Init project

Future fixes:
-Remove logic for showing current order reference in ajax.js. Instead grab from database using cart ID

controllers/front/ajax.php

@@ -0,0 +1,63 @@
+<?php
+
+use Module\WsOrderreference\Entity\OrderReference;
+use Module\WsOrderreference\Repository\OrderReferenceRepository;
+
+if (file_exists(__DIR__ . '../../vendor/autoload.php')) {
+    require_once __DIR__ . '../../vendor/autoload.php';
+}
+
+class ws_orderreferenceAjaxModuleFrontController extends ModuleFrontController
+{
+    public function initContent()
+    {
+        $orderReference = Tools::getValue('order_reference_input');
+        $idCart = $this->context->cart->id;
+        
+        if (!$idCart) {
+            $this->ajaxRender(json_encode([
+                'success' => false,
+                'message' => $this->module->l('No cart found.', 'ajax')
+            ]));
+            return;
+        }
+        
+        if (!preg_match('/^[a-zA-Z0-9_\- ]+$/', $orderReference)) {
+            $this->ajaxRender(json_encode([
+                'success' => false, 
+                'message' => $this->module->l('Please enter a valid order reference. Characters allowed: a-z, 0-9, -, _ and space', 'ajax')
+            ]));
+            return;
+        }
+        
+        try {
+            /** @var \Doctrine\ORM\EntityManagerInterface $entityManager */
+            $entityManager = $this->get('doctrine.orm.default_entity_manager');
+            
+            /** @var OrderReferenceRepository $repository */
+            $repository = $entityManager->getRepository(OrderReference::class);
+        
+            $orderRef = $repository->findByCartId($idCart);
+            
+            if (!$orderRef) {
+                $orderRef = new OrderReference();
+                $orderRef->setIdCart($idCart);
+            }
+            
+            $orderRef->setOrderReference($orderReference);
+
+            $entityManager->persist($orderRef);
+            $entityManager->flush();
+            
+            $this->ajaxRender(json_encode([
+                'success' => true,
+                'message' => $this->module->l('Order reference received!', 'ajax')
+            ]));
+        } catch (Exception $e) {
+            $this->ajaxRender(json_encode([
+                'success' => false,
+                'message' => $this->module->l('Could not save order reference.', 'ajax') 
+            ]));
+        }
+    }
+}