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

# Licensed 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 netaddr

import os

import uuid

from .utils import force_ip

from .utils import ScriptRunner

from .exceptions import NetworkError

from .exceptions import ParamProcessingError

__all__ = ('ParamProcessingError', 'process_cidr', 'process_host',

'process_ssh_key', 'process_add_quotes_around_values',

'process_password', 'process_string_nofloat', 'process_bool')

def process_cidr(param, param_name, config=None):

"""

Corrects given CIDR if necessary.

"""

if '/' not in param:

# we need to skip this if single IP address has been given

return param

try:

return str(netaddr.IPNetwork(param).cidr)

except Exception as ex:

raise ParamProcessingError(str(ex))

def process_host(param, param_name, config=None):

"""

Tries to change given parameter to IP address, if it is in hostname

format

"""

try:

return force_ip(param, allow_localhost=True)

except NetworkError as ex:

raise ParamProcessingError(str(ex))

def process_ssh_key(param, param_name, config=None):

"""

Generates SSH key if given key in param doesn't exist. In case param

is an empty string it generates default SSH key ($HOME/.ssh/id_rsa).

"""

def create_key(path):

# make path absolute

path = os.path.expanduser(path)

path = os.path.abspath(path)

# create new ssh key

local = ScriptRunner()

local.append('ssh-keygen -f "%s" -N ""' % path)

local.execute()

if not param:

key_file = '%s/.ssh/id_rsa' % os.environ["HOME"]

param = '%s.pub' % key_file

if not os.path.isfile(param):

create_key(key_file)

elif not os.path.isfile(param):

key_file = param.endswith('.pub') and param[:-4] or param

param = param.endswith('.pub') and param or ('%s.pub' % param)

create_key(key_file)

return param

def process_add_quotes_around_values(param, param_name, config=None):

"""

Add a single quote character around each element of a comma

separated list of values

"""

params_list = param.split(',')

for index, elem in enumerate(params_list):

if not elem.startswith("'"):

elem = "'" + elem

if not elem.endswith("'"):

elem = elem + "'"

params_list[index] = elem

param = ','.join(params_list)

return param

def process_password(param, param_name, config=None):

"""

Process passwords, checking the following:

1- If there is a user-entered password, use it

2- Otherwise, check for a global default password, and use it if available

3- As a last resort, generate a random password

"""

if not hasattr(process_password, "pw_dict"):

process_password.pw_dict = {}

if param == "PW_PLACEHOLDER":

if config["CONFIG_DEFAULT_PASSWORD"] != "":

param = config["CONFIG_DEFAULT_PASSWORD"]

else:

# We need to make sure we store the random password we provide

# and return it once we are asked for it again

if param_name.endswith("_CONFIRMED"):

unconfirmed_param = param_name[:-10]

if unconfirmed_param in process_password.pw_dict:

param = process_password.pw_dict[unconfirmed_param]

else:

param = uuid.uuid4().hex[:16]

process_password.pw_dict[unconfirmed_param] = param

elif param_name not in process_password.pw_dict:

param = uuid.uuid4().hex[:16]

process_password.pw_dict[param_name] = param

else:

param = process_password.pw_dict[param_name]

return param

def process_heat(param, param_name, config=None):

if config["CONFIG_SAHARA_INSTALL"] == 'y':

param = 'y'

return param

def process_string_nofloat(param, param_name, config=None):

"""

Process a string, making sure it is *not* convertible into a float

If it is, change it into a random 16 char string, and check again

"""

while True:

try:

float(param)

except ValueError:

return param

else:

param = uuid.uuid4().hex[:16]

def process_bool(param, param_name, config=None):

"""Converts param to appropriate boolean representation.

Retunrs True if answer == y|yes|true, False if answer == n|no|false.

"""

if param.lower() in ('y', 'yes', 'true'):

return True

elif param.lower() in ('n', 'no', 'false'):

return False

# Define silent processors

for proc_func in (process_bool, process_add_quotes_around_values):

proc_func.silent = True