Synnefo » astakos

# Copyright 2011-2012 GRNET S.A. All rights reserved.

# 

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

# 

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

# 

#   2. 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.

# 

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``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 GRNET S.A OR

# CONTRIBUTORS 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 NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

# 

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

import hashlib

import uuid

from time import asctime

from datetime import datetime, timedelta

from base64 import b64encode

from django.db import models

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

from astakos.im.settings import DEFAULT_USER_LEVEL, INVITATIONS_PER_LEVEL, AUTH_TOKEN_DURATION, BILLING_FIELDS, QUEUE_EXCHANGE

from synnefo.lib.queue import exchange_connect, exchange_send, exchange_close, Receipt

QUEUE_CLIENT_ID = 3 # Astakos.

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, blank=True)

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

    #for invitations

    user_level = DEFAULT_USER_LEVEL

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

    invitations = models.IntegerField('Invitations left', default=INVITATIONS_PER_LEVEL[user_level])

    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)

    # ex. screen_name for twitter, eppn for shibboleth

    third_party_identifier = models.CharField('Third-party identifier', max_length=255, null=True, blank=True)

    @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 invitation(self):

        try:

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

        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()

        if not self.id:

            # set username

            while not self.username:

                username =  uuid.uuid4().hex[:30]

                try:

                    AstakosUser.objects.get(username = username)

                except AstakosUser.DoesNotExist, e:

                    self.username = username

            self.is_active = False

            if not self.provider:

                self.provider = 'local'

        report_user_event(self)

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

    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=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)

def report_user_event(user):

    def should_send(user):

        # report event incase of new user instance

        # or if specific fields are modified

        if not user.id:

            return True

        db_instance = AstakosUser.objects.get(id = user.id)

        for f in BILLING_FIELDS:

            if (db_instance.__getattribute__(f) != user.__getattribute__(f)):

                return True

        return False

    if QUEUE_EXCHANGE and should_send(user):

        l = [[elem, str(user.__getattribute__(elem))] for elem in BILLING_FIELDS]

        details = dict(l)

        details['eventType'] = 'create' if not user.id else 'modify'

        body = Receipt(QUEUE_CLIENT_ID, user.email, '', 0, details).format()

        conn = exchange_connect(QUEUE_EXCHANGE)

        routing_key = QUEUE_EXCHANGE.replace('#', body['id'])

        exchange_send(conn, routing_key, body)

        exchange_close(conn)