2 /**********************************************************************
3 Copyright (C) FrontAccounting, LLC.
4 Released under the terms of the GNU General Public License, GPL,
5 as published by the Free Software Foundation, either version 3
6 of the License, or (at your option) any later version.
7 This program is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY; without even the implied warranty of
9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
10 See the License here <http://www.gnu.org/licenses/gpl-3.0.html>.
11 ***********************************************************************/
12 include_once($path_to_root . "/taxes/db/tax_groups_db.inc");
13 include_once($path_to_root . "/taxes/db/tax_types_db.inc");
14 include_once($path_to_root . "/taxes/db/item_tax_types_db.inc");
16 //---------------------------------------------------------------------------------
18 // returns the price of a given item minus any included taxes
19 // for item $stock_id with line price $price,
20 // with applicable tax rates $tax_group_array or group id $tax_group
22 function get_tax_free_price_for_item($stock_id, $price, $tax_group, $tax_included, $tax_group_array=null)
24 // if price is zero, then can't be taxed !
28 if ($tax_included==0) return $price;
30 // if array already read, then make a copy and use that
32 $ret_tax_array = $tax_group_array;
34 $ret_tax_array = get_tax_group_items_as_array($tax_group);
36 $tax_array = get_taxes_for_item($stock_id, $ret_tax_array);
38 // if no exemptions or taxgroup is empty, then no included/excluded taxes
39 if ($tax_array == null)
42 // to avoid rounding errors we have to just subtract taxes from tax_included price.
44 foreach ($tax_array as $taxitem)
46 $tax_multiplier += $taxitem["rate"];
50 foreach ($tax_array as $taxitem)
52 $tax += round($price*$taxitem['rate']/(100+$tax_multiplier), user_price_dec());
57 // Full price (incl. VAT) for item $stock_id with line price $price,
58 // with tax rates $tax_group_array or applicable group $tax_group
60 function get_full_price_for_item($stock_id, $price, $tax_group, $tax_included, $tax_group_array=null)
62 // if price is zero, then can't be taxed !
66 if ($tax_included==1) return $price;
68 // if array already read, then make a copy and use that
70 $ret_tax_array = $tax_group_array;
72 $ret_tax_array = get_tax_group_items_as_array($tax_group);
74 //print_r($ret_tax_array);
76 $tax_array = get_taxes_for_item($stock_id, $ret_tax_array);
77 // if no exemptions or taxgroup is empty, then no included/excluded taxes
78 if ($tax_array == null)
85 foreach ($tax_array as $taxitem)
87 $tax_multiplier += $taxitem["rate"];
90 return round($price * (1 + ($tax_multiplier / 100)), user_price_dec());
93 //---------------------------------------------------------------------------------
94 // return an array of (tax_type_id, tax_type_name, sales_gl_code, purchasing_gl_code, rate)
96 function get_taxes_for_item($stock_id, $tax_group_items_array)
98 $item_tax_type = get_item_tax_type_for_item($stock_id);
100 // if the item is exempt from all taxes then return 0
101 if ($item_tax_type["exempt"])
104 // get the exemptions for this item tax type
105 $item_tax_type_exemptions_db = get_item_tax_type_exemptions($item_tax_type["id"]);
107 // read them all into an array to minimize db querying
108 $item_tax_type_exemptions = array();
109 while ($item_tax_type_exemp = db_fetch($item_tax_type_exemptions_db))
111 $item_tax_type_exemptions[] = $item_tax_type_exemp["tax_type_id"];
114 $ret_tax_array = array();
116 // if any of the taxes of the tax group are in the exemptions, then skip
117 foreach ($tax_group_items_array as $tax_group_item)
122 // if it's in the exemptions, skip
123 foreach ($item_tax_type_exemptions as $exemption)
125 if (($tax_group_item['tax_type_id'] == $exemption))
134 $index = $tax_group_item['tax_type_id'];
135 $ret_tax_array[$index] = $tax_group_item;
139 return $ret_tax_array;
141 //-----------------------------------------------------------------------------------
142 // return an array of (tax_type_id, tax_type_name, sales_gl_code, purchasing_gl_code, rate, included_in_price, Value)
144 function get_tax_for_items($items, $prices, $shipping_cost, $tax_group, $tax_included=null, $tax_items_array=null, $tax_algorithm = null)
147 $tax_algorithm = get_company_pref('tax_algorithm');
148 // first create and set an array with all the tax types of the tax group
149 if($tax_items_array!=null)
150 $ret_tax_array = $tax_items_array;
152 $ret_tax_array = get_tax_group_items_as_array($tax_group);
154 $dec = user_price_dec();
156 $fully_exempt = true;
157 foreach($ret_tax_array as $k=>$t)
159 if ($t['rate'] !== null)
160 $fully_exempt = false;
161 $ret_tax_array[$k]['Net'] = 0;
164 $ret_tax_array['exempt'] = array('Value'=>0, 'Net'=>0, 'rate' => null, 'tax_type_id' => '');
165 $dec = user_price_dec();
166 // loop for all items
167 for ($i = 0; $i < count($items); $i++)
169 $item_taxes = get_taxes_for_item($items[$i], $ret_tax_array);
170 if ($item_taxes == null || $fully_exempt)
172 $ret_tax_array['exempt']['Value'] += round2(0, $dec);
173 $ret_tax_array['exempt']['Net'] += $prices[$i];
178 foreach ($item_taxes as $taxitem)
180 $tax_multiplier += $taxitem['rate'];
182 foreach ($item_taxes as $item_tax)
184 if ($item_tax['rate'] !== null) {
185 $index = $item_tax['tax_type_id'];
186 if ($tax_included == 1) {
187 $ret_tax_array[$index]['Value'] += round2($prices[$i]*$item_tax['rate']/(100+$tax_multiplier), $dec);
188 $ret_tax_array[$index]['Net'] += round2($prices[$i]*100/(100+$tax_multiplier), $dec);
190 $ret_tax_array[$index]['Value'] += round2($prices[$i] * $item_tax['rate'] / 100, $dec);
191 $ret_tax_array[$index]['Net'] += $prices[$i];
197 // add the shipping taxes, only if non-zero, and only if tax group taxes shipping
198 if ($shipping_cost != 0)
200 $item_taxes = get_shipping_tax_as_array($tax_group);
201 if ($item_taxes != null)
203 if ($tax_included == 1)
206 foreach ($item_taxes as $item_tax)
208 $index = $item_tax['tax_type_id'];
209 if(isset($ret_tax_array[$index])) {
210 $tax_rate += $item_tax['rate'];
213 $shipping_net = round2($shipping_cost*100/(100+$tax_rate), $dec);
215 foreach ($item_taxes as $item_tax)
217 $index = $item_tax['tax_type_id'];
218 if ($item_tax['rate'] !== null && $ret_tax_array[$index]['rate'] !== null) {
219 if($tax_included==1) {
220 $ret_tax_array[$index]['Value'] += round2($shipping_cost*$item_tax['rate']/(100+$tax_rate), $dec);
221 $ret_tax_array[$index]['Net'] += $shipping_net;
223 $ret_tax_array[$index]['Value'] += round2($shipping_cost * $item_tax['rate'] / 100, $dec);
224 $ret_tax_array[$index]['Net'] += $shipping_cost;
231 if ($tax_algorithm == TCA_TOTALS ) {
233 foreach($ret_tax_array as $index => $item_tax) {
234 $ret_tax_array[$index]['Value'] = round2($item_tax['Net'] * $item_tax['rate'] / 100, $dec);
238 return $ret_tax_array;