+=item delete_cust_bill_pay OPTIONS
+
+Deletes all associated cust_bill_pay records.
+
+If option 'unapplied' is a specified, only deletes until
+this object's 'unapplied' value is >= the specified amount.
+(Deletes in order returned by L</cust_bill_pay>.)
+
+=cut
+
+sub delete_cust_bill_pay {
+ my $self = shift;
+ my %opt = @_;
+
+ 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 $unapplied = $self->unapplied; #only need to look it up once
+
+ my $error = '';
+
+ # Maybe we should reverse the order these get deleted in?
+ # ie delete newest first?
+ # keeping consistent with how bop refunds work, for now...
+ foreach my $cust_bill_pay ( $self->cust_bill_pay ) {
+ last if $opt{'unapplied'} && ($unapplied > $opt{'unapplied'});
+ $unapplied += $cust_bill_pay->amount;
+ $error = $cust_bill_pay->delete;
+ last if $error;
+ }
+
+ if ($error) {
+ $dbh->rollback if $oldAutoCommit;
+ return $error;
+ }
+
+ $dbh->commit or die $dbh->errstr if $oldAutoCommit;
+ return '';
+}
+
+=item refund HASHREF
+
+Accepts input for creating a new FS::cust_refund object.
+Unapplies payment from invoices up to the amount of the refund,
+creates the refund and applies payment to refund. Allows entire
+process to be handled in one transaction.
+
+Causes a fatal error if called on CARD or CHEK payments.
+
+=cut
+
+sub refund {
+ my $self = shift;
+ my $hash = shift;
+ die "Cannot call cust_pay->refund on " . $self->payby
+ if grep { $_ eq $self->payby } qw(CARD CHEK);
+
+ 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 = $self->delete_cust_bill_pay('amount' => $hash->{'amount'});
+
+ if ($error) {
+ $dbh->rollback if $oldAutoCommit;
+ return $error;
+ }
+
+ $hash->{'paynum'} = $self->paynum;
+ my $new = new FS::cust_refund ( $hash );
+ $error = $new->insert;
+
+ if ($error) {
+ $dbh->rollback if $oldAutoCommit;
+ return $error;
+ }
+
+ $dbh->commit or die $dbh->errstr if $oldAutoCommit;
+ return '';
+}
+
+### refund_to_unapply/unapply_refund false laziness with FS::cust_credit
+
+=item refund_to_unapply
+
+Returns L<FS::cust_pay_refund> objects that will be deleted by L</unapply_refund>
+(all currently applied refunds that aren't closed.)
+Returns empty list if payment itself is closed.
+
+=cut
+
+sub refund_to_unapply {
+ my $self = shift;
+ return () if $self->closed;
+ qsearch({
+ 'table' => 'cust_pay_refund',
+ 'hashref' => { 'paynum' => $self->paynum },
+ 'addl_from' => 'LEFT JOIN cust_refund USING (refundnum)',
+ 'extra_sql' => "AND cust_refund.closed IS NULL AND cust_refund.source_paynum IS NULL",
+ });
+}
+
+=item unapply_refund
+
+Deletes all objects returned by L</refund_to_unapply>.
+
+=cut
+
+sub unapply_refund {
+ my $self = shift;
+
+ 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;
+
+ foreach my $cust_pay_refund ($self->refund_to_unapply) {
+ my $error = $cust_pay_refund->delete;
+ if ($error) {
+ dbh->rollback if $oldAutoCommit;
+ return $error;
+ }
+ }
+
+ dbh->commit or die dbh->errstr if $oldAutoCommit;
+ return '';
+}
+