1 package SL::DB::Helper::PriceTaxCalculator;
5 use parent qw(Exporter);
6 our @EXPORT = qw(calculate_prices_and_taxes);
9 use List::Util qw(sum min);
11 sub calculate_prices_and_taxes {
12 my ($self, %params) = @_;
14 require SL::DB::Chart;
15 require SL::DB::Currency;
16 require SL::DB::Default;
17 require SL::DB::InvoiceItem;
19 require SL::DB::PriceFactor;
22 SL::DB::Part->load_cached(map { $_->parts_id } @{ $self->items });
24 my %units_by_name = map { ( $_->name => $_ ) } @{ SL::DB::Manager::Unit->get_all };
25 my %price_factors_by_id = map { ( $_->id => $_ ) } @{ SL::DB::Manager::PriceFactor->get_all };
27 my %data = ( lastcost_total => 0,
29 last_incex_chart_id => undef,
30 units_by_name => \%units_by_name,
31 price_factors_by_id => \%price_factors_by_id,
36 assembly_items => [ ],
37 exchangerate => undef,
38 is_sales => $self->can('customer') && $self->customer,
39 is_invoice => (ref($self) =~ /Invoice/) || $params{invoice},
42 _get_exchangerate($self, \%data, %params);
45 $self->marge_total(0);
47 SL::DB::Manager::Chart->cache_taxkeys(date => $self->transdate);
50 foreach my $item ($self->items) {
52 _calculate_item($self, $item, $idx, \%data, %params);
55 _calculate_amounts($self, \%data, %params);
57 return $self unless wantarray;
59 return map { ($_ => $data{$_}) } qw(taxes amounts amounts_cogs allocated exchangerate assembly_items);
62 sub _get_exchangerate {
63 my ($self, $data, %params) = @_;
65 my $currency = $self->currency_id ? SL::DB::Currency->load_cached($self->currency_id)->name || '' : '';
66 if ($currency ne SL::DB::Default->get_default_currency) {
67 $data->{exchangerate} = $::form->check_exchangerate(\%::myconfig, $currency, $self->transdate, $data->{is_sales} ? 'buy' : 'sell');
68 $data->{exchangerate} ||= $params{exchangerate};
70 $data->{exchangerate} ||= 1;
74 my ($self, $item, $idx, $data, %params) = @_;
76 my $part = SL::DB::Part->load_cached($item->parts_id);
77 my $part_unit = $data->{units_by_name}->{ $part->unit };
78 my $item_unit = $data->{units_by_name}->{ $item->unit };
80 croak("Undefined unit " . $part->unit) if !$part_unit;
81 croak("Undefined unit " . $item->unit) if !$item_unit;
83 $item->base_qty($item_unit->convert_to($item->qty, $part_unit));
84 $item->fxsellprice($item->sellprice) if $data->{is_invoice};
86 my $num_dec = _num_decimal_places($item->sellprice) || 2;
87 # ^ we need at least 2 decimal places ^
88 # my test case 43.00 € with 0 decimal places and 0.5 discount ->
89 # : sellprice before:43.00000
91 # : discount / sellprice ratio: 22 / 21
92 # : discount = 43 * 0.5 _round(21.5, 0) = 22
93 # TODO write a test case
94 my $discount = _round($item->sellprice * ($item->discount || 0), $num_dec);
95 my $sellprice = _round($item->sellprice - $discount, $num_dec);
97 $item->price_factor( ! $item->price_factor_obj ? 1 : ($item->price_factor_obj->factor || 1));
98 $item->marge_price_factor(! $part->price_factor ? 1 : ($part->price_factor->factor || 1));
99 my $linetotal = _round($sellprice * $item->qty / $item->price_factor, 2) * $data->{exchangerate};
100 $linetotal = _round($linetotal, 2);
102 $data->{invoicediff} += $sellprice * $item->qty * $data->{exchangerate} / $item->price_factor - $linetotal if $self->taxincluded;
105 $item->marge_total( 0);
106 $item->marge_percent(0);
109 my $lastcost = ! ($item->lastcost * 1) ? ($part->lastcost || 0) : $item->lastcost;
110 my $linetotal_cost = _round($lastcost * $item->qty / $item->marge_price_factor, 2);
112 $item->marge_total( $linetotal - $linetotal_cost);
113 $item->marge_percent($item->marge_total * 100 / $linetotal);
115 $self->marge_total( $self->marge_total + $item->marge_total);
