ResourceBranch.__init__() - Code Metrics - Inspection of "Merge pull request #2993 from Mierdin/resource-com..." - StackStorm/st2 - Measure and Improve Code Quality continuously with Scrutinizer

Completed
Push — master ( 9329a6...6e30e7 )

by Edward
created 2016-11-03 05:23 UTC
ResourceBranch.init() B

↳ Parent: ResourceBranch
Complexity

Conditions
Size

Total Lines
Duplication

Lines	0
Ratio	0 %
Importance

Changes	1
Bugs	0	Features	0
Metric	Value
cc	5
c	1
b	0
f	0
dl	0
loc	42
rs	8.0894
# Licensed to the StackStorm, Inc ('StackStorm') 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 os
import abc
import six
import json
import logging
import httplib
from functools import wraps
import traceback

import yaml

from st2client import commands
from st2client.exceptions.operations import OperationFailureException
from st2client.formatters import table

ALLOWED_EXTS = ['.json', '.yaml', '.yml']
PARSER_FUNCS = {'.json': json.load, '.yml': yaml.safe_load, '.yaml': yaml.safe_load}
LOG = logging.getLogger(__name__)


def add_auth_token_to_kwargs_from_cli(func):
    @wraps(func)
    def decorate(*args, **kwargs):
        ns = args[1]
        if getattr(ns, 'token', None):
            kwargs['token'] = ns.token
        if getattr(ns, 'api_key', None):
            kwargs['api_key'] = ns.api_key
        return func(*args, **kwargs)
    return decorate


class ResourceCommandError(Exception):
    pass


class ResourceNotFoundError(Exception):
    pass


class ResourceBranch(commands.Branch):

    def __init__(self, resource, description, app, subparsers,
                 parent_parser=None, read_only=False, commands=None,
param = 5

class Foo:
    def __init__(self, param):   # "param" would be flagged here
        self.param = param
                 has_disable=False):

        self.resource = resource
        super(ResourceBranch, self).__init__(
            self.resource.get_alias().lower(), description,
            app, subparsers, parent_parser=parent_parser)

        # Registers subcommands for managing the resource type.
        self.subparsers = self.parser.add_subparsers(
            help=('List of commands for managing %s.' %
                  self.resource.get_plural_display_name().lower()))

        # Resolves if commands need to be overridden.
        commands = commands or {}
        cmd_map = {
            "list": ResourceListCommand,
            "get": ResourceGetCommand,
            "create": ResourceCreateCommand,
            "update": ResourceUpdateCommand,
            "delete": ResourceDeleteCommand,
            "enable": ResourceEnableCommand,
            "disable": ResourceDisableCommand
        }
        for cmd, cmd_class in cmd_map.items():
            if cmd not in commands:
                commands[cmd] = cmd_class

        # Instantiate commands.
        args = [self.resource, self.app, self.subparsers]
        self.commands['list'] = commands['list'](*args)
        self.commands['get'] = commands['get'](*args)

        if not read_only:
            self.commands['create'] = commands['create'](*args)
            self.commands['update'] = commands['update'](*args)
            self.commands['delete'] = commands['delete'](*args)

        if has_disable:
            self.commands['enable'] = commands['enable'](*args)
            self.commands['disable'] = commands['disable'](*args)


@six.add_metaclass(abc.ABCMeta)
class ResourceCommand(commands.Command):
    pk_argument_name = None

    def __init__(self, resource, *args, **kwargs):

        has_token_opt = kwargs.pop('has_token_opt', True)

        super(ResourceCommand, self).__init__(*args, **kwargs)

        self.resource = resource

        if has_token_opt:
            self.parser.add_argument('-t', '--token', dest='token',
                                     help='Access token for user authentication. '
                                          'Get ST2_AUTH_TOKEN from the environment '
                                          'variables by default.')
            self.parser.add_argument('--api-key', dest='api_key',
                                     help='Api Key for user authentication. '
                                          'Get ST2_API_KEY from the environment '
                                          'variables by default.')

        # Formatter flags
        self.parser.add_argument('-j', '--json',
                                 action='store_true', dest='json',
                                 help='Prints output in JSON format.')
        self.parser.add_argument('-y', '--yaml',
                                 action='store_true', dest='yaml',
                                 help='Prints output in YAML format.')

