Synnefo

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from datetime import datetime

import uuid

from django.core.validators import validate_email

from django.utils.timesince import timesince, timeuntil

from django.contrib.auth.models import Permission

from django.contrib.contenttypes.models import ContentType

from django.core.exceptions import FieldError

from django.core.management import CommandError

from synnefo.util import units

from synnefo.lib.ordereddict import OrderedDict

from astakos.im.models import AstakosUser

from astakos.im.resources import get_resources

DEFAULT_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__iexact=email_or_id, **kwargs)

    except AstakosUser.DoesNotExist, AstakosUser.MultipleObjectsReturned:

        return None

def get_astakosuser_content_type():

    try:

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

                                       model='astakosuser')

    except:

        return DEFAULT_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

def is_uuid(s):

    if s is None:

        return False

    try:

        uuid.UUID(s)

    except ValueError:

        return False

    else:

        return True

def is_email(s):

    if s is None:

        return False

    try:

        validate_email(s)

    except:

        return False

    else:

        return True

style_options = ', '.join(units.STYLES)

def check_style(style):

    if style not in units.STYLES:

        m = "Invalid unit style. Valid ones are %s." % style_options

        raise CommandError(m)

class ResourceDict(object):

    _object = None

    @classmethod

    def get(cls):

        if cls._object is None:

            cls._object = get_resources()

        return cls._object

def show_resource_value(number, resource, style):

    resource_dict = ResourceDict.get()

    unit = resource_dict[resource]['unit']

    return units.show(number, unit, style)

def show_quotas(qh_quotas, astakos_initial, info=None, style=None):

    labels = ('source', 'resource', 'base quota', 'total quota', 'usage')

    if info is not None:

        labels = ('uuid', 'email') + labels

    print_data = []

    for holder, holder_quotas in qh_quotas.iteritems():

        h_initial = astakos_initial.get(holder)

        if info is not None:

            email = info.get(holder, "")

        for source, source_quotas in holder_quotas.iteritems():

            s_initial = h_initial.get(source) if h_initial else None

            for resource, values in source_quotas.iteritems():

                initial = s_initial.get(resource) if s_initial else None

                initial = show_resource_value(initial, resource, style)

                limit = show_resource_value(values['limit'], resource, style)

                usage = show_resource_value(values['usage'], resource, style)

                fields = (source, resource, initial, limit, usage)

                if info is not None:

                    fields = (holder, email) + fields

                print_data.append(fields)

    return print_data, labels