+Options may be passed as a list of key/value pairs or as a hash reference.
+Options are:
+
+=over 4
+
+=item locaitonnum
+
+New locationnum, to change the location for this package.
+
+=item cust_location
+
+New FS::cust_location object, to create a new location and assign it
+to this package.
+
+=item pkgpart
+
+New pkgpart (see L<FS::part_pkg>).
+
+=item refnum
+
+New refnum (see L<FS::part_referral>).
+
+=back
+
+At least one option must be specified (otherwise, what's the point?)
+
+Returns either the new FS::cust_pkg object or a scalar error.
+
+For example:
+
+ my $err_or_new_cust_pkg = $old_cust_pkg->change
+
+=cut
+
+#some false laziness w/order
+sub change {
+ my $self = shift;
+ my $opt = ref($_[0]) ? shift : { @_ };
+
+# my ($custnum, $pkgparts, $remove_pkgnum, $return_cust_pkg, $refnum) = @_;
+#
+
+ my $conf = new FS::Conf;
+
+ # Transactionize this whole mess
+ local $SIG{HUP} = 'IGNORE';
+ local $SIG{INT} = 'IGNORE';
+ local $SIG{QUIT} = 'IGNORE';
+ local $SIG{TERM} = 'IGNORE';
+ local $SIG{TSTP} = 'IGNORE';
+ local $SIG{PIPE} = 'IGNORE';
+
+ my $oldAutoCommit = $FS::UID::AutoCommit;
+ local $FS::UID::AutoCommit = 0;
+ my $dbh = dbh;
+
+ my $error;
+
+ my %hash = ();
+
+ my $time = time;
+
+ #$hash{$_} = $self->$_() foreach qw( last_bill bill );
+
+ #$hash{$_} = $self->$_() foreach qw( setup );
+
+ $hash{'setup'} = $time if $self->setup;
+
+ $hash{'change_date'} = $time;
+ $hash{"change_$_"} = $self->$_()
+ foreach qw( pkgnum pkgpart locationnum );
+
+ if ( $opt->{'cust_location'} &&
+ ( ! $opt->{'locationnum'} || $opt->{'locationnum'} == -1 ) ) {
+ $error = $opt->{'cust_location'}->insert;
+ if ( $error ) {
+ $dbh->rollback if $oldAutoCommit;
+ return "inserting cust_location (transaction rolled back): $error";
+ }
+ $opt->{'locationnum'} = $opt->{'cust_location'}->locationnum;
+ }
+
+ # Create the new package.
+ my $cust_pkg = new FS::cust_pkg {
+ custnum => $self->custnum,
+ pkgpart => ( $opt->{'pkgpart'} || $self->pkgpart ),
+ refnum => ( $opt->{'refnum'} || $self->refnum ),
+ locationnum => ( $opt->{'locationnum'} || $self->locationnum ),
+ %hash,
+ };
+
+ $error = $cust_pkg->insert( 'change' => 1 );
+ if ($error) {
+ $dbh->rollback if $oldAutoCommit;
+ return $error;
+ }
+
+ # Transfer services and cancel old package.
+
+ $error = $self->transfer($cust_pkg);
+ if ($error and $error == 0) {
+ # $old_pkg->transfer failed.
+ $dbh->rollback if $oldAutoCommit;
+ return $error;
+ }
+
+ if ( $error > 0 && $conf->exists('cust_pkg-change_svcpart') ) {
+ warn "trying transfer again with change_svcpart option\n" if $DEBUG;
+ $error = $self->transfer($cust_pkg, 'change_svcpart'=>1 );
+ if ($error and $error == 0) {
+ # $old_pkg->transfer failed.
+ $dbh->rollback if $oldAutoCommit;
+ return $error;
+ }
+ }
+
+ if ($error > 0) {
+ # Transfers were successful, but we still had services left on the old
+ # package. We can't change the package under this circumstances, so abort.