    @property
    def manager(self):
        return self.app.client.managers[self.resource.__name__]

    @property
    def arg_name_for_resource_id(self):
        resource_name = self.resource.get_display_name().lower()
        return '%s-id' % resource_name.replace(' ', '-')

    def print_not_found(self, name):
        print ('%s "%s" is not found.\n' %

               (self.resource.get_display_name(), name))

    def get_resource(self, name_or_id, **kwargs):
        pk_argument_name = self.pk_argument_name

        if pk_argument_name == 'name_or_id':
            instance = self.get_resource_by_name_or_id(name_or_id=name_or_id, **kwargs)
        elif pk_argument_name == 'ref_or_id':
            instance = self.get_resource_by_ref_or_id(ref_or_id=name_or_id, **kwargs)
        else:
            instance = self.get_resource_by_pk(pk=name_or_id, **kwargs)

        return instance

    def get_resource_by_pk(self, pk, **kwargs):
        """
        Retrieve resource by a primary key.
        """
        try:
            instance = self.manager.get_by_id(pk, **kwargs)
        except Exception as e:
            traceback.print_exc()
            # Hack for "Unauthorized" exceptions, we do want to propagate those
            response = getattr(e, 'response', None)
            status_code = getattr(response, 'status_code', None)
            if status_code and status_code == httplib.UNAUTHORIZED:
                raise e

            instance = None

        return instance

    def get_resource_by_id(self, id, **kwargs):

        instance = self.get_resource_by_pk(pk=id, **kwargs)

        if not instance:
            message = ('Resource with id "%s" doesn\'t exist.' % (id))
            raise ResourceNotFoundError(message)
        return instance

    def get_resource_by_name(self, name, **kwargs):
        """
        Retrieve resource by name.
        """
        instance = self.manager.get_by_name(name, **kwargs)
        return instance

    def get_resource_by_name_or_id(self, name_or_id, **kwargs):
        instance = self.get_resource_by_name(name=name_or_id, **kwargs)
        if not instance:
            instance = self.get_resource_by_pk(pk=name_or_id, **kwargs)

        if not instance:
            message = ('Resource with id or name "%s" doesn\'t exist.' %
                       (name_or_id))
            raise ResourceNotFoundError(message)
        return instance

    def get_resource_by_ref_or_id(self, ref_or_id, **kwargs):
        instance = self.manager.get_by_ref_or_id(ref_or_id=ref_or_id, **kwargs)

        if not instance:
            message = ('Resource with id or reference "%s" doesn\'t exist.' %
                       (ref_or_id))
            raise ResourceNotFoundError(message)
        return instance

    @abc.abstractmethod
    def run(self, args, **kwargs):
        raise NotImplementedError

    @abc.abstractmethod
    def run_and_print(self, args, **kwargs):
        raise NotImplementedError

    def _get_metavar_for_argument(self, argument):
        return argument.replace('_', '-')

    def _get_help_for_argument(self, resource, argument):
        argument_display_name = argument.title()
        resource_display_name = resource.get_display_name().lower()

        if 'ref' in argument:
            result = ('Reference or ID of the %s.' % (resource_display_name))
        elif 'name_or_id' in argument:
            result = ('Name or ID of the %s.' % (resource_display_name))
        else:
            result = ('%s of the %s.' % (argument_display_name, resource_display_name))

        return result


class ResourceTableCommand(ResourceCommand):
    display_attributes = ['id', 'name', 'description']

    def __init__(self, resource, name, description, *args, **kwargs):
        super(ResourceTableCommand, self).__init__(resource, name, description,
                                                   *args, **kwargs)

        self.parser.add_argument('-a', '--attr', nargs='+',
                                 default=self.display_attributes,
                                 help=('List of attributes to include in the '
                                       'output. "all" will return all '
                                       'attributes.'))
        self.parser.add_argument('-w', '--width', nargs='+', type=int,
                                 default=None,
                                 help=('Set the width of columns in output.'))

    @add_auth_token_to_kwargs_from_cli
    def run(self, args, **kwargs):
        return self.manager.get_all(**kwargs)

    def run_and_print(self, args, **kwargs):
        instances = self.run(args, **kwargs)
        self.print_output(instances, table.MultiColumnTable,
                          attributes=args.attr, widths=args.width,
                          json=args.json, yaml=args.yaml)


class ResourceListCommand(ResourceTableCommand):
    def __init__(self, resource, *args, **kwargs):
        super(ResourceListCommand, self).__init__(resource, 'list',
            'Get the list of %s.' % resource.get_plural_display_name().lower(),
            *args, **kwargs)


class ContentPackResourceListCommand(ResourceListCommand):
    """
    Base command class for use with resources which belong to a content pack.
    """
    def __init__(self, resource, *args, **kwargs):
        super(ContentPackResourceListCommand, self).__init__(resource,
                                                             *args, **kwargs)

        self.parser.add_argument('-p', '--pack', type=str,
                                 help=('Only return resources belonging to the'
                                       ' provided pack'))

