1 files changed, 166 insertions, 0 deletions
diff --git a/lib/Reaction/UI/ViewPort/Field.pm b/lib/Reaction/UI/ViewPort/Field.pm
new file mode 100644
index 0000000..41a7c42
--- /dev/null
+++ b/lib/Reaction/UI/ViewPort/Field.pm
@@ -0,0 +1,166 @@
+package Reaction::UI::ViewPort::Field;
+
+use Reaction::Class;
+
+class Field is 'Reaction::UI::ViewPort', which {
+
+  has name => (
+    isa => 'Str', is => 'rw', required => 1
+  );
+
+  has action => (
+    isa => 'Reaction::InterfaceModel::Action',
+    is => 'ro', required => 0, predicate => 'has_action',
+  );
+
+  has attribute => (
+    isa => 'Reaction::Meta::InterfaceModel::Action::ParameterAttribute',
+    is => 'ro', predicate => 'has_attribute',
+  );
+
+  has value => (
+    is => 'rw', lazy_build => 1, trigger_adopt('value'),
+    clearer => 'clear_value',
+  );
+
+  has needs_sync => (
+    isa => 'Int', is => 'rw', default => 0
+  );
+
+  has label => (isa => 'Str', is => 'rw', lazy_build => 1);
+
+  has message => (
+    isa => 'Str', is => 'rw', required => 1, default => sub { '' }
+  );
+
+  implements BUILD => as {
+    my ($self) = @_;
+    if (!$self->has_attribute != !$self->has_action) {
+      confess "Should have both action and attribute or neither";
+    }
+  };
+
+  implements build_label => as {
+    my ($self) = @_;
+    return join(' ', map { ucfirst } split('_', $self->name));
+  };
+
+  implements build_value => as {
+    my ($self) = @_;
+    if ($self->has_attribute) {
+      my $reader = $self->attribute->get_read_method;
+      my $predicate = $self->attribute->predicate;
+      if (!$predicate || $self->action->$predicate) {
+        return $self->action->$reader;
+      }
+    }
+    return '';
+  };
+
+  implements adopt_value => as {
+    my ($self) = @_;
+    $self->needs_sync(1) if $self->has_attribute;
+  };
+
+  implements sync_to_action => as {
+    my ($self) = @_;
+    return unless $self->needs_sync && $self->has_attribute && $self->has_value;
+    my $attr = $self->attribute;
+    if (my $tc = $attr->type_constraint) {
+      my $value = $self->value;
+      if ($tc->has_coercion) {
+        $value = $tc->coercion->coerce($value);
+      }
+      my $error = $tc->validate($self->value);
+      if (defined $error) {
+        $self->message($error);
+        return;
+      }
+    }
+    my $writer = $attr->get_write_method;
+    confess "No writer for attribute" unless defined($writer);
+    $self->action->$writer($self->value);
+    $self->needs_sync(0);
+  };
+
+  implements sync_from_action => as {
+    my ($self) = @_;
+    return unless !$self->needs_sync && $self->has_attribute;
+    $self->message($self->action->error_for($self->attribute)||'');
+  };
+
+  override accept_events => sub { ('value', super()) };
+
+};
+
+1;
+
+=head1 NAME
+
+Reaction::UI::ViewPort::Field
+
+=head1 DESCRIPTION
+
+This viewport is the base class for all field types.
+
+=head1 ATTRIBUTES
+
+=head2 name
+
+=head2 action
+
+L<Reaction::InterfaceModel::Action>
+
+=head2 attribute
+
+L<Reaction::Meta::InterfaceModel::Action::ParameterAttribute>
+
+=head2 value
+
+=head2 needs_sync
+
+=head2 label
+
+User friendly label, by default is based on the name.
+
+=head2 message
+
+Optional string relating to the field.
+
+=head1 SEE ALSO
+
+=head2 L<Reaction::UI::ViewPort>
+
+=head2 L<Reaction::UI::ViewPort::DisplayField>
+
+=head2 L<Reaction::UI::ViewPort::Field::Boolean>
+
+=head2 L<Reaction::UI::ViewPort::Field::ChooseMany>
+
+=head2 L<Reaction::UI::ViewPort::Field::ChooseOne>
+
+=head2 L<Reaction::UI::ViewPort::Field::DateTime>
+
+=head2 L<Reaction::UI::ViewPort::Field::File>
+
+=head2 L<Reaction::UI::ViewPort::Field::HiddenArray>
+
+=head2 L<Reaction::UI::ViewPort::Field::Number>
+
+=head2 L<Reaction::UI::ViewPort::Field::Password>
+
+=head2 L<Reaction::UI::ViewPort::Field::String>
+
+=head2 L<Reaction::UI::ViewPort::Field::Text>
+
+=head2 L<Reaction::UI::ViewPort::Field::TimeRange>
+
+=head1 AUTHORS
+
+See L<Reaction::Class> for authors.
+
+=head1 LICENSE
+
+See L<Reaction::Class> for the license.
+
+=cut