class ExchangeRatesPoller(object):
API_key = '7cf21b8b9b8f4b7a887a5cde5ae85949'
API_fetch_interval = timedelta(hours=1)
def __init__(self):
self.client = OpenExchangeRatesClient(ExchangeRatesPoller.API_key)
self.currencies = self.client.currencies()
logging.info(
"ExchangeRatesPoller initialized.\nSupported currencies:\n" +
"\n".join([c + ": " + self.currencies[c] for c in self.currencies
]))
self.last_api_fetch_time = None
def poll_data(self):
if self.client is None or self.last_api_fetch_time is None \
or (datetime.utcnow() - self.last_api_fetch_time >
ExchangeRatesPoller.API_fetch_interval):
self.lastest = self.client.latest()
self.rates = self.lastest['rates']
self.last_api_fetch_time = datetime.utcnow()
logging.info(' '.join(
[self.__class__.__name__, ": poll_data() fetched new data at:",
self.last_api_fetch_time.isoformat()]))
else:
logging.info(' '.join([self.__class__.__name__, (
": poll_data() called within fetch "
"interval threshold, use previous "
"fetched data at:"), self.last_api_fetch_time.isoformat()]))
def trigger_notification(self, message):
print message
def check_exchange_rates(self, currencies):
rates = {}
for c in currencies:
if c.upper() not in self.rates:
logging.error(' '.join([self.__class__.__name__, ": currency:",
c, "not found in self.rates dict."]))
raise Exception("Currency: %s Not recognized!" % c)
rates[c] = float(self.rates[c.upper()])
rates_str_lst = [
"USD exchange rate to " + rc.upper() + ": " + str(rates[rc])
for rc in rates
]
rates_str = '\n'.join(rates_str_lst)
logging.debug(' '.join([self.__class__.__name__,
": check_exchange_rates()\n", rates_str]))
return rates_str_lst
class OpenExchangeRatesAdapter(BaseAdapter):
"""This adapter uses openexchangerates.org service to populate currency and
exchange rate models.
"""
API_KEY_SETTINGS_KEY = 'OPENEXCHANGERATES_API_KEY'
def __init__(self):
self.client = OpenExchangeRatesClient(
getattr(settings, self.API_KEY_SETTINGS_KEY))
def get_currencies(self):
return self.client.currencies().items()
def get_exchangerates(self, base):
return self.client.latest(base)['rates'].items()
class OpenExchangeRatesAdapter(BaseAdapter):
"""This adapter uses openexchangerates.org service to populate currency and
exchange rate models.
"""
API_KEY_SETTINGS_KEY = 'OPENEXCHANGERATES_API_KEY'
def __init__(self):
self.client = OpenExchangeRatesClient(
getattr(settings, self.API_KEY_SETTINGS_KEY))
def get_currencies(self):
return self.client.currencies().items()
def get_exchangerates(self, code):
return self.client.latest(code)['rates'].items()
class OpenExchangeRateConnector:
def __init__(self, api_key):
self.client = OpenExchangeRatesClient(api_key)
def get_all_rates(self):
currencies = self.client.currencies()
latest = self.client.latest()['rates']
rates = []
for currency in currencies:
short_name = currency
if short_name not in settings.CURRENCY_FILTER:
continue
full_name = currencies[currency]
exchange_rate = latest[currency]
rates.append(ExchangeRateData(short_name=short_name, full_name=full_name, exchange_rate=exchange_rate))
return rates
def handle(self, *args, **options):
self.verbose = int(options.get('verbosity', 0))
self.options = options
self.force = self.options['force']
self.imports = [e for e in self.options['import'] if e]
client = OpenExchangeRatesClient(APP_ID)
if self.verbose >= 1:
self.stdout.write("Querying database at %s" % (client.ENDPOINT_CURRENCIES))
symbols = {}
with open(self.file_path) as df:
symbols = json.load(df)
currencies = client.currencies()
for code in sorted(currencies.keys()):
if (not self.imports) or code in self.imports:
if not C._default_manager.filter(code=code) or self.force is True:
if self.verbose >= 1:
self.stdout.write("Creating %r (%s)" % (currencies[code], code))
c, created = C._default_manager.get_or_create(code=code)
if created is True:
C._default_manager.filter(pk=c.pk).update(name=currencies[code], is_active=False)
if bool(c.symbol) and self.force is False:
continue
symbol = symbols.get(c.code)
if symbol is not None:
C._default_manager.filter(pk=c.pk).update(symbol=symbol)
else:
if self.verbose >= 1:
self.stdout.write("Skipping %r (%s)" % (currencies[code], code))
