gstack/controllers/machine_type.py

#!/usr/bin/env python
# encoding: utf-8
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

import urllib
from gstack import app
from gstack import authentication
from gstack import helpers
from gstack import controllers
from gstack.services import requester
from gstack.controllers import errors, zones
from flask import request, url_for


def _get_machinetypes(authorization, args=None):
    command = 'listServiceOfferings'
    if not args:
        args = {}

    cloudstack_response = requester.make_request(
        command,
        args,
        authorization.client_id,
        authorization.client_secret
    )
    return cloudstack_response


def get_machinetype_by_name(authorization, machinetype):
    machinetype_list = _get_machinetypes(
        authorization=authorization
    )

    if machinetype_list['listserviceofferingsresponse']:
        response = controllers.filter_by_name(
            data=machinetype_list['listserviceofferingsresponse'][
                'serviceoffering'],
            name=machinetype
        )
        return response
    else:
        return None


def _cloudstack_machinetype_to_gce(cloudstack_response, projectid, zone):
    response = {}
    response['kind'] = 'compute#machineType'
    response['name'] = cloudstack_response['name']
    response['id'] = cloudstack_response['id']
    response['description'] = cloudstack_response['displaytext']
    response['creationTimestamp'] = cloudstack_response['created']
    response['guestCpus'] = cloudstack_response['cpunumber']
    response['memoryMb'] = cloudstack_response['memory']

    response['selfLink'] = urllib.unquote_plus(helpers.get_root_url() + url_for(
        'getmachinetype',
        projectid=projectid,
        machinetype=cloudstack_response['name'],
        zone=zone
    ))
    response['zone'] = zone

    return response


@app.route('/compute/v1/projects/<projectid>/aggregated/machineTypes', methods=['GET'])
@authentication.required
def aggregatedlistmachinetypes(projectid, authorization):
    machine_types = _get_machinetypes(authorization)
    zonelist = zones.get_zone_names(authorization)

    items = {}
    for zone in zonelist:
        zone_machine_types = []
        if machine_types['listserviceofferingsresponse']:
            for machineType in machine_types['listserviceofferingsresponse']['serviceoffering']:
                zone_machine_types.append(
                    _cloudstack_machinetype_to_gce(
                        cloudstack_response=machineType,
                        projectid=projectid,
                        zone=zone
                    )
                )
        else:
            zone_machine_types.append(errors.no_results_found(zone))

        items['zone/' + zone] = {}
        items['zone/' + zone]['zone'] = zone
        items['zone/' + zone]['machineTypes'] = zone_machine_types

    populated_response = {
        'kind': 'compute#machineTypeAggregatedList',
        'id': 'projects/' + projectid + '/aggregated/machineTypes',
        'selfLink': urllib.unquote_plus(request.base_url),
        'items': items
    }
    return helpers.create_response(data=populated_response)


@app.route('/compute/v1/projects/<projectid>/zones/<zone>/machineTypes', methods=['GET'])
@authentication.required
def listmachinetype(projectid, authorization, zone):
    machinetype = None
    filter = helpers.get_filter(request.args)

    if 'name' in filter:
        machinetype = filter['name']

    items = []

    if machinetype:
        machinetype_list = _get_machinetypes(
            authorization=authorization,
            args={'keyword': machinetype}
        )
        if machinetype_list['listserviceofferingsresponse']:
            machinetype = controllers.filter_by_name(
                data=machinetype_list['listserviceofferingsresponse'][
                    'serviceoffering'],
                name=machinetype
            )
            if machinetype:
                items.append(
                    _cloudstack_machinetype_to_gce(
                        cloudstack_response=machinetype,
                        projectid=projectid,
                        zone=zone
                    )
                )
    else:
        machinetype_list = _get_machinetypes(authorization=authorization)
        if machinetype_list['listserviceofferingsresponse']:
            for machinetype in machinetype_list['listserviceofferingsresponse']['serviceoffering']:
                items.append(
                    _cloudstack_machinetype_to_gce(
                        cloudstack_response=machinetype,
                        projectid=projectid,
                        zone=zone
                    )
                )

    populated_response = {
        'kind': 'compute#imageList',
        'selfLink': urllib.unquote_plus(request.base_url),
        'id': 'projects/' + projectid + '/global/images',
        'items': items
    }

    return helpers.create_response(data=populated_response)


@app.route('/compute/v1/projects/<projectid>/zones/<zone>/machineTypes/<machinetype>', methods=['GET'])
@authentication.required
def getmachinetype(projectid, authorization, zone, machinetype):
    response = get_machinetype_by_name(
        authorization=authorization,
        machinetype=machinetype
    )

    if response:
        return helpers.create_response(
            data=_cloudstack_machinetype_to_gce(
                cloudstack_response=response,
                projectid=projectid,
                zone=zone
            )
        )
    else:
        func_route = url_for(
            'getmachinetype',
            projectid=projectid,
            machinetype=machinetype,
            zone=zone)
        return errors.resource_not_found(func_route)