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package FS::part_pkg::discount_Mixin;
use strict;
use vars qw( %info );
use Time::Local qw( timelocal );
use List::Util qw( min );
use FS::cust_pkg;
use FS::cust_bill_pkg_discount;
%info = ( 'disabled' => 1 );
=head1 NAME
FS::part_pkg::discount_Mixin - Mixin class for part_pkg:: classes that
can be discounted.
=head1 SYNOPSIS
package FS::part_pkg::...;
use base qw( FS::part_pkg::discount_Mixin );
sub calc_recur {
...
my $discount = $self->calc_discount($cust_pkg, $$sdate, $details, $param);
$charge -= $discount;
...
}
=head METHODS
=item calc_discount
Takes all the arguments of calc_recur. Calculates and returns the amount
by which to reduce the recurring fee; also increments months used on the
discount and generates an invoice detail describing it.
=cut
sub calc_discount {
my($self, $cust_pkg, $sdate, $details, $param ) = @_;
my $conf = new FS::Conf;
my $br = $self->base_recur_permonth($cust_pkg, $sdate);
$br += $param->{'override_charges'} if $param->{'override_charges'};
my $tot_discount = 0;
#UI enforces just 1 for now, will need ordering when they can be stacked
if ( $param->{freq_override} ) {
# When a customer pays for more than one month at a time to receive a
# term discount, freq_override is set to the number of months.
my $real_part_pkg = new FS::part_pkg { $self->hash };
$real_part_pkg->pkgpart($param->{real_pkgpart} || $self->pkgpart);
# Find a discount with that duration...
my @discount = grep { $_->months == $param->{freq_override} }
map { $_->discount } $real_part_pkg->part_pkg_discount;
my $discount = shift @discount;
# and default to bill that many months at once.
$param->{months} = $param->{freq_override} unless $param->{months};
my $error;
if ($discount) {
# Then set the cust_pkg discount.
if ($discount->months == $param->{months}) {
$cust_pkg->discountnum($discount->discountnum);
$error = $cust_pkg->insert_discount;
} else {
$cust_pkg->discountnum(-1);
foreach ( qw( amount percent months ) ) {
my $method = "discountnum_$_";
$cust_pkg->$method($discount->$_);
}
$error = $cust_pkg->insert_discount;
}
die "error discounting using part_pkg_discount: $error" if $error;
}
}
my @cust_pkg_discount = $cust_pkg->cust_pkg_discount_active;
foreach my $cust_pkg_discount ( @cust_pkg_discount ) {
my $discount_left;
my $discount = $cust_pkg_discount->discount;
#UI enforces one or the other (for now? probably for good)
my $amount = 0;
$amount += $discount->amount
if $cust_pkg->pkgpart == $param->{'real_pkgpart'};
$amount += sprintf('%.2f', $discount->percent * $br / 100 );
my $chg_months = defined($param->{'months'}) ?
$param->{'months'} :
$cust_pkg->part_pkg->freq;
my $months = $discount->months
? min( $chg_months,
$discount->months - $cust_pkg_discount->months_used )
: $chg_months;
if (defined $param->{'setup_charge'}) {
next unless $discount->setup;
if ( $discount->percent > 0 ) {
$amount = sprintf('%.2f', $discount->percent * $param->{'setup_charge'} / 100 );
$months = 1;
} elsif ( $discount->amount > 0 && $discount->months == 1) {
$discount_left = $param->{'setup_charge'} - $discount->amount;
$amount = $param->{'setup_charge'} if $discount_left < 0;
$amount = $discount->amount if $discount_left >= 0;
$months = 1;
# transfer remainder of discount, if any, to recur
$param->{'discount_left_recur'}{$discount->discountnum} =
0 - $discount_left if $discount_left < 0;
} else {
next;
}
} elsif ( defined $param->{'discount_left_recur'}{$discount->discountnum}
&& $param->{'discount_left_recur'}{$discount->discountnum} > 0
) {
# use up transferred remainder of discount from setup
$amount = $param->{'discount_left_recur'}{$discount->discountnum};
$param->{'discount_left_recur'}{$discount->discountnum} = 0;
$months = 1;
} elsif ( $discount->setup
&& $discount->months == 1
&& $discount->amount > 0
) {
next;
}
if ( ! defined $param->{'setup_charge'} ) {
if ( $cust_pkg->pkgpart == $param->{'real_pkgpart'} ) {
push @{ $param->{precommit_hooks} }, sub {
my $error = $cust_pkg_discount->increment_months_used($months);
die "error discounting: $error" if $error;
};
}
$amount = min($amount, $br);
$amount *= $months;
}
$amount = sprintf('%.2f', $amount + 0.00000001 ); #so 1.005 rounds to 1.01
next unless $amount > 0;
# transfer remainder of discount, if any, to setup
if ( $discount->setup && $discount->amount > 0
&& (!$discount->months || $discount->months != 1)
&& !defined $param->{'setup_charge'}
)
{
$discount_left = $br - $amount;
if ( $discount_left < 0 ) {
$amount = $br;
$param->{'discount_left_setup'}{$discount->discountnum} =
0 - $discount_left;
}
}
#record details in cust_bill_pkg_discount
my $cust_bill_pkg_discount = new FS::cust_bill_pkg_discount {
'pkgdiscountnum' => $cust_pkg_discount->pkgdiscountnum,
'amount' => $amount,
'months' => $months,
};
push @{ $param->{'discounts'} }, $cust_bill_pkg_discount;
#add details on discount to invoice
my $money_char = $conf->config('money_char') || '$';
$months = sprintf('%.2f', $months) if $months =~ /\./;
my $d = 'Includes ';
$d .= 'setup ' if defined $param->{'setup_charge'};
$d .= 'discount of '. $discount->description_short;
$d .= " for $months month". ( $months!=1 ? 's' : '' ) unless defined $param->{'setup_charge'};
$d .= ": $money_char$amount" if $months != 1 || $discount->percent;
push @$details, $d;
$tot_discount += $amount;
}
sprintf('%.2f', $tot_discount);
}
1;
|
