+ return $params->{data};
+}
+
+sub create_unique_sesion_value {
+ my ($self, $value, %params) = @_;
+
+ $self->{SESSION} ||= { };
+
+ my @now = gettimeofday();
+ my $key = "$$-" . ($now[0] * 1000000 + $now[1]) . "-";
+ $self->{unique_counter} ||= 0;
+
+ $self->{unique_counter}++ while exists $self->{SESSION}->{$key . $self->{unique_counter}};
+ $self->{unique_counter}++;
+
+ $value = { expiration => $params{expiration} ? ($now[0] + $params{expiration}) * 1000000 + $now[1] : undef,
+ no_auto => !$params{auto_restore},
+ data => $value,
+ };
+
+ $self->{SESSION}->{$key . $self->{unique_counter}} = YAML::Dump($value);
+
+ return $key . $self->{unique_counter};
+}
+
+sub save_form_in_session {
+ my ($self, %params) = @_;
+
+ my $form = delete($params{form}) || $::form;
+ my $non_scalars = delete $params{non_scalars};
+ my $data = {};
+
+ my %skip_keys = map { ( $_ => 1 ) } (qw(login password stylesheet version titlebar), @{ $params{skip_keys} || [] });
+
+ foreach my $key (grep { !$skip_keys{$_} } keys %{ $form }) {
+ $data->{$key} = $form->{$key} if !ref($form->{$key}) || $non_scalars;
+ }
+
+ return $self->create_unique_sesion_value($data, %params);
+}
+
+sub restore_form_from_session {
+ my ($self, $key, %params) = @_;
+
+ my $data = $self->get_session_value($key);
+ return $self unless $data;
+
+ my $form = delete($params{form}) || $::form;
+ my $clobber = exists $params{clobber} ? $params{clobber} : 1;
+
+ map { $form->{$_} = $data->{$_} if $clobber || !exists $form->{$_} } keys %{ $data };
+
+ return $self;
+}
+
+sub expire_session_keys {
+ my ($self) = @_;
+
+ $self->{SESSION} ||= { };
+
+ my @now = gettimeofday();
+ my $now = $now[0] * 1000000 + $now[1];
+
+ $self->delete_session_value(map { $_->[0] }
+ grep { $_->[1]->{expiration} && ($now > $_->[1]->{expiration}) }
+ map { [ $_, $self->_load_value($self->{SESSION}->{$_}) ] }
+ keys %{ $self->{SESSION} });
+
+ return $self;
+}
+
+sub _has_expiration {
+ my ($value) = @_;
+ return (ref $value eq 'HASH') && exists($value->{expiration}) && $value->{data};