+ $dbh->rollback if $oldAutoCommit;
+ return "Unable to transfer all services from package ". $self->pkgnum;
+ }
+
+ #reset usage if changing pkgpart
+ # AND usage rollover is off (otherwise adds twice, now and at package bill)
+ if ($self->pkgpart != $cust_pkg->pkgpart) {
+ my $part_pkg = $cust_pkg->part_pkg;
+ $error = $part_pkg->reset_usage($cust_pkg, $part_pkg->is_prepaid
+ ? ()
+ : ( 'null' => 1 )
+ )
+ if $part_pkg->can('reset_usage') && ! $part_pkg->option('usage_rollover');
+
+ if ($error) {
+ $dbh->rollback if $oldAutoCommit;
+ return "Error setting usage values: $error";
+ }
+ }
+
+ #Good to go, cancel old package.
+ $error = $self->cancel( quiet=>1 );
+ if ($error) {
+ $dbh->rollback if $oldAutoCommit;
+ return $error;
+ }
+
+ if ( $conf->exists('cust_pkg-change_pkgpart-bill_now') ) {
+ #$self->cust_main
+ my $error = $cust_pkg->cust_main->bill( 'pkg_list' => [ $cust_pkg ] );
+ if ( $error ) {
+ $dbh->rollback if $oldAutoCommit;
+ return $error;
+ }
+ }
+
+ $dbh->commit or die $dbh->errstr if $oldAutoCommit;
+
+ $cust_pkg;
+
+}
+
+=item last_bill
+
+Returns the last bill date, or if there is no last bill date, the setup date.
+Useful for billing metered services.
+
+=cut
+
+sub last_bill {
+ my $self = shift;
+ return $self->setfield('last_bill', $_[0]) if @_;
+ return $self->getfield('last_bill') if $self->getfield('last_bill');
+ my $cust_bill_pkg = qsearchs('cust_bill_pkg', { 'pkgnum' => $self->pkgnum,
+ 'edate' => $self->bill, } );
+ $cust_bill_pkg ? $cust_bill_pkg->sdate : $self->setup || 0;
+}
+
+=item last_cust_pkg_reason ACTION
+
+Returns the most recent ACTION FS::cust_pkg_reason associated with the package.
+Returns false if there is no reason or the package is not currenly ACTION'd
+ACTION is one of adjourn, susp, cancel, or expire.
+
+=cut
+
+sub last_cust_pkg_reason {
+ my ( $self, $action ) = ( shift, shift );
+ my $date = $self->get($action);
+ qsearchs( {
+ 'table' => 'cust_pkg_reason',
+ 'hashref' => { 'pkgnum' => $self->pkgnum,
+ 'action' => substr(uc($action), 0, 1),
+ 'date' => $date,
+ },
+ 'order_by' => 'ORDER BY num DESC LIMIT 1',
+ } );
+}
+
+=item last_reason ACTION
+
+Returns the most recent ACTION FS::reason associated with the package.
+Returns false if there is no reason or the package is not currenly ACTION'd
+ACTION is one of adjourn, susp, cancel, or expire.
+
+=cut
+
+sub last_reason {
+ my $cust_pkg_reason = shift->last_cust_pkg_reason(@_);
+ $cust_pkg_reason->reason
+ if $cust_pkg_reason;
+}
+
+=item part_pkg
+
+Returns the definition for this billing item, as an FS::part_pkg object (see
+L<FS::part_pkg>).
+
+=cut
+
+sub part_pkg {
+ my $self = shift;
+ return $self->{'_pkgpart'} if $self->{'_pkgpart'};
+ cluck "cust_pkg->part_pkg called" if $DEBUG > 1;
+ qsearchs( 'part_pkg', { 'pkgpart' => $self->pkgpart } );
+}
+
+=item old_cust_pkg
+
+Returns the cancelled package this package was changed from, if any.
+
+=cut
+
+sub old_cust_pkg {