1 package SL::DB::Helper::PriceTaxCalculator;
5 use parent qw(Exporter);
6 our @EXPORT = qw(calculate_prices_and_taxes _calculate_item);
9 use List::Util qw(sum min max);
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 }) if @{ $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},
43 # set exchangerate in $data>{exchangerate}
44 if ( ref($self) eq 'SL::DB::Order' ) {
45 # orders store amount in the order currency
46 $data{exchangerate} = 1;
48 # invoices store amount in the default currency
49 _get_exchangerate($self, \%data, %params);
50 # $data{exchangerate} = $self->exchangerate; # untested alternative for setting exchangerate
54 $self->marge_total(0);
56 SL::DB::Manager::Chart->cache_taxkeys(date => $self->transdate);
59 foreach my $item ($self->items) {
61 _calculate_item($self, $item, $idx, \%data, %params);
64 _calculate_amounts($self, \%data, %params);
66 return $self unless wantarray;
68 return map { ($_ => $data{$_}) } qw(taxes amounts amounts_cogs allocated exchangerate assembly_items items rounding);
71 sub _get_exchangerate {
72 my ($self, $data, %params) = @_;
74 my $currency = $self->currency_id ? SL::DB::Currency->load_cached($self->currency_id)->name || '' : '';
75 if ($currency ne SL::DB::Default->get_default_currency) {
76 $data->{exchangerate} = $::form->check_exchangerate(\%::myconfig, $currency, $self->transdate, $data->{is_sales} ? 'buy' : 'sell');
77 $data->{exchangerate} ||= $params{exchangerate};
79 $data->{exchangerate} ||= 1;
83 my ($self, $item, $idx, $data, %params) = @_;
85 my $part = SL::DB::Part->load_cached($item->parts_id);
86 return unless $item->part;
88 my $part_unit = $data->{units_by_name}->{ $part->unit };
89 my $item_unit = $data->{units_by_name}->{ $item->unit };
91 croak("Undefined unit " . $part->unit) if !$part_unit;
92 croak("Undefined unit " . $item->unit) if !$item_unit;
94 $item->base_qty($item_unit->convert_to($item->qty, $part_unit));
95 $item->fxsellprice($item->sellprice) if $data->{is_invoice};
97 my $num_dec = max 2, _num_decimal_places($item->sellprice);
98 my $discount = _round($item->sellprice * ($item->discount || 0), $num_dec);
99 my $sellprice = _round($item->sellprice - $discount, $num_dec);
101 $item->price_factor( ! $item->price_factor_obj ? 1 : ($item->price_factor_obj->factor || 1));
102 $item->marge_price_factor(! $part->price_factor ? 1 : ($part->price_factor->factor || 1));
103 my $linetotal = _round($sellprice * $item->qty / $item->price_factor, 2) * $data->{exchangerate};
104 $linetotal = _round($linetotal, 2);
106 $data->{invoicediff} += $sellprice * $item->qty * $data->{exchangerate} / $item->price_factor - $linetotal if $self->taxincluded;
108 my $linetotal_cost = 0;
111 $item->marge_total( 0);
112 $item->marge_percent(0);
115 my $lastcost = ! ($item->lastcost * 1) ? ($part->lastcost || 0) : $item->lastcost;
116 $linetotal_cost = _round($lastcost * $item->qty / $item->marge_price_factor, 2);
118 $item->marge_total( $linetotal - $linetotal_cost);
119 $item->marge_percent($item->marge_total * 100 / $linetotal);
121 $self->marge_total( $self->marge_total + $item->marge_total);
122 $data->{lastcost_total} += $linetotal_cost;
125 my $taxkey = $part->get_taxkey(date => $self->transdate, is_sales => $data->{is_sales}, taxzone => $self->taxzone_id);
126 my $tax_rate = $taxkey->tax->rate;
127 my $tax_amount = undef;
129 if ($self->taxincluded) {
130 $tax_amount = $linetotal * $tax_rate / ($tax_rate + 1);
131 $sellprice = $sellprice / ($tax_rate + 1);
134 $tax_amount = $linetotal * $tax_rate;
137 if ($taxkey->tax->chart_id) {
138 $data->{taxes}->{ $taxkey->tax->chart_id } ||= 0;
139 $data->{taxes}->{ $taxkey->tax->chart_id } += $tax_amount;
140 } elsif ($tax_amount) {
141 die "tax_amount != 0 but no chart_id for taxkey " . $taxkey->id . " tax " . $taxkey->tax->id;
