# Copyright (c) 2010 bivio Software Inc.  All Rights Reserved.
#
# Visit http://www.bivio.biz for more info.
# 
# This library is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of the
# License, or (at your option) any later version.
# 
# This library 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
# Lesser General Public License for more details.
# 
# You should have received a copy of the GNU Lesser General Public
# License along with this library;  If not, you may get a copy from:
# http://www.opensource.org/licenses/lgpl-license.html
# 
# $Id: ContextWritebackForm.pm,v 2.1 2010/10/15 20:53:00 moeller Exp $
package Bivio::Biz::Model::ContextWritebackForm;
use strict;
use Bivio::Base 'Biz.FormModel';

our($VERSION) = sprintf('%d.%02d', q$Revision: 2.1 $ =~ /\d+/g);
				       
sub TARGET_FIELD {
    return 'target_field';
}

sub execute_cancel {
    my($self) = @_;
    return $self->internal_redirect_next;
}

sub execute_empty {
    my($self) = @_;
    return 'no_context_task'
        unless _validate_context($self);
    return;
}

sub execute_ok {
    my($self) = @_;
    $self->internal_stay_on_page;
    return;
}

sub internal_initialize {
    my($self) = @_;
    return $self->merge_initialize_info($self->SUPER::internal_initialize, {
        version => 1,
        require_context => 1,
    });
}

sub get_target_value {
    my($self) = @_;
    return ($self->unsafe_get_context_field(_target_field($self)))[0];
}

sub set_target_and_redirect {
    my($self, $value) = @_;
    return 'no_context_task'
        unless _validate_context($self);
    $self->put_context_fields(_target_field($self) => $value);
    return $self->internal_redirect_next;
}

sub target_config {
    my($proto) = @_;
    return {
        name => $proto->TARGET_FIELD,
        type => 'Name',
        constraint => 'NONE',
    };
}

sub _target_field {
    my($self) = @_;
    return ($self->unsafe_get_context_field($self->TARGET_FIELD))[0];
}

sub _validate_context {
    my($self) = @_;
    return 1 unless $self->req(qw(task require_context));
    return 1 if $self->unsafe_get_context
        && $self->unsafe_get_context->get('form_model')
        && _target_field($self);
    b_warn('context form w/invalid context');
    return 0;
}

1;