Source code for invenio_deposit.permissions

# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2016 CERN.
#
# Invenio is free software; you can redistribute it
# and/or modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# Invenio is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Invenio; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307, USA.
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# In applying this license, CERN does not
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"""Permissions for deposit."""

import pkg_resources
from flask_principal import ActionNeed

action_admin_access = ActionNeed('deposit-admin-access')


def admin_permission_factory():
    """Factory for creating a permission for an admin `deposit-admin-access`.

    If `invenio-access` module is installed, it returns a
    :class:`invenio_access.permissions.DynamicPermission` object.
    Otherwise, it returns a :class:`flask_principal.Permission` object.

    :returns: Permission instance.
    """
    try:
        pkg_resources.get_distribution('invenio-access')
        from invenio_access.permissions import DynamicPermission as Permission
    except pkg_resources.DistributionNotFound:
        from flask_principal import Permission

    return Permission(action_admin_access)