mod/dfrn_notify.php

   1 <?php
   2
   3 require_once('simplepie/simplepie.inc');
   4
   5
   6 function get_atom_elements($item) {
   7
   8         $res = array();
   9
  10         $author = $item->get_author();
  11         $res['remote-name'] = $author->get_name();
  12         $res['remote-link'] = $author->get_link();
  13         $res['remote-avatar'] = $author->get_avatar();
  14         $res['remote-id'] = $item->get_id();
  15         $res['title'] = $item->get_title();
  16         $res['body'] = $item->get_content();
  17
  18         if(strlen($res['body']) > 100000)
  19                 $res['body'] = substr($res['body'],0,10000) . "\r\n[Extremely large post truncated.]\r\n"  ;
  20
  21         $allow = $item->get_item_tags('http://purl.org/macgirvin/dfrn/1.0','comment-allow');
  22         if($allow && $allow[0]['data'] == 1)
  23                 $res['last-child'] = 1;
  24         else
  25                 $res['last-child'] = 0;
  26
  27         $rawcreated = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'published');
  28         if($rawcreated)
  29                 $res['created'] = $rawcreated[0]['data'];
  30
  31         $rawedited = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'updated');
  32         if($rawedited)
  33                 $res['edited'] = $rawcreated[0]['data'];
  34
  35
  36
  37         return $res;
  38
  39 }
  40
  41 function post_remote($arr) {
  42
  43         $arr['hash'] = random_string();
  44         $arr['type'] = 'remote';
  45         $arr['remote-name'] = notags(trim($arr['remote-name']));
  46         $arr['remote-link'] = notags(trim($arr['remote-link']));
  47         $arr['remote-avatar'] = notags(trim($arr['remote-avatar']));
  48         if(! strlen($arr['remote-avatar']))
  49                 $arr['remote-avatar'] = $a->get_baseurl() . '/images/default-profile-sm.jpg';
  50         $arr['created'] = datetime_convert('UTC','UTC',$arr['created'],'Y-m-d H:i:s');
  51         $arr['edited'] = datetime_convert('UTC','UTC',$arr['edited'],'Y-m-d H:i:s');
  52         $arr['title'] = notags(trim($arr['title']));
  53         $arr['body'] = escape_tags(trim($arr['body']));
  54         $arr['last-child'] = intval($arr['last_child']);
  55         $arr['visible'] = 1;
  56         $arr['deleted'] = 0;
  57
  58         $parent = $arr['parent_urn'];
  59
  60         unset($arr['parent_urn']);
  61
  62         $parent_id = 0;
  63
  64         dbesc_array($arr);
  65
  66         $r = q("INSERT INTO `item` (`"
  67                         . implode("`, `", array_keys($arr))
  68                         . "`) VALUES ('"
  69                         . implode("', '", array_values($arr))
  70                         . "')" );
  71
  72
  73         $r = q("SELECT `id` FROM `item` WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
  74                 dbesc($parent),
  75                 intval($arr['uid'])
  76         );
  77         if(count($r))
  78                 $parent_id = $r[0]['id'];
  79
  80
  81         $r = q("SELECT `id` FROM `item` WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
  82                 $arr['remote-id'],
  83                 intval($arr['uid'])
  84         );
  85         if(count($r))
  86                 $current_post = $r[0]['id'];
  87
  88         $r = q("UPDATE `item` SET `parent` = %d WHERE `id` = %d LIMIT 1",
  89                 intval($parent_id),
  90                 intval($current_post)
  91         );
  92
  93 }
  94
  95 function dfrn_notify_post(&$a) {
  96 dbg(3);
  97         $dfrn_id = notags(trim($_POST['dfrn_id']));
  98         $challenge = notags(trim($_POST['challenge']));
  99         $data = $_POST['data'];
 100         $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 101                 dbesc($dfrn_id),
 102                 dbesc($challenge)
 103         );
 104         if(! count($r))
 105                 xml_status(3);
 106
 107         $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 108                 dbesc($dfrn_id),
 109                 dbesc($challenge)
 110         );
 111
 112         // find the local user who owns this relationship.
