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Viewing File: /opt/cloudlinux/venv/lib/python3.11/site-packages/lvestats/lib/uidconverter.py

# coding=utf-8
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2019 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT

import pwd
from typing import Dict, Optional  # NOQA

from sqlalchemy.engine import Engine  # NOQA
from sqlalchemy.orm import sessionmaker
from sqlalchemy.orm.exc import NoResultFound

from clcommon import cpapi
from clcommon.clproc import LIMIT_LVP_ID
from lveapi import NameMap
from lvestats.lib.commons.func import deserialize_lve_id, serialize_lve_id
from lvestats.orm import user

__author__ = 'shaman'


__all__ = ('uid_to_username', 'username_to_uid')

_name_map_cache = None  # type: NameMap
_id_reseller_map_cache = None  # type: Dict[int, str]


def _get_name_map():
    # type: () -> NameMap
    global _name_map_cache
    if _name_map_cache is None:
        name_map = NameMap()
        name_map.link_xml_node()
        _name_map_cache = name_map
    return _name_map_cache


def uid_to_username_local(uid):
    # type: (int) -> Optional[str]
    try:
        return pwd.getpwuid(uid).pw_name
    except KeyError:
        return None


def _uid_to_reseller_local(uid):
    # type: (int) -> Optional[str]
    reseller = _get_name_map().get_name(uid)
    if reseller is None:
        try:
            reseller = pwd.getpwuid(uid).pw_name
        except KeyError:
            reseller = _get_reseller_name_from_panel(uid)
    return reseller


def _get_reseller_name_from_panel(uid):
    # type: (int) -> Optional[str]
    global _id_reseller_map_cache
    if _id_reseller_map_cache is None:
        try:
            _id_reseller_map_cache = \
                {v: k for k, v in cpapi.get_reseller_id_pairs().items()}
        except cpapi.NotSupported:
            _id_reseller_map_cache = {}
    reseller = _id_reseller_map_cache.get(uid)
    return reseller


def _reseller_to_uid_local(name):
    # type: (str) -> Optional[int]
    return _get_name_map().get_id(name)


def reseller_to_uid(name):
    result = _reseller_to_uid_local(name)
    if result is not None:
        return serialize_lve_id(LIMIT_LVP_ID, result)


def username_to_uid_local(username):
    # type: (str) -> Optional[int]
    try:
        return pwd.getpwnam(username).pw_uid
    except KeyError:
        return None


def _uid_to_username_db(uid, server_id, db_engine):
    # type: (int, str, Engine) -> Optional[str]
    session = sessionmaker(bind=db_engine)()
    try:
        user_inst = session.query(user).filter(user.uid == uid,
                                               user.server_id == server_id).one()
    except NoResultFound:
        return None
    finally:
        session.close()

    return user_inst.user_name


def _uid_to_reseller_db(uid, server_id, db_engine):
    # type: (int, str, Engine) -> Optional[str]
    # FIXME: store reseller's names in db (centralized database on Plesk/DA)
    return _uid_to_username_db(uid, server_id, db_engine)


def _username_to_uid_db(username, server_id, db_engine):
    # type: (str, str, Engine) -> Optional[int]
    session = sessionmaker(bind=db_engine)()
    try:
        user_inst = session.query(user).filter(user.user_name == username,
                                               user.server_id == server_id).one()
    except NoResultFound:
        return None
    finally:
        session.close()

    return user_inst.uid


def uid_to_username(uid, local_server_id, server_id, db_engine):
    # type: (int, str, str, Engine) -> Optional[str]
    if None in (uid, local_server_id, server_id, db_engine):
        raise ValueError("All parameters should be specified and not None for uid_to_username()")

    uid, is_reseller = deserialize_lve_id(uid)
    uid_to_name_local_func = _uid_to_reseller_local if is_reseller else uid_to_username_local
    uid_to_name_database_func = _uid_to_reseller_db if is_reseller else _uid_to_username_db

    if server_id == local_server_id:
        result = uid_to_name_local_func(uid)
        if result:
            return result

    return uid_to_name_database_func(uid, server_id, db_engine)


def username_to_uid(username, local_server_id, server_id, db_engine):
    # type: (str, str, str, Engine) -> Optional[int]
    """
    Lookups for uid in local user database (/etc/passwd) and global one (table lve_stats2_user).
    If local_server_id equals to server_id then local user database has priority.
    """
    if None in (username, local_server_id, server_id, db_engine):
        raise ValueError("All parameters should be specified and not None for username_to_uid()")

    if server_id == local_server_id:
        result = username_to_uid_local(username)
        if result:
            return result

    return _username_to_uid_db(username, server_id, db_engine)


def convert_id_to_lvp_id(any_id):
    # type: (int) -> int
    dummy, is_reseller = deserialize_lve_id(any_id)
    if is_reseller:
        return any_id
    else:
        return serialize_lve_id(LIMIT_LVP_ID, any_id)


def convert_name_to_lvp_id(name):
    # type: (str) -> int
    lvp_id = reseller_to_uid(name)
    if lvp_id:
        return lvp_id
    return -1
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