116 $data->{lastcost_total} += $linetotal_cost;
119 my $taxkey = $part->get_taxkey(date => $self->transdate, is_sales => $data->{is_sales}, taxzone => $self->taxzone_id);
120 my $tax_rate = $taxkey->tax->rate;
121 my $tax_amount = undef;
123 if ($self->taxincluded) {
124 $tax_amount = $linetotal * $tax_rate / ($tax_rate + 1);
125 $sellprice = $sellprice / ($tax_rate + 1);
128 $tax_amount = $linetotal * $tax_rate;
131 if ($taxkey->tax->chart_id) {
132 $data->{taxes}->{ $taxkey->tax->chart_id } ||= 0;
133 $data->{taxes}->{ $taxkey->tax->chart_id } += $tax_amount;
134 } elsif ($tax_amount) {
135 die "tax_amount != 0 but no chart_id for taxkey " . $taxkey->id . " tax " . $taxkey->tax->id;
138 $self->netamount($self->netamount + $sellprice * $item->qty / $item->price_factor);
140 my $chart = $part->get_chart(type => $data->{is_sales} ? 'income' : 'expense', taxzone => $self->taxzone_id);
141 $data->{amounts}->{ $chart->id } ||= { taxkey => $taxkey->taxkey_id, tax_id => $taxkey->tax_id, amount => 0 };
142 $data->{amounts}->{ $chart->id }->{amount} += $linetotal;
143 $data->{amounts}->{ $chart->id }->{amount} -= $tax_amount if $self->taxincluded;
145 push @{ $data->{assembly_items} }, [];
146 if ($part->is_assembly) {
147 _calculate_assembly_item($self, $data, $part, $item->base_qty, $item_unit->convert_to(1, $part_unit));
148 } elsif ($part->is_part) {
149 if ($data->{is_invoice}) {
150 $item->allocated(_calculate_part_item($self, $data, $part, $item->base_qty, $item_unit->convert_to(1, $part_unit)));
154 $data->{last_incex_chart_id} = $chart->id if $data->{is_sales};
156 _dbg("CALCULATE! ${idx} i.qty " . $item->qty . " i.sellprice " . $item->sellprice . " sellprice $sellprice num_dec $num_dec taxamount $tax_amount " .
157 "i.linetotal $linetotal netamount " . $self->netamount . " marge_total " . $item->marge_total . " marge_percent " . $item->marge_percent);
160 sub _calculate_amounts {
161 my ($self, $data, %params) = @_;
164 foreach my $chart_id (keys %{ $data->{taxes} }) {
165 my $rounded = _round($data->{taxes}->{$chart_id} * $data->{exchangerate}, 2);
166 $tax_diff += $data->{taxes}->{$chart_id} * $data->{exchangerate} - $rounded if $self->taxincluded;
167 $data->{taxes}->{$chart_id} = $rounded;
170 my $amount = _round(($self->netamount + $tax_diff) * $data->{exchangerate}, 2);
171 my $diff = $amount - ($self->netamount + $tax_diff) * $data->{exchangerate};
172 my $netamount = $amount;
174 if ($self->taxincluded) {
175 $data->{invoicediff} += $diff;
176 $data->{amounts}->{ $data->{last_incex_chart_id} }->{amount} += $data->{invoicediff} if $data->{last_incex_chart_id};
179 _dbg("Sna " . $self->netamount . " idiff " . $data->{invoicediff} . " tdiff ${tax_diff}");
181 my $tax = sum values %{ $data->{taxes} };
182 $data->{arap_amount} = $netamount + $tax;
184 $self->netamount( $netamount);
185 $self->amount( $netamount + $tax);
186 $self->marge_percent($self->netamount ? ($self->netamount - $data->{lastcost_total}) * 100 / $self->netamount : 0);
189 sub _calculate_assembly_item {
190 my ($self, $data, $part, $total_qty, $base_factor) = @_;
192 return 0 if $::instance_conf->get_inventory_system eq 'periodic' || !$data->{is_invoice};
194 foreach my $assembly_entry (@{ $part->assemblies }) {
195 push @{ $data->{assembly_items}->[-1] }, { part => $assembly_entry->part,
196 qty => $total_qty * $assembly_entry->qty,
199 if ($assembly_entry->part->is_assembly) {
200 _calculate_assembly_item($self, $data, $assembly_entry->part, $total_qty * $assembly_entry->qty);
201 } elsif ($assembly_entry->part->is_part) {
202 my $allocated = _calculate_part_item($self, $data, $assembly_entry->part, $total_qty * $assembly_entry->qty);
