Updated copyright notices to include the year 2011.
# -*- coding: UTF-8 -*-
# Copyright (c) 2007 - 2011, Pascal Volk
# See COPYING for distribution information.
"""
VirtualMailManager.account
~~~~~~~~~~~~~~~~~~~~~~~~~~
Virtual Mail Manager's Account class to manage e-mail accounts.
"""
from VirtualMailManager.domain import Domain
from VirtualMailManager.emailaddress import EmailAddress
from VirtualMailManager.transport import Transport
from VirtualMailManager.common import version_str
from VirtualMailManager.constants import \
ACCOUNT_EXISTS, ACCOUNT_MISSING_PASSWORD, ALIAS_PRESENT, \
INVALID_ARGUMENT, INVALID_MAIL_LOCATION, NO_SUCH_ACCOUNT, \
NO_SUCH_DOMAIN, UNKNOWN_SERVICE
from VirtualMailManager.errors import AccountError as AErr
from VirtualMailManager.maillocation import MailLocation
from VirtualMailManager.password import pwhash
__all__ = ('SERVICES', 'Account', 'get_account_by_uid')
SERVICES = ('imap', 'pop3', 'smtp', 'sieve')
_ = lambda msg: msg
cfg_dget = lambda option: None
class Account(object):
"""Class to manage e-mail accounts."""
__slots__ = ('_addr', '_dbh', '_domain', '_mail', '_new', '_passwd',
'_transport', '_uid')
def __init__(self, dbh, address):
"""Creates a new Account instance.
When an account with the given *address* could be found in the
database all relevant data will be loaded.
Arguments:
`dbh` : pyPgSQL.PgSQL.Connection
A database connection for the database access.
`address` : VirtualMailManager.EmailAddress.EmailAddress
The e-mail address of the (new) Account.
"""
if not isinstance(address, EmailAddress):
raise TypeError("Argument 'address' is not an EmailAddress")
self._addr = address
self._dbh = dbh
self._domain = Domain(self._dbh, self._addr.domainname)
if not self._domain.gid:
# TP: Hm, what “quotation marks” should be used?
# If you are unsure have a look at:
# http://en.wikipedia.org/wiki/Quotation_mark,_non-English_usage
raise AErr(_(u"The domain '%s' doesn't exist.") %
self._addr.domainname, NO_SUCH_DOMAIN)
self._uid = 0
self._mail = None
self._transport = self._domain.transport
self._passwd = None
self._new = True
self._load()
def __nonzero__(self):
"""Returns `True` if the Account is known, `False` if it's new."""
return not self._new
def _load(self):
"""Load 'uid', 'mid' and 'tid' from the database and set _new to
`False` - if the user could be found. """
dbc = self._dbh.cursor()
dbc.execute('SELECT uid, mid, tid FROM users WHERE gid = %s AND '
'local_part=%s', (self._domain.gid, self._addr.localpart))
result = dbc.fetchone()
dbc.close()
if result:
self._uid, _mid, _tid = result
if _tid != self._transport.tid:
self._transport = Transport(self._dbh, tid=_tid)
self._mail = MailLocation(self._dbh, mid=_mid)
self._new = False
def _set_uid(self):
"""Set the unique ID for the new Account."""
assert self._uid == 0
dbc = self._dbh.cursor()
dbc.execute("SELECT nextval('users_uid')")
self._uid = dbc.fetchone()[0]
dbc.close()
def _prepare(self, maillocation):
"""Check and set different attributes - before we store the
information in the database.
"""
if maillocation.dovecot_version > cfg_dget('misc.dovecot_version'):
raise AErr(_(u"The mailbox format '%(mbfmt)s' requires Dovecot "
u">= v%(version)s") % {'mbfmt': maillocation.mbformat,
'version': version_str(maillocation.dovecot_version)},
INVALID_MAIL_LOCATION)
if not maillocation.postfix and \
self._transport.transport.lower() in ('virtual:', 'virtual'):
raise AErr(_(u"Invalid transport '%(transport)s' for mailbox "
u"format '%(mbfmt)s'") %
{'transport': self._transport,
'mbfmt': maillocation.mbformat}, INVALID_MAIL_LOCATION)
self._mail = maillocation
self._set_uid()
def _update_services(self, activate, *services):
"""Activate or deactivate the Account's services.
Arguments:
`activate`: bool
When `True` the Account's user will be able to login to the
services, otherwise the login will fail.
