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classes/tax/AverageTaxOfProductsTaxCalculator.php

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+<?php
+/**
+ * Copyright since 2007 PrestaShop SA and Contributors
+ * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Open Software License (OSL 3.0)
+ * that is bundled with this package in the file LICENSE.md.
+ * It is also available through the world-wide-web at this URL:
+ * https://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@prestashop.com so we can send you a copy immediately.
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
+ * versions in the future. If you wish to customize PrestaShop for your
+ * needs please refer to https://devdocs.prestashop.com/ for more information.
+ *
+ * @author    PrestaShop SA and Contributors <contact@prestashop.com>
+ * @copyright Since 2007 PrestaShop SA and Contributors
+ * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ */
+class AverageTaxOfProductsTaxCalculator
+{
+    private $id_order;
+    private $configuration;
+    private $db;
+
+    public $computation_method = 'average_tax_of_products';
+
+    public function __construct(PrestaShop\PrestaShop\Core\Foundation\Database\DatabaseInterface $db, PrestaShop\PrestaShop\Core\ConfigurationInterface $configuration)
+    {
+        $this->db = $db;
+        $this->configuration = $configuration;
+    }
+
+    private function getProductTaxes()
+    {
+        $prefix = $this->configuration->get('_DB_PREFIX_');
+
+        $sql = 'SELECT t.id_tax, t.rate, od.total_price_tax_excl FROM ' . $prefix . 'orders o
+                INNER JOIN ' . $prefix . 'order_detail od ON od.id_order = o.id_order
+                INNER JOIN ' . $prefix . 'order_detail_tax odt ON odt.id_order_detail = od.id_order_detail
+                INNER JOIN ' . $prefix . 'tax t ON t.id_tax = odt.id_tax
+                WHERE o.id_order = ' . (int) $this->id_order;
+
+        return $this->db->select($sql);
+    }
+
+    public function setIdOrder($id_order)
+    {
+        $this->id_order = $id_order;
+
+        return $this;
+    }
+
+    public function getTaxesAmount($price_before_tax, $price_after_tax = null, $round_precision = 2, $round_mode = null)
+    {
+        $amounts_arr = [];
+        $total_base = 0;
+
+        foreach ($this->getProductTaxes() as $row) {
+            if (!array_key_exists($row['id_tax'], $amounts_arr)) {
+                $amounts_arr[$row['id_tax']] = [
+                    'rate' => $row['rate'],
+                    'base' => 0,
+                ];
+            }
+
+            $amounts_arr[$row['id_tax']]['base'] += $row['total_price_tax_excl'];
+            $total_base += $row['total_price_tax_excl'];
+        }
+
+        $amounts = [];
+        foreach ($amounts_arr as $k => $amount) {
+            $amounts[$k] = Tools::ps_round(
+                $price_before_tax * ($amount['base'] / $total_base) * $amount['rate'] / 100,
+                $round_precision,
+                $round_mode
+            );
+        }
+
+        if ($price_after_tax) {
+            $actual_tax = array_sum($amounts);
+
+            Tools::spreadAmount(
+                $price_after_tax - $price_before_tax - $actual_tax,
+                $round_precision,
+                $amounts,
+                'id_tax'
+            );
+        }
+
+        return $amounts;
+    }
+}