203 $data->{assembly_items}->[-1]->[-1]->{allocated} = $allocated;
208 sub _calculate_part_item {
209 my ($self, $data, $part, $total_qty, $base_factor) = @_;
211 _dbg("cpsi tq " . $total_qty);
213 return 0 if $::instance_conf->get_inventory_system eq 'periodic' || !$data->{is_invoice} || !$total_qty;
217 my $remaining_qty = $total_qty;
218 my $expense_income_chart = $part->get_chart(type => $data->{is_sales} ? 'expense' : 'income', taxzone => $self->taxzone_id);
219 my $inventory_chart = $part->get_chart(type => 'inventory', taxzone => $self->taxzone_id);
221 my $iterator = SL::DB::Manager::InvoiceItem->get_all_iterator(query => [ and => [ parts_id => $part->id,
222 \'(base_qty + allocated) < 0' ] ]);
224 while (($remaining_qty > 0) && ($entry = $iterator->next)) {
225 my $qty = min($remaining_qty, $entry->base_qty * -1 - $entry->allocated - $data->{allocated}->{ $entry->id });
230 my $linetotal = _round(($entry->sellprice * $qty) / $base_factor, 2);
232 $data->{amounts_cogs}->{ $expense_income_chart->id } -= $linetotal;
233 $data->{amounts_cogs}->{ $inventory_chart->id } += $linetotal;
235 $data->{allocated}->{ $entry->id } ||= 0;
236 $data->{allocated}->{ $entry->id } += $qty;
237 $remaining_qty -= $qty;
242 return $remaining_qty - $total_qty;
246 return $::form->round_amount(@_);
249 sub _num_decimal_places {
250 return length( (split(/\./, '' . ($_[0] * 1), 2))[1] || '' );
254 # $::lxdebug->message(0, join(' ', @_));
266 SL::DB::Helper::PriceTaxCalculator - Mixin for calculating the prices,
267 amounts and taxes of orders, quotations, invoices
273 =item C<calculate_prices_and_taxes %params>
275 Calculates the prices, amounts and taxes for an order, a quotation or
278 The function assumes that the mixing package has a certain layout and
279 provides certain functions:
287 =item C<customer> or C<vendor>
289 Determines if the record is a sales or purchase record.
293 Accessor returning all line items for this record. The line items
294 themselves must again have a certain layout. Instances of
295 L<SL::DB::OrderItem> and L<SL::DB::InvoiceItem> are supported.
299 The following values are calculated and set for C<$self>: C<amount>,
300 C<netamount>, C<marge_percent>, C<marge_total>.
302 The following values are calculated and set for each line item:
303 C<base_qty>, C<price_factor>, C<marge_price_factor>, C<marge_total>,
306 The objects are not saved.
308 Returns C<$self> in scalar context.
310 In array context a hash with the following keys is returned:
316 A hash reference with the calculated taxes. The keys are chart IDs,
317 the values the calculated taxes.
321 A hash reference with the calculated amounts. The keys are chart IDs,
322 the values are hash references containing the two keys C<amount> and
325 =item C<amounts_cogs>
327 A hash reference with the calculated amounts for costs of goods
328 sold. The keys are chart IDs, the values the calculated amounts.
330 =item C<assembly_items>
332 An array reference with as many entries as there are items in the
333 record. Each entry is again an array reference of hash references with
334 the keys C<part> (an instance of L<SL::DB::Part>), C<qty> and
335 C<allocated>. Is only valid for invoices and can be used to populate
336 the C<invoice> table with entries for assemblies.
340 A hash reference. The keys are IDs of entries in the C<invoice>
341 table. The values are the new values for the entry's C<allocated>
342 column. Only valid for invoices.
344 =item C<exchangerate>
346 The exchangerate used for the calculation.
358 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>