mod/dfrn_notify.php

   1 <?php
   2
   3 require_once('simplepie/simplepie.inc');
   4 require_once('include/items.php');
   5 function dfrn_notify_post(&$a) {
   6
   7         $dfrn_id      = ((x($_POST,'dfrn_id'))      ? notags(trim($_POST['dfrn_id']))   : '');
   8         $dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version']    : 2.0);
   9         $challenge    = ((x($_POST,'challenge'))    ? notags(trim($_POST['challenge'])) : '');
  10         $data         = ((x($_POST,'data'))         ? $_POST['data']                    : '');
  11         $key          = ((x($_POST,'key'))          ? $_POST['key']                     : '');
  12         $dissolve     = ((x($_POST,'dissolve'))     ? intval($_POST['dissolve'])        :  0);
  13
  14         $direction = (-1);
  15         if(strpos($dfrn_id,':') == 1) {
  16                 $direction = intval(substr($dfrn_id,0,1));
  17                 $dfrn_id = substr($dfrn_id,2);
  18         }
  19
  20         $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
  21                 dbesc($dfrn_id),
  22                 dbesc($challenge)
  23         );
  24         if(! count($r)) {
  25                 logger('dfrn_notify: could not match challenge to dfrn_id ' . $dfrn_id . ' challenge=' . $challenge);
  26                 xml_status(3);
  27         }
  28
  29         $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
  30                 dbesc($dfrn_id),
  31                 dbesc($challenge)
  32         );
  33
  34         // find the local user who owns this relationship.
  35
  36         $sql_extra = '';
  37         switch($direction) {
  38                 case (-1):
  39                         $sql_extra = sprintf(" AND ( `issued-id` = '%s' OR `dfrn-id` = '%s' ) ", dbesc($dfrn_id), dbesc($dfrn_id));
  40                         break;
  41                 case 0:
  42                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  43                         break;
  44                 case 1:
  45                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  46                         break;
  47                 default:
  48                         xml_status(3);
  49                         break; // NOTREACHED
  50         }
  51
  52
  53         $r = q("SELECT  `contact`.*, `contact`.`uid` AS `importer_uid`,
  54                                         `contact`.`pubkey` AS `cpubkey`,
  55                                         `contact`.`prvkey` AS `cprvkey`,
  56                                         `contact`.`thumb` AS `thumb`,
  57                                         `contact`.`url` as `url`,
  58                                         `contact`.`name` as `senderName`,
  59                                         `user`.*
  60                         FROM `contact`
  61                         LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
  62                         WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
  63                                 AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
  64                 dbesc($a->argv[1])
  65         );
  66
  67         if(! count($r)) {
  68                 logger('dfrn_notify: contact not found for dfrn_id ' . $dfrn_id);
  69                 xml_status(3);
  70                 //NOTREACHED
  71         }
  72
  73         // $importer in this case contains the contact record for the remote contact joined with the user record of our user.
  74
  75         $importer = $r[0];
  76
  77         logger('dfrn_notify: received notify from ' . $importer['name'] . ' for ' . $importer['username']);
  78         logger('dfrn_notify: data: ' . $data, LOGGER_DATA);
  79
  80         if($dissolve == 1) {
  81
  82                 /**
  83                  * Relationship is dissolved permanently
  84                  */
  85
  86                 require_once('include/Contact.php');
  87                 contact_remove($importer['id']);
  88                 logger('relationship dissolved : ' . $importer['name'] . ' dissolved ' . $importer['username']);
  89                 xml_status(0);
  90
  91         }
  92
  93         if(strlen($key)) {
  94                 $rawkey = hex2bin(trim($key));
  95                 logger('rino: md5 raw key: ' . md5($rawkey));
  96                 $final_key = '';
  97
  98                 if($dfrn_version >= 2.1) {
  99                         if((($importer['duplex']) && strlen($importer['cprvkey'])) || (! strlen($importer['cpubkey']))) {
 100                                 openssl_private_decrypt($rawkey,$final_key,$importer['cprvkey']);
 101                         }
 102                         else {
 103                                 openssl_public_decrypt($rawkey,$final_key,$importer['cpubkey']);
 104                         }
 105                 }
 106                 else {
 107                         if((($importer['duplex']) && strlen($importer['cpubkey'])) || (! strlen($importer['cprvkey']))) {
 108                                 openssl_public_decrypt($rawkey,$final_key,$importer['cpubkey']);
 109                         }
 110                         else {
 111                                 openssl_private_decrypt($rawkey,$final_key,$importer['cprvkey']);
 112                         }
 113                 }
 114
 115                 logger('rino: received key : ' . $final_key);
 116                 $data = aes_decrypt(hex2bin($data),$final_key);
 117                 logger('rino: decrypted data: ' . $data, LOGGER_DATA);
 118         }
 119
 120
 121
 122
 123         if($importer['readonly']) {
 124                 // We aren't receiving stuff from this person. But we will quietly ignore them
 125                 // rather than a blatant "go away" message.
