1 files changed, 138 insertions, 0 deletions
diff --git a/lib/Reaction/UI/ViewPort/Field/ChooseOne.pm b/lib/Reaction/UI/ViewPort/Field/ChooseOne.pm
new file mode 100644
index 0000000..ea0db1d
--- /dev/null
+++ b/lib/Reaction/UI/ViewPort/Field/ChooseOne.pm
@@ -0,0 +1,138 @@
+package Reaction::UI::ViewPort::Field::ChooseOne;
+
+use Reaction::Class;
+use URI;
+use Scalar::Util 'blessed';
+
+class ChooseOne is 'Reaction::UI::ViewPort::Field', which {
+
+  has '+layout' => (default => 'select');
+  
+  has valid_value_names => (isa => 'ArrayRef', is => 'ro', lazy_build => 1);
+  
+  has valid_values => (isa => 'ArrayRef', is => 'ro', lazy_build => 1);
+  
+  has name_to_value_map => (isa => 'HashRef', is => 'ro', lazy_build => 1);
+  
+  has value_to_name_map => (isa => 'HashRef', is => 'ro', lazy_build => 1);
+  
+  has value_map_method => (
+    isa => 'Str', is => 'ro', required => 1, default => sub { 'display_name' },
+  );
+  
+  around value => sub {
+    my $orig = shift;
+    my $self = shift;
+    if (@_) {
+      my $value = shift;
+      if (defined $value) {
+        if (!ref $value) {
+          $value = $self->str_to_ident($value);
+        }
+        my $checked = $self->attribute->check_valid_value($self->action, $value);
+        confess "${value} is not a valid value" unless defined($checked);
+        $value = $checked;
+      }
+      $orig->($self, $value);
+    } else {
+      $orig->($self);
+    }
+  };
+  
+  implements build_valid_values => as {
+    my $self = shift;
+    return [ $self->attribute->all_valid_values($self->action) ];
+  };
+  
+  implements build_valid_value_names => as {
+    my $self = shift;
+    my $all = $self->valid_values;
+    my $meth = $self->value_map_method;
+    my @names = map { $_->$meth } @$all;
+    return [ sort @names ];
+  };
+  
+  implements build_name_to_value_map => as {
+    my $self = shift;
+    my $all = $self->valid_values;
+    my $meth = $self->value_map_method;
+    my %map;
+    $map{$_->$meth} = $self->obj_to_str($_) for @$all;
+    return \%map;
+  };
+  
+  implements build_value_to_name_map => as {
+    my $self = shift;
+    my $all = $self->valid_values;
+    my $meth = $self->value_map_method;
+    my %map;
+    $map{$self->obj_to_str($_)} = $_->$meth for @$all;
+    return \%map;
+  };
+  
+  implements is_current_value => as {
+    my ($self, $check_value) = @_;
+    my $our_value = $self->value;
+    return unless ref($our_value);
+    $check_value = $self->obj_to_str($check_value) if ref($check_value);
+    return $self->obj_to_str($our_value) eq $check_value;
+  };
+
+  implements str_to_ident => as {
+    my ($self, $str) = @_;
+    my $u = URI->new('','http');
+    $u->query($str);
+    return { $u->query_form };
+  };
+
+  implements obj_to_str => as {
+    my ($self, $obj) = @_;
+    return $obj unless ref($obj);
+    confess "${obj} not an object" unless blessed($obj);
+    my $ident = $obj->ident_condition;
+    my $u = URI->new('', 'http');
+    $u->query_form(%$ident);
+    return $u->query;
+  };
+
+};
+
+1;
+
+=head1 NAME
+
+Reaction::UI::ViewPort::Field::ChooseOne
+
+=head1 DESCRIPTION
+
+=head1 METHODS
+
+=head2 is_current_value
+
+=head2 value
+
+=head2 valid_values
+
+=head2 valid_value_names
+
+=head2 value_to_name_map
+
+=head2 name_to_value_map
+
+=head2 str_to_ident
+
+=head2 obj_to_str
+
+=head1 SEE ALSO
+
+=head2 L<Reaction::UI::ViewPort::Field>
+
+=head1 AUTHORS
+
+See L<Reaction::Class> for authors.
+
+=head1 LICENSE
+
+See L<Reaction::Class> for the license.
+
+=cut