add more routing code together with associated commands

[spider.git] / perl / Route / Node.pm

diff --git a/perl/Route/Node.pm b/perl/Route/Node.pm
index 2fee0acd40042365d5d494679c6b8cc6ac2aa435..9e1f3c04fecf7ba100ca35ed4c5594dc82578e91 100644 (file)
--- a/perl/Route/Node.pm
+++ b/perl/Route/Node.pm
@@ -10,35 +10,158 @@ package Route::Node;
 
 use DXDebug;
 use Route;
+use Route::User;
 
 use strict;
 
-use vars qw(%list %valid @ISA $me);
+use vars qw(%list %valid @ISA $max);
 @ISA = qw(Route);
 
 %valid = (
-                 dxchancall => '0,DXChannel Calls,parray',
                  parent => '0,Parent Calls,parray',
+                 nodes => '0,Nodes,parray',
+                 users => '0,Users,parray',
                  version => '0,Version',
 );
 
 %list = ();
+$max = 0;
 
-sub init
+sub count
 {
-       $me = Route::Node->new(@_);
+       my $n = scalar %list;
+       $max = $n if $n > $max;
+       return $n;
+}
+
+sub max
+{
+       return $max;
+}
+
+#
+# this routine handles the possible adding of an entry in the routing
+# table. It will only add an entry if it is new. It may have all sorts of
+# other side effects which may include fixing up other links.
+#
+# It will return a node object if (and only if) it is a completely new
+# object with that callsign. The upper layers are expected to do something
+# sensible with this!
+#
+# called as $parent->add(call, dxchan, version, flags) 
+#
+
+sub add
+{
+       my $parent = shift;
+       my $call = uc shift;
+       my $self = get($call);
+       if ($self) {
+               $self->_addparent($parent->{call});
+               return undef;
+       }
+       $parent->_addnode($call);
+       $self = $parent->new($call, @_);
+       return $self;
+}
+
+#
+# this routine is the opposite of 'add' above.
+#
+# It will return an object if (and only if) this 'del' will remove
+# this object completely
+#
+
+sub del
+{
+       my $self = shift;
+       my $pref = shift;
+
+       # delete parent from this call's parent list
+       my $pcall = $pref->{call};
+       my $ref = $self->_delparent($pcall);
+       my @nodes;
+       
+       # is this the last connection?
+       $self->_del_users;
+       unless (@$ref) {
+               push @nodes, $self->del_nodes;
+               delete $list{$self->{call}};
+       }
+       push @nodes, $self;
+       return @nodes;
+}
+
+
+sub _del_users
+{
+       my $self = shift;
+       for (@{$self->{users}}) {
+               my $ref = Route::User::get($_);
+               $ref->del($self) if $ref;
+       }
+       $self->{users} = [];
+}
+
+# remove all sub nodes from this parent
+sub del_nodes
+{
+       my $self = shift;
+       my @nodes;
+       
+       for (@{$self->{nodes}}) {
+               next if $self->{call} eq $_;
+               push @nodes, $self->del_node($_);
+       }
+       return @nodes;
+}
+
+# add a user to this node
+sub add_user
+{
+       my $self = shift;
+       my $ucall = shift;
+       $self->_adduser($ucall);
+       
+       my $uref = Route::User::get($ucall);
+       return $uref ? () : (Route::User->new($ucall, $self->{call}, @_));
+}
+
+# delete a user from this node
+sub del_user
+{
+       my $self = shift;
+       my $ucall = shift;
+       my $ref = Route::User::get($ucall);
+       $self->_deluser($ucall);
+       return ($ref->del($self)) if $ref;
+       return ();
+}
+
+# delete a node from this node (ie I am a parent) 
+sub del_node
+{
+       my $self = shift;
+       my $ncall = shift;
+    $self->_delnode($ncall);
+       my $ref = get($ncall);
+       return ($ref->del($self)) if $ref;
+       return ();
 }
 
 sub new
 {
        my $pkg = shift;
        my $call = uc shift;
+       
        confess "already have $call in $pkg" if $list{$call};
        
        my $self = $pkg->SUPER::new($call);
-       $self->{dxchancall} = [ ];
-       $self->{parent} = [ ];
+       $self->{parent} = ref $pkg ? [ $pkg->{call} ] : [ ];
        $self->{version} = shift;
+       $self->{flags} = shift;
+       $self->{users} = [];
+       $self->{nodes} = [];
        
        $list{$call} = $self;
        
@@ -52,28 +175,73 @@ sub get
        return $list{uc $call};
 }
 
-sub adddxchan
+sub _addparent
 {
        my $self = shift;
-    $self->_addlist('dxchancall', @_);
+    return $self->_addlist('parent', @_);
 }
 
-sub deldxchan
+sub _delparent
 {
        my $self = shift;
-    $self->_dellist('dxchancall', @_);
+    return $self->_dellist('parent', @_);
 }
 
-sub addparent
+
+sub _addnode
 {
        my $self = shift;
-    $self->_addlist('parent', @_);
+    return $self->_addlist('nodes', @_);
 }
 
-sub delparent
+sub _delnode
 {
        my $self = shift;
-    $self->_dellist('parent', @_);
+    return $self->_dellist('nodes', @_);
+}
+
+
+sub _adduser
+{
+       my $self = shift;
+    return $self->_addlist('users', @_);
+}
+
+sub _deluser
+{
+       my $self = shift;
+    return $self->_dellist('users', @_);
+}
+
+sub DESTROY
+{
+       my $self = shift;
+       my $pkg = ref $self;
+       my $call = $self->{call} || "Unknown";
+       
+       dbg('route', "destroying $pkg with $call");
+}
+
+#
+# generic AUTOLOAD for accessors
+#
+
+sub AUTOLOAD
+{
+       no strict;
+
+       my $self = shift;
+       $name = $AUTOLOAD;
+       return if $name =~ /::DESTROY$/;
+       $name =~ s/.*:://o;
+  
+       confess "Non-existant field '$AUTOLOAD'" unless $valid{$name} || $Route::valid{$name};
+
+       # this clever line of code creates a subroutine which takes over from autoload
+       # from OO Perl - Conway
+#      print "AUTOLOAD: $AUTOLOAD\n";
+#      *{$AUTOLOAD} = sub {my $self = shift; @_ ? $self->{$name} = shift : $self->{$name}} ;
+    @_ ? $self->{$name} = shift : $self->{$name} ;
 }
 
 1;