.
 */
if (!defined('LACONICA')) { exit(1); }
require_once('XMPPHP/XMPP.php');
function jabber_valid_base_jid($jid) {
	# Cheap but effective
	return Validate::email($jid);
}
function jabber_normalize_jid($jid) {
	if (preg_match("/(?:([^\@]+)\@)?([^\/]+)(?:\/(.*))?$/", $jid, $matches)) {
		$node = $matches[1];
		$server = $matches[2];
		return strtolower($node.'@'.$server);
	} else {
		return NULL;
	}
}
function jabber_daemon_address() {
	return common_config('xmpp', 'user') . '@' . common_config('xmpp', 'server');
}
function jabber_connect($resource=NULL) {
	static $conn = NULL;
	if (!$conn) {
		$conn = new XMPPHP_XMPP(common_config('xmpp', 'host') ?
								common_config('xmpp', 'host') :
								common_config('xmpp', 'server'),
								common_config('xmpp', 'port'),
								common_config('xmpp', 'user'),
								common_config('xmpp', 'password'),
								($resource) ? $resource :
								common_config('xmpp', 'resource'),
								common_config('xmpp', 'server'),
								common_config('xmpp', 'debug') ?
								true : false,
								common_config('xmpp', 'debug') ?
								XMPPHP_Log::LEVEL_VERBOSE :  NULL
								);
		if (!$conn) {
			return false;
		}
		$conn->autoSubscribe();
		$conn->useEncryption(common_config('xmpp', 'encryption'));
		try {
			$conn->connect(true); # true = persistent connection
		} catch (XMPPHP_Exception $e) {
			common_log(LOG_ERROR, $e->getMessage());
			return false;
		}
    	$conn->processUntil('session_start');
	}
	return $conn;
}
function jabber_send_notice($to, $notice) {
	$conn = jabber_connect();
	if (!$conn) {
		return false;
	}
	$profile = Profile::staticGet($notice->profile_id);
	if (!$profile) {
		common_log(LOG_WARNING, 'Refusing to send notice with ' .
		           'unknown profile ' . common_log_objstring($notice),
		           __FILE__);
		return false;
	}
	$msg = jabber_format_notice($profile, $notice);
	$entry = jabber_format_entry($profile, $notice);
	$conn->message($to, $msg, 'chat', NULL, $entry);
	$profile->free();
	return true;
}
# Extra stuff defined by Twitter, needed by twitter clients
function jabber_format_entry($profile, $notice) {
	# FIXME: notice url might be remote
	$noticeurl = common_local_url('shownotice',
								  array('notice' => $notice->id));
	$msg = jabber_format_notice($profile, $notice);
	$entry = "\n\n";
	$entry .= "\n";
	$entry .= "" . $profile->nickname . " - " . common_config('site', 'name') . "\n";
	$entry .= "\n";
	$entry .= " $profile->nickname)) . "'/>\n";
	$entry .= "" . $profile->nickname . "\n";
	$entry .= "" . common_profile_avatar_url($profile, AVATAR_PROFILE_SIZE) . "\n";
	$entry .= "\n";
	$entry .= "" . htmlspecialchars($msg) . "\n";
	$entry .= "" . htmlspecialchars($msg) . "\n";
	$entry .= "\n";
	$entry .= "". $notice->uri . "\n";
	$entry .= "".common_date_w3dtf($notice->created)."\n";
	$entry .= "".common_date_w3dtf($notice->modified)."\n";
	$entry .= "\n";
	$html = "\n\n";
	$html .= "
\n";
	$html .= "".$profile->nickname.": ";
	$html .= ($notice->rendered) ? $notice->rendered : common_render_content($notice->content, $notice);
	$html .= "\n\n";
	$html .= "\n\n";
	$address = "\n";
	$address .= "\n";
	$address .= "\n";
	# FIXME: include a pubsub event, too.
	return $html . $entry . $address;
}
function jabber_send_message($to, $body, $type='chat', $subject=NULL) {
	$conn = jabber_connect();
	if (!$conn) {
		return false;
	}
	$conn->message($to, $body, $type, $subject);
	return true;
}
function jabber_send_presence($status, $show='available', $to=NULL,
							  $type = 'available', $priority=NULL)
{
	$conn = jabber_connect();
	if (!$conn) {
		return false;
	}
	$conn->presence($status, $show, $to, $type, $priority);
	return true;
}
function jabber_confirm_address($code, $nickname, $address) {
	$body = 'User "' . $nickname . '" on ' . common_config('site', 'name') . ' ' .
			'has said that your Jabber ID belongs to them. ' .
    	    'If that\'s true, you can confirm by clicking on this URL: ' .
        	common_local_url('confirmaddress', array('code' => $code)) .
        	' . (If you cannot click it, copy-and-paste it into the ' .
        	'address bar of your browser). If that user isn\'t you, ' .
        	'or if you didn\'t request this confirmation, just ignore this message.';
	return jabber_send_message($address, $body);
}
function jabber_special_presence($type, $to=NULL, $show=NULL, $status=NULL) {
	$conn = jabber_connect();
	$to = htmlspecialchars($to);
	$status = htmlspecialchars($status);
	$out = "send($out);
}
function jabber_broadcast_notice($notice) {
	if (!common_config('xmpp', 'enabled')) {
		return true;
	}
	$profile = Profile::staticGet($notice->profile_id);
	if (!$profile) {
		common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
		           'unknown profile ' . common_log_objstring($notice),
		           __FILE__);
		return false;
	}
	$msg = jabber_format_notice($profile, $notice);
	$entry = jabber_format_entry($profile, $notice);
	$profile->free();
	unset($profile);
	
