Add CSS hook, URL ref prefill, order prefill, and Widerrufsfrist display

- Fix CSS loading: register stylesheet via actionFrontControllerSetMedia
  hook instead of initContent() — guaranteed to fire before page render
- Upgrade script registers new hook on existing installations
- Feature 1: pre-fill order_reference from ?ref= URL parameter
- Feature 2: pre-fill customer name/email from logged-in account when
  navigating with ?ref= (already worked; now order ref is also pre-filled)
- Feature 4: compute Widerrufsfrist (order date +14 days) from DB and
  display on form (when ref in URL), confirm, and success pages
- Feature 3: EN mail templates were already present

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

controllers/front/withdraw.php

@@ -26,12 +26,6 @@ class Simple_withdrawalbuttonWithdrawModuleFrontController extends ModuleFrontCo
     {
         parent::initContent();
 
-        $this->registerStylesheet(
-            'cyp-withdrawal',
-            'modules/' . $this->module->name . '/views/css/withdrawal.css',
-            ['media' => 'all', 'priority' => 200]
-        );
-
         $this->context->smarty->assign([
             'errors_list' => $this->errorsList,
             'form_data' => $this->formData,
@@ -40,6 +34,7 @@ class Simple_withdrawalbuttonWithdrawModuleFrontController extends ModuleFrontCo
             'success_data' => $this->successData,
             'privacy_url' => (string) Configuration::get(Simple_withdrawalbutton::CONF_PRIVACY_URL),
             'revocation_url' => (string) Configuration::get(Simple_withdrawalbutton::CONF_REVOCATION_URL),
+            'withdrawal_deadline' => $this->computeDeadline(),
         ]);
 
         if ($this->currentView === 'confirm') {
@@ -185,16 +180,37 @@ class Simple_withdrawalbuttonWithdrawModuleFrontController extends ModuleFrontCo
             $customerEmail = (string) $this->context->customer->email;
         }
 
+        $orderRef = $this->module->cleanText(Tools::getValue('ref'), 64);
+
         return [
             'customer_name' => $customerName,
             'customer_email' => $customerEmail,
-            'order_reference' => '',
+            'order_reference' => $orderRef,
             'withdrawal_scope' => 'full',
             'withdrawal_items_text' => '',
             'message' => '',
         ];
     }
 
+    private function computeDeadline()
+    {
+        $ref = isset($this->formData['order_reference']) ? $this->formData['order_reference'] : '';
+        if ($ref === '') {
+            $ref = $this->module->cleanText(Tools::getValue('ref'), 64);
+        }
+        if ($ref === '') {
+            return '';
+        }
+
+        $orderInfo = $this->module->lookupOrderInfoByReference($ref);
+        if (!$orderInfo) {
+            return '';
+        }
+
+        $isoCode = Language::getIsoById((int) $this->context->language->id) ?: 'de';
+        return (string) $this->module->computeWithdrawalDeadline($orderInfo['date_add'], $isoCode);
+    }
+
     private function validateData(array $data)
     {
         $errors = [];

simple_withdrawalbutton.php

@@ -50,6 +50,7 @@ class Simple_withdrawalbutton extends Module
             && $this->installTab()
             && $this->registerHook('displayFooter')
             && $this->registerHook('displayCustomerAccount')
+            && $this->registerHook('actionFrontControllerSetMedia')
             && Configuration::updateValue(self::CONF_SHOP_EMAIL, (string) Configuration::get('PS_SHOP_EMAIL'))
             && Configuration::updateValue(self::CONF_RATE_LIMIT, '5')
             && Configuration::updateValue(self::CONF_PRIVACY_URL, '')
@@ -295,6 +296,20 @@ class Simple_withdrawalbutton extends Module
         return $this->display(__FILE__, 'views/templates/hook/customer_account.tpl');
     }
 
+    public function hookActionFrontControllerSetMedia()
+    {
+        if (
+            Tools::getValue('module') === $this->name
+            && Tools::getValue('controller') === 'withdraw'
+        ) {
+            $this->context->controller->registerStylesheet(
+                'cyp-withdrawal',
+                'modules/' . $this->name . '/views/css/withdrawal.css',
+                ['media' => 'all', 'priority' => 200]
+            );
+        }
+    }
+
     public function getWithdrawalLink()
     {
         return $this->context->link->getModuleLink($this->name, 'withdraw', [], true);
@@ -342,6 +357,43 @@ class Simple_withdrawalbutton extends Module
         return $idOrder > 0 ? $idOrder : null;
     }
 
