cooperative-market/beesdoo_shift/wizard/extension.py

from odoo import models, fields, api, _
from odoo.exceptions import UserError

class Subscribe(models.TransientModel):
    _name = 'beesdoo.shift.extension'
    _inherit = 'beesdoo.shift.action_mixin'

    def _get_default_extension_delay(self):
        return int(self.env['ir.config_parameter'].get_param('default_extension_delay', 28))


    extension_start_date = fields.Date(string="Start date for the extension", default=fields.Date.today, readonly=True)
    auto = fields.Boolean("Auto Extension", default=False)
    extension_days = fields.Integer(default=_get_default_extension_delay)

    @api.multi
    def auto_ext(self):
        self = self._check(group='beesdoo_shift.group_shift_attendance')
        status_id = self.env['cooperative.status'].search([('cooperator_id', '=', self.cooperator_id.id)])
        status_id.sudo().write({'extension_start_time': self.extension_start_date})

    @api.multi
    def extension(self):
        self = self._check() #maybe a different group
        grace_delay = int(self.env['ir.config_parameter'].get_param('default_grace_delay', 10))
        status_id = self.env['cooperative.status'].search([('cooperator_id', '=', self.cooperator_id.id)])
        if not status_id.extension_start_time:
            raise UserError(_('You should not make a manual extension when the grace delay has not been triggered yet'))
        today_delay = (status_id.today - status_id.extension_start_time).days - grace_delay
        if today_delay < 0:
            raise UserError(_('You should not start a manual extension during the grace delay'))
        status_id.sudo().write({'time_extension': self.extension_days + today_delay})