Synnefo

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from astakos.im.models import Resource

from astakos.im.quotas import qh_add_resource_limit, qh_sync_new_resource

import logging

logger = logging.getLogger(__name__)

fields = ['name', 'desc', 'unit']

class ResourceException(Exception):

    pass

def add_resource(service, resource_dict):

    name = resource_dict.get('name')

    if not name:

        raise ResourceException("Malformed resource dict.")

    try:

        r = Resource.objects.get_for_update(name=name)

        exists = True

    except Resource.DoesNotExist:

        r = Resource(uplimit=0)

        exists = False

    r.service = service

    for field in fields:

        value = resource_dict.get(field)

        if value is not None:

            setattr(r, field, value)

    r.save()

    if not exists:

        qh_sync_new_resource(r, 0)

    if exists:

        logger.info("Updated resource %s." % (name))

    else:

        logger.info("Added resource %s." % (name))

    return exists

def update_resource(resource, uplimit):

    old_uplimit = resource.uplimit

    resource.uplimit = uplimit

    resource.save()

    logger.info("Updated resource %s with limit %s."

                % (resource.name, uplimit))

    diff = uplimit - old_uplimit

    if diff != 0:

        qh_add_resource_limit(resource, diff)

def get_resources(resources=None, services=None):

    if resources is None:

        rs = Resource.objects.all()

    else:

        rs = Resource.objects.filter(name__in=resources)

    if services is not None:

        rs = rs.filter(service__in=services)

    resource_dict = {}

    for r in rs:

        resource_dict[r.full_name()] = r.get_info()

    return resource_dict