function rss2rdf($post_data)
{
// Function to convert RSS to RDF, some elements as tags will be missing
//@FIXME: this solution is a bit hackish
$post_data = str_replace('dc:date', 'dc_date', $post_data);
// Parsing the new feeds to load in the triple store
$xml = simplexml_load_string($post_data);
if (count($xml) == 0) {
return;
}
error_log("DEBUG: xml received from publisher: " . print_r($xml, 1), 0);
foreach ($xml->item as $item) {
$link = (string) $item->link;
$date = (string) $item->dc_date;
$description = (string) $item->description;
$site = SMOBTools::host($link);
$author = $site . "/me";
$query = "INSERT INTO <{$link}> {\n <{$site}> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://smob.me/ns#Hub> .\n <{$link}> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://rdfs.org/sioc/types#MicroblogPost> .\n <{$link}> <http://rdfs.org/sioc/ns#has_container> <{$site}> .\n <{$link}> <http://rdfs.org/sioc/ns#has_creator> <{$author}> .\n <{$link}> <http://xmlns.com/foaf/0.1/maker> <{$author}#id> .\n <{$link}> <http://purl.org/dc/terms/created> \"{$date}\"^^<http://www.w3.org/2001/XMLSchema#dateTime> .\n <{$link}> <http://purl.org/dc/terms/title> \"Update - {$date}\"^^<http://www.w3.org/2001/XMLSchema#string> .\n <{$link}> <http://rdfs.org/sioc/ns#content> \"{$description}\"^^<http://www.w3.org/2001/XMLSchema#string> .\n <{$link}#presence> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://online-presence.net/opo/ns#OnlinePresence> .\n <{$link}#presence> <http://online-presence.net/opo/ns#declaredOn> <{$author}> .\n <{$link}#presence> <http://online-presence.net/opo/ns#declaredBy> <{$author}#id> .\n <{$link}#presence> <http://online-presence.net/opo/ns#StartTime> \"{$date}\"^^<http://www.w3.org/2001/XMLSchema#dateTime> .\n <{$link}#presence> <http://online-presence.net/opo/ns#customMessage> <{$link}> . }";
SMOBStore::query($query);
error_log("DEBUG: Added the triples: {$query}", 0);
}
}
$remote_user = $u;
$local_user = SMOBTools::user_uri();
$follow = "<{$remote_user}> sioc:follows <{$local_user}> . ";
$local = "DELETE FROM <" . SMOB_ROOT . "data/followers> { {$follow} }";
SMOBStore::query($local);
error_log("DEBUG: Removed follower {$remote_user} with the query: {$local}", 0);
} elseif ($t == 'following') {
$remote_user = $u;
$local_user = SMOBTools::user_uri();
$follow = "<{$local_user}> sioc:follows <{$remote_user}> . ";
$local = "DELETE FROM <" . SMOB_ROOT . "data/followings> { {$follow} }";
SMOBStore::query($local);
error_log("DEBUG: Removed following {$remote_user} with the query: {$local}", 0);
// And ping to update the followers list remotely
//$ping = str_replace("me","remove", $u)."/follower/$local_user";
$ping = SMOBTools::host($u) . "/remove/follower/{$local_user}";
error_log("DEBUG: Sent {$ping}", 0);
$result = SMOBTools::do_curl($ping);
error_log("DEBUG: Server answer: " . join(' ', $result), 0);
// Unsubscribe to the Hub
//@TODO: following Hub should be stored?,
$remote_user_feed = $remote_user . FEED_URL_PATH;
$xml = simplexml_load_file($remote_user_feed);
if (count($xml) == 0) {
return;
}
$link_attributes = $xml->channel->link->attributes();
if ($link_attributes['rel'] == 'hub') {
$hub_url = $link_attributes['href'];
}
$callback_url = urlencode(SMOB_ROOT . "callback");