 113
 114         $r = q("SELECT `id`, `uid` FROM `contact` WHERE `issued-id` = '%s' LIMIT 1",
 115                 dbesc($dfrn_id)
 116         );
 117         if(! count($r))
 118                 xml_status(3);
 119
 120
 121         $importer = $r[0];
 122
 123         $feed = new SimplePie();
 124         $feed->set_raw_data($data);
 125         $feed->enable_order_by_date(false);
 126         $feed->init();
 127
 128         foreach($feed->get_items() as $item) {
 129
 130                 $rawdelete = $item->get_item_tags("http://purl.org/atompub/tombstones/1.0", 'deleted-entry');
 131                 print_r($rawdelete);
 132                 if($deleted) {
 133                         // pick out ref and when from attribs
 134                         // check hasn't happened already, verify ownership and then process it
 135
 136
 137                         continue;
 138                 }
 139
 140                 $is_reply = false;
 141                 $item_id = $item->get_id();
 142                 $rawthread = $item->get_item_tags("http://purl.org/syndication/thread/1.0",'in-reply-to');
 143                 if(isset($rawthread[0]['attribs']['']['ref'])) {
 144                         $is_reply = true;
 145                         $parent_urn = $rawthread[0]['attribs']['']['ref'];
 146                 }
 147
 148
 149                 if($is_reply) {
 150                         if($x == ($total_items - 1)) {
 151                                 // remote reply to our post. Import and then notify everybody else.
 152                         }
 153                         else {
 154                                 // regular comment that is part of this total conversation. Have we seen it? If not, import it.
 155
 156                                 $item_id = $item->get_id();
 157
 158                                 $r = q("SELECT `uid`, `last-child` FROM `item` WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
 159                                         dbesc($item_id),
 160                                         intval($importer['uid'])
 161                                 );
 162                                 if(count($r)) {
 163                                         $allow = $item->get_item_tags('http://purl.org/macgirvin/dfrn/1.0','comment-allow');
 164                                         if($allow && $allow[0]['data'] != $r[0]['last-child']) {
 165                                                 $r = q("UPDATE `item` SET `last-child` = %d WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
 166                                                         intval($allow[0]['data']),
 167                                                         dbesc($item_id)
 168                                                 );
 169                                         }
 170                                         continue;
 171                                 }
 172                                 $datarray = get_atom_elements($item);
 173                                 $datarray['parent_urn'] = $parent_urn;
 174                                 $datarray['uid'] = $importer['uid'];
 175                                 $datarray['contact-id'] = $importer['id'];
 176                                 $r = post_remote($datarray);
 177                                 continue;
 178                         }
 179                 }
 180                 else {
 181                         // Head post of a conversation. Have we seen it? If not, import it.
 182
 183                         $item_id = $item->get_id();
 184                         $r = q("SELECT `uid` FROM `item` WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
 185                                 dbesc($item_id),
 186                                 intval($importer['uid'])
 187                         );
 188                         if(count($r)) {
 189                                 $allow = $item->get_item_tags('http://purl.org/macgirvin/dfrn/1.0','comment-allow');
 190                                 if($allow && $allow[0]['data'] != $r[0]['last-child']) {
 191                                         $r = q("UPDATE `item` SET `last-child` = %d WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
 192                                                 intval($allow[0]['data']),
 193                                                 dbesc($item_id)
 194                                         );
 195                                 }
 196                                 continue;
 197                         }
 198
 199
 200                         $datarray = get_atom_elements($item);
 201                         $datarray['parent_urn'] = $item_id;
 202                         $datarray['uid'] = $importer['uid'];
 203                         $datarray['contact-id'] = $importer['id'];
 204                         $r = post_remote($datarray);
 205                         continue;
 206
 207                 }
 208
 209         }
 210
 211
 212         killme();
 213
 214 }
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225 function dfrn_notify_content(&$a) {
 226
 227         if(x($_GET,'dfrn_id')) {
 228                 // initial communication from external contact
 229                 $hash = random_string();
 230
 231                 $status = 0;
 232
 233                 $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
 234
 235                 $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` )
 236                         VALUES( '%s', '%s', '%s') ",
 237                         dbesc($hash),
 238                         dbesc(notags(trim($_GET['dfrn_id']))),
 239                         intval(time() + 60 )
 240                 );
 241
 242                 $r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' AND `blocked` = 0 LIMIT 1",
 243                         dbesc($_GET['dfrn_id']));
 244                 if((! count($r)) || (! strlen($r[0]['prvkey'])))
 245                         $status = 1;
 246
 247                 $challenge = '';
 248
 249                 openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
 250                 $challenge = bin2hex($challenge);
 251                 echo '<?xml version="1.0" encoding="UTF-8"?><dfrn_notify><status>' .$status . '</status><dfrn_id>' . $_GET['dfrn_id'] . '</dfrn_id>'
 252                         . '<challenge>' . $challenge . '</challenge></dfrn_notify>' . "\r\n" ;
 253                 session_write_close();
 254                 exit;
 255
 256         }
 257
 258 }