openuds/server/src/uds/REST/methods/services_usage.py

# -*- coding: utf-8 -*-

#
# Copyright (c) 2012-2019 Virtual Cable S.L.
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#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
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#      this list of conditions and the following disclaimer.
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#      and/or other materials provided with the distribution.
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#      may be used to endorse or promote products derived from this software
#      without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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"""
@author: Adolfo Gómez, dkmaster at dkmon dot com
"""

import logging
import typing

from django.utils.translation import ugettext as _

from uds.models import UserService
from uds.core.util.state import State
from uds.core.util.model import processUuid
from uds.REST.model import DetailHandler

# Not imported at runtime, just for type checking
if typing.TYPE_CHECKING:
    from uds.models import Provider

logger = logging.getLogger(__name__)


class ServicesUsage(DetailHandler):
    """
    Rest handler for Assigned Services, which parent is Service
    """

    @staticmethod
    def itemToDict(item: UserService) -> typing.Dict[str, typing.Any]:
        """
        Converts an assigned/cached service db item to a dictionary for REST response
        :param item: item to convert
        :param is_cache: If item is from cache or not
        """
        props = item.getProperties()

        if item.user is None:
            owner = ''
            owner_info = {'auth_id': '', 'user_id': ''}
        else:
            owner = item.user.pretty_name
            owner_info = {'auth_id': item.user.manager.uuid, 'user_id': item.user.uuid}

        return {
            'id': item.uuid,
            'state_date': item.state_date,
            'creation_date': item.creation_date,
            'unique_id': item.unique_id,
            'friendly_name': item.friendly_name,
            'owner': owner,
            'owner_info': owner_info,
            'service': item.deployed_service.service.name,
            'service_id': item.deployed_service.service.uuid,
            'pool': item.deployed_service.name,
            'pool_id': item.deployed_service.uuid,
            'ip': props.get('ip', _('unknown')),
            'source_host': item.src_hostname,
            'source_ip': item.src_ip,
            'in_use': item.in_use,
        }

    def getItems(self, parent: 'Provider', item: typing.Optional[str]):
        try:
            if item is None:
                userServicesQuery = UserService.objects.filter(
                    deployed_service__service__provider=parent
                )
            else:
                userServicesQuery = UserService.objects.filter(
                    deployed_service__service_uuid=processUuid(item)
                )

            return [
                ServicesUsage.itemToDict(k)
                for k in userServicesQuery.filter(state=State.USABLE)
                .order_by('creation_date')
                .prefetch_related('deployed_service')
                .prefetch_related('deployed_service__service')
                .prefetch_related('properties')
                .prefetch_related('user')
                .prefetch_related('user__manager')
            ]

        except Exception:
            logger.exception('getItems')
            raise self.invalidItemException()

    def getTitle(self, parent: 'Provider') -> str:
        return _('Services Usage')

    def getFields(self, parent: 'Provider') -> typing.List[typing.Any]:
        return [
            # {'creation_date': {'title': _('Creation date'), 'type': 'datetime'}},
            {'state_date': {'title': _('Access'), 'type': 'datetime'}},
            {'owner': {'title': _('Owner')}},
            {'service': {'title': _('Service')}},
            {'pool': {'title': _('Pool')}},
            {'unique_id': {'title': 'Unique ID'}},
            {'ip': {'title': _('IP')}},
            {'friendly_name': {'title': _('Friendly name')}},
            {'source_ip': {'title': _('Src Ip')}},
            {'source_host': {'title': _('Src Host')}},
        ]

    def getRowStyle(self, parent: 'Provider') -> typing.Dict[str, typing.Any]:
        return {'field': 'state', 'prefix': 'row-state-'}

    def deleteItem(self, parent: 'Provider', item: str) -> None:
        userService: UserService
        try:
            userService = UserService.objects.get(
                uuid=processUuid(item), deployed_service__service__provider=parent
            )
        except Exception:
            raise self.invalidItemException()

        logger.debug('Deleting user service')
        if userService.state in (State.USABLE, State.REMOVING):
            userService.remove()
        elif userService.state == State.PREPARING:
            userService.cancel()
        elif userService.state == State.REMOVABLE:
            raise self.invalidItemException(_('Item already being removed'))
        else:
            raise self.invalidItemException(_('Item is not removable'))