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#! /usr/bin/env python3
##
## coinfetch - Cryptocurrency price fetcher
## Copyright (C) 2015-2017 Delwink, LLC
##
## Redistributions, modified or unmodified, in whole or in part, must retain
## applicable copyright or other legal privilege notices, these conditions, and
## the following license terms and disclaimer. Subject to these conditions,
## the holder(s) of copyright or other legal privileges, author(s) or
## assembler(s), and contributors of this work hereby grant to any person who
## obtains a copy of this work in any form:
##
## 1. Permission to reproduce, modify, distribute, publish, sell, sublicense,
## use, and/or otherwise deal in the licensed material without restriction.
##
## 2. A perpetual, worldwide, non-exclusive, royalty-free, irrevocable patent
## license to reproduce, modify, distribute, publish, sell, use, and/or
## otherwise deal in the licensed material without restriction, for any and all
## patents:
##
## a. Held by each such holder of copyright or other legal privilege,
## author or assembler, or contributor, necessarily infringed by the
## contributions alone or by combination with the work, of that privilege
## holder, author or assembler, or contributor.
##
## b. Necessarily infringed by the work at the time that holder of
## copyright or other privilege, author or assembler, or contributor made
## any contribution to the work.
##
## NO WARRANTY OF ANY KIND IS IMPLIED BY, OR SHOULD BE INFERRED FROM, THIS
## LICENSE OR THE ACT OF DISTRIBUTION UNDER THE TERMS OF THIS LICENSE,
## INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR
## A PARTICULAR PURPOSE, AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS,
## ASSEMBLERS, OR HOLDERS OF COPYRIGHT OR OTHER LEGAL PRIVILEGE BE LIABLE FOR
## ANY CLAIM, DAMAGES, OR OTHER LIABILITY, WHETHER IN ACTION OF CONTRACT, TORT,
## OR OTHERWISE ARISING FROM, OUT OF, OR IN CONNECTION WITH THE WORK OR THE USE
## OF OR OTHER DEALINGS IN THE WORK.
##
from argparse import Action, ArgumentParser
from configparser import ConfigParser
from cfetch import __version__, get_ticker, get_registered_tickers
from cfetch import load_default_plugins, NoSuchKindException
from cfetch import NoSuchPairException
from os.path import expanduser, join, exists
from os import makedirs
__title__ = 'coinfetch'
__author__ = 'David McMackins II'
__version_info__ = '''{} {}
Copyright (C) 2015-2017 Delwink, LLC
License COIL: Copyfree Open Innovation License 0.5
<http://coil.apotheon.org/plaintext/00.5.txt>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by {}'''.format(__title__, __version__, __author__)
CONFIG_DIR = join(expanduser('~'), '.coinfetch')
CONFIG_PATH = join(CONFIG_DIR, 'config.ini')
config = ConfigParser()
if not exists(CONFIG_PATH):
if not exists(CONFIG_DIR):
makedirs(CONFIG_DIR)
config['coinfetch'] = {}
config['coinfetch']['api'] = 'cb'
with open(CONFIG_PATH, 'w') as f:
config.write(f)
else:
config.read(CONFIG_PATH)
default_api = config['coinfetch']['api']
load_default_plugins()
tickers = get_registered_tickers()
tickers.sort()
apis = [api for api, desc in tickers]
class DefaultApiAction(Action):
def __call__(self, parser, values, namespace, option_string):
config['coinfetch']['api'] = namespace
with open(CONFIG_PATH, 'w') as f:
config.write(f)
print('Default API set to', namespace)
exit(0)
class ListAction(Action):
def __call__(self, parser, values, namespace, option_string):
for api, desc in tickers:
if api == default_api:
desc += ' (default)'
print(api + '\t- ' + desc)
exit(0)
class VersionAction(Action):
def __call__(self, parser, values, namespace, option_string):
print(__version_info__)
exit(0)
cli = ArgumentParser(__title__)
cli.add_argument('-a', '--api', default=default_api, choices=apis,
help='uses an API by name')
cli.add_argument('-k', '--kind', help='specifies which kind of rate to get')
cli.add_argument('-l', '--list-apis', action=ListAction,
help='list available APIs and exit', nargs=0)
cli.add_argument('--set-default', action=DefaultApiAction, choices=apis,
help='sets the default API and exits')
cli.add_argument('-v', '--version', action=VersionAction,
help='show version information and exit', nargs=0)
cli.add_argument('amount', default=1, help='amount of the original currency',
nargs='?', type=float)
cli.add_argument('src', help='currency from which to convert')
cli.add_argument('dest', help='currency to which to convert')
args = cli.parse_args()
try:
ticker = get_ticker(args.api)
rate_args = [args.src, args.dest, args.amount]
if args.kind:
rate_args.append(args.kind)
rate = ticker.get_rate(*rate_args)
print(format(rate, '.8f'))
except NoSuchKindException:
print('The', args.kind, 'rate is not available with the', args.api, 'API.')
exit(10)
except NoSuchPairException:
pair = '/'.join([args.src, args.dest])
print('The pair', pair, 'was not found using the', args.api, 'API.')
exit(11)
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