from trytond.pool import Pool, PoolMeta
from trytond.model import ModelView, ModelSQL, fields
from trytond.pyson import Eval, Bool, If


class SaleLine(metaclass=PoolMeta):
    'SaleLine'
    __name__ = 'sale.line'

    address_equipment = fields.Many2One('party.address', "Direccion")

    @classmethod
    @ModelView.button
    def process(cls, sales):
        states = {'confirmed', 'processing', 'done'}
        sales = [s for s in sales if s.state in states]
        cls.lock(sales)
        cls._process_invoice(sales)
        cls._process_shipment(sales)
        cls._process_invoice_shipment_states(sales)
        cls._process_state(sales)

    @classmethod
    def view_attributes(cls):
        return super(SaleLine, cls).view_attributes() + [
            ('//page[@id="equipment"]', 'states', {
                    'invisible': ~Eval('lines.product.equipment'),
                    })]