 126                 logger('dfrn_notify: ignoring');
 127                 xml_status(0);
 128                 //NOTREACHED
 129         }
 130
 131         // Consume notification feed. This may differ from consuming a public feed in several ways
 132         // - might contain email
 133         // - might contain remote followup to our message
 134         //              - in which case we need to accept it and then notify other conversants
 135         // - we may need to send various email notifications
 136
 137         $feed = new SimplePie();
 138         $feed->set_raw_data($data);
 139         $feed->enable_order_by_date(false);
 140         $feed->init();
 141
 142         $ismail = false;
 143
 144         $rawmail = $feed->get_feed_tags( NAMESPACE_DFRN, 'mail' );
 145         if(isset($rawmail[0]['child'][NAMESPACE_DFRN])) {
 146
 147                 logger('dfrn_notify: private message received');
 148
 149                 $ismail = true;
 150                 $base = $rawmail[0]['child'][NAMESPACE_DFRN];
 151
 152                 $msg = array();
 153                 $msg['uid'] = $importer['importer_uid'];
 154                 $msg['from-name'] = notags(unxmlify($base['sender'][0]['child'][NAMESPACE_DFRN]['name'][0]['data']));
 155                 $msg['from-photo'] = notags(unxmlify($base['sender'][0]['child'][NAMESPACE_DFRN]['avatar'][0]['data']));
 156                 $msg['from-url'] = notags(unxmlify($base['sender'][0]['child'][NAMESPACE_DFRN]['uri'][0]['data']));
 157                 $msg['contact-id'] = $importer['id'];
 158                 $msg['title'] = notags(unxmlify($base['subject'][0]['data']));
 159                 $msg['body'] = escape_tags(unxmlify($base['content'][0]['data']));
 160                 $msg['seen'] = 0;
 161                 $msg['replied'] = 0;
 162                 $msg['uri'] = notags(unxmlify($base['id'][0]['data']));
 163                 $msg['parent-uri'] = notags(unxmlify($base['in-reply-to'][0]['data']));
 164                 $msg['created'] = datetime_convert(notags(unxmlify('UTC','UTC',$base['sentdate'][0]['data'])));
 165
 166                 dbesc_array($msg);
 167
 168                 $r = dbq("INSERT INTO `mail` (`" . implode("`, `", array_keys($msg))
 169                         . "`) VALUES ('" . implode("', '", array_values($msg)) . "')" );
 170
 171                 // send email notification if requested.
 172
 173                 require_once('bbcode.php');
 174                 if($importer['notify-flags'] & NOTIFY_MAIL) {
 175
 176                         // generate a mime boundary
 177                         $msg['mimeboundary']   =rand(0,9)."-"
 178                                 .rand(10000000000,9999999999)."-"
 179                                 .rand(10000000000,9999999999)."=:"
 180                                 .rand(10000,99999);
 181
 182                         // name of the automated email sender
 183                         $msg['notificationfromname']    = t('Administrator');
 184                         // noreply address to send from
 185                         $msg['notificationfromemail']   = t('noreply') . '@' . $a->get_hostname();
 186                         // message headers
 187                         $msg['headers'] =
 188                                 "From: {$msg['notificationfromname']} <{$msg['notificationfromemail']}>\n" .
