lc_ldap/attributs.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# ATTRIBUTS.PY-- Description des attributs ldap
#
# Copyright (C) 2010 Cr@ns <roots@crans.org>
# Author: Antoine Durand-Gasselin <adg@crans.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# * Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# * Neither the name of the Cr@ns nor the names of its contributors may
#   be used to endorse or promote products derived from this software
#   without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT
# HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import re
from unicodedata import normalize

def normalize_and_validate(attr, vals, ctxt):
    """Vérifie que attr peut se voir attribuer les valeurs vals"""
    a = eval('%s()' % attr)
    new_vals = a.normalize(vals, ctxt)
    a.validate(new_vals, ctxt)
    return new_vals

def validate_name(value, more_chars=""):
    """Valide un nom: ie un unicode qui contient lettres, espaces et
    apostrophes, et éventuellement des caractères additionnels"""
    return re.match("[A-Za-z][-' A-Za-z%s]*" %  more_chars,
                    normalize('NFKD', value).encode('ASCII', 'ignore'))

def validate_mac(value):
    """Vérifie qu'une adresse mac est valide"""
    return True

def attrify(val, attr, ldif, ctxt_check = True):
    """Transforme un n'importe quoi en Attr.

    Doit effectuer les normalisations et sanity check si un str ou un
    unicode est passé en argument.
    Devrait insulter en cas de potentiel problème d'encodage.
    Doit effectuer les vérifications de contexte dans le *ldif* si
    ctxt_check est vrai"""

    return val if isinstance(val, Attr) else CRANS_ATTRIBUTES[attr](val, ldif)

class Attr(object):
    legend = "Human-readable description of attribute"
    singlevalue = None
    optional = None

    def __init__(self, val, ldif):
        assert isinstance(val, unicode)
        self.parse_value(val)
        self.validate(ldif)

    def parse_value(self, val):
        self.value = val

    def __str__(self):
        unicode.encode(unicode(self), 'utf-8')

    def validate(self, ldif):
        """validates:
        vérifie déjà que ce qu'on a rentré est parsable"""
        self._check_cardinality(ldif)
        self._check_uniqueness(ldif)
        self._check_users_restrictions(ldif)

    def normalize(self, values, uldif):
        "normalizes"
        return values

    def _check_cardinality(self, values):
        """Vérifie qu'il y a un nombre correct de valeur =1, <=1, {0,1},
        etc..."""
        if self.singlevalue and len(values) > 1:
            raise ValueError(u'%s doit avoir au maximum une valeur (affecte %s)' % self.__class__, values)
        if not self.optional and len(values) == 0:
            raise ValueError('%s doit avoir au moins une valeur' % self.__class__)

    def _check_type(self, values):
        """Vérifie que les valeurs ont le bon type (nom est un mot, tel
        est un nombre, etc...)"""
        for v in values:
            assert isinstance(v, unicode)

    def _check_uniqueness(self, values):
        """Vérifie l'unicité dans la base de la valeur (mailAlias, chbre,
        etc...)"""
        pass

    def _check_values(self, values):
        """Vérifie que les valeurs sont valides (typiquement chbre)"""
        pass

    def _check_users_restrictions(self, values):
        """Vérifie les restrictions supplémentaires imposées selon les
        niveaux de droits (<= 3 mailAlias, pas de mac identiques,
        etc...)"""
        pass

    def can_modify(self):
        """Vérifie si l'attribut est modifiable"""
        return False


class objectClass(Attr):
    singlevalue = False
    optional = False
    legend = "entité"

class nom(Attr):
    singlevalue = True
    optional = False
    legend = "Nom"
    def _check_type(self, values):
        return [ validate_name(v) for v in values]

    def normalize(self, values, uldif):
        return [ v.strip().capitalize() for v in values ]

class prenom(Attr):
    singlevalue = True
    optional = False
    legend = u"Prénom"
    def _check_type(self, values):
        return [ validate_name(v) for v in values ]

