Update to 2.1.2 with new override and selection of tax rule

config.xml

@@ -1,12 +1,11 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <module>
     <name>vatchecker</name>
-    <displayName><![CDATA[Vat Checker]]></displayName>
-    <version><![CDATA[2.1.0]]></version>
-    <description><![CDATA[Check if a customers VAT number is valid and gives the customer 0 tax if the customer is not in from country.]]></description>
+    <displayName><![CDATA[VAT Checker]]></displayName>
+    <version><![CDATA[2.1.2]]></version>
+    <description><![CDATA[The module verifies whether a customer possesses a valid VAT EU number through the VIES VAT online service. Upon validation, it automatically applies a 0% tax rate to customers from the EU who are not from the same country as the shop.]]></description>
     <author><![CDATA[Inform-All & Keraweb]]></author>
     <tab><![CDATA[billing_invoicing]]></tab>
     <is_configurable>1</is_configurable>
     <need_instance>1</need_instance>
-	<limited_countries></limited_countries>
-</module>
+</module>

override/classes/Product.php

@@ -0,0 +1,54 @@
+<?php
+
+class Product extends ProductCore
+{
+	public static function getIdTaxRulesGroupByIdProduct( $id_product, Context $context = null )
+	{
+		if ( ! $context ) {
+			$context = Context::getContext();
+		}
+		if(!empty($context->cart->id_address_delivery))
+		{
+			$delivery_address = new Address( $context->cart->id_address_delivery );
+		}else{
+			$delivery_address = false;
+		}
+
+		$key = 'product_id_tax_rules_group_' . (int) $id_product . '_' . (int) $context->shop->id;
+
+		if ( $delivery_address ) {
+			/** @var Vatchecker $vatchecker */
+			$vatchecker = Module::getInstanceByName( 'vatchecker' );
+			if ( $vatchecker && $vatchecker->canOrderWithoutVat( $delivery_address ) ) {
+				// VatChecker module is used.
+				$skipProduct = Db::getInstance()->getRow(
+					'SELECT `id_product`
+        			 FROM `' . _DB_PREFIX_ . 'vatchecker_excluded_products`
+                     WHERE `id_product` =' . (int) $id_product
+				);
+				if ( empty($skipProduct) ) {
+					$taxRuleGroupId = Configuration::get( 'VATCHECKER_TAXRATE_RULE' );
+					if ( ! Cache::isStored( $key ) ) {
+						Cache::store( $key, (int) $taxRuleGroupId );
+					}
+
+					return (int) $taxRuleGroupId;
+				}
+			}
+		}
+
+		if ( ! Cache::isStored( $key ) ) {
+			$result = Db::getInstance( _PS_USE_SQL_SLAVE_ )->getValue(
+				'
+					SELECT `id_tax_rules_group`
+					FROM `' . _DB_PREFIX_ . 'product_shop`
+					WHERE `id_product` = ' . (int) $id_product . ' AND id_shop=' . (int) $context->shop->id
+			);
+			Cache::store( $key, (int) $result );
+
+			return (int) $result;
+		}
+
+		return Cache::retrieve( $key );
+	}
+}

upgrade/upgrade-2.1.0.php

@@ -4,7 +4,7 @@
 }
 
 /**
- * This function updates your module from previous versions to the version 1.1,
+ * This function updates your module from previous versions to the version 2.1.0,
  * usefull when you modify your database, or register a new hook ...
  * Don't forget to create one file per version.
  */

upgrade/upgrade-2.1.2.php

@@ -0,0 +1,25 @@
+<?php
+if ( ! defined( '_PS_VERSION_' ) ) {
+	exit;
+}
+
+/**
+ * This function updates your module from previous versions to the version 2.1.2,
+ * usefull when you modify your database, or register a new hook ...
+ * Don't forget to create one file per version.
+ */
+function upgrade_module_2_1_2( $module )
+{
+	$module->uninstallOverrides();
+	$module->installOverrides();
+	Configuration::updateValue('VATCHECKER_TAXRATE_RULE', null );
+	$module->registerHook('displayAdminProductsMainStepLeftColumnMiddle');
+	$module->registerHook('actionProductUpdate');
+
+	return Db::getInstance()->Execute(
+		'CREATE TABLE IF NOT EXISTS `' . _DB_PREFIX_ . 'vatchecker_excluded_products' . '` (
+			`id_product` INTEGER UNSIGNED NOT NULL,
+			PRIMARY KEY(`id_product`)
+		) ENGINE=' . _MYSQL_ENGINE_ . ' DEFAULT CHARSET=utf8'
+	);
+}