Add fee product ID configuration to the Economic module

services/nginx/app/modules/economic/config/economic_fee_product_id_c.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace config;
+
+use traits\module_config_variable;
+
+class economic_fee_product_id_c
+{
+    use module_config_variable;
+
+    /**
+     * @throws \Exception
+     */
+    public function __construct()
+    {
+        self::setupConfigVariable(
+            'economic',
+            'feeProductId',
+            'string',
+            true,
+            null,
+            'Fee product ID',
+            '',
+            false,
+            1
+        );
+    }
+}

services/nginx/app/modules/economic/economic_c.php

@@ -3,11 +3,13 @@ require_once WD . '/modules/economic/config/economic_invoice_layout_c.php';
 require_once WD . '/modules/economic/config/economic_payment_terms_c.php';
 require_once WD . '/modules/economic/config/economic_admin_fee_monthly_c.php';
 require_once WD . '/modules/economic/config/economic_admin_fee_order_c.php';
+require_once WD . '/modules/economic/config/economic_fee_product_id_c.php';
 
 use config\economic_invoice_layout_c;
 use config\economic_payment_terms_c;
 use config\economic_admin_fee_monthly_c;
 use config\economic_admin_fee_order_c;
+use config\economic_fee_product_id_c;
 use traits\module_config_t;
 
 class economic_c
@@ -18,6 +20,7 @@ class economic_c
     public economic_payment_terms_c $payment_terms;
     public economic_admin_fee_monthly_c $admin_fee_monthly;
     public economic_admin_fee_order_c $admin_fee_order;
+    public economic_fee_product_id_c $fee_product_id;
 
     public function __construct()
     {
@@ -26,11 +29,13 @@ class economic_c
             economic_invoice_layout_c::class,
             economic_payment_terms_c::class,
             economic_admin_fee_monthly_c::class,
-            economic_admin_fee_order_c::class
+            economic_admin_fee_order_c::class,
+            economic_fee_product_id_c::class
         ]);
         $this->invoice_layout = new economic_invoice_layout_c();
         $this->payment_terms = new economic_payment_terms_c();
         $this->admin_fee_monthly = new economic_admin_fee_monthly_c();
         $this->admin_fee_order = new economic_admin_fee_order_c();
+        $this->fee_product_id = new economic_fee_product_id_c();
     }
 }