 189                                 "Reply-To: {$msg['notificationfromemail']}\n" .
 190                                 "MIME-Version: 1.0\n" .
 191                                 "Content-Type: multipart/alternative; boundary=\"{$msg['mimeboundary']}\"";
 192
 193                         // text version
 194                         // process the message body to display properly in text mode
 195                         //              1) substitute a \n character for the "\" then "n", so it behaves properly (it doesn't come in as a \n character)
 196                         //              2) remove escape slashes
 197                         //              3) decode any bbcode from the message editor
 198                         //              4) decode any encoded html tags
 199                         //              5) remove html tags
 200                         $msg['textversion']
 201                                 = strip_tags(html_entity_decode(bbcode(stripslashes(str_replace(array("\\r\\n", "\\r", "\\n"), "\n",$msg['body']))),ENT_QUOTES,'UTF-8'));
 202
 203                         // html version
 204                         // process the message body to display properly in text mode
 205                         //              1) substitute a <br /> tag for the "\" then "n", so it behaves properly (it doesn't come in as a \n character)
 206                         //              2) remove escape slashes
 207                         //              3) decode any bbcode from the message editor
 208                         //              4) decode any encoded html tags
 209                         $msg['htmlversion']
 210                                 = html_entity_decode(bbcode(stripslashes(str_replace(array("\\r\\n", "\\r","\\n\\n" ,"\\n"), "<br />\n",$msg['body']))));
 211
 212                         // load the template for private message notifications
 213                         $tpl = load_view_file('view/mail_received_html_body_eml.tpl');
 214                         $email_html_body_tpl = replace_macros($tpl,array(
 215                                 '$siteName'             => $a->config['sitename'],                              // name of this site
 216                                 '$siteurl'              => $a->get_baseurl(),                                   // descriptive url of this site
 217                                 '$thumb'                => $importer['thumb'],                                  // thumbnail url for sender icon
 218                                 '$email'                => $importer['email'],                                  // email address to send to
 219                                 '$url'                  => $importer['url'],                                    // full url for the site
 220                                 '$from'                 => $msg['from-name'],                                   // name of the person sending the message
 221                                 '$title'                => stripslashes($msg['title']),                 // subject of the message
 222                                 '$htmlversion'  => $msg['htmlversion'],                                 // html version of the message
 223                                 '$mimeboundary' => $msg['mimeboundary'],                                // mime message divider
 224                                 '$hostname'             => $a->get_hostname()                                   // name of this host
 225                         ));
 226
 227                         // load the template for private message notifications
 228                         $tpl = load_view_file('view/mail_received_text_body_eml.tpl');
 229                         $email_text_body_tpl = replace_macros($tpl,array(
 230                                 '$siteName'             => $a->config['sitename'],                              // name of this site
 231                                 '$siteurl'              => $a->get_baseurl(),                                   // descriptive url of this site
 232                                 '$thumb'                => $importer['thumb'],                                  // thumbnail url for sender icon
 233                                 '$email'                => $importer['email'],                                  // email address to send to
 234                                 '$url'                  => $importer['url'],                                    // full url for the site
 235                                 '$from'                 => $msg['from-name'],                                   // name of the person sending the message
 236                                 '$title'                => stripslashes($msg['title']),                 // subject of the message
 237                                 '$textversion'  => $msg['textversion'],                                 // text version of the message
 238                                 '$mimeboundary' => $msg['mimeboundary'],                                // mime message divider
 239                                 '$hostname'             => $a->get_hostname()                                   // name of this host
 240                         ));
 241
 242                         // assemble the final multipart message body with the text and html types included
 243                         $textbody       =       chunk_split(base64_encode($email_text_body_tpl));
 244                         $htmlbody       =       chunk_split(base64_encode($email_html_body_tpl));
 245                         $multipart_message_body =
 246                                 "--" . $msg['mimeboundary'] . "\n" .                                    // plain text section
 247                                 "Content-Type: text/plain; charset=UTF-8\n" .
