a quick solution to compute meal voucher amount before sending it to tpe if…

a quick solution to compute meal voucher amount before sending it to tpe if pos_payment_terminal can be made dependant on pos_meal_voucher

extra_addons/pos_payment_terminal/__openerp__.py

@@ -28,7 +28,9 @@
     'summary': 'Manage Payment Terminal device from POS front end',
     'author': "Aurélien DUMAINE,Akretion,Odoo Community Association (OCA)",
     'license': 'AGPL-3',
-    'depends': ['point_of_sale'],
+# We want to make sure that payment_terminal proper code will be called after the amount update by making payment_terminal dependant from meal_voucher
+# A cleaner solution may be to create a new module that will depend on pos_payement_terminal and pos_meal_voucher
+    'depends': ['point_of_sale','pos_meal_voucher'],
     'data': [
         'pos_payment_terminal_view.xml',
         'security/security.xml',

extra_addons/pos_payment_terminal/static/src/js/pos_payment_terminal.js

@@ -48,7 +48,7 @@ odoo.define('pos_payment_terminal.pos_payment_terminal', function (require) {
         },
         get_data_send: function(order, line, currency_iso) {
             var data = {
-                    'amount' : order.get_due(line),
+                    'amount' : round_pr(Math.max(0,line.get_amount()), this.pos.currency.rounding),
                     'currency_iso' : currency_iso,
                     'payment_mode' : line.cashregister.journal.payment_mode,
                     'wait_terminal_answer' : this.wait_terminal_answer(),

lacagette_addons/pos_meal_voucher/static/src/js/screens.js

@@ -314,8 +314,7 @@ odoo.define("pos_meal_voucher.screens", function (require) {
             
             // if user choose card meal voucher
             if(order.selected_paymentline.is_meal_voucher() && order.selected_paymentline.is_dematerialized_meal_voucher()){
-                // update selected (last) payment line & order with meal voucher data
-                function update_order_meal_voucher_data(issuer = '') {
+                function compute_order_meal_voucher_amount() {
                     var total_eligible = order.get_total_meal_voucher_eligible();
                     var total_received = order.get_total_meal_voucher_received();
                     var max_amount = self.pos.config.max_meal_voucher_amount;
@@ -326,14 +325,23 @@ odoo.define("pos_meal_voucher.screens", function (require) {
 
                     // Check how much is still possible to pay with meal voucher
                     // The selected line is "by default" set to the rest to pay of the order
-                    const max_curent_amount = current_max-total_received +order.selected_paymentline.get_amount();
-            
-                    order.selected_paymentline.set_amount(max_curent_amount);
-                    order.selected_paymentline.set_meal_voucher_issuer(issuer);
+                    return current_max-total_received +order.selected_paymentline.get_amount();
+                }
+
+                // We can't wait confirm function in this.gui.show_popup to be asynchronously called
+                // to update paymentline with proper amount because this amount will be sent in the interval
+                // to payment terminal.
+                // We ensure payment_terminal proper code is called after the amount update by making
+                // payment_terminal dependant from meal_voucher
+                const max_curent_amount = compute_order_meal_voucher_amount();
+                order.selected_paymentline.set_amount(max_curent_amount);
 
+                // update selected (last) payment line & order with meal voucher data
+                function update_order_meal_voucher_data(amount,issuer = '') {
+                    order.selected_paymentline.set_meal_voucher_issuer(issuer);
                     paymentScreen.order_changes();
                     paymentScreen.render_paymentlines();
-                    paymentScreen.$(".paymentline.selected .edit").text(paymentScreen.format_currency_no_symbol(max_curent_amount));
+                    paymentScreen.$(".paymentline.selected .edit").text(paymentScreen.format_currency_no_symbol(amount));
                 }
 
                 // If required by the config, ask for the meal voucher issuer
@@ -357,14 +365,14 @@ odoo.define("pos_meal_voucher.screens", function (require) {
                         'selectData': select_data,
                         confirm: function(value) {
                             let issuer = value;
-                            update_order_meal_voucher_data(issuer)
+                            update_order_meal_voucher_data(max_curent_amount,issuer)
                         },
                         cancel: function(value) {
                             self.remove_selected_paymentline(order);
                         },
                     });
                 } else {
-                    update_order_meal_voucher_data();
+                    update_order_meal_voucher_data(max_curent_amount);
                 }
             }