144 $self->netamount($self->netamount + $sellprice * $item->qty / $item->price_factor);
146 my $chart = $part->get_chart(type => $data->{is_sales} ? 'income' : 'expense', taxzone => $self->taxzone_id);
147 $data->{amounts}->{ $chart->id } ||= { taxkey => $taxkey->taxkey_id, tax_id => $taxkey->tax_id, amount => 0 };
148 $data->{amounts}->{ $chart->id }->{amount} += $linetotal;
149 $data->{amounts}->{ $chart->id }->{amount} -= $tax_amount if $self->taxincluded;
151 push @{ $data->{assembly_items} }, [];
152 if ($part->is_assembly) {
153 _calculate_assembly_item($self, $data, $part, $item->base_qty, $item_unit->convert_to(1, $part_unit));
154 } elsif ($part->is_part) {
155 if ($data->{is_invoice}) {
156 $item->allocated(_calculate_part_item($self, $data, $part, $item->base_qty, $item_unit->convert_to(1, $part_unit)));
160 $data->{last_incex_chart_id} = $chart->id if $data->{is_sales};
162 push @{ $data->{items} }, {
163 linetotal => $linetotal,
164 linetotal_cost => $linetotal_cost,
165 sellprice => $sellprice,
166 tax_amount => $tax_amount,
167 taxkey_id => $taxkey->id,
170 _dbg("CALCULATE! ${idx} i.qty " . $item->qty . " i.sellprice " . $item->sellprice . " sellprice $sellprice num_dec $num_dec taxamount $tax_amount " .
171 "i.linetotal $linetotal netamount " . $self->netamount . " marge_total " . $item->marge_total . " marge_percent " . $item->marge_percent);
174 sub _calculate_amounts {
175 my ($self, $data, %params) = @_;
178 foreach my $chart_id (keys %{ $data->{taxes} }) {
179 my $rounded = _round($data->{taxes}->{$chart_id} * $data->{exchangerate}, 2);
180 $tax_diff += $data->{taxes}->{$chart_id} * $data->{exchangerate} - $rounded if $self->taxincluded;
181 $data->{taxes}->{$chart_id} = $rounded;
184 my $amount = _round(($self->netamount + $tax_diff) * $data->{exchangerate}, 2);
185 my $diff = $amount - ($self->netamount + $tax_diff) * $data->{exchangerate};
186 my $netamount = $amount;
188 if ($self->taxincluded) {
189 $data->{invoicediff} += $diff;
190 $data->{amounts}->{ $data->{last_incex_chart_id} }->{amount} += $data->{invoicediff} if $data->{last_incex_chart_id};
193 _dbg("Sna " . $self->netamount . " idiff " . $data->{invoicediff} . " tdiff ${tax_diff}");
195 my $tax = sum values %{ $data->{taxes} };
196 $amount = $netamount + $tax;
197 my $grossamount = _round($amount, 2, 1);
198 $data->{rounding} = _round($grossamount - $amount, 2);
199 $data->{arap_amount} = $grossamount;
201 $self->netamount( $netamount);
202 $self->amount( $grossamount);
203 $self->marge_percent($self->netamount ? ($self->netamount - $data->{lastcost_total}) * 100 / $self->netamount : 0);
206 sub _calculate_assembly_item {
207 my ($self, $data, $part, $total_qty, $base_factor) = @_;
209 return 0 if $::instance_conf->get_inventory_system eq 'periodic' || !$data->{is_invoice};
211 foreach my $assembly_entry (@{ $part->assemblies }) {
212 push @{ $data->{assembly_items}->[-1] }, { part => $assembly_entry->part,
213 qty => $total_qty * $assembly_entry->qty,
216 if ($assembly_entry->part->is_assembly) {
217 _calculate_assembly_item($self, $data, $assembly_entry->part, $total_qty * $assembly_entry->qty);
218 } elsif ($assembly_entry->part->is_part) {
219 my $allocated = _calculate_part_item($self, $data, $assembly_entry->part, $total_qty * $assembly_entry->qty);
220 $data->{assembly_items}->[-1]->[-1]->{allocated} = $allocated;
225 sub _calculate_part_item {
226 my ($self, $data, $part, $total_qty, $base_factor) = @_;
228 _dbg("cpsi tq " . $total_qty);
230 return 0 if $::instance_conf->get_inventory_system eq 'periodic' || !$data->{is_invoice} || !$total_qty;
234 my $remaining_qty = $total_qty;
235 my $expense_income_chart = $part->get_chart(type => $data->{is_sales} ? 'expense' : 'income', taxzone => $self->taxzone_id);