 248                                 "Content-Transfer-Encoding: base64\n\n" .
 249                                 $textbody . "\n" .
 250                                 "--" . $msg['mimeboundary'] . "\n" .                                    // text/html section
 251                                 "Content-Type: text/html; charset=UTF-8\n" .
 252                                 "Content-Transfer-Encoding: base64\n\n" .
 253                                 $htmlbody . "\n" .
 254                                 "--" . $msg['mimeboundary'] . "--\n";                                   // message ending
 255
 256
 257                         // send the message
 258                         $res = mail(
 259                                 $importer['email'],                                                                     // send to address
 260                                 t('New mail received at ') . $a->config['sitename'],    // subject
 261                                 $multipart_message_body,                                                                // message body
 262                                 $msg['headers']                                                                                 // message headers
 263                         );
 264                 }
 265                 xml_status(0);
 266                 // NOTREACHED
 267         }
 268
 269         logger('dfrn_notify: feed item count = ' . $feed->get_item_quantity());
 270
 271         // process any deleted entries
 272
 273         $del_entries = $feed->get_feed_tags(NAMESPACE_TOMB, 'deleted-entry');
 274         if(is_array($del_entries) && count($del_entries)) {
 275                 foreach($del_entries as $dentry) {
 276                         $deleted = false;
 277                         if(isset($dentry['attribs']['']['ref'])) {
 278                                 $uri = $dentry['attribs']['']['ref'];
 279                                 $deleted = true;
 280                                 if(isset($dentry['attribs']['']['when'])) {
 281                                         $when = $dentry['attribs']['']['when'];
 282                                         $when = datetime_convert('UTC','UTC', $when, 'Y-m-d H:i:s');
 283                                 }
 284                                 else
 285                                         $when = datetime_convert('UTC','UTC','now','Y-m-d H:i:s');
 286                         }
 287                         if($deleted) {
 288                                 $r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 289                                         dbesc($uri),
 290                                         intval($importer['importer_uid'])
 291                                 );
 292                                 if(count($r)) {
 293                                         $item = $r[0];
 294
 295                                         if(! $item['deleted'])
 296                                                 logger('dfrn_notify: deleting item ' . $item['id'] . ' uri=' . $item['uri'], LOGGER_DEBUG);
 297
 298                                         if($item['uri'] == $item['parent-uri']) {
 299                                                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s'
 300                                                         WHERE `parent-uri` = '%s' AND `uid` = %d",
 301                                                         dbesc($when),
 302                                                         dbesc(datetime_convert()),
 303                                                         dbesc($item['uri']),
 304                                                         intval($importer['importer_uid'])
 305                                                 );
 306                                         }
 307                                         else {
 308                                                 $r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s'
 309                                                         WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 310                                                         dbesc($when),
 311                                                         dbesc(datetime_convert()),
 312                                                         dbesc($uri),
 313                                                         intval($importer['importer_uid'])
 314                                                 );
 315                                                 if($item['last-child']) {
 316                                                         // ensure that last-child is set in case the comment that had it just got wiped.
 317                                                         q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d ",
 318                                                                 dbesc(datetime_convert()),
 319                                                                 dbesc($item['parent-uri']),
 320                                                                 intval($item['uid'])
 321                                                         );
 322                                                         // who is the last child now?
 323                                                         $r = q("SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `uid` = %d
 324                                                                 ORDER BY `created` DESC LIMIT 1",
 325                                                                         dbesc($item['parent-uri']),
 326                                                                         intval($importer['importer_uid'])
 327                                                         );
 328                                                         if(count($r)) {
 329                                                                 q("UPDATE `item` SET `last-child` = 1 WHERE `id` = %d LIMIT 1",
 330                                                                         intval($r[0]['id'])
 331                                                                 );
 332                                                         }
 333                                                 }
 334                                         }
 335                                 }
 336                         }
 337                 }
 338         }
 339
 340
 341         foreach($feed->get_items() as $item) {
 342
 343                 $is_reply = false;
 344                 $item_id = $item->get_id();
 345                 $rawthread = $item->get_item_tags( NAMESPACE_THREAD, 'in-reply-to');
 346                 if(isset($rawthread[0]['attribs']['']['ref'])) {
 347                         $is_reply = true;
 348                         $parent_uri = $rawthread[0]['attribs']['']['ref'];
 349                 }
 350
 351                 if($is_reply) {
 352                         if($feed->get_item_quantity() == 1) {
 353                                 logger('dfrn_notify: received remote comment');
 354                                 $is_like = false;
 355                                 // remote reply to our post. Import and then notify everybody else.
