feat(01-purchase-data-layer): add post-payment purchase data layer

Phase 1 complete:

- move purchase event to order confirmation after successful payment

- add backend purchase payload builder for transaction and ticket lines

- remove premature purchase push from przelewy24 redirect view

autoload/controls/class.Tickets.php

@@ -4,6 +4,54 @@ namespace controls;
 
 class Tickets
 {
+  private static function buildPurchaseDataLayer(array $order)
+  {
+    $items = [];
+    $tickets = $order['tickets'] ?? [];
+
+    foreach ($tickets as $ticket) {
+      $itemPrice = (float) str_replace(',', '.', (string) ($ticket['price'] ?? 0));
+      $itemQuantity = (int) ($ticket['quantity'] ?? 0);
+      $productId = (int) ($ticket['product_id'] ?? 0);
+      $itemId = $productId > 0 ? (string) $productId : (string) ($ticket['id'] ?? '');
+
+      $items[] = [
+        'item_id' => $itemId,
+        'item_name' => trim((string) ($ticket['name'] ?? '')),
+        'product_id' => $productId,
+        'quantity' => $itemQuantity,
+        'price' => $itemPrice,
+        'date_visit' => trim((string) ($ticket['date_visit'] ?? '')),
+      ];
+    }
+
+    $orderValue = (float) str_replace(',', '.', (string) ($order['order_price'] ?? 0));
+
+    return [
+      'event' => 'purchase',
+      'ecommerce' => [
+        'transaction_id' => (string) ($order['id'] ?? ''),
+        'value' => $orderValue,
+        'currency' => 'PLN',
+        'shipping' => 0.0,
+        'tax' => 0.0,
+        'payment_type' => 'przelewy24',
+        'items' => $items,
+      ],
+      'order' => [
+        'id' => (int) ($order['id'] ?? 0),
+        'hash' => trim((string) ($order['hash'] ?? '')),
+        'payment_date' => trim((string) ($order['payment_date'] ?? '')),
+        'date_added' => trim((string) ($order['date_added'] ?? '')),
+        'payment_status' => (int) ($order['payment_status'] ?? 0),
+        'vat' => (int) ($order['vat'] ?? 0),
+        'city' => trim((string) ($order['city'] ?? '')),
+        'zip_code' => trim((string) ($order['zip_code'] ?? '')),
+        'country' => 'PL',
+      ],
+    ];
+  }
+
   private static function sendPaidOrderSummaryEmail(array $order)
   {
     $hash = trim((string) ($order['hash'] ?? ''));
@@ -799,12 +847,14 @@ class Tickets
     $order = \factory\Tickets::get_order_details_by_hash(\S::get('order'));
     $order_successful = false;
     $order_fail = false;
+    $purchaseDataLayer = null;
 
     if ( $order && !empty($order['payment_status']) && empty($order['informed_user']) )
     {
       if ($order['payment_status'])
       {
         $order_successful = true;
+        $purchaseDataLayer = self::buildPurchaseDataLayer($order);
         $mailSent = self::sendPaidOrderSummaryEmail($order);
         if ($mailSent) {
           $mdb->update('orders', ['informed_user' => 1], ['id' => $order['id']]);
@@ -820,7 +870,8 @@ class Tickets
     return \Tpl::view( 'tickets/order-confirm', [
       'order' => $order,
       'order_successful' => $order_successful,
-      'order_fail' => $order_fail
+      'order_fail' => $order_fail,
+      'purchase_data_layer' => $purchaseDataLayer
     ]);
   }