	$sent_to = array();
	$conn = jabber_connect();
	# First, get users to whom this is a direct reply
	$user = new User();
	$user->query('SELECT user.id, user.jabber ' .
				 'FROM user JOIN reply ON user.id = reply.profile_id ' .
				 'WHERE reply.notice_id = ' . $notice->id . ' ' .
				 'AND user.jabber is not null ' .
				 'AND user.jabbernotify = 1 ' .
				 'AND user.jabberreplies = 1 ');
	while ($user->fetch()) {
		common_log(LOG_INFO,
				   'Sending reply notice ' . $notice->id . ' to ' . $user->jabber,
				   __FILE__);
		$conn->message($user->jabber, $msg, 'chat', NULL, $entry);
		$conn->processTime(0);
		$sent_to[$user->id] = 1;
	}
	$user->free();
	
    # Now, get users subscribed to this profile
	$user = new User();
	$user->query('SELECT user.id, user.jabber ' .
				 'FROM user JOIN subscription ON user.id = subscription.subscriber ' .
				 'WHERE subscription.subscribed = ' . $notice->profile_id . ' ' .
				 'AND user.jabber is not null ' .
				 'AND user.jabbernotify = 1 ');
	while ($user->fetch()) {
		if (!array_key_exists($user->id, $sent_to)) {
			common_log(LOG_INFO,
					   'Sending notice ' . $notice->id . ' to ' . $user->jabber,
					   __FILE__);
			$conn->message($user->jabber, $msg, 'chat', NULL, $entry);
			# To keep the incoming queue from filling up, we service it after each send.
			$conn->processTime(0);
		}
	}
	$user->free();
	
	return true;
}
function jabber_public_notice($notice) {
	# Now, users who want everything
	$public = common_config('xmpp', 'public');
	# FIXME PRIV don't send out private messages here
	# XXX: should we send out non-local messages if public,localonly
	# = false? I think not
	if ($public && $notice->is_local) {
		$profile = Profile::staticGet($notice->profile_id);
		if (!$profile) {
			common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
					   'unknown profile ' . common_log_objstring($notice),
					   __FILE__);
			return false;
		}
		$msg = jabber_format_notice($profile, $notice);
		$entry = jabber_format_entry($profile, $notice);
		$conn = jabber_connect();
		foreach ($public as $address) {
			common_log(LOG_INFO,
					   'Sending notice ' . $notice->id . ' to public listener ' . $address,
					   __FILE__);
			$conn->message($address, $msg, 'chat', NULL, $entry);
			$conn->processTime(0);
		}
		$profile->free();
	}
	return true;
}
function jabber_format_notice(&$profile, &$notice) {
	return $profile->nickname . ': ' . $notice->content;
}