Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
require_once('simplepie/simplepie.inc');
function get_atom_elements($item) {
$res = array();
$author = $item->get_author();
$res['remote-name'] = $author->get_name();
$res['remote-link'] = $author->get_link();
$res['remote-avatar'] = $author->get_avatar();
$res['remote-id'] = $item->get_id();
$res['title'] = $item->get_title();
$res['body'] = $item->get_content();
if(strlen($res['body']) > 100000)
$res['body'] = substr($res['body'],0,10000) . "\r\n[Extremely large post truncated.]\r\n" ;
$allow = $item->get_item_tags('http://purl.org/macgirvin/dfrn/1.0','comment-allow');
if($allow && $allow[0]['data'] == 1)
$res['last-child'] = 1;
else
$res['last-child'] = 0;
$rawcreated = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'published');
if($rawcreated)
$res['created'] = $rawcreated[0]['data'];
$rawedited = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'updated');
if($rawedited)
$res['edited'] = $rawcreated[0]['data'];
$rawowner = $item->get_item_tags('http://purl.org/macgirvin/dfrn/1.0", 'owner');
if($rawowner[0]['child']['http://purl.org/macgirvin/dfrn/1.0']['name'][0]['data'])
$res['owner-name'] = rawowner[0]['child']['http://purl.org/macgirvin/dfrn/1.0']['name'][0]['data'];
if($rawowner[0]['child']['http://purl.org/macgirvin/dfrn/1.0']['uri'][0]['data'])
$res['owner-link'] = rawowner[0]['child']['http://purl.org/macgirvin/dfrn/1.0']['uri'][0]['data'];
if($rawowner[0]['child']['http://purl.org/macgirvin/dfrn/1.0']['avatar'][0]['data'])
$res['owner-avatar'] = rawowner[0]['child']['http://purl.org/macgirvin/dfrn/1.0']['avatar'][0]['data'];
return $res;
}
function post_remote($arr) {
$arr['hash'] = random_string();
$arr['type'] = 'remote';
$arr['remote-name'] = notags(trim($arr['remote-name']));
$arr['remote-link'] = notags(trim($arr['remote-link']));
$arr['remote-avatar'] = notags(trim($arr['remote-avatar']));
$arr['owner-name'] = notags(trim($arr['owner-name']));
$arr['owner-link'] = notags(trim($arr['owner-link']));
$arr['owner-avatar'] = notags(trim($arr['owner-avatar']));
if(! strlen($arr['remote-avatar']))
$arr['remote-avatar'] = $a->get_baseurl() . '/images/default-profile-sm.jpg';
if(! strlen($arr['owner-avatar']))
$arr['owner-avatar'] = $a->get_baseurl() . '/images/default-profile-sm.jpg';
$arr['created'] = datetime_convert('UTC','UTC',$arr['created'],'Y-m-d H:i:s');
$arr['edited'] = datetime_convert('UTC','UTC',$arr['edited'],'Y-m-d H:i:s');
$arr['title'] = notags(trim($arr['title']));
$arr['body'] = escape_tags(trim($arr['body']));
$arr['last-child'] = intval($arr['last-child']);
$arr['visible'] = 1;
$arr['deleted'] = 0;
$parent = $arr['parent_urn'];
unset($arr['parent_urn']);
$parent_id = 0;
dbesc_array($arr);
$r = q("INSERT INTO `item` (`"
. implode("`, `", array_keys($arr))
. "`) VALUES ('"
. implode("', '", array_values($arr))
. "')" );
$r = q("SELECT `id` FROM `item` WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
dbesc($parent),
intval($arr['uid'])
);
if(count($r))
$parent_id = $r[0]['id'];
$r = q("SELECT `id` FROM `item` WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
$arr['remote-id'],
intval($arr['uid'])
);
if(count($r))
$current_post = $r[0]['id'];
$r = q("UPDATE `item` SET `parent` = %d WHERE `id` = %d LIMIT 1",
intval($parent_id),
intval($current_post)
);
}
function dfrn_notify_post(&$a) {
dbg(3);
$dfrn_id = notags(trim($_POST['dfrn_id']));
$challenge = notags(trim($_POST['challenge']));
$data = $_POST['data'];
$r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
dbesc($dfrn_id),
dbesc($challenge)
);
if(! count($r))
xml_status(3);
$r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
dbesc($dfrn_id),
dbesc($challenge)
);
// find the local user who owns this relationship.