`*services`
No or one or more of the services: imap, pop3, smtp and sieve
"""
self._chk_state()
if services:
services = set(services)
for service in services:
if service not in SERVICES:
raise AErr(_(u"Unknown service: '%s'") % service,
UNKNOWN_SERVICE)
else:
services = SERVICES
state = ('FALSE', 'TRUE')[activate]
sql = 'UPDATE users SET %s WHERE uid = %u' % (
(' = %(s)s, '.join(services) + ' = %(s)s') % {'s': state},
self._uid)
if 'sieve' in services and \
cfg_dget('misc.dovecot_version') < 0x10200b02:
sql = sql.replace('sieve', 'managesieve')
dbc = self._dbh.cursor()
dbc.execute(sql)
if dbc.rowcount > 0:
self._dbh.commit()
dbc.close()
def _count_aliases(self):
"""Count all alias addresses where the destination address is the
address of the Account."""
dbc = self._dbh.cursor()
dbc.execute('SELECT COUNT(destination) FROM alias WHERE destination '
'= %s', (self._addr,))
a_count = dbc.fetchone()[0]
dbc.close()
return a_count
def _chk_state(self):
"""Raise an AccountError if the Account is new - not yet saved in the
database."""
if self._new:
raise AErr(_(u"The account '%s' doesn't exist.") % self._addr,
NO_SUCH_ACCOUNT)
@property
def address(self):
"""The Account's EmailAddress instance."""
return self._addr
@property
def domain(self):
"""The Domain to which the Account belongs to."""
if self._domain:
return self._domain
return None
@property
def gid(self):
"""The Account's group ID."""
if self._domain:
return self._domain.gid
return None
@property
def home(self):
"""The Account's home directory."""
if not self._new:
return '%s/%s' % (self._domain.directory, self._uid)
return None
@property
def mail_location(self):
"""The Account's MailLocation."""
return self._mail
@property
def uid(self):
"""The Account's unique ID."""
return self._uid
def set_password(self, password):
"""Set a password for the new Account.
If you want to update the password of an existing Account use
Account.modify().
Argument:
`password` : basestring
The password for the new Account.
"""
if not isinstance(password, basestring) or not password:
raise AErr(_(u"Could not accept password: '%s'") % password,
ACCOUNT_MISSING_PASSWORD)
self._passwd = password
def set_transport(self, transport):
"""Set the transport for the new Account.
If you want to update the transport of an existing Account use
Account.modify().
Argument:
`transport` : basestring
The string representation of the transport, e.g.: 'dovecot:'
"""
self._transport = Transport(self._dbh, transport=transport)
def enable(self, *services):
"""Enable all or the given service/s for the Account.
Possible *services* are: 'imap', 'pop3', 'sieve' and 'smtp'.
When all services should be enabled, give no service name.
Arguments:
`*services` : basestring
No or one or more of the services 'imap', 'pop3', 'smtp', and
'sieve'.
"""
self._update_services(True, *services)
def disable(self, *services):
"""Disable all or the given service/s for the Account.
For more information see: Account.enable()."""
self._update_services(False, *services)
def save(self):
"""Save the new Account in the database."""
if not self._new:
raise AErr(_(u"The account '%s' already exists.") % self._addr,
ACCOUNT_EXISTS)
if not self._passwd:
raise AErr(_(u"No password set for '%s'.") % self._addr,
ACCOUNT_MISSING_PASSWORD)
if cfg_dget('misc.dovecot_version') >= 0x10200b02:
sieve_col = 'sieve'
else:
sieve_col = 'managesieve'
self._prepare(MailLocation(self._dbh, mbfmt=cfg_dget('mailbox.format'),
directory=cfg_dget('mailbox.root')))
dbc = self._dbh.cursor()
dbc.execute('INSERT INTO users (local_part, passwd, uid, gid, mid, '
'tid, smtp, pop3, imap, %s) VALUES' % (sieve_col,) + \
'(%s, %s, %s, %s, %s, %s, %s, %s, %s, %s)',
(self._addr.localpart,
pwhash(self._passwd, user=self._addr), self._uid,
self._domain.gid, self._mail.mid, self._transport.tid,
cfg_dget('account.smtp'), cfg_dget('account.pop3'),
cfg_dget('account.imap'), cfg_dget('account.sieve')))
self._dbh.commit()
dbc.close()
self._new = False
def modify(self, field, value):
"""Update the Account's *field* to the new *value*.
Possible values for *field* are: 'name', 'password' and
'transport'. *value* is the *field*'s new value.
Arguments:
`field` : basestring
The attribute name: 'name', 'password' or 'transport'
`value` : basestring
The new value of the attribute.
