Synnefo

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

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#      disclaimer.

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#      provided with the distribution.

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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

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from datetime import datetime

from django.utils.timesince import timesince, timeuntil

from django.contrib.auth.models import Permission

from django.contrib.contenttypes.models import ContentType

from astakos.im.models import AstakosUser

content_type = None

def get_user(email_or_id, **kwargs):

    try:

        if email_or_id.isdigit():

            return AstakosUser.objects.get(id=int(email_or_id))

        else:

            return AstakosUser.objects.get(email=email_or_id, **kwargs)

    except AstakosUser.DoesNotExist, AstakosUser.MultipleObjectsReturned:

        return None

def format_bool(b):

    return 'YES' if b else 'NO'

def format_date(d):

    if not d:

        return ''

    if d < datetime.now():

        return timesince(d) + ' ago'

    else:

        return 'in ' + timeuntil(d)

def get_astakosuser_content_type():

    if content_type:

        return content_type

    try:

        return ContentType.objects.get(app_label='im',

                                       model='astakosuser')

    except:

        return content_type

def add_user_permission(user, pname):

    content_type = get_astakosuser_content_type()

    if user.has_perm(pname):

        return 0, None

    p, created = Permission.objects.get_or_create(codename=pname,

                                                  name=pname.capitalize(),

                                                  content_type=content_type)

    user.user_permissions.add(p)

    return 1, created

def add_group_permission(group, pname):

    content_type = get_astakosuser_content_type()

    if pname in [p.codename for p in group.permissions.all()]:

        return 0, None

    content_type = ContentType.objects.get(app_label='im',

                                           model='astakosuser')

    p, created = Permission.objects.get_or_create(codename=pname,

                                                  name=pname.capitalize(),

                                                  content_type=content_type)

    group.permissions.add(p)

    return 1, created

def remove_user_permission(user, pname):

    content_type = get_astakosuser_content_type()

    if user.has_perm(pname):

        return 0

    try:

        p = Permission.objects.get(codename=pname,

                                    content_type=content_type)

        user.user_permissions.remove(p)

        return 1

    except Permission.DoesNotExist:

        return -1

def remove_group_permission(group, pname):

    content_type = get_astakosuser_content_type()

    if pname not in [p.codename for p in group.permissions.all()]:

        return 0

    try:

        p = Permission.objects.get(codename=pname,

                                    content_type=content_type)

        group.permissions.remove(p)

        return 1

    except Permission.DoesNotExist:

        return -1