    @add_auth_token_to_kwargs_from_cli
    def run(self, args, **kwargs):
        filters = {'pack': args.pack}
        filters.update(**kwargs)
        return self.manager.get_all(**filters)


class ResourceGetCommand(ResourceCommand):
    display_attributes = ['all']
    attribute_display_order = ['id', 'name', 'description']

    pk_argument_name = 'name_or_id'  # name of the attribute which stores resource PK

    def __init__(self, resource, *args, **kwargs):
        super(ResourceGetCommand, self).__init__(resource, 'get',
            'Get individual %s.' % resource.get_display_name().lower(),
            *args, **kwargs)

        argument = self.pk_argument_name
        metavar = self._get_metavar_for_argument(argument=self.pk_argument_name)
        help = self._get_help_for_argument(resource=resource,

                                           argument=self.pk_argument_name)

        self.parser.add_argument(argument,
                                 metavar=metavar,
                                 help=help)
        self.parser.add_argument('-a', '--attr', nargs='+',
                                 default=self.display_attributes,
                                 help=('List of attributes to include in the '
                                       'output. "all" or unspecified will '
                                       'return all attributes.'))

    @add_auth_token_to_kwargs_from_cli
    def run(self, args, **kwargs):
        resource_id = getattr(args, self.pk_argument_name, None)
        return self.get_resource_by_id(resource_id, **kwargs)

    def run_and_print(self, args, **kwargs):
        try:
            instance = self.run(args, **kwargs)
            self.print_output(instance, table.PropertyValueTable,
                              attributes=args.attr, json=args.json, yaml=args.yaml,
                              attribute_display_order=self.attribute_display_order)
        except ResourceNotFoundError:
            resource_id = getattr(args, self.pk_argument_name, None)
            self.print_not_found(resource_id)
            raise OperationFailureException('Resource %s not found.' % resource_id)


class ContentPackResourceGetCommand(ResourceGetCommand):
    """
    Command for retrieving a single resource which belongs to a content pack.

    Note: All the resources which belong to the content pack can either be
    retrieved by a reference or by an id.
    """

    attribute_display_order = ['id', 'pack', 'name', 'description']

    pk_argument_name = 'ref_or_id'

    def get_resource(self, ref_or_id, **kwargs):
        return self.get_resource_by_ref_or_id(ref_or_id=ref_or_id, **kwargs)


class ResourceCreateCommand(ResourceCommand):

    def __init__(self, resource, *args, **kwargs):
        super(ResourceCreateCommand, self).__init__(resource, 'create',
            'Create a new %s.' % resource.get_display_name().lower(),
            *args, **kwargs)

        self.parser.add_argument('file',
                                 help=('JSON/YAML file containing the %s to create.'
                                       % resource.get_display_name().lower()))

    @add_auth_token_to_kwargs_from_cli
    def run(self, args, **kwargs):
        data = load_meta_file(args.file)
        instance = self.resource.deserialize(data)
        return self.manager.create(instance, **kwargs)

    def run_and_print(self, args, **kwargs):
        try:
            instance = self.run(args, **kwargs)
            if not instance:
                raise Exception('Server did not create instance.')
            self.print_output(instance, table.PropertyValueTable,
                              attributes=['all'], json=args.json, yaml=args.yaml)
        except Exception as e:
            message = e.message or str(e)
            print('ERROR: %s' % (message))
            raise OperationFailureException(message)


class ResourceUpdateCommand(ResourceCommand):
    pk_argument_name = 'name_or_id'

    def __init__(self, resource, *args, **kwargs):
        super(ResourceUpdateCommand, self).__init__(resource, 'update',
            'Updating an existing %s.' % resource.get_display_name().lower(),
            *args, **kwargs)

        argument = self.pk_argument_name
        metavar = self._get_metavar_for_argument(argument=self.pk_argument_name)
        help = self._get_help_for_argument(resource=resource,

                                           argument=self.pk_argument_name)

        self.parser.add_argument(argument,
                                 metavar=metavar,
                                 help=help)
        self.parser.add_argument('file',
                                 help=('JSON/YAML file containing the %s to update.'
                                       % resource.get_display_name().lower()))

    @add_auth_token_to_kwargs_from_cli
    def run(self, args, **kwargs):
        resource_id = getattr(args, self.pk_argument_name, None)
        instance = self.get_resource(resource_id, **kwargs)
        data = load_meta_file(args.file)
        modified_instance = self.resource.deserialize(data)

        if not getattr(modified_instance, 'id', None):
            modified_instance.id = instance.id
        else:
            if modified_instance.id != instance.id:
                raise Exception('The value for the %s id in the JSON/YAML file '
                                'does not match the ID provided in the '
                                'command line arguments.' %
                                self.resource.get_display_name().lower())
        return self.manager.update(modified_instance, **kwargs)

    def run_and_print(self, args, **kwargs):
        instance = self.run(args, **kwargs)
        try:
            self.print_output(instance, table.PropertyValueTable,
                              attributes=['all'], json=args.json, yaml=args.yaml)
        except Exception as e:
            print('ERROR: %s' % e.message)
            raise OperationFailureException(e.message)


class ContentPackResourceUpdateCommand(ResourceUpdateCommand):
    pk_argument_name = 'ref_or_id'


class ResourceEnableCommand(ResourceCommand):
    pk_argument_name = 'name_or_id'

    def __init__(self, resource, *args, **kwargs):
        super(ResourceEnableCommand, self).__init__(resource, 'enable',
            'Enable an existing %s.' % resource.get_display_name().lower(),
            *args, **kwargs)

        argument = self.pk_argument_name
        metavar = self._get_metavar_for_argument(argument=self.pk_argument_name)
        help = self._get_help_for_argument(resource=resource,

