+ my ($date) = $self->dbh->selectrow_array($query, undef, $self->id);
+
+ return undef unless $date;
+ return ref $date ? $date : $self->db->parse_date($date);
+}
+
+sub calculate_invoice_dates {
+ my ($self, %params) = @_;
+
+ my $period_len = $self->get_period_length;
+ my $cur_date = $self->first_billing_date || $self->start_date;
+ my $end_date = $self->end_date || DateTime->today_local->add(years => 10);
+ my $start_date = $params{past_dates} ? undef : $self->get_previous_billed_period_start_date;
+ $start_date = $start_date ? $start_date->add(days => 1) : $cur_date->clone;
+
+ $start_date = max($start_date, $params{start_date}) if $params{start_date};
+ $end_date = min($end_date, $params{end_date}) if $params{end_date};
+
+ my @dates;
+
+ while ($cur_date <= $end_date) {
+ push @dates, $cur_date->clone if $cur_date >= $start_date;
+
+ $cur_date->add(months => $period_len);
+ }