[FIX] pos_order_mgmt: reprint tickets with fp

When the PoS is using fiscal positions it can lead to errors when
computing the reprinted ticket value because the tax mapping function
computes them from the current order instead of from the one belonging
to the line. So we set our loaded order temporarily as the selected one
just to bring it back to the current one after it's printed.

pos_order_mgmt/__manifest__.py

@@ -5,7 +5,7 @@
 {
     'name': 'POS Frontend Orders Management',
     'summary': 'Manage old POS Orders from the frontend',
-    'version': '11.0.1.0.0',
+    'version': '11.0.1.0.1',
     'category': 'Point of Sale',
     'author': 'GRAP, '
               'Tecnativa, '

pos_order_mgmt/static/src/js/models.js

@@ -12,7 +12,7 @@ odoo.define('pos_order_mgmt.models', function (require) {
         if (arguments.length && arguments[0] && arguments[0].uid) {
             var order = this.db.get_order(arguments[0].uid);
             if (order && order.data) {
-                var data = Object.assign({}, order.data);
+                var data = _.extend({}, order.data);
                 var partner = this.db.get_partner_by_id(data.partner_id);
                 if (partner && partner.id && partner.name) {
                     data.partner_id = [partner.id, partner.name];

pos_order_mgmt/static/src/js/widgets.js

@@ -37,6 +37,13 @@ odoo.define('pos_order_mgmt.widgets', function (require) {
                 return this._super();
             }
             this.pos.from_loaded_order = false;
+            // When reprinting a loaded order we temporarily set it as the
+            // active one. When we get out from the printing screen, we set
+            // it back to the one that was active
+            if (this.pos.current_order) {
+                this.pos.set_order(this.pos.current_order);
+                this.pos.current_order = false;
+            }
             return this.gui.show_screen(this.gui.startup_screen);
         },
     });
@@ -145,6 +152,10 @@ odoo.define('pos_order_mgmt.widgets', function (require) {
 
         action_print: function (order) {
             var receipt = order.export_for_printing();
+            // We store temporarily the current order so we can safely compute
+            // taxes based on fiscal position
+            this.pos.current_order = this.pos.get_order()
+            this.pos.set_order(order);
             if (this.pos.config.iface_print_via_proxy) {
                 this.pos.proxy.print_receipt(QWeb.render(
                     'XmlReceipt', {
@@ -155,6 +166,8 @@ odoo.define('pos_order_mgmt.widgets', function (require) {
                         orderlines: order.get_orderlines(),
                         paymentlines: order.get_paymentlines(),
                     }));
+                this.pos.set_order(this.pos.current_order);
+                this.pos.current_order = false;
             } else {
                 this.pos.reloaded_order = order;
                 this.gui.show_screen('receipt');
@@ -182,6 +195,14 @@ odoo.define('pos_order_mgmt.widgets', function (require) {
                 order_data.partner_id = order_data.partner_id[0];
             }
             order.set_client(this.pos.db.get_partner_by_id(order_data.partner_id));
+            // Set fiscal position
+            if (order_data.fiscal_position && this.pos.fiscal_positions) {
+                var fiscal_positions = this.pos.fiscal_positions;
+                order.fiscal_position = fiscal_positions.filter(function (p) {
+                    return p.id === order_data.fiscal_position;
+                })[0];
+                order.trigger('change');
+            }
             // Set order lines
             var orderLines = order_data.line_ids || order_data.lines || [];
             _.each(orderLines, function (orderLine) {
@@ -204,17 +225,6 @@ odoo.define('pos_order_mgmt.widgets', function (require) {
                     });
                 }
             });
-            // Set fiscal position
-            if (order_data.fiscal_position && this.pos.fiscal_positions) {
-                var fiscal_positions = this.pos.fiscal_positions;
-                order.fiscal_position = fiscal_positions.filter(function (p) {
-                    return p.id === order_data.fiscal_position;
-                })[0];
-                _.each(order.orderlines.models, function (line) {
-                    line.set_quantity(line.quantity);
-                });
-                order.trigger('change');
-            }
             if (order_data.return) {
                 order.return = true;
                 // A credit note should be emited if there was an invoice