def check(self, skip_permission_checks=False):
from wagtail.core.models import UserPagePermissionsProxy
# Essential data model checks
if self.page._state.adding:
raise CopyPageIntegrityError(
'Page.copy() called on an unsaved page')
if self.to and self.recursive and (self.to.id == self.page.id
or self.to.is_descendant_of(
self.page)):
raise CopyPageIntegrityError(
"You cannot copy a tree branch recursively into itself")
# Permission checks
if self.user and not skip_permission_checks:
to = self.to
if to is None:
to = self.page.get_parent()
if not self.page.permissions_for_user(self.user).can_copy_to(
to, self.recursive):
raise CopyPagePermissionError(
"You do not have permission to copy this page")
if self.keep_live:
destination_perms = UserPagePermissionsProxy(
self.user).for_page(self.to)
if not destination_perms.can_publish_subpage():
raise CopyPagePermissionError(
"You do not have permission to publish a page at the destination"
)
