+ my $ratio = $supp_pkg_freq / $main_pkg_freq;
+ if ( $ratio == int($ratio) ) {
+ # simple case: main package is X months, supp package is X*A months,
+ # advance supp package to where the main package will be in A cycles.
+ $next_bill = $sdate;
+ for (1..$ratio) {
+ $next_bill = $part_pkg->add_freq( $next_bill, $main_pkg_freq );
+ }
+ } else {
+ # harder case: main package is X months, supp package is Y months.
+ # advance supp package by Y months. then if they're within half a
+ # month of each other, resync them. this may result in the period
+ # not being exactly Y months.
+ $next_bill = $part_pkg->add_freq( $sdate, $supp_pkg_freq );
+ my $main_next_bill = $main_pkg->bill;
+ if ( $main_pkg->bill <= $time ) {
+ # then the main package has not yet been billed on this cycle;
+ # predict what its bill date will be.
+ $main_next_bill =
+ $part_pkg->add_freq( $main_next_bill, $main_pkg_freq );
+ }
+ if ( abs($main_next_bill - $next_bill) < 86400*15 ) {
+ $next_bill = $main_next_bill;
+ }