236 my $inventory_chart = $part->get_chart(type => 'inventory', taxzone => $self->taxzone_id);
238 my $iterator = SL::DB::Manager::InvoiceItem->get_all_iterator(query => [ and => [ parts_id => $part->id,
239 \'(base_qty + allocated) < 0' ] ]);
241 while (($remaining_qty > 0) && ($entry = $iterator->next)) {
242 my $qty = min($remaining_qty, $entry->base_qty * -1 - $entry->allocated - $data->{allocated}->{ $entry->id });
247 my $linetotal = _round(($entry->sellprice * $qty) / $base_factor, 2);
249 $data->{amounts_cogs}->{ $expense_income_chart->id } -= $linetotal;
250 $data->{amounts_cogs}->{ $inventory_chart->id } += $linetotal;
252 $data->{allocated}->{ $entry->id } ||= 0;
253 $data->{allocated}->{ $entry->id } += $qty;
254 $remaining_qty -= $qty;
259 return $remaining_qty - $total_qty;
263 return $::form->round_amount(@_);
266 sub _num_decimal_places {
267 return length( (split(/\./, '' . ($_[0] * 1), 2))[1] || '' );
271 # $::lxdebug->message(0, join(' ', @_));
283 SL::DB::Helper::PriceTaxCalculator - Mixin for calculating the prices,
284 amounts and taxes of orders, quotations, invoices
290 =item C<calculate_prices_and_taxes %params>
292 Calculates the prices, amounts and taxes for an order, a quotation or
295 The function assumes that the mixing package has a certain layout and
296 provides certain functions:
304 =item C<customer> or C<vendor>
306 Determines if the record is a sales or purchase record.
310 Accessor returning all line items for this record. The line items
311 themselves must again have a certain layout. Instances of
312 L<SL::DB::OrderItem> and L<SL::DB::InvoiceItem> are supported.
316 The following values are calculated and set for C<$self>: C<amount>,
317 C<netamount>, C<marge_percent>, C<marge_total>.
319 The following values are calculated and set for each line item:
320 C<base_qty>, C<price_factor>, C<marge_price_factor>, C<marge_total>,
323 The objects are not saved.
325 Returns C<$self> in scalar context.
327 In array context a hash with the following keys is returned:
333 A hash reference with the calculated taxes. The keys are chart IDs,
334 the values the calculated taxes.
338 A hash reference with the calculated amounts. The keys are chart IDs,
339 the values are hash references containing the two keys C<amount> and
342 =item C<amounts_cogs>
344 A hash reference with the calculated amounts for costs of goods
345 sold. The keys are chart IDs, the values the calculated amounts.
347 =item C<assembly_items>
349 An array reference with as many entries as there are items in the
350 record. Each entry is again an array reference of hash references with
351 the keys C<part> (an instance of L<SL::DB::Part>), C<qty> and
352 C<allocated>. Is only valid for invoices and can be used to populate
353 the C<invoice> table with entries for assemblies.
357 A hash reference. The keys are IDs of entries in the C<invoice>
358 table. The values are the new values for the entry's C<allocated>
359 column. Only valid for invoices.
361 =item C<exchangerate>
363 The exchangerate used for the calculation.
367 An array reference. For each line item this array contains a hash ref
368 entry with additional values that have been calculated for that item
369 but that aren't stored in the item object itself. These include
370 C<linetotal>, C<linetotal_cost>, C<sellprice>, C<tax_amount> and
373 The items are stored in the same order the items are stored in the
374 object that L</calculate_prices_and_taxes> has been called on.
378 my $invoice = SL::DB::Invoice->new(id => 12345)->load;
379 my %data = $invoice->calculate_prices_and_taxes;
381 print "line total of second item: " . $data{items}->[1]->{linetotal};
393 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>