+    public function lookupOrderInfoByReference($orderReference)
+    {
+        $orderReference = $this->cleanText($orderReference, 64);
+        if ($orderReference === '') {
+            return null;
+        }
+
+        $sql = 'SELECT `id_order`, `date_add`, `id_customer`
+            FROM `' . _DB_PREFIX_ . 'orders`
+            WHERE `reference` = "' . pSQL($orderReference) . '"
+            AND `id_shop` = ' . (int) $this->context->shop->id . '
+            ORDER BY `id_order` DESC';
+
+        $row = Db::getInstance()->getRow($sql);
+        if (!$row) {
+            return null;
+        }
+
+        return [
+            'id_order' => (int) $row['id_order'],
+            'date_add' => $row['date_add'],
+            'id_customer' => (int) $row['id_customer'],
+        ];
+    }
+
+    public function computeWithdrawalDeadline($orderDateAdd, $isoCode = 'de')
+    {
+        $timestamp = strtotime((string) $orderDateAdd);
+        if (!$timestamp) {
+            return null;
+        }
+
+        $deadline = strtotime('+14 days', $timestamp);
+
+        return ($isoCode === 'de') ? date('d.m.Y', $deadline) : date('d/m/Y', $deadline);
+    }
+
     public function hashForPrivacy($value)
     {
         $value = trim((string) $value);

upgrade/index.php

@@ -0,0 +1,8 @@
+<?php
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+header('Location: ../');
+exit;

upgrade/upgrade-0.1.5.php

@@ -0,0 +1,10 @@
+<?php
+
+if (!defined('_PS_VERSION_')) {
+    exit;
+}
+
+function upgrade_module_0_1_5($object)
+{
+    return $object->registerHook('actionFrontControllerSetMedia');
+}

views/templates/front/confirm.tpl

@@ -70,6 +70,17 @@
           <div class="cyp-summary-val">{$form_data.message|escape:'html':'UTF-8'|nl2br nofilter}</div>
         </div>
       {/if}
+      {if isset($withdrawal_deadline) && $withdrawal_deadline != ''}
+        <div class="cyp-summary-row">
+          <div class="cyp-summary-key">{l s='Frist' mod='simple_withdrawalbutton'}</div>
+          <div class="cyp-summary-val" style="color:var(--cyw-accent);font-weight:600;">
+            {l s='bis' mod='simple_withdrawalbutton'} {$withdrawal_deadline|escape:'html':'UTF-8'}
+            <span style="font-size:12px;font-weight:400;color:var(--cyw-text-muted);">
+              ({l s='14 Tage ab Bestelldatum' mod='simple_withdrawalbutton'})
+            </span>
+          </div>
+        </div>
+      {/if}
     </div>
 
     <form method="post" action="{$action_url|escape:'html':'UTF-8'}">

views/templates/front/form.tpl

@@ -28,6 +28,19 @@
       {/if}
     </div>
 
+    {if isset($withdrawal_deadline) && $withdrawal_deadline != ''}
+      <div class="cyp-deadline-notice" style="
+        display:flex; align-items:center; gap:10px; background:#eef2f8;
+        border:1px solid #c5d4eb; border-radius:6px; padding:11px 14px;
+        font-size:13px; color:var(--cyw-accent); margin-bottom:24px;">
+        <span style="font-size:16px;">📅</span>
+        <span>
+          {l s='Widerrufsfrist (14 Tage ab Bestelldatum): bis' mod='simple_withdrawalbutton'}
+          <strong>{$withdrawal_deadline|escape:'html':'UTF-8'}</strong>
+        </span>
+      </div>
+    {/if}
+
     {if $errors_list|@count > 0}
       <div class="alert alert-danger" role="alert">
         <ul>

views/templates/front/success.tpl

@@ -77,6 +77,17 @@
           <div class="cyp-summary-val">{$success_data.message|escape:'html':'UTF-8'|nl2br nofilter}</div>
         </div>
       {/if}
+      {if isset($withdrawal_deadline) && $withdrawal_deadline != ''}
+        <div class="cyp-summary-row">
+          <div class="cyp-summary-key">{l s='Frist' mod='simple_withdrawalbutton'}</div>
+          <div class="cyp-summary-val" style="color:var(--cyw-accent);font-weight:600;">
+            {l s='bis' mod='simple_withdrawalbutton'} {$withdrawal_deadline|escape:'html':'UTF-8'}
+            <span style="font-size:12px;font-weight:400;color:var(--cyw-text-muted);">
+              ({l s='14 Tage ab Bestelldatum' mod='simple_withdrawalbutton'})
+            </span>
+          </div>
+        </div>
+      {/if}
     </div>
 
     <div class="cyp-legal">