2 # module to manage channel lists & data
4 # This is the base class for all channel operations, which is everything to do
5 # with input and output really.
7 # The instance variable in the outside world will be generally be called $dxchann
9 # This class is 'inherited' (if that is the goobledegook for what I am doing)
10 # by various other modules. The point to understand is that the 'instance variable'
11 # is in fact what normal people would call the state vector and all useful info
12 # about a connection goes in there.
14 # Another point to note is that a vector may contain a list of other vectors.
15 # I have simply added another variable to the vector for 'simplicity' (or laziness
16 # as it is more commonly called)
18 # PLEASE NOTE - I am a C programmer using this as a method of learning perl
19 # firstly and OO about ninthly (if you don't like the design and you can't
20 # improve it with better OO by make it smaller and more efficient, then tough).
22 # Copyright (c) 1998 - Dirk Koopman G1TLH
36 conn => 'Msg Connection ref',
40 state => 'Current State',
41 oldstate => 'Last State',
42 list => 'Dependant DXChannels list',
47 # create a new connection object [$obj = DXChannel->new($call, $msg_conn_obj, $user_obj)]
50 my ($pkg, $call, $conn, $user) = @_;
53 die "trying to create a duplicate channel for $call" if $channels{$call};
54 $self->{call} = $call;
55 $self->{conn} = $conn if defined $conn; # if this isn't defined then it must be a list
56 $self->{user} = $user if defined $user;
59 $self->{oldstate} = 0;
61 return $channels{$call} = $self;
64 # obtain a connection object by callsign [$obj = DXChannel->get($call)]
67 my ($pkg, $call) = @_;
68 return $connect{$call};
71 # obtain all the connection objects
75 return values(%channels);
78 # obtain a connection object by searching for its connection reference
81 my ($pkg, $conn) = @_;
84 foreach $self (values(%channels)) {
85 return $self if ($self->{conn} == $conn);
90 # get rid of a connection object [$obj->del()]
94 delete $channels{$self->{call}};
98 # handle out going messages, immediately without waiting for the select to drop
99 # this could, in theory, block
103 my $conn = $self->{conn};
105 # is this a list of channels ?
106 if (!defined $conn) {
107 die "tried to send_now to an invalid channel list" if !defined $self->{list};
109 foreach $lself (@$self->{list}) {
110 $lself->send_now(@_); # it's recursive :-)
114 my $call = $self->{call};
120 print main::DEBUG "$t -> $sort $call $line\n" if defined DEBUG;
121 print "-> $sort $call $line\n";
122 $conn->send_now("$sort$call|$line");
128 # the normal output routine
130 sub send # this is always later and always data
133 my $conn = $self->{conn};
135 # is this a list of channels ?
136 if (!defined $conn) {
137 die "tried to send to an invalid channel list" if !defined $self->{list};
139 foreach $lself (@$self->{list}) {
140 $lself->send(@_); # here as well :-) :-)
143 my $call = $self->{call};
149 print main::DEBUG "$t -> D $call $line\n" if defined DEBUG;
150 print "-> D $call $line\n";
151 $conn->send_later("D$call|$line");
156 # send a file (always later)
159 my ($self, $fn) = @_;
160 my $call = $self->{call};
161 my $conn = $self->{conn};
164 open(F, $fn) or die "can't open $fn for sending file ($!)";
170 # just a shortcut for $dxchan->send(msg(...));
174 $self->send(DXM::msg(@_));
177 # change the state of the channel - lots of scope for debugging here :-)
181 $self->{oldstate} = $self->{state};
182 $self->{state} = shift;
183 print "Db $self->{call} channel state $self->{oldstate} -> $self->{state}\n" if $main::debug;
186 # various access routines
190 my $name = $AUTOLOAD;
192 return if $name =~ /::DESTROY$/;
195 die "Non-existant field '$AUTOLOAD'" if !$valid{$name};
196 @_ ? $self->{$name} = shift : $self->{$name} ;