    def normalize(self, values, uldif):
        return [ values.strip().capitalize() for v in values ]

class tel(Attr):
    singlevalue = True
    optional = False
    legend = u"Téléphone"

    def normalize(self, value, uldif):
        return value # XXX - To implement

class paiement(Attr):
    singlevallue = False
    optional = True
    legend = u"Paiement"

    def normalize(self, values, uldif):
        return values # XXX - To implement

class carteEtudiant(Attr):
    singlevalue = False
    optional = True
    legend = u"Carte d'étudiant"

class mailAlias(Attr):
    singlevalue = False
    optional = True
    legend = u"Alias mail"

class canonicalAlias(Attr):
    singlevalue = True
    optional = False
    legend = u"Alias mail canonique"

class etudes(Attr):
    singlevalue = False
    optional = False
    legend = u"Études"

class chbre(Attr):
    singlevalue = True
    optional = False
    legend = u"Chambre sur le campus"

class droits(Attr):
    singlevalue = False
    optional = True
    legend = u"Droits sur les serveurs"

class solde(Attr):
    singlevalue = True
    optional = True
    legend = u"Solde d'impression"


class host(Attr):
    singlevalue = True
    optional = False
    hname = legend = u"Nom d'hôte"

class macAddress(Attr):
    singlevalue = True
    optional = False
    legend = u"Adresse physique de la carte réseau"
    hname = "Adresse MAC"

class ipHostNumber(Attr):
    singlevalue = True
    optional = False
    legend = u"Adresse IPv4 de la machine"
    hname = "IPv4"

class mid(Attr):
    singlevalue = True
    optional = False
    legend = "Identifiant de machine"

class hostAlias(Attr):
    singlevalue = False
    optional = True
    legend = u'Alias de nom de machine'

class ipsec(Attr):
    singlevalue = False
    optional = True
    legend = u'Clef wifi'

class puissance(Attr):
    singlevalue = True
    optional = True
    legend = u"puissance d'émission pour les bornes wifi"

class canal(Attr):
    singlevalue = True
    optional = True
    legend = u'Canal d\'émission de la borne'

class portTCPout(Attr):
    singlevalue = False
    optional = True
    legend = u'Port TCP ouvert vers l\'extérieur'

class portTCPin(Attr):
    singlevalue = False
    optional = True
    legend = u"Port TCP ouvert depuis l'extérieur"

class portUDPout(Attr):
    singlevalue = False
    optional = True
    legend = u"Port UDP ouvert vers l'extérieur"

class portUDPin(Attr):
    singlevalue = False
    optional = True
    legend = u"Port UDP ouvert depuis l'extérieur"

class prise(Attr):
    singlevalue = True
    optional = True
    legend = u"Prise sur laquelle est branchée la machine"

class cid(Attr):
    singlevalue = True
    optional = True
    legend = u"Identifiant du club"

class responsable(Attr):
    singlevalue = True
    optional = True
    legend = u"Responsable du club"


class blacklist(Attr):
    singlevalue = False
    optional = True
    legend = u"Blackliste"

class historique(Attr):
    singlevalue = False
    optional = True
    legend = u"Historique de l'objet"


CRANS_ATTRIBUTES= {
'objectClass' : objectClass,
'nom' : nom,
'prenom' : prenom,
'tel' : tel,
'paiement' : paiement,
'carteEtudiant' : carteEtudiant,
'mailAlias' : mailAlias,
'canonicalAlias' : canonicalAlias,
'etudes' : etudes,
'chbre' : chbre,
'droits' : droits,
'solde' : solde,
'mid' : mid,
'hostAlias' : hostAlias,
'ipsec' : ipsec,
'puissance' : puissance,
'canal' : canal,
'portTCPout' : portTCPout,
'portTCPin' : portTCPin,
'portUDPout' : portUDPout,
'portUDPin' : portUDPin,
'prise' : prise,
'cid' : cid,
'responsable' : responsable,
'blacklist' : blacklist,
'historique' : historique
}