 356                                 $datarray = get_atom_elements($feed,$item);
 357                                 $datarray['type'] = 'remote-comment';
 358                                 $datarray['wall'] = 1;
 359                                 $datarray['parent-uri'] = $parent_uri;
 360                                 $datarray['uid'] = $importer['importer_uid'];
 361                                 $datarray['contact-id'] = $importer['id'];
 362                                 if(($datarray['verb'] == ACTIVITY_LIKE) || ($datarray['verb'] == ACTIVITY_DISLIKE)) {
 363                                         $is_like = true;
 364                                         $datarray['type'] = 'activity';
 365                                         $datarray['gravity'] = GRAVITY_LIKE;
 366                                         $datarray['last-child'] = 0;
 367                                 }
 368                                 $posted_id = item_store($datarray);
 369                                 $parent = 0;
 370
 371                                 if($posted_id) {
 372                                         $r = q("SELECT `parent` FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 373                                                 intval($posted_id),
 374                                                 intval($importer['importer_uid'])
 375                                         );
 376                                         if(count($r))
 377                                                 $parent = $r[0]['parent'];
 378
 379                                         if(! $is_like) {
 380                                                 $r1 = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `uid` = %d AND `parent` = %d",
 381                                                         dbesc(datetime_convert()),
 382                                                         intval($importer['importer_uid']),
 383                                                         intval($r[0]['parent'])
 384                                                 );
 385
 386                                                 $r2 = q("UPDATE `item` SET `last-child` = 1, `changed` = '%s' WHERE `uid` = %d AND `id` = %d LIMIT 1",
 387                                                         dbesc(datetime_convert()),
 388                                                         intval($importer['importer_uid']),
 389                                                         intval($posted_id)
 390                                                 );
 391                                         }
 392
 393                                         if($posted_id && $parent) {
 394
 395                                                 $php_path = ((strlen($a->config['php_path'])) ? $a->config['php_path'] : 'php');
 396
 397                                                 proc_run($php_path,"include/notifier.php","comment-import","$posted_id");
 398
 399                                                 if((! $is_like) && ($importer['notify-flags'] & NOTIFY_COMMENT) && (! $importer['self'])) {
 400                                                         require_once('bbcode.php');
 401                                                         $from = stripslashes($datarray['author-name']);
 402                                                         $tpl = load_view_file('view/cmnt_received_eml.tpl');
 403                                                         $email_tpl = replace_macros($tpl, array(
 404                                                                 '$sitename' => $a->config['sitename'],
 405                                                                 '$siteurl' =>  $a->get_baseurl(),
 406                                                                 '$username' => $importer['username'],
 407                                                                 '$email' => $importer['email'],
 408                                                                 '$display' => $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $posted_id,
 409                                                                 '$from' => $from,
 410                                                                 '$body' => strip_tags(bbcode(stripslashes($datarray['body'])))
 411                                                         ));
 412
 413                                                         $res = mail($importer['email'], $from . t(' commented on an item at ') . $a->config['sitename'],
 414                                                                 $email_tpl, "From: " . t('Administrator') . '@' . $a->get_hostname() );
 415                                                 }
 416                                         }
 417                                         xml_status(0);
 418                                         // NOTREACHED
 419                                 }
 420                         }
 421                         else {
 422                                 // regular comment that is part of this total conversation. Have we seen it? If not, import it.
