+#
+# the DX command
+#
+# this is where the fun starts!
+#
+# Copyright (c) 1998 Dirk Koopman G1TLH
+#
+# $Id$
+#
+
+my ($self, $line) = @_;
+my @f = split /\s+/, $line;
+my $spotter = $self->call;
+my $spotted;
+my $freq;
+my @out;
+my $valid = 0;
+
+# do we have at least two args?
+return (1, $self->msg('dx2')) unless @f >= 2;
+
+# as a result of a suggestion by Steve K9AN, I am changing the syntax of
+# 'spotted by' things to "dx by g1tlh <freq> <call>" <freq> and <call>
+# can be in any order
+
+if ($f[0] =~ /^by$/i) {
+ $spotter = uc $f[1];
+ $line =~ s/^\s*$f[0]\s+$f[1]\s+//;
+ shift @f;
+ shift @f;
+ return (1, $self->msg('dx2')) unless @f >= 2;
+}
+
+# get the freq and callsign either way round
+if ($f[0] =~ /[A-Za-z]/) {
+ $spotted = uc $f[0];
+ $freq = $f[1];
+} elsif ($f[0] =~ /^[0-9\.\,]+$/) {
+ $freq = $f[0];
+ $spotted = uc $f[1];
+} else {
+ return (1, $self->msg('dx2'));
+}
+$line =~ s/^$f[0]\s+$f[1]\s*//;
+
+# bash down the list of bands until a valid one is reached
+my $bandref;
+my @bb;
+my $i;
+
+# first in KHz
+L1:
+foreach $bandref (Bands::get_all()) {
+ @bb = @{$bandref->band};
+ for ($i = 0; $i < @bb; $i += 2) {
+ if ($freq >= $bb[$i] && $freq <= $bb[$i+1]) {
+ $valid = 1;
+ last L1;
+ }
+ }
+}
+
+unless ($valid) {
+
+ # try again in MHZ
+ $freq = $freq * 1000 if $freq;
+
+ L2:
+ foreach $bandref (Bands::get_all()) {
+ @bb = @{$bandref->band};
+ for ($i = 0; $i < @bb; $i += 2) {
+ if ($freq >= $bb[$i] && $freq <= $bb[$i+1]) {
+ $valid = 1;
+ last L2;
+ }
+ }
+ }
+}
+
+
+push @out, $self->msg('dx1', $freq) unless $valid;
+
+# check we have a callsign :-)
+if ($spotted le ' ') {
+ push @out, $self->msg('dx2');
+
+ $valid = 0;
+}
+
+return (1, @out) unless $valid;
+
+# change ^ into : for transmission
+$line =~ s/\^/:/og;
+
+# Store it here (but only if it isn't baddx)
+if (grep $_ eq $spotted, @DXProt::baddx) {
+ my $buf = Spot::formatb($freq, $spotted, $main::systime, $line, $spotter);
+ push @out, $buf;
+} else {
+ my @spot = Spot::add($freq, $spotted, $main::systime, $line, $spotter, $main::mycall);
+ if (@spot) {
+ # send orf to the users
+ DXProt::send_dx_spot($self, DXProt::pc11($spotter, $freq, $spotted, $line), @spot);
+ }
+}
+
+return (1, @out);