Synnefo

# Copyright 2013 GRNET S.A. All rights reserved.

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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 django.utils import simplejson as json

from django.views.decorators.csrf import csrf_exempt

from django.http import HttpResponse

from django.db import transaction

from snf_django.lib import api

from snf_django.lib.api.faults import BadRequest, ItemNotFound

from django.core.cache import cache

from astakos.im import settings

from astakos.im import register

from astakos.im.quotas import get_user_quotas, service_get_quotas

import astakos.quotaholder_app.exception as qh_exception

import astakos.quotaholder_app.callpoint as qh

from .util import (json_response, is_integer, are_integer,

                   user_from_token, component_from_token)

def get_visible_resources():

    key = "resources"

    result = cache.get(key)

    if result is None:

        result = register.get_api_visible_resources()

        cache.set(key, result, settings.RESOURCE_CACHE_TIMEOUT)

    return result

@api.api_method(http_method='GET', token_required=True, user_required=False)

@user_from_token

def quotas(request):

    visible_resources = get_visible_resources()

    resource_names = [r.name for r in visible_resources]

    result = get_user_quotas(request.user, resources=resource_names)

    return json_response(result)

@api.api_method(http_method='GET', token_required=True, user_required=False)

@component_from_token

def service_quotas(request):

    user = request.GET.get('user')

    users = [user] if user is not None else None

    result = service_get_quotas(request.component_instance, users=users)

    if user is not None and result == {}:

        raise ItemNotFound("No such user '%s'" % user)

    return json_response(result)

@api.api_method(http_method='GET', token_required=False, user_required=False)

def resources(request):

    resources = get_visible_resources()

    result = register.resources_to_dict(resources)

    return json_response(result)

@csrf_exempt

def commissions(request):

    method = request.method

    if method == 'GET':

        return get_pending_commissions(request)

    elif method == 'POST':

        return issue_commission(request)

    return api.api_method_not_allowed(request, allowed_methods=['GET', 'POST'])

@api.api_method(http_method='GET', token_required=True, user_required=False)

@component_from_token

def get_pending_commissions(request):

    client_key = str(request.component_instance)

    result = qh.get_pending_commissions(clientkey=client_key)

    return json_response(result)

def _provisions_to_list(provisions):

    lst = []

    for provision in provisions:

        try:

            holder = provision['holder']

            source = provision['source']

            resource = provision['resource']

            quantity = provision['quantity']

            key = (holder, source, resource)

            lst.append((key, quantity))

            if not is_integer(quantity):

                raise ValueError()

        except (TypeError, KeyError, ValueError):

            raise BadRequest("Malformed provision %s" % str(provision))

    return lst

@csrf_exempt

@api.api_method(http_method='POST', token_required=True, user_required=False)

@component_from_token

def issue_commission(request):

    data = request.body

    try:

        input_data = json.loads(data)

    except json.JSONDecodeError:

        raise BadRequest("POST data should be in json format.")

    client_key = str(request.component_instance)

    provisions = input_data.get('provisions')

    if provisions is None:

        raise BadRequest("Provisions are missing.")

    if not isinstance(provisions, list):

        raise BadRequest("Provisions should be a list.")

    provisions = _provisions_to_list(provisions)

    force = input_data.get('force', False)

    if not isinstance(force, bool):

        raise BadRequest('"force" option should be a boolean.')

    auto_accept = input_data.get('auto_accept', False)

    if not isinstance(auto_accept, bool):

        raise BadRequest('"auto_accept" option should be a boolean.')

    name = input_data.get('name', "")

    if not isinstance(name, basestring):

        raise BadRequest("Commission name should be a string.")

    try:

        result = _issue_commission(clientkey=client_key,

                                   provisions=provisions,

                                   name=name,

                                   force=force,

                                   accept=auto_accept)

        data = {"serial": result}

        status_code = 201

    except (qh_exception.NoCapacityError,

            qh_exception.NoQuantityError) as e:

        status_code = 413

        body = {"message": e.message,

                "code": status_code,

                "data": e.data,

                }

        data = {"overLimit": body}

    except qh_exception.NoHoldingError as e:

        status_code = 404

        body = {"message": e.message,

                "code": status_code,

                "data": e.data,

                }

        data = {"itemNotFound": body}

    except qh_exception.InvalidDataError as e:

        status_code = 400

        body = {"message": e.message,

                "code": status_code,

                }

        data = {"badRequest": body}

    return json_response(data, status_code=status_code)

@transaction.commit_on_success

def _issue_commission(clientkey, provisions, name, force, accept):

    serial = qh.issue_commission(clientkey=clientkey,

                                 provisions=provisions,

                                 name=name,

                                 force=force)

    if accept:

        qh.resolve_pending_commission(clientkey=clientkey, serial=serial)

    return serial

def notFoundCF(serial):

    body = {"code": 404,

            "message": "serial %s does not exist" % serial,

            }

    return {"itemNotFound": body}

def conflictingCF(serial):

    body = {"code": 400,

            "message": "cannot both accept and reject serial %s" % serial,

            }

    return {"badRequest": body}

@csrf_exempt

@api.api_method(http_method='POST', token_required=True, user_required=False)

@component_from_token

@transaction.commit_on_success

def resolve_pending_commissions(request):

    data = request.body

    try:

        input_data = json.loads(data)

    except json.JSONDecodeError:

        raise BadRequest("POST data should be in json format.")

    client_key = str(request.component_instance)

    accept = input_data.get('accept', [])

    reject = input_data.get('reject', [])

    if not isinstance(accept, list) or not isinstance(reject, list):

        m = '"accept" and "reject" should reference lists of serials.'

        raise BadRequest(m)

    if not are_integer(accept) or not are_integer(reject):

        raise BadRequest("Serials should be integer.")

    result = qh.resolve_pending_commissions(clientkey=client_key,

                                            accept_set=accept,

                                            reject_set=reject)

    accepted, rejected, notFound, conflicting = result

    notFound = [(serial, notFoundCF(serial)) for serial in notFound]

    conflicting = [(serial, conflictingCF(serial)) for serial in conflicting]

    cloudfaults = notFound + conflicting

    data = {'accepted': accepted,

            'rejected': rejected,

            'failed': cloudfaults

            }

    return json_response(data)

@api.api_method(http_method='GET', token_required=True, user_required=False)

@component_from_token

def get_commission(request, serial):

    data = request.GET

    client_key = str(request.component_instance)

    try:

        serial = int(serial)

    except ValueError:

        raise BadRequest("Serial should be an integer.")

    try:

        data = qh.get_commission(clientkey=client_key,

                                 serial=serial)

        status_code = 200

        return json_response(data, status_code)

    except qh_exception.NoCommissionError:

        return HttpResponse(status=404)

@csrf_exempt

@api.api_method(http_method='POST', token_required=True, user_required=False)

@component_from_token

@transaction.commit_on_success

def serial_action(request, serial):

    data = request.body

    try:

        input_data = json.loads(data)

    except json.JSONDecodeError:

        raise BadRequest("POST data should be in json format.")

    try:

        serial = int(serial)

    except ValueError:

        raise BadRequest("Serial should be an integer.")

    client_key = str(request.component_instance)

    accept = 'accept' in input_data

    reject = 'reject' in input_data

    if accept == reject:

        raise BadRequest('Specify either accept or reject action.')

    result = qh.resolve_pending_commission(clientkey=client_key,

                                           serial=serial,

                                           accept=accept)

    response = HttpResponse()

    if not result:

        response.status_code = 404

    return response