package LATMOS::Accounts::Bases;

use 5.010000;
use strict;
use warnings;
use LATMOS::Accounts::Bases::Objects;

our $VERSION = (q$Rev$ =~ /^Rev: (\d+) /)[0];

=head1 NAME

LATMOS::Accounts::Bases - Base class for account data bases

=head1 SYNOPSIS

  use LATMOS::Accounts::Bases;
  my $base = LATMOS::Accounts::Bases->new('type', %options);
  ...

=head1 DESCRIPTION

This module provide basic functions for various account base

=head1 FUNTIONS

=cut

=head2 new($type, %options)

Return, if success, a new data base account object, $type is
account base type, %options to setup the base.

=cut

sub new {
    my ($class, $type, %options) = @_;

    my $pclass = ucfirst(lc($type));
    eval "require LATMOS::Accounts::Bases::$pclass;";
    if ($@) { return } # error message ?
    return "LATMOS::Accounts::Bases::$pclass"->new(%options);
}

=head2 get_object($type, $id)

Return an object of $type (typically user or group) having identifier
$id.

=cut

sub get_object {
    my ($self, $otype, $id) = @_;

    return LATMOS::Accounts::Bases::Objects->new($self, $otype, $id);
}

=head2 load

Make account base loading data into memory if need.
Should always be called, if database fetch data on the fly
(SQL, LDAP), the function just return True.

=cut

sub load { 1 }

=head2 is_transactionnal

Return True is the database support commit and rollback

=cut

sub is_transactionnal {
    my ($self) = @_;
    return($self->can('_rollback') && $self->can('_commit'));
}

=head2 commit

Save change into the database if change are not done immediately.
This should always be called as you don't know when change are applied.

Return always true if database does not support any transaction.

The driver should provides a _commit functions to save data.

=cut

sub commit {
    my ($self) = @_;
    return $self->can('_commit') ? $self->_commit : 1;
}

=head2 rollback

If database support transaction, rollback changes. Return false
if database does not support.

If supported, driver should provides a _rollback functions

=cut

sub rollback {
    my ($self) = @_;
    return $self->can('_rollback') ? $self->_commit : 0;
}

1;

__END__

=head1 SEE ALSO

=head1 AUTHOR

Thauvin Olivier, E<lt>olivier.thauvin.ipsl.fr.thauvin@latmos.ipsl.fr<gt>

=head1 COPYRIGHT AND LICENSE

Copyright (C) 2009 by Thauvin Olivier

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.10.0 or,
at your option, any later version of Perl 5 you may have available.

=cut