Synnefo

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

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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 synnefo.lib.db.transaction import commit_on_success_strict

from astakos.api.util import json_response

from astakos.im.api import api_method as generic_api_method

from astakos.im.api.user import api_method as user_api_method

from astakos.im.api.service import api_method as service_api_method

from astakos.im.api.faults import BadRequest, InternalServerError

from astakos.im.quotas import get_user_quotas, get_resources

import astakos.quotaholder.exception as qh_exception

from astakos.quotaholder.callpoint import QuotaholderDjangoDBCallpoint

qh = QuotaholderDjangoDBCallpoint()

@user_api_method(http_method='GET', token_required=True)

def quotas(request, user=None):

    result = get_user_quotas(user)

    return json_response(result)

@generic_api_method(http_method='GET')

def resources(request):

    result = get_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)

    else:

        raise BadRequest('Method not allowed.')

@service_api_method(http_method='GET', token_required=True)

def get_pending_commissions(request):

    data = request.GET

    client_key = str(request.service_instance)

    result = qh.get_pending_commissions(clientkey=client_key)

    return json_response(result)

@csrf_exempt

@service_api_method(http_method='POST', token_required=True)

def issue_commission(request):

    data = request.raw_post_data

    input_data = json.loads(data)

    client_key = str(request.service_instance)

    provisions = input_data['provisions']

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

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

    try:

        result = _issue_commission(clientkey=client_key,

                                   provisions=provisions,

                                   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)

@commit_on_success_strict()

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

    serial = qh.issue_commission(clientkey=clientkey,

                                 provisions=provisions,

                                 force=force)

    if accept:

        done = qh.accept_commission(clientkey=clientkey,

                                    serial=serial)

    return serial

def failed_to_cloudfault(failed):

    serial, reason = failed

    if reason == 'NOTFOUND':

        body = {"code": 404,

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

                }

        cloudfault = {"itemNotFound": body}

    elif reason == 'CONFLICT':

        body = {"code": 400,

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

                }

        cloudfault = {"badRequest": body}

    else:

        raise InternalServerError('Unexpected error')

    return (serial, cloudfault)

@csrf_exempt

@service_api_method(http_method='POST', token_required=True)

@commit_on_success_strict()

def resolve_pending_commissions(request):

    data = request.raw_post_data

    input_data = json.loads(data)

    client_key = str(request.service_instance)

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

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

    result = qh.resolve_pending_commissions(clientkey=client_key,

                                            accept_set=accept,

                                            reject_set=reject)

    accepted, rejected, failed = result

    cloudfaults = [failed_to_cloudfault(f) for f in failed]

    data = {'accepted': accepted,

            'rejected': rejected,

            'failed': cloudfaults

            }

    return json_response(data)

@service_api_method(http_method='GET', token_required=True)

def get_commission(request, serial):

    data = request.GET

    client_key = str(request.service_instance)

    serial = int(serial)

    try:

        data = qh.get_commission(clientkey=client_key,

                                 serial=serial)

        status_code = 200

        return json_response(data, status_code)

    except qh_exception.NoCommissionError as e:

        return HttpResponse(status=404)

@csrf_exempt

@service_api_method(http_method='POST', token_required=True)

@commit_on_success_strict()

def serial_action(request, serial):

    data = request.raw_post_data

    input_data = json.loads(data)

    serial = int(serial)

    client_key = str(request.service_instance)

    accept = 'accept' in input_data

    reject = 'reject' in input_data

    if accept == reject:

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

    if accept:

        result = qh.accept_commission(clientkey=client_key,

                                      serial=serial)

    else:

        result = qh.reject_commission(clientkey=client_key,

                                      serial=serial)

    response = HttpResponse()

    if not result:

        response.status_code = 404

    return response