Add method to refresh a shuttle screen

Example of usage in an odoo shell, when a screen is open:

>>> self.env['vertical.lift.shuttle'].browse(1)._operation_for_mode().operation_descr = 'foo'
>>> self.env['vertical.lift.shuttle'].browse(1)._send_notification_refresh()
>>> env.cr.commit()

Provided the longpolling is correctly configured with a proxy, the
screen should immediately refresh with 'foo' as operation description.

stock_vertical_lift/models/vertical_lift_operation_base.py

@@ -97,6 +97,28 @@ class VerticalLiftOperationBase(models.AbstractModel):
         )
         return sum(quants.mapped("quantity"))
 
+    def _send_notification_refresh(self):
+        """Send a refresh notification
+
+        Generally, you want to call the method
+        _send_notification_refresh() on VerticalLiftShuttle so you
+        don't need to know the id of the current operation.
+
+        Other notifications can be implemented, they have to be
+        added in static/src/js/vertical_lift.js and the message
+        must contain an "action" and "params".
+        """
+        self.ensure_one()
+        channel = "notify_vertical_lift_screen"
+        bus_message = {
+            "action": "refresh",
+            "params": {
+                "model": self._name,
+                "id": self.id,
+            }
+        }
+        self.env["bus.bus"].sendone(channel, bus_message)
+
 
 class VerticalLiftOperationTransfer(models.AbstractModel):
     """Base model for shuttle pick and put operations"""

stock_vertical_lift/models/vertical_lift_shuttle.py

@@ -214,6 +214,20 @@ class VerticalLiftShuttle(models.Model):
         self.mode = "inventory"
         return self.action_open_screen()
 
+    def _send_notification_refresh(self):
+        """Send a refresh notification to the current opened screen
+
+        The form controller on the front-end side will instantaneously
+        refresh the form with the latest committed data.
+
+        It can be used for instance after a vertical lift hardware
+        event occurred to inform the user on their screen.
+
+        The method is private only to prevent xml/rpc calls to
+        interact with the screen.
+        """
+        self._operation_for_mode._send_notification_refresh()
+
 
 class VerticalLiftShuttleManualBarcode(models.TransientModel):
     _name = "vertical.lift.shuttle.manual.barcode"

stock_vertical_lift/static/src/js/vertical_lift.js

@@ -5,6 +5,7 @@ var core = require('web.core');
 var KanbanRecord = require('web.KanbanRecord');
 var basicFields = require('web.basic_fields');
 var field_registry = require('web.field_registry');
+var FormController = require('web.FormController');
 var FieldInteger = basicFields.FieldInteger;
 
 KanbanRecord.include({
@@ -44,6 +45,53 @@ var ExitButton = FieldInteger.extend({
             clear_breadcrumbs: true,
         });
     },
+
+});
+
+
+FormController.include({
+    init: function (parent, model, renderer, params) {
+        this._super.apply(this, arguments);
+        if(this.modelName.startsWith('vertical.lift.operation.')) {
+            this.call('bus_service', 'addChannel', 'notify_vertical_lift_screen');
+            this.call(
+                'bus_service', 'on', 'notification',
+                this, this.vlift_bus_notification
+            );
+            this.call('bus_service', 'startPolling');
+        }
+    },
+    vlift_bus_notification: function (notifications) {
+        var self = this;
+        _.each(notifications, function (notification) {
+            var channel = notification[0];
+            var message = notification[1];
+            if(channel === 'notify_vertical_lift_screen') {
+                switch(message['action']) {
+                case 'refresh':
+                    self.vlift_bus_action_refresh(message['params']);
+                    break;
+                }
+            }
+        });
+    },
+    vlift_bus_action_refresh: function(params) {
+        var selectedIds = this.getSelectedIds();
+        if(!selectedIds.length){
+            return;
+        }
+        var currentId = selectedIds[0];
+        if(params['id'] === currentId && params['model'] == this.modelName){
+            this.reload();
+        }
+    },
+    destroy: function () {
+        if(this.modelName.startsWith('vertical.lift.operation.')) {
+            this.call('bus_service', 'deleteChannel', 'notify_vertical_lift_screen');
+        }
+        this._super.apply(this, arguments);
+    }
+
 });
 
 field_registry.add('vlift_shuttle_exit_button', ExitButton);