from odoo import api, fields, models

class CustomPosOrder(models.Model):
    _inherit = 'pos.order'
    
    def _process_saved_order(self, draft):
        # Call the original logic
        res = super()._process_saved_order(draft)
        for order in self:
            pos_config = self.env['pos.config']
            displays = self.env['pos_preparation_display.display'].search([])

            # refresh the display using bus.bus service (in js bus_service)
            # with channel 'preparation_display-{display.access_token}'
            # and message 'load_orders' with data {'preparation_display_id': display.id, 'sound': True}
            for display in displays:
                self.env['bus.bus']._sendone(f'preparation_display-{display.access_token}', 'load_orders', {
                    'preparation_display_id': display.id,
                    'sound': True
                })
        return res