from odoo import models


class ResPartner(models.Model):
    _inherit = "res.partner"

    def _filter_shown_in_cc(self, show_internal_users):
        """Get partners that should be displayed as CC on mails."""
        # Never display hidden users
        result = self.filtered_domain(
            [
                "|",
                ("user_ids", "=", False),
                ("user_ids.show_in_cc", "=", True),
            ]
        )
        # Remove internal users from result if needed
        if not show_internal_users:
            internal_users = result.filtered_domain(
                [
                    ("user_ids.active", "=", True),
                    ("user_ids.groups_id", "in", self.env.ref("base.group_user").ids),
                ]
            )
            result -= internal_users
        return result