package Catmandu::Store::File::Memory::Index;
our $VERSION = '1.0605';
use Catmandu::Sane;
use Moo;
use Carp;
use namespace::clean;
use Data::Dumper;
with 'Catmandu::Bag';
with 'Catmandu::FileBag::Index';
with 'Catmandu::Droppable';
sub generator {
my ($self) = @_;
my $name = $self->name;
my $containers = $self->store->_files->{$name} // {};
return sub {
state $list = [keys %$containers];
my $key = pop @$list;
return undef unless $key;
+{_id => $key};
};
}
sub exists {
my ($self, $id) = @_;
croak "Need an id" unless defined $id;
my $name = $self->name;
my $containers = $self->store->_files->{$name} // {};
return exists $containers->{$id};
}
sub add {
my ($self, $data) = @_;
croak "Need an id" unless defined $data && exists $data->{_id};
my $id = $data->{_id};
if (exists $data->{_stream}) {
croak "Can't add a file to the index";
}
my $name = $self->name;
$self->store->_files->{$name}->{$id} = +{_id => $id,};
return $self->get($id);
}
sub get {
my ($self, $id) = @_;
croak "Need an $id" unless defined $id;
my $name = $self->name;
my $containers = $self->store->_files->{$name} // {};
return $containers->{$id};
}
sub delete {
my ($self, $id) = @_;
croak "Need an $id" unless defined $id;
my $name = $self->name;
my $containers = $self->store->_files->{$name} // {};
delete $containers->{$id};
1;
}
sub delete_all {
my ($self) = @_;
$self->each(
sub {
my $id = shift->{_id};
$self->delete($id);
}
);
1;
}
sub drop {
$_[0]->delete_all;
}
1;
__END__
=pod
=head1 NAME
Catmandu::Store::File::Memory::Index - Index of all "Folders" in a Catmandu::Store::File::Memory
=head1 SYNOPSIS
use Catmandu;
my $store = Catmandu->store('File::Memory');
my $index = $store->index;
# List all containers
$index->each(sub {
my $container = shift;
print "%s\n" , $container->{_id};
});
# Add a new folder
$index->add({_id => '1234'});
# Delete a folder
$index->delete(1234);
# Get a folder
my $folder = $index->get(1234);
# Get the files in an folder
my $files = $index->files(1234);
$files->each(sub {
my $file = shift;
my $name = $file->_id;
my $size = $file->size;
my $content_type = $file->content_type;
my $created = $file->created;
my $modified = $file->modified;
$file->stream(IO::File->new(">/tmp/$name"), file);
});
# Add a file
$files->upload(IO::File->new("<data.dat"),"data.dat");
# Retrieve a file
my $file = $files->get("data.dat");
# Stream a file to an IO::Handle
$files->stream(IO::File->new(">data.dat"),$file);
# Delete a file
$files->delete("data.dat");
# Delete a folders
$index->delete("1234");
=head1 DESCRIPTION
A L<Catmandu::Store::File::Memory::Index> contains all "folders" available in a
L<Catmandu::Store::File::Memory> FileStore. All methods of L<Catmandu::Bag>,
L<Catmandu::FileBag::Index> and L<Catmandu::Droppable> are
implemented.
Every L<Catmandu::Bag> is also an L<Catmandu::Iterable>.
=head1 FOLDERS
All files in a L<Catmandu::Store::File::Memory> are organized in "folders". To add
a "folder" a new record needs to be added to the L<Catmandu::Store::File::Memory::Index> :
$index->add({_id => '1234'});
The C<_id> field is the only metadata available in Memory stores. To add more
metadata fields to a Memory store a L<Catmandu::Plugin::SideCar> is required.
=head1 FILES
Files can be accessed via the "folder" identifier:
my $files = $index->files('1234');
Use the C<upload> method to add new files to a "folder". Use the C<download> method
to retrieve files from a "folder".
$files->upload(IO::File->new("</tmp/data.txt"),'data.txt');
my $file = $files->get('data.txt');
$files->download(IO::File->new(">/tmp/data.txt"),$file);
=head1 INHERITED METHODS
This Catmandu::Bag implements:
=over 3
=item L<Catmandu::Bag>
=item L<Catmandu::FileBag::Index>
=item L<Catmandu::Droppable>
=back
=cut