 423
 424                                 $item_id = $item->get_id();
 425
 426                                 $r = q("SELECT `uid`, `last-child`, `edited` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 427                                         dbesc($item_id),
 428                                         intval($importer['importer_uid'])
 429                                 );
 430                                 // FIXME update content if 'updated' changes
 431                                 if(count($r)) {
 432                                         $allow = $item->get_item_tags( NAMESPACE_DFRN, 'comment-allow');
 433                                         if($allow && $allow[0]['data'] != $r[0]['last-child']) {
 434                                                 $r = q("UPDATE `item` SET `last-child` = %d, `changed` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 435                                                         intval($allow[0]['data']),
 436                                                         dbesc(datetime_convert()),
 437                                                         dbesc($item_id),
 438                                                         intval($importer['importer_uid'])
 439                                                 );
 440                                         }
 441                                         continue;
 442                                 }
 443                                 $datarray = get_atom_elements($feed,$item);
 444                                 $datarray['parent-uri'] = $parent_uri;
 445                                 $datarray['uid'] = $importer['importer_uid'];
 446                                 $datarray['contact-id'] = $importer['id'];
 447                                 if(($datarray['verb'] == ACTIVITY_LIKE) || ($datarray['verb'] == ACTIVITY_DISLIKE)) {
 448                                         $datarray['type'] = 'activity';
 449                                         $datarray['gravity'] = GRAVITY_LIKE;
 450                                 }
 451                                 $r = item_store($datarray);
 452
 453                                 // find out if our user is involved in this conversation and wants to be notified.
 454
 455                                 if(($datarray['type'] != 'activity') && ($importer['notify-flags'] & NOTIFY_COMMENT)) {
 456
 457                                         $myconv = q("SELECT `author-link` FROM `item` WHERE `parent-uri` = '%s' AND `uid` = %d AND `parent` != 0 ",
 458                                                 dbesc($parent_uri),
 459                                                 intval($importer['importer_uid'])
 460                                         );
 461                                         if(count($myconv)) {
 462                                                 $importer_url = $a->get_baseurl() . '/profile/' . $importer['nickname'];
 463                                                 foreach($myconv as $conv) {
 464                                                         if(! link_compare($conv['author-link'],$importer_url))
 465                                                                 continue;
 466                                                         require_once('bbcode.php');
 467                                                         $from = stripslashes($datarray['author-name']);
 468                                                         $tpl = load_view_file('view/cmnt_received_eml.tpl');
 469                                                         $email_tpl = replace_macros($tpl, array(
 470                                                                 '$sitename' => $a->config['sitename'],
 471                                                                 '$siteurl' =>  $a->get_baseurl(),
 472                                                                 '$username' => $importer['username'],
 473                                                                 '$email' => $importer['email'],
 474                                                                 '$from' => $from,
 475                                                                 '$display' => $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $r,
 476                                                                 '$body' => strip_tags(bbcode(stripslashes($datarray['body'])))
 477                                                         ));
 478
 479                                                         $res = mail($importer['email'], $from . t(" commented on an item at ")
 480                                                                 . $a->config['sitename'],
 481                                                                 $email_tpl,t("From: Administrator@") . $a->get_hostname() );
 482                                                         break;
 483                                                 }
 484                                         }
 485                                 }
 486                                 continue;
 487                         }
 488                 }
 489                 else {
 490                         // Head post of a conversation. Have we seen it? If not, import it.
