# -*- coding: UTF-8 -*-

# Copyright (c) 2008 - 2009, VEB IT

# See COPYING for distribution information.

"""Virtual Mail Manager's Relocated class to manage relocated users."""

from constants.VERSION import *

from Exceptions import VMMRelocatedException as VMMRE

from Domain import Domain

from EmailAddress import EmailAddress

import constants.ERROR as ERR

import VirtualMailManager as VMM

class Relocated(object):

    """Class to manage e-mail addresses of relocated users."""

    __slots__ = ('_addr', '_dest', '_gid', '_isNew', '_dbh')

    def __init__(self, dbh, address, destination=None):

        if isinstance(address, EmailAddress):

            self._addr = address

        else:

            raise TypeError("Argument 'address' is not an EmailAddress")

        if destination is None:

            self._dest = None

        elif isinstance(destination, EmailAddress):

            self._dest = destination

        else:

            raise TypeError("Argument 'destination' is not an EmailAddress")

        if address == destination:

            raise VMMRE(_(u"Address and destination are identical."),

                ERR.RELOCATED_ADDR_DEST_IDENTICAL)

        self._dbh = dbh

        self._gid = 0

        self._isNew = False

        self._setAddr()

        self._exists()

        if self._isNew and VMM.VirtualMailManager.accountExists(self._dbh,

                self._addr):

            raise VMMRE(_(u"There is already an account with address »%s«.") %\

                    self._addr, ERR.ACCOUNT_EXISTS)

        if self._isNew and VMM.VirtualMailManager.aliasExists(self._dbh,

                self._addr):

            raise VMMRE(

                    _(u"There is already an alias with the address »%s«.") %\

                    self._addr, ERR.ALIAS_EXISTS)

    def _exists(self):

        dbc = self._dbh.cursor()

        dbc.execute("SELECT gid FROM relocated WHERE gid = %s AND address = %s",

                self._gid, self._addr._localpart)

        gid = dbc.fetchone()

        dbc.close()

        if gid is None:

            self._isNew = True

    def _setAddr(self):

        dom = Domain(self._dbh, self._addr._domainname)

        self._gid = dom.getID()

        if self._gid == 0:

            raise VMMRE(_(u"The domain »%s« doesn't exist yet.") %\

                    self._addr._domainname, ERR.NO_SUCH_DOMAIN)

    def save(self):

        if self._dest is None:

           raise VMMRE(_(u"No destination address for relocated user denoted."),

               ERR.RELOCATED_MISSING_DEST)

        if self._isNew:

            dbc = self._dbh.cursor()

            dbc.execute("INSERT INTO relocated VALUES (%s, %s, %s)",

                    self._gid, self._addr._localpart, str(self._dest))

            self._dbh.commit()

            dbc.close()

        else:

            raise VMMRE(

                    _(u"The relocated user »%s« already exists.") % self._addr,

                    ERR.RELOCATED_EXISTS)

    def getInfo(self):

        dbc = self._dbh.cursor()

        dbc.execute('SELECT destination FROM relocated WHERE gid=%s\

 AND address=%s',

                self._gid, self._addr._localpart)

        destination = dbc.fetchone()

        dbc.close()

        if destination is not None:

            return destination[0]

        else:

            raise VMMRE(

                    _(u"The relocated user »%s« doesn't exists.") % self._addr,

                    ERR.NO_SUCH_RELOCATED)

    def delete(self):

        dbc = self._dbh.cursor()

        dbc.execute("DELETE FROM relocated WHERE gid = %s AND address = %s",

                self._gid, self._addr._localpart)

        rowcount = dbc.rowcount

        dbc.close()

        if rowcount > 0:

            self._dbh.commit()

        else:

            raise VMMRE(

                    _(u"The relocated user »%s« doesn't exists.") % self._addr,

                    ERR.NO_SUCH_RELOCATED)