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 $dxchann
9 # This class is 'inherited' (if that is the goobledegook for what I am doing)
10 # by various other modules. The point to understand is that the 'instance variable'
11 # is in fact what normal people would call the state vector and all useful info
12 # about a connection goes in there.
14 # Another point to note is that a vector may contain a list of other vectors.
15 # I have simply added another variable to the vector for 'simplicity' (or laziness
16 # as it is more commonly called)
18 # PLEASE NOTE - I am a C programmer using this as a method of learning perl
19 # firstly and OO about ninthly (if you don't like the design and you can't
20 # improve it with better OO by make it smaller and more efficient, then tough).
22 # Copyright (c) 1998 - Dirk Koopman G1TLH
29 @ISA = qw(DXCommandmode DXProt Exporter);
37 # create a new connection object [$obj = DXChannel->new($call, $msg_conn_obj, $user_obj)]
40 my ($pkg, $call, $conn, $user) = @_;
43 die "trying to create a duplicate channel for $call" if $channels{$call};
44 $self->{call} = $call;
45 $self->{conn} = $conn if defined $conn; # if this isn't defined then it must be a list
46 $self->{user} = $user if defined $user;
49 $self->{oldstate} = 0;
51 return $channels{$call} = $self;
54 # obtain a connection object by callsign [$obj = DXChannel->get($call)]
57 my ($pkg, $call) = @_;
58 return $connect{$call};
61 # obtain all the connection objects
65 return values(%channels);
68 # obtain a connection object by searching for its connection reference
71 my ($pkg, $conn) = @_;
74 foreach $self (values(%channels)) {
75 return $self if ($self->{conn} == $conn);
80 # get rid of a connection object [$obj->del()]
84 delete $channels{$self->{call}};
88 # handle out going messages, immediately without waiting for the select to drop
89 # this could, in theory, block
93 my $conn = $self->{conn};
95 # is this a list of channels ?
97 die "tried to send_now to an invalid channel list" if !defined $self->{list};
99 foreach $lself (@$self->{list}) {
100 $lself->send_now(@_); # it's recursive :-)
104 my $call = $self->{call};
110 print main::DEBUG "$t -> $sort $call $line\n" if defined DEBUG;
111 print "-> $sort $call $line\n";
112 $conn->send_now("$sort$call|$line");
118 # the normal output routine
120 sub send # this is always later and always data
123 my $conn = $self->{conn};
125 # is this a list of channels ?
126 if (!defined $conn) {
127 die "tried to send to an invalid channel list" if !defined $self->{list};
129 foreach $lself (@$self->{list}) {
130 $lself->send(@_); # here as well :-) :-)
133 my $call = $self->{call};
139 print main::DEBUG "$t -> D $call $line\n" if defined DEBUG;
140 print "-> D $call $line\n";
141 $conn->send_later("D$call|$line");
146 # send a file (always later)
149 my ($self, $fn) = @_;
150 my $call = $self->{call};
151 my $conn = $self->{conn};
154 open(F, $fn) or die "can't open $fn for sending file ($!)";
160 # just a shortcut for $dxchan->send(msg(...));
164 $self->send(DXM::msg(@_));
167 # change the state of the channel - lots of scope for debugging here :-)
171 $self->{oldstate} = $self->{state};
172 $self->{state} = shift;
173 print "Db $self->{call} channel state $self->{oldstate} -> $self->{state}\n" if $main::debug;