moan about and then delete empty message files

[spider.git] / perl / DXCluster.pm

#
# DX database control routines
#
# This manages the on-line cluster user 'database'
#
# This should all be pretty trees and things, but for now I
# just can't be bothered. If it becomes an issue I shall
# address it.
#
# Copyright (c) 1998 - Dirk Koopman G1TLH
#
# $Id$
#

package DXCluster;

use DXDebug;
use DXUtil;

use strict;
use vars qw(%cluster %valid);

%cluster = ();                                  # this is where we store the dxcluster database

%valid = (
                  mynode => '0,Parent Node,DXCluster::showcall',
                  call => '0,Callsign',
                  confmode => '0,Conference Mode,yesno',
                  here => '0,Here?,yesno',
                  dxchan => '5,Channel ref,DXCluster::showcall',
                  pcversion => '5,Node Version',
                  list => '5,User List,DXCluster::dolist',
                  users => '0,No of Users',
                 );

sub alloc
{
        my ($pkg, $dxchan, $call, $confmode, $here) = @_;
        die "$call is already alloced" if $cluster{$call};
        my $self = {};
        $self->{call} = $call;
        $self->{confmode} = $confmode;
        $self->{here} = $here;
        $self->{dxchan} = $dxchan;

        $cluster{$call} = bless $self, $pkg;
        return $self;
}

# get an entry exactly as it is
sub get_exact
{
        my ($pkg, $call) = @_;

        # belt and braces
        $call = uc $call;
  
        # search for 'as is' only
        return $cluster{$call}; 
}

#
# search for a call in the cluster
# taking into account SSIDs
#
sub get
{
        my ($pkg, $call) = @_;

        # belt and braces
        $call = uc $call;
  
        # search for 'as is'
        my $ref = $cluster{$call}; 
        return $ref if $ref;

        # search for the unSSIDed one
        $call =~ s/-\d+$//o;
        $ref = $cluster{$call};
        return $ref if $ref;
  
        # search for the SSIDed one
        my $i;
        for ($i = 1; $i < 17; $i++) {
                $ref = $cluster{"$call-$i"};
                return $ref if $ref;
        }
        return undef;
}

# get all 
sub get_all
{
        return values(%cluster);
}

# return a prompt for a field
sub field_prompt
{ 
        my ($self, $ele) = @_;
        return $valid{$ele};
}
#
# return a list of valid elements 
# 

sub fields
{
        return keys(%valid);
}

# this expects a reference to a list in a node NOT a ref to a node 
sub dolist
{
        my $self = shift;
        my $out;
        my $ref;
  
        foreach my $call (keys %{$self}) {
                $ref = $$self{$call};
                my $s = $ref->{call};
                $s = "($s)" if !$ref->{here};
                $out .= "$s ";
        }
        chop $out;
        return $out;
}

# this expects a reference to a node 
sub showcall
{
        my $self = shift;
        return $self->{call};
}

# the answer required by show/cluster
sub cluster
{
        my $users = DXCommandmode::get_all();
        my $uptime = main::uptime();
        my $tot = $DXNode::users;
                
        return " $DXNode::nodes nodes, $users local / $tot total users  Max users $DXNode::maxusers  Uptime $uptime";
}

no strict;
sub AUTOLOAD
{
        my $self = shift;
        my $name = $AUTOLOAD;
  
        return if $name =~ /::DESTROY$/;
        $name =~ s/.*:://o;
  
        confess "Non-existant field '$AUTOLOAD'" if !$valid{$name};
        # this clever line of code creates a subroutine which takes over from autoload
        # from OO Perl - Conway
        *{$AUTOLOAD} = sub {@_ > 1 ? $_[0]->{$name} = $_[1] : $_[0]->{$name}} ;
        @_ ? $self->{$name} = shift : $self->{$name} ;
}

#
# USER special routines
#

package DXNodeuser;

@ISA = qw(DXCluster);

use DXDebug;

use strict;

sub new 
{
        my ($pkg, $dxchan, $node, $call, $confmode, $here) = @_;

        die "tried to add $call when it already exists" if DXCluster->get_exact($call);
  
        my $self = $pkg->alloc($dxchan, $call, $confmode, $here);
        $self->{mynode} = $node;
        $node->add_user($call, $self);
        dbg('cluster', "allocating user $call to $node->{call} in cluster\n");
        return $self;
}

sub del
{
        my $self = shift;
        my $call = $self->{call};
        my $node = $self->{mynode};

        $node->del_user($call);
        dbg('cluster', "deleting user $call from $node->{call} in cluster\n");
}

sub count
{
        return $DXNode::users;          # + 1 for ME (naf eh!)
}

no strict;

#
# NODE special routines
#

package DXNode;

@ISA = qw(DXCluster);

use DXDebug;

use strict;
use vars qw($nodes $users $maxusers);

$nodes = 0;
$users = 0;
$maxusers = 0;


sub new 
{
        my ($pkg, $dxchan, $call, $confmode, $here, $pcversion) = @_;
        my $self = $pkg->alloc($dxchan, $call, $confmode, $here);
        $self->{pcversion} = $pcversion;
        $self->{list} = { } ;
        $self->{mynode} = $self;        # for sh/station
        $self->{users} = 0;
        $nodes++;
        dbg('cluster', "allocating node $call to cluster\n");
        return $self;
}

# get all the nodes
sub get_all
{
        my $list;
        my @out;
        foreach $list (values(%DXCluster::cluster)) {
                push @out, $list if $list->{pcversion};
        }
        return @out;
}

sub del
{
        my $self = shift;
        my $call = $self->{call};
        my $ref;

        # delete all the listed calls
        foreach $ref (values %{$self->{list}}) {
                $ref->del();                    # this also takes them out of this list
        }
        delete $DXCluster::cluster{$call}; # remove me from the cluster table
        dbg('cluster', "deleting node $call from cluster\n"); 
        $users -= $self->{users};    # it may be PC50 updated only therefore > 0
        $users = 0 if $users < 0;
        $nodes--;
        $nodes = 0 if $nodes < 0;
}

sub add_user
{
        my $self = shift;
        my $call = shift;
        my $ref = shift;
        
        $self->{list}->{$call} = $ref; # add this user to the list on this node
        $self->{users} = keys %{$self->{list}};
        $users++;
        $maxusers = $users+$nodes if $users+$nodes > $maxusers;
}

sub del_user
{
        my $self = shift;
        my $call = shift;

        delete $self->{list}->{$call};
        delete $DXCluster::cluster{$call}; # remove me from the cluster table
        $self->{users} = keys %{$self->{list}};
        $users--;
        $users = 0, warn "\$users gone neg, reset" if $users < 0;
        $maxusers = $users+$nodes if $users+$nodes > $maxusers;
}

sub update_users
{
        my $self = shift;
        my $count = shift;
        $count = 0 unless $count;
        
        $users -= $self->{users};
        $self->{users} = $count unless keys %{$self->{list}};
        $users += $self->{users};
        $maxusers = $users+$nodes if $users+$nodes > $maxusers;
}

sub count
{
        return $nodes;                          # + 1 for ME!
}

sub dolist
{

}

sub DESTROY
{
        my $self = shift;
        undef $self->{list} if $self->{list};
}


1;
__END__