[IMP] point_of_sale,pos_mercury: do not count invalid paymentline

With the introduction of pos_adyen, pending payments are not counted in
the total payments. We are now implementing the same behavior for
pos_mercury.

task-id: 1984690

addons/point_of_sale/static/src/js/models.js

@@ -2191,6 +2191,14 @@ exports.Paymentline = Backbone.Model.extend({
         this.trigger('change', this);
     },
 
+    /**
+     * Check if paymentline is done.
+     * Paymentline is done if there is no payment status or the payment status is done.
+     */
+    is_done: function() {
+        return this.get_payment_status() ? this.get_payment_status() === 'done' : true;
+    },
+
     /**
      * Set additional info to be printed on the receipts. value should
      * be compatible with both the QWeb and ESC/POS receipts.
@@ -2862,11 +2870,7 @@ exports.Order = Backbone.Model.extend({
     },
     get_total_paid: function() {
         return round_pr(this.paymentlines.reduce((function(sum, paymentLine) {
-            if (paymentLine.get_payment_status()) {
-                if (paymentLine.get_payment_status() == 'done') {
-                    sum += paymentLine.get_amount();
-                }
-            } else {
+            if (paymentLine.is_done()) {
                 sum += paymentLine.get_amount();
             }
             return sum;

addons/pos_mercury/static/src/js/pos_mercury.js

@@ -125,6 +125,10 @@ pos_model.Paymentline = pos_model.Paymentline.extend({
         if (this.mercury_card_number) {
             this.name = this.mercury_card_brand + " (****" + this.mercury_card_number + ")";
         }
+    },
+    is_done: function () {
+        var res = _paylineproto.is_done.apply(this);
+        return res && !this.mercury_swipe_pending;
     }
 });