VirtualMailManager/Alias.py
author Pascal Volk <neverseen@users.sourceforge.net>
Sat, 26 Apr 2008 02:49:34 +0000
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* 'vmm.1' - completed * 'update_tables_0.4-dev_r24.py' - Deleted from repository
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#!/usr/bin/env python
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# -*- coding: UTF-8 -*-
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# Copyright 2007-2008 VEB IT
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# See COPYING for distribution information.
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# $Id$
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"""Virtual Mail Manager's Alias class to manage e-mail aliases."""
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from constants.VERSION import VERSION
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__author__ = 'Pascal Volk <p.volk@veb-it.de>'
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__version__ = VERSION
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__revision__ = 'rev '+'$Rev$'.split()[1]
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__date__ = '$Date$'.split()[1]
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from Exceptions import VMMAliasException
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from Domain import Domain
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import constants.ERROR as ERR
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class Alias:
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    """Class to manage e-mail accounts."""
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    def __init__(self, dbh, address, destination=None):
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        if address == destination:
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            raise VMMAliasException(('Address and destination are identical.',
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                ERR.ALIAS_ADDR_DEST_IDENTICAL))
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        self._dbh = dbh
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        self._addr = address
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        self._dest = destination
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        self._localpart = None
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        self._gid = 0
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        self._isNew = False
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        self._setAddr()
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        if not self._dest is None:
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            self._exists()
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        if self._isAccount():
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            raise VMMAliasException(
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            ('There is already an account with address »%s«' % self._addr,
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                ERR.ACCOUNT_EXISTS))
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    def _exists(self):
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        dbc = self._dbh.cursor()
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        dbc.execute("SELECT gid FROM alias WHERE gid=%s AND address=%s\
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 AND destination=%s", self._gid, self._localpart, self._dest)
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        gid = dbc.fetchone()
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        dbc.close()
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        if gid is None:
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            self._isNew = True
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        else:
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            self._isNew = False
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    def _isAccount(self):
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        dbc = self._dbh.cursor()
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        dbc.execute("SELECT uid FROM users WHERE gid=%s AND local_part=%s",
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                self._gid, self._localpart)
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        uid = dbc.fetchone()
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        dbc.close()
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        if uid is not None:
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            return True
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        else:
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            return False
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    def _setAddr(self):
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        self._localpart, d = self._addr.split('@')
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        dom = Domain(self._dbh, d)
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        self._gid = dom.getID()
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        if self._gid == 0:
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            raise VMMAliasException(("Domain »%s« doesn't exist." % d,
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                ERR.NO_SUCH_DOMAIN))
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    def save(self):
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        if self._dest is None:
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           raise VMMAliasException(('No destination address for alias denoted.',
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               ERR.ALIAS_MISSING_DEST))
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        if self._isNew:
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            dbc = self._dbh.cursor()
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            dbc.execute("INSERT INTO alias (gid, address, destination) VALUES\
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 (%s, %s, %s)", self._gid, self._localpart, self._dest)
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            self._dbh.commit()
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            dbc.close()
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        else:
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            raise VMMAliasException(("Alias already exists.", ERR.ALIAS_EXISTS))
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    def getInfo(self):
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        dbc = self._dbh.cursor()
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        dbc.execute('SELECT destination FROM alias WHERE gid=%s AND address=%s',
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                self._gid, self._localpart)
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        destinations = dbc.fetchall()
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        dbc.close()
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        if len(destinations) > 0:
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            targets = []
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            for destination in destinations:
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                targets.append(destination[0])
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            return targets
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        else:
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            raise VMMAliasException(("Alias doesn't exists", ERR.NO_SUCH_ALIAS))
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    def delete(self):
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        dbc = self._dbh.cursor()
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        if self._dest is None:
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            dbc.execute("DELETE FROM alias WHERE gid=%s AND address=%s",
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                    self._gid, self._localpart)
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        else:
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            dbc.execute("DELETE FROM alias WHERE gid=%s AND address=%s AND \
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 destination=%s", self._gid, self._localpart, self._dest)
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        rowcount = dbc.rowcount
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        dbc.close()
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        if rowcount > 0:
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            self._dbh.commit()
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        else:
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            raise VMMAliasException(("Alias doesn't exists", ERR.NO_SUCH_ALIAS))
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