kivitendo/SL/DB/Helper/PriceUpdater.pm @ 8734f2e2
| 3b70d2a0 | Moritz Bunkus | package SL::DB::Helper::PriceUpdater;
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use strict;
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use parent qw(Exporter);
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our @EXPORT = qw(update_prices);
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use Carp;
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sub update_prices {
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my $self = shift;
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my %params = @_;
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croak('Missing parameters amount/percent') unless $params{amount} || $params{percent};
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my @prices = ref $params{prices} eq 'ARRAY' ? @{ $params{prices} } : ( $params{prices} || 'sellprice' );
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foreach my $field (@prices) {
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my $rounding_error = 0;
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foreach my $item (@{ $self->items }) {
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my $new_price;
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if ($params{amount}) {
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$new_price = $item->$field + $params{amount} + $rounding_error;
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} else {
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$new_price = $item->$field * $params{percent} / 100 + $rounding_error;
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}
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$item->$field($::form->round_amount($new_price, 2));
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$rounding_error += $new_price - $item->$field;
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_dbg("new_price $new_price new_price_no_err " . ($new_price - $rounding_error) . " rounded " . $item->$field .
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" error_old " . ($rounding_error - $new_price + $item->$field) . " error_new $rounding_error");
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}
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}
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return $self->calculate_prices_and_taxes if $params{calculate};
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return $self;
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}
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sub _dbg {
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# $::lxdebug->message(0, __PACKAGE__ . ': ' . join(' ', @_));
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}
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1;
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__END__
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=encoding utf8
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=head1 NAME
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SL::DB::Helper::PriceUpdater - Mixin for updating all prices by a fixed amount or by a percentage
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=head1 FUNCTIONS
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=over 4
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=item C<update_prices %params>
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Updates the prices of all items as returned by the function C<items>
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provided by the mixing class.
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Supported arguments via C<%params> are:
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=over 2
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=item C<amount>
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Absolute amount to add or subtract. Either C<amount> or C<percent>
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must be given. Resulting prices are rounded to two significant places.
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=item C<percent>
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Percentage to set the prices to (with 100 meaning "no
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change"). Resulting prices are rounded to two significant
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places. Rounding errors are carried over to the next item.
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Either C<amount> or C<percent> must be given.
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=item C<prices>
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A string or an array of strings naming the prices to update. If
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missing only the C<sellprice> field will be updated.
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=item C<calculate>
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If trueish the all prices, taxes and amounts are re-calculated by
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calling
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L<SL::DB::Helper::PriceTaxCalculator::calculate_prices_and_taxes>.
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Returns that function's result.
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=back
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Returns C<$self> unless C<$params{calculate}> is trueish.
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=back
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=head1 EXPORTS
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This mixin exports the function L</update_prices>.
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=head1 BUGS
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Nothing here yet.
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=head1 AUTHOR
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Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>
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=cut
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