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package Catmandu::Store::Hash::Bag;
use Catmandu::Sane;
our $VERSION = '1.2024';
use Moo;
use Catmandu::Hits;
use Clone qw(clone);
use namespace::clean;
with 'Catmandu::Bag';
with 'Catmandu::Droppable';
has _hash =>
(is => 'rw', lazy => 1, init_arg => undef, builder => '_build_hash');
has _head => (is => 'rw', init_arg => undef, clearer => '_clear_head');
has _tail => (is => 'rw', init_arg => undef, clearer => '_clear_tail');
sub _build_hash {
my $self = $_[0];
$self->store->_hashes->{$self->name} ||= {};
}
sub generator {
my $self = $_[0];
sub {
state $node = $self->_head;
state $data;
$node || return;
$data = $node->[1];
$node = $node->[2];
$data;
};
}
sub get {
my ($self, $id) = @_;
my $node = $self->_hash->{$id} || return;
clone($node->[1]);
}
sub add {
my ($self, $data) = @_;
my $id = $data->{$self->id_key};
my $node = $self->_hash->{$id};
if ($node) {
$node->[1] = clone($data);
}
elsif (my $tail = $self->_tail) {
$tail->[2] = $node = [$tail, clone($data), undef];
$self->_hash->{$id} = $node;
$self->_tail($node);
}
else {
$node = [undef, clone($data), undef];
$self->_hash->{$id} = $node;
$self->_head($node);
$self->_tail($node);
}
$data;
}
sub delete {
my ($self, $id) = @_;
my $node = $self->_hash->{$id} || return;
if ($node->[0]) {
$node->[0][2] = $node->[2];
}
else {
$self->_head($node->[2]);
}
if ($node->[2]) {
$node->[2][0] = $node->[0];
}
else {
$self->_tail($node->[0]);
}
delete $self->_hash->{$id};
}
sub delete_all {
my $self = $_[0];
$self->_clear_head;
$self->_clear_tail;
$self->_hash($self->store->_hashes->{$self->name} = {});
}
sub drop {
$_[0]->delete_all;
}
1;
__END__
=pod
=head1 NAME
Catmandu::Store::Hash::Bag - Bag implementation for the Hash store
=cut
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