[IMP] Expense, Timesheets: toast feedback to user

Display notification to give feedback to user.
And reload the view with the params "next".

closes odoo#59274

Taskid: 2344276
Related: odoo/enterprise#13846
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

addons/hr_expense/models/hr_expense.py

@@ -972,9 +972,26 @@ def approve_expense_sheets(self):
             if not self.env.user in current_managers and not self.user_has_groups('hr_expense.group_hr_expense_user') and self.employee_id.expense_manager_id != self.env.user:
                 raise UserError(_("You can only approve your department expenses"))
 
-        responsible_id = self.user_id.id or self.env.user.id
-        self.write({'state': 'approve', 'user_id': responsible_id})
+        responsible_id = self.user_id.id or self.env.user.id    
+        notification = {
+            'type': 'ir.actions.client',
+            'tag': 'display_notification',
+            'params': {
+                'title': _('There are no expense reports to approve.'),
+                'type': 'warning',
+                'sticky': False,  #True/False will display for few seconds if false
+            },
+        }
+        sheet_to_approve = self.filtered(lambda s: s.state in ['submit', 'draft'])
+        if sheet_to_approve:
+            notification['params'].update({
+                'title': _('The expense reports were successfully approved.'),
+                'type': 'success',
+                'next': {'type': 'ir.actions.act_window_close'},
+            })
+            sheet_to_approve.write({'state': 'approve', 'user_id': responsible_id})
         self.activity_update()
+        return notification
 
     def paid_expense_sheets(self):
         self.write({'state': 'done'})