#!/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

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

    def __init__(self):
        pass

    def validate(self, values, uldif):
        "validates"
        self._check_cardinality(values)
        self._check_type(values)
        self._check_uniqueness(values)
        self._check_values(values)
        self._check_users_restrictions(values)

    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()
}