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package Catmandu::Fix::Bind::each;
our $VERSION = '1.2024';
use strict;
use warnings;
use Catmandu::Sane;
use Moo;
use Catmandu::Util;
use Catmandu::Fix::Has;
use Carp;
with 'Catmandu::Fix::Bind', 'Catmandu::Fix::Bind::Group';
has path => (fix_opt => 1);
has var => (fix_opt => 1);
has _root_ => (is => 'rw');
sub unit {
my ($self, $data) = @_;
$self->_root_($data);
if ($self->path && $self->path ne '.') {
return Catmandu::Util::data_at($self->path, $data);
}
else {
return $data;
}
}
sub bind {
my ($self, $data, $code) = @_;
if (!Catmandu::Util::is_hash_ref($data)) {
$code->($data);
}
else {
my @keys = sort keys %{$data};
for my $key (@keys) {
my $value = $data->{$key};
my $scope;
if ($self->var) {
$scope = $self->_root_;
$scope->{$self->var} = {'key' => $key, 'value' => $value};
}
else {
$scope = $data;
$scope->{'key'} = $key;
$scope->{'value'} = $value;
}
$code->($scope);
if ($self->var) {
# Key and values can be updated
if (my $mkey = $scope->{$self->var}->{key}) {
$data->{$mkey} = $scope->{$self->var}->{value};
if ($mkey ne $key) {
delete $data->{$key};
}
}
delete $scope->{$self->var};
}
else {
if (my $mkey = $scope->{key}) {
$data->{$mkey} = $scope->{value};
if ($mkey ne $key) {
delete $data->{$key};
}
}
delete $scope->{'key'};
delete $scope->{'value'};
}
}
}
return $data;
}
1;
__END__
=pod
=head1 NAME
Catmandu::Fix::Bind::each - a binder that executes fixes for every (key, value) pair in a hash
=head1 SYNOPSIS
# Create a hash:
# demo:
# nl: 'Tuin der lusten'
# en: 'The Garden of Earthly Delights'
# Create a list of all the titles, without the language tags.
do each(path: demo, var: t)
copy_field(t.value, titles.$append)
end
# This will result in:
# demo:
# nl: 'Tuin der lusten'
# en: 'The Garden of Earthly Delights'
# titles:
# - 'Tuin der lusten'
# - 'The Garden of Earthly Delights'
# Upcase every key in the root hash
# foo: bar
# test: 1234
do each(path:., var: t)
upcase(t.key)
end
# This will result in
# FOO: bar
# TEST: 1234
=head1 DESCRIPTION
The each binder will iterate over a hash and return a (key, value)
pair (see the Perl L<each|http://perldoc.perl.org/functions/each.html> function
for the inspiration for this bind) and execute all fixes for each pair.
The bind always returns a C<var.key> and C<var.value> pair which can be used
in the fixes.
=head1 CONFIGURATION
=head2 path
The path to a hash in the data.
=head2 var
The temporary field that will be created in the root of the record
containing a C<key> and C<value> field containing the I<key> and
I<value> of the iterated data.
=head1 AUTHOR
Pieter De Praetere, C<< pieter.de.praetere at helptux.be >>
=head1 SEE ALSO
L<Catmandu::Fix::Bind::list>
L<Catmandu::Fix::Bind>
=cut
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