Synnefo » astakos

# Copyright 2011 GRNET S.A. All rights reserved.

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import logging

import hashlib

from time import asctime

from datetime import datetime, timedelta

from base64 import b64encode

from django.conf import settings

from django.db import models

from django.contrib.auth.models import User, UserManager

from astakos.im.interface import get_quota, set_quota

class AstakosUser(User):

    """

    Extends ``django.contrib.auth.models.User`` by defining additional fields.

    """

    # Use UserManager to get the create_user method, etc.

    objects = UserManager()

    affiliation = models.CharField('Affiliation', max_length=255, default='')

    provider = models.CharField('Provider', max_length=255, default='')

    #for invitations

    level = models.IntegerField('Inviter level', default=4)

    invitations = models.IntegerField('Invitations left', default=0)

    auth_token = models.CharField('Authentication Token', max_length=32,

                                  null=True, blank=True)

    auth_token_created = models.DateTimeField('Token creation date', null=True)

    auth_token_expires = models.DateTimeField('Token expiration date', null=True)

    updated = models.DateTimeField('Update date')

    is_verified = models.BooleanField('Is verified?', default=False)

    @property

    def realname(self):

        return '%s %s' %(self.first_name, self.last_name)

    @realname.setter

    def realname(self, value):

        parts = value.split(' ')

        if len(parts) == 2:

            self.first_name = parts[0]

            self.last_name = parts[1]

        else:

            self.last_name = parts[0]

    @property

    def quota(self):

        return get_quota(self.username)

    @quota.setter

    def quota(self, value):

        set_quota(self.username, value)

    @property

    def invitation(self):

        try:

            return Invitation.objects.get(username=self.username)

        except Invitation.DoesNotExist:

            return None

    def save(self, update_timestamps=True, **kwargs):

        if update_timestamps:

            if not self.id:

                self.date_joined = datetime.now()

            self.updated = datetime.now()

        super(AstakosUser, self).save(**kwargs)

        #invitation consume

        if self.invitation and not self.invitation.is_consumed:

            self.invitation.consume()

    def renew_token(self):

        md5 = hashlib.md5()

        md5.update(self.username)

        md5.update(self.realname.encode('ascii', 'ignore'))

        md5.update(asctime())

        self.auth_token = b64encode(md5.digest())

        self.auth_token_created = datetime.now()

        self.auth_token_expires = self.auth_token_created + \

                                  timedelta(hours=settings.AUTH_TOKEN_DURATION)

    def __unicode__(self):

        return self.username

class Invitation(models.Model):

    """

    Model for registring invitations

    """

    inviter = models.ForeignKey(AstakosUser, related_name='invitations_sent',

                                null=True)

    realname = models.CharField('Real name', max_length=255)

    username = models.CharField('Unique ID', max_length=255)

    code = models.BigIntegerField('Invitation code', db_index=True)

    #obsolete: we keep it just for transfering the data

    is_accepted = models.BooleanField('Accepted?', default=False)

    is_consumed = models.BooleanField('Consumed?', default=False)

    created = models.DateTimeField('Creation date', auto_now_add=True)

    #obsolete: we keep it just for transfering the data

    accepted = models.DateTimeField('Acceptance date', null=True, blank=True)

    consumed = models.DateTimeField('Consumption date', null=True, blank=True)

    def consume(self):

        self.is_consumed = True

        self.consumed = datetime.now()

        self.save()

    def __unicode__(self):

        return '%s -> %s [%d]' % (self.inviter, self.username, self.code)