# Games::Checkers, Copyright (C) 1996-2012 Mikhael Goikhman, migo@cpan.org
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
use strict;
use warnings;
package Games::Checkers::Move;
use Games::Checkers::BoardConstants;
use Games::Checkers::LocationConversions;
sub new ($$$$) {
my $class = shift;
my ($is_beat, $src, $dsts) = @_;
die "Games::Checkers::Move constructor, third arg should be array"
unless ref($dsts) eq 'ARRAY';
die "No destinations in Move construction" unless $src == NL || @$dsts;
my $self = [ $is_beat, $src, [@$dsts] ];
bless $self, $class;
return $self;
}
use constant NoMove => Games::Checkers::Move->new(0, NL, []);
sub num_steps ($) {
my $self = shift;
return scalar @{$self->[2]};
}
sub is_beat ($) {
my $self = shift;
return $self->[0];
}
sub source ($) {
my $self = shift;
return $self->[1];
}
sub destin ($$) {
my $self = shift;
my $num = shift;
return $num < 0 || $num >= @{$self->[2]} ? NL : $self->[2]->[$num];
}
sub clone ($) {
my $self = shift;
return Games::Checkers::Move->new(@$self);
}
sub dump ($) {
my $self = shift;
my $delim = $self->is_beat ? ":" : "-";
my $str = location_to_str($self->source);
for (my $i = 0; $i < $self->num_steps; $i++) {
$str .= $delim . location_to_str($self->destin($i));
}
return $str;
}
1;