return;
1848
1849         logger('expire: # items=' . count($r) );
1850
1851         foreach($r as $item) {
1852
1853                 // Only expire posts, not photos and photo comments
1854
1855                 if(strlen($item['resource-id']))
1856                         continue;
1857
1858                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s' WHERE `id` = %d LIMIT 1",
1859                         dbesc(datetime_convert()),
1860                         dbesc(datetime_convert()),
1861                         intval($item['id'])
1862                 );
1863
1864                 // kill the kids
1865
1866                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d ",
1867                         dbesc(datetime_convert()),
1868                         dbesc(datetime_convert()),
1869                         dbesc($item['parent-uri']),
1870                         intval($item['uid'])
1871                 );
1872
1873         }
1874
1875         proc_run('php',"include/notifier.php","expire","$uid");
1876
1877 }
1878
1879
1880 function drop_items($items) {
1881         $uid = 0;
1882
1883         if(count($items)) {
1884                 foreach($items as $item) {
1885                         $owner = drop_item($item,false);
1886                         if($owner && ! $uid)
1887                                 $uid = $owner;
1888                 }
1889         }
1890
1891         // multiple threads may have been deleted, send an expire notification
1892
1893         if($uid)
1894                 proc_run('php',"include/notifier.php","expire","$uid");
1895 }
1896
1897
1898 function drop_item($id,$interactive = true) {
1899
1900         $a = get_app();
1901
1902         // locate item to be deleted
1903
1904         $r = q("SELECT * FROM `item` WHERE `id` = %d LIMIT 1",
1905                 intval($id)
1906         );
1907
1908         if(! count($r)) {
1909                 if(! $interactive)
1910                         return 0;
1911                 notice( t('Item not found.') . EOL);
1912                 goaway($a->get_baseurl() . '/' . $_SESSION['return_url']);
1913         }
1914
1915         $item = $r[0];
1916
1917         $owner = $item['uid'];
1918
1919         // check if logged in user is either the author or owner of this item
1920
1921         if((local_user() == $item['uid']) || (remote_user() == $item['contact-id'])) {
1922
1923                 // delete the item
1924
1925                 $r = q("UPDATE `item` SET `deleted` = 1, `body` = '', `edited` = '%s', `changed` = '%s' WHERE `id` = %d LIMIT 1",
1926                         dbesc(datetime_convert()),
1927                         dbesc(datetime_convert()),
1928                         intval($item['id'])
1929                 );
1930
1931                 // If item is a link to a photo resource, nuke all the associated photos
1932                 // (visitors will not have photo resources)
1933                 // This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1934                 // generate a resource-id and therefore aren't intimately linked to the item.
1935
1936                 if(strlen($item['resource-id'])) {
1937                         q("DELETE FROM `photo` WHERE `resource-id` = '%s' AND `uid` = %d ",
1938                                 dbesc($item['resource-id']),
1939                                 intval($item['uid'])
1940                         );
1941                         // ignore the result
1942                 }
1943
1944                 // If item is a link to an event, nuke the event record.
1945
1946                 if(intval($item['event-id'])) {
1947                         q("DELETE FROM `event` WHERE `id` = %d AND `uid` = %d LIMIT 1",
1948                                 intval($item['event-id']),
1949                                 intval($item['uid'])
1950                         );
1951                         // ignore the result
1952                 }
1953
1954
1955                 // If it's the parent of a comment thread, kill all the kids
1956
1957                 if($item['uri'] == $item['parent-uri']) {
1958                         $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s', `body` = ''
1959                                 WHERE `parent-uri` = '%s' AND `uid` = %d ",
1960                                 dbesc(datetime_convert()),
1961                                 dbesc(datetime_convert()),
1962                                 dbesc($item['parent-uri']),
1963                                 intval($item['uid'])
1964                         );
1965                         // ignore the result
1966                 }
1967                 else {
1968                         // ensure that last-child is set in case the comment that had it just got wiped.
1969                         q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d ",
1970                                 dbesc(datetime_convert()),
1971                                 dbesc($item['parent-uri']),
1972                                 intval($item['uid'])
1973                         );
1974                         // who is the last child now?
1975                         $r = q("SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `uid` = %d ORDER BY `edited` DESC LIMIT 1",
1976                                 dbesc($item['parent-uri']),
1977                                 intval($item['uid'])
1978                         );
1979                         if(count($r)) {
1980                                 q("UPDATE `item` SET `last-child` = 1 WHERE `id` = %d LIMIT 1",
1981                                         intval($r[0]['id'])
1982                                 );
1983                         }
1984                 }
1985                 $drop_id = intval($item['id']);
1986
1987                 // send the notification upstream/downstream as the case may be
1988
1989                 if(! $interactive)
1990                         return $owner;
1991
1992                 proc_run('php',"include/notifier.php","drop","$drop_id");
1993                 goaway($a->get_baseurl() . '/' . $_SESSION['return_url']);
1994                 //NOTREACHED
1995         }
1996         else {
1997                 if(! $interactive)
1998                         return 0;
1999                 notice( t('Permission denied.') . EOL);
2000                 goaway($a->get_baseurl() . '/' . $_SESSION['return_url']);
2001                 //NOTREACHED
2002         }
2003
2004 }