feat: implement invoice listing functionality with DataTables integration

system/controllers/invoices.php

@@ -1,41 +1,27 @@
 <?php
-// Advanced usage with custom parameters
-try {
-    $userId = 8; // Customer ID
-    $status = "Unpaid";
-    $invoiceNo = "INV-2023-00987";
 
-    // Manually provide invoice data
-    $invoiceData = [
-        'plan_name' => 'Premium Plan',
-        'price' => 49.99,
-        'routers' => 'router123',
-        // Add other required fields from tbl_transactions
-    ];
+/**
+ *  PHP Mikrotik Billing (https://github.com/hotspotbilling/phpnuxbill/)
+ *  by https://t.me/ibnux
+ * 
+ **/
 
-    // Custom bills
-    $bills = [
-        'Additional Bandwidth' => 15.00,
-        'Support Fee' => 10.00,
-        'IP Address' => 5.00,
-        'Custom Service' => 25.00,
-        'Late Fee' => 5.00,
-        'Discount' => -10.00,
-    ];
 
-    $add_cost = 20;
+_auth();
+$ui->assign('_title', Lang::T('Invoices'));
+$ui->assign('_system_menu', 'Reports');
 
-    $result = Invoice::sendInvoice(
-        userId: $userId,
-        invoice: $invoiceData,
-        bills: $bills,
-        status: $status,
-        invoiceNo: $invoiceNo
-    );
+$action = $routes['1'];
+$user = User::_info();
+$ui->assign('_user', $user);
 
-    if($result) {
-        echo "Custom invoice sent! PDF generated at: system/uploads/invoices/invoice_{$invoiceNo}.pdf";
-    }
-} catch (Exception $e) {
-    echo "Invoice Error: " . $e->getMessage();
+switch ($action) {
+
+    case 'list':
+        $ui->assign('xheader', '<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.11.3/css/jquery.dataTables.min.css">');
+        $ui->assign('invoices', Invoice::getAll());
+        $ui->display('admin/invoice/list.tpl');
+        break;
+    default:
+        $ui->display('admin/404.tpl');
 }