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package Perl::ToPerl6::ProfilePrototype;
use 5.006001;
use strict;
use warnings;
use English qw(-no_match_vars);
use Perl::ToPerl6::Config qw{};
use Perl::ToPerl6::Transformer qw{};
use Perl::ToPerl6::Utils qw{ :characters };
use overload ( q{""} => 'to_string' );
#-----------------------------------------------------------------------------
sub new {
    my ($class, %args) = @_;
    my $self = bless {}, $class;
    my $transformers = $args{-transformers} || [];
    $self->{_transformers} = [ sort _by_type @{ $transformers } ];
    my $comment_out_parameters = $args{'-comment-out-parameters'};
    if (not defined $comment_out_parameters) {
        $comment_out_parameters = 1;
    }
    $self->{_comment_out_parameters} = $comment_out_parameters;
    my $configuration = $args{'-config'};
    if (not $configuration) {
        $configuration = Perl::ToPerl6::Config->new(-profile => $EMPTY);
    }
    $self->{_configuration} = $configuration;
    return $self;
}
#-----------------------------------------------------------------------------
sub _get_transformers {
    my ($self) = @_;
    return $self->{_transformers};
}
sub _comment_out_parameters {
    my ($self) = @_;
    return $self->{_comment_out_parameters};
}
sub _configuration {
    my ($self) = @_;
    return $self->{_configuration};
}
#-----------------------------------------------------------------------------
sub _line_prefix {
    my ($self) = @_;
    return $self->_comment_out_parameters() ? q{# } : $EMPTY;
}
#-----------------------------------------------------------------------------
sub to_string {
    my ($self) = @_;
    my $prefix = $self->_line_prefix();
    my $configuration = $self->_configuration();
    my $prototype = "# Globals\n";
    $prototype .= $prefix;
    $prototype .= q{necessity = };
    $prototype .= $configuration->necessity();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{detail = };
    $prototype .= $configuration->detail();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{force = };
    $prototype .= $configuration->force();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{in-place = };
    $prototype .= $configuration->in_place();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{only = };
    $prototype .= $configuration->only();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{profile-strictness = };
    $prototype .= $configuration->profile_strictness();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{color = };
    $prototype .= $configuration->color();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{pager = };
    $prototype .= $configuration->pager();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{top = };
    $prototype .= $configuration->top();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{verbose = };
    $prototype .= $configuration->verbose();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{include = };
    $prototype .= join $SPACE, $configuration->include();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{exclude = };
    $prototype .= join $SPACE, $configuration->exclude();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{single-transformer = };
    $prototype .= join $SPACE, $configuration->single_transformer();
    $prototype .= "\n";
    $prototype .= $prefix;
    $prototype .= q{theme = };
    $prototype .= $configuration->theme()->rule();
    $prototype .= "\n";
    foreach my $item (qw<
        color-necessity-highest
        color-necessity-high
        color-necessity-medium
        color-necessity-low
        color-necessity-lowest
        >) {
        ( my $accessor = $item ) =~ s/ - /_/gmsx;
        $prototype .= $prefix;
        $prototype .= "$item = ";
        $prototype .= $configuration->$accessor;
        $prototype .= "\n";
    }
    $prototype .= $prefix;
    $prototype .= q{program-extensions = };
    $prototype .= join $SPACE, $configuration->program_extensions();
    Perl::ToPerl6::Transformer::set_format( $self->_proto_format() );
    my $transformer_prototypes = join qq{\n}, map { "$_" } @{ $self->_get_transformers() };
    $transformer_prototypes =~ s/\s+ \z//xms; # Trim trailing whitespace
    return $prototype . "\n\n" . $transformer_prototypes . "\n";
}
#-----------------------------------------------------------------------------
# About "%{\\n%\\x7b# \\x7df\n${prefix}%n = %D\\n}O" below:
#
# The %0 format for a transformer specifies how to format parameters.
# For a parameter %f specifies the full description.
#
# The problem is that both of these need to take options, but String::Format
# doesn't allow nesting of {}.  So, to get the option to the %f, the braces
# are hex encoded.  I.e., assuming that comment_out_parameters is in effect,
# the parameter sees:
#
#    \n%{# }f\n# %n = %D\n
sub _proto_format {
    my ($self) = @_;
    my $prefix = $self->_line_prefix();
    return <<"END_OF_FORMAT";
# %a
[%p]
${prefix}set_themes                         = %t
${prefix}add_themes                         =
${prefix}necessity                           = %s
%{\\n%\\x7b# \\x7df\\n${prefix}%n = %D\\n}O%{${prefix}Cannot programmatically discover what parameters this transformer takes.\\n}U
END_OF_FORMAT
}
#-----------------------------------------------------------------------------
sub _by_type { return ref $a cmp ref $b }
1;
__END__
HideShow 73 lines of Pod
=pod
=head1 NAME
Perl::ToPerl6::ProfilePrototype - Generate an initial Perl::ToPerl6 profile.
=head1 DESCRIPTION
This is a helper class that generates a prototype of a
L<Perl::ToPerl6|Perl::ToPerl6> profile (e.g. a F<.perlmogrifyrc> file.
There are no user-serviceable parts here.
=head1 INTERFACE SUPPORT
This is considered to be a non-public class.  Its interface is subject
to change without notice.
=head1 CONSTRUCTOR
=over
=item C<< new( -transformers => \@TRANSFORMER_OBJECTS ) >>
Returns a reference to a new C<Perl::ToPerl6::ProfilePrototype> object.
=back
=head1 METHODS
=over
=item to_string()
Returns a string representation of this C<ProfilePrototype>.  See
L<"OVERLOADS"> for more information.
=back
=head1 OVERLOADS
When a
L<Perl::ToPerl6::ProfilePrototype|Perl::ToPerl6::ProfilePrototype> is
evaluated in string context, it produces a multi-line summary of the
transformer name, default themes, and default necessity for each
L<Perl::ToPerl6::Transformer|Perl::ToPerl6::Transformer> object that was given to
the constructor of this C<ProfilePrototype>.  If the Transformer supports
an additional parameters, they will also be listed (but
commented-out).  The format is suitable for use as a F<.perlmogrifyrc>
file.
=head1 AUTHOR
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>
=head1 COPYRIGHT
Copyright (c) 2005-2011 Imaginative Software Systems.  All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.  The full text of this license
can be found in the LICENSE file included with this module.
=cut
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