# Module of TWiki Enterprise Collaboration Platform, http://TWiki.org/
#
# Copyright (C) 2005-2018 Peter Thoeny, peter[at]thoeny.org
# and TWiki Contributors. All Rights Reserved. TWiki Contributors
# are listed in the AUTHORS file in the root of this distribution.
# NOTE: Please extend that file, not this notice.
#
# Additional copyrights apply to some or all of the code in this
# file as follows:
#
# 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. For
# more details read LICENSE in the root of this distribution.
#
# 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.
#
# As per the GPL, removal of this notice is prohibited.
#
# Author: Crawford Currie http://c-dot.co.uk

=pod

---+ package TWiki::If::Node

Node class for the result of an If statement parse

=cut

package TWiki::If::Node;
use base 'TWiki::Query::Node';

use strict;

require TWiki::Infix::Node;

sub newLeaf {
    my( $class, $val, $type ) = @_;
    if( $type == $TWiki::Infix::Node::NAME && $val =~ /^(\{\w+\})+$/) {
        eval '$val = $TWiki::cfg'.$val;
        return $class->SUPER::newLeaf($val, $TWiki::Infix::Node::STRING);
    } else {
        return $class->SUPER::newLeaf($val, $type);
    }
}

# Used wherever a plain string is expected, this method suppresses automatic
# lookup of names in meta-data
sub _evaluate {
    my $this = shift;
    my $result;

    if (!ref( $this->{op})) {
        return $this->{params}[0];
    } else {
        return $this->evaluate(@_);
    }
}

1;