110 lines
2.8 KiB
PHP
110 lines
2.8 KiB
PHP
<?php
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namespace App\InvoiceRule;
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use App\InvoiceRuleInterface;
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use App\Ramcar\ServiceType;
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class Tax implements InvoiceRuleInterface
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{
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public function getID()
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{
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return 'tax';
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}
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public function compute($criteria, &$total)
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{
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// check if taxable
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if (!$criteria->isTaxable())
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{
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// nothing to compute
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return [];
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}
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$tax_rate = $this->getTaxRate();
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$is_battery_sales = false;
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$total_price = 0;
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// compute tax per item if service type is battery sales
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$stype = $criteria->getServiceType();
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if ($stype == ServiceType::BATTERY_REPLACEMENT_NEW)
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{
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// get the entries
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$entries = $criteria->getEntries();
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foreach($entries as $entry)
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{
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// check if entry is trade-in
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if (isset($entry['trade_in']))
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{
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// continue to next entry
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continue;
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}
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$battery = $entry['battery'];
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$qty = $entry['qty'];
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$price = $battery->getSellingPrice();
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$vat = $this->getTaxAmount($price, $tax_rate);
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$qty_price = bcmul($price, $qty, 2);
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$qty_vat = bcmul($vat, $qty, 2);
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$price_minus_vat = bcsub($price, $vat, 2);
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$qty_price_minus_vat = bcmul($price_minus_vat, $qty, 2);
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$total['vat'] = bcadd($total['vat'], $qty_vat, 2);
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$total['vat_ex_price'] = bcadd($total['vat_ex_price'], $qty_price_minus_vat, 2);
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}
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}
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else
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{
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// compute VAT after adding all item costs, if service type is not battery sales
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$total_price = $total['total_price'];
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$vat_ex_price = $this->getTaxExclusivePrice($total_price, $tax_rate);
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$vat = bcsub($total_price, $vat_ex_price, 2);
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$total['vat_ex_price'] = $vat_ex_price;
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$total['vat'] = $vat;
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}
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return [];
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}
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public function validatePromo($criteria, $promo_id)
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{
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return false;
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}
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public function validateInvoiceItems($criteria, $invoice_items)
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{
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return null;
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}
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protected function getTaxAmount($price, $tax_rate)
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{
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$vat_ex_price = $this->getTaxExclusivePrice($price, $tax_rate);
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$tax_amount = bcsub($price, $vat_ex_price, 2);
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return $tax_amount;
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}
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protected function getTaxExclusivePrice($price, $tax_rate)
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{
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$tax_ex_price = bcdiv($price, bcadd(1, $tax_rate, 2), 2);
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return $tax_ex_price;
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}
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protected function getTaxRate()
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{
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// TODO: we need to to put this somewhere like in .env
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// so that if any chanages are to be made, we just edit the file
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// instead of the code
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return 0.12;
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}
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}
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