refactor: feat: clear order via order proccess

ajax/frontend/order/clear.php

+<?php
+
+/**
+ * This file contains package_quiqqer_order_ajax_frontend_order_getArticles
+ */
+
+/**
+ * Return the articles of an order
+ *
+ * @param integer $orderHash
+ * @return array
+ */
+QUI::$Ajax->registerFunction(
+    'package_quiqqer_order_ajax_frontend_order_clear',
+    function ($orderHash) {
+        $OrderProcess = new QUI\ERP\Order\OrderProcess([
+            'orderHash' => $orderHash
+        ]);
+
+        $Order = $OrderProcess->getOrder();
+        $Order->clear();
+    },
+    ['orderHash']
+);

bin/frontend/classes/Orders.js

@@ -154,6 +154,29 @@ define('package/quiqqer/order/bin/frontend/classes/Orders', [
             });
         },
 
+        /**
+         * Clears the complete order
+         *
+         * @param orderHash
+         * @return {Promise}
+         */
+        clearOrder: function (orderHash) {
+            var self = this;
+
+            return new Promise(function (resolve, reject) {
+                QUIAjax.post('package_quiqqer_order_ajax_frontend_order_clear', function () {
+                    self.fireEvent('orderClear', [self, orderHash]);
+                    resolve();
+                }, {
+                    'package': 'quiqqer/order',
+                    orderHash: orderHash,
+                    onError  : reject,
+                    showError: false
+                });
+            });
+
+        },
+
         /**
          * Validate a VAT ID
          *

bin/frontend/controls/OrderProcess.js

@@ -274,6 +274,15 @@ define('package/quiqqer/order/bin/frontend/controls/OrderProcess', [
             });
         },
 
+        /**
+         * Clears the current order
+         *
+         * @return {Promise}
+         */
+        clear: function () {
+            return Orders.clearOrder(this.getAttribute('orderHash'));
+        },
+
         //endregion
 
         // region API