                                           argument=self.pk_argument_name)

        self.parser.add_argument(argument,
                                 metavar=metavar,
                                 help=help)

    @add_auth_token_to_kwargs_from_cli
    def run(self, args, **kwargs):
        resource_id = getattr(args, self.pk_argument_name, None)
        instance = self.get_resource(resource_id, **kwargs)

        data = instance.serialize()

        if 'ref' in data:
            del data['ref']

        data['enabled'] = True
        modified_instance = self.resource.deserialize(data)

        return self.manager.update(modified_instance, **kwargs)

    def run_and_print(self, args, **kwargs):
        instance = self.run(args, **kwargs)
        self.print_output(instance, table.PropertyValueTable,
                          attributes=['all'], json=args.json, yaml=args.yaml)


class ContentPackResourceEnableCommand(ResourceEnableCommand):
    pk_argument_name = 'ref_or_id'


class ResourceDisableCommand(ResourceCommand):
    pk_argument_name = 'name_or_id'

    def __init__(self, resource, *args, **kwargs):
        super(ResourceDisableCommand, self).__init__(resource, 'disable',
            'Disable an existing %s.' % resource.get_display_name().lower(),
            *args, **kwargs)

        argument = self.pk_argument_name
        metavar = self._get_metavar_for_argument(argument=self.pk_argument_name)
        help = self._get_help_for_argument(resource=resource,

                                           argument=self.pk_argument_name)

        self.parser.add_argument(argument,
                                 metavar=metavar,
                                 help=help)

    @add_auth_token_to_kwargs_from_cli
    def run(self, args, **kwargs):
        resource_id = getattr(args, self.pk_argument_name, None)
        instance = self.get_resource(resource_id, **kwargs)

        data = instance.serialize()

        if 'ref' in data:
            del data['ref']

        data['enabled'] = False
        modified_instance = self.resource.deserialize(data)

        return self.manager.update(modified_instance, **kwargs)

    def run_and_print(self, args, **kwargs):
        instance = self.run(args, **kwargs)
        self.print_output(instance, table.PropertyValueTable,
                          attributes=['all'], json=args.json, yaml=args.yaml)


class ContentPackResourceDisableCommand(ResourceDisableCommand):
    pk_argument_name = 'ref_or_id'


class ResourceDeleteCommand(ResourceCommand):
    pk_argument_name = 'name_or_id'

    def __init__(self, resource, *args, **kwargs):
        super(ResourceDeleteCommand, self).__init__(resource, 'delete',
            'Delete an existing %s.' % resource.get_display_name().lower(),
            *args, **kwargs)

        argument = self.pk_argument_name
        metavar = self._get_metavar_for_argument(argument=self.pk_argument_name)
        help = self._get_help_for_argument(resource=resource,

                                           argument=self.pk_argument_name)

        self.parser.add_argument(argument,
                                 metavar=metavar,
                                 help=help)

    @add_auth_token_to_kwargs_from_cli
    def run(self, args, **kwargs):
        resource_id = getattr(args, self.pk_argument_name, None)
        instance = self.get_resource(resource_id, **kwargs)
        self.manager.delete(instance, **kwargs)

    def run_and_print(self, args, **kwargs):
        resource_id = getattr(args, self.pk_argument_name, None)

        try:
            self.run(args, **kwargs)
            print('Resource with id "%s" has been successfully deleted.' % (resource_id))
        except ResourceNotFoundError:
            self.print_not_found(resource_id)
            raise OperationFailureException('Resource %s not found.' % resource_id)


class ContentPackResourceDeleteCommand(ResourceDeleteCommand):
    """
    Base command class for deleting a resource which belongs to a content pack.
    """

    pk_argument_name = 'ref_or_id'


def load_meta_file(file_path):
    if not os.path.isfile(file_path):
        raise Exception('File "%s" does not exist.' % file_path)

    file_name, file_ext = os.path.splitext(file_path)
    if file_ext not in ALLOWED_EXTS:
        raise Exception('Unsupported meta type %s, file %s. Allowed: %s' %
                        (file_ext, file_path, ALLOWED_EXTS))

    with open(file_path, 'r') as f:
        return PARSER_FUNCS[file_ext](f)

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