sub sort_items {
    my $items = shift;

    my @items_sorted = sort {
       ( $a->{'id'} || 9999999999999 ) <=> ( $b->{'id'} || 9999999999999 )
        ||
        ( psql_date_to_DateTime( $a->{'dateend'} ) <=> psql_date_to_DateTime( $b->{'dateend'} ) )

    } @$items;

    \@items_sorted;
}


# later ...

sub foo {
   my $items = shift;  # array ref
   $items = sort_items( $items );
}