#!/usr/bin/perl

=head1 NAME

ircu - Plugin to graph the number of clients, channels and servers on
an IRC network.

=head1 CONFIGURATION

No configuration.

=head1 USAGE

This plugin connects to an IRC server running on the local host.

=head1 AUTHOR

Unknown author

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

  #%# family=manual
  #%# capabilities=autoconf

=cut

my $ret = undef;

if (! eval "require Net::IRC;")
{
    $ret = "Net::IRC not found";
}

if ($ARGV[0] and $ARGV[0] eq "autoconf")
{
    if ($ret)
    {
	print "no ($ret)\n";
	exit 0;
    }
    my $irc = new Net::IRC;
    my $conn;

    $irc = new Net::IRC; $conn = $irc->newconn(Nick => 'munin-ircd', Server => 'localhost');
    if (!$conn)
    {
	print "no (Couldn't connect to IRC server)\n";
	exit 0;
    }
    print "yes\n";
    exit 0;
}

if($ARGV[0] and $ARGV[0] eq "config") {
    print "host_name $ENV{FQDN}\n";
    print "graph_title ircd status\n";
    print "graph_order clients channels servers\n";
    print "graph_category chat\n";
    print "graph_args -l 0\n";
    print "clients.label clients\n";
    print "clients.draw LINE2\n";
    print "channels.label channels\n";
    print "channels.draw LINE2\n";
    print "servers.label servers\n";
    print "servers.draw LINE2\n";
    exit 0;
}

my $irc = new Net::IRC;
my $conn = $irc->newconn(Nick => 'munin-ircd',
			 Server => 'localhost');

my %result;
#$conn->debug(0);

sub luserclient {
    my($self, $event) = @_;
    # Do we have something like an UnrealIRCD?
    if(($event->args)[1] =~  /There are (\d+) users and (\d+) invisible on (\d+) servers/) {
	$result{'clients'} = $1 + $2 - 1; # don't count this script
	$result{'servers'} = $3;
    }
    # Or maybe some freendode hyperion stuff?
    elsif(($event->args)[1] =~  /There are (\d+) listed and (\d+) unlisted users on (\d+) servers/) {
	$result{'clients'} = $1 + $2 - 1; # don't count this script
	$result{'servers'} = $3;
    }
    # Or some recent ircnet ircd?
    elsif(($event->args)[1] =~  /There are (\d+) users and \d+ services on (\d+) servers/) {
	$result{'clients'} = $1 - 1; # don't count this script
	$result{'servers'} = $2;
    }
    # Anything else goes here
    elsif(($event->args)[1] =~  /There are (\d+) users and (\d+) invisible/) {
	$result{'clients'} = $1 + $2 - 1; # don't count this script
    }
    # And here (if there are no invisible count)
    elsif(($event->args)[1] =~  /There are (\d+) users/) {
	$result{'clients'} = $1 - 1; # don't count this script
    }
}

sub luserchannels {
    my($self, $event) = @_;
    if(($event->args)[1] =~  /^(\d+)/) {
	$result{'channels'} = $1;
    }
}

sub quit {
    my($self, $event) = @_;
    open(STDERR, ">/dev/null");
    $self->quit();
    print "clients.value " . $result{'clients'} . "\n";
    print "channels.value " . $result{'channels'} . "\n";
    print "servers.value " . $result{'servers'} . "\n";
}

$conn->add_global_handler('endofmotd', \&quit);
$conn->add_global_handler('luserclient', \&luserclient);
$conn->add_global_handler('luserchannels', \&luserchannels);


while(1) {
    $irc->do_one_loop();
}