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GitHub Repository: wiseplat/python-code
 Path: blob/master/ invest-robot-contest_sirius-master/services/instruments_info_cache.py
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from api_calls.get_info import get_shares

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from utils.util import is_file_exists, read_dict_from_file, write_dict_to_file, pretty_dict

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instruments_cache = {}

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instruments_cache_filename = 'data/cache_instruments'

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# Кэш инструментов. Зачитывается с сервера один раз и записывается в файл. Кэш можно сбросить запуском --reset-robot

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def get_instruments_cache():

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    return instruments_cache

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def make_instrument_key(exchange, ticker):

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    return exchange + '_' + ticker

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def get_instrument_info(exchange, ticker):

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    global instruments_cache

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    return get_instrument_info_by_key(make_instrument_key(exchange, ticker))

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def get_instrument_info_by_key(key):

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    global instruments_cache

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    return instruments_cache[key]

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def init_instruments_cache():

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    global instruments_cache

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    if is_file_exists(instruments_cache_filename):

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        instruments_cache = read_dict_from_file(instruments_cache_filename)

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        return

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    shares = get_shares()['instruments']

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    instruments_cache = {}

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    for instrument in shares:

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        ticker = instrument['ticker']

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        exchange = instrument['exchange']

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        instruments_cache[make_instrument_key(exchange, ticker)] = {

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            'ticker': instrument['ticker'],

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            'exchange': instrument['exchange'],

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            'figi': instrument['figi'],

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            'min_lot': instrument['lot'],

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            'currency': instrument['currency'].upper(),

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            'class_code': instrument['classCode']

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        }

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    write_dict_to_file(instruments_cache_filename, instruments_cache)

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