display error message if selecting meal voucher payment method and no amount eligible

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

@@ -249,6 +249,15 @@ odoo.define("pos_meal_voucher.screens", function (require) {
         },
 
         click_paymentmethods_meal_voucher_mixed: function(id) {
+            var order = this.pos.get_order();
+            if (order.get_total_meal_voucher_eligible() == 0) {
+                this.gui.show_popup("alert", {
+                    'title': _t("Meal Voucher 0 amount"),
+                    'body':  _t("can't pay"),
+                });
+                return false;
+            }
+
             var cashregister = null;
             for ( var i = 0; i < this.pos.cashregisters.length; i++ ) {
                 if ( this.pos.cashregisters[i].journal_id[0] === id ){
@@ -262,7 +271,6 @@ odoo.define("pos_meal_voucher.screens", function (require) {
             this.reset_input();
             this.render_paymentlines();
         },
-
         render_paymentmethods: function() {
             var self = this;
             var methods = this._super.apply(this, arguments);
@@ -279,8 +287,24 @@ odoo.define("pos_meal_voucher.screens", function (require) {
             var paymentScreen = this.pos.gui.current_screen;
             var order = this.pos.get_order();
 
-            
+            if (
+                order.selected_paymentline.is_meal_voucher()
+                && order.get_total_meal_voucher_eligible() == 0
+            ) {
+                this.gui.show_popup("alert", {
+                    'title': _t("Impossible de payer en titre restaurant"),
+                    'body':  _t("Aucun article du panier n'est éligible en titres restaurants (Montant éligible : 0€)."),
+                    cancel: function() {
+                        this.pos.get_order().remove_paymentline(order.selected_paymentline);
+                        var paymentScreen = this.pos.gui.current_screen;
+                        paymentScreen.reset_input();
+                        paymentScreen.render_paymentlines();
+                    }
+                });
 
+                return false;
+            }
+            
             if(order.selected_paymentline.is_meal_voucher() && order.selected_paymentline.is_dematerialized_meal_voucher()){
                 var total_eligible = order.get_total_meal_voucher_eligible();
                 var total_received = order.get_total_meal_voucher_received();
@@ -325,14 +349,8 @@ odoo.define("pos_meal_voucher.screens", function (require) {
 
                     },
                 });
-
-                
             }
         },
-
-        
-        
-
         render_paymentlines: function() {
             var self  = this;