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