1 files changed, 118 insertions, 0 deletions
diff --git a/lib/GridFiller/Chooser/Smarter.pm b/lib/GridFiller/Chooser/Smarter.pm
new file mode 100644
index 0000000..814e930
--- /dev/null
+++ b/lib/GridFiller/Chooser/Smarter.pm
@@ -0,0 +1,118 @@
+package GridFiller::Chooser::Smarter;
+use Moose;
+use namespace::autoclean -also => [qw(maxfirst)];
+use GridFiller::Constants ':all';
+use List::Util 'reduce';
+use Carp;
+
+extends 'GridFiller::Chooser';
+
+sub maxfirst {
+    return reduce { $a->[0] > $b->[0] ? $a : $b } @_;
+}
+
+sub find_place_for {
+    my ($self,$word) = @_;
+
+    my $length = length $word;
+
+    my @candidates;
+
+    push @candidates, $self->_find_places_horiz($length);
+    push @candidates, $self->_find_places_vert($length);
+
+    return unless @candidates;
+
+    my $ret = maxfirst @candidates;
+
+    shift @$ret;
+
+    return @$ret;
+}
+
+sub _find_places_horiz {
+    my ($self,$length) = @_;
+
+    my $rows = scalar @{$self->grid};
+    my ($col,$space);
+
+    my @ret;
+
+    for my $row (0..$rows-1) {
+        ($space,$col) = $self->_find_in_row($row,$length);
+        push @ret, [$space,$col,$row,$HORIZONTAL] if defined $space;
+    }
+    return @ret;
+}
+
+sub _find_places_vert {
+    my ($self,$length) = @_;
+
+    my $cols = scalar @{$self->grid->[0]};
+    my ($row,$space);
+
+    my @ret;
+
+    for my $col (0..$cols-1) {
+        ($space,$row) = $self->_find_in_col($col,$length);
+        push @ret,[$space,$col,$row,$VERTICAL] if defined $space;
+    }
+    return @ret;
+}
+
+{
+my %symbols=(
+    $NOTHING => ' ',
+    $BLACK => 'X',
+    $WHITE => 'O',
+);
+
+sub _do_find {
+    my ($self,$str,$length) = @_;
+
+    my $rx = qr{\G .*?
+                (?:
+                    X{$length} (?<tail>X*)
+                |
+                    O{$length} (?<tail>O*)
+                ) }x;
+
+    pos($str)=undef;
+
+    my @ret;
+
+    while ($str =~ m{$rx}gc) {
+        my $tail=length $+{tail};
+        my $skip=pos($str)-$length-$tail;
+
+        push @ret,[$tail,$skip];
+        $self->log->debug(" skip $skip tail $tail")
+    }
+
+    return unless @ret;
+
+    return @{maxfirst(@ret)};
+}
+
+sub _find_in_row {
+    my ($self,$row,$length) = @_;
+
+    my $str = join '',map { $symbols{$_} } @{$self->grid->[$row]};
+
+    $self->log->debug("row $row = $str");
+
+    return $self->_do_find($str,$length);
+}
+
+sub _find_in_col {
+    my ($self,$col,$length) = @_;
+
+    my $str = join '',map { $symbols{$_->[$col]} } @{$self->grid};
+
+    $self->log->debug("col $col = $str");
+
+    return $self->_do_find($str,$length);
+}
+}
+
+1;