 491
 492                         $item_id = $item->get_id();
 493                         $r = q("SELECT `uid`, `last-child`, `edited` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 494                                 dbesc($item_id),
 495                                 intval($importer['importer_uid'])
 496                         );
 497                         if(count($r)) {
 498                                 $allow = $item->get_item_tags( NAMESPACE_DFRN, 'comment-allow');
 499                                 if($allow && $allow[0]['data'] != $r[0]['last-child']) {
 500                                         $r = q("UPDATE `item` SET `last-child` = %d, `changed` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 501                                                 intval($allow[0]['data']),
 502                                                 dbesc(datetime_convert()),
 503                                                 dbesc($item_id),
 504                                                 intval($importer['importer_uid'])
 505                                         );
 506                                 }
 507                                 continue;
 508                         }
 509
 510
 511                         $datarray = get_atom_elements($feed,$item);
 512                         $datarray['parent-uri'] = $item_id;
 513                         $datarray['uid'] = $importer['importer_uid'];
 514                         $datarray['contact-id'] = $importer['id'];
 515                         $r = item_store($datarray);
 516                         continue;
 517                 }
 518         }
 519
 520         xml_status(0);
 521         // NOTREACHED
 522
 523 }
 524
 525
 526 function dfrn_notify_content(&$a) {
 527
 528         if(x($_GET,'dfrn_id')) {
 529
 530                 // initial communication from external contact, $direction is their direction.
 531                 // If this is a duplex communication, ours will be the opposite.
 532
 533                 $dfrn_id = notags(trim($_GET['dfrn_id']));
 534                 $dfrn_version = (float) $_GET['dfrn_version'];
 535
 536                 logger('dfrn_notify: new notification dfrn_id=' . $dfrn_id);
 537
 538                 $direction = (-1);
 539                 if(strpos($dfrn_id,':') == 1) {
 540                         $direction = intval(substr($dfrn_id,0,1));
 541                         $dfrn_id = substr($dfrn_id,2);
 542                 }
 543
 544                 $hash = random_string();
 545
 546                 $status = 0;
 547
 548                 $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
 549
 550                 $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` )
 551                         VALUES( '%s', '%s', %d ) ",
 552                         dbesc($hash),
 553                         dbesc($dfrn_id),
 554                         intval(time() + 90 )
 555                 );
 556
 557                 logger('dfrn_notify: challenge=' . $hash );
 558
 559                 $sql_extra = '';
 560                 switch($direction) {
 561                         case (-1):
 562                                 $sql_extra = sprintf(" AND ( `issued-id` = '%s' OR `dfrn-id` = '%s' ) ", dbesc($dfrn_id), dbesc($dfrn_id));
 563                                 $my_id = $dfrn_id;
 564                                 break;
 565                         case 0:
 566                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 567                                 $my_id = '1:' . $dfrn_id;
 568                                 break;
 569                         case 1:
 570                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 571                                 $my_id = '0:' . $dfrn_id;
 572                                 break;
 573                         default:
 574                                 $status = 1;
 575                                 break; // NOTREACHED
 576                 }
 577
 578                 $r = q("SELECT `contact`.*, `user`.`nickname` FROM `contact` LEFT JOIN `user` ON `user`.`uid` = `contact`.`uid`
 579                                 WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0 AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
 580                                 dbesc($a->argv[1])
 581                 );
 582
 583                 if(! count($r))
 584                         $status = 1;
 585
 586                 $challenge = '';
 587                 $encrypted_id = '';
 588                 $id_str = $my_id . '.' . mt_rand(1000,9999);
 589
 590                 if((($r[0]['duplex']) && strlen($r[0]['prvkey'])) || (! strlen($r[0]['pubkey']))) {
 591                         openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
 592                         openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
 593                 }
 594                 else {
 595                         openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
 596                         openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
 597                 }
 598
 599                 $challenge    = bin2hex($challenge);
 600                 $encrypted_id = bin2hex($encrypted_id);
 601
 602                 $rino = ((function_exists('mcrypt_encrypt')) ? 1 : 0);
 603
 604                 $rino_enable = get_config('system','rino_encrypt');
 605
 606                 if(! $rino_enable)
 607                         $rino = 0;
 608
 609
 610                 header("Content-type: text/xml");
 611
 612                 echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
 613                         . '<dfrn_notify>' . "\r\n"
 614                         . "\t" . '<status>' . $status . '</status>' . "\r\n"
 615                         . "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
 616                         . "\t" . '<rino>' . $rino . '</rino>' . "\r\n"
 617                         . "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
 618                         . "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
 619                         . '</dfrn_notify>' . "\r\n" ;
 620
 621                 killme();
 622         }
 623
 624 }