"""
if field not in ('name', 'password', 'transport'):
raise AErr(_(u"Unknown field: '%s'") % field, INVALID_ARGUMENT)
self._chk_state()
dbc = self._dbh.cursor()
if field == 'password':
dbc.execute('UPDATE users SET passwd = %s WHERE uid = %s',
(pwhash(value, user=self._addr), self._uid))
elif field == 'transport':
if value != self._transport.transport:
self._transport = Transport(self._dbh, transport=value)
dbc.execute('UPDATE users SET tid = %s WHERE uid = %s',
(self._transport.tid, self._uid))
else:
dbc.execute('UPDATE users SET name = %s WHERE uid = %s',
(value, self._uid))
if dbc.rowcount > 0:
self._dbh.commit()
dbc.close()
def get_info(self):
"""Returns a dict with some information about the Account.
The keys of the dict are: 'address', 'gid', 'home', 'imap'
'mail_location', 'name', 'pop3', 'sieve', 'smtp', transport' and
'uid'.
"""
self._chk_state()
if cfg_dget('misc.dovecot_version') >= 0x10200b02:
sieve_col = 'sieve'
else:
sieve_col = 'managesieve'
sql = 'SELECT name, smtp, pop3, imap, %s FROM users WHERE uid = %d' % \
(sieve_col, self._uid)
dbc = self._dbh.cursor()
dbc.execute(sql)
info = dbc.fetchone()
dbc.close()
if info:
keys = ('name', 'smtp', 'pop3', 'imap', sieve_col)
info = dict(zip(keys, info))
for service in keys[1:]:
if info[service]:
# TP: A service (pop3/imap) is enabled/usable for a user
info[service] = _('enabled')
else:
# TP: A service (pop3/imap) isn't enabled/usable for a user
info[service] = _('disabled')
info['address'] = self._addr
info['gid'] = self._domain.gid
info['home'] = '%s/%s' % (self._domain.directory, self._uid)
info['mail_location'] = self._mail.mail_location
info['transport'] = self._transport.transport
info['uid'] = self._uid
return info
# nearly impossible‽
raise AErr(_(u"Could not fetch information for account: '%s'") %
self._addr, NO_SUCH_ACCOUNT)
def get_aliases(self):
"""Return a list with all alias e-mail addresses, whose destination
is the address of the Account."""
self._chk_state()
dbc = self._dbh.cursor()
dbc.execute("SELECT address ||'@'|| domainname FROM alias, "
"domain_name WHERE destination = %s AND domain_name.gid = "
"alias.gid AND domain_name.is_primary ORDER BY address",
(str(self._addr),))
addresses = dbc.fetchall()
dbc.close()
aliases = []
if addresses:
aliases = [alias[0] for alias in addresses]
return aliases
def delete(self, force=False):
"""Delete the Account from the database.
Argument:
`force` : bool
if *force* is `True`, all aliases, which points to the Account,
will be also deleted. If there are aliases and *force* is
`False`, an AccountError will be raised.
"""
if not isinstance(force, bool):
raise TypeError('force must be a bool')
self._chk_state()
dbc = self._dbh.cursor()
if force:
dbc.execute('DELETE FROM users WHERE uid = %s', (self._uid),)
# delete also all aliases where the destination address is the same
# as for this account.
dbc.execute("DELETE FROM alias WHERE destination = %s",
(str(self._addr),))
self._dbh.commit()
else: # check first for aliases
a_count = self._count_aliases()
if a_count > 0:
dbc.close()
raise AErr(_(u"There are %(count)d aliases with the "
u"destination address '%(address)s'.") %
{'count': a_count, 'address': self._addr},
ALIAS_PRESENT)
dbc.execute('DELETE FROM users WHERE uid = %s', (self._uid,))
self._dbh.commit()
dbc.close()
self._new = True
self._uid = 0
self._addr = self._dbh = self._domain = self._passwd = None
self._mail = self._transport = None
def get_account_by_uid(uid, dbh):
"""Search an Account by its UID.
This function returns a dict (keys: 'address', 'gid' and 'uid'), if an
Account with the given *uid* exists.
Argument:
`uid` : long
The Account unique ID.
`dbh` : pyPgSQL.PgSQL.Connection
a database connection for the database access.
"""
try:
uid = long(uid)
except ValueError:
raise AErr(_(u'UID must be an int/long.'), INVALID_ARGUMENT)
if uid < 1:
raise AErr(_(u'UID must be greater than 0.'), INVALID_ARGUMENT)
dbc = dbh.cursor()
dbc.execute("SELECT local_part||'@'|| domain_name.domainname AS address, "
"uid, users.gid FROM users LEFT JOIN domain_name ON "
"(domain_name.gid = users.gid AND is_primary) WHERE uid = %s",
(uid,))
info = dbc.fetchone()
dbc.close()
if not info:
raise AErr(_(u"There is no account with the UID '%d'.") % uid,
NO_SUCH_ACCOUNT)
info = dict(zip(('address', 'uid', 'gid'), info))
return info
del _, cfg_dget