$r = q("SELECT `id`, `uid` FROM `contact` WHERE `issued-id` = '%s' LIMIT 1",
dbesc($dfrn_id)
);
if(! count($r))
xml_status(3);
$importer = $r[0];
$feed = new SimplePie();
$feed->set_raw_data($data);
$feed->enable_order_by_date(false);
$feed->init();
foreach($feed->get_items() as $item) {
$rawdelete = $item->get_item_tags("http://purl.org/atompub/tombstones/1.0", 'deleted-entry');
print_r($rawdelete);
if($deleted) {
// pick out ref and when from attribs
// check hasn't happened already, verify ownership and then process it
continue;
}
$is_reply = false;
$item_id = $item->get_id();
$rawthread = $item->get_item_tags("http://purl.org/syndication/thread/1.0",'in-reply-to');
if(isset($rawthread[0]['attribs']['']['ref'])) {
$is_reply = true;
$parent_urn = $rawthread[0]['attribs']['']['ref'];
}
if($is_reply) {
if($x == ($total_items - 1)) {
// remote reply to our post. Import and then notify everybody else.
}
else {
// regular comment that is part of this total conversation. Have we seen it? If not, import it.
$item_id = $item->get_id();
$r = q("SELECT `uid`, `last-child` FROM `item` WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
dbesc($item_id),
intval($importer['uid'])
);
if(count($r)) {
$allow = $item->get_item_tags('http://purl.org/macgirvin/dfrn/1.0','comment-allow');
if($allow && $allow[0]['data'] != $r[0]['last-child']) {
$r = q("UPDATE `item` SET `last-child` = %d WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
intval($allow[0]['data']),
dbesc($item_id)
);
}
continue;
}
$datarray = get_atom_elements($item);
$datarray['parent_urn'] = $parent_urn;
$datarray['uid'] = $importer['uid'];
$datarray['contact-id'] = $importer['id'];
$r = post_remote($datarray);
continue;
}
}
else {
// Head post of a conversation. Have we seen it? If not, import it.
$item_id = $item->get_id();
$r = q("SELECT `uid` FROM `item` WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
dbesc($item_id),
intval($importer['uid'])
);
if(count($r)) {
$allow = $item->get_item_tags('http://purl.org/macgirvin/dfrn/1.0','comment-allow');
if($allow && $allow[0]['data'] != $r[0]['last-child']) {
$r = q("UPDATE `item` SET `last-child` = %d WHERE `remote-id` = '%s' AND `uid` = %d LIMIT 1",
intval($allow[0]['data']),
dbesc($item_id)
);
}
continue;
}
$datarray = get_atom_elements($item);
$datarray['parent_urn'] = $item_id;
$datarray['uid'] = $importer['uid'];
$datarray['contact-id'] = $importer['id'];
$r = post_remote($datarray);
continue;
}
}
killme();
}
function dfrn_notify_content(&$a) {
if(x($_GET,'dfrn_id')) {
// initial communication from external contact
$hash = random_string();
$status = 0;
$r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
$r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` )
VALUES( '%s', '%s', '%s') ",
dbesc($hash),
dbesc(notags(trim($_GET['dfrn_id']))),
intval(time() + 60 )
);
$r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' AND `blocked` = 0 LIMIT 1",
dbesc($_GET['dfrn_id']));
if((! count($r)) || (! strlen($r[0]['prvkey'])))
$status = 1;
$challenge = '';
openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
$challenge = bin2hex($challenge);
echo '<?xml version="1.0" encoding="UTF-8"?><dfrn_notify><status>' .$status . '</status><dfrn_id>' . $_GET['dfrn_id'] . '</dfrn_id>'
. '<challenge>' . $challenge . '</challenge></dfrn_notify>' . "\r\n" ;
session_write_close();
exit;
}
}