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package # hide from Pause
HTML::FormHandler::Params;
# ABSTRACT: params handling
use Moose;
use Carp;
has 'separator' => ( isa => 'Str', is => 'rw', default => '.' );
sub split_name {
my ( $self, $name, $sep ) = @_;
$sep ||= $self->separator;
$sep = "\Q$sep";
if ( $sep eq '[]' ) {
return grep { defined } (
$name =~ /
^ (\w+) # root param
| \[ (\w+) \] # nested
/gx
);
}
# These next two regexes are the escaping aware equivalent
# to the following:
# my ($first, @segments) = split(/\./, $name, -1);
# m// splits on unescaped '.' chars. Can't fail b/c \G on next
# non ./ * -> escaped anything -> non ./ *
$name =~ m/^ ( [^\\$sep]* (?: \\(?:.|$) [^\\$sep]* )* ) /gx;
my $first = $1;
$first =~ s/\\(.)/$1/g; # remove escaping
my (@segments) = $name =~
# . -> ( non ./ * -> escaped anything -> non ./ * )
m/\G (?:[$sep]) ( [^\\$sep]* (?: \\(?:.|$) [^\\$sep]* )* ) /gx;
# Escapes removed later, can be used to avoid using as array index
return ( $first, @segments );
}
sub expand_hash {
my ( $self, $flat, $sep ) = @_;
my $deep = {};
$sep ||= $self->separator;
for my $name ( keys %$flat ) {
my ( $first, @segments ) = $self->split_name( $name, $sep );
my $box_ref = \$deep->{$first};
for (@segments) {
if ( /^(0|[1-9]\d*)$/ ) {
$$box_ref = [] unless defined $$box_ref;
croak "HFH: param clash for $name=$_"
unless ref $$box_ref eq 'ARRAY';
$box_ref = \( $$box_ref->[$1] );
}
else {
s/\\(.)/$1/g if $sep; # remove escaping
$$box_ref = {} unless defined $$box_ref;
$$box_ref = { '' => $$box_ref } if ( !ref $$box_ref );
croak "HFH: param clash for $name=$_"
unless ref $$box_ref eq 'HASH';
$box_ref = \( $$box_ref->{$_} );
}
}
if ( defined $$box_ref ) {
croak "HFH: param clash for $name value $flat->{$name}"
if ref $$box_ref ne 'HASH';
$box_ref = \( $$box_ref->{''} );
}
$$box_ref = $flat->{$name};
}
return $deep;
}
sub collapse_hash {
my $self = shift;
my $deep = shift;
my $flat = {};
$self->_collapse_hash( $deep, $flat, () );
return $flat;
}
sub join_name {
my ( $self, @array ) = @_;
my $sep = substr( $self->separator, 0, 1 );
return join $sep, @array;
}
sub _collapse_hash {
my ( $self, $deep, $flat, @segments ) = @_;
if ( !ref $deep ) {
my $name = $self->join_name(@segments);
$flat->{$name} = $deep;
}
elsif ( ref $deep eq 'HASH' ) {
for ( keys %$deep ) {
# escape \ and separator chars (once only, at this level)
my $name = $_;
if ( defined( my $sep = $self->separator ) ) {
$sep = "\Q$sep";
$name =~ s/([\\$sep])/\\$1/g;
}
$self->_collapse_hash( $deep->{$_}, $flat, @segments, $name );
}
}
elsif ( ref $deep eq 'ARRAY' ) {
for ( 0 .. $#$deep ) {
$self->_collapse_hash( $deep->[$_], $flat, @segments, $_ )
if defined $deep->[$_];
}
}
else {
croak "Unknown reference type for ", $self->join_name(@segments), ":", ref $deep;
}
}
__PACKAGE__->meta->make_immutable;
use namespace::autoclean;
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
HTML::FormHandler::Params - params handling
=head1 VERSION
version 0.40057
=head1 AUTHOR
FormHandler Contributors - see HTML::FormHandler
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by Gerda Shank.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
